Comprehensive Education Bolivarian-Style: The Alternative School in Barrio Pueblo Nuevo, Venezuela

ERIC Educational Resources Information Center

Cole, Mike

2014-01-01

In this article, the author traces revolutionary developments in an alternative school in Barrio Pueblo Nuevo, Mérida, in the Bolivarian Republic of Venezuela, a school that caters for students between 4 and 14. He begins by recounting some fieldwork done at the school on his behalf by Edward Ellis in 2010. He goes on to discuss a video made at…

Prevalence of Trypanosoma cruzi infection in dogs and small mammals in Nuevo León, Mexico.

PubMed

Galaviz-Silva, Lucio; Mercado-Hernández, Roberto; Zárate-Ramos, José J; Molina-Garza, Zinnia J

Chagas disease, caused by the protozoan Trypanosoma cruzi, is an important public health concern in areas extending from South America northward into the southern United States of America. Although this hemoflagellate has many wild and domestic mammalians reported as reservoir hosts, studies on this subject are scarce in Nuevo León state, a region located in northeastern Mexico. This cross-sectional study showed that the general prevalence of T. cruzi infection in Nuevo León state was 14.5% (35/241), this percentage matching the ones determined by PCR and traditional diagnostics. Localities and infected mammals did not significantly differ (χ 2 =6.098, p=0.192); however the number of infected animals was highly correlated with mammalian species (p=0.009). Striped skunks (Mephitis mephitis) were found to be the most infected overall (11/34, 32.3%), while dogs (Canis familiaris) had the lowest prevalence. In conclusion, although the prevalence of T. cruzi infection in small mammals was lower in Nuevo León than in other states of Mexico, our results provide new locality records, including striped skunks, opossums (Didelphis marsupialis) and dogs, and extend the recorded area to woodrats (Neotoma micropus). Copyright © 2017 Asociación Argentina de Microbiología. Publicado por Elsevier España, S.L.U. All rights reserved.

[Distribution of Aedes albopictus (Skuse) in Nuevo León, México, 2001-2004].

PubMed

Orta-Pesina, Héctor; Mercado-Hernández, Roberto; Elizondo-Leal, José Fernando

2005-01-01

To determine the distribution of Aedes albopictus (Skuse) in Nuevo Leon between 2001 and 2004. Standardized methods were used to collect 6371 samples of mosquito's larvae from 167 sites. The proportions of samples positive for Ae. albopictus were obtained by municipality and year, using the software program Excel. There were 1179 samples positive for Ae. albopictus. This species was distributed over 10 municipalities, as follows: Five on the Gulf of Mexico Coastal Plains, which predominantly have a semi-warm, sub-humid climate, and precipitations almost year round (Allende, Montemorelos, Linares, General Teran, and Santiago); two (Sabinas Hidalgo, and Cadereyta) localized on the North American Great Plains, which have a warm, semiarid climate, and scarce precipitations. The final three were Apodaca, San Nicolas, and Escobedo distributed over the metropolitan area of Monterrey City. Up to January 2004, the second most important epidemiological vector in the transmission cycle of Ae. albopictus worldwide was found in ten municipalities of Nuevo Leon State, Mexico.

Nuevos Horizontes, James Monroe High School, 1987-1988. Evaluation Section Report. OREA Report.

ERIC Educational Resources Information Center

Berney, Tomi D.; Lista, Carlos

Proyecto Nuevos Horizontes (Project New Horizons) at James Monroe High School (New York City) served 328 students of limited English proficiency (LEP) in grades 9-12 during the final year of a 3-year funding cycle. The project's purpose was to build on the strengths of the school's extensive computer-assisted instructional program in order to…

Assessing biodiversity in Nuevo Leon, Mexico: Are nature reserves the answer?

USGS Publications Warehouse

Cantu, C.; Wright, R.G.; Scott, J.M.; Strand, Espen

2004-01-01

The Mexican state of Nuevo Leon, located in the northeastern portion of the country, currently has 26 state and three federal nature reserves covering approximately 4.5% of its land area. These reserves were established for a variety of reasons not necessarily related to conservation purposes. In 2000 in response to a growing concern about the lack of organized conservation reserve planning to protect the important biological and physical features of Mexico, the Mexican Commission for Knowledge and Use of Biodiversity proposed 12 new terrestrial reserves for Nuevo Leon. The new reserves, if established, would increase the proportion of protected lands in the state to almost 24% of the state's land area. We compiled a Geographic Information System (GIS) analysis using digital thematic maps of physical and ecological features to examine how well the existing and proposed reserves incorporated the major biological and physical features of the state. The existing reserves are located primarily in regions with elevations > 1,000-1,500 m, on less productive soils, and are dominated by pine and oak forest cover types. As a result, the state's dominant biotic region - low elevation coastal plain with xeric scrub vegetation - is disproportionately under represented in the current reserve system. The new reserves would expand the protection of biophysical resources throughout the state. However, the inclusion of important resources in the low elevation coastal lands would still be limited.

Ano Nuevo to Santa Cruz, California : a photographic tour of the coastline

USGS Publications Warehouse

Chezar, Henry; Wong, Florence L.

2000-01-01

This interactive CD ROM contains over 500 overlapping photographic images of the California coastline from A?o Nuevo to Santa Cruz. The images were taken from the R/V David Johnston to illustrate the coastal geology adjacent to part of the Monterey Bay National Marine Sanctuary. The introductory home page starts a series of links to a regional map, more detailed area maps, and finally the individual photographic images.

Characterization of the dengue outbreak in Nuevo Leon state, Mexico, 2010.

PubMed

Leduc-Galindo, D; Gloria-Herrera, U; Rincón-Herrera, U; Ramos-Jiménez, J; Garcia-Luna, S; Arellanos-Soto, D; Mendoza-Tavera, N; Tavitas-Aguilar, I; Garcia-Garcia, E; Galindo-Galindo, E; Villarreal-Perez, J; Fernandez-Salas, I; Santiago, G A; Muñoz-Jordan, J; Rivas-Estilla, A M

2015-04-01

We studied serotypes circulating dengue virus (DENV) cases, entomological Breteau index, rain-fall index and epidemiology of groups affected during the 2010 outbreak in Nuevo Leon, Mexico. From 2,271 positive cases, 94% were dengue classic and 6% dengue hemorrhagic fever; DENV1 was mainly isolated (99%) (Central-American lineage of American-African-genotype). We found correlation between two environmental phenomena (Increment of rainfall and vector-indexes) (p ≤ 0.05) with epidemiological, clinical and risk of DENV-1 ongoing transmission.

Binational Teacher Development: Teacher Ambassador Exchange Program, New Mexico, USA and Nuevo Leon, Mexico.

ERIC Educational Resources Information Center

Habermann, Mary Jean

The report describes the rationale for and history of an exchange program for Nuevo Leon (Mexico) and New Mexico bilingual education teachers. The program evolved from the need to help Spanish-speaking students maintain their own language and culture while in the United States. New Mexico's state policy concerning language-minority children and…

Analysis of the interaction of deuterium plasmas with tungsten in the Fuego-Nuevo II device

NASA Astrophysics Data System (ADS)

Ramos, Gonzalo; Castillo, Fermín; Nieto, Martín; Martínez, Marco; Rangel, José; Herrera-Velázquez, Julio

2012-10-01

Tungsten is one of the main candidate materials for plasma-facing components in future fusion power plants. The Fuego-Nuevo II, a plasma focus device, which can produce dense magnetized helium and deuterium plasmas, has been adapted to address plasma-facing materials questions. In this paper we present results of tungsten targets exposed to deuterium plasmas in the Fuego Nuevo II device, using different experimental conditions. The plasma generated and accelerated in the coaxial gun is expected to have, before the pinch, energies of the order of hundreds eV and velocities of the order of 40,000 m s-1. At the pinch, the ions are reported to have energies of the order of 1.5 keV at most. The samples, analysed with a scanning electron microscope (SEM) in cross section show a damage profile to depths of the order of 580 nm, which are larger than those expected for ions with 1.5 keV, and may be evidence of ion acceleration. An analysis with the SRIM (Stopping Range of Ions in Matter) package calculations is shown.

[Differences in the health and disease conditions in the rural and urban-suburban populations in Nuevo León state].

PubMed

Kroeger, A; Malo, F; Pérez Samaniego, C; Berg, H

1991-01-01

This work shows the results of two surveys taken in the state of Nuevo León, Mexico during 1985. The first survey, which covered morbidity and health service use, was taken from 759 households in urban/suburban Monterrey (a city of two million inhabitants and capital of the state of Nuevo León) and from 751 households from a stratified sample from the rest of the state. The second survey, which had to do with the different aspects of quality health services available, was given to 752 patients in 93 distinct health units in Monterrey and all over the state. The objectives of this publication are: 1) to describe the morbidity of the populations in question, as well as to describe the different aspects of the supply and demand of health services; 2) to compare the conditions of life reflected in the state of health between the rural and urban/suburban zones of Nuevo León. The results obtained show that those in the urban/suburban zones of Monterrey possess certain advantages over those in the rural areas in the state of Nuevo León such as: a higher level of schooling, lower emigration to the U.S.A., a lower fertility index, lower morbidity from severe illnesses and a lower death rate in children, wider coverage from health insurance, better communication between doctor and patient, more frequent use of health services, and greater participation in prevention programs. Rural area life has the following advantages: a lower number of cesarean sections, and a prolonged period of maternal suckling. In this work, we present the opinion that the primary health care currently centered in the urban zones, where the population is much greater, should not impair the required attention in the rural areas (areas that are more extensive and often unattended).

Ethnobotany in Rayones, Nuevo León, México

PubMed Central

2014-01-01

Background Trough collections of plants and interviews with 110 individuals, an ethnobotanical study was conducted in order to determine the knowledge and use plant species in Rayones, Nuevo Leon, Mexico. The aim of this study was to record all useful plants and their uses, to know whether differences exist in the knowledge about the number of species and uses between women and men, and to know if there is a correlation between the age of individuals and knowledge of species and their uses. Methods A total of 110 persons were interviewed (56 men, 56 women). Semistructured interviews were carried out. The data were analyzed by means of Student t test and the Pearson Correlation Coeficient. Results A total of 252 species, 228 genera and 91 families of vascular plants were recorded. Astraceae, Fabaceae and are the most important families with useful species and Agave and Opuntia are the genera with the highest number of useful species. One hundred and thirty six species are considered as medicinal. Agave, Acacia and Citrus are the genera with the highest number of medicinal species. Other uses includes edible, spiritual rituals, construction and ornamentals. There was a non-significant correlation between the person’s age and number of species, but a significant very low negative correlation between the person’s age and number of uses was found. Conclusions Knowing their medicinal uses is an important issue for the people of Rayones. Boiling and preparing infusions are the main ways of using plants by residents. The leaves, the branches, and the fruits are the most commonly used parts. Almost 18% of the flora is used for wood and construction purposes. Several uses such as cosmetic, shampoo, firming skin tonics and health hair products recorded in Rayones has not been reported for other areas in the state of Nuevo León. In Rayones, women have a greater knowledge about plants and their uses than men, particularly, medicinal plants, but, men have a greater

Ethnobotany in Rayones, Nuevo León, México.

PubMed

Estrada-Castillón, Eduardo; Garza-López, Miriam; Villarreal-Quintanilla, José Ángel; Salinas-Rodríguez, María Magdalena; Soto-Mata, Brianda Elizabeth; González-Rodríguez, Humberto; González-Uribe, Dino Ulises; Cantú-Silva, Israel; Carrillo-Parra, Artemio; Cantú-Ayala, César

2014-09-01

Trough collections of plants and interviews with 110 individuals, an ethnobotanical study was conducted in order to determine the knowledge and use plant species in Rayones, Nuevo Leon, Mexico. The aim of this study was to record all useful plants and their uses, to know whether differences exist in the knowledge about the number of species and uses between women and men, and to know if there is a correlation between the age of individuals and knowledge of species and their uses. A total of 110 persons were interviewed (56 men, 56 women). Semistructured interviews were carried out. The data were analyzed by means of Student t test and the Pearson Correlation Coeficient. A total of 252 species, 228 genera and 91 families of vascular plants were recorded. Astraceae, Fabaceae and are the most important families with useful species and Agave and Opuntia are the genera with the highest number of useful species. One hundred and thirty six species are considered as medicinal. Agave, Acacia and Citrus are the genera with the highest number of medicinal species. Other uses includes edible, spiritual rituals, construction and ornamentals. There was a non-significant correlation between the person's age and number of species, but a significant very low negative correlation between the person's age and number of uses was found. Knowing their medicinal uses is an important issue for the people of Rayones. Boiling and preparing infusions are the main ways of using plants by residents. The leaves, the branches, and the fruits are the most commonly used parts. Almost 18% of the flora is used for wood and construction purposes. Several uses such as cosmetic, shampoo, firming skin tonics and health hair products recorded in Rayones has not been reported for other areas in the state of Nuevo León. In Rayones, women have a greater knowledge about plants and their uses than men, particularly, medicinal plants, but, men have a greater knowledge about wood and construction species.

"Optics 4 every1", the hands-on optics outreach program of the Universidad Autonoma de Nuevo Leon

NASA Astrophysics Data System (ADS)

Viera-González, Perla M.; Sánchez-Guerrero, Guillermo E.

2016-09-01

The Fisica Pato2 (Physics 4 every1) outreach group started as a need of hands-on activities and active Science demonstrations in the education for kids, teenagers and basic education teachers in Nuevo Leffon maintaining a main objective of spread the word about the importance of Optics and Photonics; for accomplish this objective, since November 2013 several outreach events are organized every year by the group. The program Optics 4 every1 is supported by the Facultad de Ciencias Fisico Matematicas of the Universidad Autonoma de Nuevo Leon and the International Society for Optics and Photonics and consist in quick hands-on activities and Optics demonstrations designed for teach basic optical phenomena related with light and its application in everyday life. During 2015, with the purpose of celebrate the International Year of Light 2015, the outreach group was involved in 13 different events and reached more than 8,000 people. The present work explains the activities done and the outcome obtained with this program.

Learning Styles and Attitudes toward Online Education in Four Universities in the State of Nuevo Leon, Mexico

ERIC Educational Resources Information Center

Martinez de Monarrez, Patricia; Korniejczuk, Victor

2013-01-01

The purpose of this research was to find the relation-ship between the predominant learning styles among university online students and their attitude toward online education. Data were collected from 385 students enrolled in undergraduate and graduate programs from four universities in the state of Nuevo Leon, Mexico. Significant effects of…

El bosque estatal del nuevo milenio antes y después del huracán Georges

Treesearch

A.E. Lugo; E. Román Nunci; M. Quinones; H. Marcano Vega; I. Vicéns

2005-01-01

We studied changes that occurred between 1997 and 2005 on a secondary wet subtropical urban forest in the University of Puerto Rico’s Botanical Garden (Bosque Estatal del Nuevo Milenio). Hurricane Georges passed south of the forest on November 21, 1998 with 127 km/h winds. The study consisted of identifying species in 40 plots of 254 m2 each, measuring the diameter at...

[Heart transplant in Monterrey, Nuevo León].

PubMed

Herrera-Garza, Eduardo Heberto; Molina-Gamboa, Julio David; Ortega-Durán, Oscar Alejandro; Chavarria-Martánez, Uriel; Martínez-Chapa, Héctor David; Elizondo-Sifuentes, Luis Angel; De-La-fuente-Magallanes, Felipe de Jesús; Muñiz-García, Arturo; Decanini-Arcaute, Horacio; Ibarra-Flores, Marcos; Nacoud-Askar, Alfredo; Herrera-Garza, José Luis; Torre-Amionet, Guillermo

2011-09-01

Heart failure constantly increases its incidence and prevalence in our society, it was imperative to start a heart transplant program to improve the survival rates of patients with end stages of the disease. Legal issues made impossible to transplant patients out of Mexico City until recent years. Even with an acute hemodynamic and clinic improvement after the transplant, these patients frequently develop complications such as graft rejection or opportunistic infections due to the immunosuppressive schemes increasing the morbidity and mortality of the procedure. In the present article we report the experience acquired with 65 heart transplant patients from 4 transplant programs in Monterrey, Nuevo Leon, one of them from the socialized system and the other three from private hospitals. Our program not only has successfully transplanted patients with advanced age but, for the first time in Latin America we have transplanted patients assisted with the ambulatory Thoratec TLC II system. Even that we have faced obstacles like a newly started donation culture in our population and limited resources, our patient's survival rate push us to continue working with these very ill population.

[Effects of reforestation on tree pollen sensitization in inhabitants of Nuevo Leon, Mexico].

PubMed

Palma-Gómez, Samuel; González-Díaz, Sandra Nora; Arias-Cruz, Alfredo; Macías-Weinmann, Alejandra; Amaro-Vivian, Laura Elizabeth; Pérez-Vanzzini, Rafael; Gutiérrez-Mujica, José Julio; Yong-Rodríguez, Adrián

2014-01-01

Climate change has implications for health, ecology and society. Urban green areas are a key element in the planning of cities, promoting citizen interaction with the environment, as well as health. Lack of planning and design of these areas as well as the selection of ornamental trees can be a trigger of pollen allergy in the surrounding population. Reforestation is among the programs implemented by the government that have an impact on allergy. Environmental reforestation programs do not take into account the allergenic potential of some species. In the last 4 years, the government of Nuevo Leon, Mexico, has planted nearly 18,000 Quercus species trees, in addition to an unknown number of Fraxinus species trees that are listed as tree species with high pollen production. To identify changes in tree pollen sensitization, based on environmental reforestation programs. A retrospective and descriptive study was done in which positive skin prick tests to pollen from trees in the interval of 2010-2014 were analyzed, correlating between tree species used for reforestation and increased sensitivity to the former. A statistically significant increase in pollen sensitization to species with which Nuevo Leon was reforested was found, along with a decrease in sensitization to the species that were not reforested. Reforestation contributes to some extent to the change in the pattern of positive skin tests and may result in more frequent exacerbations of respiratory diseases. It is an activity that should always be regulated and assisted by experts in the according field.

[Asthma mortality in the state of Nuevo León, México].

PubMed

Canseco González, C; González Díaz, S; Alvarado Valdés, C

1993-01-01

Definition of asthma has radically changed in the last few years. It has been given great importance to the its inflammatory component that can become irreversible. It is not clear yet the cause of the increase in prevalence and mortality of asthma observed in developed countries despite an increase in the number and efficacy of the therapeutic resources. There is still much to do on studying of the statistics on prevalence and mortality rate of the undeveloped countries. In Latin America, asthma prevalence, in 1983 was reported in 3.5% in seven countries. We reviewed the death certificates in the state of Nuevo León, México, in the 1980's decade, and compared the total death rate with those attributed to asthma, according to the diagnostics criteria code 493 from the International Classification of Diseases. We also reviewed the clinical records of patients admitted to a general hospital (University Hospital of Monterrey, Nuevo Leon, Mexico) as well as the autopsy reports from the same time period. General mortality rate, as well as the mortality rate due to respiratory diseases (asthma, emphysema, chronic bronchitis and others) was unchanged (5.5 x 100,000 people), despite an increase of 100% in the size of the population. Asthma prevalence has increased from 1.2% in 1979 to 2.5% in 1989 (approximately 75,000 cases). From the 1,114 autopsies done in the University Hospital in the 1980's decade, none could be attributed to an asthma death. It is mandatory that other states in this country report parallel studies to ours, so we can have reliable data on prevalence and mortality rates of asthma. In doing so, we can learn the distribution and consequences of this disease.

Antitumor activity of Chlorella sorokiniana and Scenedesmus sp. microalgae native of Nuevo León State, México.

PubMed

Reyna-Martinez, Raul; Gomez-Flores, Ricardo; López-Chuken, Ulrico; Quintanilla-Licea, Ramiro; Caballero-Hernandez, Diana; Rodríguez-Padilla, Cristina; Beltrán-Rocha, Julio Cesar; Tamez-Guerra, Patricia

2018-01-01

Cancer cases result in 13% of all deaths worldwide. Unwanted side effects in patients under conventional treatments have led to the search for beneficial alternative therapies. Microalgae synthesize compounds with known in vitro and in vivo biological activity against different tumor cell lines. Therefore, native microalgae from the State of Nuevo Leon, Mexico may become a potential source of antitumor agents. The aim of the present study was to evaluate the in vitro cytotoxic effect of Nuevo Leon regional Chlorella sorokiniana (Chlorellales: Chlorellaceae) and Scenedesmus sp. (Chlorococcales: Scenedesmaceae). Native microalgae crude organic extracts cytotoxicity against murine L5178Y-R lymphoma cell line and normal lymphocyte proliferation were evaluated using the MTT reduction colorimetric assay. Cell death pathway was analyzed by acridine orange and ethidium bromide staining, DNA degradation in 2% agarose gel electrophoresis and caspases activity. Results indicated significant ( p  < 0.05) 61.89% ± 3.26% and 74.77% ± 1.84% tumor cytotoxicity by C. sorokiniana and Scenedesmus sp. methanol extracts, respectively, at 500 µg/mL, by the mechanism of apoptosis. This study contributes to Mexican microalgae biodiversity knowledge and their potential as antitumor agent sources.

Antitumor activity of Chlorella sorokiniana and Scenedesmus sp. microalgae native of Nuevo León State, México

PubMed Central

Beltrán-Rocha, Julio Cesar

2018-01-01

Cancer cases result in 13% of all deaths worldwide. Unwanted side effects in patients under conventional treatments have led to the search for beneficial alternative therapies. Microalgae synthesize compounds with known in vitro and in vivo biological activity against different tumor cell lines. Therefore, native microalgae from the State of Nuevo Leon, Mexico may become a potential source of antitumor agents. The aim of the present study was to evaluate the in vitro cytotoxic effect of Nuevo Leon regional Chlorella sorokiniana (Chlorellales: Chlorellaceae) and Scenedesmus sp. (Chlorococcales: Scenedesmaceae). Native microalgae crude organic extracts cytotoxicity against murine L5178Y-R lymphoma cell line and normal lymphocyte proliferation were evaluated using the MTT reduction colorimetric assay. Cell death pathway was analyzed by acridine orange and ethidium bromide staining, DNA degradation in 2% agarose gel electrophoresis and caspases activity. Results indicated significant (p < 0.05) 61.89% ± 3.26% and 74.77% ± 1.84% tumor cytotoxicity by C. sorokiniana and Scenedesmus sp. methanol extracts, respectively, at 500 µg/mL, by the mechanism of apoptosis. This study contributes to Mexican microalgae biodiversity knowledge and their potential as antitumor agent sources. PMID:29441241

Bioaccumulation of lead, copper, iron, and zinc by fish in a transect of the Santa Catarina River in Cadereyta Jimenez, Nuevo Leon, Mexico

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

1986-09-01

Changes have been observed in the ichthyic species community, upriver in the San Juan River in Nuevo Leon, Mexico. A disappearance of Notropis amabilis, Notropis stramineus, Dionda episcopa and Campostoma anomalum and an increased mortality of Astyanax mexicanus, Lepomis macrochirus and Cichlasoma cyanoguttatum have been found. These changes were probably due to industrial and domestic discharges which produced high levels of lead, copper, iron and detergents in the water. The investigation reported here was done in order to detect the possible presence of lead, copper, iron and zinc in the river waters and also, to determine a probable bioaccumulation ofmore » these metals in fish species of the Santa Catarina River in the state of Nuevo Leon in northeastern Mexico, since this river transports domestic and industrial wastes of urban and suburban zones.« less

Ethnobotany in the Cumbres de Monterrey National Park, Nuevo León, México

PubMed Central

Estrada, Eduardo; Villarreal, José A; Cantú, César; Cabral, Ismael; Scott, Laura; Yen, Carmen

2007-01-01

An ethnobotanical study in the Cumbres de Monterrey National Park (CMNP), Nuevo Leon, Mexico was conducted. In spite of the large area (1,773.7 km2), heterogeneous physiography, contrasting plant communities and high species diversity of the CMNP, very little was previously known about its useful plants. Based on 95 interviews with inhabitants of the region who were 35 years or older, we recorded ethnobotanical data of 240 species (comprising 170 genera and 69 botanical families), and 146 different uses. Most of the cited uses (98) were found to be medicinal ones. Background An ethnobotanical study in the Cumbres de Monterrey National Park (CMNP), Nuevo Leon, Mexico was conducted. In spite of the large area (1,773.7 km2), heterogeneous physiography, contrasting plant communities and high species diversity of the CMNP, very little was previously known about its useful plants. Based on 95 interviews with inhabitants of the region who were 35 years old or older, we recorded ethnobotanical data of 240 species (comprising 170 genera and 69 botanical families), and 146 different uses. Most of the cited uses (98) were found to be medicinal ones. Methods Ninety five inhabitants 35 years old and oldest were interviewed to know what are the main plant uses in the Cumbres de Monterrey National Park. Results and discussion Two hundred and forty species, 170 genera, and 69 families of useful plants and 146 different uses were recorded. We found most of the uses to be medicinal (98), while the rest (48) represent various purposes. Herbaceous plants are the most used, followed by shrubs and trees. PMID:17263889

Detection of a typhus group Rickettsia in Amblyomma ticks in the state of Nuevo Leon, Mexico.

PubMed

Medina-Sanchez, Aaron; Bouyer, Donald H; Alcantara-Rodriguez, Virginia; Mafra, Claudio; Zavala-Castro, Jorge; Whitworth, Ted; Popov, Vsevolod L; Fernandez-Salas, Ildefonso; Walker, David H

2005-12-01

The state of Nuevo Leon, Mexico has had outbreaks of typhus group rickettsiosis, most recently recognized in 1997. Evaluation of the sera of 345 patients with a dengue-like illness revealed that 25.5% had antibodies reactive with typhus group rickettsiae and 16% had antibodies to Rickettsia parkeri. Rickettsiae were detected by PCR and shell-vial isolations in the field-collected Amblyomma ticks. Molecular characterization by DNA sequence analysis of the gltA, ompB, and 17-kDa gene identified the organisms to be R. prowazekii.

Swath Bathymetry Surveys of the Monterey Bay Area from Point Ano Nuevo to Moss Landing, San Mateo, Santa Cruz, and Monterey Counties, California

USGS Publications Warehouse

Ritchie, Andrew C.; Finlayson, David P.; Logan, Joshua B.

2010-01-01

This report describes swath bathymetry and backscatter data acquired by the U.S. Geological Survey on the continental shelf within the Monterey Bay National Marine Sanctuary between Point A?o Nuevo and Moss Landing, in San Mateo, Santa Cruz, and Monterey Counties, Calif. The survey was done for the California Seafloor Mapping Program (CSMP), in field activities S-7-09-MB and S-10-09-MB, by the Western Coastal and Marine Geology (WCMG) Team of the U.S. Geological Survey (USGS). The data were aquired in two seperate surveys: (1) between August 13, 2009 and September 3, 2009, personnel from WCMG completed field activity S-7-09-MB, from Point A?o Nuevo south to Table Rock, as well as a block west of Soquel Canyon; (2) between October 12 and December 16, 2009, WCMG conducted field activity S-10-09-MB, surveying between Table Rock and Moss Landing.

Traffic related deaths in Nuevo Leon, Mexico: causes and associated factors.

PubMed

Arreola-Rissa, Carlos; Santos-Guzmán, Jesús; Esquivel-Guzmán, Adol; Mock, Charles N

2008-01-01

The effects of alcohol on mortality due to motor vehicle accidents was studied. During the first semester of 2003, a sample of 243 fatality victims of traffic-related accidents and their blood alcohol levels were analyzed in the state of Nuevo Leon, Mexico. The age-adjusted mortality rate for traffic accidents was 8.9/100000 pop. (13.2 for males and 3.21 for females, per 100000). Fatal accidents were more common in the Metropolitan Area (MA). Fatalities were four times greater in males and the mean age was 34.7+/-18.2 years. Blood alcohol was detected in almost half of the victims who were drivers of the vehicles; the other cases of fatalities may be associated with road/car condition, weather and other factors. Alcohol intoxication levels were primarily associated with male drivers ages 16 to 45 (p=0.029); levels increased with age. In females, alcohol played a lesser role, affecting mostly ages 31 to 45 y (p=0.055).

Genetic structure of the populations migrating from San Luis Potosi and Zacatecas to Nuevo León in Mexico.

PubMed

Cerda-Flores, R M; Kshatriya, G K; Barton, S A; Leal-Garza, C H; Garza-Chapa, R; Schull, W J; Chakraborty, R

1991-06-01

The Mexicans residing in the Monterrey metropolitan area in Nuevo León, Mexico, were grouped by generation and birthplace [Monterrey Metropolitan Area (MMA), San Luis Potosi (SLP), and Zacatecas (ZAC)] of the four grandparents to determine the extent of genetic variation within this population and the genetic differences, if any, between the natives living in the MMA and the immigrant populations from SLP and ZAC. Nine genetic marker systems were analyzed. The genetic distance analysis indicates that SLP and ZAC are similar to the MMA, irrespective of birthplace and generation. Gene diversity analysis (GST) suggests that more than 96% of the total gene diversity (HT) can be attributed to individual variation within the population. The genetic admixture analysis suggests that the Mexicans of the MMA, SLP, and ZAC, stratified by birthplace and generation, have received a predominantly Spanish contribution (78.5%), followed by a Mexican Indian contribution (21.5%). Similarly, admixture analysis, conducted on the population of Nuevo León and stratified by generation, indicates a substantial contribution from the MMA (64.6%), followed by ZAC (22.1%) and SLP (13.3%). Finally, we demonstrate that there is no nonrandom association of alleles among the genetic marker systems (i.e., no evidence of gametic disequilibrium) despite the Mestizo origin of this population.

HIV/AIDS practice patterns, knowledge, and educational needs among Hispanic clinicians in Texas, USA, and Nuevo Leon, Mexico.

PubMed

Martinez, J L; Licea Serrato, J de D; Jimenez, R; Grimes, R M

1998-07-01

Hispanic clinicians in Texas, United States of America, and in the neighboring state of Nuevo Leon, Mexico, were surveyed to determine their educational needs in the area of HIV/AIDS. Two-thirds of the 74 Texan and 22% of the 104 Mexican physicians queried had seen at least one HIV/AIDS patient in the previous year. The majority of the respondents were primary care physicians who: 1) were in private practice; 2) saw more than 1,000 patients per year; 3) had been out of training for more than 10 years; 4) provided some HIV prevention education to patients based on their perceived risk of infection; 5) rated their own knowledge of HIV/AIDS as average but rated their knowledge of treatments for the disease below average; 6) received most of their information about HIV/AIDS from journals rather than formal continuing education programs; 7) thought Hispanic patients had special needs with regard to HIV/AIDS care; and 8) were willing to attend education programs to improve their HIV/AIDS management skills. The greatest barriers to caring for HIV patients were lack of clinical knowledge and fear of infection. These results point to a need for a large-scale training program to improve the HIV/AIDS management skills of Hispanic clinicians in Texas and Nuevo Leon.

Percepcion de los profesores universitarios acerca del concepto cultura cientifica y de sus implicaciones en el nuevo bachillerato del Recinto de Rio Piedras de la Universidad de Puerto Rico

NASA Astrophysics Data System (ADS)

Ramos Pastrana, Nilsa

El Senado Academico del Recinto de Rio Piedras de la Universidad de Puerto Rico aprobo en el ano academico 2005-2006 la Certificacion 46, que contiene los lineamientos de un nuevo bachillerato. Este nuevo bachillerato introdujo cambios significativos en el curriculo tradicional. Entre ellos se encuentra la reduccion del componente de educacion general y el de Ciencias Biologicas en particular. La reduccion de creditos en el componente de Ciencias Biologicas ha obligado a reevaluar el concepto de cultura cientifica que desarrollan esos cursos. El proposito del estudio consistio en auscultar las percepciones de los profesores de las Facultades de Administracion de Empresas, Humanidades, Ciencias Sociales, Ciencias Naturales, Educacion y Estudios Generales del Recinto de Rio Piedras de la Universidad de Puerto Rico en torno al concepto de cultura cientifica, los contenidos disciplinares del curso de Ciencias Biologicas y la reduccion de creditos en el nuevo bachillerato. Las preguntas que guiaron la investigacion fueron: ¿cuales son las percepciones que tienen los profesores de las Facultades de Administracion de Empresas, Ciencias Sociales, Estudios Generales, Ciencias Naturales, Humanidades y Educacion, en torno al concepto de cultura cientifica y los contenidos disciplinares del curso de Ciencias Biologicas? ¿cuales son las percepciones que tienen los profesores de Ciencias Biologicas en torno al concepto cultura cientifica y los contenidos disciplinares del curso de Ciencias Biologicas? ¿existen diferencias significativas por facultad, genero, experiencia, rango y nombramiento en las percepciones que tienen los profesores del Recinto de Rio Piedras de la Universidad de Puerto Rico sobre los elementos que caracterizan la cultura cientifica y los contenidos biologicos que deben tener los egresados del Recinto? ¿que implicaciones curriculares tienen estos testimonios en el desarrollo del concepto de cultura cientifica en el nuevo bachillerato? Para realizar la

Viviendo Con Incendios: Una guia para los duenos de casas en Nuevo Mexico [Living with Fire: A Guide for the Homeowner-New Mexico

Treesearch

U.S. Department of the Interior Bureau of Land Management

2008-01-01

La posibilidad de perdidas humanas y de propiedad en Nuevo Mexico debido a un incendio forestal ha ido incrementando. Para responder a este peligro, entidades locales, estatales, federales, particulares y sin fines de lucro se han unido para crear Como Reducir la Amenaza de Incendios Forestales, un programa dirigido a los propietarios de casas. Este no es un programa...

Medicinal plants in the southern region of the State of Nuevo León, México

PubMed Central

2012-01-01

Background Although the flora of the State of Nuevo León is well known, there are few records of ethnobotancial information. An ethnobotanical study was undertaken in order to know the medicinal plants used by people living at the scrublands and oak-pine forest areas in the southern Nuevo León. Collection of plants specimens and interviews were carried out among the people of the municipalities of Aramberri, Galeana, and Zaragoza. Since former studies in the region are scarce, the aim of this work was to record the medicinal species and their uses in the scrublands and oak-pine forest areas, of southern Nuevo León, Mexico, and also to know if there are differences in the number of species and number of uses knowledge by people. Methods Field work was carried out over a 2 years period; useful plants were collected and a total of 105 people from 46 different villages were interviewed. A database was compiled using data collected by means of semi structured interviews. The data were analyzed by means of non-parametric statistics, using goodness-of-fit test (Chi-squared) (number of species known by people of each municipality, number of uses known by people of each municipality), Chi-squared modified to incorporate the Yates Correction (number of species known by people living at scrublands and oak-pine forest); the Kruskall-Wallis test (number of species known by women and men of the three municipalities), and the Spearman’s rank correlation coefficient (age and number of species known, and age and number of uses). Results A total of 163 medicinal plant species were recorded in the study area, comprising 108 wild and 55 cultivated plants. A total of 117 species were recorded in the oak-pine forest, and 111 in the scrublands area, a total of 68 were recorded in both areas; 68 medicinal species are used in all three municipalities, 40 wild and 28 cultivated. We documented 235 different medicinal uses. The most common plant parts used for medicinal purposes were

Medicinal plants in the southern region of the State of Nuevo León, México.

PubMed

Estrada-Castillón, Eduardo; Soto-Mata, Brianda Elizabeth; Garza-López, Miriam; Villarreal-Quintanilla, José Ángel; Jiménez-Pérez, Javier; Pando-Moreno, Marisela; Sánchez-Salas, Jaime; Scott-Morales, Laura; Cotera-Correa, Mauricio

2012-12-11

Although the flora of the State of Nuevo León is well known, there are few records of ethnobotancial information. An ethnobotanical study was undertaken in order to know the medicinal plants used by people living at the scrublands and oak-pine forest areas in the southern Nuevo León. Collection of plants specimens and interviews were carried out among the people of the municipalities of Aramberri, Galeana, and Zaragoza. Since former studies in the region are scarce, the aim of this work was to record the medicinal species and their uses in the scrublands and oak-pine forest areas, of southern Nuevo León, Mexico, and also to know if there are differences in the number of species and number of uses knowledge by people. Field work was carried out over a 2 years period; useful plants were collected and a total of 105 people from 46 different villages were interviewed. A database was compiled using data collected by means of semi structured interviews. The data were analyzed by means of non-parametric statistics, using goodness-of-fit test (Chi-squared) (number of species known by people of each municipality, number of uses known by people of each municipality), Chi-squared modified to incorporate the Yates Correction (number of species known by people living at scrublands and oak-pine forest); the Kruskall-Wallis test (number of species known by women and men of the three municipalities), and the Spearman's rank correlation coefficient (age and number of species known, and age and number of uses). A total of 163 medicinal plant species were recorded in the study area, comprising 108 wild and 55 cultivated plants. A total of 117 species were recorded in the oak-pine forest, and 111 in the scrublands area, a total of 68 were recorded in both areas; 68 medicinal species are used in all three municipalities, 40 wild and 28 cultivated. We documented 235 different medicinal uses. The most common plant parts used for medicinal purposes were found to be leaves (123 species

Estimation of nonpaternity in the Mexican population of Nuevo Leon: a validation study with blood group markers.

PubMed

Cerda-Flores, R M; Barton, S A; Marty-Gonzalez, L F; Rivas, F; Chakraborty, R

1999-07-01

A method for estimating the general rate of nonpaternity in a population was validated using phenotype data on seven blood groups (A1A2BO, MNSs, Rh, Duffy, Lutheran, Kidd, and P) on 396 mother, child, and legal father trios from Nuevo León, Mexico. In all, 32 legal fathers were excluded as the possible father based on genetic exclusions at one or more loci (combined average exclusion probability of 0.694 for specific mother-child phenotype pairs). The maximum likelihood estimate of the general nonpaternity rate in the population was 0.118 +/- 0.020. The nonpaternity rates in Nuevo León were also seen to be inversely related with the socioeconomic status of the families, i.e., the highest in the low and the lowest in the high socioeconomic class. We further argue that with the moderately low (69.4%) power of exclusion for these seven blood group systems, the traditional critical values of paternity index (PI > or = 19) were not good indicators of true paternity, since a considerable fraction (307/364) of nonexcluded legal fathers had a paternity index below 19 based on the seven markers. Implications of these results in the context of genetic-epidemiological studies as well as for detection of true fathers for child-support adjudications are discussed, implying the need to employ a battery of genetic markers (possibly DNA-based tests) that yield a higher power of exclusion. We conclude that even though DNA markers are more informative, the probabilistic approach developed here would still be needed to estimate the true rate of nonpaternity in a population or to evaluate the precision of detecting true fathers.

[Pediculus capitis in schoolchildren of the urban area of Nuevo León, México: Analyses of associated factors].

PubMed

Molina-Garza, Zinnia J; Galaviz-Silva, Lucio

2017-09-01

Pediculosis capitis is a recurring problem affecting 6 to 12 millions of children annually; there are no epidemiological data on this subject in the state of Nuevo León, and there are few in México. Therefore, new contributions are needed to design control strategies based on factors that may predispose to head lice infestation. To determine the prevalence of Pediculus capitis in primary school children and to evaluate risk factors and individual or socioeconomic characteristics statistically associated with infestation. We included 840 schoolchildren from six municipalities after parents and children signed an informed consent. Ectoparasites were collected from infested children using a finetoothed comb. Participants were interviewed using a questionnaire on individual and socioeconomic variables including age, gender, education, hair characteristics, overcrowding, and siblings with pediculosis, among others. The overall prevalence of head lice in schoolchildren was 28% (235/840), the highest prevalence was among girls (33.7%, 140/417), and children from the fifth grade (10-11 years old) were the most affected (6.2%; 52/840). Female gender, long hair and the father's education level were significantly associated with P. capitis. Our results showed that the P. capitis prevalence in Nuevo León is one of the highest in Mexico, that it constitutes a real public health problem, and that there is need to establish prevention programs at home and school to decrease or to control P. capitis with the support of public health authorities.

[Not Available].

PubMed

Fort Casamartina, Eduard; Arribas Hortiguela, Lorena; Bleda Pérez, Carmen; Muñoz Sánchez, Carme; Peiro Martínez, Imma; Perayre Badía, María; Clopés Estela, Ana

2016-06-03

Durante la última década, el conocimiento de nuevos mecanismos implicados en el desarrollo del cáncer ha permitido el diseño de nuevos fármacos para su tratamiento y la mayor parte de ellos son fármacos que se administran por vía oral. Uno de los principales problemas de los pacientes oncohematológicos es la desnutrición, que suele tener causas multifactoriales (de la propia enfermedad, de los pacientes y de los diferentes tratamientos administrados). Para minimizar el impacto de la desnutrición es necesaria una intervención nutricional, ya sea adaptando la dieta o mediante la instauración de soporte nutricional artificial, en función de la gravedad de cada caso. En cualquier paciente que esté recibiendo un tratamiento oncológico hay que evaluar las posibles interacciones que pueden existir con el soporte nutricional instaurado, ya sea dieta oral, suplementación oral o nutrición enteral. Estas interacciones pueden disminuir la eficacia, aumentar la toxicidad de los tratamientos o producir déficits nutricionales. Se detallan las principales interacciones que se pueden producir, las interacciones entre los tratamientos oncológicos y el soporte nutricional.

Pesticide residues in orange fruit from citrus orchards in Nuevo Leon State, Mexico.

PubMed

Suárez-Jacobo, Angela; Alcantar-Rosales, Victor Manuel; Alonso-Segura, Diana; Heras-Ramírez, Maria; Elizarragaz-De La Rosa, Dalau; Lugo-Melchor, Ofelia; Gaspar-Ramirez, Octavio

2017-09-01

Some international organisations established maximum residue limits (MRLs) in food to protect human health. Mexico lacks regulations in this matter, affecting national and international trade from agroindustry. The aim of this study was to diagnose pesticide residues in oranges from Nuevo Leon, México, in citrus orchards. In May 2014, 100 orange fruit samples were taken randomly from orchards and subjected to analysis for 93 pesticides at residual level by GC/QQQ-MS and LCQ-TOF-MS. Results showed the presence of 15 pesticide residues in the samples. The comparison of the residual levels of pesticides found in orange samples among the MRLs allowed by USA, EU and Japanese regulations demonstrated that all samples were below MRLs issued by USA and Japan. Some orange samples were above MRLs issued by the EU. This provides a basis to establish strategies in order to satisfy International Standards to protect human health and encourage Food Safety in Mexico.

[Metabolic syndrome prevalence in teenagers of Monterrey, Nuevo Leon].

PubMed

Cárdenas-Villareal, Velia Margarita; López Alvarenga, Juan C; Bastarrachea, Raúl A; Rizo-Baeza, María Mercedes; Cortés-Castell, Ernesto

2010-01-01

To determine the prevalence of the metabolic syndrome (SM) and its components in teenagers from the metropolitan area of Monterrey Nuevo Leon, Mexico (AMM). A transversal research involving 254 teenage students from 10 to 19 years old. To research investigated their personal characteristics, anthropometrics measures, glucose, triglycerides and cholesterol HDL. The SM definition was adapted from the one suggested by the National Cholesterol Education Program-Adult Treatment Panel III (NCEP-ATPIII). The SM prevalence was 9.4 % (IC95%: 5.8 to 13.0), there was not a difference between the sexes. The prevalence among each SM component was: 24.4% for high triglycerides, 20.1% for abdominal obesity, 19.0% for cholesterol of lipoproteins of a high density (HDL-c) low, 11.4 % for high glucose and for high blood pressure (9.1% diastolic and 5.9% systolic). The prevalent SM phenotypes were corporal mass (IMC) (OR = 4.93, IC95%: 2.26, 10.73) and the IMC interaction of the teenager with a family history of obesity (OR = 1.37, IC95%: 1.0, 1.87). It was observed that those with a family history of diabetes type 2 only experienced a marginal effect. The SM prevalence in teenagers from AMM is high it was an alarming situation if it continues into adulthood. The existence of obesity in relatives of the first and second grade, altogether with teenager IMC are important prediction factors of SM.

Velocidad radial de Blue Stragglers en cúmulos abiertos

NASA Astrophysics Data System (ADS)

González, J. F.; Lapasset, E.

Se presentan observaciones espectroscópicas de 32 blue stragglers en 6 cúmulos abiertos. Un mínimo de 4 espectros por objeto fueron obtenidos en base a los cuales se determina tipo espectral, velocidad radial y velocidad de rotación proyectada. La comparación con la velocidad media de los cúmulos aseguraría una alta probabilidad de pertenencia para la mayoría de los objetos estudiados. Un análisis de variabilidad conduce a la detección de un nuevo blue straggler binario en el cúmulo NGC 6530 además de otras probables binarias. En base a la frecuencia de binaridad y a la distribución de velocidades rotacionales se discuten los probables mecanismos de formación de los blue stragglers.

Trypanosoma cruzi -infected Triatoma gerstaeckeri (Hemiptera: Reduviidae) from Nuevo León, México, and pathogenicity of the regional strain.

PubMed

Molina-Garza, Zinnia J; Mercado-Hernández, Roberto; Molina-Garza, Daniel P; Galaviz-Silva, Lucio

2015-01-01

Four species of triatomines have been reported in Nuevo León, northeast (NE) México, but Triatoma gerstaeckeri has only been recorded from a peridomestic dwelling. To assess the natural infection index (NII) of Trypanosoma cruzi in triatomines and the infestation index (II) of T. gerstaeckeri collected in a suburban locality, and to collect histopathological data to understand tissue tropism of the regional T. cruzi strain (strain NE) obtained from the vectors collected after an experimental inoculation in Mus musculus . Triatomines were collected from 85 houses and peridomiciles in Allende, Nuevo León. Stool samples were obtained to determine the T. cruzi NII and were used in an experimental mice infection. A total of 118 T . gerstaeckeri were captured, and 46 (adults and nymphs) were collected inside the same house (II=1.17%). Thirty-seven reduvids were infected with T. cruzi (NII=31.3%). Tissue tropism of the T. cruzi NE strain was progressive in skeletal muscle, myocardial, and adipose tissues and was characterized by the presence of intracellular amastigotes and destruction of cardiac myocells. The presence of naturally infected domiciliary vectors is an important risk factor for public health in the region considering that these vectors are the principal transmission mechanism of the parasite. The T. cruzi NE strain has similar virulence to that of other Mexican and Texan strains and caused chagasic infections in 11 of 12 mice.

Persistent Organic Pollutants and Heavy Metal Concentrations in Soil from the Metropolitan Area of Monterrey, Nuevo Leon, Mexico.

PubMed

Orta-García, Sandra Teresa; Ochoa-Martinez, Angeles Catalina; Carrizalez-Yáñez, Leticia; Varela-Silva, José Antonio; Pérez-Vázquez, Francisco Javier; Pruneda-Álvarez, Lucia Guadalupe; Torres-Dosal, Arturo; Guzmán-Mar, Jorge Luis; Pérez-Maldonado, Iván N

2016-04-01

The purpose of this study was to assess the levels of polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), dichlorodiphenyltrichloroethane (DDT), dichlorodiphenyldichloroethane (DDE), and four heavy metals (arsenic, cadmium, and lead) in outdoor surface soils (50 samples) collected from the metropolitan area of Monterrey in Mexico. Total PBDEs levels ranged from 1.80 to 127 µg/kg, with mean total PBDEs level of 14.2 ± 21.5 µg/kg (geometric mean ± standard deviation). For PCBs, the mean total level in the studied soils was 23.5 ± 20.2 µg/kg (range 4.0-65.5 µg/kg). An important finding in our study was that all soil samples (100%) had detectable levels of the metabolite p,p'-DDE. Moreover, the mean total DDT level (∑p'p-DDT and p'p-DDE) was approximately 132 ± 175 µg/kg. The mean levels for arsenic, cadmium, and lead in soil were 5.30 ± 1.35 (range 1.55-7.85) mg/kg, 2.20 ± 1.20 (range 0.65-6.40) mg/kg, and 455 ± 204 (range 224-1230) mg/kg, respectively. Our study has several limitations, the most notable of which is the small sample of soils evaluated. However, this screening study provided concentration data for the occurrence of POPs and four heavy metals in soil from the metropolitan area of Monterrey, Nuevo Leon, Mexico, and taking into consideration that soil is an important pathway of exposure for people, a biomonitoring program for the surveillance of the general population in the metropolitan area of Monterrey, Nuevo Leon is deemed necessary.

Ethnobotany in the Cumbres de Monterrey National Park, Nuevo León, México.

PubMed

Estrada, Eduardo; Villarreal, José A; Cantú, César; Cabral, Ismael; Scott, Laura; Yen, Carmen

2007-01-30

An ethnobotanical study in the Cumbres de Monterrey National Park (CMNP), Nuevo Leon, Mexico was conducted. In spite of the large area (1,773.7 km2), heterogeneous physiography, contrasting plant communities and high species diversity of the CMNP, very little was previously known about its useful plants. Based on 95 interviews with inhabitants of the region who were 35 years old or older, we recorded ethnobotanical data of 240 species (comprising 170 genera and 69 botanical families), and 146 different uses. Most of the cited uses (98) were found to be medicinal ones. Ninety five inhabitants 35 years old and oldest were interviewed to know what are the main plant uses in the Cumbres de Monterrey National Park. Two hundred and forty species, 170 genera, and 69 families of useful plants and 146 different uses were recorded. We found most of the uses to be medicinal (98), while the rest (48) represent various purposes. Herbaceous plants are the most used, followed by shrubs and trees.

[Molecular detection of hepatitis E virus in pig livers destined for human consumption in the state of Nuevo Leon, Mexico].

PubMed

Cantú-Martínez, Marco Antonio; Roig-Sagués, Artur Xavier; Cedillo-Rosales, Sibilina; Zamora-Ávila, Diana Elisa; Avalos-Ramírez, Ramiro

2013-04-01

Molecular detection of HEV in pig livers destined for human consumption in Nuevo Leon, Mexico. 87 livers were collected from pigs slaughtered in TIF and 40 livers from butchers. A 212 pb fragment of HEV ORF2 gene was amplified by semi-nested RT-PCR. 19.54% (17) of tif's and 22.5% (9) of butcher's livers were positive for HEV. Sequencing of the amplified products showed a 94%-95% homology with the sequences reported for genotype 3. Our results indicate that HEV is circulating in swine herds in the state, constituting a probable source of contamination of pig meat products.

Effectiveness of spinosad and temephos for the control of mosquito larvae at a tire dump in Allende, Nuevo Leon, Mexico.

PubMed

Garza-Robledo, Argentina A; Martínez-Perales, Juan F; Rodríguez-Castro, Violeta A; Quiroz-Martínez, Humberto

2011-12-01

The effectiveness of spinosad and temephos for the control of mosquito larvae was evaluated in a tire dump in Allende, Nuevo Leon, Mexico. Three groups of 12 to 17 tires located in tree shade were utilized for this study. After the larvicides were applied, samples were collected weekly from 7 randomly chosen tires. The data showed a significant difference between the larvicides and control. Under the conditions of the present study, the effectiveness of spinosad against mosquito larvae was similar to that of temephos, both being effective for up to 91 days postapplication. In addition, spinosad allowed the establishment of the mosquito predator Toxorhynchites sp.

Mecanismos cinéticos y distribuciones energéticas de iones (H3+, N2H+, CH3+...) en plasmas fríos de H2/N2/CH4

NASA Astrophysics Data System (ADS)

Tanarro, I.; Herrero, V. J.; Islyaikin, A.; Tabarés, F. L.; Tafalla, D.

En este trabajo se presenta el estudio espectrométrico de los plasmas levemente ionizados generados en una descarga continua a baja presión de H2 con trazas de N2 y CH4, orientado principalmente a identificar la naturaleza y distribución energética de los iones que en ella se producen, y a asignar algunos de los mecanismos cinéticos elementales de formación y destrucción de tales especies. Alguno de los iones mayoritarios de estos plasmas, como el H3+, presenta gran interés desde el punto de vista de la Astrofísica por su prevista intervención en la química de las ionosferas planetarias y del medio interestelar, al actuar como sustancia intermedia en la formación de gran variedad de especies moleculares; si bien, dada su pequeña concentración, su observación real en el espacio se demoró hasta la pasada década de los años 90, cuando fue detectado por primera vez en la atmósfera de Júpiter y en otros objetos estelares. Del mismo modo que los trabajos espectroscópicos de laboratorio resultan indispensables para la posterior identificación de las especies observadas en el espacio, es de esperar que la asignación de los procesos cinéticos más importantes que tienen lugar en los plasmas generados en reactores de descarga, como los aquí presentados, permitan extrapolar los resultados así obtenidos al esclarecimiento de los mecanismos fisico-químicos participantes en otros medios observables únicamente a larga distancia.

[Expand newborn screening using tandem mass spectrometry: two years' experience in Nuevo León, Mexico].

PubMed

Torres-Sepúlveda, María del Rosario; Martínez-de Villarreal, Laura E; Esmer, Carmen; González-Alanís, Rogerio; Ruiz-Herrera, Consuelo; Sánchez-Peña, Alejandra; Mendoza-Cruz, José Alberto; Villarreal-Pérez, Jesús Z

2008-01-01

To initiate a statewide expanded metabolic screening program in neonates with the purpose of identifying the most common inborn errors of metabolism. From March 2002 through February 2004, a blood sample was obtained between 24 and 48 hours after delivery from every consecutive child born in public hospitals in Nuevo León. It was spotted on filter paper and analyzed by tandem mass spectrometry for expanded metabolic screening. A total of 42 264 samples were analyzed. Were obtained seven positive results, one for each disorder: homocystinuria, hyperphenylalaninemia, citrulinemia, transient tyrosinemia, 3-methylcrotonyl CoA carboxylase deficiency, 3-hydroxy-3-methylglutaryl CoA deficiency, and classic galactosemia. The estimated incidence of inborn errors of metabolism is 1:5 000, with a false positive rate of 0.22%. The program permitted the identification of metabolic disorders in the newborn, allowing an early intervention and prevention of life-threatening events and permanent neurological damage.

Estudio del comportamiento tribologico y de las interacciones de superficie de nuevos nanofluidos ionicos

NASA Astrophysics Data System (ADS)

Espinosa Rodriguez, Tulia

tribocorrosion processes. The formation of a coating layer on magnesium alloys from phosphonate imidazolium ionic liquids by immersion and by chronoamperometry has been described. The new coatings reduce the abrasive wear in the magnesium-aluminium alloy but they are not effective in the magnesium-zinc alloy, which prevent the formation of continuous coatings. Los liquidos ionicos son sales liquidas a temperatura ambiente o bajas temperaturas que presentan excelentes propiedades fisico-quimicas. En el presente trabajo se estudian como lubricantes en problemas tribologicos complejos como la lubricacion de metales contra si mismos, el desarrollo de lubricantes base agua y de nuevas superficies autolubricadas. Cuando no es posible reducir la friccion y desgaste mediante lubricacion, como en las aleaciones de magnesio, los liquidos ionicos se han estudiado como precursores de recubrimientos protectores. Se han determinado las interacciones superficiales y los procesos de corrosion sobre cobre y sobre acero con diferentes liquidos ionicos proticos y aproticos para desarrollar nuevos lubricantes y aditivos. En el contacto cobre/cobre, excepto el liquido ionico protico derivado del oleato, todos los liquidos ionicos estudiados presentan mejor comportamiento tribologico que el lubricante comercial Polialfaolefina 6. En el contacto acero/zafiro, los nuevos liquidos ionicos proticos son buenos lubricantes cuando se utilizan en estado puro, y, como aditivos en agua, generan peliculas adsorbidas sobre la superficie del metal reduciendo la friccion y el desgaste tras la evaporacion del agua. Para evitar el periodo de alta friccion inicial en presencia de agua, se han generado peliculas superficiales de liquido ionico sobre el acero en condiciones estaticas. El mejor comportamiento lubricante tanto en el contacto cobre/cobre como en el contacto acero/zafiro se obtiene para el liquido ionico protico derivado del anion adipato, con dos grupos carboxilicos. Las interacciones de los grupos

Laboratory evaluation of Vectobac as against Aedes aegypti in Monterrey, Nuevo León, Mexico.

PubMed

Ponce G, Gustavo; Flores, Adriana E; Badii, Mohammad H; Rodríguez-Tovar, M Luisa; Fernández-Salas, Ildefonso

2002-12-01

Intensive use of the organophosphate insecticide malathion against adults and temephos against larvae of Aedes aegypti in Mexico over the past 30 years has led to problems requiring the use of new larvicides. Toward this objective, Bacillus thuringiensis var. israelensis (Bti), a target-specific and environmentally safer control agent, was evaluated. Laboratory bioassays were done to determine the susceptibility of 2nd- and 3rd-stage larvae of Ae. aegypti to Vectobac 12 AS (aqueous suspension, 600 ITU/mg). A median lethal concentration of 0.0104 ppm and a 95% lethal concentration of 0.18 ppm were determined after 24 h of exposure to the agent. The values obtained were adjusted for field application and were further tested in the field by the State of Nuevo León, Mexico Vector Control Program. Suspensions of Bti were poured into pipe-water trucks and transferred to domestic 200-gal metal water drums. Larval populations were reduced during a 2-week study period. However, residents complained about a fine dusty film on the water surface. Nevertheless, these results are promising for future Bti field applications.

[Quality of the Early Cervical Cancer Detection Program in the State of Nuevo León].

PubMed

Salinas-Martínez, A M; Villarreal-Ríos, E; Garza-Elizondo, M E; Fraire-Gloria, J M; López-Franco, J J; Barboza-Quintana, O

1997-01-01

To determine the quality of the Early Cervical Cancer Detection Program in the state of Nuevo León. A random selection of 4791 cytologic reports were analyzed, emitted by the State Ministry of Health, the University Hospital and the Mexican Institute for Social Security early cervical cancer detection modules. Pap tests of women with hysterectomy, current pregnancy, menopause or positive result were excluded. Quality was measured with previously defined standards. Analysis included, besides univariate statistics, tests of significance for proportions and means. The quality of the program was fairly satisfactory at the level of the State. The quality of the sampling procedure was low; 39.9% of the tests contained endocervical cells. Quality of coverage was low; 15.6% were women 25+years with first time Pap test. Quality of opportunity was high; 8.5 +/- 7 weekdays between the date of the pap smear and the interpretation date. Strategies are needed to increase the impact of the state program, such as improving the sampling procedure and the coverage quality levels.

Desarrollo de un instrumento para medir percepciones sobre el contexto de construccion del conocimiento cientifico de estudiantes universitarios de nuevo ingreso

NASA Astrophysics Data System (ADS)

Garcia-Ramirez, Jaime Antonio

En esta investigacion, se desarrollo un instrumento que permite medir percepciones relacionadas al contexto de constriccion del conocimiento cientifico. Se examinaron instrumentos existentes y se encontro que el VOSTS (Views on science, technology, and society), instrumento desarrollado empiricamente en Canada por Aikenhead, Ryan y Fleming, podia traducirse y validarse en el contexto cultural puertorriqueno. El instrumento es extenso, consta de 113 reactivos, cada uno con una premisa basica relacionada a la tematica ciencia, tecnologia y sociedad y un numero de alternativas relacionadas a la premisa que oscila entre siete y trece. Se delimito su utilizacion a los quince reactivos identificados por los autores como relacionados a la construccion social del conocimiento cientifico. Metodologicamente, se procedio a utilizar el modelo de adaptacion intercultural, que permite que el instrumento desarrollado satisfaga las dimensiones de equivalencia semantica, de contenido, tecnica, de criterio y conceptual, atemperado asi al instrumento original. Se cumplio con este proposito mediante la traduccion de la version original en ingles al espanol y viceversa. Se utilizaron comites para examinar la traduccion y la retro-traduccion del instrumento. Se realizo una prueba piloto con estudiantes universitarios de nuevo ingreso, utilizando el instrumento traducido para asegurar su intelegibilidad. La confiabilidad del instrumento se determino mediante la intervencion de un panel de expertos quienes clasificaron las distintas posiciones dentro de cada reactivo en: realista, con merito e ingenua; se transformaron estas opciones en valores numericos lo que permitio establecer una escala Likert para cada una. Se suministro el instrumento a una muestra de estudiantes universitarios de nuevo ingreso con caracteristicas similares a las de la poblacion puertorriquena en cuanto a ejecucion en las pruebas de aptitud verbal y matematica del College Board. Los resultados de sus contestaciones

[Prevalence of hymenoptera sting allergy in veterinary medicine students from Monterey, Nuevo Leon, Mexico].

PubMed

Arias Cruz, Alfredo; Monsiváis Toscano, Gina; Gallardo Martínez, Gabriela; González Díaz, Sandra Nora; Galindo Rodríguez, Gabriela

2007-01-01

The reported prevalence of allergic systemic reactions to hymenoptera venom occur in up to 3.3% and large local reactions occur in 17% in the general population. To investigate the prevalence of hymenoptera sting allergy in a group of veterinary medicine students from Monterrey, Nuevo Leon, Mexico. A transverse and observational study was done with 64 students of veterinary medicine. We conducted a questionnaire about the students' history of insect allergy and atopy. Skin test with allergenic extracts of bee and ant were practiced to all subjects. We performed aeroallergen skin prick test to the subjets with suspected atopy. Students age ranged from 17 to 25 years (mean 20.2) and 37 were males. Twenty students (31.3%) had clinical history of atopy and positive skin tests to aeroallergens. On the other hand, 5 students (7.8%), including 2 atopic, had suffered large local reactions, but none of them had suffered systemic reactions. Bee and ant skin tests were positive in 15.6% and 31.3% of the students respectively. There was no difference in the prevalence of hymenoptera allergy between atopic and non atopic subjects (p < 0.05). Further, the frequency of atopy in subjects with positive skin tests for bee and ant was 50%. The prevalence of large local reactions and hymenoptera sensitization found in this group was similar to that found in other epidemiologic studies.

Population data of 24 STRs in Mexican-Mestizo population from Monterrey, Nuevo Leon (Northeast, Mexico) based on Powerplex(®) Fusion and GlobalFiler(®) kits.

PubMed

Ramos-González, Benito; Aguilar-Velázquez, José Alonso; Chávez-Briones, María de Lourdes; Delgado-Chavarría, Juan Ramón; Alfaro-Lopez, Elizabeth; Rangel-Villalobos, Héctor

2016-03-01

The STR loci included into new commercial human identification kits compels geneticists estimating forensic parameters for interpretation purposes in forensic casework. Therefore, we studied for the first time in Mexico the GlobalFiler(®) and Powerplex(®) Fusion systems in 326 and 682 unrelated individuals, respectively. These individuals are resident of the Monterrey City of the Nuevo Leon state (Northeast, Mexico). Population data from 23 autosomal STRs and the Y-STR locus DYS391 are reported and compared against available STR data from American ethnic groups and the unique Mexican population studied with Powerplex(®) Fusion. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

Antibody detection against Borrelia burgdorferi in horses located in the suburban areas of Monterrey, Nuevo León.

PubMed

Salinas-Mélendez, J A; Galván de la Garza, S; Riojas-Valdés, V M; Wong González, A; Avalos-Ramírez, R

2001-01-01

The aim of the present study was to determine the presence of Borrelia burgdorferi antibodies in horses from the metropolitan area of Monterrey, Nuevo León, México. Blood serum was obtained from a total of 100 horses residing at different counties in the area. From each animal data was obtained on age, sex, county of residence, presence of ectoparasites and clinical signs. All sera samples were analyzed by indirect immunofluoresence and the sera that resulted positive to this test was analyzed by Western blot. The serological test yielded 34 positive sera at 1:64 dilution, and from them 6 were positive at 1:128 dilution, 3 at 1:256, and only one at 1:512. Confirmation of the infection by Western blot was obtained only in the sample positive at the 1:512 dilution. These results shown a low frequency of seropositivity to B. burgdorferi of the horses in the area, confirming previous studies indicating that in northeast Mexico Lyme disease is present in different animal species.

BIOÉTICA EN NICARAGUA

PubMed Central

Gonzálezy, Armando Ulloa; Monge, Melba de la Cruz Barrantes

2009-01-01

Este trabajo describe la situación de la bioética en Nicaragua, caracterizando las circunstancias y el contexto de las actividades de educación médica y las unidades prestadoras de servicios de salud. El desarrollo de un nuevo modelo de atención integral en salud, la implementación de políticas de salud que garanticen a la población el mayor acceso y gratuidad a los servicios, y los cambios acontecidos en los cuidados médicos, debidos en parte al reconocimiento creciente de una mayor autonomía de los pacientes y al uso creciente de nuevas tecnologías médicas, hace que se presenten algunas limitantes y dilemas en las unidades asistenciales y entre el personal de salud. La bioética en Nicaragua tiene un desarrollo incipiente: no está institucionalizada ni se han previsto los mecanismos formales que permitan resolver los problemas éticamente complejos, por lo tanto, constituye un gran reto por parte de las instituciones educativas y rectoras de la salud. PMID:20352016

Randomized Controlled Trial of Nuevo Amanecer: A Peer-delivered Stress Management Intervention for Spanish-speaking Latinas with Breast Cancer

PubMed Central

Nápoles, Anna María; Santoyo-Olsson, Jasmine; Ortiz, Carmen; Gregorich, Steven; Lee, Howard E.; Duron, Ysabel; Graves, Kristi; Luce, Judith A.; McGuire, Peggy; Díaz-Méndez, Marynieves; Stewart, Anita L.

2014-01-01

Background Latinas with breast cancer suffer symptom and psychosocial health disparities. Effective interventions have not been developed for or tested in this population. Purpose We describe community-based participatory research methods used to develop and implement the Nuevo Amanecer program, a culturally tailored, peer-delivered cognitive-behavioral stress management intervention for low-income Spanish-speaking Latinas with breast cancer, and unique considerations in implementing a randomized controlled trial to test the program in community settings. Methods We applied an implementation science framework to delineate the methodological phases used to develop and implement the Nuevo Amanecer program and trial, emphasizing community engagement processes. Results In phase 1, we established project infrastructure: academic and community Co-Principal Investigators, community partners, community advisory board, steering committee, and funding. In phase 2, we identified three program inputs: formative research, a community best practices model, and an evidence-based intervention tested in non-Latinas. In phase 3, we created the new program by integrating and adapting intervention components from the three sources, making adaptations to accommodate low-literacy, Spanish language, cultural factors, community context, and population needs. In phase 4, we built community capacity for the program and trial by training field staff (recruiters and interventionists embedded in community sites), compensating field staff, and creating a system for identifying potential participants. In phase 5, we implemented and monitored the program and trial. Engaging community partners in all phases has resulted in a new, culturally tailored program that is suitable for newly diagnosed Latinas with breast cancer and a trial that is acceptable and supported by community and clinical partners. Lessons Learned Engagement of community-based organizations and cancer survivors as research

Airborne pollen of Carya, Celtis, Cupressus, Fraxinus and Pinus in the metropolitan area of Monterrey Nuevo Leon, Mexico.

PubMed

Rocha-Estrada, Alejandra; Alvarado-Vázquez, Marco Antonio; Torres-Cepeda, Teresa Elizabeth; Foroughbakhch-Pournavab, Rahim; Hernández-Piñero, Jorge Luis

2008-01-01

The concentration of pollen grains in the atmosphere over the metropolitan area of Monterrey, Nuevo Leon, Mexico, was analyzed throughout a year from March 2003-February 2004, focused on the genus Carya, Celtis, Cupressus, Fraxinus and Pinus owing to their interest as etiological pollinosis agents in diverse regions of the world. A 7-day Hirst type volumetric spore and pollen trap was located on a building roof of the city at 15 m from ground level for continuous sampling. The total quantity of pollen recorded for the study period was 21,083 grains/m(3), corresponding to 49.75 % of the taxa of interest. February and March were the months with higher pollen amounts in the air with 7,525 and 2,781 grains/m(3), respectively, and amounted to 49 % of total year through pollen. Fraxinus was the genus which contributed to the largest amount of pollen with 28 % of total grains (5,935 grains/m(3)) followed by Cupressus with 13 % (2,742 grains/ m(3)). Celtis, Pinus and Carya contributed with 5.3 % , 2.7 % , and 0.6 % of total pollen, respectively. These results indicate that Fraxinus and Cupressus are present in the area in sufficient quantity to indicate likely involvement in the origin of allergic disorders in the human population.

Foco Nasmyth para el telescopio 2,15mts. de CASLEO

NASA Astrophysics Data System (ADS)

Casagrande, A. R.

En principio, este proyecto intenta lograr el mayor aprovechamiento posible del instrumental que se dispone, buscando la manera de optimizar y hacer más eficiente el servicio que brinda el CASLEO a la comunidad astronómica. El mismo consiste en utilizar dispositivos ya existentes en el telescopio, y darle una utilidad. Tal es el caso del camino óptico destinado al foco Coude. Si tenemos en cuenta que disponemos de un tercer espejo Coude, con todos sus mecanismos automatizados, (actualmente sin uso), una distancia apropiada del plano focal, el espacio y el lugar físico necesario para instalar un periférico, es posible la habilitación de un foco Nasmyth en el telescopio 2,15mts. El hecho de contar con este nuevo foco, redundará en importantes beneficios. En primer lugar, posibilitará la observación, casi simultánea, con dos instrumentos. Otro aspecto a tener en cuenta, es que disminuirá el frecuente cambio del instrumental periférico, motivo este que degrada su ideal puesta a punto. Por último, también de interés, es de destacar su escaso costo de ejecución.

Turning scientific approaches into practical conservation actions: the case of Comunidad Indigena de Nuevo San Juan Parangaricutiro, Mexico.

PubMed

Velázquez, A; Bocco, G; Torres, A

2001-05-01

Optimum natural resource management and biodiversity conservation are desirable goals. These, however, often exclude each other, since maximum economic benefits have promoted drastic reductions in biodiversity throughout the world. This dilemma confronts local stakeholders, who usually go for maximizing economic inputs, whereas other social (e.g., academic) sectors are favor conservation practices. In this paper we describe the way two scientific approaches--landscape and participatory research--were used to develop sound and durable land use scenarios. These two approaches included expert knowledge of both social and environmental conditions in indigenous communities. Our major emphasis was given to detect spatially explicit land use scenarios and capacity building in order to construct a decision support system operated by stakeholders of the Comunidad Indigena de Nuevo San Juan Parangaricutiro in Mexico. The system for decision-making was fed with data from inventories of both abiotic and biotic biodiversity components. All research, implementation, and monitoring activities were conducted in close collaboration with members of the indigenous community. As a major result we obtained a number of forest alternative uses that favor emerging markets and make this indigenous community less dependent on a single market. Furthermore, skilled members of the community are now running the automated system for decision-making. In conclusion, our results were better expressed as products with direct benefits in local livelihoods rather than pure academic outputs.

Geo-social and health disparities among persons with disabilities living in Monterrey, Nuevo Leon and Dallas, Texas.

PubMed

Nikolova, Silviya P; Small, Eusebius; Campillo, Claudia

2015-07-01

In low and high income countries alike, disability exacerbates social, economic, and health disparities, in spite of their differences. This study seeks to identify factors that predict the circumstances people with disabilities face, including poverty. A cross-sectional study design was employed using census track level data for the cities of Monterrey, Nuevo Leon, and Dallas, Texas, from Mexico 2010 and USA 2000 census data collections. Two methods, spatial autocorrelation and geographically weighted regression were used to identify spatial patterns of disability and to explore the relation between disability and context-specific socio-demographic factors. Results indicated that people with disabilities living below the poverty line experience high segregation levels in the semi-central zones of Dallas. In Monterrey, people with disabilities clustered in central areas of the city. A Geographically Weighted Regression (GWR) from both data analyses reported high goodness of fit (R ≥ 0.8 for Dallas data and R ≥ 0.7 for Monterrey data, respectively) and predictability of disability prevalence when social disadvantage factors such as unemployment, housing insecurity, household living conditions, and lack of education were present. The divergent and sometimes conflicting trends in practices and policies addressing disability in low and high income environments renders a reexamination of the framework of disability. An understanding of local characteristics joins a grounded socio-cultural understanding of the various contexts that shape location-based social networks and political decisions in providing such an analysis. Copyright © 2015 Elsevier Inc. All rights reserved.

Surveillance of methicillin-resistant Staphylococcus aureus causing nosocomial infections in five medical centers of Monterrey, Nuevo León, México from 2005-2009.

PubMed

Velazquez-Meza, Maria Elena; Hernández-Salgado, Margarita; Contreras-Cordero, Juan F; Pérez-Cortes, Patricia; Villarreal-Treviño, Licet

2013-10-01

Staphylococcus aureus is a principal cause of human bacterial infection worldwide. The dissemination of antibiotic resistance among S. aureus strains is very import in the treatment of Staphylococcal infections. We undertook this study to identify methicillin-resistant Staphylococcus aureus (MRSA) clones responsible for nosocomial infection in five medical centers in Monterrey, Nuevo León (N.L.), México from 2005-2009. One hundred ninety MRSA strains collected from 2005-2009 from five hospitals affiliated with the Instituto Mexicano del Seguro Social (IMSS) in Monterrey, N.L., México were characterized by antimicrobial susceptibility, pulsed field gel electrophoresis (PFGE) and Staphylococcal Cassette Chromosome mec (SCCmec) typing. Only one clone was present in the five hospitals (clone C); this clone is strongly associated with the New York-Japan clone (SCCmec II) with a broad resistance profile. This study clearly documented the high ability for dissemination and the persistence of the New York-Japan clone in these centers. Copyright © 2013 IMSS. Published by Elsevier Inc. All rights reserved.

The association of Aedes aegypti and Ae. albopictus in Allende, Nuevo León, Mexico.

PubMed

Mercado-Hernandez, Roberto; Aguilar-Gueta, Juan de Dios; Fernandez-Salas, Ildefoso; Earl, Paul R

2006-03-01

The recent appearance of Aedes Stegomyia albopictus (Skuse) in Nuevo León (NL) worries health officials. It is a vector of dengue fever in Asia and is more resistant to lower temperatures than Ae. aegypti. The objective of this study was to learn about some ecological parameters of Ae. albopictus and their association with Ae. aegypti, and other culicids in Allende, NL, Mexico, during 1999. Allende is a small town close to metropolitan Monterrey, which has 4 million inhabitants. The design was random with monthly sampling of 175 ovitraps. Chi-square analyses were performed with data of presence, absence, frequency, and relative abundances. During the study, the species Culex tarsalis (Coquillet), Cx. thriambus (Dyar), Cx. pipiens (Linnaeus), Cx. coronator (Dyar and Knab), Ae. albopictus, Ae. aegypti, Toxorhynchites rutilus (Coquillet), and Ae. triseriatus (Say) were found. April is the month for large numbers of mosquito species. September had the highest populations in positive ovitraps (66.67%), followed by July (63.27% of traps). Aedes aegypti was the most abundant (65.13%), followed by Ae. albopictus (19.71%). Both Ae. albopictus and Ae. aegypti were found from April until December. Aedes aegypti was more abundant than Ae. albopictus, except in August, when they were similar (chi2 = 0.197, P < 0.05). We found significant association between the presence of both species for every study month (chi2 = 9.837, P < 0.05), with a contingency coefficient of 0.247. September and November were the months having the most mosquitoes in this association. Only considering Ae. albopictus, more were found in ovitraps in July (34.6%), followed by September (33.3%). However, its presence was not significant throughout the year. Of 2 zones, in town and at the river, prevalence indicated that Ae. albopictus preferred the river. This mosquito is in its establishment phase in this area and requires further studies.

[Metazoan parasites of Micropterus salmoides (Centrarchidae: Perciformes) from reservoirs of Nuevo León, México and their association with condition factor and gender].

PubMed

Galaviz S, Lucio; Escobar G, Baldemar; Iruegas B, Francisco Javier; Molina, Zinnia Judith

2016-06-01

The largemouth bass Micropterus salmoides is a very valuable fish species for aquaculture and sport fishing; however, there are no systematic studies on fish metazoan parasites in Mexico. The main objective of the present study was to describe the prevalence, abundance, and intensity of M. salmoides metazoan parasites, and their association with fish condition factor and gender. The sample size was composed by 672 hosts, collected between 2011-2013 from the following reservoirs of Nuevo Leon, México: Rodrigo Gómez dam (“La Boca”, LB), Cuchillo-Solidaridad dam (CS), Salinillas lagoon (LS), Mariano Escobedo dam (“Sombreretillo”, S), and José López Portillo dam (“Cerro Prieto”, CP). Living fish were transported to the laboratory; sizes and weights were then recorded to calculate the Fulton condition factor (k). If possible, gender was also recorded. Parasites were detected under stereoscopy, recollected and preserved by traditional techniques. Statistical analysis of association between parasitic load, gender, and Fulton condition factor were calculated, using the X2 and the Student-t tests. Results showed that 12 different metazoans were identified, two flukes (Posthodiplostomum minimum centrarchi and Phyllodistomum pearsei), one tapeworm (Proteocephalus ambloplitis), three roundworms (Contracaecum sp., Spinitectus carolini and Philometra nodulosa), two acantocephalan (Neoechinorhynchus cylindratus and Arhythmorhynchus sp.), one leech (Myzobdella moorei), and three copepods (Ergasilus versicolor; Ergasilus arthrosis and Ergasilus cerastes). HSD Tukey test showed that infected fish from LB were significantly different than LS, CS, CP, and S (P<0.05). Parasites most commonly collected in all five locations were P. m. centrarchi, Contracaecum sp. and E. versicolor. The frequency of P. m. centrarchi was highly significant (P<0.001) than other parasites; furthermore, this parasite showed the highest prevalence (97.5 %), abundance (10.12-83.6), and

Infection levels and seasonality of monogeneans in the largemouth bass Micropterus salmoides (Perciformes: Centrarchidae) from Nuevo León, Mexico.

PubMed

Galaviz-Silva, L; Iruegas-Buentello, F J; Escobar-González, B; Molina-Garza, Z J

2016-11-01

Largemouth bass, Micropterus salmoides, is a native fish species with special importance for sport fishing competitions in Nuevo León, Mexico. However, no study has investigated the parasitic fauna of M. salmoides, and no reports are available on monogenean parasites in this fish species. Therefore, we described the monogenean parasites of M. salmoides and the effects of season and fish condition factor in five reservoirs: La Boca (LB), El Cuchillo-Solidaridad (CS), Sombreretillo (S), Laguna Salinillas (LS) and Cerro Prieto (CP). The monogeneans infecting M. salmoides were Clavunculus unguis and Acolpenteron ureteroecetes (collected in all localities), as well as Syncleithrium fusiformis, Haplocleidus furcatus, Clavunculus bifurcatus and Urocleidus principalis (CS). Clavunculus unguis had the highest prevalence in fish from all reservoirs. The abundance of monogeneans was generally greater in late spring to autumn than in winter. Although season was not correlated with abundance (r s = 0.0934, P <  0.0154), the months of highest temperature (from May to September) were positively correlated with parasite abundance. A significant association was observed between fish condition factor and the presence of monogeneans (P <  0.05), except for A. ureteroecetes. Our findings include five new geographic records for C. unguis, S. fusiformis, H. furcatus and C. bifurcatus.

[Impact of perinatal mortality in multiple pregnancies over total perinatal mortality in a hospital in Monterrey, Nuevo León].

PubMed

Hernández-Herrera, Ricardo Jorge; Ramírez-Sánchez, Luis Fernando

2010-07-01

The incidence of multiple pregnancies has increased on the last decade resulting in a rise of premature and underweight newborns infants, with increase of the perinatal morbidity and mortality. To determine the impact of perinatal mortality of multiple pregnancies in the total perinatal mortality. perinatal mortality rate of multiple pregnancies treated in the Unidad Médica de Alta Especialidad No. 23, Monterrey, Nuevo León (Mexico) were analized, from 2002 to 2008. The prevalence of multiple pregnancies, the rate of premature births, the incidence of low-birth weight products and perinatal mortality was estimated. The difference between overall mortality and multiple pregnancy rate was measured by chi2. Of the 144,114 births, there were 1076 (0.8%) fetal deaths and 1,617 (1.10%) neonatal deaths. There were 110 high-order fetal pregnancies (more than three fetuses): 92 triplets, 14 quadruplets, 3 quintuplets and 1 sextuplet, producing a total of 353 newborns. Multiple pregnancies represent 2.8% (59/2093) of the total perinatal mortality (p = 0.3). 79.9% (1674/2093) of the total perinatal mortality were newborns weighing less than 2500 g. In the group of multiple pregnancies, all perinatal deaths occurred in products weighing less than 2500 g. The perinatal mortality of multiple pregnancies does not impact significantly overall perinatal mortality.

[HCV and HBV seropositivity in university students of the State of Nuevo Leòn, Mexico].

PubMed

Flores-Castañeda, M S; García-Méndez, B L; Tijerina-Menchaca, R

1996-01-01

Viral hepatitis is a contagious disease. Patients infected with hepatitis B virus (HBV) or hepatitis C virus (HCV), may be either chronically symptomatic or asymptomatic, and suffer cirrhosis and high risk of hepatic carcinoma. Asymptomatic carriers of HBV surface antigen (HBs-Ag) or with anti-HCV antibodies are potentially infectious, and therefore a risk to public health. This work seeks to establish the frequency of seropositivity for HBs-Ag and anti-HCV antibodies in a population of 774 newly accepted students of the Medical School of the Autonomous University of Nuevo Leon, whose average age was 18 years. Second generation ELISA test were used to screen for HBs-Ag and anti-HCV antibodies. HBs-Ag was confirmed by a neutralization test and anti-HCV antibodies were confirmed by a RIBA test. Three sera were positive for HBs-Ag by ELISA and only one serum (0.13% of analyzed samples) was confirmed by the neutralization technique. On the other hand 12 sera were positive for anti-HCV antibodies by ELISA, and eight of these were confirmed by RIBA (1.03% of the analyzed samples). Intensive reactivity bands were found in two sera, and weak reactivity bands were found in six sera. ELISA screening for anti-HCV antibodies showed 0.5% of false positives. This study shows that the frequency of anti-HCV antibodies is 7.95% times higher than that found for HBs-Ag. All seropositive patients were asymptomatic and potentially infective. This demonstrates the need to routinely screen for HBs-Ag and anti-HCV antibodies to establish the prevalence of these diseases in our area.

[Perinatal mortality at Hospital de Ginecoobstetricia No. 23 of Monterrey, Nuevo León, 2002-2006 period].

PubMed

Gutiérrez Saucedo, María Elena; Hernández Herrera, Ricardo Jorge; Luna García, Sergio Arturo; Flores Santos, Roberto; Alcalá Galván, Luis Gerardo; Martínez Gaytán, Victoria

2008-05-01

Perinatal period begins at 22 gestational weeks and ends seven days after birth. Perinatal mortality is an important quality indicator of the obstetric and pediatric care available, and representative of the population's health service. To know fetal, early neonatal, and perinatal dead rates, and them main mortality causes. Descriptive and retrospective study at IMSS's no. 32 UMAE (Monterrey, Nuevo León, México), from January 2002 to December 2006. Mortality rates during fetal and perinatal, or neonatal periods, were estimated per 1,000 births or 1,000 live born, respectively. There were 1,681 deaths: 747 stillbirths and 934 neonatal. Two hundred and nineteen (29.3%) stillbirths had 22 to 27 gestational weeks, and 528 (70.6%) had 28. Three hundred and sixty neonatal deaths (38.5%) occurred before 27th gestational week, 320 (34.2%) between weeks 28th and 35th, and 254 (27.1%) after 36 weeks of pregnancy. Seven hundred and sixty four neonates died within 0 to 6 days of life, and 170 (18%) between seventh to 28th days of life. Fetal, neonatal, early neonatal, and late neonatal mortality rates were 7.2 in 1,000 births, 9.08 in 1,000 live born, 7.42 in 1,000 live born, and 1.65 in 1,000 births, respectively, and overall perinatal mortality rate was 14.58 in 1,000 births. Stillbirth, early neonatal, and perinatal mortality rates of this study were under national mean. Main mortality causes (70%) were congenital defects and prematurity.

Interferon Gamma-Based Detection of Latent Tuberculosis Infection in the Border States of Nuevo Leon and Tamaulipas, Mexico

PubMed Central

Oren, Eyal; Alatorre-Izaguirre, Gabriela; Vargas-Villarreal, Javier; Moreno-Treviño, Maria Guadalupe; Garcialuna-Martinez, Javier; Gonzalez-Salazar, Francisco

2015-01-01

Nearly one-third of the world’s population is infected with latent tuberculosis (LTBI). Tuberculosis (TB) rates in the border states are higher than national rates in both the US and Mexico, with the border accounting for 30% of total registered TB cases in both countries. However, LTBI rates in the general population in Mexican border states are unknown. In this region, LTBI is diagnosed using the tuberculin skin test (TST). New methods of detection more specific than TST have been developed, although there is currently no gold standard for LTBI detection. Our objective is to demonstrate utility of the Quantiferon TB gold In-Tube (QFT-GIT) test compared with the TST to detect LTBI among border populations. This is an observational, cross-sectional study carried out in border areas of the states of Nuevo Leon and Tamaulipas, Mexico. Participants (n = 210) provided a TST and blood sample for the QFT-GIT. Kappa coefficients assessed the agreement between TST and QFT-GIT. Participant characteristics were compared using Fisher exact tests. Thirty-eight percent of participants were diagnosed with LTBI by QFT-GIT. The proportion of LTBI detected using QFT-GIT was almost double [38% (79/210)] that found by TST [19% (39/210)] (P < 0.001). Concordance between TST and QFT-GIT was low (kappa = 0.37). We recommend further studies utilizing the QFT-GIT test to detect LTBI among border populations. PMID:26484340

Interferon Gamma-Based Detection of Latent Tuberculosis Infection in the Border States of Nuevo Leon and Tamaulipas, Mexico.

PubMed

Oren, Eyal; Alatorre-Izaguirre, Gabriela; Vargas-Villarreal, Javier; Moreno-Treviño, Maria Guadalupe; Garcialuna-Martinez, Javier; Gonzalez-Salazar, Francisco

2015-01-01

Nearly one-third of the world's population is infected with latent tuberculosis (LTBI). Tuberculosis (TB) rates in the border states are higher than national rates in both the US and Mexico, with the border accounting for 30% of total registered TB cases in both countries. However, LTBI rates in the general population in Mexican border states are unknown. In this region, LTBI is diagnosed using the tuberculin skin test (TST). New methods of detection more specific than TST have been developed, although there is currently no gold standard for LTBI detection. Our objective is to demonstrate utility of the Quantiferon TB gold In-Tube (QFT-GIT) test compared with the TST to detect LTBI among border populations. This is an observational, cross-sectional study carried out in border areas of the states of Nuevo Leon and Tamaulipas, Mexico. Participants (n = 210) provided a TST and blood sample for the QFT-GIT. Kappa coefficients assessed the agreement between TST and QFT-GIT. Participant characteristics were compared using Fisher exact tests. Thirty-eight percent of participants were diagnosed with LTBI by QFT-GIT. The proportion of LTBI detected using QFT-GIT was almost double [38% (79/210)] that found by TST [19% (39/210)] (P < 0.001). Concordance between TST and QFT-GIT was low (kappa = 0.37). We recommend further studies utilizing the QFT-GIT test to detect LTBI among border populations.

PubMed

Spitale, Luis Santos; Pizzi, Rogelio Daniel; Tomas, Axel; Paez Rearte, Mirtha Gladys; Pizzi, Hugo Luis

2017-09-08

RESUMENSe informan sesenta y cinco casos de enterobiasis del apéndice cecal por Enterobius vermicularis u Oxiurus vermicularis. La enterobiasis es una parasitosis cosmopolita 5, 8,13 y frecuente. Es útil establecer si puede ser causa de apendicitis y los mecanismos involucrados. Según la literatura clásica, E. vermicularis, no es agente causal de apendicitis per se, pero permite la reproducción de los gérmenes que infiltran la pared y producen apendicitis.5, 9,10 El propósito del trabajo es informar la prevalencia de E. vermicularis en apendicitis quirúrgicas y la anatomopatología para deducir una relación causal. Informamos una muestra de 2000 piezas quirúrgicas de apéndices extraídos (1992-2003) en el Hospital de Urgencias de la ciudad de Córdoba, Argentina. Sobre un total de 2000 piezas, observamos 65 casos de enterobiasis apendicular; en 60 casos (3,25 %) no hubo histopatología propia de inflamación aguda (apéndice cecal anodino). En los 5 casos restantes, (0,25 %) observamos coexistencia de parásitos en la luz apendicular, napas de infiltrado inflamatorio agudo transmural (apendicitis aguda) y fecalitos, lo que apoyaría la etiopatogenia de tipo obstructivo que lleva al cuadro quirúrgico. La localización apendicular de Enterobius vermicularis favorecería la formación de fecalitos en la luz y la proliferación de gérmenes en la pared que llevaría a la apendicitis. Reportes señalan que la infección parasitaria constituye un porcentaje de las etiologías en apendicitis y los fecalitos son el desencadenante más común, pudiendo estar implicados en su formación algunos parásitos (Enterobius vermicularis), aunque este porcentaje es mínimo. 9, 10, 15,17.

Extraction of water and solutes from argillaceous rocks for geochemical characterisation: Methods, processes and current understanding

NASA Astrophysics Data System (ADS)

Sacchi, Elisa; Michelot, Jean-Luc; Pitsch, Helmut; Lalieux, Philippe; Aranyossy, Jean-François

2001-01-01

This paper summarises the results of a comprehensive critical review, initiated by the OECD/NEA "Clay Club," of the extraction techniques available to obtain water and solutes from argillaceous rocks. The paper focuses on the mechanisms involved in the extraction processes, the consequences on the isotopic and chemical composition of the extracted pore water and the attempts made to reconstruct its original composition. Finally, it provides some examples of reliable techniques and information, as a function of the purpose of the geochemical study. Résumé. Cet article résume les résultats d'une synthèse critique d'ensemble, lancée par le OECD/NEA "Clay Club", sur les techniques d'extraction disponibles pour obtenir l'eau et les solutés de roches argileuses. L'article est consacré aux mécanismes impliqués dans les processus d'extraction, aux conséquences sur la composition isotopique et chimique de l'eau porale extraite et aux tentatives faites pour reconstituer sa composition originelle. Finalement, il donne quelques exemples de techniques fiables et d'informations, en fonction du but de l'étude géochimique. Resúmen. Este artículo resume los resultados de una revisión crítica exhaustiva (iniciada por el "Clay Club" OECD/NEA) de las técnicas de extracción disponibles para obtener agua y solutos en rocas arcillosas. El artículo se centra en los mecanismos involucrados en los procesos extractivos, las consecuencias en la composición isotópica y química del agua intersticial extraída, y en los intentos realizados para reconstruir su composición original. Finalmente, se presentan algunos ejemplos de técnicas fiables e información, en función del propósito del estudio geoquímico.

Distribution of ixodid ticks on dogs in Nuevo León, Mexico, and their association with Borrelia burgdorferi sensu lato.

PubMed

Galaviz-Silva, Lucio; Pérez-Treviño, Karla Carmelita; Molina-Garza, Zinnia J

2013-12-01

This study aimed to document the geographic distribution of Ixodes tick species in dogs and the prevalence of Borrelia burgdorferi s.l. in adult ticks and blood samples by amplification of the ospA region of the B. burgdorferi genome. The study area included nine localities in Nuevo León state. DNA amplification was performed on pools of ticks to calculate the maximum likelihood estimation (MLE), and the community composition (prevalence, abundance, and intensity of infestation) was recorded. A total of 2,543 adult ticks, representing four species, Rhipicephalus sanguineus, Dermacentor variabilis, Rhipicephalus (Boophilus) annulatus, and Amblyomma cajennense, were recorded from 338 infested dogs. Statistically significant correlations were observed between female dogs and infestation (P = 0.0003) and between R. sanguineus and locality (P = 0.0001). Dogs sampled in Guadalupe and Estanzuela were positive by PCR (0.9 %) for B. burgdorferi. Rhipicephalus sanguineus had the highest abundance, intensity, and prevalence (10.57, 7.12 and 94.6, respectively). PCR results from 256 pools showed that four pools were positive for D. variabilis (1.6 %), with an MLE of 9.2 %; nevertheless, it is important to consider that in the area under examination probably other reservoir hosts for D. variabilis and B. burgdorferi are present that, very likely, play a much more important role in the ecology of Lyme borreliosis than dogs, which could be considered in future studies.

Self-esteem, perceived self-efficacy, consumption of tobacco and alcohol in secondary students from urban and rural areas of Monterrey, Nuevo León, México.

PubMed

Martínez Maldonado, Raúl; Pedrão, Luiz Jorge; Alonso Castillo, María Magdalena; López García, Karla Selene; Oliva Rodríguez, Nora Nely

2008-01-01

This study aimed to know the differences, if any, in the consumption of tobacco and alcohol among adolescents from urban and rural areas, and if self-esteem and self-efficacy are related to the consumption in these two groups of adolescents from secondary schools in urban and rural areas of Nuevo León México, from January to June in 2006. The study was based on the theoretical concepts of self-esteem, perceived self-efficacy and consumption of alcohol and tobacco. The design was descriptive and correlational with a sample of 359 students. A substantial difference was found in the consumption of tobacco among secondary students from urban and rural areas (U= 7513.50, p = .03). The average consumption in urban area was higher (average chi = .35) than in the rural area (average chi = .14). A negative and significant relation was found between the quantity of drinks consumed on a typical day and self-esteem (r s = - .23, p <.001), as well as for the quantity of cigarettes consumed on a typical day (r s = - .20, p <.001).

Detection of West Nile virus-specific antibodies and nucleic acid in horses and mosquitoes, respectively, in Nuevo Leon State, northern Mexico, 2006-2007.

PubMed

Ibarra-Juarez, L; Eisen, L; Bolling, B G; Beaty, B J; Blitvich, B J; Sanchez-Casas, R M; Ayala-Sulca, Y O; Fernandez-Salas, I

2012-09-01

In the last 5 years, there has been only one reported human case of West Nile virus (WNV) disease in northern Mexico. To determine if the virus was still circulating in this region, equine and entomological surveillance for WNV was conducted in the state of Nuevo Leon in northern Mexico in 2006 and 2007. A total of 203 horses were serologically assayed for antibodies to WNV using an epitope-blocking enzyme-linked immunosorbent assay (bELISA). Seroprevalences for WNV in horses sampled in 2006 and 2007 were 26% and 45%, respectively. Mosquito collections in 2007 produced 7365 specimens representing 15 species. Culex mosquitoes were screened for WNV RNA and other genera (Mansonia, Anopheles, Aedes, Psorophora and Uranotaenia) were screened for flaviviruses using reverse-transcription (RT)-PCR. Two pools consisting of Culex spp. mosquitoes contained WNV RNA. Molecular species identification revealed that neither pool included Culex quinquefasciatus (Say) (Diptera:Culicidae) complex mosquitoes. No evidence of flaviviruses was found in the other mosquito genera examined. These data provide evidence that WNV is currently circulating in northern Mexico and that non-Cx. quinquefasciatus spp. mosquitoes may be participating in the WNV transmission cycle in this region. Published 2012. This article is a U.S. Government work and is in the public domain in the USA.

Decline of neural tube defects cases after a folic acid campaign in Nuevo León, México.

PubMed

Martínez de Villarreal, Laura; Pérez, Jesús Z Villarreal; Vázquez, Patricia Arredondo; Herrera, Ricardo Hernández; Campos, Ma Del Roble Velazco; López, Roberto Ambriz; Ramírez, José Luis Herrera; Sánchez, Jesús Manuel Yañez; Villarreal, Juan José Morales; Garza, Manuel Treviño; Limón, Adriana; López, Abel Guzmán; Bárcenas, Mario; García, Juan Ramón Cepeda; Domínguez, Andrés Sánchez; Nuñez, Rogelio Hernández; Ayala, Jorge Luis García; Martínez, Jorge Garza; González, Mario Tijerina; Alvarez, Carlos García; Castro, Roberto Negrete

2002-11-01

Nuevo León is a state in northeastern Mexico, near the border of Texas. Mean mortality rate from 1996-98 due to anencephaly cases was 0.6/1,000. In 1999 a surveillance program for the registry and prevention of neural tube defects (NTD) cases was initiated. Cases were obtained from hospitals and OB-GYN clinics by immediate notification, death certificates, or fetal death registries. Only isolated cases of NTD were included. In August 1999 a folic acid campaign was initiated with the free distribution of the vitamin to low-income women with a recommendation to take a 5.0-mg pill once a week. Number of cases and rates from 1999 to 2001 were compared (chi(2) test). After 2 years there has been a significant reduction in the number of cases and rates. In 1999 there were 95 NTD cases and in the years 2000 and 2001 there were only 59 and 55 respectively (P < 0.001). NTD rate decreased from 1.04/1,000 in 1999 to 0.58/1,000 in 2001. Anencephaly and spina bifida rates decreased from 0.55/1,000 to 0.29/1,000 and from 0.47/1,000 to 0.22/1,000 respectively, from 1999-2001. Decrease of female cases was higher than male cases for both phenotypes. After 2 years there was a 50% decrease in the incidence of anencephaly and spina bifida cases with a significant reduction of infant mortality and disability. These results encourage us to propose the use of a single tablet of 5.0-mg of folic acid per week as an alternative to supplementation on a daily basis. Copyright 2002 Wiley-Liss, Inc.

Factors associated with treatment of osteoarthritis: Analysis of a COPCORD study in Nuevo León, México.

PubMed

Hernández-Cáceres, Alexia Estefanía; Rodriguez-Amado, Jacqueline; Peláez-Ballestas, Ingris; Vega-Morales, David; Garza-Elizondo, Mario Alberto

2015-01-01

Osteoarthritis (OA) is the most prevalent rheumatic disease in Mexico. Treatment involves pharmacological and non-pharmacological strategies. To describe the factors associated with treatment of osteoarthritis in the urban and rural population of Nuevo León. Analysis of a cross-sectional study of patients with OA from a COPCORD study database. Univariate and multivariate analyses of the variables associated with treatment of OA. We included 696 patients with OA with an average age of 58 years (SD 14.1), 484 (69.5%) women. Pain with a visual analog scale (VAS) ≥4 was present in 507 (72.8%) patients. Functional disability was present in 133 (19%) patients and a mean HAQ of 0.37 (IQR 0.75) was found. The most frequent place of OA was knee in 356 (51.1%) patients; 259 (37%) patients already knew their diagnosis. The most employed treatments were non-steroidal anti-inflammatory drugs (289 patients, 58.5%). The variables associated with treatment were age >58 years (OR 1.3, 95% CI 1.0-1.5), female gender (OR 1.17, 95% CI 1.0-1.3), VAS pain ≥4 (OR 1.3, 95% CI 1.1-1.4), functional disability (OR 2.6, 95% CI 1.6-4.1), HAQ >0.375 (OR 1.9, 95% CI 1.5-2.4), and past diagnosis of OA (OR 5.1, 95% CI 3.3-8.0). In the multivariate analysis, VAS pain ≥4 (OR 1.9, 95% CI 1.2-2.8), kneeling disability (OR 3.15, 95% CI 1.3-7.4) and previous diagnosis of OA (OR 7.6, 95% CI 4.5-12.9) had statistical significance. factors associated with treatment of OA are VAS pain ≥4, kneeling disability and previous diagnosis of OA. Copyright © 2014 Elsevier España, S.L.U. All rights reserved.

A Participatory Modeling Application of a Distributed Hydrologic Model in Nuevo Leon, Mexico for the 2010 Hurricane Alex Flood Event

NASA Astrophysics Data System (ADS)

Baish, A. S.; Vivoni, E. R.; Payan, J. G.; Robles-Morua, A.; Basile, G. M.

2011-12-01

A distributed hydrologic model can help bring consensus among diverse stakeholders in regional flood planning by producing quantifiable sets of alternative futures. This value is acute in areas with high uncertainties in hydrologic conditions and sparse observations. In this study, we conduct an application of the Triangulated Irregular Network (TIN)-based Real-time Integrated Basin Simulator (tRIBS) in the Santa Catarina basin of Nuevo Leon, Mexico, where Hurricane Alex in July 2010 led to catastrophic flooding of the capital city of Monterrey. Distributed model simulations utilize best-available information on the regional topography, land cover, and soils obtained from Mexican government agencies or analysis of remotely-sensed imagery from MODIS and ASTER. Furthermore, we developed meteorological forcing for the flood event based on multiple data sources, including three local gauge networks, satellite-based estimates from TRMM and PERSIANN, and the North American Land Data Assimilation System (NLDAS). Remotely-sensed data allowed us to quantify rainfall distributions in the upland, rural portions of the Santa Catarina that are sparsely populated and ungauged. Rural areas had significant contributions to the flood event and as a result were considered by stakeholders for flood control measures, including new reservoirs and upland vegetation management. Participatory modeling workshops with the stakeholders revealed a disconnect between urban and rural populations in regard to understanding the hydrologic conditions of the flood event and the effectiveness of existing and potential flood control measures. Despite these challenges, the use of the distributed flood forecasts developed within this participatory framework facilitated building consensus among diverse stakeholders and exploring alternative futures in the basin.

First Detection of the Kdr Mutation T929I in Head Lice (Phthiraptera: Pediculidae) in Schoolchildren of the Metropolitan Area of Nuevo Leon and Yucatan, Mexico.

PubMed

Ponce-Garcia, Gustavo; Villanueva-Segura, Karina; Trujillo-Rodriguez, Gerardo; Rodriguez-Sanchez, Iram P; Lopez-Monroy, Beatriz; Flores, Adriana E

2017-07-01

The head louse Pediculus humanus capitis (De Geer) is a hematophagous ectoparasite that inhabits the human scalp. Infestations by this insect are commonly known as pediculosis, which is more common in younger groups. These infestations are asymptomatic; however, skin irritation from scratching occasionally may cause secondary bacterial infections. In recent years, the prevalence of pediculosis has increased in children; this increase has been attributed to louse resistance to the insecticides used as a control measure for infestation. The aim of the present study was to determine the presence and frequency of the knockdown resistance mutation (kdr) T929I in 468 head lice collected from 32 elementary schools in the metropolitan area of Nuevo Leon (24) and Yucatan (8), Mexico. This is the first report of a knockdown resistance (kdr) mechanism in head lice from Mexico. The T929I mutation was present in all of the sampled schools, with variability observed in its allelic and genotypic frequencies. © The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

Translations on Narcotics and Dangerous Drugs, Number 287

DTIC Science & Technology

1977-03-03

20 Jan 77) 84 Police Protect Child Traffickers (EL SOL DE MEXICO, 8 Jan 77) 86 Intellectual Drug Traffickers Sentenced (EL DIARIO DE NUEVO ...Traffickers Arrested 102 Harsh Marihuana Penalties 102 Marihuana, Traffickers Seized in Nuevo Leon 102 Twelve Tons of Marihuana 103 FJP Destroys...located. 8735 CSO: 5300 86 MEXICO INTELLECTUAL DRUG TRAFFICKERS SENTENCED Nuevo Laredo EL DIARIO DE NUEVO LAREDO in Spanish 22 Dec 76 p l-III /Text

Near Surface Structure of the Frijoles Strand of the San Gregorio Fault, Point Año Nuevo, San Mateo County, California, from Seismic Imaging

NASA Astrophysics Data System (ADS)

Campbell, L.; Catchings, R. D.; Rymer, M. J.; Goldman, M.; Weber, G. E.

2012-12-01

The San Gregorio Fault Zone (SGFZ) is one of the major faults of the San Andreas Fault (SAF) system in the San Francisco Bay region of California. The SGFZ is nearly 200 km long, trends subparallel to the SAF, and is located primarily offshore with two exceptions- between Point Año Nuevo and San Gregorio Beach and between Pillar Point and Moss Beach. It has a total width of 2 to 3 km and is comprised of seven known fault strands with Quaternary activity, five of which also demonstrate late Holocene activity. The fault is clearly a potential source of significant earthquakes and has been assigned a maximum likely magnitude of 7.3. To better understand the structure, geometry, and shallow-depth P-wave velocities associated with the SGFZ, we acquired a 585-m-long, high-resolution, combined seismic reflection and refraction profile across the Frijoles strand of the SGFZ at Point Año Nuevo State Park. Both P- and S-wave data were acquired, but here we present only the P-wave data. We used two 60-channel Geometrics RX60 seismographs and 120 40-Hz single-element geophones connected via cable to record Betsy Seisgun seismic sources (shots). Both shots and geophones were approximately co-located and spaced at 5-m intervals along the profile, with the shots offset laterally from the geophones by 1 m. We measured first-arrival refractions from all shots and geophones to develop a seismic refraction tomography velocity model of the upper 70 m. P-wave velocities range from about 600 m/s near the surface to more than 2400 m/s at 70 m depth. We used the refraction tomography image to infer the depth to the top of the groundwater table on the basis of the 1500 m/s velocity contour. The image suggests that the depth, along the profile, to the top of groundwater varies by about 18 m, with greater depth on the west side of the fault. At about 46 m depth, a 60- to 80-m-wide, low-velocity zone, which is consistent with faulting, is observed southwest of the Frijoles strand of the

Epidemiology of rheumatic diseases. A community-based study in urban and rural populations in the state of Nuevo Leon, Mexico.

PubMed

Rodriguez-Amado, Jacqueline; Peláez-Ballestas, Ingris; Sanin, Luz Helena; Esquivel-Valerio, Jorge Antonio; Burgos-Vargas, Rubén; Pérez-Barbosa, Lorena; Riega-Torres, Janett; Garza-Elizondo, Mario Alberto

2011-01-01

To estimate the prevalence of rheumatic diseases in rural and urban populations using the WHO-ILAR COPCORD questionnaire. We conducted a cross-sectional home survey in subjects > 18 years of age in the Mexican state of Nuevo Leon. Results were validated locally against physical examination in positive cases according to an operational definition by 2 rheumatologists. We used a random, balanced, and stratified sample by region of representative subjects. We surveyed 4713 individuals with a mean age of 43.6 years (SD 17.3); 55.9% were women and 87.1% were from urban areas. Excluding trauma, 1278 individuals (27.1%, 95% CI 25.8%-28.4%) reported musculoskeletal pain in the last 7 days; the prevalence of this variable was almost twice as frequent in women (33% vs 17% in men); 529 (11.2%) had pain associated with trauma. The global prevalence of pain was 38.3%. Mean pain score was 2.4 (SD 3.4) on a pain scale of 0-10. Most subjects classified as positive according to case definition (99%) were evaluated by a rheumatologist. Main diagnoses were osteoarthritis in 17.3% (95% CI 16.2-18.4), back pain in 9.8% (95% CI 9.0-10.7), undifferentiated arthritis in 2.4% (95% CI 2.0-2.9), rheumatoid arthritis in 0.4% (95% CI 0.2-0.6), fibromyalgia in 0.8% (95% CI 0.6-1.1), and gout in 0.3% (95% CI 0.1-0.5). This is the first regional COPCORD study in Mexico performed with a systematic sampling, showing a high prevalence of pain. COPCORD is a useful tool for the early detection of rheumatic diseases as well as for accurately referring patients to different medical care centers and to reduce underreporting of rheumatic diseases.

Antibody profile to Borrelia burgdorferi in veterinarians from Nuevo León, Mexico, a non-endemic area of this zoonosis.

PubMed

Skinner-Taylor, Cassandra M; Flores, Maria S; Salinas, José A; Arevalo-Niño, Katiushka; Galán-Wong, Luis J; Maldonado, Guadalupe; Garza-Elizondo, Mario A

2016-01-01

Lyme disease is a tick-borne disease caused by infections with Borrelia. Persons infected with Borrelia can be asymptomatic or can develop disseminated disease. Diagnosis and recognition of groups at risk of infection with Borrelia burgdorferi is of great interest to contemporary rheumatology. There are a few reports about Borrelia infection in Mexico, including lymphocytoma cases positive to B. burgdorferi sensu stricto by PCR and a patient with acrodermatitis chronica atrophicans. Veterinarians have an occupational risk due to high rates of tick contact. The aim of this work was to investigate antibodies to Borrelia in students at the Faculty of Veterinary Medicine and Zootechnics, at Nuevo León, Mexico, and determine the antibody profile to B. burgdorferi antigens. Sera were screened using a C6 ELISA, IgG and IgM ELISA using recombinant proteins from B. burgdorferi, B. garinii and B. afzelii. Sera with positive or grey-zone values were tested by IgG Western blot to B. burgdorferi sensu stricto. All volunteers reported tick exposures and 72.5% remembered tick bites. Only nine persons described mild Lyme disease related symptoms, including headaches, paresthesias, myalgias and arthralgias. None of the volunteers reported erythema migrans. Nine samples were confirmed by IgG Western blot. The profile showed 89% reactivity to OspA, 67% to p83, and 45% to BmpA. Positive sera samples shared antibody reactivity to the markers of late immune response p83 and BmpA, even if individuals did not present symptoms of Lyme arthritis or post-Lyme disease. The best criterion to diagnose Lyme disease in our country remains to be established, because it is probable that different strains coexist in Mexico. This is the first report of antibodies to B. burgdorferi in Latin American veterinarians. Veterinarians and high-risk people should be alert to take precautionary measures to prevent tick-borne diseases.

Systematics and faunistics of Neotropical Eucosmini. 1. Chimoptesis Powell, 1964 (Lepidoptera: Tortricidae).

PubMed

Razowski, Ózef; Becker, Vitor Osmar

2015-03-31

Twenty-one new species of Chimoptesis are described and illustrated: C. costaricae (TL: Costa Rica: San José), C. phanera (TL: Mexico: Chiapas), C. rubigo (TL: Mexico: Chiapas), C. rosariana (TL: Cuba: Pinar Rio), C. miniaula (TL: Mexico: Chiapas), C. kallion (TL: Mexico: Chiapas), C. potosiana (TL: Mexico: Nuevo Leon), C. obliquaria (TL: Mexico: Nuevo Leon), C. angulata (TL: Mexico: Chiapas), C. dentitia (TL: Mexico: Chiapas), C. faceta (TL: Mexico: Nuevo Leon), C. caera (TL: Mexico: Chiapas), C. castanescens (TL: Mexico: Chiapas), C. albomixta (TL: Mexico: Distrito Federal), C. cornigera (TL: Mexico: Nuevo Leon), C. mitrion (TL: Mexico: Nuevo Leon), C. setoses (TL: Cuba: Santiago), C. juniptesis (TL: Mexico: Chiapas), C. tamaulipasia (TL: Mexico: Tamaulipas), C. zoquiapana (Mexico: Distrito Federal), and C. rufobrunnea (TL: Costa Rica: San José). Formerly known only from the U.S., Chimoptesis is recorded south to Costa Rica in Central America and Cuba in the Caribbean.

Antibody profile to Borrelia burgdorferi in veterinarians from Nuevo León, Mexico, a non-endemic area of this zoonosis

PubMed Central

Skinner-Taylor, Cassandra M.; Salinas, José A.; Arevalo-Niño, Katiushka; Galán-Wong, Luis J.; Maldonado, Guadalupe; Garza-Elizondo, Mario A.

2016-01-01

Objectives Lyme disease is a tick-borne disease caused by infections with Borrelia. Persons infected with Borrelia can be asymptomatic or can develop disseminated disease. Diagnosis and recognition of groups at risk of infection with Borrelia burgdorferi is of great interest to contemporary rheumatology. There are a few reports about Borrelia infection in Mexico, including lymphocytoma cases positive to B. burgdorferi sensu stricto by PCR and a patient with acrodermatitis chronica atrophicans. Veterinarians have an occupational risk due to high rates of tick contact. The aim of this work was to investigate antibodies to Borrelia in students at the Faculty of Veterinary Medicine and Zootechnics, at Nuevo León, Mexico, and determine the antibody profile to B. burgdorferi antigens. Material and methods Sera were screened using a C6 ELISA, IgG and IgM ELISA using recombinant proteins from B. burgdorferi, B. garinii and B. afzelii. Sera with positive or grey-zone values were tested by IgG Western blot to B. burgdorferi sensu stricto. Results All volunteers reported tick exposures and 72.5% remembered tick bites. Only nine persons described mild Lyme disease related symptoms, including headaches, paresthesias, myalgias and arthralgias. None of the volunteers reported erythema migrans. Nine samples were confirmed by IgG Western blot. The profile showed 89% reactivity to OspA, 67% to p83, and 45% to BmpA. Conclusions Positive sera samples shared antibody reactivity to the markers of late immune response p83 and BmpA, even if individuals did not present symptoms of Lyme arthritis or post-Lyme disease. The best criterion to diagnose Lyme disease in our country remains to be established, because it is probable that different strains coexist in Mexico. This is the first report of antibodies to B. burgdorferi in Latin American veterinarians. Veterinarians and high-risk people should be alert to take precautionary measures to prevent tick-borne diseases. PMID:27504018

A Cultural Resources Reconnaissance of Five Projects in Puerto Rico.

DTIC Science & Technology

1980-01-01

Puerto Rico, Archeology, History, Ethnohistory, Prehistory, COE projects, Rio Puerto Nuevo , Rio Grande de Loiza, Rio Tallaboa, Rio Guanajibo, Rio...results of a 2 week cultural resources reconnaissance of Corps of Engineers projects in Puerto Ricoh Rio Puerto Nuevo , Rio Grande de Loi2a Rio...of Capara a title search of one of the Rio Puerto Nuevo projectO and’informatioI m pson the projects available in the US Army Corps of Engineers San

Association between serum uric acid and metabolic syndrome components in prepubertal obese children (Tanner Stage I) from Nuevo León, Mexico - a preliminary study.

PubMed

Perez, Elizabeth Solis; Medina, Mario Alberto González; Lomeli, Manuel Lopez-Cabanillas; González, Verónica Tijerina; Pérez, Jesús Zacarías Villarreal; Lavalle González, Fernando J; Imrhan, Victorine; Juma, Shanil; Vijayagopal, Parakat; Boonme, Kittipong; Prasad, Chandan

2017-01-01

Metabolic syndrome (MetS) is a major risk factor for cardiovascular disease and diabetes. Previous studies in obese children demonstrating a positive association between serum uric acid (sUA) and components of MetS are confounded by lack of uniformity in age and pubertal status of children. Therefore, we have examined the role of sUA in MetS and its components in pre-pubertal children (Tanner Stage I, age ≤ 9 years). Pre-pubertal obese children (32 boys, 27 girls, age 6-9 years) were recruited from Nuevo Leon, Mexico. For comparison, an equal number of children with normal body mass index (BMI) in the same age range (22 Boys, 39 girls, age 6-9 years) were also recruited from the same community. Presence of MetS and its components was defined according to the criteria of International Diabetes Federation. Fasting blood was analyzed for lipids, glucose, insulin, and uric acid. Among the obese children, sUA was positively associated with insulin resistance and hypertriglyceridemia and negatively associated with high density lipoprotein-cholesterol (HDLc). Subjects were three times more likely to have a MetS diagnosis per one unit (md/dL) difference in sUA. Of the 59 obese pre-pubertal children, 20 were classified as having MetS defined by the presence of abdominal obesity and two or more of other components described under methods. Of these, 57.1% (20/61) had sUA between 5.1 and 7.1 mg/dl. The findings of this study clearly indicate a positive relationship between uric acid and MetS and its components in pre-pubertal obese children with Tanner stage I and ≤9 years of age.

El problema de estabilidad de los sistemas Hamiltonianos multidimensionales

NASA Astrophysics Data System (ADS)

Cincotta, P. M.

Se revisarán los aspectos básicos del problema de estabilidad de sistemans Hamiltonianos N-dimensionales, haciendo especial énfasis en los posibles mecanismos que dan lugar a la aparición de ``caos": overlap de resonancias, difusión de Arnol'd y otros procesos difusivos alternativos. Se mencionarán los aspectos aún no resueltos sobre la estabilidad de los sistemas con N > 2. Finalmente, se discutirá cuáles de estos mecanismos podrían tener alguna relevancia en la dinámica de sistemas estelares y planetarios.

Exploiting Weaknesses: An Approach to Counter Cartel Strategy

DTIC Science & Technology

2011-12-01

AnimalPolitco, September 24, 2011, http://www.animalpolitico.com/2011/09/tranquilidad- en -frontera-de-tamaulipas-por- construccion -de-base-militar...activities. 140 “Informacion de Ubicaciones Casas de Seguridad , Halcones, Etc. Nuevo Laredo en Vivo,” Mapa nuevolaredoenvivo.es.tl, http...148 “Informacion de Ubicaciones Casas de Seguridad , Halcones, Etc. Nuevo Laredo en Vivo,” Mapa nuevolaredoenvivo.es.tl, http

Documentation and Testing of the WEAP Model for the Rio Grande/Bravo Basin

DTIC Science & Technology

2006-08-01

border between Texas and the Mexican states of Coahuila, Nuevo Leon and Tamaulipas (Appendix B, Figure 32). There are four reservoirs of interest in this...Camargo - Ciudad Acuna - Ciudad Anhuac - Ciudad Juarez - Matamoros - Metropolitan Monterrey - Nuevo Laredo - Reynosa - Piedras Negras...Rivera, and Jorge A. Hidalgo. (2001). “Sistema de apoyo a la toma de decisions para el manejo integral del agua en cuencas.” IMTA/CNA, Proyecto

PubMed

Müller Velázquez, Lucía; Bobadilla, Fernando; Novosak, Marina; Cortese, Iliana; Laczeski, Margarita

2018-03-20

Streptococcus agalactiae (SGB) es causa de infecciones severas en menores de tres meses. Meningitis, neumonía y sepsis son los principales cuadros en estos niños. Estas infecciones se encuentran entre las más graves que puede sufrir un individuo en sus primeras doce horas de vida. El niño adquiere la infección por transmisión vertical de la madre colonizada. Para prevenir la enfermedad neonatal se recomienda penicilina como droga de elección en la profilaxis intraparto (PIP) en embarazadas colonizadas. Sin embargo, actualmente se han detectado cepas con sensibilidad disminuida a penicilina por lo que resulta importante realizar la vigilancia de la sensibilidad al mismo para asegurar su utilidad durante la profilaxis. El objetivo de este trabajo fue determinar la sensibilidad a penicilina en cepas de SGB recuperados de mujeres embarazadas de 35-37 semanas de gestación. Se estudiaron 96 aislamientos y se determinó la sensibilidad por método epsilométrico Etest® (LIOFILCHEM, Italia), siguiendo las recomendaciones del Clinical Laboratory Standards Institute (CLSI). Se obtuvo la Concentración Inhibitoria Mínima (CIM) para cada aislamiento bacteriano. El 100% (96) de las cepas estudiadas fue sensible a penicilina con valores de CIM comprendidos entre 0,012 y 0,094 µg mL-1. Estos resultados indican que penicilina sigue siendo el antimicrobiano de elección durante la profilaxis intraparto, para la prevención de la enfermedad neonatal causada por SGB en nuestra región. Se destaca la importancia de la vigilancia epidemiológica de la sensibilidad a penicilina y a otros antimicrobianos para alertar sobre nuevos mecanismos de resistencia y adecuar estrategias de tratamiento.

Laser Technologies in Industry.

DTIC Science & Technology

1988-06-01

LIGIT SCATT El I MG 1. Katime, N. Gonzalez, N. Rodriguez and J.R. Quintana Departamento de Qulmica Fisica. Grupo de Nuevos Materiales . Facultad de...Vazquez amid A. Fermaindez Departamento de Qulmica Fisica. Orupo de Nuevos Hateriales. Facultad de Ciemacias. Uuiversidad del Pals Vasco. Aportado 644...Porfgal Owing to its special characteristics, radiation of a C02 laver many he used as an efficient tool for processing materiall . The present piper

[Cost analysis of rapid methods for diagnosis of multidrug resistant tuberculosis in different epidemiologic groups in Perú].

PubMed

Solari, Lely; Gutiérrez, Alfonso; Suárez, Carmen; Jave, Oswaldo; Castillo, Edith; Yale, Gloria; Ascencios, Luis; Quispe, Neyda; Valencia, Eddy; Suárez, Víctor

2011-01-01

To evaluate the costs of three methods for the diagnosis of drug susceptibility in tuberculosis, and to compare the cost per case of Multidrug-resistant tuberculosis (MDR TB) diagnosed with these (MODS, GRIESS and Genotype MTBDR plus®) in 4 epidemiologic groups in Peru. In the basis of programmatic figures, we divided the population in 4 groups: new cases from Lima/Callao, new cases from other provinces, previously treated patients from Lima/Callao and previously treated from other provinces. We calculated the costs of each test with the standard methodology of the Ministry of Health, from the perspective of the health system. Finally, we calculated the cost per patient diagnosed with MDR TB for each epidemiologic group. The estimated costs per test for MODS, GRIESS, and Genotype MTBDR plus® were 14.83. 15.51 and 176.41 nuevos soles respectively (the local currency, 1 nuevos sol=0.36 US dollars for August, 2011). The cost per patient diagnosed with GRIESS and MODS was lower than 200 nuevos soles in 3 out of the 4 groups. The costs per diagnosed MDR TB were higher than 2,000 nuevos soles with Genotype MTBDR plus® in the two groups of new patients, and lower than 1,000 nuevos soles in the group of previously treated patients. In high-prevalence groups, like the previously treated patients, the costs per diagnosis of MDR TB with the 3 evaluated tests were low, nevertheless, the costs with the molecular test in the low- prevalence groups were high. The use of the molecular tests must be optimized in high prevalence areas.

Knowledge and Beliefs of Breast Cancer Among Elderly Puerto Rican Women.

DTIC Science & Technology

1995-10-01

nuevos modelos * conceptuales e hip6tesis de investigaci6n que pueden ser cornprobadas posteriorrnente con un ni~mero mayor de sujetos (O’Brien 1993...de mama. 1. Las mujeres que han tenido cdncer de mama tienen m6.s Riesgos posibilidad de desarrollarlo de nuevo . 2. Las mujeres que tuvieron su primer...4 A. Instrucciones Generales .......................... 4 B. Responsabilidades de la entrevistadora ........... 6 C. Materiales a ser llevados al

Venezuela’s Hugo Chavez, Bolivarian Socialism, and Asymmetric Warfare

DTIC Science & Technology

2005-10-01

Francisco Rojas Aravena, “Nuevo contexto de seguridad internacional: nuevos desafios, nuevas oportunidades?” in La seguridad en America Latina pos 11...Institute, 2005; and Andres Benavente Urbina and Julio Alberto Cirino, “El populismo Chavista en Venezuela,” in La democracia defraudada, Buenos Aires... seguridad en Las Américas: Una mirada a la Conferencia Especial de Seguridad ,” Foro, Noviembre 2003, pp. 10–15. 20. Alvaro Vargas Llosa, “The

The Impact of Contemporary Conflicts Between Latin American Nations on Regional Stability and Cooperation

DTIC Science & Technology

1990-02-12

of Interamerican Studies and World Affairs, Winter 88-89, pp 139-170. 20. " Bogota y Caracas Acuerdan Med iac ion, " Nuevo Heral1d (Miami), 29 March...Banco Central del Ecuador. El Ecuadur in La OPEP. Quito: Ediciones Bancentral, 1979. 8. "Bogota y Caracas Acuerdan Mediacion." Nuevo Herald (Miami...Sur. Revista Chileno de Geooolitica, Vol. 3, April 1989, pp 59-98. 69. Porse, Ernesto G. "El Conflicto de los Grandes Proyectos Hidroelectricos

The Identification of Linker Characteristics among Venezuelan Students in the United States.

DTIC Science & Technology

1980-06-01

MOVER RECURSOS TECNICOS, MATERIALES , M9TODOS E INFORMACI6N, DESDE EL LUGAR DE DESCUBRIMIENTO 0 INVENCIdN HASTA LOS NUEVOS USUARIOSŕ [Gilmore, 1969]. El...fabricar tin nuevo tipo de vidrio aislante con infinidad de aplicaciones. 6. Materiales resistentes al calor, usados para cubrir la ojiva y el cuerpo de...mientos (el inventor o doscubridor genera nuevas ideas, conceptos, materiales , etc.), (2) la difusio’n o diseminacio’n de esas ideas o conocimientos

From Nicaragua to the 21st Century: Marine Corps Aviation’s Role in Counterinsurgency Operations

DTIC Science & Technology

2008-01-01

his weapons and made his way to the vastness of the Nuevo Segovia region in northern Nicaragua. "[Sandino] was determined to crush the Marines, rally...34 occurred at the town of Ocotal, the provincial capital of Nuevo Segovia. This first engagement displayed the ingenuity of the ground force commander...Knopf, 1968), Ch. 28. Much of Nicaragua’s politics since independence has been characterized by the rivalry between the liberal elite of Leon and the

Combustión turbulenta de materia nuclear en materia extraña

NASA Astrophysics Data System (ADS)

Vucetich, H.

La simulación numérica de supernovas tipo II muestra que los mecanismos físicos convencionales no son suficientes como para producir la explosión. La detonación de materia nuclear en materia extraña es un mecanismo físico capaz de proveer la energía faltante en las simulaciones. En esta comunicación se muestra que la turbulencia en el corazón compacto de una supernova, después del primer choque, es capaz de transformar una combustión lenta en una detonación. Se concluye que, si la materia extraña existe, todas las ``estrellas de neutrones'' son, en realidad, ``estrellas extrañas''.

Identificación de Intervenciones para el Desarrollo Positivo de la Juventud

PubMed Central

Sardiñas, Lili M.; Padilla, Viviana; Aponte, Mari; Boscio, Ana Morales; Pedrogo, Coralee Pérez; Santiago, Betzaida; Morales, Ángela Pérez; Dávila, Paloma Torres; Cesáreo, Marizaida Sánchez

2017-01-01

Resumen En el mundo hay más personas en la etapa de la juventud que en cualquier otra etapa del desarrollo. La juventud en Puerto Rico enfrenta muchas situaciones que inciden en su desarrollo y preparación para la adultez. Por lo tanto, es imperante identificar intervenciones para el desarrollo positivo de la juventud que han demostrado ser basadas en la evidencia. Además, a partir de dicha identificación, desarrollar prácticas que ayuden a los jóvenes a desarrollarse para prevenir situaciones adversas, promover experiencias positivas y propiciar que los niños y jóvenes estén involucrados y comprometidos. Se identificaron 147 intervenciones a través de una revisión tradicional de la literatura científica estadounidense. Los resultados reflejan que las intervenciones atienden la reducción de factores de riesgo y el incremento de factores de protección. Sin embargo, ninguna intervención propicia que los niños y jóvenes estén involucrados y comprometidos con su desarrollo óptimo y con sus comunidades. No obstante, todas brindan herramientas que podrían ser de utilidad para fomentar dichas prácticas en el contexto de Puerto Rico. De las 147 intervenciones identificadas seis están diseñadas para la población puertorriqueña residente en la Isla. Con el propósito de hacer la información accesible a los profesionales y la comunidad se expandió la colección del Archivo de Programas y Prácticas Basadas en Evidencia para la Prevención. PMID:28919943

Discos de acreción circumplanares: Modelo de Co-acreción

NASA Astrophysics Data System (ADS)

Parisi, M. G.; de Elía, G.

Los discos de acreción circumplanetarios precursores de los satélites regulares de los planetas gigantes, se pueden formar por cuatro mecanismos (Pollack y otros, 1991, In Uranus, Bergtralh, Miner y Mattews, Eds., p. 469, Univ. de Arizona Press, Tucson). En este trabajo estudiamos uno de tales mecanismos: el Modelo de Co-acreción. En dicho modelo, el disco circumplanetario se forma a partir de las colisiones mutuas entre planetesimales dentro de la esfera de Hill del planeta durante el proceso de formación planetaria. Realizamos un modelo semi-analítico para calcular la masa del disco y compararla con la masa requerida para formar los satélites regulares de los planetas gigantes. Hemos obtenido una cota superior para la masa del disco que resulta inferior a la masa de los satélites más grandes de los planetas gigantes. En principio, estos resultados permitirían descartar el modelo de co-acreción como uno de los procesos que podrían dar lugar a la formación de los satélites regulares. Estos resultados permiten obtener restricciones en el escenario de formación planetaria y en los mecanismos de formación de sistemas de satélites.

Symposium DD: Low-Dimensional Materials-Synthesis, Assembly, Property Scaling and Modeling. Held in San Francisco, CA on April 9-13, 2007

DTIC Science & Technology

2008-06-01

Ciencia e Ingenieria de los Materiales , Universidad de Costa Rica, San Jose, Costa Rica. We have developed a new unifying tight-binding theory that...Fisico Matem6ticas, Universidad Aut6noma de Nuevo Le6n, San Nicolas de los Garza, Nuevo LeAfA3n, Mexico; 2Chemical Engineering Department and Texas...ORNL), Oak Ridge, Tennessee; 2Departamento de Ciencia de los Materiales e IM y QI, Universidad de Cadiz, Puerto Real, Cadiz, Spain; 3Departamento de

Diseno de una matriz de soporte compuesta de colageno de piel de tiburon-aloe para ingenier a tisular (Design of Shark Skin Collagen-Aloe Composite Scaffold for Tissue Engineering)

DTIC Science & Technology

2008-01-01

colágeno es un nuevo biomaterial utilizado para la administración de fármacos, la fabri- cación de apósitos o como sustrato para ingeniería tisular cuya...crecimiento de fi broblastos in vitro. MATERIALES Y MÉTODOS Materiales El tiburón lechoso (Rhizoprionodon acutus) se capturó en la costa local y se...1000 rpm durante 3-5 minutos, se suspendieron de nuevo en medio fresco con FCS al 10%, se sembraron por la matriz de soporte (25.000 células

Nuevos fenómenos en erupciones cometarias

NASA Astrophysics Data System (ADS)

Silva, A.

Se discuten aquí tres procesos físicos novedosos encontrados en la actividad de cometas: 1) El rol de una distribución de granos de hielo como fuente extendida de H2O en la coma, 2) El efecto de una discontinuidad en el plasma cometario, llamada Cometopausa, sobre la excitación del radical OH , y 3) La actividad por erupciones a grandes distancias heliocéntricas (r > 5 AU). Con respecto a 1) y 2), se presentan modelos que ajustan bien con las observaciones. En cuanto a 3), se presentan explicaciones posibles al fenómeno, y se trata el interesante caso de Chirón 2060, basándose en observaciones propias tomadas desde el CASLEO y datos anteriores.

Manitos and Chicanos in Nuevo Mexico Politics

ERIC Educational Resources Information Center

Garcia, Flaviano Chris

1974-01-01

The article briefly reviews New Mexico's political history, surveys the present socio-political status of its Spanish speaking population, and examines the effects of the Chicano Movimiento on Manitos in New Mexico. (NQ)

Spanish Summary (Nuevos meteoritos encountrados en lmilac)

NASA Astrophysics Data System (ADS)

1987-03-01

Desde tiempos prehistoricos han sido coleccionadas piedras que caen dei cielo. Hasta hace poco eran la unica fuente para hacer estudios de laboratorio de la materia extragal, ktica, e incluso en nuestra era espacial, siguen siendo una valiosa fuente de investigacion de la temprana historia dei sistema solar. Se estima que como termine medio cada kilometro cuadrado de la superficie terrestre es golpeada cada millon de aiios por un meteorito con un pese superior a 500 gramos. La mayoria se pierden en los oceanos 0 caen en regiones con escasa poblacion. Como resultado, los museos en el munda reciben anualmente tan solo alrededor de 6 meteoritos cuya caida fuera atestiguada. Otros llegan por hallazgos casuales que en la mayoria de los casos son meteoritos que han cardo en tiempos prehistoricos.

Jose de Escandon--Colonizer of Nuevo Santander.

ERIC Educational Resources Information Center

Miller, Hubert J.

Jose de Escandon's colonization work in the present Mexican state of Tamaulipas and the lower Rio Grande valley forms an essential part of the Spanish northern borderlands. Many of the land grants in the area, ranching, and some of the present day agricultural industries originated with the colonization projects initiated by Escandon, who proved…

Impacts of a North Pacific Predator on Nearshore Seawater Mercury Cycling via Top-Down Contamination

NASA Astrophysics Data System (ADS)

Cossaboon, J. M.; Ganguli, P. M.; Flegal, A. R., Jr.

2015-12-01

Marine mammals are common sentinel species for studying marine pollution, however their potential role as vectors of contaminants to local ecosystems has rarely been addressed. Organic methylmercury, or MeHg, is a potent neurotoxin that biomagnifies approximately one to ten million-fold in aquatic carnivores such as the Northern elephant seal (Mirounga angustirostris), whose excreta and molted pelage, in turn, constitute a source of environmental MeHg contamination at the base of marine food chains. This recycling of MeHg was evidenced by comparing total mercury (HgT) and MeHg concentrations in seawater at the Año Nuevo State Reserve pinniped rookery to those of neighboring coastal sites in Central California. The observed 17-fold enrichment of MeHg in seawater at Año Nuevo during the M. angustirostris molting season (0.28—9.5 pM) was remarkable, and exceeded the range of surface water MeHg concentrations observed in the highly urbanized San Francisco Bay estuary (<0.05—2.3 pM). The importance of MeHg inputs to Año Nuevo waters from Northern elephant seals was confirmed by the HgT concentrations in molted pelage samples (average = 3.6 μg g-1 dry wt.), which presumably contained >80% MeHg. This equates to an annual per-capita emission factor of 0.05 g MeHg per adult elephant seal. Based on this estimate, we calculate that approximately 0.2 kg of organic Hg entered the nearshore environment of Año Nuevo during that molting season. This elevated methylmercury (MeHg) in seawater adjacent to the rookery may become bioavailable to lower trophic levels, demonstrating that marine mammal colonization can substantially influence nearshore mercury cycling and potentially threaten ecosystem health.

Mineralogical Composition of the Mexican Ordinary Chondrite Type Meteorite: A Raman, Infrared and XRD Study

NASA Astrophysics Data System (ADS)

Ostrooumov, M.

2016-08-01

The Raman microprobe (RMP), infrared (IR) and XRD analysis have been applied to the examination of mineralogical composition of seven mexican meteorites: Aldama, Cosina, El Pozo, Escalon, Nuevo Mercurio,Pacula, Zapotitlan Salinas.

27 CFR 9.75 - Central Coast.

Code of Federal Regulations, 2012 CFR

2012-04-01

... Mountain, California, scale 1:24,000, dated 1956, Photorevised 1980; (31) Half Moon Bay, California, scale..., Año Nuevo, Franklin Point, Pigeon Point, San Gregorio, Half Moon Bay, Montara Mountain and San...

27 CFR 9.75 - Central Coast.

Code of Federal Regulations, 2013 CFR

2013-04-01

... Mountain, California, scale 1:24,000, dated 1956, Photorevised 1980; (31) Half Moon Bay, California, scale..., Año Nuevo, Franklin Point, Pigeon Point, San Gregorio, Half Moon Bay, Montara Mountain and San...

27 CFR 9.75 - Central Coast.

Code of Federal Regulations, 2014 CFR

2014-04-01

... Mountain, California, scale 1:24,000, dated 1956, Photorevised 1980; (31) Half Moon Bay, California, scale..., Año Nuevo, Franklin Point, Pigeon Point, San Gregorio, Half Moon Bay, Montara Mountain and San...

Bilingual Intercultural Teacher Education: "Nuevos Maestros Para Bolivia"

ERIC Educational Resources Information Center

Delany-Barmann, Gloria

2009-01-01

Educational reform efforts in Bolivia have created possibilities for teacher-training institutions to focus on bilingual intercultural education. How teacher trainers and future teachers embark upon this endeavor differs somewhat depending on the sociolinguistic, historical, and institutional contexts of each community. This article reports…

Estudio tribologico de nuevos nanofluidos ionicos y nanomateriales

NASA Astrophysics Data System (ADS)

Saurin Serrano, Noelia

The present work has focused on tribology and surface engineering of materials and interfaces. In the first place, four new halogen-free ionic liquids have been studied as boundary lubricants in reciprocating steel-sapphire and steel-epoxy resin contacts. Two different steel surface roughness have been compared, finding not only low friction, but also non-measurable wear, in the case of higher roughness. New ionic nanofluids have been obtained by dispersion of two commercial graphene grades in the ionic liquid 1-octyl-3-methylimidazlium tetrafluoroborate, finding the best friction reducing and antiwear performance in pin-on-disc sapphire-steel and steel-epoxy resin contacts. New aqueous lubricants have been developed by addition of new dispersions of graphene in a protic ionic liquid free from contaminant elements, as it is an ammonium cation citrate anion derivative. Controlled water evaporation leads to new self-lubricating surfaces. In the present work, the tribological performance of a fragile low wear-resistance materials such as epoxy resin has been improved by addition of variables concentrations of the ionic liquid 1-octyl-3-methylimidazolium tetrafluoroborate or carbon nanophases such as singlewalled carbon nanotubes or graphene. Blended with the ionic liquid or previously modified by it. The first epoxy resin materials with ability of self-healing the abrasion surface damage, due to the addition of ionic liquid, are described. New epoxy resin matrix nanocomposites, obtained by combination of carbon nanophases and ionic liquid, show better tribological behavior than the materials containing any of the additives separately. Finally, a new research line on the cure of the new epoxy matrix nanocomoposites as protective coatings on steel substrates has been initiated.

Desarrollo y validación de una nueva tecnología, basada en arginina al 1.5%, un compuesto de calcio insoluble y fluoruro, para el uso diario en la prevención y tratamiento de la caries dental.

PubMed

Cummins, D

2013-10-22

este artículo discute brevemente la prevalencia de caries, la naturaleza multifactorial de su etiología, el riesgo de caries y el papel y eficacia del fluoruro. Resalta también la investigación sobre el metabolismo bacteriano, que ha aportado conocimientos sobre la defensa natural oral contra la caries y la base para el desarrollo de una nueva tecnología para la prevención diaria y el tratamiento de la caries. Por último, se resume la evidencia que respalda que la tecnología complementa y mejora la eficacia anti-caries de la crema dental con fluoruro. los datos globales muestran que a pesar de la exitosa introducción del fluoruro, la caries dental es una enfermedad prevalente. La experiencia de caries depende del balance entre el consumo de azúcares, la higiene oral y el uso del fluoruro. Hay tres conceptos científicos que son fundamentales en las nuevas mediciones para detectar, tratar y monitorear la caries: (1) la caries dental es un proceso dinámico, (2) la caries dental es un proceso continuo de etapas que van desde reversible (pre-clínica) hasta irreversible (lesiones clínicamente detectables), y (3) el proceso de la caries es un balance de factores patológicos y protectores que pueden modularse para el manejo de la caries. El fluoruro funciona como factor protector al detener y revertir el proceso de la caries, pero el fluoruro no previene los factores patológicos que inician el proceso. Se ha identificado una tecnología novedosa, basada en arginina y un compuesto insoluble de calcio, que está dirigida a la placa dental para prevenir la iniciación del proceso de caries al reducir los factores patológicos. Como los mecanismos de acción de la arginina y el fluoruro son altamente complementarios, se ha desarrollado un nuevo dentífrico que combina la arginina y el fluoruro, y se ha probado clínicamente que brinda una prevención superior contra la caries. Copyright © 2013 Elsevier Ltd. All rights reserved.

PREVENCIÓN DEL VIH/SIDA EN LOS CIRCUITOS DE LEVANTE HSH: UNA ASIGNATURA PENDIENTE.

PubMed

Barreda, Victoria; Carballo-Dieguez, Alex; Marone, Rubén; Balán, Iván; Pando, María Ángeles; Avila, María Mercedes

2010-12-01

A partir de un relevamiento de tipo etnográfico, se describen lugares de encuentro de HSH en la Ciudad de Buenos Aires y sus prácticas sexuales. El reconocimiento de tales espacios, así como las características que asumen en ellos los encuentros sexuales entre los HSH, plantean obstáculos específicos en la adopción de comportamientos preventivos y, asimismo, generan nuevos desafíos para las actividades de prevención. Se plantean las dificultades y debates conceptuales que la misma categoría presenta, y sus consecuencias en el abordaje preventivo y teórico-metodológico para las ciencias sociales. Además, se proponen nuevos interrogantes acerca de los alcances y las limitaciones del modelo preventivo del VIH/Sida para HSH.

Quaternary crustal deformation along a major branch of the San Andreas fault in central California

USGS Publications Warehouse

Weber, G.E.; Lajoie, K.R.; Wehmiller, J.F.

1979-01-01

Deformed marine terraces and alluvial deposits record Quaternary crustal deformation along segments of a major, seismically active branch of the San Andreas fault which extends 190 km SSE roughly parallel to the California coastline from Bolinas Lagoon to the Point Sur area. Most of this complex fault zone lies offshore (mapped by others using acoustical techniques), but a 4-km segment (Seal Cove fault) near Half Moon Bay and a 26-km segment (San Gregorio fault) between San Gregorio and Point Ano Nuevo lie onshore. At Half Moon Bay, right-lateral slip and N-S horizontal compression are expressed by a broad, synclinal warp in the first (lowest: 125 ka?) and second marine terraces on the NE side of the Seal Cove fault. This structure plunges to the west at an oblique angle into the fault plane. Linear, joint0controlled stream courses draining the coastal uplands are deflected toward the topographic depression along the synclinal axis where they emerge from the hills to cross the lowest terrace. Streams crossing the downwarped part of this terrace adjacent to Half Moon Bay are depositing alluvial fans, whereas streams crossing the uplifted southern limb of the syncline southwest of the bay are deeply incised. Minimum crustal shortening across this syncline parallel to the fault is 0.7% over the past 125 ka, based on deformation of the shoreline angle of the first terrace. Between San Gregorio and Point Ano Nuevo the entire fault zone is 2.5-3.0 km wide and has three primary traces or zones of faulting consisting of numerous en-echelon and anastomozing secondary fault traces. Lateral discontinuities and variable deformation of well-preserved marine terrace sequences help define major structural blocks and document differential motions in this area and south to Santa Cruz. Vertical displacement occurs on all of the fault traces, but is small compared to horizontal displacement. Some blocks within the fault zone are intensely faulted and steeply tilted. One major block 0

Detection of Bartonella bacilliformis by Real-Time PCR in Naturally Infected Sand Flies

DTIC Science & Technology

2004-03-04

pp 231-298. 81 Maguiña, C. 1998. Bartonellosis o Enfermedad de...Carrion, nuevos aspectos de una vieja enfermedad . A.F.A. Editores Importadores. Lima, Peru Malqui, V., Speelmon, E., Verastegui, M., Maguina, C

PREVENCIÓN DEL VIH/SIDA EN LOS CIRCUITOS DE LEVANTE HSH: UNA ASIGNATURA PENDIENTE1

PubMed Central

Barreda, Victoria; Carballo-Dieguez, Alex; Marone, Rubén; Balán, Iván; Pando, María Ángeles; Ávila, María Mercedes

2011-01-01

Resumen A partir de un relevamiento de tipo etnográfico, se describen lugares de encuentro de HSH en la Ciudad de Buenos Aires y sus prácticas sexuales. El reconocimiento de tales espacios, así como las características que asumen en ellos los encuentros sexuales entre los HSH, plantean obstáculos específicos en la adopción de comportamientos preventivos y, asimismo, generan nuevos desafíos para las actividades de prevención. Se plantean las dificultades y debates conceptuales que la misma categoría presenta, y sus consecuencias en el abordaje preventivo y teórico-metodológico para las ciencias sociales. Además, se proponen nuevos interrogantes acerca de los alcances y las limitaciones del modelo preventivo del VIH/Sida para HSH. PMID:21874154

Interannual changes in snow cover and its impact on ground surface temperatures in Livingston Island (Antarctica)

NASA Astrophysics Data System (ADS)

Nieuwendam, Alexandre; Ramos, Miguel; Vieira, Gonçalo

2015-04-01

In permafrost areas the seasonal snow cover is an important factor on the ground thermal regime. Snow depth and timing are important in ground insulation from the atmosphere, creating different snow patterns and resulting in spatially variable ground temperatures. The aim of this work is to characterize the interactions between ground thermal regimes and snow cover and the influence on permafrost spatial distribution. The study area is the ice-free terrains of northwestern Hurd Peninsula in the vicinity of the Spanish Antarctic Station "Juan Carlos I" and Bulgarian Antarctic Station "St. Kliment Ohridski". Air and ground temperatures and snow thickness data where analysed from 4 sites along an altitudinal transect in Hurd Peninsula from 2007 to 2012: Nuevo Incinerador (25 m asl), Collado Ramos (110 m), Ohridski (140 m) and Reina Sofia Peak (275 m). The data covers 6 cold seasons showing different conditions: i) very cold with thin snow cover; ii) cold with a gradual increase of snow cover; iii) warm with thick snow cover. The data shows three types of periods regarding the ground surface thermal regime and the thickness of snow cover: a) thin snow cover and short-term fluctuation of ground temperatures; b) thick snow cover and stable ground temperatures; c) very thick snow cover and ground temperatures nearly constant at 0°C. a) Thin snow cover periods: Collado Ramos and Ohridski sites show frequent temperature variations, alternating between short-term fluctuations and stable ground temperatures. Nuevo Incinerador displays during most of the winter stable ground temperatures; b) Cold winters with a gradual increase of the snow cover: Nuevo Incinerador, Collado Ramos and Ohridski sites show similar behavior, with a long period of stable ground temperatures; c) Thick snow cover periods: Collado Ramos and Ohridski show long periods of stable ground, while Nuevo Incinerador shows temperatures close to 0°C since the beginning of the winter, due to early snow cover

Moving towards South-South International Health: debts and challenges in the regional health agenda.

PubMed

Herrero, María Belén

2017-07-01

The aim of this paper is twofold. First, it aims to investigate the increased interest in health as an important dimension of the foreign policy and diplomatic concerns together with the emergence of a new framework for regional health integration and regional health diplomacy. Second, it seeks to understand the role and practices of new regional blocs in the field of health and whether they are conducting to the emergence of new strategies for addressing health regional policies in South America. The regional policy process relates to health as a right. Thus, some practices and processes in social policy are setting new standards for political and social cohesion in the construction of new regionalism. Health crosses national, regional, and global agendas in a multi-directional fashion, rather than via one-way, top-down policy transfer. A special feature of Unasur is upholding regional health sovereignty despite the unique fact that member countries retain national autonomy. Unasur has projected foreign policy that promotes social values in ways that seem innovative. Experience as Unasur shows that regional organisms can become a game changer in global diplomacy and an influential actor in the international agenda. Resumen El objetivo de este artículo es doble. En primer lugar,investigar el creciente interés en la salud como una dimensión importante de la política exterior, en sintonía con el surgimiento de un nuevo marcopara la integración regional y la diplomacia en salud. En segundo lugar, comprender el papel y las prácticas de los nuevos bloques regionales en el campo de la salud y si estasconducena la emergencia de nuevas estrategias para abordar las políticas sanitarias regionales en América del Sur. Los nuevos procesos de integración regional se refieren a la salud como un derecho. Así, algunas prácticas y procesos de la política regional están estableciendo nuevos patrones de cohesión política y social en el avancede un nuevo regionalismo

Heavy Ion Propulsion in the Megadalton Range

DTIC Science & Technology

2006-11-01

atomizacidn electrostdtica, Universidad Carlos III, Madrid, Spain (2006) 15. D. Garoz, "Sintesis, estudio y mezclas de nuevos combustibles basados en...propellants for electrical propulsion from Taylor cones in vacuo), Proyecto fin de carrera (Senior Thesis), Universidad Politecnica de Madrid, Marzo 2004

78 FR 66097 - Acies Corporation, Immtech Pharmaceuticals, Inc., MRU Holdings, Inc., MSTI Holdings, Inc., Nestor...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-11-04

... SECURITIES AND EXCHANGE COMMISSION [File No. 500-1] Acies Corporation, Immtech Pharmaceuticals, Inc., MRU Holdings, Inc., MSTI Holdings, Inc., Nestor, Inc., New Generation Holdings, Inc., and Nuevo... that there is a lack of current and accurate information concerning the securities of New Generation...

76 FR 46724 - Takes of Marine Mammals Incidental to Specified Activities; Seabird and Pinniped Research...

Federal Register 2010, 2011, 2012, 2013, 2014

2011-08-03

... Nuevo Island, and Point Reyes National Seashore in central California (CA) for one year. PRBO, along... research activities for one year. NMFS reviewed PRBO's application and identified a number of issues...; observing seabird nesting habitat; restoring nesting burrows; observing breeding elephant seals, and...

CREATION OF A MULTIDISCIPLINARY PROJECT PLATFORM FOR WATER SYSTEMS IN DEVELOPING COUNTRIES

EPA Science Inventory

The Lehigh University chapter of Engineers Without Borders-USA will design and construct a sustainable, multi-phase system for the treatment and distribution of drinking water in Pueblo Nuevo, Honduras. The new system will include a slow sand filter, hypochlorinator, water sto...

Guidelines for Clinical Practice: Hymenoptera sting allergy in children: 2017 update

PubMed

2017-10-01

Las picaduras por himenópteros son frecuentes en la infancia. La mayoría producen reacciones locales, consecuencia de un mecanismo inflamatorio, no alérgico, no tienen progresión y se resuelven con simples medidas terapéuticas. Las reacciones más extensas, generalmente, están asociadas a mecanismos alérgicos, mediados por inmunoglobulina E. Su máxima expresión, la anafilaxia, presenta síntomas cutáneos, respiratorios, cardiovasculares, digestivos y/o neurológicos, con riesgo de muerte. La prevalencia de anafilaxia en pacientes con mastocitosis sistémica es más alta. La familia Hymenoptera, que incluye hormigas coloradas, abejas y avispas, es la causante de las picaduras de mayor riesgo, potencialmente fatales. Los pilares del diagnóstico son la historia clínica, la identificación del insecto, y las pruebas diagnósticas cutáneas y/o in vitro interpretadas por el especialista en Alergia e Inmunología. La inmunoterapia con veneno es el tratamiento de elección para prevenir reacciones anafilácticas por picaduras de himenópteros.

Laredo District Coahuila/Nuevo Leon/Tamaulipas border master plan.

DOT National Transportation Integrated Search

2012-06-01

Border Master Plans document a regions needs and priorities, and recommend a mechanism to ensure coordination on current and planned future port of entry (POE) projects and supporting transportation infrastructure to serve the anticipated demand i...

[Heart transplant in "Nuevo Leon": the first 33 cases].

PubMed

Herrera Garza, Eduardo; Molina Gamboa, Julio; Decanini Arcaute, Horacio; Ibarra Flores, Marcos; Torres García, Myrella; Macías Hidalgo, Carlos; González Oviedo, Roberto; de la Fuente Magallanes, Felipe de Jesús; Elizondo Sifuentes, Lius Angel; Villarreal Arredondo, Miguel Angel; Ortega Durán, Oscar; Martínez Bermúdez, Pedro; García Castillo, Armando; Becerra García, Oralia; Martínez Rodríguez, Diana; Contreras Lara, Carmen; Olivares de la Cerda, María de Consuelo; Treviño Treviño, Alfonso

2006-01-01

Heart failure is one of the most important causes of death worldwide. Heart transplant is the last effective alternative when the medical and surgical treatments have failed in patients with end stage heart failure, giving them an 80% one year survival rate. Unfortunately, during the outcome, the heart transplant patients can develop complications such as graft rejection and opportunistic infections because of the use of immunosuppressive therapy. In the present article we report the experience with 33 heart transplant patients. Our program not only has successfully transplanted patients with advanced age but, for the first time in Latin America we have transplanted patients assisted with the ambulatory Thoratec TLC II system. Even with limited resources, we have managed the same complications than other heart transplant programs, our 82% one year survival rate is similar than reports in medical literature.

Estudio ab initio del mecanismo de la reacción HSO + O3

NASA Astrophysics Data System (ADS)

Nebot Gil, I.

La reacción entre el radical HSO y el ozono ha sido ampliamente estudiada desde el punto de vista experimental debido a la importancia que tiene el radical HSO en la oxidación de los compuestos de azufre reductores y a que puede contribuir a la producción de H2SO4 [1-4]. Se realizaron diversos estudios teóricos sobre la cinética de la reacción entre el radical HSO y el ozono. La reacción del HSO con el ozono presenta tres canales diferentes : HSO + O3 &rightarrow &HSO2 + O2 &rightarrow &HS + 2 O2 &rightarrow &SO + OH + O2 La controversia existente entre los grupos experimentales sobre cuál de las tres vías es la predominante, se ha resuelto mediante un estudio teórico de todas ellas utilizando métodos ab initio. La estructura de todos los reactivos, productos, intermedios y estados de transición ha sido optimizada a nivel ab initio utilizando los métodos UMP2 /6-31G** y QCISD/6-31G**.

Breast Cancer Epidemiology in Puerto Rico

DTIC Science & Technology

2013-06-30

Universidad de Puerto Rico Recinto de Ciencias Medicas Escuela Graduada de Salud Publica Apartado postal 365067, San Juan, Puerto Rico 00936-5067... Ciencias Medicas. Este proyecto recibe fondos del Programa de Investigacion de Cancer de Mama, bajo el mecanismo de Donativo para Adiestramiento en...minimo. Una enfermera adiestrada del Consorcio de Investigacion Clinica y Traslacional del Recinto de Ciencias Medicas (PRCTRC) tomara estas muestras

Everybody's Problem: Novice Teachers in Disadvantaged Mexican Schools

ERIC Educational Resources Information Center

Martínez, Nora H.

2014-01-01

This paper explores the difficulties that novice teachers confront at two economically, socially, and academically disadvantaged schools in the state of Nuevo Leon, Mexico. The researchers employed the action research tradition. Problems were identified using participant observation during reflexive workshops conducted with novice teachers and…

Original Long War: Supply-Side Strategy in the War on Drugs

DTIC Science & Technology

2008-03-19

quick comparison of brutal and rapidly escalating Mexican drug-related violence, particularly in border cities and states (Nuevo Laredo, Ciudad ...personnel. Most employees do not know enough of the overall operation to be truly dangerous and they’re sensible enough to realize that incarceration by

Diagnóstico y cinética de plasmas de NxOy y aire a baja presión. Aplicaciones atmosféricas

NASA Astrophysics Data System (ADS)

Tanarro Onrubia, Isabel

Los procesos cinéticos que tienen lugar en plasmas de óxidos de nitrógeno y de aire presentan relevancia en diferentes campos de investigación como son los relativos al control de contaminantes atmosféricos emitidos en procesos de combustión, a su formación en las superficies de las naves supersónicas y los vehículos espaciales al entrar en la atmósfera, o a su presencia en la ionosfera terrestre. En general, los fenómenos que tienen lugar en sistemas tan alejados del equilibrio termodinámico como los plasmas luminiscentes, son capaces de originar determinadas especies intermedias y productos finales de reacción a temperaturas y presiones mucho menores que las de otros procedimientos físico-químicos; y hacen posible reproducir y caracterizar en laboratorio ciertas especies inestables y mecanismos primordiales de la alta atmósfera. Por otra parte, las técnicas de resolución temporal aplicadas a plasmas modulados en amplitud resultan notablemente más sensibles que las medidas estacionarias para estimar la relevancia de los distintos mecanismos elementales o incluso para determinar sus constantes de velocidad. En este trabajo se presenta un estudio espectroscópico y espectrométrico comparativo de plasmas de óxidos de nitrógeno y de aire a baja presión (0.001-1 mbar) generados en descargas de cátodo hueco continuas o moduladas, y se propone un modelo cinético único y relativamente sencillo, que explica satisfactoriamente los comportamientos observados en todos ellos. Dicho modelo se basa en la resolución de un sistema de ecuaciones diferenciales dependientes del tiempo, que incluye los mecanismos elementales de disociación e ionización de los precursores y los productos, reacciones homogéneas entre especies atómicas, iónicas y moleculares, y reacciones heterogéneas. Al abordar estos sistemas, se constata una gran carencia de datos experimentales o teóricos sobre secciones eficaces o constantes de velocidad para las reacciones de

A new genus of pine-feeding Cochylina from the western United States and northern Mexico (Lepidoptera: Tortricidae: Euliini)

USDA-ARS?s Scientific Manuscript database

Eupinivora, new genus, is described and illustrated from the montane regions of western United States (Nevada, Utah, Wyoming, Colorado, Arizona, New Mexico, and Texas) and northern Mexico (Nuevo León and Durango). As presently defined, the genus includes six species: E. ponderosae, n. sp. (USA: Ariz...

Single Chondrule K/Ar ages of Mexican Meteorites Using ID-TIMS.

NASA Astrophysics Data System (ADS)

Hernandez, M.; Sole, J.

2007-05-01

We have determined the K/Ar ages of two H5 ordinary meteorites: Cosina and Nuevo Mercurio, neither dated until this study. We analyzed several single chondrules - weighing few milligrams - of each meteorite. Ages were obtained by using very precise K content determined by isotope dilution mass spectrometry. The K content in chondrules ranges between 650 and 1400 ppm. The 40Ar was measured by static vacuum noble gas mass spectrometry. Samples were fused with an infrared CO2 laser. Chondrule ages vary from 3.66 to 4.59 Ga for Cosina and from 4.20 to 4.87 Ga for Nuevo Mercurio. A comparison between our data and the published K/Ar ages of H and L whole rocks shows that dates obtained from single chondrules are older than those obtained from whole rocks and seem to preserve older events not evidenced in the WR ages. This implies that chondrules can preserve K/Ar ages very close to U-Pb crystallization ages.

Acarine infracommunities associated with the Mexican free-tailed bat, Tadarida brasiliensis mexicana (Chiroptera: Molossidae) in arid regions of Mexico.

PubMed

Guzmán-Cornejo, C; García-Prieto, L; Morales-Malacara, J B; Pérez-Ponce De León, G

2003-11-01

The Mexican free-tailed bat, Tadarida brasiliensis mexicana, is one of the most widely distributed bats, and its range includes the whole Mexican territory. Ectoparasites of this bat have been the subject of isolated reports, but no studies of its community ecology have been conducted. The acarine infracommunities associated with this bat were analyzed, comparing bat populations from three arid regions of Mexico: an abandoned factory in Nombre de Dios, Durango; a cave in Santiago, Nuevo León; and a church in Concepción del Oro, Zacatecas. The acarine infracommunity in Nuevo Le6n's bats exhibited the highest levels of diversity as reflected by a higher richness, a lower dominance, and a moderate and relatively homogeneous abundance in this locality in relation to the other two. This pattern is influenced by stable cave conditions relative to artificial habitats. Notwithstanding, further studies are required to determine whether or not different habitat conditions are a primary factor in the process of structuring the acari infracommunities.

Marine pollution effects on the southern surf crab Ovalipes trimaculatus (Crustacea: Brachyura: Polybiidae) in Patagonia Argentina.

PubMed

Lezcano, Aníbal Hernán; Rojas Quiroga, María Laura; Liberoff, Ana Laura; Van der Molen, Silvina

2015-02-28

We compared the carapace shape and thickness as well as the energy density of Ovalipes trimaculatus inhabiting areas comprising a gradient of marine pollution: high, moderate and undetected, in the Nuevo gulf (Patagonia Argentina). The carapace shape was evaluated by means of individual asymmetry scores (=fluctuating asymmetry) whereas the carapace thickness was assessed by measuring the carapace dry weight. The energy density was analyzed through its negative relationship with water content in muscle tissue. The individual asymmetry scores as well as the percentage of water content in muscle tissue were proportional to the marine pollution gradient, whereas the carapaces thickness did not differ among sampling sites. Our results are consistent with previous findings and demonstrate the direct effect of marine pollution on other taxa different from gastropods, cephalopods and polyplacophora and add to long-standing concerns about detrimental effects caused by marine pollution on the benthic community of the Nuevo gulf. Copyright © 2014 Elsevier Ltd. All rights reserved.

Task Complexity, the Cognition Hypothesis, and Interaction in CMC and FTF Environments

ERIC Educational Resources Information Center

Baralt, Melissa Lorrain

2010-01-01

The construct of cognitive complexity has played an increasingly important role in studies on task design, which aim to explore how increases in the cognitive complexity of tasks differentially mediate interaction and learning outcomes (Kim, 2009; Gilabert, Baron, & Llanes, 2009; Kim & Tracy-Ventura, forthcoming; Nuevo, 2006; Revesz, 2009,…

Pinniped Hearing in Complex Acoustic Environments

DTIC Science & Technology

2012-09-30

Piedras Blancas, is located just north of Cambria, California and is quickly expanding as one of the largest northern elephant seal colonies along the...acoustically sampled at the Año Nuevo breeding colony, and 46 individuals were similarly studied at the Piedras Blancas breeding colony during the 2011-12

F-35 Force Development Evaluation and Weapons School Beddown Environmental Impact Statement

DTIC Science & Technology

2011-05-01

deficiencias encontradas después del despliegue del sistema; ♦ explora medios no materiales (por ejemplo, tácticas) para satisfacer requisitos...del adecuado desempeño del avión en combate al proporcionar entrenamiento, información sobre las capacidades operativas y nuevos requisitos. Además

Defeating Mexico’s Drug Trafficking Organizations: The Range of Military Operations in Mexico

DTIC Science & Technology

2012-06-08

Nuevo Leon, Chihuahua, Baja California, and Sinaloa (see figure 2) with 60 percent of all killings in 2008 reported in three cities: Tijuana, Baja...California; Culiacan, Sinaloa ; and Ciudad Juarez, Chihuahua.2 Ciudad Juarez had the highest rate of DTO related deaths; this is significant for the U.S...

Monitoring bird population trends in North America

USGS Publications Warehouse

Robbins, C.S.; Bystrak, D.; Geissler, P.H.; Purroy, F.J.

1983-01-01

Se ofrece un nuevo metodo para computar las oscilaciones demograficas de las aves a lo largo de los anos. Con los datos suministrados por el proyecto 'Aves nidificantes en Norteamerica' , se indican en la Tabla 1 las pautas de cambio numerico de una serie seleccionada de aves holarticas.

Prevalence of back pain in the community. A COPCORD-based study in the Mexican population.

PubMed

Peláez-Ballestas, Ingris; Flores-Camacho, Roxanna; Rodriguez-Amado, Jacqueline; Sanin, Luz Helena; Valerio, Jorge Esquivel; Navarro-Zarza, Eduardo; Flores, Diana; Rivas, Lourdes L; Casasola-Vargas, Julio; Burgos-Vargas, Ruben

2011-01-01

Back pain (BP) is frequent in the community; its prevalence in México is 6%. Our objective was to determine the prevalence of BP in Mexican communities and determine its most important characteristics. A cross-sectional study of individuals aged > 18 years was conducted in Mexico City and in urban communities in the state of Nuevo León. Sampling in Mexico City was based on community census and in Nuevo León, on stratified, balanced, and random sampling. Procedures included a door-to-door survey, using the Community Oriented Program for the Control of Rheumatic Diseases, to identify individuals with BP > 1 on a visual analog scale in the last 7 days. General practitioners/rheumatology fellows confirmed and characterized BP symptoms. In all, 8159 individuals (mean age 43.7 yrs, two-thirds female) were surveyed and 1219 had BP. The prevalence of nontraumatic BP in the last 7 days was 8.0% (95% CI 7.5-8.7). The mean age of these individuals was 42.7 years, and 61.9% were female. Thirty-seven percent had inflammatory BP [prevalence of 3.0% (95% CI 2.7-3.4)]. Compared with the state of Nuevo Léon, the characteristics and consequences of BP in Mexico City were more severe. In logistic regression analysis, living in Mexico City, having a paid job, any kind of musculoskeletal pain, high pain intensity, and obesity among other variables were associated with BP. The prevalence of nontraumatic BP in the last 7 days in urban communities in México is 8.0%. However, clinical features and consequences differed among the communities studied, suggesting a role for local factors in BP.

Perfil de temperatura dos funis magnetosféricos de estrelas T Tauri com aquecimento alfvênico

NASA Astrophysics Data System (ADS)

Vasconcelos, M. J.

2003-08-01

Estrelas T Tauri Clássicas são objetos jovens circundados por discos de gás e poeira e que apresentam uma intensa atividade magnética. Seu espectro mostra linhas de emissão alargadas que são razoavelmente reproduzidas nos modelos de acresção magnetosférica. No entanto, o perfil de temperatura dos funis magnéticos é desconhecido. Aquecimento magnético compressional e difusão ambipolar foram considerados para estas estruturas, porém as temperaturas obtidas não são suficientes para explicar as observações. Neste trabalho, examinamos o aquecimento gerado pelo amortecimento de ondas Alfvén através de quatro mecanismos, os amortecimentos não-linear, turbulento, viscoso-resistivo e colisional como função da freqüência da onda. Inicialmente, a temperatura é ajustada para reproduzir as observações e o grau de turbulência requerido para que o mecanismo seja viável é calculado. Os resultados mostram que este é compatível com os dados observacionais. Apresentam-se, também, resultados preliminares do cálculo auto-consistente do perfil de temperatura dos funis, levando-se em conta fontes de aquecimento Alfvênica e fontes de resfriamento.

Educational Discourse in Spain during the Early Franco Regime (1936-1943): Toward a Genealogy of Doctrine and Concepts

ERIC Educational Resources Information Center

Laudo, Xavier; Vilanou, Conrad

2015-01-01

In this article an analysis is undertaken of Spanish educational discourse during the early years of the Franco regime, from the Civil War (1936-1939) to the establishment of the "Nuevo Estado" or New State (1939-1943), employing Reinhart Koselleck's principles of conceptual history. Without totally spurning the totalitarian and fascist…

An Entrepreneurial Learning Exercise as a Pedagogical Tool for Teaching CSR: A Peruvian Study

ERIC Educational Resources Information Center

Farber, Vanina A.; Prialé, María Angela; Fuchs, Rosa María

2015-01-01

This paper reports on an exploratory cross-sectional study of the value of an entrepreneurial learning exercise as a tool for examining the entrepreneurship dimension of corporate social responsibility (CSR). The study used grounded theory to analyse diaries kept by graduate (MBA) students during the "20 Nuevos Soles Project". From the…

77 FR 11586 - Certain Toner Cartridges and Components Thereof

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-27

...., Ltd., d/b/a Huebon Co., Limited, d/b/a Ink-Tank, 3/F, No. 1 Industrial Building, Pingdong 2 Road....V., Avenida del Parque 1175, Monterrey Technology Park, Cienega de Flores, Nuevo Leon, Mexico 65550...., 7611 Green Meadows Drive, Lewis Center, OH 43035. Discount Office Items, Inc., 302 Industrial Drive...

77 FR 12325 - Certain Toner Cartridges and Components Thereof Corrected Notice of Institution of Investigation

Federal Register 2010, 2011, 2012, 2013, 2014

2012-02-29

...., Ltd., d/b/a Huebon Co., Limited, d/b/a Ink-Tank, 3/F, No. 1 Industrial Building, Pingdong 2 Road....V., Avenida del Parque 1175, Monterrey Technology Park, Cienega de Flores, Nuevo Leon, Mexico 65550...., 7611 Green Meadows Drive, Lewis Center, OH 43035. Discount Office Items, Inc., 302 Industrial Drive...

Research and Development of Human and Primate Antibodies for Immunotherapy of Viral Hemorrhagic Fever Infections

DTIC Science & Technology

1989-06-01

mecanismos immunologicos en la infeccion experimental de la rata con virus Junin. Resumen II congreso argentino microbiologia. Buenos Aires: Asociacion...other authorized documents. 89 I> I. ECURITY ICLASSIFICATION OF THIS PAGE REPORT DOCUMENTATION PAGE FmB ov0d0IOMB No. 0704-01" la REPORT SECURITY CASS,F...replication in culture macrophages with West Nile virus (9), and in dengue virus infection in children (10). Clinically, dengue virus normally produces a non

CLAVE: Revista Especializada de ASOVELE (Asociacion Venezolana para la Ensenanza de la Lengua), 1997-1998 (CLAVE: Specialized Magazine of ASOVELE [Venezuelan Association for Language Teaching], 1997-1998).

ERIC Educational Resources Information Center

Rondon, Adolfo, Ed.; Serron, Sergio, Ed.

1998-01-01

These two issues of the journal "CLAVE" contain these articles in Spanish with one article in English: "La ensenanza de la lingua materna" (Pablo Arnaez); "Saben resumir los alumnos universitarios de nuevo ingreso?" (Marisol Garcia); "El desempeno en la escritura de cartas argumentativas y cuentos en alumnos de octavo grado" (Yolanda Perez, Maria…

Special Education in Mexico: One Community's Response.

ERIC Educational Resources Information Center

Shepherd, Terry L.; Contreras, Diana; Brown, Randel

2002-01-01

This article looks at the history of special education in Mexico, discusses the emergence of special education programs, and examines a school for special education in Nuevo Laredo, Tamaulipas. The school provides vocational training for students with a variety of disabilities and has a partnership with the local maquiladora industry. (Contains 5…

An Enrichment Program for Migrant Students: MENTE/UOP.

ERIC Educational Resources Information Center

Gilbert, Michael B.

The report describes the objectives and accomplishments of a summer enrichment program, Migrantes Envueltos en Nuevos Temas de Educacion/Migrants Engaged in New Themes in Education (MENTE), for promising and talented migrant high schoolers. The program is a cooperative one with a university. Students selected by a review committee are tested for…

Binarias en cúmulos abiertos: ?`Qué hay de nuevo?

NASA Astrophysics Data System (ADS)

Levato, H.

Las herramientas modernas para detectar duplicidad han jugado un papel fundamental en el resurgimiento del estudio de la binaridad en cúmulos abiertos. El fracaso de las teorías de bifurcación para explicar la formación de estrellas dobles ha puesto en consideración los encuentros de estrellas en cúmulos para formar binarias. Existen muchas pruebas empíricas que pueden realizarse para verificar las creencias actuales. En esta revisión del tema se hace un breve resumen de la historia del problema y se analiza el conocimiento actual. Se proponen las investigaciones y programas que darían lugar a la comprobación de las predicciones que surgen de considerar que las binarias en cúmulos se forman por encuentros.

Las Tierras de Nuevo Mexico. [The Lands of New Mexico.

ERIC Educational Resources Information Center

Swadesh, Frances Leon; And Others

New Mexico was inhabited thousands of years ago. Each group of settlers saw the land in distinct ways. For some, its beauty consisted of its quality, the abundance of water, and the hope of a good harvest. For others, its beautiful sites were of more importance. Thus, each group established its own manner of living on the land and of using it.…

Serologic survey in animals of 'Q' fever in Nuevo Leon.

PubMed

Salinas-Melédez, J A; Avalos-Ramírez, R; Riojas-Valdez, V; Kawas-Garza, J; Fimbres-Durazo, H; Hernández-Vidal, G

2002-01-01

The serological prevalence of Q fever in Mexico is unknown. A serological survey for Coxiella burnetii was undertaken on a randomly selected population of dairy cattle, beef cattle, goats and sheep flocks. Serological examination of animal sera for antibodies against Coxiella burnetii was carried out by the ELISA technique. The 28% of the dairy cattle and 10% of beef cattle examinated were antibody positive. Sera from goats and sheep also had antibodies against this rickettsia, 35% and 40% respectively.

Sustainable ranching: A new paradigm (Ganaderia Sustentable: Un Nuevo Paradigma)

Treesearch

Ivan Aguirre

2006-01-01

Today, rural communities need to take a new approach to decision-making and administration with regards to the causes and solutions to the processes of land deterioration. If the damages caused by drought, flood, and erosion were valued in monetary terms, opportunity costs, and value of human life, we would readily realize the benefits of investment in rural production...

Prevalence of rheumatic regional pain syndromes in adults from Mexico: a community survey using COPCORD for screening and syndrome-specific diagnostic criteria.

PubMed

Alvarez-Nemegyei, Jose; Peláez-Ballestas, Ingris; Rodríguez-Amado, Jacqueline; Sanin, Luz Helena; Garcia-Garcia, Conrado; Garza-Elizondo, Mario A; Loyola-Sanchez, Adalberto; Burgos-Vargas, Rubén; Goycochea-Robles, Maria-Victoria

2011-01-01

To assess the prevalence of rheumatic regional pain syndromes (RRPS) in 3 geographical areas of México using the Community Oriented Program in the Rheumatic Diseases (COPCORD) screening methodology and validate by expert consensus on case-based definitions. By means of an address-based sample generated through a multistage, stratified, randomized method, a cross-sectional survey was performed on adult residents (n = 12,686; age 43.6 ± 17.3 yrs; women 61.9%) of the states of Nuevo León, Yucatán, and México City. Diagnostic criteria for specific upper (Southampton group criteria) and lower limb (ad hoc expert consensus) RRPS were applied to all subjects with limb pain as detected by COPCORD questionnaire. The overall prevalence of RRPS was 5.0% (95% CI 4.7-5.4). The most frequent syndrome was rotator cuff tendinopathy (2.36%); followed by inferior heel pain (0.64%); lateral epicondylalgia (0.63%); medial epicondylalgia (0.52%); trigger finger (0.42%); carpal tunnel syndrome (0.36%); anserine bursitis (0.34%); de Quervain's tendinopathy (0.30%); shoulder bicipital tendinopathy (0.27%); trochanteric syndrome (0.11%); and Achilles tendinopathy (0.10%). There were anatomic regional variations in the prevalence of limb pain: Yucatán 3.1% (95% CI 2.5-3.6); Nuevo León 7.0% (95% CI 6.3-7.7); and México City 10.8% (95% CI 9.8-11.8). Similarly, the prevalence of RRPS showed marked geographical variation: Yucatán 2.3% (95% CI 1.8-2.8); Nuevo León 5.6% (95% CI 5.0-6.3); and México City 6.9% (95% CI 6.2-7.7). The overall prevalence of RRPS in México was 5.0%. Geographical variations raise the possibility that the prevalence of RRPS is influenced by socioeconomic, ethnic, or demographic factors.

The Role of Non-Formal Contexts in Teacher Education for STEM: The Case of Horno[superscript 3] Science and Technology Interactive Centre

ERIC Educational Resources Information Center

Fernández-Limón, Claudia; Fernández-Cárdenas, Juan Manuel; Gómez Galindo, Alma Adrianna

2018-01-01

Teacher education can benefit directly from experiences in non-formal settings. This article presents a research study with elementary teachers who were teaching in public schools in the state of Nuevo León, México, and participated in a STEM Continuous Professional Development (CPD) workshop. The workshop provided a platform for teachers to…

Rene Saldana's "The Jumping Tree": Exploring Childhood Universals through a Hispanic Novel

ERIC Educational Resources Information Center

Newman, Beatrice Mendez

2006-01-01

In "The Jumping Tree", set in Nuevo Penitas, an actual South Texas town, 12-year-old Rey Castaneda recounts landmark events in his journey toward becoming a man. Rey's stories of his childhood escapades, adventures, and everyday experiences could be anyone's childhood stories. When readers have finished the last page, they have relived the…

NATO Advanced Research Workshop. Toughening Mechanisms in Quasi-Brittle Materials, Held in Evanston, Illinois on July 16-20, 1990

DTIC Science & Technology

1990-07-20

Planas, J. and Elices, M., "Un Nuevo Mdtodo de An~lisis del Comportamiento Asint6tico de la Propagaci6n de una Fisura Cohesiva en Modo ", Anales de...crack in mode I loading", Report 87-02, Departamento de Ciencia de Materiales , ETS de Ingenieros de Caminos, Ciudad Universitaria, 28040 Madrid, Spain

Workshop Proceedings: Toughening Mechanisms in Quasi-Brittle Materials Held on 16-20 July 1990 in Evanston, Illinois

DTIC Science & Technology

1991-05-05

2] Planas, J. and Elices, M., "Un Nuevo Mdtodo de An6lisis del Comportamiento Asint6tico de la Propagaci6n de una Fisura Cohesiva en Modo I...cohesive crack in mode I loading", Report 87-02, Departamento de Ciencia de Materiales , ETS de Ingenieros de Caminos, Ciudad Universitaria, 28040 Madrid

78 FR 40821 - Bureau of Western Hemisphere Affairs, Executive Order 11423, as Amended; Notice of Receipt of...

Federal Register 2010, 2011, 2012, 2013, 2014

2013-07-08

... City of Laredo, Texas and Nuevo Laredo, Tamaulipas, Mexico. This application has been filed by the City..., 33 U.S.C. 535 et seq., and Executive Order 11423, dated August 16, 1968, as amended. The Department... application on or before August 7, 2013 to Mexico[email protected] or to Peter Marigliano, Border Affairs...

Amblyomma imitator Ticks as Vectors of Rickettsia rickettsii, Mexico

PubMed Central

Oliveira, Karla A.; Pinter, Adriano; Medina-Sanchez, Aaron; Boppana, Venkata D.; Wikel, Stephen K.; Saito, Tais B.; Shelite, Thomas; Blanton, Lucas; Popov, Vsevolod; Teel, Pete D.; Walker, David H.; Galvao, Marcio A.M.; Mafra, Claudio

2010-01-01

Real-time PCR of Amblyomma imitator tick egg masses obtained in Nuevo Leon State, Mexico, identified a Rickettsia species. Sequence analyses of 17-kD common antigen and outer membrane protein A and B gene fragments showed to it to be R. rickettsii, which suggested a potential new vector for this bacterium. PMID:20678325

Conservation implications of spur length variation in long-spur columbines (Aquilegia longissima)

Treesearch

Christopher J. Stubben; Brook G. Milligan

2007-01-01

Populations of long-spur columbine (Aquilegia longissima) with spurs 10-16 cm long are known only from a few populations in Texas, a historical collection near Baboquivari Peak, Arizona, and scattered populations in Coahuila, Chihuahua, and Nuevo Leon, Mexico. Populations of yellow columbine with spurs 7-10 cm long are also found in Arizona, Texas,...

Cryptococcus spp. isolation from excreta of pigeons (Columba livia) in and around Monterrey, Mexico.

PubMed

Canónico-González, Yolanda; Adame-Rodríguez, Juan Manuel; Mercado-Hernández, Roberto; Aréchiga-Carvajal, Elva Teresa

2013-01-01

The presence of Cryptococcus spp. has been reported in Mexico's capital city; however, to our knowledge there are no reports of its presence in the state of Nuevo León located in northeast Mexico. This is presumed to be because the hot and dry climate in this region does not favor cryptococcal proliferation. This study confirmed the presence of C. neoformans and C. albidus in 20% (10/50) of randomly selected fecal samples of pigeons (Columba livia) in the Monterrey metropolitan area. The presence of this yeast in the state of Nuevo León is proof of its adaptation to the typically hot climate of the area and is consistent with recent reviews of cryptococcosis cases in several local hospitals. The two species were identified and characterized through microbiological tests and molecular identification by DNA extraction and PCR amplification of highly conserved 18S ribosomal DNA using ITS1 and ITS2 as target regions. The PCR products were sequenced and compared with those reported in GenBank.

[Validation of a knowledge-questionnaire about asthma applied to teachers of elementary school of Monterrey, Mexico].

PubMed

González Diaz, Sandra Nora; Cruz, Alfredo Arias; González González, Arya Yannel; Félix Berumen, José Alfredo; Weinmann, Alejandra Macías

2010-01-01

asthma is one of the most common chronic childhood diseases; is increasing in prevalence and an important cause of school absenteeism. Previous studies have failed to evaluate knowledge about asthma among elementary school teachers worldwide because of the lack of validated questionnaires. to validate a questionnaire about asthma knowledge for elementary school teachers in Monterrey, Nuevo Leon. an observational, cross sectional, descriptive study, from February to December 2004, by applying a questionnaire to a group of elementary school teachers in Monterrey, Nuevo Leon. The questionnaire is a translation and adaptation to the questionnaire of 13 questions used to assess the knowledge about asthma among parents, according to the National Asthma Education Program of US. a total of 179 questionnaires were applied, in which 6 of the 13 questions were answered correctly by more than 90% of the teachers. The internal consistency reliability was adequate with a Cronbach a coefficient of 0.75. in order to obtain reliable data using questionnaires, these must undergo a validation process. Our questionnaire got validation because of the reliability shown according to the internal consistency analysis.

The Development of Spanish Airpower Doctrine (1910-1936)

DTIC Science & Technology

2002-04-01

in Spain, including civil and commercial airlines, social air mindedness, national industry, and military aviation. “Reorganización y nuevos ... Proyecto de Reorganización de la Sección y Dirección de Aeronáutica en un Centro único con el nombre de Dirección. Signed by Gen Francisco Echague, as

Reconsidering the conservation of monterey pine

Treesearch

Constance I. Millar

1998-01-01

Monterey pine (Pinus radiata) is a well known and much loved rare endemic of California and Raja California. Over the past two million years, its distribution has fluctuated regularly in response to climate change, Today, the species is contained in five small disjunct native populations: at Point Año Nuevo, the Monterey Peninsula, and Cambria in...

A tale of two cacti-the complex relationship between peyote (Lophophora williamsii) and endangered star cactus (Astrophytum asterias)

Treesearch

M. Terry; D. Price; J. Poole

2007-01-01

Astrophytum asterias, commonly called star cactus, is a federally listed endangered cactus endemic to the Tamaulipan thornscrub ecoregion of extreme southern Texas, USA, and Tamaulipas and Nuevo Leon, Mexico. Only three metapopulations totaling less than 4000 plants are presently known in Texas. Star cactus, known locally as “star peyote”, is highly...

Digital Portfolios: Documenting Student Growth

ERIC Educational Resources Information Center

Cramer, Matthew

2009-01-01

The digital portfolio process at Camino Nuevo High School (CNHS) offers an essential 21st century skill to students. All students are trained in basic web design to build and maintain their digital portfolios. These skills equip them with tools they will likely use in their future endeavors in college and the professional world. Teachers at CNHS…

Dominican Republic: Political and Economic Conditions and Relations with the United States

DTIC Science & Technology

2005-03-08

Killed in Dominican Republic Prison Fire,” The New York Times, March 8, 2008. 8 See Gerardo Reyes, “Esclavos en Paraíso,”El Nuevo Herald, Jan. 9... Perez , “Widespread Blackouts Leave President Scrambling to Boost Power,” Agence France-Presse, Feb. 8, 2000. 13 Jose de Cordoba, “Caribbean Cloud,”Wall

Measurement of the $Z$ transverse momentum distribution in $$\\bar{p} p \\to Z \\to e^+ e-$$ events with the D0 detector

DOE Office of Scientific and Technical Information (OSTI.GOV)

Magana-Mendoza, Leonel

1997-10-01

La medicion de la distribucion de momento longitudinal en eventos pmore » $$\\bar{p}$$ → Z → e +e -constituye una prueba para las parametrizaciones de las funciones de distribucion partonica, al mismo tiempo que proporciona un nuevo conjunto de datos que pueden ser empleados como parametros de entrada en los ajustes globales encaminados a mejorar dichas parametrizaciones.« less

Latin America Report: Tables of Contents, JPRS-LAM-85-OOl, 2 January 1985 - JPRS-LAM-85-O56, 28 June 1985.

DTIC Science & Technology

1985-08-13

in Chimalhuacan, by Luis Arturo Ramirez NICARAGUA PERU Sociologist Analyzes Religious Issue in Sandinist Revolution (Luis Serra; EL NUEVO DIARIO...Exemptions Described Housing Subsidy Explained COLOMBIA CUBA Ramirez Announces Betancur Travel Itinerary (Oscar Dominguez; Cadena Radial Super, 4 Feb 85...Export Reforms (EL TIEMPO, 2 Mar 85) 66 New INCORA Head Advocates Agrarian Reform (Fabio Callejas Ramirez ; Cadena Radial Super, 7 Mar 85

Cartel Car Bombings in Mexico

DTIC Science & Technology

2013-08-01

English and Spanish language media reports, Borderland Beat, available from www.borderlandbeat.com, Blog Del Naco, avail- able from...Departamento Administradora de Seguridad en Proceso de Supresión) DEA Drug Enforcement Administration DHS Department of Homeland...the official said in Spanish . ‘Car bombs have been employed in Nuevo Laredo, Monterrey, Victoria and the Tamaulipas coast city of Tampico, which

El nuevo panorama de la Dinámica Galáctica

NASA Astrophysics Data System (ADS)

Pivovaroff, Michael James

En general, la tendencia imperante en Dinámica Galáctica ha sido considerar que los movimientos estelares son básicamente regulares y que el caos no tiene mayor relevancia en los sistemas estelares. Sin embargo, en el último lustro se vienen acumulando pruebas de la importancia del movimiento caótico en ciertos sistemas estelares que existen en la naturaleza. Por una parte, sobre todo el grupo de David Merritt, lo ha mostrado en los casos de galaxias elípticas con concentraciones centrales de materia; por otra parte, en nuestro propio grupo, lo hemos mostrado para el caso de los satélites galácticos. Las consecuencias de estos hallazgos son tanto de tipo técnico, por la necesidad de construir modelos que contengan órbitas caóticas, como astrofísico, por los efectos del caos sobre la estacionariedad y evolución de los sistemas estelares en los que se presenta.

Nuevos rangos altitudinales para dos especies de la avifauna de Nicaragua

Treesearch

M.A. Torrez; Wayne Arendt; I. Castillo

2015-01-01

We document the elevational range expansions of two Nicaraguan bird species, scaled pigeon (Patagioenas speciosa) and collared plover (Charadrius collaris). The previously reported elevational range of Patagioenas speciosa was sea level to 600 m. We observed the species in shade coffee at Santa Maura farm at an elevation of 1115 masl. Historically, the second species,...

Laredo District Coahuila/Nuevo Leon/Tamaulipas border master plan : executive summary.

DOT National Transportation Integrated Search

2012-06-01

Border Master Plans, as defined and supported by the U.S./Mexico Joint Working : Committee on Transportation Planning and Programming, the Federal Highway Administration, : and the U.S. Department of State, are comprehensive long range plans to inven...

Information Sharing About International Terrorism in Latin America

DTIC Science & Technology

2005-06-01

articles/anmviewer.asp?a=464&print=yes. Somoza, L. (2001). Inteligencia: Su Utilidad para la Toma de Decisiones en un Mundo de Nuevos Conflictos...Terrorism Violence in Europe.” March 9-11, 2001, Minda de Gunzburg Center for European Studies, Harvard University, Cambridge, Massachusetts. 56...Taylor and Francis. Jane’s (2005). Terrorism and Insurgency Center. Fuerzas Armadas Revolucionarias de Colombia (FARC). Retrieved February 25, 2005

Use of black vulture (Coragyps atratus) in complementary and alternative therapies for cancer in Colombia: A qualitative study

PubMed Central

2012-01-01

Background Although Coragyps atratus has been used as a traditional therapy for patients with cancer, the scientific literature does not contain enough information on how this therapy is used or the mechanisms that explain this therapeutic practice. Objectives To understand the methods of use and the reasons given by patients and caregivers for the use of Coragyps atratus in cancer treatment. Methods This study used a qualitative design based on twenty in-depth interviews of patients with cancer or caregivers of patients with the disease. The analysis of the text was based on an inductive thematic approach. Results Resistance to disease and immune enhancement are properties attributed to Coragyps atratus when used for cancer treatment. The most recommended method of use is fresh blood ingestion, and the associated mechanism of action is transfer of immune factors to the individual who consumes it. Conclusions Use of Coragyps atratus as a treatment for cancer is a popular alternative therapy in Colombia. More studies are needed to understand the clinical effects of this intervention in cancer patients. Spanish abstract Introducción Aunque Coragyps atratus se usa tradicionalmente como terapia para pacientes con cáncer, no existe suficiente información en la literatura científica sobre su forma de utilización ni sobre los mecanismos explicativos que subyacen a esta práctica terapéutica. Objetivos Conocer métodos de utilización y mecanismos explicativos dados por los pacientes y cuidadores de pacientes sobre el uso de Coragyps atratus en el tratamiento del cáncer. Materiales y métodos Diseño cualitativo basado en veinte entrevistas en profundidad de pacientes con cáncer o cuidadores de pacientes con esta enfermedad. Análisis de texto basado en enfoque temático inductivo. Resultados Al Coragyps atratus se le atribuyen propiedades de resistencia y fortalecimiento del sistema inmune de personas enfermas de cáncer. La forma de utilización mas común es la

Cardiac Regeneration using Growth Factors: Advances and Challenges.

PubMed

Rebouças, Juliana de Souza; Santos-Magalhães, Nereide Stela; Formiga, Fabio Rocha

2016-09-01

Myocardial infarction is the most significant manifestation of ischemic heart disease and is associated with high morbidity and mortality. Novel strategies targeting at regenerating the injured myocardium have been investigated, including gene therapy, cell therapy, and the use of growth factors. Growth factor therapy has aroused interest in cardiovascular medicine because of the regeneration mechanisms induced by these biomolecules, including angiogenesis, extracellular matrix remodeling, cardiomyocyte proliferation, stem-cell recruitment, and others. Together, these mechanisms promote myocardial repair and improvement of the cardiac function. This review aims to address the strategic role of growth factor therapy in cardiac regeneration, considering its innovative and multifactorial character in myocardial repair after ischemic injury. Different issues will be discussed, with emphasis on the regeneration mechanisms as a potential therapeutic resource mediated by growth factors, and the challenges to make these proteins therapeutically viable in the field of cardiology and regenerative medicine. Resumo O infarto do miocárdio representa a manifestação mais significativa da cardiopatia isquêmica e está associado a elevada morbimortalidade. Novas estratégias vêm sendo investigadas com o intuito de regenerar o miocárdio lesionado, incluindo a terapia gênica, a terapia celular e a utilização de fatores de crescimento. A terapia com fatores de crescimento despertou interesse em medicina cardiovascular, devido aos mecanismos de regeneração induzidos por essas biomoléculas, incluindo angiogênese, remodelamento da matriz extracelular, proliferação de cardiomiócitos e recrutamento de células-tronco, dentre outros. Em conjunto, tais mecanismos promovem a reparação do miocárdio e a melhora da função cardíaca. Esta revisão pretende abordar o papel estratégico da terapia, com fatores de crescimento, para a regeneração cardíaca, considerando seu car

Evaluating consumer preferences for healthy eating from Community Kitchens in low-income urban areas: A discrete choice experiment of Comedores Populares in Peru.

PubMed

Buttorff, Christine; Trujillo, Antonio J; Diez-Canseco, Francisco; Bernabe-Ortiz, Antonio; Miranda, J Jaime

2015-09-01

Many low-income individuals from around the world rely on local food vendors for daily sustenance. These small vendors quickly provide convenient, low-priced, tasty foods, however, they may be low in nutritional value. These vendors serve as an opportunity to use established delivery channels to explore the introduction of healthier products, e.g. fresh salad and fruits, to low-income populations. We sought to understand preferences for items prepared in Comedores Populares (CP), government-supported food vendors serving low-income Peruvians, to determine whether it would be feasible to introduce healthier items, specifically fruits and vegetables. We used a best-worst discrete choice experiment (DCE) that allowed participants to select their favorite and least favorite option from a series of three hypothetical menus. The characteristics were derived from a series of formative qualitative interviews conducted previously in the CPs. We examined preferences for six characteristics: price, salad, soup, sides, meat and fruit. A total of 432 individuals, from two districts in Lima, Peru responded to a discrete choice experiment and demographic survey in 2012. For the DCE, price contributed the most to individual's utility relative to the other attributes, with salad and soup following closely. Sides (e.g. rice and beans) were the least important. The willingness to pay for a meal with a large main course and salad was 2.6 Nuevos Soles, roughly a 1 Nuevo Sol increase from the average menu price, or USD $0.32 dollars. The willingness to pay for a meal with fruit was 1.6 Nuevo Soles. Overall, the perceived quality of service and food served in the CPs is high. The willingness to pay indicates that healthier additions to meals are feasible. Understanding consumer preferences can help policy makers design healthier meals in an organization with the potential to scale up to reach a considerable number of low-income families. Copyright © 2015 Elsevier Ltd. All rights

Observaciones de fulguraciones en rayos X duros

NASA Astrophysics Data System (ADS)

Rovira, M. G.; Mandrini, C. H.

El objetivo principal de la investigación de las fulguraciones solares es el descubrimiento del proceso responsable de la impredecible, rápida y enorme, liberación de energía que ocurre en ellas. Las evidencias observacionales más claras de esta liberación son la emisión de rayos X y microondas. En particular, la detección de la emisión de rayos X duros (energías entre decenas y centenas de keV) es uno de los elementos de diagnóstico utilizados para comprender los mecanismos de aceleración y transporte de los electrones energéticos que, hoy es aceptado, son los que en su interacción con la atmósfera solar generan los rayos X observados. En 1991 se puso en órbita el Compton Gamma Ray Observatory (CGRO) uno de cuyos instrumentos observa las fulguraciones solares en el rango de energías 15 <= E <= 300 keV con una resolución temporal de 0.064 seg. En este trabajo analizamos, usando la Técnica de la Transformada Discreta en Onditas, algunos de los casos registrados para intentar separar y parametrizar las componentes de distinta escala de tiempo que se superponen durante la fase impulsiva de una fulguración. Discutimos nuestros resultados en términos de las características del mecanismo de liberación de energía.

Fotoexcitación de Moléculas Pequeñas

NASA Astrophysics Data System (ADS)

González Díaz, P. F.

El modelo estocástico no puede justificar la excitación multi-fotónica de moléculas pequeñas o muy simétricas. Basándonos en un escenario de interacción radiación-molécula cooperativo para la absorción de N-1 fotones IR por un sistema de N niveles, se especula que un posible mecanismo para la excitación no estocástica de moléculas pudiera ser la generación de procesos caóticos intra-moleculares.

Dust storm, northern Mexico

NASA Technical Reports Server (NTRS)

1983-01-01

This large dust storm along the left side of the photo, covers a large portion of the state of Coahuila, Mexico (27.5N, 102.0E). The look angle of this oblique photo is from the south to the north. In the foreground is the Sierra Madre Oriental in the states Coahuila and Nuevo Leon with the Rio Grande River, Amistad Reservoir and Texas in the background.

The William Perry Center for Hemispheric Defense Studies (The Perry Center)

Science.gov Websites

de usuario multilingüe para sus visitantes, y consolidará el contenido que solía extenderse a sites. * * * 21 septiembre, 2017 El Centro William J. Perry se complace en anunciar su nuevo hogar virtual. La nueva página, ubicada en [http://williamjperrycenter.org], ofrece una verdadera experiencia

Merida and Integrated Strategic Solutions

DTIC Science & Technology

2011-10-28

combination of these activities has bolstered the cartels’ earnings and their economic firepower.xxi The Mexican cartels currently dominate the U.S. illicit...creation of fifteen Module Police Units ( MPUs ) in the Mexican States of Nuevo Leon, Chihuahua, and Tamaulipas.lvii These MPUs have approximately 422...state and federal resources and facilities.lix Ultimately these MPUs will be valuable state-level law enforcement assets enhancing overall police

Metabolic syndrome prevalence among Northern Mexican adult population.

PubMed

Salas, Rogelio; Bibiloni, Maria del Mar; Ramos, Esteban; Villarreal, Jesús Z; Pons, Antoni; Tur, Josep A; Sureda, Antoni

2014-01-01

Dietary habits in the Mexican population have changed dramatically over the last few years, which are reflected in increased overweight and obesity prevalence. The aim was to examine the prevalence of metabolic syndrome (MetS) and associated risk factors in Northern Mexican adults aged ≥ 16 years. The study was a population-based cross-sectional nutritional survey carried out in the State of Nuevo León, Mexico. The study included a sub-sample of 1,200 subjects aged 16 and over who took part in the State Survey of Nutrition and Health-Nuevo León 2011/2012. Anthropometric measurements, physical activity, blood pressure and fasting blood tests for biochemical analysis were obtained from all subjects. The prevalence of MetS in Mexican adults aged ≥ 16 years was 54.8%, reaching 73.8% in obese subjects. This prevalence was higher in women (60.4%) than in men (48.9%) and increased with age in both genders. Multivariate analyses showed no evident relation between MetS components and the level of physical activity. Obese adults, mainly women, are particularly at risk of developing MetS, with the associated implications for their health. The increasing prevalence of MetS highlights the need for developing strategies for its early detection and prevention.

Desgarros del epitelio pigmentario de la retina: factores de riesgo, mecanismo y control terapéutico.

PubMed

Clemens, Christoph R; Eter, Nicole

2017-07-11

Los desgarros del epitelio pigmentario de la retina (EPR) se asocian en la mayoría de los casos con los desprendimientos vascularizados del EPR debido a una degeneración macular asociada a la edad (DMAE), y normalmente implican una pérdida adversa de la agudeza visual. Estudios recientes indican que ha habido un aumento en la incidencia de desgarros del EPR desde la introducción de fármacos anti-factor de crecimiento del endotelio vascular (anti-VEGF) así como una asociación temporal entre el desgarro y la inyección intravítrea. Dado que el número de pacientes con DMAE y el número de inyecciones anti-VEGF va en aumento, tanto la dificultad de prevenir desgarros del EPR como el tratamiento tras la formación de los desgarros han adquirido una mayor relevancia. De forma paralela, la evolución de la imagenología de la retina ha contribuido de manera significativa a comprender mejor el desarrollo de los desgarros del EPR en los últimos años. Esta revisión resume los conocimientos que se poseen actualmente sobre el desarrollo, los factores pronósticos y las estrategias terapéuticas de los desgarros del EPR antes y después de que estos se formen. © 2017 S. Karger AG, Basel.

Mecanismos de plasticidad (funcional y dependiente de actividad) en el cerebro auditivo adulto y en desarrollo

PubMed Central

Izquierdo, M.A.; Oliver, D.L.; Malmierca, M.S.

2010-01-01

Summary Introduction and development Sensory systems show a topographic representation of the sensory epithelium in the central nervous system. In the auditory system this representation originates tonotopic maps. For the last four decades these changes in tonotopic maps have been widely studied either after peripheral mechanical lesions or by exposing animals to an augmented acoustic environment. These sensory manipulations induce plastic reorganizations in the tonotopic map of the auditory cortex. By contrast, acoustic trauma does not seem to induce functional plasticity at subcortical nuclei. Mechanisms that generate these changes differ in their molecular basis and temporal course and we can distinguish two different mechanisms: those involving an active reorganization process, and those that show a simple reflection of the loss of peripheral afferences. Only the former involve a genuine process of plastic reorganization. Neuronal plasticity is critical for the normal development and function of the adult auditory system, as well as for the rehabilitation needed after the implantation of auditory prostheses. However, development of plasticity can also generate abnormal sensation like tinnitus. Recently, a new concept in neurobiology so-called ‘neuronal stability’ has emerged and its implications and conceptual basis could help to improve the treatments of hearing loss. Conclusion A combination of neuronal plasticity and stability is suggested as a powerful and promising future strategy in the design of new treatments of hearing loss. PMID:19340783

Two Faces of Attrition: Analysis of a Mismatched Strategy against Mexican and Central American Drug Traffickers

DTIC Science & Technology

2017-03-31

Washington Post , August 15, 2014. 30 William Kelleher Storey, The First World War: A concise Global History (USA, Maryland: Rowman & Littlefield, 2014...Hector became the de- facto leader to replace Arturo because of his familial relationship. The group’s operations continued to smuggling drugs because...through a “narco banner” hung across Nuevo Laredo’s Avenida Reforma reading “Los Zetas wants you, soldier or ex -soldier. We offer a good salary

Colombia’s Conflicts: The Spillover Effects of a Wider War

DTIC Science & Technology

2002-10-01

a summary of the history and impact of civil violence on Colombian history, see Comision de estudios sobre la violencia, Colombia: Violencia y...Brasilia pie acapos del Cartel de brasil,” El Nuevo Herald, March 27, 2001; Mendel, p. 7. 87. Quoted in Gentleman, pp. 28-29. 88. “Tracion en el mercado ...guerrilla groups, the leftist Revolutionary Armed Forces of Colombia (FARC) and Ejercito de Liberacion Nacional (ELN) and the rightist Auto Defensas

Anti-fungal and Anti-Mycobacterial activity of plants of Nuevo Leon, Mexico.

PubMed

Garza, Blanca Alicia Alanis; Arroyo, Joel López; González, Gloria González; González, Elvira Garza; González, Elvira Garza; de Torres, Noemí Waksman; Aranda, Ricardo Salazar

2017-01-01

Severe fungal infections, particularly those caused by Candida spp, have increased in recent decades and are associated with an extremely high rate of morbidity and mortality. Since plants are an important source of potentially bioactive compounds, in this work the antifungal activity of the methanol extracts of 10 plants (Acacia rigidula, Buddleja cordata, Cephalanthus occidentalis, Juglans nigra, Parkinsonia aculeata, Parthenium hysterophorus, Quercus canbyi, Ricinus communis, Salvia coccinea and Teucrium bicolor) were evaluated. The activity was evaluated according to the micro dilution assay described in CLSI M27-A protocol using some clinical isolates of different species of Candida (C. albicans, C. parapsilosis, C. tropicalis, C. krusei and C. glabrata). All extracts showed MIC values < 31.25μg/mL against at least one of the strains used, which is very interesting because it was crude extracts. Acacia rigidula (0.93-3.75μg/mL) and Quercus canbyi (0.93-7.5μg/mL) had antifungal activity against 7 strains with MIC values <8μg/mL in all cases. Furthermore excerpts activity against Mycobacterium tuberculosis (strain H37rv) was evaluated. Only Salvia coccinea and Teucrium bicolor showed MIC values125μg/mL by the method of MABA.

[Impact of health services, sanitation and literacy in the mortality of children under 5 years of age

PubMed

Gutiérrez, G; Reyes, H; Fernández, S; Pérez, L; Pérez-Cuevas, R; Guiscafré, H

1999-01-01

To analyze differences of the impact of health care services, sanitation and literacy on the mortality rates of children under five years of age, in two Mexican states with marked socioeconomic differences: Chiapas and Nuevo Leon. The study design was ecologic, based on a retrospective analysis of data published by the Health Ministry (Secretaría de Salud), National Institute of Statistics, Geography and Informatics (Instituto Nacional de Estadística, Geografía e Informática) and the National Population Council (Consejo Nacional de Población), on the tendencies of mortality among children under five years and on the changes of selected indicators corresponding to the period 1990-1997. ecologic study. This was based on a retrospective analysis of data published by Secretaría de Salud, Instituto Nacional de Estadística e Informática and Consejo Nacional de Población, about the tendencies of mortality among children under five years, and about the changes of selected indicators. The analysis was carried out in the period comprised between 1990-1997. For both states the registered variations were calculated and the trends were determined through analysis of simple linear regression; the independent variable corresponded to the study years. Partial correlation analysis between the various mortality trends studies and between and the selected indicators, were calculated. During the studied period there was a steady decline of children mortality, which was more marked in Chiapas. In both entities, this decrease was closely related to the decline in mortality due to acute diarrhea, and also correlated with a descent in measles and acute respiratory infections. In Chiapas, the indicators which correlated more significantly with this decline in mortality were vaccination coverage and literacy. In Nuevo Leon, the indicators with greater correlation were the increase in the number of nurses, of lodgings with piped water and vaccination coverage. During the analyzed

Evaluating Connectivity between Marine Protected Areas Using CODAR High-Frequency Radar

DTIC Science & Technology

2010-06-01

SMCA/SMR, (6) Big Creek SMCA/SMR, (7) Piedras Blancas SMCA/SMR, (8) Cambria SMCA/White Rock SMCA, (9) Pt. Buchon SMCA/SMR, and (10) Vandenberg SMR...52 grid- points, (7) Piedras Blancas 47 grid-points, (8) Cambria 20 grid-points, (9) Pt. Buchon 45 grid- points, and (10) the Vandenberg MPA had 62...COLUMN HEADERS. Back-projected from: (Sorted north- to-south) Año Nuevo Soquel Canyon Portuguese Ledge Point Lobos Point Sur Big Creek Piedras

AMSAHTS 󈨞: Advances in Materials Science and Applications of High Temperature Superconductors Held in Goddard Space Flight Center, Greenbelt, MD on April 2-6, 1990

DTIC Science & Technology

1991-01-01

Millhn, I. Rasines* Instituto de Ciencia de Materiales , CSIC Serrano 113, 28006 Madrid, Spain. J.A. Camps, Facultad de Ciencias Geol6gicas, UCM Ciudad...L2080-L2081, 1987. 28. J. Amador, M.T. Casais, C. Cascales, A. Castro and I. Rasines, "Sintesis y ca- racterizaci6n de nuevos 6xidos superconductores...Ciencia de Materiales (Spain) REICK, Franklin Fluoramics, Inc. REILEY, Don PTO/Mech/Gen Classification Gp ROMANOFSKY, Robert NASA Headquarters ROYTBURD, A

Proceedings of the International Workshop on Non-Crystalline Solids (3rd) Held in Matalascanas (Costa de la Luz), Spain on November 5-8, 1991. Trends in Non-Crystalline Solids,

DTIC Science & Technology

1992-01-01

line), and by Eq. 5 (broken line). 4. Acknowledgements Financial support has been provided by the "Plan Nacional de Nuevos Materiales " of the CICYT... Materiales , C. S. I. C. Universidad de Sevilla ’ World Scientific Singapore -New Jersey -London o Hong Kong Pubish. by World Scientific Publishing Co. Pte...V.E. Martin, J.M. Gonzd±lez Instituto de Ciencia de Materiales - CSIC. Serrano 144. 28006 Madrid, Spain and L. Schultz, K. Schnitzke Siemens AG

Sierra Madre Oriental in Coahuila, Mexico

NASA Technical Reports Server (NTRS)

2002-01-01

This desolate landscape is part of the Sierra Madre Oriental mountain range, on the border between the Coahuila and Nuevo Leon provinces of Mexico. This image was acquired by Landsat 7's Enhanced Thematic Mapper plus (ETM+) sensor on November 28, 1999. This is a false-color composite image made using shortwave infrared, infrared, and green wavelengths. The image has also been sharpened using the sensor's panchromatic band. Image provided by the USGS EROS Data Center Satellite Systems Branch

Metabolic Syndrome Prevalence among Northern Mexican Adult Population

PubMed Central

Salas, Rogelio; Bibiloni, Maria del Mar; Ramos, Esteban; Villarreal, Jesús Z.; Pons, Antoni; Tur, Josep A.; Sureda, Antoni

2014-01-01

Background and Aims Dietary habits in the Mexican population have changed dramatically over the last few years, which are reflected in increased overweight and obesity prevalence. The aim was to examine the prevalence of metabolic syndrome (MetS) and associated risk factors in Northern Mexican adults aged ≥16 years. Methods and Results The study was a population-based cross-sectional nutritional survey carried out in the State of Nuevo León, Mexico. The study included a sub-sample of 1,200 subjects aged 16 and over who took part in the State Survey of Nutrition and Health–Nuevo León 2011/2012. Anthropometric measurements, physical activity, blood pressure and fasting blood tests for biochemical analysis were obtained from all subjects. The prevalence of MetS in Mexican adults aged ≥16 years was 54.8%, reaching 73.8% in obese subjects. This prevalence was higher in women (60.4%) than in men (48.9%) and increased with age in both genders. Multivariate analyses showed no evident relation between MetS components and the level of physical activity. Conclusions Obese adults, mainly women, are particularly at risk of developing MetS, with the associated implications for their health. The increasing prevalence of MetS highlights the need for developing strategies for its early detection and prevention. PMID:25141255

Reverse smokers's and changes in oral mucosa. Department of Sucre, Colombia.

PubMed

Alvarez Gómez, Gloria-J; Alvarez Martínez, Efraín; Jiménez Gómez, Raúl; Mosquera Silva, Yolanda; Gaviria Núñez, Angela María; Garcés Agudelo, Adriana; Alonso Duque, Alexander; Zabala Castaño, Alexander; Echeverri González, Elizabeth; Isaac Millán, Melissa; Ramírez Ossa, Diana

2008-01-01

This work is intended to establish the prevalence of reverse smokers at the villages of Hato Nuevo, San Francisco and Cayo de Palma, Department of Sucre, Colombia, characterizing their socio-culture conditions, clinical and histological changes in the oral mucosa. A descriptive study was done through a home to home inquiry to select the people with inclusion criteria for a posterior clinical test and a biopsy of the affected oral mucosa. Reverse smokers's prevalence was from the 15%, mainly women (p<0.001) with an age average of 59.3 years. The lesions were classified clinically in mild, moderate and severe changes. Tongue moderate lesions presented the higher frequency (80%), followed by severe lesions on palate (74%). Oral cancer prevalence was 10.8% in the San Francisco village and 18.2% in Cayo de Palma village, no new cases were reported in Hato Nuevo village. This was the highest prevalence reported in comparison with other studies with similar population. The clinical and histological findings agree with the reported in literature, no relation was found between the degree of clinical severity and the dysplasia itself. Cases of oral submucous fibrosis-like lesions were found, which had never been reported in Latin America. Further studies are required in order to decrease the morbidity for this habit and to identify other related risk factors.

Water masses in the Monterey Bay during the summer of 2000

NASA Astrophysics Data System (ADS)

Warn-Varnas, Alex; Gangopadhyay, Avijit; Hawkins, J. A.

2007-06-01

Water masses in Monterey Bay are determined from the CTD casts of the Monterey Ocean Observing System (MOOS) Upper-water-column Science Experiment (MUSE) August 2000 dataset. It is shown through cluster analysis that the MUSE 2000 CTD dataset contains 5 water masses. These five water masses are: bay surface water (BSW), bay warm water (BWW), bay intermediate water (BIW), sub arctic upper water (SUW) and North Pacific deep water (NPDW). The BWW is a new water mass that exists in one area and is attributed to the effects of solar heating. The volumes occupied by each of the water masses are obtained. The BIW water is the most dominant water mass and occupies 68.8% of the volume. The statistical means and standard deviations for each water parameter, including spiciness and oxygen concentration, are calculated during separate upwelling and relaxed periods. The water mass content and structure are analyzed and studied during upwelling and a relaxed period. During upwelling, along a CTD track off Pt. Ano Nuevo, the water mass T, S distribution tended to be organized along three branches. Off Pt. Ano Nuevo the innovative coastal observation network (ICON) model showed the formation of a cyclonic eddy during the analyzed upwelling period. In time the eddy moved southwest and became absorbed into the southerly flow during the initial phases of the following wind-relaxed period.

Significance of Hemispheric Security for Mexico

DTIC Science & Technology

2003-04-07

WORD COUNT = 7,976 20 21 ENDNOTES 1 Eugenio Anguiano, “America Latina, en marcha hacia una nueva crisis,” El Universal, 20 Noviembre 2002 [newspaper...Preservacion de la Paz en el Ambito Hemisferico y el Proceso en Torno al Nuevo Concepto de la Seguridad. Organizacion de los Estados Americanos, 56o...Contra el Terrorismo los Avances Democráticos?” Washingtonpost.com, 27 Nov 2002; available from http://www.washingtonpost.com/ac2/wp- dyn/A46924-2002Nov27

First Record of the Asian Tiger Mosquito Aedes albopictus in Hidalgo State, Mexico.

PubMed

Ortega-Morales, Aldo I; Cueto-Medina, Sarai M; Rodríguez, Quetzaly K Siller

2016-09-01

The occurrence of the Asian tiger mosquito, Aedes albopictus , has been reported in the Mexican states of Tamaulipas, Nuevo León, Coahuila (northeastern), Veracruz, Chiapas, Quintana Roo (southeastern), Morelos, San Luis Potosí (middle), and Sinaloa (northwestern). In April and September 2012, Ae. albopictus was collected in a variety of habitats and landing/biting on the collecting personnel in 12 counties of Hidalgo state (middle). This is the first record of the occurrence of this species in Hidalgo state.

Trace-element abundances in several new ureilites

NASA Technical Reports Server (NTRS)

Boynton, William V.; Hill, Dolores H.

1993-01-01

Four new ureilites are analyzed for trace-element abundances. Frontier Mountain (FRO) 90054 is an augite-rich ureilite and has high rare earth element (REE) abundances with a pattern expected of augite. FRO 90036 and Acfer 277 have REE patterns similar to the V-shape pattern of other ureilites. Nuevo Mercurio (b) has very high REE abundances, but they look like they are due to terrestrial alteration. The siderophile-element pattern of these ureilites are similar to those of known ureilites.

Translations on Narcotics and Dangerous Drugs, Number 277

DTIC Science & Technology

1976-12-23

17 Nov 76) 17 MEXICO U. S. Demand Fosters Sinaloa Drug Production (EXCELSIOR, l6 Nov 76) 18 American Never Set Foot in Prison (EL DIARIO DE ...NUEVO LAREDO, 28 Oct 76) 20 Weapons, Poppies and Marihuana Fall to Army Campaign (EL SOL DE MEXICO, l6 Nov 76) 21 Charge No Action Taken...Against Drugs (EL DIARIO, 25 Oct 76) 22 Rafael Chavez Baldazo Arrested (EL DIARIO, 1 Nov 76) 23 ’Don Cuco’ Gang Smashed (DIARIO DE NOGALES

Contenedores: Aspectos tecnicos, biologicos y economicos

Treesearch

Tara Luna; Thomas D. Landis; R. Kasten Dumroese

2012-01-01

La elección del contenedor es una de las consideraciones más importantes al establecer un nuevo vivero o empezar a producir una especie nueva. El tipo y tamaño de contenedor no sólo determina la cantidad de agua y nutrientes minerales que están disponibles para el crecimiento de una planta, sino que también afecta otros aspectos operativos del vivero, como el tamaño de...

Border Environmental Education Resource Guide: Southern New Mexico, South Texas, Northern Chihuahua, Northern Coahuila, Northern Nuevo Leon, Northern Tamaulipas = Guia de Recursos de Educacion Ambiental en la Frontera: Sur de Nuevo Mexico, Sur de Texas, Norte de Chihuahua, Norte de Coahuila, Norte de Nuevo Leon, Norte de Tamaulipas.

ERIC Educational Resources Information Center

Meissner, David, Comp.

This guide provides educators and residents of the border with useful information about environmental education program offerings along the eastern half of the United States-Mexico border. The programs listed in the guide represent a broad range of educational efforts focused on understanding the environment and solving environmental problems in…

Origen y evolución de la estructura del Universo

NASA Astrophysics Data System (ADS)

García Lambas, D.

Se presenta una revisión de diversos tópicos vinculados a la evolución de estructuras en el Universo y se discuten los escenarios más aceptados para la comprensión de las irregularidades primigenias y de su evolución temporal. Se analizan evidencias observacionales de la naturaleza jerárquica en los mecanismos de formación de sistemas, tales como las indicaciones provenientes de las correlaciones espaciales y de velocidades, la naturaleza del Universo a alto redshift, y la habilidad de los modelos jerárquicos en predecir diversas propiedades dinámicas, fotométricas y químicas de las galaxias.

Taco Literacy: Public Advocacy and Mexican Food in the U.S. Nuevo South

ERIC Educational Resources Information Center

Alvarez, Steven

2017-01-01

This article describes a brief moment when the University of Kentucky (UK) became the national focus of conversations around food literacies for a writing class about tacos in the U.S. South. Author Steven Alvarez explains to "Munchies" writer Javier Cabral that taco literacy goes beyond an appreciation of tacos. Alvarez describes his…

[Prevalence of overweight and obesity in children from Monterrey, Nuevo León].

PubMed

Hernández-Herrera, Ricardo Jorge; Mathiew-Quirós, Álvaro; Díaz-Sánchez, Oscar; Reyes-Treviño, Norma Orelia; Álvarez-Álvarez, Criselda; Villanueva-Montemayor, Daniel; de la Garza-Salinas, Laura Hermila; González-Guajardo, Eduardo

2014-01-01

Pediatric obesity is a major health problem around the globe. It has increased in the last decades up to 30 % (in 2010). The aim of this study was to establish the prevalence of overweight and obesity in children from zero to 14 years from three family medicine units and one school. A prospective study of prevalence, which included children of both sexes who assisted to three family medicine units and a junior high school. We assessed the somatometry and compared it in accordance to the World Health Organization 2006-2007 references and standards. The overall overweight and obesity prevalence in 1624 children was 45.5 % (15.5 % of overweight and 29.9 % of obesity, respectively). A total of 354 of 840 women (42.1 %) and 385 of 784 men (49 %) had overweight and obesity (p < 0.05). In both sexes, we did not observed a difference in overweight (15.7, women; 15.4, men). However, with regards to obesity, women showed 26.4 versus 33.6 of men (p < 0.05). We observed only one family unit with major obesity prevalence, which probably had an initial overestimation. We found one of the highest prevalences of overweight and obesity in children at a national level: up to 45 % in a state of Mexican northwestern. Obesity doubled overweight, and it was almost 10 % higher in men than in women.

Resultados del relevamiento de HI en el Cielo Austral: 3. Relevamiento de Nubes de Alta Velocidad

NASA Astrophysics Data System (ADS)

Morras, R.; Bajaja, E.; Arnal, E. M.; Pöppel, W. G. L.

Los resultados del relevamiento de HI del Hemisferio Austral fueron reprocesados con el fin de incrementar su sensibilidad. Así, se utilizó esta nueva base de datos con el fin de obtener un nuevo relevamiento de Nubes de Alta Velocidad en el cielo austral. El ruido r.m.s. alcanzado es de 0.015-0.020 K, con una resolución espectral de 8 km/seg. El cubrimiento espacial del relevamiento mejora en un factor 16 al realizado por Bajaja et al (1985).

Bionomics of the Primary Malaria Vector, Anopheles pseudopunctipennis, in the Tapachula Foothill Area of Southern Mexico

DTIC Science & Technology

1992-02-04

GoozaJez 00. 1978. Programa de Emdicacion del Paludismo en Mexico y Nuevos Enfoques de su Estraltgia. Sal. Pub. Mex. XX(5):6I3-642. 51. Comision...Gutierrez, J, Neghme, A. 1949. Diez Anos de Lucha Antimalarica en Chile . Rev. Paras;IO!. Ch;le X(1): 5·24. 206. Nee J, Neghme, A. 1940...21): IOS-lI3. 211 . Paez R 1930. Indices Eptdemiologicos de Ia Malaria en el DeparwnenlO de Arica ( Chile ). Rev. InsL Bacterial., Chile 1:4148. 212

Mechanical behaviour of AlSiC nano composites produced by ball milling and spark plasma sintering =

NASA Astrophysics Data System (ADS)

Buchheim, Claudia Sofia de Andrade Redondo Murilhas

Neste trabalho foram produzidos nanocompositos de AlSiC misturando aluminio puro com nano particulas de SiC com diâmetro de 45 - 55 nm, usando, de forma sequencial, a tecnica da metalurgia do po e a compactacao por "Spark Plasma Sintering". O composito obtido apresentava graos com 100 nm de diâmetro, encontrandose as particulas de SiC localizadas, principalmente, nas fronteiras de grao. O nanocomposito sob a forma de provetes cilindricos foi submetido a testes de compressao uniaxial e a testes de nanoindentacao para analisar a influencia das nanoparticulas de SiC, da fracao volumica de acido estearico e do tempo de moagem, nas propriedades mecânicas do material. Para efeitos de comparacao, utilizouse o comportamento mecânico do Al puro processado em condicoes similares e da liga de aluminio AA1050O. A tensao limite de elasticidade do nanocomposito com 1% Vol./Vol. de SiC e dez vezes superior a do AA1050. O refinamento de grao a escala nano constitui o principal mecanismo de aumento de resistencia mecânica. Na realidade, o Al nanocristalino sem reforco de particulas de SiC, apresenta uma tensao limite de elasticidade sete vezes superior a da liga AA1050O. A adicao de 0,5 % Vol./Vol. e de 1 % Vol./Vol. de SiC conduzem, respetivamente, ao aumento da tensao limite de elasticidade em 47 % e 50%. O aumento do tempo de moagem e a adicao de acido estearico ao po durante a moagem conduzem apenas a um pequeno aumento da tensao de escoamento. A dureza do material medida atraves de testes de nanoindentacao confirmaram os dados anteriores. A estabilidade das microestruturas do aluminio puro e do nanocomposito AlSiC, foi testada atraves de recozimento de restauracao realizado as temperaturas de 150 °C e 250 °C durante 2 horas. Aparentemente, o tratamento termico nao influenciou as propriedades mecânicas dos materiais, excepto do nanocomposito com 1 % Vol./Vol. de SiC restaurado a temperatura de 250 °C, para o qual se observou uma reducao da tensao limite de elasticidade

The mental health care model in Brazil: analyses of the funding, governance processes, and mechanisms of assessment.

PubMed

Trapé, Thiago Lavras; Campos, Rosana Onocko

2017-03-23

This study aims to analyze the current status of the mental health care model of the Brazilian Unified Health System, according to its funding, governance processes, and mechanisms of assessment. We have carried out a documentary analysis of the ordinances, technical reports, conference reports, normative resolutions, and decrees from 2009 to 2014. This is a time of consolidation of the psychosocial model, with expansion of the health care network and inversion of the funding for community services with a strong emphasis on the area of crack cocaine and other drugs. Mental health is an underfunded area within the chronically underfunded Brazilian Unified Health System. The governance model constrains the progress of essential services, which creates the need for the incorporation of a process of regionalization of the management. The mechanisms of assessment are not incorporated into the health policy in the bureaucratic field. There is a need to expand the global funding of the area of health, specifically mental health, which has been shown to be a successful policy. The current focus of the policy seems to be archaic in relation to the precepts of the psychosocial model. Mechanisms of assessment need to be expanded. Analisar o estágio atual do modelo de atenção à saúde mental do Sistema Único de Saúde, segundo seu financiamento, processos de governança e mecanismos de avaliação. Foi realizada uma análise documental de portarias, informes técnicos, relatórios de conferência, resoluções e decretos de 2009 a 2014. Trata-se de um momento de consolidação do modelo psicossocial, com ampliação da rede assistencial, inversão de financiamento para serviços comunitários com forte ênfase na área de crack e outras drogas. A saúde mental é uma área subfinanciada dentro do subfinanciamento crônico do Sistema Único de Saúde. O modelo de governança constrange o avanço de serviços essenciais, havendo a necessidade da incorporação de um

Relation between Liver Transaminases and Dyslipidaemia among 2-10 y.o. Northern Mexican Children.

PubMed

Bibiloni, Maria Del Mar; Salas, Rogelio; Nuñez, Georgina M; Villarreal, Jesús Z; Sureda, Antoni; Tur, Josep A

2016-01-01

The increase in overweight and obese children may be linked to increased rates of liver damage and dyslipidaemia. This study aimed to explore the associations of liver biomarkers with overweight/obesity and dyslipidaemia in Mexican children. The study was a population-based cross-sectional nutritional survey carried out in the State of Nuevo León, Mexico. The study included a 414 subjects aged between 2 and 10 years old (47.8% girls) who took part in the State Survey of Nutrition and Health-Nuevo León 2011/2012. Associations between alanine aminotransferase (ALT) and aspartate aminotransferase (AST), ALT/AST ratio, and major components of serum lipid profile were assessed. Children with high ALT (defined as ≥P75) showed higher prevalence of dyslipidaemia than their counterparts, with high prevalence of high TChol (P = 0.053), non-HDL-chol, TG, and low HDL-chol. Children with an AST/ALT ≥T3 ratio were 0.43-times (95% CI: 0.25-0.74) and 0.27-times (95% CI: 0.17-0.44) low likely to be overweight/obese and to have dyslipidaemia than those with an AST/ALT

Observaciones del CH interestelar y el continuo en 3,3 GHz

NASA Astrophysics Data System (ADS)

Olano, C. A.; Combi, J. A.; Pöppel, W.; Benaglia, P.; Sanz, A. J.; Bava, J. A.

Se informa sobre el proyecto que se lleva a cabo en el IAR con el propósito de observar las líneas hiperfinas del estado fundamental del CH y el continuo en la banda de 3,3 GHz. El nuevo receptor construído en nuestro laboratorio para tal fin se instaló sobre uno de los radiotelescopios, funcionando conjuntamente con los sistemas de procesamiento actuales del IAR. Los resultados de las primeras observaciones, realizadas tanto en las líneas espectrales como en el continuo sobre fuentes conocidas, fueron satisfactorios.

Amphibians and reptiles of the state of San Luis Potosí, Mexico, with comparisons with adjoining states.

PubMed

Lemos-Espinal, Julio A; Smith, Geoffrey R; Woolrich-Piña, Guillermo A

2018-01-01

A summary of the species of amphibians and reptiles of the state has been compiled, including their geographic distributions, habitats, and conservation statuses. The herpetofauna of San Luis Potosí consists of 41 species of amphibians and 141 species of reptiles. San Luis Potosí shares the highest number of species with Hidalgo and Tamaulipas, and the least number of species with Nuevo León. In San Luis Potosí, there are several taxa of particular conservation concern including salamanders, emydid and trionychid turtles, anguid and xenosaurid lizards, and natricid and colubrid snakes.

Analisis de mecanismos alternos de coordinacion de la operacion en los puertos fronterizos entre Mexico y Estados Unidos.

DOT National Transportation Integrated Search

2001-12-01

Identificar los problemas de coordinacin Intersectoriales entre dependencias pblicas de Mxico, los problemas originados por la falta de Coordinacin Binacional en los Puertos Fronterizos y los costos que se derivan de estos problemas. Desarrol...

Estudio de la galaxia peculiar NGC 1487

NASA Astrophysics Data System (ADS)

Agüero, E. L.; Paolantonio, S.; Gunthardt, G.

La galaxia peculiar NGC 1487, cuya morfología sugiere un evento de ``merging" o interacción próxima, es estudiada en base a material observacional espectroscópico y fotométrico obtenido en el CASLEO. Mediante técnicas espectrofotométricas standards se determinan las principales características espectrales, los mecanismos de excitación actuantes, las condiciones físicas y las velocidades radiales de las estructuras conspicuas de la galaxia. Por otra parte, usando imágenes directas en las bandas B, V, R e I, se obtienen distribuciones detalladas de los colores B-V, V-R y R-I y detalles de su morfología.

Development of Educational Resources to Include the Teaching of Astronomy in the First Years of the Basic Education. (Spanish Title: Desarrollo de Recursos Pedagógicos Para Incluir la Enseñanza de la Astronomía en los Primeros Años de la Educación Básica.) Desenvolvimento de Recursos Pedagógicos Para Inserir o Ensino de Astronomia nas Séries Iniciais do Ensino Fundamental

NASA Astrophysics Data System (ADS)

da Silva Morett, Samara; de Oliveira Souza, Marcelo

2010-07-01

In this report will be presented the development of educational resources for the presentation of concepts of astronomy in the early grades of elementary school. This material is composed by presentations developed with the use of new technological resources, by the development of experiments and by the presentation of curiosities related to this field. The experiments were constructed with low cost material in order to allow the students involved to rework them in other occasions. The material presented aims to emphasize the relationship between Astronomy and the daily life of students. The inclusion of Astronomy in elementary school is a way to demonstrate to students how this area is present in an active way in their daily lives. The classes involved in the project participated in a survey with the aim of providing information about the prior knowledge they had about topics in astronomy that were considered during the project. With the experiments conducted, and the aid of new technologies, the astronomical concepts were presented to students of 4th and 5th years of basic education of a municipal school of Campos dos Goytacazes (RJ). After the presentations new data collections were carried out with the aim of verifying the level of learning obtained and it was observed that the method used was an important tool to aid the process of teaching and learning. The project obtained good results. En este informe se presenta el desarrollo de recursos pedagógicos para la presentación de los conceptos de la astronomía en los primeros grados de la escuela primaria. Este material consiste en las presentaciones hechas con el uso de nuevos recursos tecnológicos, haciendo experimentos y análisis de objetos de interés relacionados con este ámbito. Los experimentos fueron construidos con material de bajo costo a fin de que los estudiantes involucrados podrían rehacer en otras ocasiones. El material presentado tiene como objetivo destacar la relación entre la astronom

Relation between Liver Transaminases and Dyslipidaemia among 2-10 y.o. Northern Mexican Children

PubMed Central

Bibiloni, Maria del Mar; Salas, Rogelio; Nuñez, Georgina M.; Villarreal, Jesús Z.; Sureda, Antoni

2016-01-01

Background and Aims The increase in overweight and obese children may be linked to increased rates of liver damage and dyslipidaemia. This study aimed to explore the associations of liver biomarkers with overweight/obesity and dyslipidaemia in Mexican children. Methods The study was a population-based cross-sectional nutritional survey carried out in the State of Nuevo León, Mexico. The study included a 414 subjects aged between 2 and 10 years old (47.8% girls) who took part in the State Survey of Nutrition and Health–Nuevo León 2011/2012. Associations between alanine aminotransferase (ALT) and aspartate aminotransferase (AST), ALT/AST ratio, and major components of serum lipid profile were assessed. Results Children with high ALT (defined as ≥P75) showed higher prevalence of dyslipidaemia than their counterparts, with high prevalence of high TChol (P = 0.053), non-HDL-chol, TG, and low HDL-chol. Children with an AST/ALT ≥T3 ratio were 0.43-times (95% CI: 0.25–0.74) and 0.27-times (95% CI: 0.17–0.44) low likely to be overweight/obese and to have dyslipidaemia than those with an AST/ALT

Moving across the border: Modeling migratory bat populations

USGS Publications Warehouse

Ruscena, Wiederholt; López-Hoffman, Laura; Cline, Jon; Medellin, Rodrigo; Cryan, Paul M.; Russell, Amy; McCracken, Gary; Diffendorfer, Jay; Semmens, Darius J.

2013-01-01

The migration of animals across long distances and between multiple habitats presents a major challenge for conservation. For the migratory Mexican free-tailed bat (Tadarida brasiliensis mexicana), these challenges include identifying and protecting migratory routes and critical roosts in two countries, the United States and Mexico. Knowledge and conservation of bat migratory routes is critical in the face of increasing threats from climate change and wind turbines that might decrease migratory survival. We employ a new modeling approach for bat migration, network modeling, to simulate migratory routes between winter habitat in southern Mexico and summer breeding habitat in northern Mexico and the southwestern United States. We use the model to identify key migratory routes and the roosts of greatest conservation value to the overall population. We measure roost importance by the degree to which the overall bat population declined when the roost was removed from the model. The major migratory routes—those with the greatest number of migrants—were between winter habitat in southern Mexico and summer breeding roosts in Texas and the northern Mexican states of Sonora and Nuevo Leon. The summer breeding roosts in Texas, Sonora, and Nuevo Leon were the most important for maintaining population numbers and network structure – these are also the largest roosts. This modeling approach contributes to conservation efforts by identifying the most influential areas for bat populations, and can be used as a tool to improve our understanding of bat migration for other species. We anticipate this approach will help direct coordination of habitat protection across borders.

Análisis del futuro marco de referencia internacional

NASA Astrophysics Data System (ADS)

Cionco, G. R.; Arias, E. F.

La técnica de interferometría de muy larga línea de base (VLBI) se aplica hoy a la astrometría para el cálculo de posiciones precisas de radiofuentes extragalácticas. Por tratarse de objetos lejanos, sus movimientos propios aparentes pueden considerarse nulos; esta propiedad hace que los catálogos de radiofuentes extragalácticas VLBI constituyan la mejor materialización de un sistema de referencia celeste inercial definido cinemáticamente. La Unión Astronómica Internacional (IAU) recomendó la adopción de un nuevo sistema de referencia celeste internacional materializado por las coordenadas ecuatoriales de objetos extragalácticos observados con le técnica VLBI. Para superar la precisión astrométrica actual es necesaria una mejora en la modelización de aquellos fenómenos que pueden introducir desviaciones sistemáticas en el marco de referencia celeste. El objetivo de este trabajo es poner de manifiesto las sistematicidades presentes en los distintos marcos de referencia elaborados con el próposito de materializar el nuevo sistema de referencia celeste de la IAU. Para la comparación de los distintos marcos de referencia se propone un modelo de tres rotaciones diferenciales más un término lineal que procura absorber los efectos sistemáticos presentes en las coordenadas. Se analiza igualmente la estabilidad de la solución cuando se utilizan distintos conjuntos de objetos de definición.

BORDER EFFECTS ON DSM-5 ALCOHOL USE DISORDERS ON BOTH SIDES OF THE U.S.-MEXICO BORDER

PubMed Central

Cherpitel, Cheryl J.; Ye, Yu; Bond, Jason; Zemore, Sarah E.; Borges, Guilherme; Greenfield, Thomas K.

2015-01-01

Background Little epidemiological evidence exists on alcohol use and related problems along the U.S.-Mexico border, although the borderlands have been the focus of recent media attention related to the escalating drug/violence “epidemic”. In the present study the relationship of proximity of living at the border and alcohol use disorders (AUDs) is analyzed from the U.S.-Mexico Study on Alcohol and Related Conditions (UMSARC). Methods Household surveys were conducted on 2,336 Mexican Americans in Texas (771 in a non-border city and 1,565 from three border cities located in the three poorest counties in the U.S.) and 2,460 Mexicans from the states of Nuevo Leon and Tamaulipas in Mexico (811 in a non-border city and 1,649 from three cities which are sister cities to the Texas border sites). Results Among current drinkers, prevalence of AUD was marginally greater (p<0.10) at the U.S. border compared to the non-border, but the opposite was true in Mexico (p<0.001), and these trends continued on both sides across volume and 5+ drinking days. Prevalence was greater in Laredo/Nuevo Laredo relative to their respective sister city counterparts on the same side. Border effects appeared greater for males than females in the U.S. and the opposite in Mexico. Conclusion The data suggest that border proximity may affect AUD in both the U.S. and Mexico, but in the opposite direction, and may be related to the relative perceived or actual stress of living in the respective communities. PMID:25649987

Border effects on DSM-5 alcohol use disorders on both sides of the U.S.-Mexico border.

PubMed

Cherpitel, Cheryl J; Ye, Yu; Bond, Jason; Zemore, Sarah E; Borges, Guilherme; Greenfield, Thomas K

2015-03-01

Little epidemiological evidence exists on alcohol use and related problems along the U.S.-Mexico border, although the borderlands have been the focus of recent media attention related to the escalating drug/violence "epidemic". In the present study, the relationship of proximity of living at the border and alcohol use disorders (AUDs) is analyzed from the U.S.-Mexico Study on Alcohol and Related Conditions (UMSARC). Household surveys were conducted on 2336 Mexican Americans in Texas (771 in a non-border city and 1565 from three border cities located in the three poorest counties in the U.S.) and 2460 Mexicans from the states of Nuevo Leon and Tamaulipas in Mexico (811 in a non-border city and 1649 from three cities which are sister cities to the Texas border sites). Among current drinkers, prevalence of AUD was marginally greater (p<0.10) at the U.S. border compared to the non-border, but the opposite was true in Mexico (p<0.001), and these trends continued on both sides across volume and 5+ drinking days. Prevalence was greater in Laredo/Nuevo Laredo relative to their respective sister city counterparts on the same side. Border effects appeared greater for males than females in the U.S. and the opposite in Mexico. The data suggest that border proximity may affect AUD in both the U.S. and Mexico, but in the opposite direction, and may be related to the relative perceived or actual stress of living in the respective communities. Copyright © 2015 Elsevier Ireland Ltd. All rights reserved.

Boca de Potrerillos

NASA Astrophysics Data System (ADS)

Murray, William Breen

Boca de Potrerillos is an archaeological site located in the municipio of Mina, Nuevo León, about 60 km. northwest of Monterrey, Mexicós third largest city. Its principal feature is one of the largest concentrations of petroglyphs in the country. Archaeoastronomical features include petroglyphic markers of the cardinal directions, dot configurations which count lunar synodic periods, and one of the earliest horizon calendars in North America. They indicate that the site was probably used for sky observation from the Middle Archaic time period onward and may represent evidence of the initial stages in the development of Mesoamerican numeration and astronomy.

Amphibians and reptiles of the state of San Luis Potosí, Mexico, with comparisons with adjoining states

PubMed Central

Lemos-Espinal, Julio A.; Smith, Geoffrey R.; Woolrich-Piña, Guillermo A.

2018-01-01

Abstract A summary of the species of amphibians and reptiles of the state has been compiled, including their geographic distributions, habitats, and conservation statuses. The herpetofauna of San Luis Potosí consists of 41 species of amphibians and 141 species of reptiles. San Luis Potosí shares the highest number of species with Hidalgo and Tamaulipas, and the least number of species with Nuevo León. In San Luis Potosí, there are several taxa of particular conservation concern including salamanders, emydid and trionychid turtles, anguid and xenosaurid lizards, and natricid and colubrid snakes. PMID:29731682

Educación no formal

NASA Astrophysics Data System (ADS)

Tignanelli, H.

Se comentan en esta comunicación, las principales contribuciones realizadas en el campo de la educación en astronomía en los niveles primario, secundario y terciario, como punto de partida para la discusión de la actual inserción de los contenidos astronómicos en los nuevos contenidos curriculares de la EGB - Educación General Básica- y Polimodal, de la Reforma Educativa. En particular, se discuten los alcances de la educación formal y no formal, su importancia para la capacitación de profesores y maestros, y perspectivas a futuro.

The Impact of Drug Trafficking on the Socio Cultural Milieu of the Indigenous Population of Darien in the Republic of Panama

DTIC Science & Technology

2017-05-23

restricciones en su país de origen, en cuyo caso, la publicación posterior o venta de este manuscrito con derecho de autor no es permisible. ii REPORT ...condiciones del resto de las comarcas indígenas del país. Esto sería a su vez de gran beneficio para el país, porque se colocaría en un nuevo... de desarrollo a beneficio de estas etnias. La falta de interés hacia las poblaciones indígenas se ve reflejada en el mayor índice de pobreza del

Soluciones analiticas AL problema de jets con velocidad de eyeccion variable EN EL tiempo.

NASA Astrophysics Data System (ADS)

Canto, J.; Raga, A. C.; D'Alessio, P.

1998-11-01

Se presenta un nuevo metodo que permite resolver de manera exacta y analitica las ecuaciones que describen un jet hipersonico con velocidad de eyeccion variable en el tiempo. El metodo se basa en consideraciones sencillas de conservacion de momento para las superficies de trabajo que se forman en el interior del jet. Como ejemplo, se presentan soluciones para jets con variacion sinusoidal en la velocidad de eyeccion, y tambien para el caso de un incremento lineal en el tiempo. Estas soluciones analiticas tienen una clara aplicacion en la interpretacion de las observaciones de jets asociados a objetos Herbig-Haro.

Chemical and isotopic compositions in acid residues from various meteorites

NASA Technical Reports Server (NTRS)

Kano, N.; Yamakoshi, K.; Matsuzaki, H.; Nogami, K.

1993-01-01

We are planning to carry out systematic isotopic investigations of Ru, Mg, etc., in primordial samples. The investigations will be pursued in the context of a study of the pre-history of the solar system. It is hoped that the study will yield direct evidence for processes of nucleosynthesis in the pre-solar stage and detection of extinct radioactive nuclides. In this paper, we present the results of chemical compositions of acid residues obtained from three types of meteorites: Canyon Diablo (IA), Allende (CV3), and Nuevo Mercuro (H5); and the preliminary results of Ru isotopic compositions.

A Border Context of Violence: Mexican Female Sex Workers on the U.S.–Mexico Border

PubMed Central

Cepeda, Alice; Nowotny, Kathryn M.

2018-01-01

Female sex workers (FSW) represent a population confronted with an array of intersecting social problems. We explore the case of FSW in Nuevo Laredo and Ciudad Juarez to understand the everyday violence associated with sex work within the unique context of Mexico. Life history interviews were conducted with 109 FSW revealing violent acts by clients and other sex industry employees (bar owners, police, other FSW). The risk of violence by different types of persons associated with the sex work industry varied by venue and geographic area. Moreover, the violence was shaped by the social structural constraints of dominant gender ideologies. PMID:25409891

Acute Ethanol Intake Induces NAD(P)H Oxidase Activation and Rhoa Translocation in Resistance Arteries.

PubMed

Simplicio, Janaina A; Hipólito, Ulisses Vilela; Vale, Gabriel Tavares do; Callera, Glaucia Elena; Pereira, Camila André; Touyz, Rhian M; Tostes, Rita de Cássia; Tirapelli, Carlos R

2016-11-01

The mechanism underlying the vascular dysfunction induced by ethanol is not totally understood. Identification of biochemical/molecular mechanisms that could explain such effects is warranted. To investigate whether acute ethanol intake activates the vascular RhoA/Rho kinase pathway in resistance arteries and the role of NAD(P)H oxidase-derived reactive oxygen species (ROS) on such response. We also evaluated the requirement of p47phox translocation for ethanol-induced NAD(P)H oxidase activation. Male Wistar rats were orally treated with ethanol (1g/kg, p.o. gavage) or water (control). Some rats were treated with vitamin C (250 mg/kg, p.o. gavage, 5 days) before administration of water or ethanol. The mesenteric arterial bed (MAB) was collected 30 min after ethanol administration. Vitamin C prevented ethanol-induced increase in superoxide anion (O2-) generation and lipoperoxidation in the MAB. Catalase and superoxide dismutase activities and the reduced glutathione, nitrate and hydrogen peroxide (H2O2) levels were not affected by ethanol. Vitamin C and 4-methylpyrazole prevented the increase on O2- generation induced by ethanol in cultured MAB vascular smooth muscle cells. Ethanol had no effect on phosphorylation levels of protein kinase B (Akt) and eNOS (Ser1177 or Thr495 residues) or MAB vascular reactivity. Vitamin C prevented ethanol-induced increase in the membrane: cytosol fraction ratio of p47phox and RhoA expression in the rat MAB. Acute ethanol intake induces activation of the RhoA/Rho kinase pathway by a mechanism that involves ROS generation. In resistance arteries, ethanol activates NAD(P)H oxidase by inducing p47phox translocation by a redox-sensitive mechanism. O mecanismo da disfunção vascular induzido pelo consumo de etanol não é totalmente compreendido. Justifica-se, assim a identificação de mecanismos bioquímicos e moleculares que poderiam explicar tais efeitos. Investigar se a ingestão aguda de etanol ativa a via vascular RhoA/Rho quinase

El Sistema de Referencia Celeste convencional de la IAU

NASA Astrophysics Data System (ADS)

Arias, E. F.

La Unión Astronómica Internacional (IAU) recomendó la adopción de un nuevo sistema de referencia celeste baricéntrico cuyo plano fundamental y origen de ascensiones rectas estén próximos, respectivamente, al ecuador y equinoccio dinámicos J2000.0. El nuevo sistema de referencia estará materializado por las posiciones J2000.0 de radiofuentes extragalácticas determinadas con la técnica de interferometría de larga línea de base (VLBI). El Working Group on Reference Frames de la IAU (WGRF) decidió adoptar (Grasse, 1995) al sistema de referencia celeste extragaláctico del Servicio Internacional de la Rotación Terrestre (IERS) como futuro sistema de referencia celeste convencional bajo el nombre International Celestial Reference System (ICRS) y encomendó su mantenimiento futuro al IERS. El marco de referencia que materializará al ICRS contiene posiciones precisas J2000.0 de más de 600 radiofuentes extragalácticas. Las coordenadas fueron ajustadas en una única solución VLBI en la cual se incluyeron todas las observaciones realizadas hasta octubre de 1995 con la técnica de adquisición de datos VLBI Mark III. Para minimizar los errores sistemáticos que pueden afectar la calidad del marco de referencia se introdujeron mejoras sustanciales en la modelización y en la selección de datos. Un subconjunto de objetos del marco de referencia se utilizó para referir las posiciones estelares determinadas con el satélite astrométrico Hipparcos al ICRS.

HIV risk behaviors differ by workplace stability among Mexican female sex workers with truck driver clientele.

PubMed

Chen, Nadine E; Strathdee, Steffanie A; Rangel, Gudelia; Patterson, Thomas L; Uribe-Salas, Felipe J; Rosen, Perth; Villalobos, Jorge; Brouwer, Kimberly C

2012-12-28

In a study of female sex workers (FSW) servicing truck driver clients in Mexican border cities, we evaluated differences in HIV/STI risk behaviors by workplace. Cross-sectional study of FSW servicing truck drivers in Mexico: 100 from Nuevo Laredo (U.S. border); 100 from Ciudad Hidalgo (Guatemalan border). Main outcome was unstable workplace, defined as primary place of sex work in a public place (street, vehicle, gas station, etc.) vs. stable workplace (bar, brothel, and hotel). Logistic regression was used to identify correlates associated with trading sex at unstable workplaces in the last month. Of the FSW surveyed, 18% reported an unstable workplace. The majority of FSW surveyed were young (<30), single, had <9 th grade education, and had worked in the sex trade for a median of 4.9 years. After controlling for study site, FSW with unstable vs. stable workplaces were more likely to have a majority/all truck driver clientele, but were less likely to have visited a gynecologist in the last year (OR 0.1, 95%CI 0.03-0.4) or ever had an HIV test (OR 0.1, 95%CI 0.06-0.3), and there was a trend towards lower condom use self-efficacy scores (OR 0.8 per unit increase, 95%CI 0.7-1.0). On multivariate regression, unstable workplace was associated with having majority/all truck driver clientele, being surveyed in Nuevo Laredo, and decreased odds of ever having an HIV test. Among Mexican FSW with truck driver clients, providing safe indoor spaces for sex work may help facilitate public health interventions that improve HIV/STI and reproductive health outcomes.

Serum Lipid Profile, Prevalence of Dyslipidaemia, and Associated Risk Factors Among Northern Mexican Adolescents.

PubMed

Bibiloni, Maria Del Mar; Salas, Rogelio; De la Garza, Yolanda E; Villarreal, Jesus Z; Sureda, Antoni; Tur, Josep A

2016-11-01

The increase in overweight and obese children and adolescents may be linked to increased rates of dyslipidaemia. The aim was to assess the serum lipid profile, the prevalence of dyslipidaemia, and associated risk factors among the North Mexican adolescent population. Two hundred and ninety-three subjects (47.8% girls) ages 11 to 16 years took part in the Nuevo León State Survey of Nutrition and Health 2011-2012. According to the 2011 Expert Panel on Integrated Guidelines for Cardiovascular Health and Risk Reduction in Children and Adolescents, dyslipidaemia was defined as a presence of ≥1 of the following levels (mg/dL): Total cholesterol ≥200, low-density lipoprotein cholesterol ≥130, non-high-density lipoprotein cholesterol <40, and triglyceride ≥130. The overall frequency of dyslipidaemia was 48.8% with no differences between sexes. Adolescents with high body mass index were more likely to have at least 1 abnormal lipid level (overweight: odds ratio [OR]: 2.07; 95% confidence interval [CI]: 1.14-3.77, P < 0.05; obesity: OR: 2.21, 95% CI: 1.11-4.41, P < 0.05) than those with normal weight. Abdominally subjects with obesity were also more likely to have at least 1 abnormal lipid level (OR: 2.30; 95% CI: 1.35-3.91, P < 0.01) than their leaner counterparts. Half of Mexican adolescents living in the State of Nuevo León have at least 1 abnormal lipid concentration. Low HDL-chol level was the most common dyslipidaemia. Body mass index and abdominal obesity were associated with the prevalence of at least 1 abnormal lipid level.

A new genus of pine-feeding Cochylina from the western United States and northern Mexico (Lepidoptera: Tortricidae: Euliini).

PubMed

Brown, John W

2013-01-01

Eupinivora, new genus, is described and illustrated from the montane regions of western United States (Nevada, Utah, Wyoming, Colorado, Arizona, New Mexico, and Texas) and Mexico (Nuevo León, Durango, and Estado de Mexico). As presently defined, the genus includes seven species: E. ponderosae, n. sp. (USA: Arizona) (type species); E angulicosta, n. sp. (Mexico: Nuevo León); E. albolineana, n. sp. (Mexico: Durango); E. thaumantias (Razowski, 1994), n. comb. (Mexico: Estado de Mexico); E. hamartopenis (Razowski, 1986), n. comb. (Mexico: Durango); E. unicolora, n. sp. (Mexico: Durango); and E. rufofascia, n. sp. (Mexico: Durango). The new genus is most closely related to Henricus Busck, 1943, from which it can be distinguished by the short upturned labial palpi, the presence of a variable cluster of long spine-like external setae from near the middle of the phallus in the male genitalia, the absence of cornuti in the vesica, the absence of the subgenital sex scales in the male, and a forewing pattern that in most of the included species is reminiscent of that of Argyrotaenia ponera Walsingham and its relatives. Four of the new species were reared from the cones of Pinus arizonica var. cooperi Blanco (Pinaceae) and one from Pinus ponderosa P. & C. Lawson; all of the species occur in habitats dominated by conifers at elevations between ca. 1700 and 2750 m. Two specimens from New Mexico were collected in traps baited with a synthetic pheromone for the bud worm Choristoneura lambertiana (Busck, 1915) (Archipini)-90% 92:8E:Z11-14AC, 10% 90:10E:Z11OH--which is consistent with that recorded for other Cochylina.

HIV Risk Behaviours Differ by Workplace Stability Among Mexican Female Sex Workers With Truck Driver Clientele

PubMed Central

Chen, Nadine E.; Strathdee, Steffanie A.; Rangel, Gudelia; Patterson, Thomas L.; Uribe-Salas, Felipe J.; Rosen, Perth; Villalobos, Jorge; Brouwer, Kimberly C.

2012-01-01

Background In a study of female sex workers (FSWs) servicing truck driver clients in Mexican border cities, we evaluated differences in HIV/STI risk behaviours determined by workplace. Design and Methods Our study was cross-sectional and its population comprised 100 FSWs from Nuevo Laredo (US border) and 100 FSWs from Ciudad Hidalgo (Guatemalan border). The main outcome was primary place of sex work defined as unstable (street, vehicle, gas station, etc.) vs stable (bar, brothel, and hotel). Logistic regression was used to identify correlates associated with trading sex at unstable workplaces in the last month. Results Of the FSWs surveyed, 18% reported an unstable workplace. The majority of FSWs surveyed were young (<30 years), single, had <9th grade education, and had worked in the sex trade for a median of 4.9 years. After controlling for study site, FSWs with unstable vs stable workplaces were more likely to have a majority/all truck driver clientele, but were less likely to have visited a gynaecologist in the last year (OR 0.1, 95% CI 0.03-0.4) or ever had an HIV test (OR 0.1, 95% CI 0.06-0.3), and there was a trend towards lower condom use self-efficacy scores (OR 0.8 per unit increase, 95% CI 0.7-1.0). On multivariate regression, unstable workplace was associated with having majority/all truck driver clientele, being surveyed in Nuevo Laredo, and decreased odds of ever having an HIV test. Conclusions Among Mexican FSWs with truck driver clients, providing safe indoor spaces for sex work may help facilitate public health interventions that improve HIV/STI prevention and reproductive health outcomes. PMID:24724056

Investigação dos perfís temporais de alta resolução de explosões solares tipo-III decimétricas

NASA Astrophysics Data System (ADS)

Cecatto, J. R.; Fernandes, F. C. R.; Sawant, H. S.; Madsen, F. R. H.

2003-08-01

Explosões solares tipo-III indicam a presença de feixes de elétrons acelerados durante "flares" solares. Sua investigação fornece informações tanto sobre os processos de aceleração de partículas quanto das características do agente causador e do local de aceleração. Explosões tipo-III decimétricas são geradas por feixes de elétrons viajando através de arcos magnéticos densos da baixa coroa solar. Os perfís temporais destes fenômenos, quando tomados com alta resolução, informam sobre os mecanismos de aceleração de partículas do feixe e o meio de transporte da energia liberada a partir da região de aceleração. Usando o Brazilian Solar Spectroscope (BSS), em operação no INPE, foram registradas dezenas de explosões tipo-III decimétricas, dentro da faixa de 2050-2250 MHz com alta resolução temporal (20 ms), em 13 de setembro de 2001, entre 13:00 e 16:10 UT. Foram selecionadas 10 explosões isoladas para uma investigação estatística detalhada de seus perfís temporais, em todos os cerca de 50 canais de freqüência. Os resultados indicam que cerca de 70% dos perfís temporais são complexos tanto durante a subida quanto descida. Os 30% restantes indicam que os perfís da subida podem ser bem representados, na maioria dos casos, por um processo não-linear e uma parcela significativa por processos lineares. Os perfís temporais da descida são dominados por um decaimento não-linear. Neste trabalho, será efetuada uma análise dos perfís temporais, tanto durante a subida quanto descida do fluxo, para as explosões selecionadas, em termos dos prováveis mecanismos de aceleração e relaxamento. 2

Eficacia de la detección sistemática de la gripe en las fronteras en los viajeros que llegan por vía aérea*

PubMed Central

Priest, Patricia C.; Jennings, Lance C.; Duncan, Alasdair R.; Brunton, Cheryl R.; Baker, Michael G.

2015-01-01

Objetivos. Se midieron los síntomas y la prevalencia de la gripe (también llamada influenza), así como la eficacia del mecanismo de detección sistemática basado en los síntomas y la temperatura para diagnosticar la gripe en viajeros internacionales que llegaban por vía aérea. Métodos. El presente estudio transversal recopiló datos de viajeros que llegaron al aeropuerto internacional de Christchurch (Nueva Zelandia) en el invierno del 2008 mediante un cuestionario de salud, medición de la temperatura y toma de muestras de las vías respiratorias. Resultados. De los viajeros, 15 976 (68%) entregaron los formularios completos. De ellos, 17% notificaron al menos un síntoma de gripe; los síntomas más comunes fueron rinorrea o congestión nasal (10%) y tos (8%). Se tomaron muestras de las vías respiratorias de 3 769 viajeros. La prevalencia estimada de la gripe fue de 1,1% (4% en las personas sintomáticas, 0,2% en las asintomáticas). La sensibilidad de los criterios de detección varió de 84% para “cualquier síntoma” a 3% para la fiebre de 37,8 °C o mayor. El valor predictivo positivo fue bajo para todos los criterios. Conclusiones. El método de detección sistemática en las fronteras mediante la autonotificación de síntomas y la toma de la temperatura presenta limitaciones para impedir que una gripe pandémica entre en un país. Basarse en criterios como “cualquier síntoma” o la tos haría que se investigara a varias personas no infectadas, mientras que algunas personas infectadas pasarían inadvertidas. Si se usaran criterios más específicos como la fiebre, la mayoría de las personas infectadas entrarían en el país a pesar del mecanismo de detección.

Nuevos patrones en el gobierno de los colegios (New Patterns of School Governance). ERIC Digest.

ERIC Educational Resources Information Center

Renchler, Ron

This digest in Spanish explains why public-school governance is receiving increasing scrutiny. It identifies who is held accountable for results in the current governance system and describes recent proposals for transforming governance structures. Since many reforms of the past decade bypassed the school board and district office, reformers are…

Nuevos aspectos en el estudio de la particula D en el experimento FOCUS de Fermilab

DOE Office of Scientific and Technical Information (OSTI.GOV)

Quinones Gonzalez, Jose A.; /Puerto Rico U., Mayaguez

The purpose of this work is to improve the reconstruction techniques of the decays of the particles that contain charm in the quark composition using the information of the Target Silicon Detector of the experiment E831 (FOCUS). That experiment runs during 1997 to 1998 in Fermilab National Laboratory. The objective of the experiment was improving the understanding of the particles that contain charm. Adding the Target Silicon Detector information in the reconstruction process of the primary vertex the position error. This reduction produces an improvement in the mass signal and the knowledge of the charm particles properties. This ad tomore » the possibility's that in other analysis will use the techniques developed in this work.« less

Proyecto para la medición sistemática de seeing en CASLEO

NASA Astrophysics Data System (ADS)

Fernández Lajus, E.; Forte, J. C.

La calidad del seeing astronómico es ciertamente uno de los parámetros mas importantes que caracterizan el sitio de un observatorio. Por tanto se desea determinar si el alto valor de seeing observado con el telescopio de 2.15 m se debe a efectos internos y/o del entorno a la cupula o si se debe simplemente al seeing propio del lugar. El actual mecanismo de refrigeración del espejo primario del 2.15, parece haber mejorado notablemente la calidad del seeing. Sin embargo se hace necesario saber hasta que punto el valor del seeing puede ser mejorado. La primera etapa del proyecto consistió en la puesta a punto del telescopio emplazado para este propósito y la adquisición de las primeras medidas tentativas de seeing.

A border context of violence: Mexican female sex workers on the U.S.-Mexico border.

PubMed

Cepeda, Alice; Nowotny, Kathryn M

2014-12-01

Female sex workers (FSW) represent a population confronted with an array of intersecting social problems. We explore the case of FSW in Nuevo Laredo and Ciudad Juarez to understand the everyday violence associated with sex work within the unique context of Mexico. Life history interviews were conducted with 109 FSW revealing violent acts by clients and other sex industry employees (bar owners, police, other FSW). The risk of violence by different types of persons associated with the sex work industry varied by venue and geographic area. Moreover, the violence was shaped by the social structural constraints of dominant gender ideologies. © The Author(s) 2014.

Discusión de las aproximaciones utilizadas en el estudio de la recombinación dielectrónica de los metales en envolturas estelares

NASA Astrophysics Data System (ADS)

Cruzado, A.; di Rocco, H. O.; Ringuelet, A.

Se calcularon nuevos parámetros atómicos del MgI reemplazando los niveles de energía teóricos por los observados. Con ellos se calculó nuevamente el flujo originado en la Recombinación Dielectrónica (RD) del MgII y se comparó con resultados anteriores. Se evaluó también la posible influencia de diferentes fuentes de opacidad, en el flujo originado en la RD de los metales en atmósferas extendidas de estrellas tempranas. En particular, se calculó la profundidad óptica de las líneas de MgI para diferentes condiciones físicas del medio.

Results of the 2015 Mexican Asteroid Photometry Campaign

NASA Astrophysics Data System (ADS)

Sada, Pedro V.; Navarro-Meza, Samuel; Reyes-Ruiz, Mauricio; Olguin, Lorenzo L.; Saucedo, Julio C.; Loera-Gonzalez, Pablo

2016-04-01

The 2015 Mexican Asteroid Photometry Campaign was organized at the 2nd National Planetary Astrophysics Workshop held in 2015 March at the Universidad Autónoma de Nuevo León in Monterrey, México. Three asteroids were selected for coordinated observations from several Mexican observatories. We report full lightcurves for the main-belt asteroid 1084 Tamariwa (P = 6.195 ± 0.001 h) and near-Earth asteroid (NEA) 4055 Magellan (P = 7.479 ± 0.001 h). Asteroid 1466 Mundleria was also observed on eight nights but no lightcurve was obtained because of its faintness, a crowded field-of-view, and low amplitude (<0.03 mag).

Neurobiología del autismo y TDAH mediante técnicas de neuroimagen: divergencias y convergencias

PubMed Central

Proal, Erika; Olvera, Jorge González; Blancas, Aurea S.; Chalita, Pablo J.; Castellanos, F. Xavier

2013-01-01

En el área clínica algunos síntomas del trastorno por déficit de atención e hiperactividad (TDAH), se presentan en los pacientes con trastorno del espectro autista (TEA). Se ha demostrado que existen alteraciones en circuitos cerebrales que impactan en fallas cognitivas y de comportamiento específicas de cada uno de estos trastornos. Sin embargo, han sido poco estudiados los correlatos cerebrales que hay detrás tanto de las similitudes como de las diferencias sintomatológicas. En la presente revisión se analizaron los estudios meta-analíticos existentes estructurales y funcionales en TDAH y TEA. Por un lado, se observaron convergencias en circuitos como el dorsal atencional, de funciones ejecutivas, visual, somatomotor y circuito de activación por defecto. Estas similitudes posiblemente explican las manifestaciones comórbidas entre los trastornos como la falla en la integración de información, motricidad fina y procesos atencionales específicos. Por otro lado, específicamente en el TDAH se observan déficits en el circuito de recompensa y ventral atencional, sistemas involucrados en la medición de efectos de reforzamiento y monitoreo atencional. En TEA los circuitos más afectados fueron los implicados en procesos de cognición social y lenguaje. En conclusión, existen correlatos neuronales en TEA que explican las manifestaciones clínicas tanto convergentes como divergentes presentes en TDAH. PMID:23897144

Astronomy at School: Measurements of the Earth-Moon Distance. (Spanish Title: Astronomía en la Escuela: Medición de la Distancia Tierra-Luna.) Astronomia na Escola: Medida da Distância Terra-Lua

NASA Astrophysics Data System (ADS)

Paolantonio, Santiago; Pintado, Olga I.

2006-12-01

The aim of this project is to approach High School students to Science. We propose to measure the Earth-Moon distance using the parallax. The observation and measurements techniques and all the calculations needed are described in this paper. The results obtained in a test experience realized during 2003 are presented. This test shows that this is a feasible project and also shows which things needed to be improved. Se plantea la propuesta de un proyecto educativo dirigido al Nivel Medio de enseñanza, consistente en la determinación de la distancia Tierra - Luna por paralaje. Se describen las técnicas de observación, mediciones y cálculos. Se proporcionan a continuación los resultados obtenidos en la experiencia piloto realizada en el 2003, la que permitió comprobar la factibilidad de llevar a cabo la propuesta, así como perfeccionar los diferentes aspectos involucrados en la misma. Propomos neste trabalho um projeto educativo dirigido ao Ensino Médio que consiste na determinação da distância Terra-Lua pelo efeito da paralaxe. As técnicas de observação, medidas e cálculos auxiliares são descritos, e os resultados obtidos numa experiência-teste realizada no ano de 2003 apresentados. Este último teste permitiu comprovar a viabilidade de execução da proposta e aperfeiçoar diversos aspectos da mesma.

Culture-bound syndromes in migratory contexts: the case of Bolivian immigrants.

PubMed

Roldán-Chicano, María Teresa; Fernández-Rufete, José; Hueso-Montoro, César; García-López, María Del Mar; Rodríguez-Tello, Javier; Flores-Bienert, María Dolores

2017-07-10

ís de origem, são mantidas pelo grupo estudado. As formas de cuidado para esses problemas de saúde são adaptadas aos recursos do novo contexto e baseadas em interações com o ambiente doméstico, a biomedicina e a medicina tradicional. Foi constatada a necessidade de que os profissionais de saúde reconheçam que a eficácia de determinadas terapias se dá no âmbito das crenças culturais e não no âmbito da comprovação científica. describir los síndromes de filiación cultural que mantienen los inmigrantes bolivianos en el nuevo contexto migratorio y analizar los procesos de atención de estos padecimientos. diseño de investigación de carácter cualitativo con enfoque metodológico etnográfico. Muestra: 27 inmigrantes bolivianos. Las estrategias para recoger datos fueron las entrevistas en profundidad y la observación participante. Los datos se categorizaron y ordenaron en esquemas lógicos manualmente y a través del programa ATLAS-ti v.5. el susto, los "wayras", el amartelo, el pasmo de sol, el pasmo de luna y el pasmo de sereno son algunos de los síndromes de carácter folk que los inmigrantes bolivianos padecen y tratan en el nuevo contexto migratorio. en el nuevo entorno, el colectivo estudiado mantiene síndromes de filiación cultural comunes en su país de origen. Las formas de atención de éstos padecimientos se adaptan a los recursos del nuevo contexto y se basan en transacciones con el ámbito doméstico, la biomedicina y la medicina tradicional. Se constata la necesidad de que el profesional sanitario reconozca que la efectividad percibida de ciertas terapias opera dentro del ámbito de las creencias culturales y no en el de la evidencia científica.

Time differences in the formation of meteorites as determined from the ratio of lead-207 to lead-206

USGS Publications Warehouse

Tatsumoto, M.; Knight, R.J.; Allegre, C.J.

1973-01-01

Measurements of the lead isotopic composition and the uranium, thorium, and lead concentrations in meteorites were made in order to obtain more precise radiometric ages of these members of the solar system. The newly determined value of the lead isotopic composition of Canyon Diablo troilite is as follows: 206Pb/204Pb = 9.307, 207Pb/204Pb = 10.294, and 208Pb/204Pb = 29.476. The leads of Angra dos Reis, Sioux County, and Nuevo Laredo achondrites are very radiogenic, the 206Pb/204Pb values are about 200, and the uranium-thorium-lead systems are nearly concordant. The ages of the meteorites as calculated from a single-stage 207Pb/206Pb isochron based on the newly determined primordial lead value and the newly reported 235U and 238U decay constants, are 4.528 ?? 10 9 years for Sioux County and Nuevo Laredo and 4.555 ?? 10 9 years for Angra dos Reis. When calculated with the uranium decay constants used by Patterson, these ages are 4.593 ?? 109 years and 4.620 ?? 109 years, respectively, and are therefore 40 to 70 ?? 106 years older than the 4.55 ?? 109 years age Patterson reported. The age difference of 27 ?? 106 years between Angra dos Reis and the other two meteorites is compatible with the difference between the initial 87Sr/86Sr ratio of Angra dos Reis and that of seven basaltic achondrites observed by Papanastassiou and Wasserburg. The time difference is also comparable to that determined by 129I-129Xe chronology. The ages of ordinary chondrites (H5 and L6) range from 4.52 to 4.57 ?? 109 years, and, here too, time differences in the formation of the parent bodies or later metamorphic events are indicated. Carbonaceous chondrites (C2 and C3) appear to contain younger lead components.

Association of Trypanosoma cruzi infection with risk factors and electrocardiographic abnormalities in northeast Mexico

PubMed Central

2014-01-01

Background American trypanosomiasis is a major disease and public health issue, caused by the protozoan parasite Trypanosoma cruzi. The prevalence of T. cruzi has not been fully documented, and there are few reports of this issue in Nuevo Leon. The aim of this study was to update the seroprevalence rate of T. cruzi infection, including an epidemiological analysis of the risk factors associated with this infection and an electrocardiographic (ECG) evaluation of those infected. Methods Sera from 2,688 individuals from 10 municipalities in the state of Nuevo Leon, Mexico, were evaluated using an enzyme-linked immunosorbent assay and an indirect hemagglutination assay. An ECG case–control study was performed in subjects seropositive for T. cruzi and the results were matched by sex and age to seronegative residents of the same localities. A univariate analysis with χ2 and Fisher’s exact tests was used to determine the association between seropositivity and age (years), sex, and ECG changes. A multivariate analysis was then performed to calculate the odd ratios between T. cruzi seropositivity and the risk factors. Results The seropositive rate was 1.93% (52/2,688). In the ECG study, 22.85% (8/35) of the infected individuals exhibited ECG abnormalities. Triatoma gerstaeckeri was the only vector reported. The main risk factors were ceiling construction material (P ≤ 0.0024), domestic animals (P ≤ 0.0001), and living in rural municipalities (P ≤ 0.0025). Conclusions These findings demonstrate a 10-fold higher prevalence of Chagas disease than previously reported (0.2%), which implies a serious public health threat in northeastern Mexico. The epidemiological profile established in this study differs from that found in the rest of Mexico, where human populations live in close proximity to domiciliary triatomines. PMID:24580840

Serum Lipid Profile, Prevalence of Dyslipidaemia, and Associated Risk Factors Among Northern Mexican Adolescents

PubMed Central

Bibiloni, Maria del Mar; Salas, Rogelio; De la Garza, Yolanda E.; Villarreal, Jesus Z.; Sureda, Antoni; Tur, Josep A.

2016-01-01

ABSTRACT Background: The increase in overweight and obese children and adolescents may be linked to increased rates of dyslipidaemia. The aim was to assess the serum lipid profile, the prevalence of dyslipidaemia, and associated risk factors among the North Mexican adolescent population. Methods: Two hundred and ninety-three subjects (47.8% girls) ages 11 to 16 years took part in the Nuevo León State Survey of Nutrition and Health 2011–2012. According to the 2011 Expert Panel on Integrated Guidelines for Cardiovascular Health and Risk Reduction in Children and Adolescents, dyslipidaemia was defined as a presence of ≥1 of the following levels (mg/dL): Total cholesterol ≥200, low-density lipoprotein cholesterol ≥130, non–high-density lipoprotein cholesterol <40, and triglyceride ≥130. Results: The overall frequency of dyslipidaemia was 48.8% with no differences between sexes. Adolescents with high body mass index were more likely to have at least 1 abnormal lipid level (overweight: odds ratio [OR]: 2.07; 95% confidence interval [CI]: 1.14–3.77, P < 0.05; obesity: OR: 2.21, 95% CI: 1.11–4.41, P < 0.05) than those with normal weight. Abdominally subjects with obesity were also more likely to have at least 1 abnormal lipid level (OR: 2.30; 95% CI: 1.35–3.91, P < 0.01) than their leaner counterparts. Conclusions: Half of Mexican adolescents living in the State of Nuevo León have at least 1 abnormal lipid concentration. Low HDL-chol level was the most common dyslipidaemia. Body mass index and abdominal obesity were associated with the prevalence of at least 1 abnormal lipid level. PMID:27379432

Resonancias en la región trans-neptuniana

NASA Astrophysics Data System (ADS)

Gallardo, T.; Ferraz-Mello, S.

La expansión de la órbita del planeta Neptuno en la etapa de acreción del Sistema Solar exterior (Fernández e Ip 1984, 1996) parece ser un mecanismo eficiente para la captura de planetesimales en las resonancias exteriores con Neptuno (Malhotra 1995). Por otro lado, los estudios dinámicos realizados por varios autores indican que las resonancias son regiones de evolución estable, en contraste con el comportamiento caótico del resto de la región trans-neptuniana. Por estas razones, y si bien los datos observacionales son todavía muy limitados, se supone que los objetos descubiertos se encuentran en alguna de esas resonancias. En esta comunicación presentamos un estudio analítico y numérico de las principales resonancias exteriores con Neptuno.

Infusion pumps and red blood cell damage in transfusion therapy: an integrative revision of the academic literature.

PubMed

Wilson, Ana Maria Miranda Martins; Peterlini, Maria Angélica Sorgini; Pedreira, Mavilde da Luz Gonçalves

2016-08-15

2014. Foram identificados 17 artigos de acordo com os critérios de inclusão e exclusão. Todas as publicações incluídas eram estudos experimentais in vitro e abordavam o uso de bombas de infusão na terapêutica transfusional. A síntese dos dados foi apresentada em quadro sinóptico e a análise gerou duas categorias relevantes: lesão celular e mecanismo de infusão. bombas de infusão podem ser deletérias às hemácias de acordo o mecanismo de infusão, sendo que as peristálticas lineares foram mais predisponentes à hemólise. A lesão celular foi relacionada à liberação plasmática de marcadores, predominando a hemoglobina livre e potássio. Reitera-se a necessidade de pesquisas adicionais e investimentos tecnológicos para nortear o desenvolvimento de protocolos que promovam prática segura e que subsidiem futuros estudos clínicos. identificar en la literatura la producción científica acerca de los efectos de la bomba de transfusión en la administración de glóbulos rojos y evaluar las implicaciones del uso de esos equipos en la práctica transfusional de enfermería. revisión integradora de literatura en las bases de datos Pubmed/Medline, Scopus, Biblioteca Virtual en Salud, SciELO, Web of Science y Cochrane, utilizando los descriptores "bombas de infusión", "transfusión de sangre", "transfusión de eritrocitos" y "hemolisis". La fecha inicial no fue delimitada y la final fue en diciembre de 2014. Fueron identificados 17 artículos de acuerdo con los criterios de inclusión y exclusión. todas las publicaciones incluidas eran estudios experimentales in vitro y abordaban el uso de bombas de infusión en la terapéutica transfusional. La síntesis de los datos se presenta en un cuadro sinóptico y el análisis generó dos categorías relevantes: lesión celular y mecanismo de transfusión. las bombas de infusión pueden ser perjudiciales para los glóbulos rojos de acuerdo el mecanismo de transfusión, siendo que las peristálticas lineares

New Photocatalysts for Hydrogen Production; Nuevos Fotocatalizadores para la Producción de Hidrógeno

DOE PAGES

García, Abraham; Cotto, María; Duconge, José; ...

2014-06-10

The use of hydrogen as replacement for fossil fuels, on which we depend today, is a matter of great relevance. The sustainable generation of hydrogen as fuel is relevant from an environmental and economic point of view. In this study we have explored new synthetic routes for developing new photocatalysts to be used in water splitting, for hydrogen production. Different techniques have been used to produce hydrogen, such as electrolysis, even though these processes have been found to be energetically non suitable. In this research various photocatalytic materials were presented as possible alternatives for using in water splitting processes. Characterizationmore » of the new synthesized materials has been done by using different experimental techniques including Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), surface area BET, and X-ray Diffraction (XRD). The efficiency of the synthesized photocatalysts was determined by evaluating the hydrogen evolution by the photocatalytic water splitting reaction.« less

Sistemas Eolicos Pequenos para Generacion de Electricidad: Una guia para consumidores en Nuevo Mexico (in Spanish)

DOE Office of Scientific and Technical Information (OSTI.GOV)

Not Available

2007-09-01

This Spanish version of the popular Small Wind Electric Systems: A New Mexico Consumer's Guide provides consumers with information to help them determine whether a small wind electric system can provide all or a portion of the energy they need for their home or business based on their wind resource, energy needs, and economics. Topics include how to make a home more energy efficient, how to choose the correct turbine size, the parts of a wind electric system, how to determine whether enough wind resource exists, how to choose the best site for a turbine, how to connect a systemmore » to the utility grid, and whether it's possible to become independent of the utility grid using wind energy. In addition, the cover of the guide contains a list of contacts for more information.« less

An assessment of stream water quality of the Rio San Juan, Nuevo Leon, Mexico, 1995-1996.

PubMed

Flores Laureano, José Santos; Návar, José

2002-01-01

Good water quality of the Rio San Juan is critical for economic development of northeastern Mexico. However, water quality of the river has rapidly degraded during the last few decades. Societal concerns include indications of contamination problems and increased water diversions for agriculture, residential, and industrial water supplies. Eight sampling sites were selected along the river where water samples were collected monthly for 10 mo (October 1995-July 1996). The concentration of heavy metals and chemical constituents and measurements of bacteriological and physical parameters were determined on water samples. In addition, river discharge was recorded. Constituent concentrations in 18.7% of all samples exceeded at least one water quality standard. In particular, concentrations of fecal and total coliform bacteria, sulfate, detergent, dissolved solids, Al, Ba, Cr, Fe, and Cd, exceeded several water quality standards. Pollution showed spatial and temporal variations and trends. These variations were statistically explained by spatial and temporal changes of constituent inputs and discharge. Samples collected from the site upstream of El Cuchillo reservoir had large constituent concentrations when discharge was small; this reservoir supplies domestic and industrial water to the city of Monterrey.

Approval of Alternative Test Method for Puerto Nuevo Wastewater Treatment Plant, San Juan, Puerto Rico Memorandum

EPA Pesticide Factsheets

This December 2008 memorandum is from Conniesue Oldham of the Measurement Technology Group to Marcus E. Kantz in EPA Region 2. This memorandum is regarding a request to use an alternative test method at the Puerto Neuvo wastewater treatment plant

Negative pressure therapy for the treatment of complex wounds.

PubMed

Lima, Renan Victor Kümpel Schmidt; Coltro, Pedro Soler; Farina, Jayme Adriano

2017-01-01

The objective of this study is to evaluate the effectiveness of negative pressure therapy (NPT) in the treatment of complex wounds, with emphasis on its mechanisms of action and main therapeutic indications. We searched the Pubmed / Medline database for articles published from 1997 to 2016, and selected the most relevant ones. The mechanisms of action of NPT involveboth physical effects, such as increased perfusion, control of edema and exudate, reduction of wound dimensions and bacterial clearance, and biological ones, such as the stimulation of granulation tissue formation, microdeformations and reduction of Inflammatory response. The main indications of NPT are complex wounds, such as pressure ulcers, traumatic wounds, operative wound dehiscences, burns, necrotizing wounds, venous ulcers, diabetic wounds, skin grafts, open abdomen, prevention of complications in closed incisions and in the association with instillation of solutions in infected wounds. RESUMO O objetivo desse estudo é avaliar a eficácia da terapia por pressão negativa (TPN) no tratamento de feridas complexas, com ênfase em seus mecanismos de ação e principais indicações terapêuticas. Foi realizada revisão na base de dados Pubmed / Medline, em artigos publicados de 1997 a 2016, e selecionados os mais relevantes. O mecanismo de ação da TPN envolve efeitos físicos, como o aumento da perfusão, controle do edema e do exsudato, redução das dimensões da ferida e depuração bacteriana, e biológicos, como o estímulo à formação de tecido de granulação, microdeformações e redução da resposta inflamatória local. As principais indicações da TPN são as feridas complexas como úlceras por pressão, feridas traumáticas, deiscências de ferida operatória, queimaduras, feridas necrotizantes, úlceras venosas, feridas diabéticas, os enxertos de pele, o abdome aberto, na prevenção de complicações em incisões fechadas e na associação com instilação de soluções em feridas

[Training and use of dental manpower resources in Mexico].

PubMed

Hermosillo, G G; López Cámara, V; Alvarez Manilla, J M; García Cantú, M; Silva Olivares, H

1978-01-01

The introductory section describes the general situation of dental care in Mexico, analyzes the prevailing service model (including the kind of work done by the dental professional and the technology he employs), and briefly reviews the evolution of dentistry in the country. There follows an account of a series of new approaches to service and manpower training in experimental implementation since 1972 in the stomatology curriculum at the Xochimilco campus of the Metropolitan Autonomous University, at the National School of Professional Studies at Zaragoza, in the School of Dentistry of Nuevo León Autonomous University, Monterrey, and in the Dental Services at Ciudad Netzahualcóyotl. In each case, the background, characteristics, and objectives of the programs, and their evolution and prospects are described.

Nuevos escenarios de la migración México-Estados Unidos. Las consecuencias de la guerra antiinmigrante

PubMed Central

MASSEY, Douglas S.; PREN, Karen A.; DURAND, Jorge

2010-01-01

La historia de la migración México-Estados Unidos se caracteriza por una serie de periodos durante los cuales los patrones migratorios se transforman y evolucionan como respuesta a los cambios en la política migratoria de Estados Unidos. En la década de 1990 se dio uno de estos cambios, lo que provocó el paso de la ‘era de la contradicción’ a la ‘era de la marginalización’. Actualmente, un gran número de migrantes indocumentados permanecen al margen de la ley, precisamente en un periodo en el que las penas se han incrementado y la persecución ha alcanzado niveles récord. De manera cada vez más notoria, los migrantes indocumentados, por la represión interna y fronteriza, quedan obligados a romper los lazos que los vinculaban con sus lugares de destino, pero al mismo tiempo se sienten cada vez más extraños en una tierra donde la aplicación de políticas antiinmigrantes es cosa de todos los días, lo que los sitúa en una posición de marginalización y gran vulnerabilidad. PMID:21209790

Absence of antibodies against Bordetella pertussis in pregnant women and newborns in the state of Nuevo Leon.

PubMed

Villarreal-Pérez, Jesús Zacarías; Ramírez-Aranda, José Manuel; Rodríguez-Rodríguez, Irasema; Perales-Dávila, José; García-Elizondo, Francisco Javier; Gómez-Gómez, Celina; Galindo-Galindo, Edgar; Rodríguez-Moreno, Marco Antonio; Ballesteros-Elizondo, Romelia

2014-09-01

To assess placental transfer of antibodies to the child at birth and at 2 months of age. For the quantification of anti-PT IgG antibodies, we used an indirect enzyme-linked immunosorbent assay standardized by The National Institute of Epidemiologic Diagnosis and Reference (InDRE). Samples were considered negative from 0 to 48 IU/mL, indeterminate from 49 to 93 IU/mL and positive at ≥94 IU/mL. We performed a cross-sectional assessment of anti-PT IgG antibody levels in the mother, umbilical cord, and child. There was a higher concentration of IgG anti-TP in the umbilical cord (4.3%) and in the mother (1.4%), but a total absence was observed in the child (0%). The vulnerability of children to Bordetella pertussis shows the need to implement effective immunization strategies, whether actively, in the child, or passively through the mother, adolescents, and adults who are in contact with the child.

Un Nuevo Dia: As Latino Population Grows, so Must College Attainment. Lumina Foundation Focus[TM]. Spring 2011

ERIC Educational Resources Information Center

Brennan, Patricia L.

2011-01-01

Recently released figures from U.S. Census Bureau make one point with stunning clarity: The face of America is changing. And rapidly. Consider the numbers: The U.S. population grew by about 9 percent between 2000 and 2010, rising from 281 million to nearly 309 million. During that decade, the number of Latino residents increased by 43…

Entre el Renacimiento y el Nuevo Mundo: Vida y obras de Hernan Perez de Oliva (1494?-1531)

ERIC Educational Resources Information Center

Pellus Perez, Elena

2012-01-01

Hernan Perez de Oliva (1494?-1531) was a learned Spanish humanist who wrote his major works in the decades following the discovery of America. By articulating events of his career and literary life, my goal is to comprehend his contributions to the early literary production regarding the newly-found Americas. The thesis consists of three parts.…

A importância de reconhecer a síndrome antifosfolípide na medicina vascular

PubMed Central

Funke, Andreas; Danowski, Adriana; de Andrade, Danieli Castro Oliveira; Rêgo, Jozelia; Levy, Roger Abramino

2017-01-01

Resumo A síndrome antifosfolipíde (SAF) é uma doença autoimune sistêmica caracterizada por trombose arterial ou venosa recorrente e/ou morbidade gestacional e pela presença dos anticorpos antifosfolipídeos, podendo apresentar outras manifestações vasculares, como microangiopatia, arteriopatia crônica e SAF catastrófica. Determinados testes laboratoriais para a síndrome (por exemplo, o anticoagulante lúpico) podem sofrer interferência do uso de medicações anticoagulantes, dificultando o diagnóstico. A fisiopatologia da SAF é complexa, sendo enumerados no texto diversos mecanismos patogênicos relacionados à coagulação, ao endotélio e às plaquetas. Por fim, discutimos o tratamento da SAF de acordo com a presença e o tipo de manifestações clínicas, o uso dos anticoagulantes orais diretos e o manejo perioperatório de pacientes com SAF. PMID:29930638

An analysis of unused and expired medications in Mexican households.

PubMed

Gracia-Vásquez, Sandra Leticia; Ramírez-Lara, Evangelina; Camacho-Mora, Ivonne Antonieta; Cantú-Cárdenas, Lucía G; Gracia-Vásquez, Yolanda Araceli; Esquivel-Ferriño, Patricia C; Ramírez-Cabrera, Mónica Azucena; Gonzalez-Barranco, Patricia

2015-02-01

Unsafe storage of unused medications at home leads to an increased risk of toxicity, accidental childhood poisoning or risk for suicide, whereas an improper disposal of unwanted/expired medications from household raises concern about environmental pollution. The aim of the study was to characterize expired medications collected according to the types of therapeutic groups, pharmaceutical dosage forms, expiration dates and were prescribed or over the counter drugs, and whether they came from Mexican health system or purchased by patients themselves. The study was conducted in the metropolitan area of Monterrey during a 12-month period from March 2012 to February 2013. Unused/expired drugs were collected according to the collection and disposal of expired medication program instituted by the Department of Health of the State of Nuevo León. Pharmacists and students from The Autonomous University of Nuevo León recorded types of therapeutic groups, total of medicines in each group, among other classification criteria. The proportion of every collected therapeutic group, type of dosage forms, and expiration date. The amount of medications classified was 22,140 items corresponding to a 30 % of the total collected medications in that period of time; most of them belonged to the non-steroidal anti-inflammatory drugs (16.11 %). According to the pharmaceutical dosage forms, results showed that a high percentage were solid dosage forms (73.39 %), of the total unused/expired medications, most of them were prescription drugs (91 %) which were purchased at private pharmacies. Expiration date of medications ranges from 1995 to 2016, being 2011 the outstanding year (36.66 %). Addressing the aspect of unused drug disposition constitutes a challenge for Mexican government, due to health implications related to inadequate disposition. No matter how efficient the programs of collection and disposal of expired drugs are, none of them can collect all unused or expired drugs, that is

Fotometría de grupos compactos de galaxias: Shakhbazian 37, 45, 166, 331 y 362

NASA Astrophysics Data System (ADS)

Campos, J. M.; Calderón, J. H.; Gimeno, N. G.; Díaz, R. J.

Continuando con la fotometría CCD de Grupos de Galaxias Compactos de Shakhbazyan (SCGG) en este trabajo se presentan nuevos resultados preliminares sobre los grupos Shakbazyan 37, 45, 166, 331 y 362. EL objeto del proyecto es contribuir al estudio de las propiedades físicas de tales grupos y contribuir a las bases de datos para mejora de las estadísticas. Los datos fueron adquiridos con el Telescopio JKT del Observatorio Norte Europeo. El análisis de las imágenes en las bandas I y B como del índice de color B-I permitió reidentificar las galaxias catalogadas, resultando las mismas muy enrojecidas y verificando que predominan las galaxias tempranas, resultados consistentes con los obtenidos para otros grupos y por otros autores.

Waste characterization study for the Kemp's Ridley sea turtle. Technical memo

DOE Office of Scientific and Technical Information (OSTI.GOV)

Malone, R.F.; Guarisco, M.

1988-02-01

The Kemp's Ridley sea turtle, Lepidochelys kempi, is an endangered species. The National Marine Fisheries Service's Head Start program is part of an international operation to save the turtles from extinction. Under the Head Start program, eggs from the Ridley's only known wild nesting beach at Rancho Nuevo in Mexico are transported to Padre Island on the Texas coast to be hatched. The head start enables the turtles to develop a survival advantage. The principal objective was to develop baseline waste-characterization data required to design a waste-water treatment scheme for the Galveston Head Start facility. As a secondary objective, preliminarymore » testing of some filtration components was undertaken to determine which units were most appropriate for inclusion in a wastewater treatment scheme.« less

Pressure changes and their effects on the Cerro Prieto geothermal field

DOE Office of Scientific and Technical Information (OSTI.GOV)

Bermejo M, F.J.; Navarro O, F.X.; Esquer P, C.A.

1981-01-01

Continuous extraction of the water-steam mixture at the field has been increasing to fulfill the steam requirements of the power plant. As a result, pressure declines have been observed in the producing strata in all of the wells, as well as in the geothermal reservoir as a whole. Anomalous behavior that has been observed in the wells' hydraulic columns in most cases is due to the interconnection of the various strata penetrated by the well. When this occurs, unbalanced hydraulic pressures cause the movement of fluids between the strata. As an example of this hydraulic imbalance causing the flow ofmore » fluids from an upper to a lower zone, well Nuevo Leon 1 where this effect occurs between regions 600 m apart was chosen.« less

Nivel de Actividad Física, Autoeficacia, Beneficios y Barreras Percibidas en Mujeres Mayores Mexicanas Independientes (Physical Activity Level, Exercise Self-Efficacy, Benefits and Perceived Barriers of Independent Mexican Older Women).

PubMed

Enríquez-Reyna, María Cristina; Cruz-Castruita, Rosa María; Zamarripa, Jorge; Ceballos-Gurrola, Oswaldo; Guevara-Valtier, Milton Carlos

2016-03-01

This descriptive comparative study examined differences in personal characteristics, exercise self-efficacy, benefits and barriers of independent elderly women to perform physical activity (PA) according with the PA level. Two hundred three women older than 60 years of age, from a community located in Nuevo Leon, Mexico participated in the study. Data was collected using: a) A personal data questionnaire, b) Exercise Self-Efficacy Scale, c) Exercise Benefits/ Barriers Scale and d) Physical Activity Scale for the Elderly were completed. Age was similar in participants with low and acceptable PA level. Participants with lower levels of PA reported consuming more medications, fewer years of education and lower values of exercise self-efficacy, benefits and barriers. In this sample, exercise self-efficacy and benefits were positively associated with the PA level. © 2016. All rights reserved.

Correlation between river slope and meandering variability (obtained by DGPS data) and morphotectonics for two Andean tributaries of the Amazon river: the case of Beni (Bolivia) and Napo (Ecuador-Peru) rivers.

NASA Astrophysics Data System (ADS)

Bourrel, L.; Darrozes, J.; Guyot, J.; Christophoul, F.; Bondoux, F.

2007-05-01

The Beni river drains a catchment area of 282 000 km2 of which 40 percent are located in the Cordillera of the Bolivian and Peruvian Andes, and the rest in the Amazonian plain : the studied reaches runs from Guanay (Andean Piedmont) to Riberalta (junction with Madre de Dios river) that represents a distance by the river of 1055 km. The Napo river starts in the Ecuadorian Andes and leaves Ecuador in Nuevo Rocafuerte (27 400 km2) and enters in Peru until its junction with the Amazon river : the studied section runs from Misahualli (Andean Piedmont) to this junction, that represents a distance by the river of 995 km. The GPS data were acquired using a mobile GPS embarked on a boat and 4 fixed bases located along the Beni river, 6 along the Napo river and the two rivers profile calculated from post-treated differential GPS solutions. For the Beni river, two sectors were identified: - the upstream sector (~230 km) between Guanay (414 m) and 50 km downstream Rurrenabaque (245 m) is located in Andean Piedmont, which consists in a series of thrusts associated with anticlines and synclines (the subandean zone), and presents slope values range between 135 cm/km and 10 cm/km and an average index of sinuosity (IS) of 1.29, - the downstream sector (~ 820 km) which runs in Amazonian plain (until Riberalta -165 m-), is characterized by an average slope of 8 cm/km and an average IS of 2.06 (this sector is much more homogeneous and the Beni river shows a meandering channel). For the Napo River, three sectors were identified: - the first sector (~140 km) between Misahualli (401 m) and Coca (265 m), is located in Andean Piedmont (subandean zone) and presents slope values range between 170 cm/km and 30 cm/km and an average IS of 1.6, - the second sector (~250 km) between Coca (when the Napo river enters in the Amazonian plain) and Nuevo Rocafuerte (190 m), presents slope values range between 30 cm/km and 20 cm/km and an average IS of 1.2, and a convex-up shape profile corresponding to

SERUM LEPTIN LEVENS AND HEPATOCELLULAR CARCINOMA: REVIEW ARTICLE.

PubMed

Andrighetto, Luiza Vitelo; Poziomyck, Aline Kirjner

2016-01-01

Hepatocellular carcinoma is one of the most frequent types of malignant tumors in the world. There is growing evidence of the relationship between it development and obesity. The mechanism that links obesity to cancer is still not fully understood; however, it is essential to the understanding the adipose tissue in metabolic changes related to obesity and hepatocellular carcinoma. To review the influence of serum leptin levels in patients with hepatocelular carcinoma. Systematic review of the literature based on the methodology of the Cochrane Institute. The search for articles was in the database: Science Direct, Scielo, Medline, Lilacs e Pubmed. The key words used were hepatocellular carcinoma, leptin, adipokine. After evaluation of individual studies, were selected seven studies. The results previously studied are still inconsistent and contradictory, and leptin can be effectively involved in the occurrence and development of hepatocellular carcinoma. Therefore, it is necessary to develop prospective, well-designed and conducted focusing on the role and specific mechanisms of this hormone in patients with hepatocellular carcinoma, so that new correlations can be properly supported. O carcinoma hepatocelular é um dos tipos mais frequentes de tumores malignos no mundo. Há crescentes evidências da relação entre o seu desenvolvimento e a obesidade. O mecanismo que os relaciona ainda não é completamente entendido. Entretanto é essencial a compreensão do tecido adiposo nas alterações metabólicas relacionadas à obesidade e ao câncer. Revisar a influência dos níveis séricos de leptina em pacientes com carcinoma hepatocelular. Trata-se de revisão bibliográfica baseada na metodologia do Instituto Cochrane; a busca de dados foi realizada na base de dados Science Direct, Scielo, Medline, Lilacs e Pubmed, empregando as seguintes descritores: hepatocellular carcinoma, leptin, adipokine. Após avaliação individual dos artigos selecionaram-se sete estudos

Evolución Dinámica de Cúmulos Estelares Abiertos

NASA Astrophysics Data System (ADS)

de La Fuente Marcos, R.

Las estrellas que observamos no se formaron aisladamente, sino que lo hicieron en grupos o cúmulos. Estos sistemas estelares recibenel nombre de cúmulos estelares abiertos o galácticos cuando están constituidos por estrellas de la Población I. Los cúmulos abiertos se localizan preferentemente en el plano galáctico, y en muchos de ellos está teniendo lugar aún una activa formación estelar. El propósito principal de esta tesis doctoral es el estudio de la evolución dinámica de estos sistemas estelares por medio de simulaciones numéricas y de la comparación de sus resultados con datos observacionales. Con este fin se analizan los efectos que, sobre la dinámica de los cúmulos, ejercen varios fenómenos de interés astrofísico tales como el campo gravitatorio galáctico, la pérdida de masa causada por la evolución estelar y la presencia de binarias primordiales. En este trabajo se presentan los resultados de más de un centenar de modelos de cúmulos, con poblaciones comprendidas en el intervalo [100, 10.000] estrellas, calculados con NBODY5, un programa estándar en el campo de la Dinámica Estelar Experimental. De los mismos se deduce que el mecanismo principal que rige la dinámica de los cúmulos abiertos es la evolución estelar de su distribución de masas, encontrándose un comportamiento diferencial fuertemente dependiente de la población inicial del cúmulo. Los mecanismos responsables de la desintegración de los cúmulos abiertos son analizados en detalle, proponiéndose un modelo analítico que ajusta razonablemente los resultados de las simulaciones. Además, y con el fin de explicar el elevado número de sistemas múltiples observados en cúmulos abiertos, se estudian los efectos que, sobre los mismos, ejerce la presencia de una cierta fracción de binarias primordiales. El papel de las binarias tambiín depende de la riqueza del cúmulo y sus efectos se interrelacionan con aquellos debidos a la evolución estelar. Por último, se

Mass Ejection from Old and Young Stars and the Sun

NASA Astrophysics Data System (ADS)

Jatenco-Pereira, V.; Opher, R.

1990-11-01

RESUMEN. Para poder explicar: 1) la enorme cantidad de perdida de masa y la baja velocidad asint5tica de las estrellas gigantes de o, y 2) los flujos de masa observados en protoestrellas, se sugiere un modelo para Ia perdida de masa, en donde se usa un flujo de ondas de Alfvencomo un mecanismo de aceleraci6n para los vientos de estrellas de tipo y vientos en protoestrellas. Se estudian los mecanismos de disipaci5n de las ondas de Alfven: los amortiguamientos no lineal, de superficie reso- nante y turbulento. En nuestro modelo se usa una divergente A(r) = A(R0) (r/r0)5 (donde A(r) es el area a una distancia radial r, y (A(r)/r2)max/(A(ro)/r02 - 10). Tambien se sugiere un modelo para una de hoyo coronal en el Sol. Se muestra que para satisfacer los datos observacionales en el Sol, tomando en cuenta la deposici6n del momento de las ondas de Alfven sobre el viento, se necesita: (a) una divergencia lenta en un hoyo coronal hasta una altura de 0.01 - 0.1 R seguido de (b) una divergencia rap ida de hasta una altura aproximada de 1 R . ABSTRACT: In order to explain (1) a large mass-loss rate and a small asymptotic flow speed of late-type giant stars and (2) the observed protostellar mass outflows, we suggest a model for mass loss, where we use a flux of Alfven waves as a mechanism of acceleration for late-type giant star winds and protostellar winds. We study the Alfven wave dissipation mechanisms: nonlinear damping, resonant surface damping, and turbulent damping. In our model we use a diverging geometry A(r) = A(r0) (r I r )S (where A(r) is the cross sectional area of the geometry at a radial distance r, and(A(r) I r2)max/(A(r0)/r02) = 10). We also suggest a model for a coronal hole geometry in the sun. We show that in order to satisfy the observational data of the sun, taking into account Alfven wave momentum deposition in the wind, we need: (a) a slow divergence in a coronal hole up t6 a height of 0.01 - 0.1 followed by (b) a rapid divergence up to a height of

Lipid production by pure and mixed cultures of Chlorella pyrenoidosa and Rhodotorula mucilaginosa isolated in Nuevo Leon, Mexico.

PubMed

Reyna-Martínez, Raúl; Gomez-Flores, Ricardo; López-Chuken, Ulrico J; González-González, Rosario; Fernández-Delgadillo, Sergio; Balderas-Rentería, Isaias

2015-01-01

Given the well-known environmental drawbacks of using fossil fuels, advances in the field of alternative energy have become a worldwide technological priority. Special interest has been focused on the production of biodiesel obtained from oleaginous microorganisms. In the present research, lipid production by two species, microalgae Chlorella pyrenoidosa and yeast Rhodotorula mucilaginosa was assessed, independently and in mixed culture to evaluate a possible synergy. Fatty acid analysis was performed by gas chromatography. Among pure and mixed cultures of both strains and several culturing conditions, the highest biomass and lipid productivity was obtained by C. pyrenoidosa (8.05 and 1.62 g/L, respectively). The results of this study showed that both strains used are in fact oleaginous strains as they were found to reach up to 20 % of lipids, in addition, lipids in both pure and mixed cultures were mainly of triglycerides (>90 %), composed of fatty acid chains between 16 and 18 carbons.

Optics outreach activities with elementary school kids from public education in Mexico

NASA Astrophysics Data System (ADS)

Viera-González, P.; Sánchez-Guerrero, G.; Ruiz-Mendoza, J.; Cárdenas-Ortiz, G.; Ceballos-Herrera, D.; Selvas-Aguilar, R.

2014-09-01

This work shows the results obtained from the "O4K" Project supported by International Society for Optics and Photonis (SPIE) and the Universidad Autonoma de Nuevo Leon (UANL) through its SPIE Student Chapter and the Dr. Juan Carlos Ruiz-Mendoza, outreach coordinator of the Facultad de Ciencias Fisico Matematicas of the UANL. Undergraduate and graduate students designed Optics representative activities using easy-access materials that allow the interaction of children with optics over the exploration, observation and experimentation, taking as premise that the best way to learn Science is the interaction with it. Several activities were realized through the 2011-2013 events with 1,600 kids with ages from 10 to 12; the results were analyzed using surveys. One of the principal conclusions is that in most of the cases the children changed their opinions about Sciences in a positive way.

El Planetario Móvil de la Municipalidad de la ciudad de Córdoba

NASA Astrophysics Data System (ADS)

Suárez, F. E.; Campos, M.; Goldes, G. V.; Carranza, G. J.; Romero, R.; Juri, H. O.

Se describen las características y operatoria del nuevo Planetario Móvil. Se trata de un equipamiento de propiedad de la Municipalidad de la Ciudad de Córdoba que es operado por personal y en el predio de la Universidad, en virtud de un convenio suscripto entre ambas instituciones. El planetario consta de una cúpula inflable y de un proyector con programas alternativos que incluyen temas de astronomía, geografía, biología y medio ambiente, entre otros. En la actualidad opera en las instalaciones del Pabellón Argentina de la Ciudad Universitaria y recibe delegaciones escolares de todo el territorio provincial. El Planetario Móvil es parte de un proyecto más amplio de divulgación científica en el cual interactúan la Universidad y el Municipio.

Una propuesta para el desarrollo de un arreglo de síntesis de apertura

NASA Astrophysics Data System (ADS)

Arnal, E. M.

Los estudios llevados a cabo en la transición del hidrógeno neutro a λ~21-cm han contribuído a incrementar nuestro conocimiento acerca de las propiedades globales del medio interestelar, sea este galáctico o extragaláctico. Avances en este campo han sido provocados, a menudo, por la puesta en servicio de radiotelescopios que poseen una mayor resolución angular. Aquí se presenta una propuesta para desarrollar un nuevo instrumento, un interferómetro, que permitirá abrir nuevas líneas de investigación. Este instrumento combinará la técnica de síntesis de apertura con la de espectroscopía de correlación digital, para alcanzar una resolución angular de 1' y un campo de visión de ~1o.7.

Adaptation and Implementation of a Science-Based Prevention System in Colombia: Challenges and Achievements

PubMed Central

Pérez-Gómez, Augusto; Mejía-Trujillo, Juliana; Brown, Eric C.; Eisenberg, Nicole

2016-01-01

During the last 2 years, the Colombian government and the Nuevos Rumbos Corporation have been implementing an adapted version of the Communities That Care (CTC) prevention system, called Comunidades Que se Cuidan (CQC) in Spanish, for use in Colombia. This brief report presents the process of implementing CQC and identifies some of the main challenges and achievements of implementing the system in eight communities in Colombia. Preliminary results of a pilot study of CQC implementation in Colombia show that prevention system development, including a focus on measuring community risk and protection, can be established successfully in Latin American communities despite a lack of rigorously tested prevention programs and strategies. Moreover, mobilizing community coalitions toward science-based prevention, with a focus on examining local risk and protective factor data, can spur development and evaluation of prevention efforts in Latin America. PMID:28154437

[Epidemiologic aspects of bronchial asthma in the Mexican Republic].

PubMed

Martínez-Cairo Cueto, S; Salas-Ramírez, M; Segura-Méndez, N H

1995-01-01

This work was done to determine the mortality and morbidity rates secondary to asthma in Mexico, for age, gender, state of the country and time. Data were obtained from the Instituto Nacional de Estadística. Geografía e Informática. We calculated morbidity and mortality rates adjusting for age, by a direct method. In the results, there was a reduction in mortality rate in both genders, from 1960 to 1987. Age groups up to 4 years and older than 50 were the mainly affected. From 1960 to the present time, the state with highest mortality is Tlaxcala. The states with highest hospitalization rates were Morelos, Baja California Sur, Nuevo León, Durango and Tamaulipas. In conclusion, mortality rates secondary to asthma in Mexico show a decreasing trend, with a considerable rise in morbidity, especially in the adolescent group.

[Not Available].

PubMed

Arellano Ortiz, Ana Lidia; Jiménez Vega, Florinda; Díaz Hernández, Cecilia; Salcedo Vargas, Muricio; De la Mora Covarrubias, Antonio; López Díaz, José Alberto; Vargas Requena, Claudia Lucía; Cassís Nosthas, María Lorena

2016-07-19

Introducción: las lesiones intraepiteliales escamosas (LIE) son un estado de transición hacia el cáncer cervicouterino (CaCu) y un déficit de micronutrientes puede acelerar este proceso. Por ello, determinar la existencia de este déficit y conocer qué factores se asocian permitiría una posible prevención en esta población de riesgo.Objetivo: determinar la presencia de alguna deficiencia de micronutrientes involucrados en el proceso anticancerígeno y asociar este déficit con hábitos y factores demográficos en pacientes con LIE de Ciudad Juárez, Chihuahua, México.Métodos:en un estudio transversal analítico fueron seleccionadas 102 pacientes con LIE. Se realizó una encuesta dietaría (recordatorio de 24 horas) para estimar la ingesta de micronutrientes. La deficiencia fue determinada con un consumo < 75% de la ingesta diaria recomendada o sugerida (IDR o IDS) en México. Algunos hábitos y factores demográficos fueron obtenidos mediante la entrevista con la paciente. Se realizó un modelo de regresión logística para asociar la presencia de deficiencia con factores que afectan a la ingesta o incrementan el requerimiento de micronutrientes.Resultados:el retinol, ácido fólico, zinc, vitaminas C y E, considerados como micronutrientes en el proceso anticancerígeno del CaCu, se encontraron por debajo del 75% de la IDR. Aquellas mujeres con sobrepeso, obesidad y amas de casa se asociaron significativamente con la deficiencia de micronutrientes.Conclusión: el sobrepeso, la obesidad y la ocupación han sido asociados para presentar deficiencias de micronutrientes en este estudio. Estas variables convergen en una posible inseguridad alimentaria, la cual podría asociarse al incremento de incidencia de CaCu en México.

Método numérico das diferenças finitas no domínio do tempo aplicado a ondas Alfvén em plasma astrofísico

NASA Astrophysics Data System (ADS)

Dos Santos, L. C.; Kintopp, J. A.; Jatenco-Pereira, V.; Opher, R.

2003-08-01

Ondas Alfvén em plasma astrofísico têm sido objeto de intenso estudo nas últimas décadas pelo fato de apresentarem papel importante em muitas áreas de pesquisa na astrofísica. Particularmente são importantes no mecanismo de aquecimento da coroa solar; em ventos estelares; em jatos galácticos e extragalácticos; em discos protoestelares, etc. A formulação para diferenças finitas no domínio do tempo (FDTD), aplicada a plasma magnetizado é desenvolvida para estudo das propriedades de ondas Alfvén em três dimensões (3D-FDTD). O método é aplicado inicialmente a um plasma homogêneo e isotérmico imerso em uma região com campo magnético externo B0, que sofre uma pequena perturbação. Uma vez gerada a onda, esta perturbação é retirada e, então analisamos a evolução temporal das ondas, bem como a forma de seu amortecimento.

Dinámica de planetas extrasolares resonantes

NASA Astrophysics Data System (ADS)

Beauge, C.

Actualmente se han detectado 117 planetas alrededor de estrellas de Secuencia Principal, incluyendo 12 sistemas planetarios, cada uno con dos o tres miembros. De estos últimos, ocho poseen planetas en órbitas próximas y sus perturbaciones gravitacionales se convierten en un factor fundamental para la estabilidad orbital del sistema. Todos se encuentran en configuraciones resonantes, desde la conmensurabilidad de movimientos 2/1 de Gliese 876, hasta la resonancia secular de Ups And. En esta presentación analizamos varios aspectos de la dinámica resonante de los planetas extrasolares, incluyendo la existencia de soluciones de equilibrio, construcción de modelos analógicos y métodos para la determinación de masas individuales. También discutimos por qué las resonancias son tan frecuentes en estos sistemas, comparado con nuestro propio Sistema Solar. Por último, intentamos relacionar estos modelos con la hipótesis de migración planetaria, buscando límites en su extensión y en los posibles mecanismos que le dieron origen.

Investigation of alternative mechanisms to neutrino oscillations in the MINOS experiment; Investigacao de Mecanismos Alternativos a Oscilacao de Neutrinos no Experimentos MINOS (in Spanish)

DOE Office of Scientific and Technical Information (OSTI.GOV)

de Abreu Barbosa Coelho, Joao

The neutrino oscillation model is very successful in explaining a large variety of experiments. The model is based on the premise that the neutrinos that interact through the weak force via charged current are not mass eigenstates, but a superposition of them. In general, a quantum superposition is subject to loss of coherence, so that pure states tend toward mixed states. This type of evolution is not possible within the context of isolated quantum systems because the evolution is unitary and, therefore, is invariant under time reversal. By breaking unitarity, an arrow of time is introduced and the characteristic effectmore » for neutrinos is a damping of oscillations. In this thesis, some phenomenological decoherence and decay models are investigated, which could be observed by MINOS, a neutrino oscillation experiment that consists of measuring the neutrino flux produced in a particle accelerator 735 km away. We analyse the disappearance of muon neutrinos in MINOS. Information from other experiments is used to constrain the number of parameters, leaving only one extra parameter in each model. We assume a power law energy dependence of the decoherence parameter. The official MINOS software and simulation are used to obtain the experiment's sensitivities to the effects of unitarity breaking considered.« less

The recycling of chromitites in ophiolites from southwestern North America

NASA Astrophysics Data System (ADS)

González-Jiménez, José M.; Camprubí, Antoni; Colás, Vanessa; Griffin, William L.; Proenza, Joaquín A.; O'Reilly, Suzanne Y.; Centeno-García, Elena; García-Casco, Antonio; Belousova, Elena; Talavera, Cristina; Farré-de-Pablo, Júlia; Satsukawa, Takako

2017-12-01

Podiform chromitites occur in mantle peridotites of the Late Triassic Puerto Nuevo Ophiolite, Baja California Sur State, Mexico. These are high-Cr chromitites [Cr# (Cr/Cr + Al atomic ratio = 0.61-0.69)] that contain a range of minor- and trace-elements and show whole-rock enrichment in IPGE (Os, Ir, Ru). That are similar to those of high-Cr ophiolitic chromitites crystallised from melts similar to high-Mg island-arc tholeiites (IAT) and boninites in supra-subduction-zone mantle wedges. Crystallisation of these chromitites from S-undersaturated melts is consistent with the presence of abundant inclusions of platinum-group minerals (PGM) such as laurite (RuS2)-erlichmanite (OsS2), osmium and irarsite (IrAsS) in chromite, that yield TMA ≈ TRD model ages peaking at 325 Ma. Thirty-three xenocrystic zircons recovered from mineral concentrates of these chromitites yield ages (2263 ± 44 Ma to 278 ± 4 Ma) and Hf-O compositions [ɛHf(t) = - 18.7 to + 9.1 and 18O values < 12.4‰] that broadly match those of zircons reported in nearby exposed crustal blocks of southwestern North America. We interpret these chromitite zircons as remnants of partly digested continental crust or continent-derived sediments on oceanic crust delivered into the mantle via subduction. They were captured by the parental melts of the chromitites when the latter formed in a supra-subduction zone mantle wedge polluted with crustal material. In addition, the Puerto Nuevo chromites have clinopyroxene lamellae with preferred crystallographic orientation, which we interpret as evidence that chromitites have experienced high-temperature and ultra high-pressure conditions (< 12 GPa and 1600 °C). We propose a tectonic scenario that involves the formation of chromitite in the supra-subduction zone mantle wedge underlying the Vizcaino intra-oceanic arc ca. 250 Ma ago, deep-mantle recycling, and subsequent diapiric exhumation in the intra-oceanic basin (the San Hipólito marginal sea) generated during an

Late Paleozoic fusulinids from Sonora, Mexcio: importance for interpretation of depositional settings, biogeography, and paleotectonics

USGS Publications Warehouse

Stevens, Calvin H.; Poole, Forrest G.; Amaya-Martínez, Ricardo

2014-01-01

Three sets of fusulinid faunas in Sonora, Mexico, discussed herein, record different depositional and paleotectonic settings along the southwestern margin of Laurentia (North America) during Pennsylvanian and Permian time. The settings include: offshelf continental rise and ocean basin (Rancho Nuevo Formation in the Sonora allochthon), shallow continental shelf (La Cueva Limestone), and foredeep basin on the continental shelf (Mina México Formation). Our data represent 41 fusulinid collections from 23 localities with each locality providing one to eight collections.Reworked fusulinids in the Middle and Upper Pennsylvanian part of the Rancho Nuevo Formation range in age from Desmoinesian into Virgilian (Moscovian-Gzhelian). Indigenous Permian fusulinids in the La Cueva Limestone range in age from middle or late Wolfcampian to middle Leonardian (late Sakmarian-late Artinskian), and reworked Permian fusulinids in the Mina México Formation range in age from early to middle Leonardian (middle-late Artinskian). Conodonts of Guadalupian age occur in some turbidites in the Mina México Formation, indicating the youngest foredeep deposit is at least Middle Permian in age. Our fusulinid collections indicate a hiatus of at least 10 m.y. between the youngest Pennsylvanian (Virgilian) rocks in the Sonora allochthon and the oldest Permian (middle Wolfcampian) rocks in the region.Most fusulinid faunas in Sonora show affinities to those of West Texas, New Mexico, and Arizona; however, some genera and species are similar to those in southeastern California. As most species are similar to those east of the southwest-trending Transcontinental arch in New Mexico and Arizona, this arch may have formed a barrier preventing large-scale migration and mixing of faunas between the southern shelf of Laurentia in northwestern Mexico and the western shelf in the southwestern United States.The Sonora allochthon, consisting of pre-Permian (Lower Ordovician to Upper Pennsylvanian) deep

Myth and catastrophic reality: using cosmogonic mythology to identify cosmic impacts and massive plinian eruptions in holocene South America.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Masse, W. B.

Major natural catastrophes (e.g., 'universal' floods, fire, darkness, and sky falling down) are prominently reflected in traditional South American creation myths, cosmology, religion, and worldview. We are now beginning to recognize that cosmogonic myths represent a rich and largely untapped data set concerning the most dramatic natural events and processes experienced by each cultural group during the past several thousand years. Observational details regarding specific catastrophes are encoded in myth storylines, typically cast in terms of supernatural characters and actions. Not only are the myths amenable to scientific analysis, but also some sets of myths encode multiple catastrophes in meaningfulmore » relative chronological order. The present study considers more than 4200 myths, including more than 260 'universal' catastrophe myths from cultural groups throughout South America. These myths are examined in light of available geological, paleoenvironmental, archeological, and documentary evidence. Our analysis reveals three possible ultra-plinian volcanic eruptions, two in Columbia and the other in the Gran Chaco, the latter likely associated with a poorly dated late Holocene eruption of Nuevo Mundo in central Bolivia. Our analysis also identifies a set of traditions likely linked with the well-known Campo del Cielo iron meteorite impact in northern Argentina originally hypothesized to have occurred around 4000 years ago. Intriguingly, these traditions strongly suggest that the Campo del Cielo impact triggered widespread mass fires in the Gran Chaco region and possibly in the Brazilian Highlands. Several other potential cosmic impacts, distinct from Campo del Cielo, are hinted at in the mythology of other locations in South America. The numerous catastrophe myths in the Gran Chaco region exhibit the most coherent chronological sequence of any South American region. The sequence begins with a 'Great Flood,' by far the most widespread catastrophe myth in

The Parent Magmas of the Cumulate Eucrites: A Mass Balance Approach

NASA Technical Reports Server (NTRS)

Treiman, Allan H.

1996-01-01

The cumulate eucrite meteorites are gabbros that are related to the eucrite basalt meteorites. The eucrite basalts are relatively primitive (nearly flat REE patterns with La approx. 8-30 x CI), but the parent magmas of the cumulate eucrites have been inferred as extremely evolved (La to greater than 100 x CI). This inference has been based on mineral/magma partitioning, and on mass balance considering the cumulate eucrites as adcumulates of plagioclase + pigeonite only; both approaches have been criticized as inappropriate. Here, mass balance including magma + equilibrium pigeonite + equilibrium plagiociase is used to test a simple model for the cumulate eucrites: that they formed from known eucritic magma types, that they consisted only of magma + crystals in chemical equilibrium with the magma, and that they were closed to chemical exchange after the accumulation of crystals. This model is tested for major and Rare Earth Elements (REE). The cumulate eucrites Serra de Mage and Moore County are consistent, in both REE and major elements, with formation by this simple model from a eucrite magma with a composition similar to the Nuevo Laredo meteorite: Serra de Mage as 14% magma, 47.5% pigeonite, and 38.5% plagioclase; Moore County as 35% magma, 37.5% pigeonite, and 27.5% plagioclase. These results are insensitive to the choice of mineral/magma partition coefficients. Results for the Moama cumulate eucrite are strongly dependent on choice of partition coefficients; for one reasonable choice, Moama's composition can be modeled as 4% Nuevo Laredo magma, 60% pigeonite, and 36% plagioclase. Selection of parent magma composition relies heavily on major elements; the REE cannot uniquely indicate a parent magma among the eucrite basalts. The major element composition of Y-791195 can be fit adequately as a simple cumulate from any basaltic eucrite composition. However, Y-791195 has LREE abundances and La/Lu too low to be accommodated within the model using any basaltic

"La Biblioteca Es Importante": A Case Study of an Emergent Bilingual Public Library in the Nuevo U.S. South

ERIC Educational Resources Information Center

Alvarez, Steven; Alvarez, Sara P.

2016-01-01

Research examining ethnolinguistic community schools (García, Zakharia, & Otcu, 2013) proposes that local spaces not directly affiliated with schools sustain bilingualism and identity. Though researchers often theorize about how community schools sustain home language literacies, less research examines how local public spaces sustain…

Investigator profile. An interview with Salvador Contreras Balderas, Ph.D. Interview by Vicki Glaser.

PubMed

Contreras Balderas, Salvador

2006-01-01

Dr. Contreras Balderas is Professor Emeritus in the Department of Biology at Universidad Autonoma de Nuevo Leon (Monterrey, Mexico). He received a Master's degree and Ph.D. in Biological Sciences from Tulane University (New Orleans, LA) and wrote his dissertation on Ichthyology. He was awarded the President's Excellence Award of the American Fisheries Society. Dr. Contreras Balderas is Founder, President, and Honorary Member of the Mexican Society of Zoology, the Ichthyological Society of Mexico, and the Desert Fishes Council, is an ex-officio member of the Coalition for the Sustainable Development of the Rio Grande/Rio Bravo, U.S. & Mexico, and is a member of the U.S. Fish and Wildlife's Rio Grande Fishes Recovery Team. Dr. Contreras Balderas's areas of expertise include fish faunas, fishes at risk, exotic species, aquatic restoration, environmental impacts as detected by fishes, integral conservation, integral basin/ecosystem management, and ecological evaluation of integrity in basins.

Estudio polarimétrico de NGC 104 (47 Tucanae)

NASA Astrophysics Data System (ADS)

Forte, J. C.; Bassino, L. P.; Vega, E. I.; Cellone, S.; Pellizza, L.; Méndez, M.

Se presentan observaciones polarimétricas en el Visual y sin filtro para 72 estrellas, 14 zonas de referencia y el núcleo del cúmulo globular NGC 104. Las medidas, hechas en el CASLEO con el nuevo polarimétro CASPROF, muestran un comportamiento complejo que incluye: a) dos componentes de polarización a lo largo de la visual; b) signos de envolturas polvorientas en 8 de 10 estrellas variables de largo período pertenecientes al cúmulo c) media docena de estrellas con alta polarización residual (P> 0.20 %) originada probablemente en scattering. Estas estrellas se encuentran próximas a una estructura extendida, coincidente con la región central del cúmulo, detectada en observaciones IRAS. Las observaciones son consistentes con la presencia de pequeñas cantidades de polvo originada en procesos de pérdida de masa.

[Technical efficiency in primary care for patients with diabetes].

PubMed

Salinas-Martínez, Ana María; Amaya-Alemán, María Agustina; Arteaga-García, Julio César; Núñez-Rocha, Georgina Mayela; Garza-Elizondo, María Eugenia

2009-01-01

To quantify the technical efficiency of diabetes care in family practice settings, characterize the provision of services and health results, and recognize potential sources of variation. We used data envelopment analysis with inputs and outputs for diabetes care from 47 family units within a social security agency in Nuevo Leon. Tobit regression models were also used. Seven units were technically efficient in providing services and nine in achieving health goals. Only two achieved both outcomes. The metropolitan location and the total number of consultations favored efficiency in the provision of services regardless of patient attributes; and the age of the doctor, the efficiency of health results. Performance varied within and among family units; some were efficient at providing services while others at accomplishing health goals. Sources of variation also differed. It is necessary to include both outputs in the study of efficiency of diabetes care in family practice settings.

Evidence for Subsolidus Metasomatism in the Eucrite Parent Body

NASA Technical Reports Server (NTRS)

McCallum, I. Stewart; Schwartz, Jeffrey M.; Mullen, Emily K.

2004-01-01

The eucrite parent body (4Vesta) was continuously and rapidy resurfaced by basaltic lavas that formed the non-cumulate eucrites. Ophitic and variolitic textures have been preserved even though eucrites exhibit varying degrees of equilibration based on the extent of thermal metamorphism. Types range from least metamorphosed (type 1) to most metamorphosed (type 7) based in part on the interpretation of textures and compositional zoning profiles within pigeonitic pyroxenes. To provide constraints on the source and duration of the heating event responsible for metamorphism we have investigated primary and secondary textural and compositional relations in noncumulate eucrites with emphasis on subsolidus textures developed in pyroxenes. We have studied examples of most metamorphic types including Pasamonte (type 2) Stannern (4), Nuevo Laredo (4), Juvinas (5), Lakangaon (5), Millbillillie (6), Palo Blanco Creek (7), Jonzac (7), Haraiya (7), along with the cumulate eucrites Moama and Moore County.

Genetic structure of Mexican Mestizo women with breast cancer based on three STR loci.

PubMed

Calderón-Garcidueñas, Ana L; Rivera-Prieto, Roxana A; Ortíz-Lopez, Rocio; Rivas, Fernando; Barrera-Saldaña, Hugo A; Peñaloza-Espinosa, Rosenda I; Cerda-Flores, Ricardo M

2008-01-01

The aim of this population genetics study was to compare the genetic structure of Mexican women with breast cancer (BrCa) with previously reported data of four random populations (Nuevo León, Hispanics, Chihuahua, and Central Region of Mexico). A sample of 115 unrelated women with BrCa and whose four grandparents were born in five zones of Mexico were interviewed at a reference hospital in Northeastern Mexico. Noncodifying STRs D7S820, D13S317, and D16S39 were analyzed; genotype distribution was in agreement with Hardy-Weinberg expectations for all three markers. Similar allele frequencies among four random populations and this selected population were found. According with this and previous studies using molecular and nonmolecular nuclear DNA markers not associated with any disease, Mexican Mestizo population is genetically homogeneous and therefore, genetic causes of BrCa are less heterogeneous, simplifying genetic epidemiologic studies.

Fruit Flies of the Genus Anastrepha (Diptera: Tephritidae) From Some Localities of Paraguay: New Records, Checklist, and Illustrated Key

PubMed Central

Arias, Osmar René; Fariña, Nelson Librado; Lopes, Gleidyane Novaes; Uramoto, Keiko; Zucchi, Roberto Antonio

2014-01-01

Abstract This study deals with fruit flies of the genus Anastrepha Schiner (Diptera: Tephritidae) collected in McPhail traps in the municipalities of Concepción, Belén, Horqueta, Loreto (state of Concepción) and Santa Rosa (state of Misiones), Paraguay. In total, 17 species were captured, 9 of which are new records for Paraguay. All morphological characters used for species identification are illustrated. RESUMEN. Se estudió las especies de moscas de las frutas del género Anastrepha Schiner (Diptera: Tephritidae), colectadas en trampas tipo McPhail en las localidades de Concepción, Belén, Horqueta (Departamento de Concepción) y Santa Rosa (Departamento de Misiones). En total fueron capturadas 17 especies, de las cuales nueve especies corresponden a nuevos registros para el Paraguay. Todos los caracteres morfológicos para la identificación de las especies fueron ilustrados. PMID:25525098

Sobre la terapia génica para enfermedades de la retina.

PubMed

Fischer, M Dominik

2017-07-11

Las mutaciones en un gran número de genes provocan degeneración de la retina y ceguera sin que exista actualmente cura alguna. En las últimas décadas, la terapia génica para enfermedades de la retina ha evolucionado y se ha convertido en un nuevo y prometedor paradigma terapéutico para estas enfermedades poco comunes. Este artículo refleja las ideas y los conceptos que parten de la ciencia básica hacia la aplicabilidad de la terapia génica en el ámbito clínico. Se describen los avances y las reflexiones actuales sobre la eficacia de los ensayos clínicos en la actualidad y se discuten los posibles obstáculos y soluciones de cara al futuro de la terapia génica para enfermedades de la retina. © 2017 S. Karger AG, Basel.

Grupos españoles de cálculos ab initio de moléculas de interés astrofísico

NASA Astrophysics Data System (ADS)

Yáñez, M.

Pocos campos de la química están tan bien adaptados a la modelización por medio de los métodos teóricos de la Química Cuántica como la Astroquímica y la Química de la Atmósfera, donde las interacciones moleculares son, generalmente, lo suficientemente pequeñas para que el modelo de molécula aislada funcione muy bien. En España son varios los grupos teóricos que dedican su esfuerzo de investigación, o parte de él, al estudio de moléculas o procesos de interés en Astrofísica o en atmósferas planetarias. Presentaremos diferentes ejemplos paradigmáticos de esta actividad en la que se exploran desde aspectos estructurales, hasta aspectos espectroscópicos y dinámicos. Entre los últimos, cabe destacar estudios en los que se demuestra la importancia de procesos a dos estados, prohibidos por espín, en la formación astrofísica de diversos derivados de interés. En el tratamiento espectroscópico se han hecho esfuerzos interesantes, que han aunado teoría y experimento, en el estudio de sistemas relevantes desde el punto de vista atmosférico, como los hidratos de ácido nítrico, o el tratamiento espectroscópico de moléculas no rígidas. No menos interesantes son los estudios de fotoabsorción de radicales o de procesos multifotónicos. Son particularmente abundantes los estudios dedicados a la reactividad específica de sistemas de interés astrofísico o atmosférico, con el objetivo de esclarecer vías de formación de determinados compuestos o de proporcionar mecanismos que permitan identificar las etapas reactivas limitantes de reacciones de interés en esos medios y sobre los que no existía información previa. Así, por ejemplo, se han publicado interesantes estudios sobre la formación o propiedades de compuestos de fósforo, de silico o de azufre o sobre mecanismos de reacción en los que intervienen el ozono, el radical nitrato, el radical OH u otras especies. Finalmente, son también particularmente relevantes los estudios que varios

Órbitas caóticas en satelites galácticos

NASA Astrophysics Data System (ADS)

Carpintero, D. D.; Muzzio, J. C.; Vergne, M. M.; Wachlin, F. C.

En trabajos anteriores investigamos las órbitas de estrellas que forman los satelites galácticos utilizando análisis de frecuencias. Su uso estaba plenamente justificado por su velocidad y la gran información que brinda, amén de haber dado resultados muy concordantes con los exponentes de Liapunov. Sin embargo, más recientemente, encontramos algunos problemas en la utilización del análisis de frecuencias en sistemas de referencia rotantes (como se utilizan para los satélites), por lo que en este trabajo rehicimos nuestras investigaciones previas utilizando exclusivamente exponentes de Liapunov. Algunas conclusiones anteriores se han confirmado, en tanto que otras deben modificarse. Además, los nuevos resultados muestran que las escalas de tiempo de los procesos caóticos en los satélites galácticos son comparables a, o más cortas que, las escalas de tiempo de otros procesos dinámicos característicos de estos objetos.

Relevamiento de HI en el Hemisferio Austral

NASA Astrophysics Data System (ADS)

Arnal, E. M.; Bajaja, E.; Morras, R.; Pöppel, W. G. L.

Un nuevo relevamiento de HI de todo el Hemisferio Austral, comprendido entre -90o <= δ <= -25o, está siendo observado con la antena I del IAR. El mismo es realizado con alta sensibilidad (r.m.s.<= 0.07 K) y alta resolución espectral (1 Km/s). Un total de ~50000 posiciones en el cielo serán observadas, espaciadas en una grilla (lxb) de (0.5o x 0.5o). El intervalo de velocidades cubierto en este relevamiento abarca el rango -450 km/s a +450 km/s en el sistema LSR. Esta base de datos será corregida por efectos de ``stray radiation''. Al presente se ha observado ~70% del total del relevamiento. El mismo es complementario de uno similar realizado en el Hemisferio Norte por Hartman y Burton (1996), con cubrimiento espacial, sensibilidad, resoluciones espaciales y en velocidad, similares a los del IAR. El objetivo final de ambos relevamientos es disponer de una base de datos uniforme en todo el cielo.

[Drug consumption and occupational violence in working women of Monterrey, N. L., Mexico].

PubMed

Alonso Castillo, Maria Magdalena; Caufield, Catherine; Gómez Meza, Marco Vinicio

2005-01-01

The purpose of this study was to explore drug consumption and occupational violence in a sample of 669 adult women, working and living in 13 basic geostatistical areas of Monterrey, Nuevo León, México, using a descriptive correlational design with a qualitative approach. Results indicated that 37.1% of women consumed alcohol, 29.1% tobacco, 0.4% marihuana, 0.1% inhalants, and, among medical drugs, 5% consumed tranquilizers, and 1% other substances (barbiturates, antidepressive agents, Tylenol/codeine). The c2 test found no significant difference between sociodemographic and occupational factors and drug consumption (p<.05), except for the work form (c2=18.08, gl=4, p=.001). However, violence rate showed a positive association with drug consumption (p<.05). This study found 126 cases of violence, 34 of which narrated their experience. Drug consumption and violence perception was identified in 2 categories: Conceptualization of Occupational Violence and Relationship between Violence and Drug Consumption.

Organochlorine residues in bat guano from nine Mexican caves, 1991.

PubMed

Clark, D R; Moreno-Valdez, A; Mora, M A

1995-08-01

: Samples of bat guano, primarily from Mexican free-tailed bats (Tadarida brasiliensis), were collected at nine bat roosts in caves in northern and eastern Mexico and analysed for organochlorine residues. DDE, the most abundant residue found in each cave, was highest (0.99 p.p.m. dry weight) at Ojuela Cave, Durango. Other studies of DDE in bat guano indicate that this concentration is too low to reflect harmful concentrations in the bats themselves. The DDE at Ojuela may represent either lingering residues from use of DDT years ago in the Ojuela area of perhaps depuration loss from migrant bats with summer maternity roost(s) in a DDE-contaminated area such as Carlsbad Cavern, New Mexico. Presence of o,p'-DDT at Tio Bartolo Cave, Nuevo Leon, indicates recent use of DDT, but the concentration of this contaminant was low. Possible impacts on bat colonies of the organophosphorus and carbamate insecticides now in extensive use are unknown.

Geographic Distribution of Hantaviruses Associated with Neotomine and Sigmodontine Rodents, Mexico

PubMed Central

Milazzo, Mary L.; Cajimat, Maria N.B.; Romo, Hannah E.; Estrada-Franco, Jose G.; Iñiguez-Dávalos, L. Ignacio; Bradley, Robert D.

2012-01-01

To increase our knowledge of the geographic distribution of hantaviruses associated with neotomine or sigmodontine rodents in Mexico, we tested 876 cricetid rodents captured in 18 Mexican states (representing at least 44 species in the subfamily Neotominae and 10 species in the subfamily Sigmodontinae) for anti-hantavirus IgG. We found antibodies against hantavirus in 35 (4.0%) rodents. Nucleotide sequence data from 5 antibody-positive rodents indicated that Sin Nombre virus (the major cause of hantavirus pulmonary syndrome [HPS] in the United States) is enzootic in the Mexican states of Nuevo León, San Luis Potosí, Tamaulipas, and Veracruz. However, HPS has not been reported from these states, which suggests that in northeastern Mexico, HPS has been confused with other rapidly progressive, life-threatening respiratory diseases. Analyses of nucleotide sequence data from 19 other antibody-positive rodents indicated that El Moro Canyon virus and Limestone Canyon virus are geographically widely distributed in Mexico. PMID:22469569

Shell shape as a biomarker of marine pollution historic increase.

PubMed

Márquez, F; Primost, M A; Bigatti, G

2017-01-30

Buccinanops globulosus is a TBT sensitive marine gastropod, classified as a good indicator of imposex incidence and used as a model to study adverse contamination effects. Population and maritime industries has incremented pollution in Nuevo gulf harbor since 1970s, promoting morphological changes in B. globulosus shell shape. We study the shell shape of the species comparing present day's specimens from the harbor zone with those collected in the same zone before the increasing of maritime activity and pre-Hispanic archaeological Middens. We demonstrated that harbor pollution produces globular shell shape in B. globulosus, an effect that probably allows gastropods to isolate themselves from the external adverse environment. On the contrary, shells from pre-Hispanic periods, unpolluted sites and those collected before the expansion of maritime activities, presented an elongated shell shape. Our study confirms that shell shape variation in marine gastropods can be used as a biomarker of harbor pollution. Copyright © 2016 Elsevier Ltd. All rights reserved.

Nuevas observaciones de 3C10 con el VLA*: estudio de la expansión

NASA Astrophysics Data System (ADS)

Reynoso, E. M.; Moffett, D. A.:; Dubner, G. M.; Giacani, E. B.; Reynolds, S. P.; Goss, W. M.; Dickel, J.

Se presentan nuevos resultados sobre la expansión del remanente de la supernova de Tycho a lo largo de un intervalo de 10.9 años, comparando nuevas observaciones tomadas con el VLA a 1375 y 1635 MHz durante 1994 y 1995, con observaciones previas realizadas entre 1983 y 1984 (Dickel y col. ~1991 AJ 101, 2151), usando las mismas configuraciones, anchos de banda, calibradores y tiempos de integración. El coeficiente de expansión se calcula para sectores radiales de 4o de ancho cada uno, ajustando la correlación cruzada de las derivadas de los perfiles promedio para cada época. A partir de la expansión medida, se estima el índice (parámetro de expansión) de la ley potencial R∝ tm como m≡ d ln R/d ln t . Este valor se compara con coeficientes teóricos para diferentes fases evolutivas de remanentes de supernova.

Organochlorine residues in bat guano from nine Mexican caves, 1991

USGS Publications Warehouse

Clark, D.R.; Moreno-Valdez, A.; Mora, M.A.

1995-01-01

Samples of bat guano, primarily from Mexican free-tailed bats (Tadarida brasiliensis), were collected at nine bat roosts in caves in northern and eastern Mexico and analysed for organochlorine residues. DDE, the most abundant residue found in each cave, was highest (0.99 p.p.m. dry weight) at Ojuela Cave, Durango. Other studies of DDE in bat guano indicate that this concentration is too low to reflect harmful concentrations in the bats themselves. The DDE at Ojuela may represent either lingering residues from use of DDT years ago in the Ojuela area of perhaps depuration loss from migrant bats with summer maternity roost(s) in a DDE-contaminated area such as Carlsbad Cavern, New Mexico. Presence of o,p-DDT at Tio Bartolo Cave, Nuevo Leon, indicates recent use of DDT, but the concentration of this contaminant was low. Possible impacts on bat colonies of the organophosphorus and carbamate insecticides now in extensive use are unknown.

Organochlorine residues in bat guano from nine Mexican caves, 1991

USGS Publications Warehouse

Clark, D.R.; Moreno-Valdez, A.; Mora, M.A.

1995-01-01

Samples of bat guano, primarily from Mexican free-tailed bats (Tadarida brasiliensis), were collected at nine bat roosts in caves in northern and eastern Mexico and analysed for organochlorine residues. DDE, the most abundant residue found in each cave, was highest (0.99 p.p.m. dry weight) at Ojuela Cave, Durango. Other studies of DDE in bat guano indicate that this concentration is too low to reflect harmful concentrations in the bats themselves. The DDE at Ojuela may represent either lingering resides from use of DDT years ago in the Ojuela area or perhaps depuration loss from migrant bats with summer maternity roost(s) in a DDE-contaminated area such as Carlsbad Cavern, New Mexico. Presence of o,p'-DDT at Tio Bartolo Cave, Nuevo Leon, indicates recent use of DDT, but the concentration of this contaminant was low. Possible impacts on bat colonies of the organophosphorus and carbonate insecticides now in extensive use are unknown.

Soil chemistry and mineralogy of the Santa Cruz coastal terraces

USGS Publications Warehouse

Pinney, Colin; Aniku, Jacob; Burke, Raymond; Harden, Jennifer; Singer, Michael; Munster, Jennie

2002-01-01

Marine terraces in the central coast of California provide an opportunity to study a soil chronosequence in which similar materials (beach deposits) have been weathered under similar slope, climatic, and vegetation conditions during the Quaternary. The terraces between Santa Cruz and Año Nuevo, California, have been studied for decades and are thought to be one of the best example of marine terraces in California {Lawson (1893), Wilson (1907); Branner and others (1909), Rode (1930) Page and Holmes (1945), Alexander (1953), Bradley (1956, 1957, 1958, and 1965), Bradley and Addicott (1968), Clark (1966 and 1970), Jahns and Hamilton (1971), Lajoie and others (1972), Bradley and Griggs (1976). Hanks and others (1986), Aniku (1986), Fine and others (1988), Anderson (1990 and 1994), and Rosenbloom and Anderson (1994).} Here we report morphological, chemical, physical, and mineralogical data for the soils that were formed in deposits on the Santa Cruz marine terraces in order to examine soil characteristics as a function of increasing terrace age.

Discovery of a second population of white-collared seedeaters, Sporophila torqueola (Passeriformes: emberizidae) along the Rio Grande of Texas

USGS Publications Warehouse

Woodin, Marc C.; Skoruppa, Mary K.; Blacklock, Gene W.; Hickman, Graham C.

1999-01-01

The range of the white-collared seedeater (Sporophila torqueola), a tropical grassland species, extends from Central America northward along both coasts of Mexico (Eitniear, 1997), including Tamaulipas and Nuevo Leon (Howell and Webb, 1995). White-collared seedeaters historically occurred commonly in extreme southern Texas (Oberholser, 1974; Rappole and Blacklock, 1994). However, since about 1950, white-collared seedeaters have undergone a precipitous decline in south Texas. Studies during 1994-1996 identified only seven to nine breeding pairs in the only population known to occur in Texas, located ca. 55 km downriver of Laredo, Texas, in Zapata Co. (Eitniear, 1997). Outside of the historical range, very few records are documented. Oberholser (1974) reported that three white-collared seed- eater specimens were collected in 1948 in Webb Co., northwest of Laredo, and Arnold (1980) also collected a white-collared seedeater in Webb Co. Vagrants also have been sighted as far afield as Corpus Christi (Blacklock, 1964), ca. 200 km north of the Rio Grande (Fig. 1).

[Profile of sensitization to allergens in children with atopic dermatitis assisting to Allergology Service of University Hospital, Nuevo Leon, Mexico].

PubMed

Yong-Rodríguez, Adrián; Macías-Weinmann, Alejandra; Palma-Gómez, Samuel; Arias-Cruz, Alfredo; Pérez-Vanzzini, Rafael; Gutiérrez-Mujica, José Julio; González-Díaz, Sandra Nora

2015-01-01

Sensitization to allergens in atopic dermatitis patients is a risk factor for developing asthma and allergic rhinitis in the future,as well as an aggravating factor in the course of the disease. Recent studies have attributed the activity of the proteases of some antigens to cause a grater defect in the epithelial barrier and a more severe disease. To know the sensitization to allergens pattern in children with atopic dermatitis attended at Allergology Service of University Hospital of UANL, Mexico, and to know if these children have higher sensitization to antigens with proteolytic activity. A retrospective study was done reviewing the skin prick test reports done in our service to children ranging from 5 months to 16 years old, diagnosed with atopic dermatitis during a period of 2 years, from January 2012 to January 2014. The frequency of sensitization to aeroallergens and food were analyzed as well as the weal size (≥6mm) on the skin in response to each particular allergen in the case of food skin prick test. Reports of skin tests of 66 children, 30 boys and 36 girls, were included; 37 of children were sensitized to more than one allergen,18/66 had asthma and/or allergic rhinitis, 40/66 60% skin prick tests were positive to high activity protease aeroallergens (Dermatophagoides pteronyssinus/Dermatophagoides farinae). Regarding food, sensitization was seen in 38 children; fruits and vegetables were the two most common foods. Only seven children had skin prick weal bigger than 6 mm, mainly to egg, fish and cow's milk. Children with atopic dermatitis are often sensitized to high protease activity aeroallergens, polysensitization is very common and the association with airway allergy is seen early in life. Sensitization to food is also common in these patients, but only a small percentage showed a response large enough to be associated with disease severity.

Fungal spores in four catholic churches in the metropolitan area of Monterrey, Nuevo León State, Mexico--First study.

PubMed

Estrada, Alejandra Rocha; Torres, Elizabeth Molina; Vázquez, Marco Antonio Alvarado; Piñero, Jorge Luis Hernandez; Lucio, Marco Antonio Guzmán; Martínez, Sergio Manuel Salcedo

2015-01-01

About 500,000 species of fungi have been described to-date, although an estimated between 1 - 1.5 million species may occur. They have a wide distribution in nature, contributing to the decomposition of organic matter and playing a part in the biogeochemical cycles of major nutrients. A small number are considered pathogens of animals and plants. There is ample historical evidence that certain types of allergies are associated with fungi; exposure to fungal allergens occurs in both outdoor and indoor spaces. Many indoor allergens are the same as those found outside buildings, entering through windows and doors, ventilation systems, or through cracks or other fissures in the walls. To determine the diversity and abundance of fungal spores inside four churches in the metropolitan area of Monterrey city in Mexico. The study was carried out from July 2009 - January 2010 using a Hirst type volumetric collector (Burkard Manufacturing Co Ltd). A total of 31,629 spores from 54 taxa were registered in the four churches. The building that showed the highest amount of spores was the Santa Catarina Mártir Church with 12,766 spores, followed by Cristo Rey with 7,155 and Nuestra Señora del Roble with 6,887. Regularly high concentrations of spores were recorded from 14:00 - 20:00 hours. The highest concentration value was observed at the church of Santa Catarina Mártir at 16:00 hours with 1153 spores/m 3 air. The most abundant spores in the four churches studied corresponded to Cladosporium, the Aspergillus/Penicillium complex, Coprinus, Ganoderma, Curvularia and Ustilago.

Should the dose of folic acid be adjusted for Mexican population? The pilot prevention program implemented in Nuevo Leon, Mexico.

PubMed

Martinez de Villarreal, Laura E

2017-12-11

In 1980 Smithells et al. reported that the intake of folic acid (FA) prevents the recurrence of neural tube defects (NTDs) [1]. After this and several other studies were conducted, the intake of 400 micrograms of folic acid per day, at least three months before and three months during pregnancy for prevention of NTD, was proposed [2,3,4]. Other strategies were also developed to increase folate blood levels in woman of childbearing age such as promoting the consumption of folate rich foods and food fortification (flour and most recently rice) [5]. Nevertheless, results have not been as expected due to poor consumption of folic acid supplements [6]. As a result, in the year 2000, a novel strategy was developed in order to increase folate blood levels in Mexican women. The results of the strategy are presented, as well as, a discussion about how to personalize a program for different populations.

Spatial distribution of the larval indices of Aedes aegypti in Guadalupe, Nuevo León, Mexico, with circular distribution analysis.

PubMed

Mercado-Hernandez, Roberto; Fernández-Salas, Ildefonso; Villarreal-Martinez, Homero

2003-03-01

A census of all outdoor larval breeding sites (951) present in 361 dwellings in a neighborhood of Guadalupe in northeastern Mexico was conducted in October 1997 to determine larval indices of Aedes aegypti, and their relationship to human population density and vegetation type. Here we present a method that allows finding the direction and extrapolar flight range of vectors, as parameters in the dynamics of dengue transmission. By using circular statistics applied to each block of data, ranges (quartiles) were computed for larval index type, adult-child (a/c) relationship, and vegetation. Eight angles between 37 and 300 degrees were used. Circular distribution was determined by using mean angle (a) and argument (r) from the sum of ranges for each variable. Arguments corresponding to the mean angle of house (260 degrees), recipient (265 degrees), and Breteau (247 degrees) indices were 0.2321, 0.2331, and 0.2225, respectively. In addition, arguments for the mean angle of herbaceous (277 degrees), shrub (318 degrees), and arboreal (333 degrees) vegetation were 0.2589, 0.1984, and 0.2367, respectively, and the 3 were located in the 4th quadrant. The a/c relationship was in 282 degrees, with an argument of 0.2466, which indicates that in this neighborhood in southern Guadalupe, both the human population density and the larval indices were higher than in other areas.

Assessment of major ions and trace elements in groundwater supplied to the Monterrey metropolitan area, Nuevo León, Mexico.

PubMed

Mora, Abrahan; Mahlknecht, Jürgen; Rosales-Lagarde, Laura; Hernández-Antonio, Arturo

2017-08-01

The Monterrey metropolitan area (MMA) is the third greatest urban area and the second largest economic city of Mexico. More than four million people living in this megacity use groundwater for drinking, industrial and household purposes. Thus, major ion and trace element content were assessed in order to investigate the main hydrochemical properties of groundwater and determine if groundwater of the area poses a threat to the MMA population. Hierarchical cluster analysis using all the groundwater chemical data showed five groups of water. The first two groups were classified as recharge waters (Ca-HCO 3 ) coming from the foothills of mountain belts. The third group was also of Ca-HCO 3 water type flowing through lutites and limestones. Transition zone waters of group four (Ca-HCO 3 -SO 4 ) flow through the valley of Monterrey, whereas discharge waters of group 5 (Ca-SO 4 ) were found toward the north and northeast of the MMA. Principal component analysis performed in groundwater data indicates four principal components (PCs). PC1 included major ions Si, Co, Se, and Zn, suggesting that these are derived by rock weathering. Other trace elements such as As, Mo, Mn, and U are coupled in PC2 because they show redox-sensitive properties. PC3 indicates that Pb and Cu could be the less mobile elements in groundwater. Although groundwater supplied to MMA showed a high-quality, high mineralized waters of group 5 have NO 3 - concentrations higher than the maximum value proposed by international guidelines and SO 4 2- , NO 3 - , and total dissolved solid concentrations higher than the maximum levels allowed by the Mexican normative.

Educational Inequality in Nuevo Leon and Oaxaca, Mexico, 2008 and 2010: The Basis of an Uncertain Future for These Societies

ERIC Educational Resources Information Center

Pierdant R., Alberto I.; Rodríguez Franco, Jesús; Narro R., Ana Elena

2017-01-01

Education in society especially in Mexico, seems to be a powerful instrument of intergenerational social mobility to produce individuals with "capabilities and functions" allowing them to obtain a greater well-being. "Education as schooling," in the first instance, improves the individuals living conditions, since this is a…

TRANSMISIÓN VERTICAL DE HTLV-1 EN EL PERÚ

PubMed Central

Villaverde, Jorge Alarcón; Romaní, Franco Romaní; Torres, Silvia Montano; Zunt, Joseph R.

2012-01-01

La infección por el virus linfotrópico humano de células T tipo 1 (HTLV-1) ha sido descrita en muchas áreas del mundo, como en los países del Caribe, Japón, África, Oceanía y en Sudamérica. En la presente revisión definimos la endemicidad del HTLV-1 en el país, planteando cuatro criterios epidemiológicos. Luego discutimos el tema central de la revisión: la transmisión vertical del HTLV-1, que en nuestro país sería uno de los principales mecanismos de transmisión. Dentro del desarrollo de este aspecto en particular, presentamos una estimación de la tasa de transmisión vertical y los factores de riesgo asociados con la transmisión vertical sobre la base de una revisión exhaustiva de estudios nacionales y extranjeros. Con esta revisión pretendemos dar una primera aproximación al estudio de la trasmisión vertical de HTLV-1, un aspecto poco estudiado en nuestro medio. PMID:21537777

The early warning system of landslides and sediment runoffs using meteorological condition including rainfall-soil moisture index (Invited)

NASA Astrophysics Data System (ADS)

Kubota, T.; Silva, I. C.; Hasnawir, H.

2009-12-01

The research including observation of rain, soil moisture content and sediment discharge is conducted on a torrent in northern Kyushu whose geology consists of Paleozoic metamorphic rocks (mainly schist) and whose vegetation consists of mainly Japanese cypress and cedar. Soil depth is approximately 50cm in average and permeability k is 0.1~0.01 order. With data obtained by the observation for more than 4 years, standard rainfalls of warning and evacuation against the sudden sediment runoffs are analyzed. Then, the result was compared with the ones in Nuevo Leon Mexico (geology of schist, slate, k=0.01~0.001 order) and in southern Sulawesi Island Indonesia (volcanic geology, k=0.001~0.0001 order). Hitherto, various methods were proposed to analyze the warning critical standard for landslide disaster or large sediment discharge. In this study, we employed Hirano's element slope runoff theory, the Self Organized Criticality Assumption (SOC), and the Elementary Catastrophe Theory (ETC) to analyze the data, although the soil moisture fluctuation, meteorological condition such as upper air wind and dew point depression, the rainfall-soil moisture index provided by Japan Meteorological Agency was considered. The last one is a cutting edge technology based on the tank model calculation of soil moisture content combined with short term rainfall prediction which is a product of numerical simulation using radar image advection analysis compensated with surface rain data and with orographic rain effect. In Hirano's theory, we can describe the critical rain Rc and rain intensity Ric as following equation. Q/A/M/ cosθ = Ri ∫(r*cosθ)dt = Ri*R (1) ∴ Ric*Rc = C (2) Here, Q: sediment runoff or debris flow discharge, A: watershed area, M: function concerning with sediment deposit features on the upstream torrents or slopes (porosity, torrent bed slope gradient, sediment accumulation length and depth, cohesion), t: time, θ: torrent bed or hillside slope gradient, r: instant

Foundations of Forensic Meteoritics

NASA Astrophysics Data System (ADS)

Treiman, A. H.

1992-07-01

, soil) adhering to a meteorite are samples of the actual physical environment in which the meteorite rested. Adhesion may derive from chemical cementation (incl. rust from the meteorite), biologic activity (incl. desert varnish?), or impact processes [2]. Given the wide diversity of geological materials and processes on the Earth, adhering geological materials may be useful forensic tools. For instance, fall in a volcanic terrane may be inconsistent with adhering sediments of clean quartz sand. Biologic matter on meteorites includes animal and vegetable matter mixed with the adhering geological materials, lichens and other plants growing in place, and purposefully attached animal matter (e.g. insect eggs). The most useful biological data may be provided by pollen, which can often be referred unambiguously to genera and species of plants. For example, sediments adhering to meteorites from the central Nullabor Plain (W. Australia) are different from sediments from the Plain's margin in S. Australia. Sediment on meteorites from the central Nullabor (e.g. Mundrabilla) lacks quartz sand and consists almost entirely of clay-sized particles, consistent with derivation from the local saprolitic soil. Sediment on meteorites from the eastern Nullabor (e.g. Hughes and Cook, S.A.) contains a significant fraction of quartz sand, 1/4- to 1/2-mm grains, probably blown from the Great Victoria Desert to the north and northwest. However, sedimentologic data alone may be misleading. For instance, sediments adhering to Nuevo Mercurio stones (H5; Zacatecas, Mexico) are clay-sized and lack coarser material. But sediment on Nuevo Mercurio (b), a ureilite found in the Nuevo Mercurio strewn field, consists of quartz sand and clay pellets, 1/4 to 1/2 mm diameter. Clearly, local environments may affect the character of sediment adhering to a meteorite, and careful detailed study may be required to determine whether a meteorite has been transported. I am grateful to R. Farrell and D. New for

A causa das estações do ano: modelos mentais

NASA Astrophysics Data System (ADS)

de Campos, J. A. S.; de Araujo, J. F. S.

2003-08-01

A década de 70 do século passado foi marcada pelo estudo das concepções alternativas que os alunos trazem para a sala de aula. A identificação destas concepções foi o ponto de partida para promover a mudança conceitual, onde as pré-concepções seriam trocadas pelas concepções científicas. Na década seguinte, surgiram muitas propostas de estratégias educacionais para facilitar esta troca, na sua maioria baseadas na idéia do conflito cognitivo, proposta por Piaget. Entretanto, os resultados pouco animadores conduziram à percepção de que a mudança conceitual é um processo mais complexo. Pelas idéias da Ciência Cognitiva, a mudança conceitual é uma mudança progressiva dos modelos mentais que o aluno tem sobre o mundo físico, através de enriquecimento e revisão. A causa das Estações do Ano é um tópico sobre o qual a maioria dos estudantes apresenta concepções alternativas. Os autores fizeram um levantamento sobre as pré-concepções encontradas em trabalhos sobre o tema (16 referências), procurando encontrar elementos comuns que indicassem a presença de modelos mentais específicos. As pré-concepções encontradas na literatura foram obtidas usando-se diversas metodologias (desde entrevistas clínicas até questionários de múltipla escolha) e envolvendo alunos e professores de diferentes regiões geográficas. A partir de uma análise aprofundada de cada trabalho, e utilizando-se a técnica das Redes Sistêmicas, chegou-se a conclusão que as diversas pré-concepções identificadas (em torno de 50), poderiam ser representadas por 6 modelos mentais, onde a explicação da causa das estações do ano tem um mecanismo causal responsável. Os mecanismos causais identificados foram: a dependência da distância, a dependência da orientação, a dependência conjunta da distância e orientação, a dependência da obstrução, a dependência da velocidade e a dependência da inclinação dos raios solares. Foram ainda identificadas

Investigaccion-accion en la sala de clases sobre las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios y su relacion reciproca con el aprendizaje de las ciencias biologicas

NASA Astrophysics Data System (ADS)

Cordova-Santiago, Lizzette Astrid

La investigacion---accion que se llevo a cabo en la sala de clases tenia como punto de partida las creencias de la cultura de la ciencia de un grupo de estudiantes universitarios para luego examinar sus implicaciones en el proceso de aprendizaje de las Ciencias Biologicas. ¿Que se supone que hagan las creencias en relacion con el aprendizaje? ¿En que consiste incorporar este aspecto a la practica educativa universitaria? Utilizando el modelo de Kemmis y McTaggart (1987) la investigacion-accion se planteo como un proceso dinamico en cuatro momentos en espiral constituidos por la planificacion, la accion, la observacion y la reflexion. Cada una de las fases tuvo una intencion retrospectiva y prospectiva formando una espiral de autorreflexion del conocimiento y la accion. Se llevaron a cabo audio grabaciones en clases y analisis de documentos. Ademas, la profesora-investigadora hizo un portafolio para reflexionar sobre las creencias de la cultura de la ciencia que tienen los estudiantes y las creencias del aprendizaje que tiene la profesora y sobre como la comprension de estos elementos ayudo a mejorar su practica educativa a traves del tiempo. Los resultados obtenidos apuntan a que las creencias de la cultura de la ciencia que tiene el grupo de estudiantes son diversas. Ellos si creen que la ciencia tiene una cultura la cual describieron como: complicada y desconocida que evoluciona constantemente, que es un conjunto de metodos, que es altamente tecnologica, que resuelve problemas de salud, ayuda a interpretar la realidad del mundo que los rodea y su origen y que existen unas intersecciones entre la ciencia y el poder. Sobre las creencias del proceso de aprendizaje de la profesora-investigadora, estas senalan que el modelaje de actores, la vision de la academia que tiene ella asi como la participacion y negociacion entre todos los involucrados en el proceso educativo, son factores que inciden en el proceso de aprendizaje.

Inverted Temperature Loops in The Quiet Corona: Properties and Physical Origin

NASA Astrophysics Data System (ADS)

Huang, Z.; van der Holst, B.; Frazin, R. A.; Nuevo, F.; Vásquez, A. M.; Manchester, W.; Sokolov, I.; Gombosi, T. I.

2013-12-01

Huang et al. 2012 revealed the existence of inverted temperature ("down") loops, in which temperature decreases with height, as well as the usual ("up") loops, in which the temperature increases with height, in the quiet solar Corona. It was shown that the "down" loops are mostly located at low latitudes and "up" loops most often appear in high latitudes. A recent study by Nuevo et al. 2013 confirmed this discovery and further showed that the "down" loop population is greatest at solar minimum; and strongly decreases with solar activity. Moreover, the "down" loops were found to be associated with values of the plasma beta greater than about unity, while the "up" loops were associated with much smaller values of beta. Here, we review the properties of "up" and "down" loops, and employ a state-of-the-art global MHD model to understand the physics of these loops as well as to investigate their thermodynamic stability. The 3D MHD model uses a phenomenological wave dissipation model based on wave reflection (proportional to the Alfvén speed gradients) and turbulent dissipation.

Linfoma Nasal de Células T/Natural Killer Extranodal Refractario Mal Diagnosticado, Tratado de Manera Exitosa: Informe de Caso.

PubMed

Saavedra Ramírez, José Domingo

2017-01-01

El linfoma de células T/natural killer extranodal ("extranodal natural killer/T-cell lymphoma", ENKL) nasal es un linfoma no Hodgkin (LNH) agresivo y poco común para el cual no se ha establecido un tratamiento de referencia claro, especialmente en el escenario de la enfermedad recidivante/refractaria. Debido a su rareza, no se han llevado a cabo ensayos aleatorizados específicamente en ENKL nasal; sin embargo, los informes de caso y las series de caso pequeñas ofrecen un conocimiento importante sobre nuevos tratamientos potenciales. Presentamos el informe de caso de un paciente con ENKL nasal (previamente mal diagnosticado como una sinusitis crónica recidivante) en quien la enfermedad progresó durante la quimioterapia con múltiples agentes pero respondió al tratamiento de segunda línea con pralatrexato como agente único. Analizamos opciones de tratamiento para el ENKL nasal recidivante/refractario y sugerimos que el pralatrexato se evalúe más a fondo en este escenario clínico.

The differentiation of eucrites: The role of in situ crystallization

NASA Astrophysics Data System (ADS)

Barrat, J. A.; Blichert-Toft, J.; Gillet, Ph.; Keller, F.

2000-09-01

We report on major and trace element analyses of 17 eucrites, including three cumulate eucrites (Binda, Moore County, and Serra de Magé), determined by, respectively, ICP-AES and ICP-MS. The results obtained for Binda and Moore County are consistent with the model of Treiman (1997) for the formation of cumulate eucrites, which holds that these meteorites were produced from a eucritic melt. Our sample of Serra de Magé contains unusually large amounts of pyroxene and probably an accessory phase rich in HREEs and is therefore not representative of this eucrite as known from literature data. Our results for the noncumulate eucrites Bereba, Bouvante, Cachari, Caldera, Camel Donga, Ibitira, Jonzac, Juvinas, Lakangaon, Millbillillie, Padvarninkai, Pasamonte, Sioux County and Stannern are in good agreement with literature data. The observed decoupling between major and trace elements for noncumulate eucrites can be explained by in-situ crystallization during the differentiation of an asteroidal magma ocean. This model can further account for both the Nuevo Laredo and the Stannern trends but has as a consequence that none of the analyzed eucrites represents a primary melt.

Well water quality in rural Nicaragua using a low-cost bacterial test and microbial source tracking.

PubMed

Weiss, Patricia; Aw, Tiong Gim; Urquhart, Gerald R; Galeano, Miguel Ruiz; Rose, Joan B

2016-04-01

Water-related diseases, particularly diarrhea, are major contributors to morbidity and mortality in developing countries. Monitoring water quality on a global scale is crucial to making progress in terms of population health. Traditional analytical methods are difficult to use in many regions of the world in low-resource settings that face severe water quality issues due to the inaccessibility of laboratories. This study aimed to evaluate a new low-cost method (the compartment bag test (CBT)) in rural Nicaragua. The CBT was used to quantify the presence of Escherichia coli in drinking water wells and aimed to determine the source(s) of any microbial contamination. Results indicate that the CBT is a viable method for use in remote rural regions. The overall quality of well water in Pueblo Nuevo, Nicaragua was deemed unsafe, and results led to the conclusion that animal fecal wastes may be one of the leading causes of well contamination. Elevation and depth of wells were not found to impact overall water quality. However rope-pump wells had a 64.1% reduction in contamination when compared with simple wells.

Implementation and adaptation in Colombia of the Communities That Care.

PubMed

Mejía-Trujillo, Juliana; Pérez-Gómez, Augusto; Reyes-Rodríguez, María Fernanda

2015-12-15

For more than two years, Corporación Nuevos Rumbos (Colombia) has been carrying out, in eight Colombian communities, a preventive system called Comunidades Que se Cuidan (CQC), an adaptation of Communities That Care (CTC), created at the University of Washington (Seattle), developed for more than 25 years in the United States of America and implemented in eight countries of America, Oceania, and Europe. The system is based on the public health approach, and the social development strategy for community empowerment. The core idea is to teach communities how to make decisions based on data regarding drugs and alcohol consumption and the identification of protective and risk factors, on the basis of the original survey validated in Colombia: these will allow communities to choose the best preventive interventions, tailored for each of them according to their needs. This paper describes the process of implementation of CQC in Colombia, its differences with CTC, the creation of Colombian cut-points, the main difficulties and how these were solved. CQC seems to be a preventive system with a wide potential applicability in other Latin American countries.

Direct Endonasal Approach with Partial Upper Posterior Septectomy. A “Rescue Flap” Technique Modification

PubMed Central

Sotomayor-González, Arturo; Díaz-Martínez, Armando José; Radillo-Gil, Ramón; García-Estrada, Everardo; Morales-Gómez, Jesús Alberto; Palacios-Ortiz, Isaac Jair; Pérez-Cárdenas, Samuel; Arteaga-Treviño, Mauricio; De León, Ángel Martínez-Ponce

2016-01-01

Objective Report a modification of the “rescue flap” technique using a direct endonasal approach with a partial superior septectomy for approaching pituitary tumors developed in our institution. Design Prospective study. Setting Hospital Universitario “Dr. José Eleuterio González,” Universidad Autónoma de Nuevo León. Main Outcome Measures Since April 2015, we have performed 19 cases employing a direct endonasal approach with partial superior septectomy. Results and a technical note are described below. Results Nineteen patients were included in this report. Six patients presented transoperatory cerebrospinal fluid (CSF) leak, so a nasoseptal rescue flap was harvested. No patients developed postoperative CSF leak in this group. Two patients were submitted to a second surgical procedure. Nasoseptal flap was harvested without complications. In both patients, the size of the flap was enough to cover the dural defect and avoid CSF leak. Conclusion Direct endonasal approach with a partial posterior septectomy allows enough exposition of the sphenoidal sinus while preserving the nasoseptal septum with the possibility of a successful rescue flap when needed. PMID:28321383

Direct Endonasal Approach with Partial Upper Posterior Septectomy. A "Rescue Flap" Technique Modification.

PubMed

Sotomayor-González, Arturo; Díaz-Martínez, Armando José; Radillo-Gil, Ramón; García-Estrada, Everardo; Morales-Gómez, Jesús Alberto; Palacios-Ortiz, Isaac Jair; Pérez-Cárdenas, Samuel; Arteaga-Treviño, Mauricio; De León, Ángel Martínez-Ponce

2017-04-01

Objective  Report a modification of the "rescue flap" technique using a direct endonasal approach with a partial superior septectomy for approaching pituitary tumors developed in our institution. Design  Prospective study. Setting  Hospital Universitario "Dr. José Eleuterio González," Universidad Autónoma de Nuevo León. Main Outcome Measures  Since April 2015, we have performed 19 cases employing a direct endonasal approach with partial superior septectomy. Results and a technical note are described below. Results  Nineteen patients were included in this report. Six patients presented transoperatory cerebrospinal fluid (CSF) leak, so a nasoseptal rescue flap was harvested. No patients developed postoperative CSF leak in this group. Two patients were submitted to a second surgical procedure. Nasoseptal flap was harvested without complications. In both patients, the size of the flap was enough to cover the dural defect and avoid CSF leak. Conclusion  Direct endonasal approach with a partial posterior septectomy allows enough exposition of the sphenoidal sinus while preserving the nasoseptal septum with the possibility of a successful rescue flap when needed.

órbitas: caos en familia

NASA Astrophysics Data System (ADS)

Carpintero, D. D.

Durante los últimos años, ha ido adquiriendo importancia la descripción dinámica de un sistema estelar a través de su estructura orbital, complementando el tradicional uso de la función de distribución en el espacio fase. El desarrollo de esta nueva concepción condujo, con el tiempo, a la conclusión de que las órbitas caóticas juegan un importante papel dinámico en modelos realistas de galaxias. Sin embargo, la determinación de la caoticidad de una órbita, o de la familia regular a la cual pertenece, siguió siendo una tarea artesanal. Nuevos métodos de clasificación fueron surgiendo con el tiempo; hoy en día, se cuenta con métodos que permiten determinar automáticamente el contenido orbital de cualquier potencial arbitrario que se desee para modelar una galaxia, o incluso determinar la familia de una órbita sin siquiera conocer el potencial en el que está sumergida.

Biochemical differences in ethnic groups in Durango, Mexico.

PubMed

Lares-Asseff, Ismael; Lujín-García, Azalia; Sosa-Macías, Martha; Lazalde-Ramos, Blanca; Loera-Castañeda, Veronica; Galaviz-Hernández, Carlos; Villanueva-Fierro, Ignacio

2012-01-01

The aim of this study was to assess biochemical differences between Tepehuano indigenous people, and Mennonite and Mestizo populations of Durango, Mexico. Our study involved 334 volunteers aged 15 to 80 years; 132 Mennonite and 130 Mestizo individuals from Nuevo Ideal Municipality and 72 Tepehuano indigenous people from Mezquital Durango were evaluated. A clinical history and fast determination of aspartate aminotransferase (AST), alanine aminotransferase (ALT), uric acid, urea and creatinine were performed on each studied case. Statistically significant differences between the three studied groups were found for age, weight and height (P < .05), with higher values observed in men. The highest plasma urea levels were found in Mennonite compared to Mestizo people, followed by the Tepehuano indigenous. Higher biochemical parameters were found in men (vs women) in the studied groups. The percentage of individuals with abnormal levels for AST, ALT and uric acid were higher in Tepehuano indigenous people than in Mestizo, whereas the urea and creatinine percentages were higher in Mestizo people. The differences found on biochemical tests, could be explained by differences in lifestyle such as diet and sanitary habits.

Linfoma Nasal de Células T/Natural Killer Extranodal Refractario Mal Diagnosticado, Tratado de Manera Exitosa: Informe de Caso

PubMed Central

Saavedra Ramírez, José Domingo

2017-01-01

El linfoma de células T/natural killer extranodal (“extranodal natural killer/T-cell lymphoma”, ENKL) nasal es un linfoma no Hodgkin (LNH) agresivo y poco común para el cual no se ha establecido un tratamiento de referencia claro, especialmente en el escenario de la enfermedad recidivante/refractaria. Debido a su rareza, no se han llevado a cabo ensayos aleatorizados específicamente en ENKL nasal; sin embargo, los informes de caso y las series de caso pequeñas ofrecen un conocimiento importante sobre nuevos tratamientos potenciales. Presentamos el informe de caso de un paciente con ENKL nasal (previamente mal diagnosticado como una sinusitis crónica recidivante) en quien la enfermedad progresó durante la quimioterapia con múltiples agentes pero respondió al tratamiento de segunda línea con pralatrexato como agente único. Analizamos opciones de tratamiento para el ENKL nasal recidivante/refractario y sugerimos que el pralatrexato se evalúe más a fondo en este escenario clínico. PMID:29430232

PIXE analysis of airborne particulate matter from Monterrey, Mexico. A first survey

NASA Astrophysics Data System (ADS)

Aldape, F.; Flores M, J.; Díaz, R. V.; Hernández-Méndez, B.; Montoya Z, J. M.; Blanco, E. E.; Fuentes, A. F.; Torres-Martínez, L. M.

1999-04-01

A first survey of elemental contents in airborne particulate matter from Monterrey, Nuevo León, Mexico, was performed using PIXE. This second largest industrial city is located 715 km north of Mexico City, and counts with a population of nearly three million inhabitants in its conurbation. Air pollution in the place comes from a great variety of industries ranging from iron smelters to furniture manufacturing, as well as from fuel combustion in vehicles and industries. This study presents results of elemental contents in airborne particulate matter in two particle size fractions: PM 2.5 and PM 15. The samples were collected during five weeks on working days, Monday-Friday, from 9 December 1996 to 14 January 1997. Two samples a day were collected, 12 h each, night-time and day-time. These first results show local pollution as typical from a large urban area in conjunction with an active industry. Thirteen elements were consistently detected in most of the samples and some episodes due to both industrial and human activities were identified. A general discussion about the results obtained is presented.

Cinética Química: el laboratorio

NASA Astrophysics Data System (ADS)

Cabañas Galán, B.

La interpretación de las transformaciones químicas que se producen en la atmósfera requiere un profundo conocimiento de la cinética, productos y mecanismos de reacción de las posibles interacciones que pueden ocurrir entre las distintas especies presentes en ella. Información cuantitativa de este tipo es un prerrequisito para la construcción de modelos numéricos adecuados que expliquen el comportamiento químico-físico de la atmósfera. Esta información se obtiene a partir de experimentos realizados en laboratorios y por tanto independiente de medidas atmosféricas, por lo que los modelos atmosféricos derivados de ellos, pueden usarse para diagnosticar y predecir adecuadamente el comportamiento atmosférico. En esta exposición se recogen las técnicas experimentales más extendidas para la obtención de datos cinéticos así como los métodos de análisis de datos más utilizados en el estudio de las distintas reacciones de interés atmosférico. Se analizan sus características generales así como su adecuación a los distintos tipos de reacciones.

Frequency and origin of G-6-PD deficiency among icteric newborns in the metropolitan area of Monterrey, Nuevo León, Mexico.

PubMed

González-Quiroga, G; Ramirez-Del Rio, J L; Cerda-Flores, R M; Garza-Chapa, R

1994-12-01

829 icteric newborn males were studied in order to have more information about the frequency of the G-6-PD deficiency and its origin in the population of the Monterrey Metropolitan area (MMA), in northeastern Mexico. For each subject information about the maternal grandparents' birthplace (states of Mexico) was gathered. The newborns were grouped into five geographic areas. It was found that the frequency of G-6-PD deficiency is higher in icterics than in normal newborns. The grandparents of the deficient newborns with variant B belonged to the northeastern states of Mexico where more European genetic contribution was present whereas most of the grandparents of the A- deficient newborns were from the gulf coast states, where the genetic contribution was African.

Depositional and provenance record of the Paleogene transition from foreland to hinterland basin evolution during Andean orogenesis, northern Middle Magdalena Valley Basin, Colombia

NASA Astrophysics Data System (ADS)

Moreno, Christopher J.; Horton, Brian K.; Caballero, Victor; Mora, Andrés; Parra, Mauricio; Sierra, Jair

2011-10-01

The Central Cordillera and Eastern Cordillera of the northern Andes form the topographic flanks of the north-trending Magdalena Valley Basin. Constraining the growth of these ranges and intervening basin has implications for Andean shortening and the transformation from a foreland to hinterland basin configuration. We present sedimentological, paleocurrent, and sandstone petrographic results from Cenozoic type localities to provide insights into the tectonic history of the northern Middle Magdalena Valley Basin of Colombia. In the Nuevo Mundo Syncline, the mid-Paleocene transition from marine to nonmarine deposystems of the Lisama Formation corresponds with a paleocurrent shift from northward to eastward transport. These changes match detrital geochronological evidence for a contemporaneous shift from cratonic (Amazonian) to orogenic (Andean) provenance, suggesting initial shortening-related uplift of the Central Cordillera and foreland basin generation in the Magdalena Valley by mid-Paleocene time. Subsequent establishment of a meandering fluvial system is recorded in lower-middle Eocene strata of the lower La Paz Formation. Eastward paleocurrents in mid-Paleocene through uppermost Eocene fluvial deposits indicate a continuous influence of western sediment source areas. However, at the upper middle Eocene (˜40 Ma) boundary between the lower and upper La Paz Formation, sandstone compositions show a drastic decrease in lithic content, particularly lithic volcanic fragments. This change is accompanied by a facies shift from mixed channel and overbank facies to thick, amalgamated braided fluvial deposits of possible fluvial megafans, reflecting changes in both the composition and proximity of western sediment sources. We attribute these modifications to the growing influence of exhumed La Cira-Infantas paleohighs in the axial Magdalena Valley, features presently buried beneath upper Eocene-Quaternary basin fill along the western flank of the Nuevo Mundo Syncline. In

A taxonomic monograph of the genus Tylodinus Champion (Coleoptera: Curculionidae: Cryptorhynchinae: Tylodina) of Chiapas, Mexico.

PubMed

Luna-Cozar, Jesús; Anderson, Robert S; Jones, Robert W; León-Corté, Jorge L

2014-04-15

The species of the genus Tylodinus from the Mexican state of Chiapas are revised. We examined 989 specimens representing 36 species; 23 species are grouped into eight species groups with 13 species considered as Incertae sedis. A total of 32 species are described as new and one species is a new record for México. Species groups  (numbers of species in parentheses) and species are: Tylodinus buchanani species group (6) T. buchanani new species (type locality: Chiapas, Unión Juárez, Volcán Tacan), T. exiguus new species (type locality: Chiapas, Motozintla, 7 km SSW Motozintla de Mendoza), T. ixchel new species (type locality: Chiapas, Unión Juarez, Volcán Tacan), T. jonesi new species (type locality: Chiapas, Angel Albino Corzo, Reserva de la Biosfera el Triunfo, Campamento el Quetzal), T. variabilis new species (type locality: Chiapas, San Cristóbal de las Casas, Cerro Huitepec), T. wibmeri new species (type locality: Chiapas, Motozintla, 7 km SSW Motozintla de Mendoza); Tylodinus canaliculatus species group (3) T. canaliculatus Champion (Chiapas, Unión Juárez, Volcán Tacan, new record for  México), T. sepulturaensis new species (Type locality: Chiapas, Villa Corzo, Ejido Sierra Morena), T. triumforium new species (Type locality: Chiapas, La Concordia, 4 km SE Custepec); Tylodinus cavicrus species group (3) T. cavicrus Champion, T. pseudocavicrus new species (type locality: Chiapas, San Cristóbal de las Casas, Cerro Huitepec), T. rugosus new species (type locality: Chiapas, Villa Flores, Sierra Morena); Tylodinus coapillensis species group (2) T. coapillensis new species (type locality: Chiapas, Coapilla, ca. 10.5 km NE Coapilla), T. leoncortesi new species (type locality: Chiapas, Pueblo Nuevo Solistahuacán, La Yerbabuena); Tylodinus mutabilis species group (2) Tylodinus mutabilis new species (type locality: Chiapas, Villa Corzo, Ejido Sierra Morena), T. parvus new species (type locality: Chiapas, Trinitaria, Lagunas de Montebello); Tylodinus

The reliability of continuous brain responses during naturalistic listening to music.

PubMed

Burunat, Iballa; Toiviainen, Petri; Alluri, Vinoo; Bogert, Brigitte; Ristaniemi, Tapani; Sams, Mikko; Brattico, Elvira

2016-01-01

Low-level (timbral) and high-level (tonal and rhythmical) musical features during continuous listening to music, studied by functional magnetic resonance imaging (fMRI), have been shown to elicit large-scale responses in cognitive, motor, and limbic brain networks. Using a similar methodological approach and a similar group of participants, we aimed to study the replicability of previous findings. Participants' fMRI responses during continuous listening of a tango Nuevo piece were correlated voxelwise against the time series of a set of perceptually validated musical features computationally extracted from the music. The replicability of previous results and the present study was assessed by two approaches: (a) correlating the respective activation maps, and (b) computing the overlap of active voxels between datasets at variable levels of ranked significance. Activity elicited by timbral features was better replicable than activity elicited by tonal and rhythmical ones. These results indicate more reliable processing mechanisms for low-level musical features as compared to more high-level features. The processing of such high-level features is probably more sensitive to the state and traits of the listeners, as well as of their background in music. Copyright © 2015 Elsevier Inc. All rights reserved.

Near-peer teaching strategy in a large human anatomy course: perceptions of near-peer instructors.

PubMed

Reyes-Hernández, Cynthia Guadalupe; Carmona Pulido, Juan Manuel; De la Garza Chapa, Roberto Isaac; Serna Vázquez, Ruth Patricia; Alcalá Briones, Ricardo Daniel; Plasencia Banda, Perla Marina; Villarreal Silva, Eliud Enrique; Jacobo Baca, Guillermo; de la Garza Castro, Oscar; Elizondo Omaña, Rodrigo Enrique; Guzmán López, Santos

2015-01-01

Near-peer teaching (NPT) is a strategy in which senior students assume the instructor role with junior peers (mentees). Senior students develop unique skills and knowledge through NPT, an experience which extends their learning beyond content mastery. Different teaching modules featuring NPT were utilized in the human anatomy course at the School of Medicine, Autonomous University of Nuevo Leon in Monterrey, Mexico. Modules included: Theory, Clinical Hour, Imaging Anatomy, and Laboratory. The aim of this study was to assess instructor participants' perceptions on the benefits of the NPT strategy in the anatomy classroom. A survey was administered to anatomy course instructors who utilized NPT strategies during winter, fall, and spring semesters of the 2012-2013 school year. A total of 120 instructors were enrolled in the study. There were different perceptions of instructors' roles. Theory and Imaging Anatomy instructors considered themselves to be information providers and resource developers, whereas Clinical Hour and Laboratory instructors saw themselves more as facilitators, role models, and planners. All instructors' opinions on the benefits of NPT were positive. Thus, in this article, the authors find NPT to be a strategy that promotes self-learning, a vital skill. © 2014 American Association of Anatomists.

PubMed

Valladares, Macarena; Campos, Brianda; Zapata, Camila; Durán Agüero, Samuel; Obregón, Ana María

2016-11-29

Introducción: existen características respecto a los ritmos circadianos (ciclo sueño-vigilia), lo que genera un rasgo denominado cronotipo (madrugador o trasnochador). Se ha asociado el cronotipo vespertino a menos horas de sueño y hábitos alimentarios poco saludables. El cronotipo vespertino se asocia con un mayor riesgo de desarrollar obesidad.Objetivo: determinar la asociación del cronotipo con variables antropométricas en jóvenes de 18 a 25 años.Métodos: jóvenes (n = 65) (18 a 25 años), se les determinó el cronotipo (cuestionario de Horne-Ostberg) y mediciones antropométricas (peso, talla, porcentaje de grasa y perímetro de cintura). Resultados: los hombres con cronotipo trasnochador presentaron significativamente mayor perímetro de cintura (p = 0,03). Las mujeres con un porcentaje de grasa < 25% se asoció con cronotipo trasnochador (p = 0,05). Conclusiones: el cronotipo trasnochador se asocia a mayor perímetro de cintura y mayor porcentaje de grasa. El cronotipo constituye un nuevo foco para la prevención y el tratamiento de la obesidad.

The Spherical Tokamak MEDUSA for Mexico

NASA Astrophysics Data System (ADS)

Ribeiro, C.; Salvador, M.; Gonzalez, J.; Munoz, O.; Tapia, A.; Arredondo, V.; Chavez, R.; Nieto, A.; Gonzalez, J.; Garza, A.; Estrada, I.; Jasso, E.; Acosta, C.; Briones, C.; Cavazos, G.; Martinez, J.; Morones, J.; Almaguer, J.; Fonck, R.

2011-10-01

The former spherical tokamak MEDUSA (Madison EDUcation Small Aspect.ratio tokamak, R < 0.14m, a < 0.10m, BT < 0.5T, Ip < 40kA, 3ms pulse) is currently being recomissioned at the Universidad Autónoma de Nuevo León, Mexico, as part of an agreement between the Faculties of Mech.-Elect. Eng. and Phy. Sci.-Maths. The main objective for having MEDUSA is to train students in plasma physics & technical related issues, aiming a full design of a medium size device (e.g. Tokamak-T). Details of technical modifications and a preliminary scientific programme will be presented. MEDUSA-MX will also benefit any developments in the existing Mexican Fusion Network. Strong liaison within national and international plasma physics communities is expected. New activities on plasma & engineering modeling are expected to be developed in parallel by using the existing facilities such as a multi-platform computer (Silicon Graphics Altix XE250, 128G RAM, 3.7TB HD, 2.7GHz, quad-core processor), ancillary graph system (NVIDIA Quadro FE 2000/1GB GDDR-5 PCI X16 128, 3.2GHz), and COMSOL Multiphysics-Solid Works programs.

DOE Office of Scientific and Technical Information (OSTI.GOV)

Castillo-Mejia, Fermin; Herrera-Velazquez, J. Julio E.; Gamboa-deBuen, I.

The Fuego Nuevo II (FN-II) dense plasma focus device is a small machine (4.6 kJ), operating at the Instituto de Ciencias Nucleares, UNAM, in which neutrons, as well as soft and hard X rays have been studied with a number of diagnostics. Neutrons are studied with silver activation counters, and scintillator-photomultiplier detectors, while their angular distribution inside and outside the discharge chamber have been studied with CR-39 plastic track detectors. The soft X rays are studied with a multiple-pin-hole camera and PIN diodes, while the hard X-rays are observed with the scintillator-photomultiplier detectors mentioned above. When a needle is insertedmore » on the inner electrode, a bright spot of hard x-rays can be concentrated, and used for the production of high-contrast radiography. Dosimetric measurements have been made for X-rays crossing a 300 micron aluminum window, through the axis of the machine, showing an average dose of 0.11{+-}0.01 mGy per shot. In contrast, the average dose with a hollow cathode is 0.077{+-}0.006 mGy per shot.« less

Updating the distribution and habitat pattern of Maurolicus stehmanni (Sternoptychidae, Stomiformes) in the Southwest Atlantic Ocean

NASA Astrophysics Data System (ADS)

Belleggia, Mauro; Villanueva-Gomila, Gabriela Lujan; Buratti, Claudio; Colombo, Gustavo Alvarez; Figueroa, Daniel Enrique; Venerus, Leonardo Ariel

2018-06-01

We updated the distribution and habitat patterns of Maurolicus stehmanni in the Southwest Atlantic Ocean by compiling data obtained from research surveys conducted on the Argentinean continental shelf, as well as from opportunistic records. This paper confirms the presence of M. stehmanni in the Argentinean continental shelf, extending its southernmost distributional limit by ca. 1000 km (from 43.0°S to 52.2°S). Adult specimens of M. stehmanni were collected in various locations from 2004 to 2016. Eggs and larvae of Maurolicus spp. were caught during ichthyoplankton tows carried out from 2003 to 2013. The present paper furthermore extends the habitat type in which this species was recorded: specimens were found in the inner continental shelf (between 46.2°S and 52.2°S) instead of the shelf break and continental slope. Two specimens were found lying dead upon the beach of Puerto Madryn, Nuevo Gulf (42.8°S). The presence of eggs and larvae in coastal embayments (San Matías and San José gulfs), in concomitant occurrence with adults, may suggest the establishment of this species in the region.

Nuevos resultados sobre la cinemática global y nuclear de NGC 253: movimientos no circulares y emisión en Br γ

NASA Astrophysics Data System (ADS)

Camperi, J. A.; Gunthardt, G. I.; Díaz, R. J.; Agüuero, M. P.; Gimeno, G.; Pessev, P.

Continuing with previous research (Camperi et al., BAAA, 54, 377, 2011), new heliocentric radial velocity distributions are presented for the nearby galaxy NGC 253, obtained from the ionized hydrogen recombination line Hα. These distributions have been derived from long-slit spectroscopy for various position angles. It is also shown the heliocentric radial velocity distribution corresponding to part of the infrared data (ionized hydrogen recombination line Brγ) observed with the Phoenix spectrograph of the Gemini South Observatory. Sequential mapping with the long slit using this instrument will enable to study in detail the kinematics of the galaxy's core, which is strongly obscured by dust. FULL TEXT IN SPANISH

New Data on Some Short-Lived Isotopes of Ruthenium and Rhodium; NUEVOS DATOS SOBRE ALGUNOS ISOTOPOS DE RUTENIO Y RODIO DE VIDA CORTA

DOE Office of Scientific and Technical Information (OSTI.GOV)

Baumgartner, F.; Bedmar, A.P.

1961-01-01

BS>Ru and Rh isotopes with mass numbers 107 and 108 and Rh/sup 109/ were obtained from fission products. Ru/sup 107/ was also prepared by the nuclear process Pd/sup 110/ (n, alpha ) Ru/sup 107/. Beta and gamma energies of these nuclides were studied spectrometrically and the gamma lines found for Ru/sup 107/ and Ru/sup 108/ (and daughter) were useful for the precise determination of their half lives. Rh/sup 109/ was identified through its daughter Pd/sup 109/ in the mixture of rhodium isotopes from fission products. lrradiation of natural paladium with fast neutrons led to an activity that may only bemore » attributed to Rh/ sup 110/. Neither its half life nor its decay energy was determined accurately. (auth)« less

Resistencia a antibióticos de última línea en cocos Gram positivos: la era posterior a la vancomicina

PubMed Central

Rincón, Sandra; Panesso, Diana; Díaz, Lorena; Carvajal, Lina P.; Reyes, Jinnethe; Munita, José M.; Arias, César A.

2015-01-01

En los últimos años se han desarrollado nuevas alternativas para el tratamiento de infecciones por patógenos Gram positivos multirresistentes, entre los cuales Staphylococcus aureus resistente a la meticilina (SARM) y los enterococos resistentes a la vancomicina (ERV) se consideran un verdadero reto terapéutico, y aunque el uso de la vancomicina en infecciones graves causadas por SARM ha generado serias dudas en los últimos años, continúa siendo escasa la información clínica de respaldo al uso de agentes terapéuticos que la superen en eficacia. El linezolid, la daptomicina y la tigeciclina son agentes que tienen actividad contra los cocos Gram positivos y que fueron aprobados e introducidos en la terapia clínica en la década pasada. Además, se han probado o están en las fases finales de desarrollo otros agentes como las cefalosporinas de última generación (ceftarolina y ceftobiprol). El propósito de esta revisión fue describir las nuevas alternativas terapéuticas, particularmente en la era posterior a la vancomicina, y repasar las características químicas más relevantes de los compuestos y su espectro de actividad, haciendo énfasis en sus mecanismos de acción y resistencia. PMID:24968051

Estudio de nuevos vidrios y materiales vitrocristalinos del sistema Li2O-CdO-SiO2 con posible utilidad en la industria nuclear

NASA Astrophysics Data System (ADS)

Rincon Lopez, Jesus M.

La electrodialisis es una tecnica que permite concentrar disoluciones salinas obteniendose como consecuencia de esta operacion dos corrientes acuosas: una concentrada en sales y otra diluida. La posibilidad de aplicar esta tecnica al tratamiento de residuos acuosos radiactivos ha sido puesta de manifiesto y en la actualidad existen instalaciones piloto en varios paises. Se ha estudiado el comportamiento de estroncio y cesio en el proceso por ser sus isotopos estroncio-90 y cesio-137 los productos de fision de vida mas larga producidos en los reactores de potencia.

[Analysis of the use of the Salinas forceps at the Gynecologic-Obstetric Hospital of Garza García, N.L. (Nuevo León)].

PubMed

de la Garza Quintanilla, C; González Salinas, M V; Celaya Juárez, J A

1995-09-01

Six hundred and thirteen cases of Salinas forceps application at Hospital de Ginecoobstetricia de Garza García, N.L. from November 1992 to April, 1993, were reviewed. The largest patients group, 20 to 29 years of age with 54.5%; primiparae were predominant with 55.9%, the largest amount of applications in term products, 80.8%; elective forceps with 72.5%; low application with 83.0%; medium 2.5%; episiotomy, medium, right lateral in all the cases; epidural block anesthesia in all the patients, and only one complication 0.1%; most frequent position variety OIA with 50%; and the smaller OIP with 2.6%; 96.3% of products weighted more than 2,500 g; and 87.1% with Apgar 8-9 at one minute. Maternal morbidity, 30.1%; fetal morbidity, 6.1%, with one case with facial paralysis (0.1%) by medium forceps. There were no maternal deaths; 3 antepartum fetal deaths; none postpartum.

[Epidemiology of gunshot wounds in the University Hospital "Dr. José Eleuterio González" of the Autonomous University of Nuevo León].

PubMed

Canseco Cavazos, José; Palacios-Zertuche, Jorge; Reyna-Sepúlveda, Francisco; Álvarez-Villalobos, Neri; Alatorre-López, Louisiana; Muñoz-Maldonado, Gerardo

The incidence of deaths and injuries associated with gunshot wounds deserves special attention, mainly because of its repercussions on hospital resources and the diagnosis and treatment protocols. To perform an analysis on the epidemiological factors associated with gunshot wounds. An analysis was made of multiple variables of all patients diagnosed with gunshot wounds during the period between 2005 and 2015. A total of 605 cases were found, and an additional sub-group of 314 cases was obtained for a deeper analysis. The overall mortality rate was 7.9%. The main anatomical region was the abdomen, with 44%. A total of 324 laparotomies were performed, 124 incisions of the thoracic wall, and 72 vascular examinations. In the sub-group of 314 cases, a 16.9% and 42% of laparotomies and vascular examinations, respectably, were reported without evidence of injury to internal organs. Morbidity and mortality increases when 2 or more wounds are present with multiple organ injuries, in patients with multiple transfusions, or in those transferred to the intensive care unit. The incorporation of a physical evaluation format by all the departments involved is suggested for patients that are attended with gunshot wounds, in order to obtain more epidemiological information of these injuries for further studies. Copyright © 2016 Academia Mexicana de Cirugía A.C. Publicado por Masson Doyma México S.A. All rights reserved.

Methodological considerations of acoustic playbacks to test the behavioral significance of call directionality in male northern elephant seals (Mirounga angustirostris)

NASA Astrophysics Data System (ADS)

Holt, Marla M.; Insley, Stephen J.; Southall, Brandon L.; Schusterman, Ronald J.

2005-09-01

While attempting to gain access to receptive females, male northern elephant seals form dominance hierarchies through multiple dyadic interactions involving visual and acoustic signals. These signals are both highly stereotyped and directional. Previous behavioral observations suggested that males attend to the directional cues of these signals. We used in situ vocal playbacks to test whether males attend to directional cues of the acoustic components of a competitors calls (i.e., variation in call spectra and source levels). Here, we will focus on playback methodology. Playback calls were multiple exemplars of a marked dominant male from an isolated area, recorded with a directional microphone and DAT recorder and edited into a natural sequence that controlled call amplitude. Control calls were recordings of ambient rookery sounds with the male calls removed. Subjects were 20 marked males (10 adults and 10 subadults) all located at An~o Nuevo, CA. Playback presentations, calibrated for sound-pressure level, were broadcast at a distance of 7 m from each subject. Most responses were classified into the following categories: visual orientation, postural change, calling, movement toward or away from the loudspeaker, and re-directed aggression. We also investigated developmental, hierarchical, and ambient noise variables that were thought to influence male behavior.

The mental well-being of Central American transmigrant men in Mexico.

PubMed

Altman, Claire E; Gorman, Bridget K; Chávez, Sergio; Ramos, Federico; Fernández, Isaac

2018-04-01

To understand the mental health status of Central American migrant men travelling through Mexico to the U.S., we analysed the association between migration-related circumstances/stressors and psychological disorders. In-person interviews and a psychiatric assessment were conducted in 2010 and 2014 with 360 primarily Honduran transmigrant young adult males. The interviews were conducted at three Casas del Migrante (or migrant safe houses) in the migration-corridor cities of Monterrey, and Guadalupe, Nuevo Leon; and Saltillo, Coahuila. The results indicated high levels of migration-related stressors including abuse and a high prevalence of major depressive episodes (MDEs), alcohol dependency, and alcohol abuse. Nested logistic regression models were used to separately predict MDEs, alcohol dependency, and alcohol abuse, assessing their association with migration experiences and socio-demographic characteristics. Logistic regression models showed that characteristics surrounding migration (experiencing abuse, migration duration, and attempts) are predictive of depression. Alcohol dependency and abuse were both associated with marital status and having family/friends in the intended U.S. destination, while the number of migration attempts also predicted alcohol dependency. The results provide needed information on the association between transit migration through Mexico to the U.S. among unauthorised Central American men and major depressive disorder and alcohol abuse and dependency.

[Not Available].

PubMed

San Mauro Martín, Ismael; Garicano Vilar, Elena; León Fernández, Joana; Ciudad Cabañas, María José; Collado Yurrita, Luis

2016-07-19

Introducción: recientemente ha surgido el interés por el posible papel de la microbiota intestinal como agente potenciador del rápido aumento que se está observando en el aumento de la prevalencia de obesidad en todo el mundo.Objetivos: relacionar las modificaciones que puede ocasionar el consumo de antibióticos en la microflora intestinal con la obesidad.Métodos: se extrajeron, de las Encuestas Nacionales de Salud de España, entre los años 2001 y 2011, las cifras de ingesta de antibióticos y la prevalencia (%) de obesidad en el mismo rango de edad, género y año. La media total de encuestados fue de 29.904 participantes.Resultados: se encontraron correlaciones significativas (p=0,09) en la asociación de la prevalencia de obesidad y la ingesta de antibióticos. Además, se objetivó que en el sexo masculino esta influencia es el doble que en el femenino.Conclusiones: los descubrimientos recientes en el campo de la microbiota intestinal y su relación con el huésped abren nuevos caminos en la comprensión de ciertas enfermedades inflamatorias y metabólicas, como la obesidad.

Nutritive and xenobiotic compounds in the alien algae Undaria pinnatifida from Argentine Patagonia.

PubMed

Gil, M N; Torres, A I; Commendatore, M G; Marinho, C; Arias, A; Giarratano, E; Casas, G N

2015-04-01

Seaweeds have been used as food since ancient times. The edible brown algae Undaria pinnatifida is native to northeast Asia; however, in 1992, the first specimens in Patagonian environments were found and, since then, have rapidly expanded. The main object of this study was to determine, for the first time in Argentina, the nutritive composition and concentrations of trace elements and hydrocarbons in these alien algae and evaluate their usefulness as food. Sexually mature U. pinnatifida samples were collected at 10-m depth in the Nuevo and San José gulfs. The first site is influenced by activities from Puerto Madryn city, and the latter place was considered as the control. Protein, dietary fiber, and mineral concentrations were similar in both gulfs and in the same order as in eastern countries. Crude protein, indigestible fiber, and calcium and magnesium concentrations were greatest in blade; lipid concentration was greatest in sporophyll; and sodium and potassium concentrations were greatest in midrib. Amino acids showed the greatest concentrations in blades, and these were greater than those reported in kelp from Japan. Cadmium (Cd), arsenic, mercury, and hydrocarbons were detected, but only Cd showed concentrations that could be a risk for consumption. In Argentina, maximum acceptable levels of these contaminants in seaweeds are not established.

Geological photointerpretation of the Paraguana Peninsula using ERTS-A multispectral photography. [Venezuela

NASA Technical Reports Server (NTRS)

Albrizzio, C.

1974-01-01

A methodology was developed to evaluate multispectral analysis of orbital imagery on the interpretation of geology, coastal geomorphology and sedimentary processes. The images analyzed were obtained during the pass of ERTS satellite over the center region of Venezuela on October 19, 1972. ERTS-1 multispectral images in black and white paper copies and transparencies of the 4 bands and false color composites at scales of 1:1,000,000 and 1:500,000 were interpreted. Lithology and outcrop patterns of the following geological formations have been interpreted: igneous and metamorphic basement of Cocodite and Santa Ana, Jurassic-Cretaceous metamorphics of Pueblo Nuevo, Cantaure Miocene-Pliocene sediments, and Quaternary alluvium, dunes, beach ridges, bars and reefs. A prominent and extensive Paraguana tonal anomaly shaped as an 8 has been discovered at the NW of the Peninsula. Its erosional origin has exposed light toned lower beds at the center, with additional evidence of topographic depression and development of underground drainage of karst origin. Coastal geomorphology, its processes and energy has been interpreted with the help of wind direction analysis (ENE-WSW) at sea level through the orientation of transported materials (water vapor, water and sediments) by clouds, waves, sea current, plumes of suspended sediments associated to river outlets, dunes, sediment sources and shore-line orientation.

La binaria LSS 3074 y su entorno: ?`una nueva asociación OB?

NASA Astrophysics Data System (ADS)

Niemela, V.; Morrell, N.; Corti, M.

En este trabajo presentamos un nuevo análisis orbital de LSS~3074, junto con tipos espectrales y velocidades radiales de estrellas que podrían constituir con ella una nueva asociación OB. La estrella O4f LSS3074 fue descubierta como binaria espectroscópica de corto período y líneas dobles por Morrell & Niemela (1990, ASP Conf. Ser. 7, 57). Posteriormente, Haefner et~al.(1994, IBVS 3969) encontraron variaciones fotométricas, estimando una inclinación orbital entre 50o y 55o. Teniendo en cuenta la importancia de obtener valores empíricos para las masas de estrellas O tempranas, y considerando la gran dispersión existente entre los valores observados y su discrepancia con los predichos por los modelos teóricos, hemos obtenido nuevas observaciones espectroscópicas de este sistema, con el propósito de mejorar los elementos orbitales derivados en la solución preliminar. Además, como las estrellas O tempranas suelen formar parte de cúmulos y asociaciones OB, hemos llevado a cabo una investigación espectroscópica de varias estrellas tempranas que podrían estar físicamente relacionadas con LSS~3074.

Population density of the western burrowing owl (Athene cunicularia hypugaea) in Mexican prairie dog (Cynomys mexicanus) colonies in northeastern Mexico.

PubMed

Ruiz Ayma, Gabriel; Olalla Kerstupp, Alina; Macías Duarte, Alberto; Guzmán Velasco, Antonio; González Rojas, José I

2016-08-26

The western burrowing owl (Athene cunicularia hypugaea) occurs throughout western North America in various habitats such as desert, short-grass prairie and shrub-steppe, among others, where the main threat for this species is habitat loss. Range-wide declines have prompted a need for reliable estimates of its populations in Mexico, where the size of resident and migratory populations remain unknown. Our objective was to estimate the abundance and density of breeding western burrowing owl populations in Mexican prairie dog (Cynomys mexicanus) colonies in two sites located within the Chihuahuan Desert ecoregion in the states of Nuevo Leon and San Luis Potosi, Mexico. Line transect surveys were conducted from February to April of 2010 and 2011. Fifty 60 ha transects were analyzed using distance sampling to estimate owl and Mexican prairie dog populations. We estimated a population of 2026 owls (95 % CI 1756-2336) in 2010 and 2015 owls (95 % CI 1573-2317) in 2011 across 50 Mexican prairie dog colonies (20,529 ha). The results represent the first systematic attempt to provide reliable evidence related to the size of the adult owl populations, within the largest and best preserved Mexican prairie dog colonies in Mexico.

Biostratigraphy and petrography of upper Paleozoic rocks of Sierra Las Pintas, northern Baja California

NASA Astrophysics Data System (ADS)

Navas-Parejo, Pilar; Lara-Peña, R. Aaron; Torres-Martínez, Miguel Angel; Martini, Michelangelo

2018-07-01

A transported crinoid fauna is herein described for the first time in the Paleozoic succession cropping out in the Sierra Las Pintas, northern Baja California, northwestern Mexico. The fossil association includes Heterostelechus texanus Moore and Jeffords, Preptopremnum laeve? Moore and Jeffords, and Mooreanteris perforatus Moore and Jeffords, which indicates a Middle Pennsylvanian-early Permian time-averaged age. The studied area corresponds with the northernmost outcrop of definitely late Paleozoic deep-water facies in northwestern Mexico and the southern United States. Petrographic analyses indicate that the studied metasandstones were primarily derived from high-grade metamorphic rocks and from a shallow-water platform environment dominated by crinoid meadows. These results allow the correlation of the studied metasedimentary rocks with the Carboniferous Rancho Nuevo Formation of the Sonora allochthon, which crops out in central Sonora. The Sonora allochthon includes an Early Ordovician-Late Pennsylvanian sedimentary succession that was deposited in the oceanic basin located south of the Laurentian craton. Therefore, upper Paleozoic metasedimentary rocks of the Sierra Las Pintas were deposited along the same continental margin of Laurentia as those rocks in the Sonora allochthon, and were mostly derived from metamorphic rocks of the continental craton and by the typical Carboniferous encrinites, which characterize the shallow-water rocks of central and northern Sonora.

Ajuste de parámetros libres en teorías de campos camaleones a partir de espectros de nubes moleculares galácticas y experimentos terrestres

NASA Astrophysics Data System (ADS)

Teppa Pannia, F. A.; Landau, S. J.

Resultados recientes, basados en el análisis de espectros moleculares de nubes galácticas a través del método del amoníaco, han arrojado nuevos límites sobre la variación del parámetro adimensional μ=m_e /m_p. Los resultados indican Δ μ/μ = (μ_{obs}-μ_{lab})/μ_{lab}= (2.2± 0.4_{est} ±0.3_{sist}) times 10 ^{-8}, en acuerdo con una variación no nula de dicha cantidad (Levshakov et al. 2010). En este trabajo, motivado por los datos astronómicos, estudiamos la solución lineal del modelo teórico fenomenológico de campo escalar camaleón, presentado por Mota y Shaw (2007), que predice variaciones en μ. Con el fin de cotejar estas predicciones con los resultados observacionales, utilizamos datos de experimentos terrestres que testean violaciones al Principio de Equivalencia para analizar el valor de los parámetros libres presentes en el modelo. El trabajo realizado muestra que la solución estudiada no se puede ajustar a los datos experimentales, sugiriendo que el modelo lineal debe ser descartado para explicar las observaciones astronómicas. FULL TEXT IN SPANISH

Seafloor geology of the Monterey Bay area continental shelf

USGS Publications Warehouse

Eittreim, S.L.; Anima, R.J.; Stevenson, A.J.

2002-01-01

Acoustic swath-mapping of the greater Monterey Bay area continental shelf from Point An??o Nuevo to Point Sur reveals complex patterns of rock outcrops on the shelf, and coarse-sand bodies that occur in distinct depressions on the inner and mid-shelves. Most of the rock outcrops are erosional cuestas of dipping Tertiary rocks that make up the bedrock of the surrounding lands. A mid-shelf mud belt of Holocene sediment buries the Tertiary rocks in a continuous, 6-km-wide zone on the northern Monterey Bay shelf. Rock exposures occur on the inner shelf, near tectonically uplifting highlands, and on the outer shelf, beyond the reach of the mud depositing on the mid-shelf since the Holocene sea-level rise. The sediment-starved shelf off the Monterey Peninsula and south to Point Sur has a very thin cover of Holocene sediment, and bedrock outcrops occur across the whole shelf, with Salinian granite outcrops surrounding the Monterey Peninsula. Coarse-sand deposits occur both bounded within low-relief rippled scour depressions, and in broad sheets in areas like the Sur Platform where fine sediment sources are limited. The greatest concentrations of coarse-sand deposits occur on the southern Monterey Bay shelf and the Sur shelf. ?? 2002 Elsevier Science B.V. All rights reserved.

Experiencias sobre el impacto del Programa de Formación en Ética de la Investigación Biomédica y Psicosocial en el ámbito de la salud mental y la investigación conductual.

PubMed

Barrios, Liliana Mondragón

2012-01-01

El propósito de este trabajo es presentar el impacto y la integración que los conocimientos adquiridos en el Programa Internacional de Formación en Ética de la Investigación Biomédica y Psicosocial de la Universidad de Chile han tenido en mi experiencia profesional, en el ámbito de la investigación psicosocial en un Instituto de Salud de México. Para este objetivo, expondré tres áreas en las cuales se ha podido evidenciar tal impacto: trabajo en los comités de ética, desarrollo de programas de académicos en bioética e investigación y publicación sobre ética y bioética. El motivo que me llevó a incursionar en el Programa fue que su enseñanza vincula la investigación psicosocial con la ética y la bioética, lo cual me permitió dirigir este tipo de reflexión hacia problemas como violencia, suicidio, adicciones, depresión y salud mental, y a nuevos campos como los estudios comunitarios, con poblaciones en riesgo o vulnerables, en los cuales las diversas implicaciones son difíciles de indagar.

Experiencias sobre el impacto del Programa de Formación en Ética de la Investigación Biomédica y Psicosocial en el ámbito de la salud mental y la investigación conductual

PubMed Central

Barrios, Liliana Mondragón

2012-01-01

El propósito de este trabajo es presentar el impacto y la integración que los conocimientos adquiridos en el Programa Internacional de Formación en Ética de la Investigación Biomédica y Psicosocial de la Universidad de Chile han tenido en mi experiencia profesional, en el ámbito de la investigación psicosocial en un Instituto de Salud de México. Para este objetivo, expondré tres áreas en las cuales se ha podido evidenciar tal impacto: trabajo en los comités de ética, desarrollo de programas de académicos en bioética e investigación y publicación sobre ética y bioética. El motivo que me llevó a incursionar en el Programa fue que su enseñanza vincula la investigación psicosocial con la ética y la bioética, lo cual me permitió dirigir este tipo de reflexión hacia problemas como violencia, suicidio, adicciones, depresión y salud mental, y a nuevos campos como los estudios comunitarios, con poblaciones en riesgo o vulnerables, en los cuales las diversas implicaciones son difíciles de indagar. PMID:22754085

Biblioteca Virtual de Salud Enfermería Regional: Trayectoria de Construcción, Fuentes de Información, Estrategias y Próximos Pasos.

PubMed Central

Lana, Francisco C. F.; Malvárez, Silvina

2012-01-01

Resumen La BVS Enfermeria constituye un nuevo paradigma en enfermería una vez que o modelo representa una expansión de la cooperación técnica y ha como objetivos centrales promover la ampliación del acceso la información sobre enfermería la través del acceso universal equitativo y construir un patrimonio informacional en enfermería, ayudando la mejorar la formación y práctica de enfermería a actuar con compromiso ético-social en el área de educación, investigación y atención a la salud. Como resultado del proceso de sensibilización, verifica-se la construcción de Bibliotecas Virtuales de Enfermería en varios países (Brasil, Argentina, Bolívia y Uruguay). La expectativa es que las BVS’s nacionais convergen a un gran portal que se está construyendo en una colaboración con BIREME/OPS/OMS, de la Asesoría Regional de Enfermería de la OPS-Washington y de Ministerio de Salud del Brasil, así como instituciones líderes en la producción del conocimiento en enfermería Iberoamérica. PMID:24199093

Diagnóstico diferencial en la encefalitis por anticuerpos contra el receptor NMDA

PubMed Central

González-Valcárcel, J.; Rosenfeld, M.R.; Dalmau, J.

2011-01-01

Resumen Introducción La encefalitis por anticuerpos contra el receptor de NMDA (NMDAR) suele desarrollarse como un síndrome característico de evolución multifásica y diagnóstico diferencial amplio. Pacientes Presentamos a 2 pacientes diagnosticadas de encefalitis por anticuerpos NMDAR con un cuadro clínico típico, pero que inicialmente señaló otras etiologías. Discusión La afectación frecuente de pacientes jóvenes con manifestaciones psiquiátricas prominentes indica frecuentemente otras consideraciones diagnósticas; las más frecuentes son las encefalitis virales, los procesos psiquiátricos y el síndrome neuroléptico maligno. Varios síndromes previamente definidos de manera parcial o descriptiva en adultos y pacientes pediátricos probablemente eran casos de encefalitis anti-NMDAR. Conclusiones La encefalitis anti-NMDAR debe considerarse en pacientes jóvenes con manifestaciones psiquiátricas subagudas, movimientos anormales y alteraciones autonómicas. La caracterización clínica e inmunológica de esta enfermedad ha llevado a la identificación de nuevos anticuerpos que afectan a procesos de memoria, aprendizaje, conducta y psicosis. PMID:20964986

Propriedades físicas de condensações densas no Escorpião

NASA Astrophysics Data System (ADS)

Vilas-Boas, J. W. S.; Barbosa, P. R., Jr.; Hickel, G. R.

2003-08-01

O conhecimento das propriedade físicas das condensações das nuvens escuras e sua relação com a dinâmica das núvens é um dos caminhos para o entendimento dos mecanismos de formação de estrelas de massas pequenas. Nesse trabalho, 8 condensações da nuvem escura do Escorpião foram observadas através de transições das moléculas de 13CO, C18O e NH3, utilizando-se os radiotelescopios de 15 m do SEST e 64 m de PARKES. Embora localizadas na superfície de uma bolha com velocidade de expansão entre 12 km/s e 15 km/s (Vilas-Boas et al), as linhas de monóxido de carbono apresentaram características típicas daquelas observadas em nuvens escuras. Em apenas uma condensação, contendo um objeto Pre-Sequência Principal (PMS), foi detectada emissão da molécula de amônia. A comparação direta entre as propriedades dessas condensações densas (núcleos) e aquelas identificadas na Musca, que se caracteriza por ser uma núvem de baixa atividade de formação estelar, mostra que elas têm propriedades idênticas e que as eficiências de formação estelar nos núcleos de ambas as nuvens são similares.

Perda de massa em ventos empoeirados de estrelas supergigantes

NASA Astrophysics Data System (ADS)

Vidotto, A. A.; Jatenco-Pereira, V.

2003-08-01

Em praticamente todas as regiões do diagrama HR, as estrelas apresentam evidências observacionais de perda de massa. Na literatura, pode-se encontrar trabalhos que tratam tanto do diagnóstico da perda de massa como da construção de modelos que visam explicá-la. O amortecimento de ondas Alfvén tem sido utilizado como mecanismo de aceleração de ventos homogêneos. Entretanto, sabe-se que os envelopes de estrelas frias contêm grãos sólidos e moléculas. Com o intuito de estudar a interação entre as ondas Alfvén e a poeira e a sua conseqüência na aceleração do vento estelar, Falceta-Gonçalves & Jatenco-Pereira (2002) desenvolveram um modelo de perda de massa para estrelas supergigantes. Neste trabalho, apresentamos um estudo do modelo acima proposto para avaliar a dependência da taxa de perda de massa com alguns parâmetros iniciais como, por exemplo, a densidade r0, o campo magnético B0, o comprimento de amortecimento da onda L0, seu fluxo f0, entre outros. Sendo assim, aumentando f0 de 10% a partir de valores de referência, vimos que aumenta consideravelmente, enquanto que um aumento de mesmo valor em r0, B0 e L0 acarreta uma diminuição em .

Toward Advanced Nursing Practice along with People-Centered Care Partnership Model for Sustainable Universal Health Coverage and Universal Access to Health.

PubMed

Kamei, Tomoko; Takahashi, Keiko; Omori, Junko; Arimori, Naoko; Hishinuma, Michiko; Asahara, Kiyomi; Shimpuku, Yoko; Ohashi, Kumiko; Tashiro, Junko

2017-01-30

. o cuidado centrado nas pessoas começa quando os membros da comunidade e os profissionais de saúde colocam em primeiro plano as questões sociais entre os membros da comunidade e das famílias. Esse modelo aborda essas questões, a criação de novos valores relativos à saúde e forma um sistema social que melhora a qualidade de vida e dá apoio social para sustentar o sistema de saúde universal por meio da construção de parcerias com as comunidades. um modelo de parceria CCP aborda os desafios das mudanças sociais que afetam a saúde geral e o novo papel das enfermeiras de prática avançada em sustentar a UHC. este estudio desarrolló un modelo de alianza para el cuidado centrado en las personas (CCP) para una sociedad envejecida, que haga frente a los retos de los cambios sociales que afectan a la salud de las personas y el nuevo papel de las enfermeras de práctica avanzada para apoyar la cobertura universal de salud. un modelo de alianza para el cuidado centrado en las personas fue desarrollado sobre la base de la meta-síntesis cualitativa de la literatura y la evaluación de 14 proyectos relacionados. Los proyectos en curso dieron lugar a la transformación individual y social mejorando la "alfabetización sanitaria" de la comunidad y los comportamientos, utilizando los cuidados centrados en las personas y aumentando la colaboración entre los profesionales sanitarios y miembros de la comunidad a través de las enfermeras de práctica avanzada. el cuidado centrado en las personas comienza cuando los miembros de la comunidad y los profesionales sanitarios ponen en primer plano a la salud y las cuestiones sociales entre los miembros de la comunidad y las familias. Este modelo aborda estas cuestiones, creando nuevos valores relativos a la salud y formando un sistema social que mejora la calidad de vida y el apoyo social para hacer sostenible la atención sanitaria universal a través del proceso de construcción de alianzas con las comunidades. un modelo

A preliminary RCT of CBT-AD for adherence and depression among HIV-positive Latinos on the U.S.-Mexico border: the Nuevo Día study.

PubMed

Simoni, Jane M; Wiebe, John S; Sauceda, John A; Huh, David; Sanchez, Giselle; Longoria, Virginia; Andres Bedoya, C; Safren, Steven A

2013-10-01

We conducted a preliminary RCT among 40 HIV-positive Latinos of Mexican descent on the U.S.-Mexico border who indicated imperfect adherence and depressive symptomatology. Participants were randomly assigned to culturally adapted cognitive-behavioral therapy for adherence and depression with an alarmed pillbox or usual care. Outcomes were depressive symptoms (self-report and blind clinician ratings), adherence (self-report and electronic pillbox), and biological markers. The intervention, delivered in English and Spanish, proved feasible and acceptable. Generalized estimating equations in intent-to-treat analyses showed some effects of "moderate" to "large" size, with maintenance over time. For example, intervention (vs. control) participants demonstrated at post-intervention a greater drop in BDI scores (OR = -3.64, p = 0.05) and greater adherence according to the electronic pillbox (OR = 3.78, p = 0.03). Biological markers indicated some relative improvement for CD4 count but not VL. The promising results suggest a larger trial to determine efficacy is warranted.

[Prevalence of reactions secundary to mosquito bites Aedes aegypti at en el Regional Center of Allergy and Clinical Immunology, University Hospital, de Monterrey, Nuevo Leon].

PubMed

González Diaz, Sandra Nora; Cruz, Alfredo Arias; Sedó Mejía, Giovanni A; Rojas Lozano, Antonio A; Valenzuela, Enrique Avitia; Vidaurri Ojeda, Alma C

2010-01-01

although systemic reactions resulting from hymenoptera stings have been studied extensively, the prevalence of allergic reactions to mosquitoes is unknown. to investigate the prevalence of allergic reactions to Aedes aegypti bites in patients seeking treatment at the Allergy and Clinical Immunology Regional Center of Jose E Gonzalez University Hospital in Monterrey, Mexico. we carried out a cross-sectional, descriptive study that included patients receiving skin tests for aeroallergens; skin sensitivity to mosquito bites was also tested. A questionnaire was used to obtain information about previous allergic reactions to mosquito bites. a total of 482 patients between 2 and 60 years of age were included; 53% were female, 407 (84.4%) had a history of local reactions to mosquito bites. Twelve patients (2.4%) stated a history of large local reaction; three (0.6%) of them with a positive skin prick test, one (0.2%) of those had systemic reaction history to mosquito. Eighty five (17.6%) patients had a positive mosquito skin test and 307 (63.6%) had a positive skin test for at least one aeroallergen. Seventy-eight (91.7%) of the 85 patients with a positive mosquito skin test had a history of local skin reactions to mosquito bite (odds ratio: 2.303 [confidence interval (CI) 1.037-5.10]. There was no statistically significance association between allergic diseases and mosquito allergy. adverse reactions and allergic reactions to mosquito bites occur frequently. However mosquito allergy is low. Further studies are required to determine the prevalence of mosquito allergy in the general population.

La distribución de objetos en el Cinturón de Kuiper y la posible existencia de un nuevo planeta en el Sistema Solar

NASA Astrophysics Data System (ADS)

Brunini, A.

A pesar de que la capacidad observacional no lo limita, no se han descubierto objetos en el Cinturón de Kuiper más allá de las 50 AU. Recientemente, hemos propuesto que un embrión planetario originalmente formado en la región de Urano-Neptuno, y posteriormente migrado hacia distancias mayores a 50-60 AU, puede explicar este hecho. Presentamos simulaciones numéricas de acreción del Sistema Solar exterior que muestran cómo, naturalmente, podriamos esperar que un planeta de este tipo se encuentre actualmente en regiones distantes del sistema solar. Analizamos además la posibilidad de detectarlo con instrumentos actuales.

PREFACE: 21st Latin American Symposium on Solid State Physics (SLAFES XXI)

NASA Astrophysics Data System (ADS)

Aguiar, J. Albino

2014-04-01

The Latin American Symposium on Solid State Physics (SLAFES) started in Caracas-Venezuela, and over time the symposia have taken place in 9 different Latin American countries. The last five events took place in Mérida-Venezuela (2002), Havana-Cuba (2004), Puebla-Mexico (2006), Puerto Iguazú-Argentina (2008) and Maragogi-Brazil (2011). During the last years, in the different SLAFES editions, the aim has been to bring together researches from Latina America and invite renowned scientists from around the world to a unique forum to discuss the latest developments regarding Solid state Physics. The 21st Latin American Symposium on Solid State Physics (SLAFES XXI) was held in Villa de Leyva-Colombia, from September 30 to October 04, 2013. The 21st SLAFES version featured the participation of experts in various areas of Solid State Physics from countries such as Belgium, Germany, United States, Spain, Ireland, Chile, Argentina and Brazil, had 270 submitted works and was attended by 140 researchers. The development of this event was made possible by financial support from the Universidad Pedagógica y Tecnológica de Colombia, Universidad Nacional de Colombia, Universidad del Norte-CO, Universidad de Magdalena-CO, Universidade Federal de Pernambuco-BR and the Academia Colombiana de Ciencias Exatas, Naturales y Física. Editors Professor J Albino Aguiar Departamento de Física Universidade Federal de Pernambuco 50670-901 Recife PE Brazil e-mail: albino@df.ufpe.br Professor Jairo Roa-Rojas Grupo de Física de Nuevos Materiales Departamento de Física Universidad Nacional de Colombia A.A. 5997 Bogotá DC, Colombia e-mail: jroar@unal.edu.co Professor Carlos Arturo Parra Vargas Grupo Física de Materiales Escuela de Física Universidad Padagógica y Tecnológica de Colombia Tunja Colombia e-mail: carlos.parra@uptc.edu.co Professor David A Land\\'i nez Téllez Grupo de Física de Nuevos Materiales Departamento de Física Universidad Nacional de Colombia A.A. 5997 Bogotá DC

Gestational Protein Restriction Increases Cardiac Connexin 43 mRNA levels in male adult rat offspring.

PubMed

Rossini, Kamila Fernanda; Oliveira, Camila Andrea de; Rebelato, Hércules Jonas; Esquisatto, Marcelo Augusto Marreto; Catisti, Rosana

2017-07-01

The dietary limitation during pregnancy influences the growth and development of the fetus and offspring and their health into adult life. The mechanisms underlying the adverse effects of gestational protein restriction (GPR) in the development of the offspring hearts are not well understood. The aim of this study was to evaluate the effects of GPR on cardiac structure in male rat offspring at day 60 after birth (d60). Pregnant Wistar rats were fed a normal-protein (NP, 17% casein) or low-protein (LP, 6% casein) diet. Blood pressure (BP) values from 60-day-old male offspring were measured by an indirect tail-cuff method using an electro sphygmomanometer. Hearts (d60) were collected for assessment of connexin 43 (Cx43) mRNA expression and morphological and morphometric analysis. LP offspring showed no difference in body weight, although they were born lighter than NP offspring. BP levels were significantly higher in the LP group. We observed a significant increase in the area occupied by collagen fibers, a decrease in the number of cardiomyocytes by 104 µm2, and an increase in cardiomyocyte area associated with an increased Cx43 expression. GPR changes myocardial levels of Cx43 mRNA in male young adult rats, suggesting that this mechanism aims to compensate the fibrotic process by the accumulation of collagen fibers in the heart interstitium. A limitação dietética durante a gravidez influencia o crescimento e desenvolvimento do feto e da prole e sua saúde na vida adulta. Os mecanismos subjacentes dos efeitos adversos da restrição proteica gestacional (RPG) no desenvolvimento dos corações da prole não são bem compreendidos. Avaliar os efeitos da RPG sobre a estrutura cardíaca em filhotes machos de ratas aos 60 dias após o nascimento (d60). Ratos fêmeas Wistar grávidas foram alimentadas com uma dieta de proteína normal (PN, 17% caseína) ou de baixa proteína (BP, caseína 6%). Os valores de pressão arterial (PA) de descendentes do sexo masculino de

Nuevo enfoque de la ensenanza de las matematicas en el nivel de primaria (A New Approach to the Teaching of Mathematics at the Primary School Level).

ERIC Educational Resources Information Center

Jimenez Lozano, Blanca; And Others

This document is an English-language abstract (approximately 1500 words) of a new approach to the teaching of mathematics in Mexican elementary schools. Three aspects of mathematical reform are discussed: (1) syllabus content; (2) teaching methods; and (3) the question of introducing the pupil to modern mathematics at the earliest possible stage…

A Preliminary RCT of CBT-AD for Adherence and Depression among HIV-Positive Latinos on the U.S. –Mexico Border: The Nuevo Día Study

PubMed Central

Simoni, Jane M.; Wiebe, John S.; Sauceda, John A.; Huh, David; Sanchez, Giselle; Longoria, Virginia; Bedoya, C. Andres; Safren, Steven A.

2013-01-01

We conducted a preliminary RCT among 40 HIV-positive Latinos of Mexican descent on the U.S.-Mexico border who indicated imperfect adherence and depressive symptomatology. Participants were randomly assigned to culturally adapted cognitive-behavioral therapy for adherence and depression (CBT-AD) with an alarmed pillbox or usual care. Outcomes were depressive symptoms (self-report and blind clinician ratings), adherence (self-report and electronic pillbox), and biological markers. The intervention, delivered in English and Spanish, proved feasible and acceptable. Generalized estimating equations in intent-to-treat analyses showed some effects of “moderate” to “large” size, with maintenance over time. For example, intervention (vs. control) participants demonstrated at post-intervention a greater drop in BDI scores (OR = - 3.64, p = .05) and greater adherence according to the electronic pillbox (OR = 3.78, p = .03). Biological markers indicated some relative improvement for CD4 count but not VL. The promising results suggest a larger trial to determine efficacy is warranted. PMID:23812892

Social and clinical predictors of drug-resistant tuberculosis in a public hospital, Monterrey, Mexico.

PubMed

Young, Bonnie N; Burgos, Marcos; Handal, Alexis J; Baker, Jack; Rendón, Adrian; Rosas-Taraco, Adrian; Long, Jeffrey; Hunley, Keith

2014-10-01

Drug-resistant tuberculosis (DRTB) is steadily increasing in Mexico, but little is known of patient risk factors in the Mexico-United States border region. This preliminary case-control study included 95 patients with active pulmonary TB with drug susceptibility results attending the José E. González University Hospital in the urban hub of Nuevo León-the Monterrey Metropolitan Area. We report potential social and clinical risk factors of DRTB among this hospital-based sample. We collected data through face-to-face interviews and medical record reviews from 25 cases with DRTB and 70 drug-sensitive controls. DNA was collected to assess an effect of genetic ancestry on DRTB by using a panel of 291,917 genomic markers. We calculated crude and multivariate logistic regression. After adjusting for potential confounding factors, we found that prior TB treatment (odds ratio, 4.5; 95% confidence interval, 0.9-21.1) and use of crack cocaine (odds ratio, 4.6; 95% confidence interval, 1.1-18.7) were associated with DRTB. No other variables, including genetic ancestry and comorbidities, were predictive. Health care providers may benefit from recognizing predictors of DRTB in regions where routine drug susceptibility testing is limited. Prior TB treatment and illicit drug use, specifically crack cocaine, may be important risk factors for DRTB in this region. Copyright © 2014 Elsevier Inc. All rights reserved.

A review of the flea genus Phalacropsylla Rothschild, 1915 (Siphonaptera, Ctenophthalmidae, Neopsyllinae, Phalacropsyllini) with new host and distributional records

PubMed Central

Acosta, Roxana; Hastriter, Michael W.

2017-01-01

Abstract A redescription of the genus Phalacropsylla Rothschild is provided. Six species are recognized: Phalacropsylla allos Wagner, P. hamata Tipton and Mendez, P. morlani Eads and Campos, P. nivalis Barrera and Traub, P. oregonensis Lewis and Maser, and P. paradisea Rothschild. Phalacropsylla hamata is designated herein as a junior synonym of P. paradisea. The distribution of P. paradisea is more extensive than previously thought, extending from Arizona through southern Colorado, into New Mexico, Texas, and northern Mexico (State of Nuevo León). It is the least host-specific of all species of Phalacropsylla, occurring on 13 different host species including cricetid, heteromyid, murid, and sciurid rodents and several carnivores, although it most commonly occurs on Neotoma albigula Hartley. The range of P. oregonensis is expanded from eastern Oregon to southeastern Idaho. Numerous records are documented for the most common and ubiquitous species, P. allos, which is found in British Columbia, central to northern California, Idaho, Montana, Colorado, Nevada, Utah, Wyoming, Arizona, and New Mexico. Neotoma cinerea Ord is the principal host of P. allos. Phalacropsylla allos is a winter flea west of the Rocky Mountains, but it has been reported in warmer months of the year on the eastern slopes of the Rocky Mountains in Larimer County, Colorado. A distribution map and key are provided for all species in the genus Phalacropsylla. PMID:28769677

[Participatory education and the development of critical reading in teachers theoretical texts. Multicenter study].

PubMed

Leyva-González, Félix Arturo; Leo-Amador, Guillermo Enrique; Viniegra-Velázquez, Leonardo; Degollado-Bardales, Lilia; Zavala-Arenas, Jesús Arturo; González-Cobos, Roberto Palemón; Valencia-Sánchez, Jesús Salvador; Leyva-Salas, César Arturo; Angulo-Bernal, Sonia Elizabeth; Gómez-Arteaga, Gress Marissell

2010-01-01

Determine what the relationship between participation in classroom of students attending courses at the Educational Research and Teacher Education (CIEFD's) and the development of proficiency in critical reading of theoretical texts in education. Intervention study, multicenter students (medical specialist) level Diploma in teaching methodology (DMDN) 1 and 2 (n=46 n=29) of the six CIEFD's (DF Siglo XXI, Mexico City La Raza, Nuevo Leon, Sonora, Puebla and Veracruz), period: March to August 2007 and a Masters in education (n=9, generation 2007-2008). Two instruments were constructed that evaluated the participation variables and critical reading of theoretical texts in education, conceptual validity; content and reliability were assessed by experts in education research. The educational intervention was in the form of seminars (three times a week in DMDN 1 and twice weekly in DMDN 2 and Masters). Participation was assessed halfway through the course and on completion, critical reading at the beginning as well as the end. Statistically significant associations were observed in DMDN 1 (four Centers) and the Masters, but not DMDN 2. In this investigation some of the theoretical proposals of the participatory education were recreated, starting from the analysis of our results. In some centers and in the masters, strengthening participation in this educational intervention is related to the development of critical reading of theoretical texts in education.

[Cost at the first level of care].

PubMed

Villarreal-Ríos, E; Montalvo-Almaguer, G; Salinas-Martínez, M; Guzmán-Padilla, J E; Tovar-Castillo, N H; Garza-Elizondo, M E

1996-01-01

To estimate the unit cost of 15 causes of demand for primary care per health clinic in an institutional (social security) health care system, and to determine the average cost at the state level. The cost of 80% of clinic visits was estimated in 35 of 40 clinics in the social security health care system in the state of Nuevo Leon, Mexico. The methodology for fixed costs consisted of: departmentalization, inputs, cost, weights and construction of matrices. Variable costs were estimated for standard patients by type of health care sought and with the consensus of experts; the sum of fixed and variable costs gave the unit cost. A computerized model was employed for data processing. A large variation in unit cost was observed between health clinics studied for all causes of demand, in both metropolitan and non-metropolitan areas. Prenatal care ($92.26) and diarrhea ($93.76) were the least expensive while diabetes ($240.42) and hypertension ($312.54) were the most expensive. Non-metropolitan costs were higher than metropolitan costs (p < 0.05); controlling for number of physician's offices showed that this was determined by medical units with only one physician's office. Knowledge of unit costs is a tool that, when used by medical administrators, allows adequate health care planning and efficient allocation of health resources.

[Active management of labor with cesarean index 6.4% and very good materno-fetal outcome].

PubMed

Crespo Ruiz, Eliodoro; Rodríguez Fernández, Jesús Javier

2002-11-01

The objective of this study is to reduce the incidence of cesarean section and to evaluate the impact on fetal-maternal morbidity and mortality by strictly following the guidelines of the National Health Office (Secretaria de Salud) at the Hospital of Gynecology and Obstetrics of Garza Garcia in Nuevo Leon, Mexico. A prospective and observational study was made. All the patients who culminated their pregnancy on Saturdays and Sundays between 7:00 and 19:00 hrs, in the period June 2000 to June 2001, were included in this study. The incidence of Cesarean sections and its impact on maternal-fetal morbidity and mortality were observed. A total of 798 patients were included in the study. The total number of newborns was 801. The age average was of 23.4 years (14 years-40 years). Of the 798 patients, 280 (35.1%) presented dystocia at vaginal delivery, 467 patients (58.5%) had an eutocic vaginal delivery and 51 patients (6.4%) went through a Caesarean section. The Apgar scores were: 8 at the first minute and 9 at the fifth minute for 681 neonates (85.01%); and 7/9 for 53 (6.6%). According to the results obtained in the present study we can conclude that the incidence of Cesarean section can be reduced by strictly following the guidelines of the National Health Office without affecting the maternal-fetal morbidity and mortality.

Predictability of dune activity in real dune fields under unidirectional wind regimes

NASA Astrophysics Data System (ADS)

Barchyn, Thomas E.; Hugenholtz, Chris H.

2015-02-01

We present an analysis of 10 dune fields to test a model-derived hypothesis of dune field activity. The hypothesis suggests that a quantifiable threshold exists for stabilization in unidirectional wind regimes: active dunes have slipface deposition rates that exceed the vegetation deposition tolerance, and stabilizing dunes have the opposite. We quantified aeolian sand flux, slipface geometry, and vegetation deposition tolerance to directly test the hypothesis at four dune fields (Bigstick, White Sands Stable, White Sands Active, and Cape Cod). We indirectly tested the hypothesis at six additional dune fields with limited vegetation data (Hanford, Año Nuevo, Skagen Odde, Salton Sea, Oceano Stable, and Oceano Active, "inverse calculation sites"). We used digital topographic data and estimates of aeolian sand flux to approximate the slipface deposition rates prior to stabilization. Results revealed a distinct, quantifiable, and consistent pattern despite diverse environmental conditions: the modal peak of prestabilization slipface deposition rates was 80% of the vegetation deposition tolerance at stabilized or stabilizing dune fields. Results from inverse calculation sites indicate deposition rates at stabilized sites were near a hypothesized maximum vegetation deposition tolerance (1 m a-1), and active sites had slipface deposition rates much higher. Overall, these results confirm the hypothesis and provide evidence of a globally applicable, simple, and previously unidentified predictor for the dynamics of vegetation cover in dune fields under unidirectional wind regimes.

PCR Assays for Identification of Coccidioides posadasii Based on the Nucleotide Sequence of the Antigen 2/Proline-Rich Antigen

PubMed Central

Bialek, Ralf; Kern, Jan; Herrmann, Tanja; Tijerina, Rolando; Ceceñas, Luis; Reischl, Udo; González, Gloria M.

2004-01-01

A conventional nested PCR and a real-time LightCycler PCR assay for detection of Coccidioides posadasii DNA were designed and tested in 120 clinical strains. These had been isolated from 114 patients within 10 years in Monterrey, Nuevo Leon, Mexico, known to be endemic for coccidioidomycosis. The gene encoding the specific antigen 2/proline-rich antigen (Ag2/PRA) was used as a target. All strains were correctly identified, whereas DNA from related members of the family Onygenaceae remained negative. Melting curve analysis by LightCycler and sequencing of the 526-bp product of the first PCR demonstrated either 100% identity to the GenBank sequence of the Silveira strain, now known to be C. posadasii (accession number AF013256), or a single silent mutation at position 1228. Length determination of two microsatellite-containing loci (GAC and 621) identified all 120 isolates as C. posadasii. Specific DNA was amplified by conventional nested PCR from three microscopically spherule-positive paraffin-embedded tissue samples, whereas 20 human tissue samples positive for other dimorphic fungi remained negative. Additionally, the safety of each step of a modified commercially available DNA extraction procedure was evaluated by using 10 strains. At least three steps of the protocol were demonstrated to sufficiently kill arthroconidia. This safe procedure is applicable to cultures and to clinical specimens. PMID:14766853

Science For Decision-Makers: Climate Change Indicators For The North-Central California Coast And Ocean

NASA Astrophysics Data System (ADS)

Duncan, B.; Higgason, K.; Suchanek, T.; Stachowicz, J.; Largier, J. L.; Cayan, D. R.

2013-12-01

Resource managers and decision-makers in North-central California recognize a need for increased information about the impacts of climate change on the region's coast and ocean to ensure that adaptation and conservation decisions are grounded in sound science. To help meet this need, ocean climate indicators were developed in a project based at NOAA's Gulf of the Farallones National Marine Sanctuary for the North-central California coast and ocean, from Año Nuevo to Point Arena, including the Pacific coastline of the San Francisco Bay Area. These represent the first regional ocean climate indicators in the National Marine Sanctuary System. The indicators were developed in collaboration with over 50 regional research scientists and resource managers representing federal and state agencies, research universities and institutions, and non-governmental organizations. Following the indicator development process, an interdisciplinary working group incorporated the indicators into a regional indicators monitoring inventory and plan that will be used by scientists, natural resource managers, and state and municipal planners to monitor, track, and develop adaptation strategies for the impacts of climate change on the region. The working group collaborated extensively to co-identify key measurements and data sources for the indicators, and to ensure that the monitoring plan was accessible and convenient for decision-makers while still providing a valuable resource for research scientists.

Culturally Specific Youth Substance Abuse Resistance Skills: Applicability across the U.S.-Mexico Border

PubMed Central

Marsiglia, Flavio F.; Kulis, Stephen; Rodriguez, Gregorio Martinez; Becerra, David; Castillo, Jason

2009-01-01

This study tests the applicability among adolescents in Mexico of the keepin' it REAL (refuse, explain, avoid, and leave) strategies that are common and effective ways that U.S. youth resist substance use. Following a social learning, communication competence and ecological theory integrated approach, the study draws on self-reported questionnaire data from a non-probability sample of 327 adolescents attending two public high schools in Monterrey, Nuevo León. Multivariate regressions were used to test whether the respondents' use of the REAL strategies by the participants could be predicted by key demographic variables. Separate models were estimated for the frequency of use of each strategy and for different substances. Findings indicate that most adolescents in this sample utilized each of the REAL strategies as well as other strategies to respond to offers of alcohol, cigarettes, or marijuana. Mexican and U.S. youth residing close to the US border appear to use similar drug resistance strategies. Use of the strategies varied considerably by the level of exposure to offers, but only minimally by gender and age. There were no notable differences by socioeconomic status or academic performance. Implications for prevention science, social work practice and social work research are discussed in the context of the bi-national border region and the applicability and prospect for dissemination of U.S. evidence based youth substance use prevention interventions. PMID:19924268

Culturally Specific Youth Substance Abuse Resistance Skills: Applicability across the U.S.-Mexico Border.

PubMed

Marsiglia, Flavio F; Kulis, Stephen; Rodriguez, Gregorio Martinez; Becerra, David; Castillo, Jason

2009-03-01

This study tests the applicability among adolescents in Mexico of the keepin' it REAL (refuse, explain, avoid, and leave) strategies that are common and effective ways that U.S. youth resist substance use. Following a social learning, communication competence and ecological theory integrated approach, the study draws on self-reported questionnaire data from a non-probability sample of 327 adolescents attending two public high schools in Monterrey, Nuevo León. Multivariate regressions were used to test whether the respondents' use of the REAL strategies by the participants could be predicted by key demographic variables. Separate models were estimated for the frequency of use of each strategy and for different substances. Findings indicate that most adolescents in this sample utilized each of the REAL strategies as well as other strategies to respond to offers of alcohol, cigarettes, or marijuana. Mexican and U.S. youth residing close to the US border appear to use similar drug resistance strategies. Use of the strategies varied considerably by the level of exposure to offers, but only minimally by gender and age. There were no notable differences by socioeconomic status or academic performance. Implications for prevention science, social work practice and social work research are discussed in the context of the bi-national border region and the applicability and prospect for dissemination of U.S. evidence based youth substance use prevention interventions.

A review of the flea genus Phalacropsylla Rothschild, 1915 (Siphonaptera, Ctenophthalmidae, Neopsyllinae, Phalacropsyllini) with new host and distributional records.

PubMed

Acosta, Roxana; Hastriter, Michael W

2017-01-01

A redescription of the genus Phalacropsylla Rothschild is provided. Six species are recognized: Phalacropsylla allos Wagner, P. hamata Tipton and Mendez, P. morlani Eads and Campos, P. nivalis Barrera and Traub, P. oregonensis Lewis and Maser, and P. paradisea Rothschild. Phalacropsylla hamata is designated herein as a junior synonym of P. paradisea . The distribution of P. paradisea is more extensive than previously thought, extending from Arizona through southern Colorado, into New Mexico, Texas, and northern Mexico (State of Nuevo León). It is the least host-specific of all species of Phalacropsylla , occurring on 13 different host species including cricetid, heteromyid, murid, and sciurid rodents and several carnivores, although it most commonly occurs on Neotoma albigula Hartley. The range of P. oregonensis is expanded from eastern Oregon to southeastern Idaho. Numerous records are documented for the most common and ubiquitous species, P. allos , which is found in British Columbia, central to northern California, Idaho, Montana, Colorado, Nevada, Utah, Wyoming, Arizona, and New Mexico. Neotoma cinerea Ord is the principal host of P. allos . Phalacropsylla allos is a winter flea west of the Rocky Mountains, but it has been reported in warmer months of the year on the eastern slopes of the Rocky Mountains in Larimer County, Colorado. A distribution map and key are provided for all species in the genus Phalacropsylla .

[Recommendations for selecting antimicrobial agents for in vitro susceptibility studies using automatic and semiautomatic systems].

PubMed

Cantón, Rafael; Alós, Juan Ignacio; Baquero, Fernando; Calvo, Jorge; Campos, José; Castillo, Javier; Cercenado, Emilia; Domínguez, M Angeles; Liñares, Josefina; López-Cerezo, Lorena; Marco, Francesc; Mirelis, Beatriz; Morosini, María-Isabel; Navarro, Ferran; Oliver, Antonio; Pérez-Trallero, Emilio; Torres, Carmen; Martínez-Martínez, Luis

2007-01-01

The number of clinical microbiology laboratories that have incorporated automatic susceptibility testing devices has increased in recent years. The majority of these systems determine MIC values using microdilution panels or specific cards, with grouping into clinical categories (susceptible, intermediate or resistant) and incorporate expert systems to infer resistance mechanisms. This document presents the recommendations of a group of experts designated by Grupo de Estudio de los Mecanismos de Acción y Resistencia a los Antimicrobianos (GEMARA, Study group on mechanisms of action and resistance to antimicrobial agents) and Mesa Española de Normalización de la Sensibilidad y Resistencia a los Antimicrobianos (MENSURA, Spanish Group for Normalizing Antimicrobial Susceptibility and Antimicrobial Resistance), with the aim of including antimicrobial agents and selecting concentrations for the susceptibility testing panels of automatic systems. The following have been defined: various antimicrobial categories (A: must be included in the study panel; B: inclusion is recommended; and C: inclusion is secondary, but may facilitate interpretative reading of the antibiogram) and groups (0: not used in therapeutics but may facilitate the detection of resistance mechanisms; 1: must be studied and always reported; 2: must be studied and selectively reported; 3: must be studied and reported at a second level; and 4: should be studied in urinary tract pathogens isolated in urine and other specimens). Recommended antimicrobial concentrations are adapted from the breakpoints established by EUCAST, CLSI and MENSURA. This approach will lead to more accurate susceptibility testing results with better detection of resistance mechanisms, and allowing to reach the clinical goal of the antibiogram.

PubMed

Oliver Bonet, Maria; Mach, Núria

2016-09-20

Introducción: la infertilidad es un problema global en aumento. Se estima que aproximadamente un 15% de las parejas en edad reproductiva tiene dificultades a la hora de concebir. De estas, alrededor de la mitad presentan uno o varios factores masculinos asociados a infertilidad o subfertilidad, aislados o en combinación con problemas de origen femenino. Durante la última década se ha empezado a estudiar la infertilidad desde una perspectiva multifactorial, considerando las interacciones y conexiones entre diferentes situaciones genéticas, epigenéticas, bioquímicas y fisiológicas del paciente.Objetivo: la presente revisión pretende describir mecanismos epigenéticos que pueden ser modulados mediante aspectos nutricionales y que están relacionados con la etiología de la infertilidad masculina y con la herencia transgeneracional de este fenotipo.Material y métodos: se ha realizado una extensa búsqueda de publicaciones científicas en las principales bases de datos electrónicas especializadas: NBCI, Elsevier, Scielo, Scirus y Science Direct.Resultados y conclusión: varios trabajos que muestran la importancia del estado nutricional en la fertilidad del hombre y, más específicamente, la capacidad de los componentes de la dieta para modificar los perfiles epigenéticos que no únicamente pueden afectar a su fertilidad, sino que también pueden ser transmitidos a la descendencia mediante lo que se ha denominado herencia transgeneracional, ocasionándoles problemas de salud diversos entre los que también se hallan problemas en la fertilidad.

Using environmental isotopes in the study of the recharge-discharge mechanisms of the Yarmouk catchment area in Jordan

NASA Astrophysics Data System (ADS)

Salameh, Elias

altitude sont enrichies (δO18 = -5, δD = -23) et les eaux de la vallée très enrichies (δO18 -3.8, δD = -18). Les aquifers profonds dans la vallée de la Jordanie sont appauvris (δO18 -18 = -6, δD = -30) et se confondent avec les eaux des zones situées en altitude. En appliquant uniquement les isotopes environnementaux comme des outils de compréhension des phénomènes hydrogéologiques, la source des différentes masses d'eau souterraines, les mécanismes de la recharge et de la décharge pourraient être expliqués de manière ambiguë. Las fuentes de recarga, los mecanismos de flujo y las áreas de descarga de los diferentes cuerpos de agua subterránea que subyacen el área de la cuenca del Río Yarmouk en Jordania, se han explicado de manera no ambigua únicamente mediante la aplicación de los isótopos como herramienta. A lo largo de la parte Jordana del área de la cuenca del Río Yarmouk el agua subterránea emerge de diferentes acuíferos con una variedad de tipos y composiciones, ya sea que provengan del mismo acuífero o de diferentes acuíferos. Los mecanismos convencionales de recarga/descarga, balances hídricos y variaciones químicas no han podido explicar las variaciones químicas y los diferentes tipos de aguas. La aplicación de herramientas de isótopos ambientales combinadas con los efectos de altitud derivados de variaciones topográficas (250 hasta 1,300 m s.n.m. en una distancia de 20 km) y tomando en consideración los efectos de re-evaporación en el empobrecimiento de isótopos y enriquecimiento del agua de lluvia han ayudado fuertemente en el entendimiento de los mecanismos de recarga/descarga de los diferentes acuíferos. La precipitación en el área varía de 600 mm/año, a lo largo de las tierras altas, a 350 mm/año en el área del Valle Jordán. El flujo de agua subterránea ocurre de las tierras altas hacia el Valle Jordán. El agua subterránea de las tierras altas está empobrecida en isótopos (δO18 = -6, δD = -30), el agua

Multiple (immiscible) melt phases of mafic composition in Chicxulub impact ejecta from northeastern Mexico: New constraints on target lithologies

NASA Astrophysics Data System (ADS)

Schulte, P.; Stinnesbeck, W.; Kontny, A.; Stüben, D.; Kramar, U.; Harting, M.

2002-12-01

Proximal ejecta deposits in sections from NE Mexico (Rancho Nuevo, La Sierrita, El Peñon, El Mimbral) have been investigated by backscattered electron imaging, wave-length dispersive electron microprobe analyses, and cathodoluminiscence, in order to characterize target lithologies, and ejecta mixing, fractionation, and distribution mechanisms. Additional investigations included magnetic properties (Kontny et al, this meeting) and trace element analyses (Harting et al, this meeting). Petrological features of these ejecta deposits are extraordinarily well preserved. They consist of mm-cm sized vesiculated spherical to drop-shaped spherules and angular to filamentous (ejecta-) fragments, as well as carbonate clasts, marl clasts, and rare benthic foraminifera floating in a carbonaceous matrix. Occasionally, spherules and fragments show welding-amalgamation features and enclose other components, thus resulting in a foam-like texture. An origin from the Chicxulub impact is suggested by geographical proximity and morphologically similarity to spherules found in other K-T sites in North to Central America and the Atlantic. The far distribution of such coarse-grained, foamy, and fragile ejecta-clasts as well as welding features suggest ignimbrite-like transport mechanisms or nearby secondary impacts. Several silicic ejecta phases have been observed that occur as distinct phases, even within one ejecta particle with textures indicative of liquid immiscibility: (1) Fe- (25-35 wt%), Mg- (10-15 wt%) rich phases with <25 wt% SiO2, altered to chlorite, (2) K- (5-8 wt.%) and Al- (25-30 wt%) rich hydrated glass with 45-50 wt% SiO2, and (3) rare SiO2- (>60 wt%) rich andesitic glasses. In addition to these silicic phases, abundant carbonate characterizes all studied ejecta deposits. It occurs within spherules and fragments and as clasts and globules, and shows textures indicative of either liquid immiscibility and/or quenching (`feathery calcite'). Quenched carbonates are enriched

Nuevo Amanecer: results of a randomized controlled trial of a community-based, peer-delivered stress management intervention to improve quality of life in Latinas with breast cancer.

PubMed

Nápoles, Anna María; Ortíz, Carmen; Santoyo-Olsson, Jasmine; Stewart, Anita L; Gregorich, Steven; Lee, Howard E; Durón, Ysabel; McGuire, Peggy; Luce, Judith

2015-07-01

We evaluated a community-based, translational stress management program to improve health-related quality of life in Spanish-speaking Latinas with breast cancer. We adapted a cognitive-behavioral stress management program integrating evidence-based and community best practices to address the needs of Latinas with breast cancer. Spanish-speaking Latinas with breast cancer were randomly assigned to an intervention or usual-care control group. Trained peers delivered the 8-week intervention between February 2011 and February 2014. Primary outcomes were breast cancer-specific quality of life and distress, and general symptoms of distress. Of 151 participants, 95% were retained at 6 months (between May 2011 and May 2014). Improvements in quality of life from baseline to 6 months were greater for the intervention than the control group on physical well-being, emotional well-being, breast cancer concerns, and overall quality of life. Decreases from baseline to 6 months were greater for the intervention group on depression and somatization. Results suggest that translation of evidence-based programs can reduce psychosocial health disparities in Latinas with breast cancer. Integration of this program into community-based organizations enhances its dissemination potential.

The Upper Campanian - lower Maastrichtian cephalopod fauna of Botellos, Nuevo León: a key to understand faunal turnover across the Campanian-Maastrichtian boundary in NE Mexico

NASA Astrophysics Data System (ADS)

Ifrim, Christina; De La Cerda, Jacobo Edgar Lara; Peña Ponce, Victor Hugo; Stinnesbeck, Wolfgang

2017-03-01

A new cephalopod collection from the Campanian-Maastrichtian boundary interval of NE Mexico, consisting of 1076 individuals assigned to 29 species and 22 genera is presented. This collection is a mix of ammonoids, one coleoid and one nautilid, which originate from at least three ammonoid biozones: The upper Campanian Exiteloceras jenneyi and Nostoceras (Nostoceras) hyatti zones, and the lower Maastrichtian Pachydiscus (Pachydiscus) neubergicus Zone. The age of the collection is thus middle late Campanian to late early Maastrichtian, and it closes a stratigraphic gap between faunas described formerly from this region. The specimens are nuclei collected from the desert pavement. The abundance of specimens allows for a comparison to other Campanian-Maastrichtian ammonoid records from Mexico, North America and Europe.

[Risk factors associated with trigger finger. Case-control study].

PubMed

De la Parra-Márquez, Miguel Leonardo; Tamez-Cavazos, Roberto; Zertuche-Cedillo, Luis; Martínez-Pérez, Juan José; Velasco-Rodríguez, Víctor; Cisneros-Pérez, Vicente

2008-01-01

We undertook this study to identify risk factors in our population associated with trigger finger. The study was conducted at the Instituto Mexicano del Seguro Social, UMAE 21, Monterrey, Nuevo Leon, Mexico. This was a case-control, retrospective, and observational study. There were 250 patients in each group. For cases, patients who were operated on for trigger finger from March 2006 to August 2006 were included. Controls included patients admitted to the Emergency Department with hand injuries that fulfilled the selection criteria. Risk factors analyzed were diabetes, hypertension, smoking, sex, age, weight, and 19 different occupations. Mean age of the cases was 52 years (SE +/- 14.19 years) with a median and mode of 53 years. The right hand was the most common with the middle, thumb, ring, index and little fingers, respectively. A significant statistical relationship was found: females (OR 7.57, 95% CI 5.07-11.31); diabetes (OR 3.72, 95% CI 2.43-5.70); obesity (OR 1.49, 95% CI 1.02-2.19). With regard to occupation, a statistical relationship was found: homemaker (OR 2.44, 95% CI 1.62-3.69); seamstress (OR 4.8, 95% CI 1.3-21.6); and secretary (OR 2.74, 95% CI 1.38-5.52). Trigger finger is a common pathology in our population and is more frequent in women >53 years old. It may be related to diabetes, body mass index (obesity) and certain occupations such as secretary, seamstress and homemaker.

How Do Management Fees Affect Retirement Wealth under Mexico's Personal Retirement Accounts System?

PubMed

Aguila, Emma; Hurd, Michael D; Rohwedder, Susann

2014-12-01

In 1997, Mexico transformed its pay-as-you-go social security system to a fully funded system with personal retirement accounts, including management fees. This article examines changes in retirement wealth resulting from this new system. It shows that management fees have drained a significant proportion of individuals' retirement wealth and have increased the number of persons claiming a government-subsidized minimum pension, particularly from the time the system was introduced in 1997 until adjustment to management fees in 2008. Since 2008, retirement wealth accumulation has been similar to that of the previous system. En 1997, México transformó su sistema de pensiones basado en cotizaciones individuales a uno de ahorro para el retiro que incluyen cuotas por la administración de las cuentas. El presente estudio examina los cambios en el monto de las pensiones como resultado de la introducción del nuevo sistema. Los resultados muestran que las cuotas de administración han drenado una proporción significativa del ahorro para el retiro de los individuos por lo que ha aumentado el número de personas que solicita la pensión mínima garantizada subsidiada por el gobierno desde que se introdujo el sistema en 1997 hasta que se hicieron ajustes en las cuotas de administración de los fondos de pensiones en 2008. A partir de 2008, la acumulación del ahorro para el retiro ha sido similar que la del sistema anterior.

TELEMEDICINA: UN DESAFÍO PARA AMÉRICA LATINA

PubMed Central

Litewka, Sergio

2011-01-01

La telemedicina es una tendencia creciente en la prestación de los servicios médicos. Aunque la eficacia de esta práctica no ha estado bien establecida, es probable que los países en desarrollo compartirán este nuevo paradigma con los desarrollados. Los defensores de la telemedicina en América Latina sostienen que será una herramienta útil para reducir las disparidades y mejorar la accesibilidad de atención de salud. Aunque América Latina quizá se convierta en un lugar para la investigación e investigación de estos procedimientos, no está claro cómo la telemedicina podría contribuir a mejorar la accesibilidad para las poblaciones desfavorecidas, o coexistir con sistemas de atención de salud públicos crónicamente enfermos. Telemedicine is a growing trend in the provision of medical services. Although the effectiveness of this practice has not been well established, it is likely that developing countries will share this new paradigm with developed ones. Supporters of telemedicine in Latin America maintain that it will be a useful tool for reducing disparities and improving health care accessibility. Although Latin America might become a place for research and investigation of these procedures, it is not clear how telemedicine could contribute to improving accessibility for disadvantaged populations, or coexist with chronically ill-funded public healthcare systems. PMID:21625326

The first educational interferometer in Mexico (FEYMANS): A novel project

NASA Astrophysics Data System (ADS)

Villicana Pedraza, Ilhuiyolitzin; Guesten, Rolf; Saucedo Morales, Julio Cesar; Carreto, Francisco; Valdes Estrada, Erik; Wendolyn Blanco Cardenas, Monica; Rodríguez Garza, Carolina B.; Pech Castillo, Gerardo A.; Ángel Vaquerizo, Juan

2016-07-01

An interferometer is composed of several radio telescopes (dishes) separated by a defined distance and used in synchrony. This kind of array produces a superior angular resolution, better than the resolution achieved by a single dish of the same combined area. In this work we propose the First Educational Youth Mexican Array North South, FEYMANS. It consists of an educational interferometer with initially four dishes. This array harvests Mexico's geography by locating each dish at the periphery of the country; creating new scientific links of provincial populations with the capital. The FEYMANS project focus in high school students and their projects on physics, chemistry and astronomy as a final project. Also, it can be used for bachelor theses. The initial and central dish-node is planed to be in Mexico City. After its construction, the efforts will focus to build subsequent nodes, on the Northwest region, Northeast, or Southeast. Region Northwest will give service to Baja California, Sonora and Chihuahua states. Region Northeast will cover Coahuila, Nuevo Leon and Tamaulipas. Finally, region Southeast will give access to Yucatan, Quintana Roo, Campeche, Tabasco and Chiapas. This project has been conceived by young professional astronomers and Mexican experts that will operate each node. Also, we have the technical support of the "Max Planck Institute fuer Radioastronomy in Bonn Germany" and the educational model of the "PARTNeR" project in Spain. This interferometer will be financed by Mexico's Federal Congress and by Mexico City's Legislative Assembly (ALDF).

Paleocene decapod Crustacea from northeastern Mexico: Additions to biostratigraphy and diversity

NASA Astrophysics Data System (ADS)

Martínez-Díaz, José Luis; Aguillón-Martínez, Martha Carolina; Luque, Javier; Vega, Francisco J.

2017-03-01

New decapod specimens from mid-Paleocene shallow marine deposits of NE Mexico represents an important addition to the diversity, paleobiogeography and evolution of the Crustacea record. In this work, we describe additions to the decapod assemblage from the Paleocene (Selandian) Rancho Nuevo Formation (Difunta Group, Parras Basin, Coahuila). Due to the evident size differences with other decapod assemblages, we compare the new assemblage with those from the Lower Paleocene (Danian) Mexia Clay Member of the Wills Point Formation, Texas, and the Lower Eocene (Ypresian) El Bosque Formation in Chiapas. Species reported from the mid-Paleocene (Selandian) assemblage of the Porters Creek Formation (Alabama), are correlatable to the decapod species from NE Mexico in age, size and systematic composition. The erymid lobster Enoploclytia gardnerae (Rathbun, 1935) is represented by several carapaces and chelae remains. One isolated palm of Callianassidae is included. Numerous carapaces of Linuparus wilcoxensis Rathbun, 1935 are described, representing the most abundant lobster. A new record for the raninid Notopoides sp., and presence of Quasilaeviranina sp. cf. arzignagnensis and Quasilaeviranina ovalis are here reported. New raninids, Claudioranina latacantha sp. nov. and Claudioranina sp. (Cyrtorhininae) are also part of this assemblage. Paraverrucoides alabamensis (Rathbun, 1935), and Tehuacana americana (Rathbun, 1935) are represented by several carapaces exhibiting intraspecific morphological variation. Different sizes among the Early and Middle Paleocene and Early Eocene decapod populations suggests a possible effect of variation in seawater temperatures and/or a Lilliput effect after the K/Pg event.

TELEMEDICINA: UN DESAFÍO PARA AMÉRICA LATINA.

PubMed

Litewka, Sergio

2005-01-01

La telemedicina es una tendencia creciente en la prestación de los servicios médicos. Aunque la eficacia de esta práctica no ha estado bien establecida, es probable que los países en desarrollo compartirán este nuevo paradigma con los desarrollados. Los defensores de la telemedicina en América Latina sostienen que será una herramienta útil para reducir las disparidades y mejorar la accesibilidad de atención de salud. Aunque América Latina quizá se convierta en un lugar para la investigación e investigación de estos procedimientos, no está claro cómo la telemedicina podría contribuir a mejorar la accesibilidad para las poblaciones desfavorecidas, o coexistir con sistemas de atención de salud públicos crónicamente enfermos.Telemedicine is a growing trend in the provision of medical services. Although the effectiveness of this practice has not been well established, it is likely that developing countries will share this new paradigm with developed ones. Supporters of telemedicine in Latin America maintain that it will be a useful tool for reducing disparities and improving health care accessibility. Although Latin America might become a place for research and investigation of these procedures, it is not clear how telemedicine could contribute to improving accessibility for disadvantaged populations, or coexist with chronically ill-funded public healthcare systems.

Genetic structure of Mexican Mestizos with type 2 diabetes mellitus based on three STR loci.

PubMed

Cerda-Flores, Ricardo M; Rivera-Prieto, Roxana A; Pereyra-Alférez, Benito; Calderón-Garcidueñas, Ana L; Barrera-Saldaña, Hugo A; Gallardo-Blanco, Hugo L; Ortiz-López, Rocío; Flores-Peña, Yolanda; Cárdenas-Villarreal, Velia M; Rivas, Fernando; Figueroa, Andrés; Kshatriya, Gautam

2013-08-01

The aims of this population genetics study were: 1) to ascertain whether Mexicans with type 2 diabetes mellitus (DM) were genetically homogeneous and 2) to compare the genetic structure of this selected population with the previously reported data of four random populations (Nuevo León, Hispanics, Chihuahua, and Central Region of Mexico). A sample of 103 unrelated individuals with DM and whose 4 grandparents were born in five zones of Mexico was interviewed in 32 Medical Units in the Mexican Institute of Social Security (IMSS). The non-coding STRs D16S539, D7S820, and D13S317 were analyzed. Genotype distribution was in agreement with Hardy-Weinberg expectations for all three markers. Allele frequencies were found to be similar between the selected population and the four random populations. Gene diversity analysis suggested that more than 99.57% of the total gene diversity could be attributed to variation between individuals within the population and 0.43% between the populations. According to the present and previous studies using molecular and non-molecular nuclear DNA markers not associated with any disease, the Mexican Mestizo population is found to be genetically homogeneous and therefore the genetic causes of DM are less heterogeneous, thereby simplifying genetic epidemiological studies as has been found in a previous study with the same design in Mexican women with breast cancer. Published by Elsevier B.V.

Notes about Alta Vista in Chalchihuites, Zacatecas

NASA Astrophysics Data System (ADS)

Montero García, Ismael Arturo

2016-11-01

The Tropic of Cancer is a parallel located at the latitude of 23°26'16''. This imaginary line extends across northern Mexico from the southernmost point of the Baja California Peninsula, to the Gulf of Mexico, passing through the states of Baja California Sur, Sinaloa, Durango, Zacatecas, San Luis Potosí, Nuevo León and Tamaulipas. The Tropic of Cancer marks the northernmost position of the sun at its midday zenith, which takes place in the Summer solstice. On this day, the sun's rays hit the earth's surface vertically along the entire length of this latitude, which was supposed to be significant for the priest/astronomers of ancient times, who dedicated themselves to observing the apparent movements of the sun. It so happens that Alta Vista in Zacatecas, corresponds to the westernmost peak where this phenomenon can occur, although the date of the zenith's course differs depending on the latitude of each position and so various archaeoastronomical specialists stress how the ancient indigenous cultures, at least those dating from Mexico's Classical period, valued this finding in developing their calendars. On the other hand, the research contributes new elements for discussion because it presents a calendar of the horizon, based on of the highest peaks of the Sierra Prieta mountain range ranging from the archaeological sites of El Chapín, Cerro Pedregoso, to the excavations at El Picacho Pelón (peak El Pelón).

[Intakes of energy and macronutrients in pregnant women in the northeast of Mexico].

PubMed

Tijerina Sáenz, Alexandra; Ramírez López, Erik; Meneses Valderrama, Víctor Manuel; Martínez Garza, Nancy Edith

2014-09-01

Descriptive and transversal study, first to report the dietary intake of energy and macronutrients in pregnant women in the northeast of Mexico. Convenience sample of 125 pregnant women (15-45 years of age) in the third trimester, who were prenatal patients in the Hospital Regional Materno Infantil, Nuevo León, Mexico. It was reported the level of studies, marital and professional status, weight, height and body mass index (BMI). Diet was evaluated by 24-hour food recalls, in 3 non-consecutive days. There were analyzed the intake of energy and the percentage contribution of calories from macronutrients according to the recommendations of intake of pregnant women. Intake of energy was 1683,8 Cal/day. The caloric contribution of saturated fat was higher than the recommendation in 53.6% of women. 76.8% of participants ate more than 55% of energy from carbohydrates, while 86.4% ate more sugars than the amount suggested. The median intake of protein was 12.0% of total energy intake. 75% of participants consumed less than 22,5 g of total dietary fiber. The relevance of knowing the intakes of energy and macronutrients in pregnant women may be due to the possible influence of diet over the child's appetite and maternal complications. Results of this study suggest the need to provide women with adequate nutritional recommendations since the first trimester of gestation, according to their nutritional status and social environment.

[Hepatitis C. Ways of transmission in a population of north of Tamaulipas].

PubMed

Neri Jiménez, Ulda; Boeta Guerrero, Marco Antonio

2006-01-01

Hepatitis C is a public health problem at a global level, with time it could degenerate cirrhosis or cancer of the liver. I Mexico it is known to be a great incidence and the risk factors or ways of exposure play an important role in the control of this disease. To determine the primary ways of transmission, like the influence of age and sex in the zero positives of the hepatitis C virus in a group of 95 patients who were zero positives were admitted to the Service of Gastroenterology of the General Hospital of Zone No. 11 of the Mexican Institute of Social Security in Nuevo Laredo, Tamaulipas. It included all the patients who tested positive for the antibody for Hepatitis C virus who attended the service of Gastroenterology, from January 2001 to December 2003. A direct interrogation was conducted to identify the mechanism of transmission associated with the infection of the Hepatitis C virus. Each patient had lab tests conducted to search for the antibody of the Hepatitis C virus, ELISA of the third generation (Enzymatic Inmunoanalysis) was conducted as well. Of the 95 patients, the principal mechanism of transmission that was found was promiscuous sex. Women were more affected with 57 cases (60%), and the age range was between 20-70 years of age. We found that promiscuous sex played a more important role in the contraction of the Hepatitis C virus than blood transfusions and its derivatives.

How Do Management Fees Affect Retirement Wealth under Mexico's Personal Retirement Accounts System?

PubMed Central

Aguila, Emma; Hurd, Michael D.; Rohwedder, Susann

2014-01-01

In 1997, Mexico transformed its pay-as-you-go social security system to a fully funded system with personal retirement accounts, including management fees. This article examines changes in retirement wealth resulting from this new system. It shows that management fees have drained a significant proportion of individuals' retirement wealth and have increased the number of persons claiming a government-subsidized minimum pension, particularly from the time the system was introduced in 1997 until adjustment to management fees in 2008. Since 2008, retirement wealth accumulation has been similar to that of the previous system. En 1997, México transformó su sistema de pensiones basado en cotizaciones individuales a uno de ahorro para el retiro que incluyen cuotas por la administración de las cuentas. El presente estudio examina los cambios en el monto de las pensiones como resultado de la introducción del nuevo sistema. Los resultados muestran que las cuotas de administración han drenado una proporción significativa del ahorro para el retiro de los individuos por lo que ha aumentado el número de personas que solicita la pensión mínima garantizada subsidiada por el gobierno desde que se introdujo el sistema en 1997 hasta que se hicieron ajustes en las cuotas de administración de los fondos de pensiones en 2008. A partir de 2008, la acumulación del ahorro para el retiro ha sido similar que la del sistema anterior. PMID:25601893

Whales from space: counting southern right whales by satellite.

PubMed

Fretwell, Peter T; Staniland, Iain J; Forcada, Jaume

2014-01-01

We describe a method of identifying and counting whales using very high resolution satellite imagery through the example of southern right whales breeding in part of the Golfo Nuevo, Península Valdés in Argentina. Southern right whales have been extensively hunted over the last 300 years and although numbers have recovered from near extinction in the early 20(th) century, current populations are fragmented and are estimated at only a small fraction of pre-hunting total. Recent extreme right whale calf mortality events at Península Valdés, which constitutes the largest single population, have raised fresh concern for the future of the species. The WorldView2 satellite has a maximum 50 cm resolution and a water penetrating coastal band in the far-blue part of the spectrum that allows it to see deeper into the water column. Using an image covering 113 km², we identified 55 probable whales and 23 other features that are possibly whales, with a further 13 objects that are only detected by the coastal band. Comparison of a number of classification techniques, to automatically detect whale-like objects, showed that a simple thresholding technique of the panchromatic and coastal band delivered the best results. This is the first successful study using satellite imagery to count whales; a pragmatic, transferable method using this rapidly advancing technology that has major implications for future surveys of cetacean populations.

Ecology of phlebotomine sandflies and putative reservoir hosts of leishmaniasis in a border area in Northeastern Mexico: implications for the risk of transmission of Leishmania mexicana in Mexico and the USA

PubMed Central

Rodríguez-Rojas, Jorge J.; Rodríguez-Moreno, Ángel; Berzunza-Cruz, Miriam; Gutiérrez-Granados, Gabriel; Becker, Ingeborg; Sánchez-Cordero, Victor; Stephens, Christopher R.; Fernández-Salas, Ildefonso; Rebollar-Téllez, Eduardo A.

2017-01-01

Leishmaniases are a group of important diseases transmitted to humans through the bite of sandfly vectors. Several forms of leishmaniases are endemic in Mexico and especially in the Southeast region. In the Northeastern region, however, there have only been isolated reports of cases and scanty records of sandfly vectors. The main objective of this study was to analyze the diversity of sandflies and potential reservoir hosts of Leishmania spp. in the states of Nuevo León and Tamaulipas. Species richness and abundances of sandflies and rodents were recorded. A fraction of the caught sandflies was analyzed by PCR to detect Leishmania spp. Tissues from captured rodents were also screened for infection. Ecological Niche Models (ENMs) were computed for species of rodent and their association with crop-growing areas. We found 13 species of sandflies, several of which are first records for this region. Medically important species such as Lutzomyia anthophora, Lutzomyia diabolica, Lutzomyia cruciata, and Lutzomyia shannoni were documented. Leishmania spp. infection was not detected in sandflies. Nine species of rodents were recorded, and Leishmania (Leishmania) mexicana infection was found in four species of Peromyscus and Sigmodon. ENMs showed that potential distribution of rodent pest species overlaps with allocated crop areas. This shows that Leishmania (L.) mexicana infection is present in the Northeastern region of Mexico, and that previously unrecorded sandfly species occur in the same areas. These findings suggest a potential risk of transmission of Leishmania (L.) mexicana. PMID:28825400

THE ROLE OF METABOLIC SURGERY FOR PATIENTS WITH OBESITY GRADE I ANDCLINICALLY UNCONTROLLED TYPE 2 DIABETES.

PubMed

Campos, Josemberg; Ramos, Almino; Szego, Thomaz; Zilberstein, Bruno; Feitosa, Heládio; Cohen, Ricardo

2016-07-07

Metabolic Risk Score defined by the surgical societies. Roux-en-Y gastric bypass (RYGB), because of its well known safety and efficacy and longer follow-up studies, is the main surgical technique indicated for patients eligible for surgery through the Metabolic Risk Score. The vertical sleeve gastrectomy may be considered if there is an absolute contraindication for the RYGB. T2DM patients should be evaluated by the multiprofessional team that will assess surgical eligibility, preoperative work up, follow up and long term monitoring for micro and macrovascular complications. Mesmo considerando o avanço do tratamento clínico ocorrido nos últimos 20 anos, com novos e mais eficientes medicamentos, os dados ainda são desanimadores quanto ao controle da obesidade e da diabete melito tipo 2(DMT2),com grande parcela de doentes em tratamento clínico ficando fora da meta desejada de controle. Apresentar proposta de Escore de Risco Metabólico para melhor orientar a indicação cirúrgica do diabete em pacientes com índice de massa corpórea (IMC) mais baixo nos quais o uso de procedimento cirúrgico para obesidade ainda é controverso. Foi realizada pesquisa nas bases de dados PubMed, Medline, PubMed Central, Scielo e Lilacs entre 2003-2015 correlacionando os descritores:cirurgia metabólica, obesidade e diabete melito tipo 2. Adicionalmente, representantes das sociedades envolvidas emitiram opiniões em pontos nos quais não existia na literatura trabalhos com graus de evidência elevados. Foram encontrados 45 artigos relacionadosque foram analisados pelos critérios da medicina baseada em evidências.As opiniões agrupadas procuraram responder as seguintes questões: Porque cirurgia metabólica e não bariátrica?;Mecanismos envolvidos no controle glicêmico; IMC como critério isolado de indicação cirúrgica para o DMT2 não controlado; Resultados de estudos de cirurgia metabólica em IMC<35 kg/m2; Segurança da cirurgia metabólica em pacientes com IMC<35 kg/m2; Efeitos

THE ROLE OF METABOLIC SURGERY FOR PATIENTS WITH OBESITY GRADE I AND TYPE 2 DIABETES NOT CONTROLLED CLINICALLY.

PubMed

Campos, Josemberg; Ramos, Almino; Szego, Thomaz; Zilberstein, Bruno; Feitosa, Heládio; Cohen, Ricardo

Metabolic Risk Score defined by the surgical societies. Roux-en-Y gastric bypass (RYGB), because of its well known safety and efficacy and longer follow-up studies, is the main surgical technique indicated for patients eligible for surgery through the Metabolic Risk Score. The vertical sleeve gastrectomy may be considered if there is an absolute contraindication for the RYGB. T2DM patients should be evaluated by the multiprofessional team that will assess surgical eligibility, preoperative work up, follow up and long term monitoring for micro and macrovascular complications. Mesmo considerando o avanço do tratamento clínico ocorrido nos últimos 20 anos, com novos e mais eficientes medicamentos, os dados ainda são desanimadores quanto ao controle da obesidade e da diabete melito tipo 2 (DMT2),com grande parcela de doentes em tratamento clínico ficando fora da meta desejada de controle. Apresentar proposta de Escore de Risco Metabólico para melhor orientar a indicação cirúrgica do diabete em pacientes com índice de massa corpórea (IMC) mais baixo nos quais o uso de procedimento cirúrgico para obesidade ainda é controverso. Foi realizada pesquisa nas bases de dados Pubmed, Medline, Pubmed Central, Scielo e Lilacs entre 2003-2015 correlacionando os descritores:cirurgia metabólica, obesidade e diabete melito tipo 2. Adicionalmente, representantes das sociedades envolvidas emitiram opiniões em pontos nos quais não existia na literatura trabalhos com graus de evidência elevados. Foram encontrados 45 artigos relacionados que foram analisados pelos critérios da medicina baseada em evidências. As opiniões agrupadas procuraram responder as seguintes questões: Porque cirurgia metabólica e não bariátrica?; Mecanismos envolvidos no controle glicêmico; IMC como critério isolado de indicação cirúrgica para o DMT2 não controlado; Resultados de estudos de cirurgia metabólica em IMC<35 kg/m2; Segurança da cirurgia metabólica em pacientes com IMC<35 kg/m2

Tumores neonatales y malformaciones congénitas

PubMed Central

Tornero, O. Berbel; García, J.A. Ortega; Tortajada, J. Ferrís i; Castell, J. García; Colomer, J. Donat i; Soldin, O.P.; Soler, J.L. Fuster

2013-01-01

Introducción La asociación entre tumores y malformaciones congénitas está bien establecida, pero no existen datos exclusivos en el período neonatal y se desconocen los mecanismos subyacentes que generan dicha relación. Objetivos Este trabajo tiene dos objetivos: primero, analizar la frecuencia de los tumores neonatales asociados a malformaciones congénitas, y segundo, comentar las posibles hipótesis etiopatogénicas de la relación entre ambas entidades. Materiales y método Estudio retrospectivo de las historias clínicas de los tumores neonatales, en el Hospital Universitario Materno- Infantil La Fe de Valencia, desde enero de 1990 hasta diciembre de 1999. Selección y descripción de las variedades histológicas asociadas a malformaciones congénitas. Éstas se han agrupado siguiendo los criterios de la Clasificación Internacional de Enfermedades CIE-9, códigos 740.0–759.9. Revisión sistemática bibliográfica de los últimos 25 años, obtenida del Medline, Cancerlit, Index Citation Science y Embase. El perfil de búsqueda utilizado fue la combinación de “neonatal/congenital-tumors/cancer/neoplasms” y “congenital malformations/birth defects”. Resultados Se identificaron 72 tumores neonatales (2,8 % del total de tumores pediátricos diagnosticados en dichos años) y 15 de ellos (20,8 %) asociados a malformaciones congénitas, enfermedades o síndromes congénitos. Las asociaciones entre tumores neonatales y malformaciones congénitas fueron las siguientes: a) angioma en 3 pacientes: con dos cardiopatías congénitas y una atresia de coanas-laringomalacia; b) neuroblastoma en 2 pacientes: uno con riñón en herradura y anomalías vertebrales, y otro con cardiopatía congénita; c) teratoma en 2 pacientes: uno con fisura palatina y anomalías vertebrales, y otro con metatarso varo; d) tumor del sistema nervioso central en un paciente con hernia de Bochdaleck; e) tumor cardíaco en 4 pacientes con esclerosis tuberosa; f) leucemia aguda en un

Reconstruction of Regional Environments in the Caribbean During the Neogene Using Gastropod Stable Isotope Profiles

NASA Astrophysics Data System (ADS)

Robbins, J. A.; Grossman, E. L.; O'Dea, A.; Tao, K.

2011-12-01

The closure of the Central American Isthmus (CAI) ca. 3.8-3.6 Ma triggered changes in nearshore environments in the Caribbean, causing changes in marine annual range of temperature (MART), carbonate deposition, and the benthic ecosystem. The associated extinction event began ca. 3-2 Ma, peaking between 2-1 Ma. More than two dozen "faunules", discreet packages of fauna which lived under similar environmental conditions, represent time just prior to, during, and after the uplift of the CAI. Multiple parameters including the amount and types of fauna present in each faunule have been used to estimate factors such as paleodepth, MART, extinction rates, and changes in ecological structure over time. Oxygen and carbon isotope analyses (δ18O and δ13C) of gastropod shells serially-sampled about the spire provide records of seasonal environmental conditions. In the tropics, gastropods that live under conditions of strong seasonal upwelling and freshwater input have a greater range of δ18O values in their profiles compared to those animals that live in non-upwelling waters with little freshwater input. Low δ13C values often represent the isotopically low terrestrial carbon found in river runoff, and may be coupled with low δ18O values during seasonal freshening of marine waters. Preliminary data from Strombus shells representing four faunules ranging in age from before the rise of the isthmus through its completion demonstrate the effectiveness of using these mollusks to study ancient tropical environments. Rio Limoncito (~3 Ma), which is believed to represent water depths of 20-40m based on foraminiferal assemblage, yielded the lowest δ18O values (-0.6±0.4%, representing the warmest temperatures/lowest salinities). The samples from Pueblo Nuevo (~1.6 Ma), with an estimated paleodepth between 50 and 100m, had an average value of 0.4±0.3% and therefore represent cooler waters/higher salinity. A shell from NE Escudo de Veraguas (~3.55 Ma) shows a shift from essentially

Nanoparticulas basadas en complejos de Fe(II) con transicion de espin: sintesis, caracterizacion y aplicaciones en electronica molecular

NASA Astrophysics Data System (ADS)

Monrabal Capilla, Maria

Esta tesis doctoral esta organizada en 5 capitulos y esta destinada al estudio de sistemas de Fe (II) que presentan el fenomeno de la transicion de espin a escala nanometrica. El capitulo 1 contiene una introduccion general sobre materiales moleculares multifuncionales, destacando aquellos ejemplos mas importantes. Por otro lado, se explicara el fenomeno de la transicion de espin, tratando aspectos conceptuales, los antecedentes mas importantes y la situacion actual. En el capitulo 2 se describen los diferentes procesos existentes para la obtencion de diferentes tipos de nanoparticulas. Ademas, se presenta la sintesis y caracterizacion de nanoparticulas del polimero de coordinacion unidimensional [Fe(Htrz)2(trz)]BF4, obtenidas mediante el metodo de micelas inversas. Estas nanoparticulas, con una estrecha distribucion de tamanos centrada alrededor de los 11 nm, presentan una transicion de espin muy abrupta, con un ancho ciclo de histeresis termica de unos 40K. En el capitulo 3 se describe el proceso de modificacion del tamano de las nanoparticulas descritas en el capitulo anterior, llevado a cabo variando la proporcion de surfactante/H2O en el medio. Ademas, con el objetivo de modificar las propiedades magneticas de las nanoparticulas obtenidas en el capitulo 2, se lleva a cabo la sintesis de nanoparticulas de polimeros de la misma familia del [Fe(Htrz)2(trz)]BF4. En concreto se sintetizaron 3 nuevos tipos de nanoparticulas basadas en el polimero [Fe(Htrz)1-x(NH2trz)x](ClO4)2, siendo x = 0.05, 0.15 y 0.3, en cada caso. Estas nanoparticulas siguen presentando una estrecha distribucion de tamanos y una transicion de espin muy abrupta y con un ancho ciclo de histeresis. Ademas, se observa que este ciclo se desplaza a temperaturas mas proximas a la temperatura ambiente a medida que se aumenta el porcentaje de 4-amino-1, 2, 4- triazol en la muestra. Pero al mismo tiempo se produce una disminucion de la anchura de este ciclo. Por ultimo, en este capitulo se presenta la

Nucleic-acid characterization of the identity and activity of subsurface microorganisms

NASA Astrophysics Data System (ADS)

Madsen, E. L.

pour obtenir des données, de nombreuses futures occasions sont dans l'attente d'explorations. Los métodos basados en ácidos nucleicos para la caracterización de microorganismos en sus propios hábitats han experimentado un gran auge en la última década. La extracción directa en muestras de los biomarcadores ácido desoxirribonucleico (ADN) y ribonucleico (ARN) supone un nuevo método para obtener información sobre ecología microbiana. En este articulo se definen: (1) el nuevo métidi para obtener información sobre ecología microbiana. En este artículo se definen: (1) el hábitat subsuperficial; (2) qué son los métodos basados en ácidos nucleicos; y (3) la información que estos métodos pueden proporcionar. Se revisa y tabula la bibliografía reciente sobre ácidos nucleicos microbianos en la subsuperficie. Hasta ahora la mayoría de estos estudios se han centrado en la identificación y filogenia de los microorganismos, mediante el análisis de sus genes 16S rRNA. Dado el potencial de las técnicas basadas en ácidos nucleicos y el hecho de que hasta ahora su aplicación a los hábitats subsuperficiales haya sido limitada, se presentan muchas opotunidades de futuro.

Relaciones entre el sueño y la adicción

PubMed Central

Cañellas, Francesca; de Lecea, Luis

2016-01-01

Resumen La interacción entre los trastornos del sueño y el abuso de sustancias es ya conocida, pero seguramente más compleja de lo que se pensaba. Existe tanto una relación positiva entre tener un trastorno por uso de substancias y sufrir un trastorno de sueño, como viceversa. Los efectos sobre el sueño dependen de la substancia utilizada, pero se ha demostrado que tanto durante su uso como en período de abstinencia los consumidores tienen diferentes problemas de sueño y fundamentalmente un sueño más fragmentado. Sabemos que hay que tener en cuenta los problemas de sueño para evitar recaídas en la adicción. Investigaciones recientes indican que el sistema hipocretinérgico definido por el neuropéptido hipocretina/orexina (Hcrt/ox), localizado en el hipotálamo lateral e implicado entre otros en la regulación del ciclo sueño-vigilia, jugaría un papel importante en las conductas adictivas. Diferentes estudios han demostrado interacciones entre el sistema hipocretinérgico, los circuitos de respuesta aguda al estrés y los sistemas de recompensa. También sabemos que la activación optogenética selectiva del sistema hipocretinérgico incrementa la probabilidad de la transición del sueño a la vigilia, y también es suficiente para iniciar un comportamiento compulsivo de recaída adictiva. La activación del sistema hipocretinérgico podría explicar la hipervigilia asociada al estrés y a la adicción. El mayor conocimiento de esta interacción permitiría entender mejor los mecanismos de la adicción y encontrar nuevas estrategias para el tratamiento de las adicciones. PMID:23241715

Estudo de não gaussianidade nas anisotropias da RCF medidas Wmap

NASA Astrophysics Data System (ADS)

Andrade, A. P. A.; Wuensche, C. A.; Ribeiro, A. L. B.

2003-08-01

A investigação do campo de flutuações da Radiação Cósmica de Fundo (RCF) pode oferecer um importante teste para os modelos cosmológicos que descrevem a origem e a evolução das flutuações primordiais. De um lado, apresenta-se o modelo inflacionário que prevê um espectro de flutuações adiabáticas distribuídas segundo uma gaussiana e, de outro, os modelos de defeitos topológicos (dentre outros) que descrevem um mecanismo para a geração de flutuações de isocurvatura que obedecem a uma distribuição não gaussiana. Este trabalho tem como objetivo caracterizar traços do modelo não gaussiano de campo misto (entre flutuações adiabáticas e de isocurvatura) nos mapas do Wilkinson Microwave Anisotropy Probe (WMAP). Simulações das anisotropias da RCF no contexto de mistura indicam traços marcantes na distribuição das flutuações de temperatura, mesmo quando consideradas pequenas contribuições do campo de isocurvatura (da ordem de 0.001). O efeito da mistura entre os campos resulta na transferência de potência de flutuações em escalas angulares intermediárias para flutuações em pequenas escalas angulares. Este efeito pode ser caracterizado pela relação entre as amplitudes dos primeiros picos acústicos no espectro de potência da RCF. Neste trabalho, investigamos a contribuição do campo de isocurvatura, no contexto de mistura, sobre as observações recentes da RCF realizadas pelo WMAP. As previsões do modelo de campo misto, uma vez confrontadas com as observações em pequenas escalas angulares, podem ajudar a revelar a natureza das flutuações primordiais.

Eventos de Desconexao na Cauda de Plasma do Cometa P/Halley

NASA Astrophysics Data System (ADS)

Voelzke, M. R.; Fahr, H. J.

2001-08-01

Observacoes cometárias e de vento solar sao comparadas com o propósito de determinar-se as condicoes do vento solar associadas aos eventos de desconexao (DEs) observados em caudas de plasma cometárias. Os dados cometários sao provenientes do The International Halley Watch Atlas of Large-Scale Phenomena. A análise visual sistemática das imagens do atlas revelou, entre outras estruturas morfológicas, 47 DEs ao longo da cauda de plasma do P/Halley. Estes 47 DEs registrados em 47 imagens distintas permitiram a descoberta de 19 origens de DEs, ou seja, o tempo em que as desconexoes iniciaram foi calculado. Os dados do vento solar sao provenientes de medidas feitas in situ pela sonda espacial IMP-8, as quais foram usadas para elaborar a variacao da velocidade do vento solar, densidade e pressao dinâmica durante o intervalo analisado. O presente trabalho compara as atuais teorias conflitantes, baseadas nos mecanismos de formacao, com o intuito de explicar o fenômeno cíclico dos DEs, ou seja, os efeitos de producao iônica, os efeitos de pressao e os efeitos de reconexao magnética sao analisados. Para cada uma das 19 origens de DEs comparou-se a densidade com a respectiva velocidade do vento solar com o intuito de determinar-se uma possível correlacao entre estas origens e os efeitos de pressao dinâmica. Quando da ocorrência de 6 origens de DEs o IMP-8 nao realizou medidas, nos outros 13 casos 10 origens (77%) mostraram uma anticorrelacao entre velocidade e densidade e apenas 3 (23%) revelaram uma tendência similar entre velocidade e densidade. Portanto, a análise inicial demonstra uma fraca correlacao entre as origens dos DEs e os efeitos de pressao.

Deep Coherent Vortices and Their Sea Surface Expressions

NASA Astrophysics Data System (ADS)

Ienna, Federico; Bashmachnikov, Igor; Dias, Joaquim; Peliz, Alvaro

2017-04-01

Mediterranean Water eddies, known as Meddies, are an important dynamic process occurring at depths of 1000-meters in the Northeast Atlantic Ocean. Meddies occur as a direct result of the Mediterranean Outflow exiting through the Gibraltar Strait, and represent a prevalent mechanism that can be found extensively throughout the ocean. Moreover, Meddy cores are known to produce measurable expressions at the sea surface in the form of rotating coherent vortices, not only affecting the sea surface from beneath, but also allowing for the possibility to remotely study these deep phenomena through data gathered at the sea surface. While many past studies have focused on the properties of Meddy cores, only a handful of studies focus on the physical characteristics and behavior of the surface expressions produced. Are Meddy surface expressions different from other like vortices that dominate the physical ocean surface? What are the relationships between deep and surface mechanisms, and do any feedbacks exist? To shed light on these questions, we investigate the relationship between Meddies and their sea-surface expressions through observations using in-situ float and drifter profiles and satellite altimetry. A total of 782 Meddy cores were examined in the Northeast Atlantic using temperature and salinity data obtained by CTD and Argo during the Mecanismos de transporte e de dispersão da Água Mediterrânica no Atlântico Nordeste (MEDTRANS) project, and their corresponding sea-level expressions were geo-temporally matched in satellite altimetry data. We report several statistical properties of the sea-surface expressions of Meddies, including their mean diameter and vertical magnitude, and compare the properties of their surface features to the underlying Meddy cores. We investigate how the deep core affects the surface, and whether surface expressions may in return yield information about the underlying cores. Additionally, we examine the variability of the surface

Enfermedad diarreica aguda por Escherichia coli patógenas en Colombia

PubMed Central

Gómez-Duarte, Oscar G.

2014-01-01

Resumen Las cepas de E. coli patógenas intestinales son causas importantes de la enfermedad diarreica aguda (EDA) en niños menores de 5 años en América Latina, África y Asia y están asociadas a alta mortalidad en niños en las comunidades más pobres de África y el Sudeste Asiático. Estudios sobre el papel de las E. coli patógenas intestinales en la EDA infantil en Colombia y otros países de América Latina son limitados debido a la carencia de ensayos para detección de estos patógenos en los laboratorios clínicos de centros de salud. Estudios recientes han reportado la detección de E. coli patógenas intestinales en Colombia, siendo la E. coli enterotoxigénica la cepa más frecuentemente asociada a diarrea en niños menores de 5 años. Otros patógenos detectados en estos pacientes incluyen las E. coli enteroagregativa, enteropatógena, productora de toxina Shiga, y de adherencia difusa. Con base en estudios que reportan la presencia de E. coli productora de toxina Shiga y E. coli enteroagregativa en carnes y vegetales en supermercados, se cree que productos alimentarios contaminados contribuyen a la transmisión de estos patógenos y a la infección del huésped susceptible. Más estudios son necesarios para evaluar los mecanismos de transmisión, el impacto en la epidemiologia de la EDA, y las pautas de manejo y prevención de estos patógenos que afectan la población pediátrica en Colombia. PMID:25491457

Physical Biologycal Interactions Controlling Larvae Dispersion: Application to Regions in the Neighbourhood of the Estuaries of North Portugal

NASA Astrophysics Data System (ADS)

Almeida, Martinho Marta

Um modelo numerico tridimensional oceânico foi usado para estudar a influencia das condicoes fisicas na dispersao e recrutamento de larvas com migracao vertical diaria (MVD) activa na plataforma continental noroeste de Portugal. As primeiras simulacoes foram forcadas por mares e verificou-se que a interaccao entre MVD e correntes de mare nao e importante para o transporte de larvas na plataforma continental oeste portuguesa. O trabalho realizado com forcamento de mares incrementou o presente conhecimento da dinâmica da mare na regiao. A analise da variacao vertical dos parâmetros das elipses de mare mostra uma separacao clara entre os harmonicos diurnos e semi-diurnos, e entre a circulacao oceânica quase barotropica e as correntes com dependencia vertical na plataforma. Desprezando a interaccao entre MVD e as mares o proximo passo foi a construcao e validacao dum modelo realistico forcado por fluxos atmosfera-oceano, capaz de reproduzir as correntes dominantes, geradas pelo vento, na plataforma continental. Na configuracao criada a MVD das larvas foi simulada com quatro cenarios de distribuicao e migracao vertical. Foram feitas duas simulacoes, uma para o final do Inverno e outra para a Primavera, abrangendo os meses de Fevereiro a Abril e Abril a Junho de 2002. Estes periodos foram escolhidos pois exibem diferentes regimes de vento, nao favoravel e favoravel ao afloramento costeiro. Os resultados mostram que as particulas com MVD sofreram maior retencao na plataforma continental interna durante condicoes de afloramento do que em qualquer outra combinacao de cenario de migracao e regime de vento. Na costa noroeste da Peninsula Iberica, que nao exibe irregularidades topograficas que poderiam criar areas de concentracao e retencao, a MVD pode constituir um mecanismo importante para evitar a dispersao de larvas em direccao ao mar aberto. None

Emergent and Reemergent Arboviruses in South America and the Caribbean: Why So Many and Why Now?

PubMed

Marcondes, Carlos Brisola; Contigiani, Marta; Gleiser, Raquel Miranda

2017-05-01

Varios arbovirus han emergido y/o reemergido en el Nuevo Mundo en las últimas décadas. Los virus Zika y chikungunya, anteriormente restringidos a África y quizás Asia, invadieron el continente, causando gran preocupación; además siguen ocurriendo brotes causados por el virus dengue en casi todos los países, con millones de casos por año. El virus West Nile invadió rápidamente América del Norte, y ya se han encontrado casos en América Central y del Sur. Otros arbovirus, como Mayaro y el virus de la encefalitis equina del este han aumentado su actividad y se han encontrado en nuevas regiones. Se han documentado cambios en la patogenicidad de algunos virus que conducen a enfermedades inesperadas. Una fauna diversa de mosquitos, cambios climáticos y en la vegetación, aumento de los viajes, y urbanizaciones no planificadas que generan condiciones adecuadas para la proliferación de Aedes aegypti (L.), Culex quinquefasciatus Say y otros mosquitos vectores, se han combinado para influir fuertemente en los cambios en la distribución y la incidencia de varios arbovirus. Se enfatiza la necesidad de realizar estudios exhaustivos de la fauna de mosquitos y modificaciones de las condiciones ambientales, sobre todo en las zonas urbanas fuertemente influenciadas por factores sociales, políticos y económicos. © The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com.

Bioaccumulation of hydroxylated polychlorinated biphenyls and pentachlorophenol in the serum of northern elephant seal pups (Mirounga angustirostris)

DOE Office of Scientific and Technical Information (OSTI.GOV)

Louis, Caroline, E-mail: caroline.louis@uclouvain.be; Covaci, Adrian; Stas, Marie

Northern elephant seals (NES) (Mirounga angustirostris) from the Año Nuevo State Reserve (CA, USA) were sampled at 1-, 4-, 7- and 10-week post-weaning. Concentrations of hydroxylated polychlorinated biphenyls (HO-PCBs) and their parent PCBs were measured in the serum of each individual. The ΣHO-PCB concentrations in the serum increased significantly between early and late fast (from 282±20 to 529±31 pg/mL). This increase might result from a mobilisation of HO-PCBs transferred from the mother during gestation and/or lactation and stored in the pup's liver. Food deprivation has been shown to exacerbate biotransformation capacities in mammals, birds and fish. The HO-penta-CBs was themore » predominant homologue group, followed by HO-hexa-CBs and HO-hepta-CBs. No preferential pathway for the metabolism of HO-PCBs (HO-direct insertion or NIH-shift of a chlorine atom) could be evidenced. The concentrations of pentachlorophenol (PCP) in the serum of weaned NES increased from 103±7 pg/mL at early fast to 246±41 pg/mL at late fast, which is within the range of PCP concentrations usually encountered in marine mammals. - Highlights: • Σ HO-PCB concentrations in serum significantly increased between early and late fast. • The HO-penta-CBs were the predominant homologue group measured in serum. • No preferential pathway for the metabolism of HO-PCBs could be evidenced. • PCP concentrations in serum significantly increased between early and late fast.« less

International Celestial Reference Frame (ICRF): mantenimiento y extensión

NASA Astrophysics Data System (ADS)

Ma, C.; Arias, E. F.; Eubanks, T.; Fey, A. L.; Gontier, A.-M.; Jacobs, C. S.; Sovers, O. J.; Archinal, B. A.; Charlot, P.

A partir de enero de 1998 el sistema de referencia celeste convencional está representado por el International Celestial Reference System (ICRS) y materializado a través de las coordenadas VLBI del conjunto de radiofuentes extragalácticas que conforman el International Celestial Reference Frame (ICRF). La primera realización del ICRF, fue elaborada en 1995 por un grupo de expertos designado por la IAU, la que encomendó al International Earth Rotation Service el mantenimiento del ICRS, del ICRF y del vínculo con marcos de referencia en otras frecuencias. Una primera extensión del ICRF se realizó entre abril y junio de 1999, con el objetivo primario de proveer posiciones de radiofuentes extragalácticas observadas a partir de julio de 1995 y de mejorar las posiciones de las fuentes ``candidatas" con la inclusión de observaciones adicionales. Objetivos secundarios fueron monitorear a las radiofuentes para verificar que siguen siendo adecuadas para realizar al ICRF y mejorar las técnicas de análisis de datos. Como resultado del nuevo análisis se obtuvo una solución a partir de la cual se construyó la primera extensión del ICRF, denominada ICRF - Ext.1. Ella representa al ICRS, sus fuentes de definición se mantienen con las mismas posiciones y errores que en la primera realización del ICRF; las demás radiofuentes tienen coordenadas mejor determinadas que en ICRF; el marco de referencia se densificó con el agregado de 59 nuevas radiofuentes.

Onboard acoustic recording from diving northern elephant seals.

PubMed

Fletcher, S; Le Boeuf, B J; Costa, D P; Tyack, P L; Blackwell, S B

1996-10-01

This study was the first phase in a long-term investigation of the importance of low-frequency sound in the aquatic life of northern elephant seals, Mirounga angustirostris. By attaching acoustic recording packages to the backs of six translocated juveniles, the aim was to determine the predominant frequencies and sound levels impinging on them, and whether they actively vocalize underwater on their return to their rookery at Ano Nuevo, California, from deep water in Monterey Bay. All packages contained a Sony digital audio tape recorder encased in an aluminum housing with an external hydrophone. Flow noise was minimized by potting the hydrophone in resin to the housing and orienting it posteriorly. The diving pattern of four seals was recorded with a separate time-depth recorder or a time-depth-velocity recorder. Good acoustic records were obtained from three seals. Flow noise was positively correlated with swim speed, but not so high as to mask most low-frequency sounds in the environment. Dominant frequencies of noise impinging on the seals were in the range 20-200 Hz. Transient signals recorded from the seals included snapping shrimp, cetacean vocalizations. boat noise, small explosive charges, and seal swim strokes, but no seal vocalizations were detected. During quiet intervals at the surface between dives, the acoustic record was dominated by respiration and signals that appeared to be heartbeats. This study demonstrates the feasibility of recording sounds from instruments attached to free-ranging seals, and in doing so, studying their behavioral and physiological response to fluctuations in ambient sounds.

Regiones de formación de estrellas masivas en las Nubes de Magallanes

NASA Astrophysics Data System (ADS)

Barbá, R.; Maíz Apellániz, J.; Rubio, M.; Walborn, N.

Las Nubes de Magallanes son un laboratorio formidable para el estudio de regiones de formación estelar. A diferencia de lo que sucede en el plano galáctico, ambas galaxias contienen poco polvo que nos afecte la visión directa de dichas regiones. Por otra parte, la menor metalicidad de las Nubes, nos permiten hacer un estudio comparativo de la formación estelar en ambientes de baja metalicidad. El presente trabajo da una revisión de los progresos notables que hemos alcanzado en el conocimiento del contenido estelar de algunas regiones de formación de estrellas masivas en ambas Nubes, en base a la utilización de imágenes del Telescopio Espacial Hubble, Gemini Sur, y Very Large Telescope, entre otros. En especial, nos concentramos en 30 Doradus y N11 en la Nube Mayor, y en NGC 346 en la Nube Menor. Nuevas imágenes de N11 obtenidas en los últimos meses con la Advanced Camera for Surveys del Hubble (óptico), y con Flamingos en Gemini Sur (infrarrojo), nos han permitido descubrir un nuevo `jet' con origen en una fuente infrarroja sumergida en un pilar polvoriento similar al objeto Herbig-Haro de M20 en nuestra galaxia. Este `jet' (junto a otros tres que hemos descubierto en 30 Doradus), es el cuarto ejemplo confirmado de `jet' asociado a una protoestrella fuera de nuestra galaxia. Además, presentamos el descubrimiento del primer objeto estelar joven masivo de la Nube Menor confirmado espectroscópicamente.

Espectroscopía Espacial en el IR-Lejano

NASA Astrophysics Data System (ADS)

Goicoechea, Javier R.; Cernicharo, J.

Debido a la opacidad atmosférica, el dominio IR--lejano del espectro electromagnético ha sido la última ventana en ser utilizada por la Astrofísica Molecular. El potencial que supone abrir este nuevo rango de frecuencias a través de la espectroscopía molecular ha comenzado a ser explotado con el Infrared Space Observatory (ISO). La sensibilidad de la instrumentación embarcada en dicho satélite no tiene comparación alguna con las escasas misiones espaciales, o a bordo de aviones, realizadas con anterioridad a su lanzamiento. En particular, casi todo el rango operativo de ISO en el IR--lejano no había sido explorado. El espectro IR--lejano de las fuentes más representativas de la galaxia era desconocido y los principales emisores de radiación, las moléculas, estaban por identificar. Las observaciones en el IR--lejano están especialmente indicadas para el estudio del gas caliente en las nubes moleculares del medio interestelar y en el interior de las envolturas circunestelares alrededor de estrellas evolucionadas. Algunas de estas fuentes; Sgr B2 en el Centro Galáctico y las Proto--Nebulosas Planetarias, constituyen uno de los objetos más paradigmáticos en nuestra comprensión de la complejidad química de La Galaxia. En esta contribución se presentan los resultados espectroscópicos más importantes de algunas de estas fuentes astronómicas.

Igneous petrology of the new ureilites Nova 001 and Nullarbor 010

NASA Technical Reports Server (NTRS)

Triman, Allan H.; Berkley, John L.

1994-01-01

The Nova 001 (= Nuevo Mercurio (b)) and Nullarbor 010 meteorites are ureilites, both of which contain euhedral graphite crystals. The bulk of the meteorites are olivine (Fo79) and pyroxenes (Wo9En73Fs18, Wo3En77Fs20), with a few percent graphite and minor amounts of troilite, Ni-Fe metal, and possibly diamond. The rims of olivine grains are reduced (to Fo91) and contain abundant blebs of Fe metal. Silicate mineral grains are equant, anhedral, up to 2 mm across, and lack obvious preferred orientations. Euhedral graphite crystals (to 1 mm x 0.3 mm) are present at silicate grain boundaries, along boundaries and protruding into the silicates, and entirely within silicate mineral grains. Graphite euhedra are also present as radiating clusters and groups of parallel plates grains embedded in olivine; no other ureilite has comparable graphite textures. Minute lumps within graphite grains are possible diamond, inferred to be a result of shock. Other shock effects are limited to undulatory extinction and fracturing. Both ureilites have been weathered significantly. Considering their similar mineralogies, identical mineral compositions, and identical unusual textures, Nova 001 and Nullarbor 010 are probably paired. Based on olivine compositions, Nova 001 and Nullarbor 010 are in Group 1 (FeO-rich) of Berkley et al. (1980). Silicate mineral compositions are consistent with those of others known ureilites. The presence of euhedral graphite crystals within the silicate minerals is consistent with an igneous origin, and suggests that large proportions of silicate magma were present locally and crystallized in situ.

Mexican Adolescents' Self-Reports of Parental Monitoring and Sexual Communication for Prevention of Sexual Risk Behavior.

PubMed

Dávila, Sandra Paloma Esparza; Champion, Jane Dimmitt; Monsiváis, Maria Guadalupe Moreno; Tovar, Marlene; Arias, Maria Luisa Flores

Assess perceptions of parental monitoring and sexual communication for sexual health promotion among adolescents who are Mexican. Adolescents (N=153, n=85 females, n=68 males) between 14years (n=80) and 15 years (n=73) were recruited at a public high school in Monterrey in the state of Nuevo Leon, Mexico. All participants were living with a parent(s). Descriptive statistical analyses were conducted to assess sociodemographic characteristics of the group. Chi-square analyses were conducted to identify potential group differences among the adolescents by age, gender and sexual activity regarding responses to each item of the Spanish Version Parental Monitoring and Sexual Communication Scale (a=0.88). Eleven percent of adolescents self-reported sexual activity. Significant group differences by age, gender and sexual activity were identified concerning parental monitoring and sexual communication including: less parental monitoring with older age (14 versus 15 year olds); more parental monitoring for females than males; less monitoring for sexually active adolescents; greater sexual communication for males than females, and among adolescents who were sexually active. An assessment of adolescents' perceptions of parental monitoring and sexual communication is useful for development of strategies concerning sexual health promotion in Mexico. The Spanish Version Parental Monitoring and Sexual Communication Scale can be used for assessment and modification of interventions for adolescent populations in Mexico. Information obtained from this assessment can be used to assist parents to enhance positive outcomes for parental monitoring and sexual communication with their children. Copyright © 2017 Elsevier Inc. All rights reserved.

Ocean climate indicators: A monitoring inventory and plan for tracking climate change in the north-central California coast and ocean region

USGS Publications Warehouse

Duncan, Benet; Higgason, Kelley; Suchanek, Tom; Largier, John; Stachowicz, Jay; Allen, Sarah; Bograd, Steven; Breen, R.; Gellerman, Holly; Hill, Tessa; Jahncke, Jaime; Johnson, Rebecca L.; Lonhart, Steve I.; Morgan, Steven; Wilkerson, Frances; Roletto, Jan

2013-01-01

The impacts of climate change, defined as increasing atmospheric and oceanic carbon dioxide and associated increases in average global temperature and oceanic acidity, have been observed both globally and on regional scales, such as in the North-central California coast and ocean, a region that extends from Point Arena to Point Año Nuevo and includes the Pacific coastline of the San Francisco Bay Area. Because of the high economic and ecological value of the region’s marine environment, the Gulf of the Farallones National Marine Sanctuary (GFNMS) and other agencies and organizations have recognized the need to evaluate and plan for climate change impacts. Climate change indicators can be developed on global, regional, and site-specific spatial scales, and they provide information about the presence and potential impacts of climate change. While indicators exist for the nation and for the state of California as a whole, no system of ocean climate indicators exist that specifically consider the unique characteristics of the California coast and ocean region. To that end, GFNMS collaborated with over 50 regional, federal, and state natural resource managers, research scientists, and other partners to develop a set of 2 ocean climate indicators specific to this region. A smaller working group of 13 regional partners developed monitoring goals, objectives, strategies, and activities for the indicators and recommended selected species for biological indicators, resulting in the Ocean Climate Indicators Monitoring Inventory and Plan. The working group considered current knowledge of ongoing monitoring, feasibility of monitoring, costs, and logistics in selecting monitoring activities and selected species.

The economic impact of Mexico City's smoke-free law.

PubMed

López, Carlos Manuel Guerrero; Ruiz, Jorge Alberto Jiménez; Shigematsu, Luz Myriam Reynales; Waters, Hugh R

2011-07-01

To evaluate the economic impact of Mexico City's 2008 smoke-free law--The Non-Smokers' Health Protection Law on restaurants, bars and nightclubs. We used the Monthly Services Survey of businesses from January 2005 to April 2009--with revenues, employment and payments to employees as the principal outcomes. The results are estimated using a differences-in-differences regression model with fixed effects. The states of Jalisco, Nuevo León and México, where the law was not in effect, serve as a counterfactual comparison group. In restaurants, after accounting for observable factors and the fixed effects, there was a 24.8% increase in restaurants' revenue associated with the smoke-free law. This difference is not statistically significant but shows that, on average, restaurants did not suffer economically as a result of the law. Total wages increased by 28.2% and employment increased by 16.2%. In nightclubs, bars and taverns there was a decrease of 1.5% in revenues and an increase of 0.1% and 3.0%, respectively, in wages and employment. None of these effects are statistically significant in multivariate analysis. There is no statistically significant evidence that the Mexico City smoke-free law had a negative impact on restaurants' income, employees' wages and levels of employment. On the contrary, the results show a positive, though statistically non-significant, impact of the law on most of these outcomes. Mexico City's experience suggests that smoke-free laws in Mexico and elsewhere will not hurt economic productivity in the restaurant and bar industries.

Pathogenic Landscape of Transboundary Zoonotic Diseases in the Mexico-US Border Along the Rio Grande.

PubMed

Esteve-Gassent, Maria Dolores; Pérez de León, Adalberto A; Romero-Salas, Dora; Feria-Arroyo, Teresa P; Patino, Ramiro; Castro-Arellano, Ivan; Gordillo-Pérez, Guadalupe; Auclair, Allan; Goolsby, John; Rodriguez-Vivas, Roger Ivan; Estrada-Franco, Jose Guillermo

2014-01-01

Transboundary zoonotic diseases, several of which are vector borne, can maintain a dynamic focus and have pathogens circulating in geographic regions encircling multiple geopolitical boundaries. Global change is intensifying transboundary problems, including the spatial variation of the risk and incidence of zoonotic diseases. The complexity of these challenges can be greater in areas where rivers delineate international boundaries and encompass transitions between ecozones. The Rio Grande serves as a natural border between the US State of Texas and the Mexican States of Chihuahua, Coahuila, Nuevo León, and Tamaulipas. Not only do millions of people live in this transboundary region, but also a substantial amount of goods and people pass through it everyday. Moreover, it occurs over a region that functions as a corridor for animal migrations, and thus links the Neotropic and Nearctic biogeographic zones, with the latter being a known foci of zoonotic diseases. However, the pathogenic landscape of important zoonotic diseases in the south Texas-Mexico transboundary region remains to be fully understood. An international perspective on the interplay between disease systems, ecosystem processes, land use, and human behaviors is applied here to analyze landscape and spatial features of Venezuelan equine encephalitis, Hantavirus disease, Lyme Borreliosis, Leptospirosis, Bartonellosis, Chagas disease, human Babesiosis, and Leishmaniasis. Surveillance systems following the One Health approach with a regional perspective will help identifying opportunities to mitigate the health burden of those diseases on human and animal populations. It is proposed that the Mexico-US border along the Rio Grande region be viewed as a continuum landscape where zoonotic pathogens circulate regardless of national borders.

The economic impact of Mexico City's smoke-free law

PubMed Central

Guerrero López, Carlos Manuel; Jiménez Ruiz, Jorge Alberto; Reynales Shigematsu, Luz Myriam

2011-01-01

Objective To evaluate the economic impact of Mexico City's 2008 smoke-free law—The Non-Smokers' Health Protection Law on restaurants, bars and nightclubs. Material and methods We used the Monthly Services Survey of businesses from January 2005 to April 2009—with revenues, employment and payments to employees as the principal outcomes. The results are estimated using a differences-in-differences regression model with fixed effects. The states of Jalisco, Nuevo León and México, where the law was not in effect, serve as a counterfactual comparison group. Results In restaurants, after accounting for observable factors and the fixed effects, there was a 24.8% increase in restaurants' revenue associated with the smoke-free law. This difference is not statistically significant but shows that, on average, restaurants did not suffer economically as a result of the law. Total wages increased by 28.2% and employment increased by 16.2%. In nightclubs, bars and taverns there was a decrease of 1.5% in revenues and an increase of 0.1% and 3.0%, respectively, in wages and employment. None of these effects are statistically significant in multivariate analysis. Conclusions There is no statistically significant evidence that the Mexico City smoke-free law had a negative impact on restaurants' income, employees' wages and levels of employment. On the contrary, the results show a positive, though statistically non-significant, impact of the law on most of these outcomes. Mexico City's experience suggests that smoke-free laws in Mexico and elsewhere will not hurt economic productivity in the restaurant and bar industries. PMID:21292808

Task-Based Language Learning: Old Approach, New Style. A New Lesson to Learn (Aprendizaje basado en tareas: un antiguo enfoque, un nuevo estilo. Una nueva lección para aprender)

ERIC Educational Resources Information Center

Rodríguez-Bonces, Mónica; Rodríguez-Bonces, Jeisson

2010-01-01

This paper provides an overview of Task-Based Language Learning (TBL) and its use in the teaching and learning of foreign languages. It begins by defining the concept of TBL, followed by a presentation of its framework and implications, and finally, a lesson plan based on TBL. The article presents an additional stage to be considered when planning…

Mating opportunities in Sangalopsis veliterna females: Costs and benefits

PubMed Central

Hernández Duran, Linda C.; Fajardo Medina, Gonzalo E.; Fuentes Quinter, Luz S.; Martin, Oliver

2014-01-01

apareamiento. En este estudio, el efecto de la disponibilidad continua de diferente número de machos (1, 2, 4, 8) sobre la frecuencia de apareamiento de las hembras y los componentes del potencial reproductivo (fitness) fueron estimados al comparar el número de espermatóforos hallados en la bursa copulatrix (un estimado del número de copulas, pero no del número de machos involucrados en estas copulas), la longevidad de las hembras, número de huevos colocados (fecundidad) y proporción de huevos fecundados (fertilidad) en la polilla Sangalopsis veliterna Druce (Lepidóptera: Geometridae). Los resultados indican que no existen diferencias en la fertilidad ni en la fecundidad; sin embargo la longevidad aumentó a medida que se las hembras presentaron más de una cópula y de igual manera en algunos casos la fecundidad aumentó con varios apareamientos. PMID:25205137

Dentistry and HIV/AIDS related stigma.

PubMed

Elizondo, Jesus Eduardo; Treviño, Ana Cecilia; Violant, Deborah

2015-01-01

To analyze HIV/AIDS positive individual's perception and attitudes regarding dental services. One hundred and thirty-four subjects (30.0% of women and 70.0% of men) from Nuevo León, Mexico, took part in the study (2014). They filled out structured, analytical, self-administered, anonymous questionnaires. Besides the sociodemographic variables, the perception regarding public and private dental services and related professionals was evaluated, as well as the perceived stigma associated with HIV/AIDS, through a Likert-type scale. The statistical evaluation included a factorial and a non-hierarchical cluster analysis. Social inequalities were found regarding the search for public and private dental professionals and services. Most subjects reported omitting their HIV serodiagnosis and agreed that dentists must be trained and qualified to treat patients with HIV/AIDS. The factorial analysis revealed two elements: experiences of stigma and discrimination in dental appointments and feelings of concern regarding the attitudes of professionals or their teams concerning patients' HIV serodiagnosis. The cluster analysis identified three groups: users who have not experienced stigma or discrimination (85.0%); the ones who have not had those experiences, but feel somewhat concerned (12.7%); and the ones who underwent stigma and discrimination and feel concerned (2.3%). We observed a low percentage of stigma and discrimination in dental appointments; however, most HIV/AIDS patients do not reveal their serodiagnosis to dentists out of fear of being rejected. Such fact implies a workplace hazard to dental professionals, but especially to the very own health of HIV/AIDS patients, as dentists will not be able to provide them a proper clinical and pharmaceutical treatment.

Using msa-2b as a molecular marker for genotyping Mexican isolates of Babesia bovis.

PubMed

Genis, Alma D; Perez, Jocelin; Mosqueda, Juan J; Alvarez, Antonio; Camacho, Minerva; Muñoz, Maria de Lourdes; Rojas, Carmen; Figueroa, Julio V

2009-12-01

Variable merozoite surface antigens of Babesia bovis are exposed glycoproteins having a role in erythrocyte invasion. Members of this gene family include msa-1 and msa-2 (msa-2c, msa-2a(1), msa-2a(2) and msa-2b). To determine the sequence variation among B. bovis Mexican isolates using msa-2b as a genetic marker, PCR amplicons corresponding to msa-2b were cloned and plasmids carrying the corresponding inserts were purified and sequenced. Comparative analysis of nucleotide and deduced amino acid sequences revealed distinct degrees of variability and identity among the coding gene sequences obtained from 16 geographically different Mexican B. bovis isolates and a reference strain. Clustal-W multiple alignments of the MSA-2b deduced amino acid sequences performed with the 17 B. bovis Mexican isolates, revealed the identification of three genotypes with a distinct set each of amino acid residues present at the variable region: Genotype I represented by the MO7 strain (in vitro culture-derived from the Mexico isolate) as well as RAD, Chiapas-1, Tabasco and Veracruz-3 isolates; Genotype II, represented by the Jalisco, Mexico and Veracruz-2 isolates; and Genotype III comprising the sequences from most of the isolates studied, Tamaulipas-1, Chiapas-2, Guerrero-1, Nayarit, Quintana Roo, Nuevo Leon, Tamaulipas-2, Yucatan and Guerrero-2. Moreover, these three genotypes could be discriminated against each other by using a PCR-RFLP approach. The results suggest that occurrence of indels within the variable region of msa-2b sequences can be useful markers for identifying a particular genotype present in field populations of B. bovis isolated from infected cattle in Mexico.

Comparisons of The Habitat Utilization Of Top Predators In The Southern Ocean And The North Pacific

NASA Astrophysics Data System (ADS)

Costa, D. P.; Robinson, P.; Huckstadt, L. E.; Crocker, D. E.; Goebel, M. E.

2010-12-01

Northern and Southern elephant seals (Mirounga angustirostris, M. leonina) separated some 4 MYA. While these congeners are physiologically very similar and thus have the potential to forage in similar ways they inhabit very different habitats. While southern elephant seals (SES) are distributed throughout the southern ocean, northern elephant seals (NES) are limited to the Northeast Pacific Ocean and range over lower latitudes than SES. In order to compare and contrast the physiological capability and response to different habitats we compared the foraging behavior of 167 adult female northern elephant seals (Año Nuevo and San Benitos Islands) and 55 southern elephant seals (Livingston Island, Antarctic Peninsula) using satellite telemetry and dive recorders. As expected both species carried out very similar dive depths (NES 509m ± 166 vs SES 345m±79) and dive durations (NES 23.0 min ± 6.7; SES 22.5 min ± 5.0). However, there were significant differences in their foraging pattern that we attribute to differences in the availability of continental shelf and suitable foraging habitat. While 85% of NES females foraged offshore, the dominant strategy for SES was benthic foraging on the continental shelf. Even with the differences in habitat, the fundamental components of their foraging patterns remained the same as when they foraged pelagically they both species relied on persistent large scale oceanographic features where mixing enhances productivity such as the North Pacific Transition zone (NES) and the Southern Antarctic Circumpolar Current Front (SES). Given the very different habitats and prey species consumed by these two species their overall foraging behavior is surprisingly similar suggesting that as a mesopelagic predator the elephant seal design is rather robust.

[Critical reading of reports of educational research in teachers of IMSS. Multicenter study].

PubMed

Leyva-González, Félix Arturo; Cacho-Salazar, Julio M; Degollado-Bardales, Lilia; Zavala-Arenas, Jesús Arturo; Angulo-Bernal, Sonia Elizabeth; Leyva-Salas, César Arturo; Orozco-Bisson, Gisele Victorine

2011-01-01

To determine the effect of an educational strategy promoting participation in the development of critical reading of educational research reports on professors of Educational Research and Teacher Education (CIEFD's). We performed an intervention study, multicenter professors (medical specialists) who enrolled in the courses: Diploma in teaching methodological level 1 and 2 (n = 46, n = 29, respectively) in the six CIEFD's (D.F. Siglo XXI, DF. La Raza, Nuevo León, Sonora, Puebla and Jalisco), in the period March to August 2007. A tool was built that assessed the variables critical appraisal of educational research reports, the construct validity, content and reliability was assessed by experts in education research. The educational strategy developed in the form of seminars, which were held three times a week in the Certification in teaching methodological level 1 and twice per week in the Certification Level 2 in teaching methodology duration per session: 6 h. The instrument was applied at the beginning and end of the course. In the two Graduates it was observed in the total group, an advance in the three indicators of critical reading, which was expressed with statistically significant differences; in the global score of the Diploma level 1 (final vs. initial measurement) the following mediums were observed: 36-67 (p = 0.0001); in the Diploma level 2, it was observed in its overall rating: 42-78 (p = 0.0001). This inquiry from the results observed some of theoretical approaches to mainstreaming participatory. An educational strategy promoting participation produced a breakthrough in the three indicators (to interpret, to judge and to formulate proposals) for critical reading of educational research reports.

[Use of alternative medicine in the treatment of allergic diseases].

PubMed

Félix Berumen, José Alfredo; González Díaz, Sandra Nora; Canseco González, Carlos; Arias Cruz, Alfredo

2004-01-01

The alternative medicine and the complementary medicine are forms of treatment very spread and frequently demanded by patients with allergic diseases. According to recent studies, homeopathy, acupuncture and herbal medicine are the most commonly used types of alternative medicine. To know the frequency in the use of different types of alternative medicine for the treatment of allergic diseases in patients attended at the Centro Regional de Alergia e Immunologia Clínica of the Hospital Universitario de Monterrey, Nuevo León. A transversal, descriptive and observational study was done by the use of questionnaires applied to patients and/or patients' relatives attended in this Center. This survey included questions to focus the investigation in the use of a Iternative medicine for the treatment of any allergic disease. The data analysis was done by descriptive statistics. Four hundred one questionnaires were applied. The average age of the patients was of 14 years (range from 1 to 73 years). Fourty-seven percent (189 patients) were female and 58.2% (212 patients) were male. The diagnoses included: allergic rhinitis in 215 patients (53.6), asthma in 97 (24.2%), rhinitis and asthma in 73 (18.2) and atopic dermatitis in 16 (4%). Out of the patients 34.4% (138) had used at least one type of alternative medicine for the treatment of their allergic disease. Homeopathy was the most commonly used type of alternative medicine (78.2%), followed by the natural medicine (31.5%). Alternative medicine for the treatment of allergic diseases is frequent in patients who attend to this center. Homeopathy and the natural medicine are the most used.

Pathogenic Landscape of Transboundary Zoonotic Diseases in the Mexico–US Border Along the Rio Grande

PubMed Central

Esteve-Gassent, Maria Dolores; Pérez de León, Adalberto A.; Romero-Salas, Dora; Feria-Arroyo, Teresa P.; Patino, Ramiro; Castro-Arellano, Ivan; Gordillo-Pérez, Guadalupe; Auclair, Allan; Goolsby, John; Rodriguez-Vivas, Roger Ivan; Estrada-Franco, Jose Guillermo

2014-01-01

Transboundary zoonotic diseases, several of which are vector borne, can maintain a dynamic focus and have pathogens circulating in geographic regions encircling multiple geopolitical boundaries. Global change is intensifying transboundary problems, including the spatial variation of the risk and incidence of zoonotic diseases. The complexity of these challenges can be greater in areas where rivers delineate international boundaries and encompass transitions between ecozones. The Rio Grande serves as a natural border between the US State of Texas and the Mexican States of Chihuahua, Coahuila, Nuevo León, and Tamaulipas. Not only do millions of people live in this transboundary region, but also a substantial amount of goods and people pass through it everyday. Moreover, it occurs over a region that functions as a corridor for animal migrations, and thus links the Neotropic and Nearctic biogeographic zones, with the latter being a known foci of zoonotic diseases. However, the pathogenic landscape of important zoonotic diseases in the south Texas–Mexico transboundary region remains to be fully understood. An international perspective on the interplay between disease systems, ecosystem processes, land use, and human behaviors is applied here to analyze landscape and spatial features of Venezuelan equine encephalitis, Hantavirus disease, Lyme Borreliosis, Leptospirosis, Bartonellosis, Chagas disease, human Babesiosis, and Leishmaniasis. Surveillance systems following the One Health approach with a regional perspective will help identifying opportunities to mitigate the health burden of those diseases on human and animal populations. It is proposed that the Mexico–US border along the Rio Grande region be viewed as a continuum landscape where zoonotic pathogens circulate regardless of national borders. PMID:25453027

Effects of Age, Colony, and Sex on Mercury Concentrations in California Sea Lions.

PubMed

McHuron, Elizabeth A; Peterson, Sarah H; Ackerman, Joshua T; Melin, Sharon R; Harris, Jeffrey D; Costa, Daniel P

2016-01-01

We measured total mercury (THg) concentrations in California sea lions (Zalophus californianus) and examined how concentrations varied with age class, colony, and sex. Because Hg exposure is primarily via diet, we used nitrogen (δ (15)N) and carbon (δ (13)C) stable isotopes to determine if intraspecific differences in THg concentrations could be explained by feeding ecology. Blood and hair were collected from 21 adult females and 57 juveniles from three colonies in central and southern California (San Nicolas, San Miguel, and Año Nuevo Islands). Total Hg concentrations ranged from 0.01 to 0.31 μg g(-1) wet weight (ww) in blood and 0.74 to 21.00 μg g(-1) dry weight (dw) in hair. Adult females had greater mean THg concentrations than juveniles in blood (0.15 vs. 0.03 μg(-1) ww) and hair (10.10 vs. 3.25 μg(-1) dw). Age class differences in THg concentrations did not appear to be driven by trophic level or habitat type because there were no differences in δ (15)N or δ (13)C values between adults and juveniles. Total Hg concentrations in adult females were 54 % (blood) and 24 % (hair) greater in females from San Miguel than females from San Nicolas Island, which may have been because sea lions from the two islands foraged in different areas. For juveniles, we detected some differences in THg concentrations with colony and sex, although these were likely due to sampling effects and not ecological differences. Overall, THg concentrations in California sea lions were within the range documented for other marine mammals and were generally below toxicity benchmarks for fish-eating wildlife.

DNA damage and cytotoxicity induced on common carp by pollutants in water from an urban reservoir. Madín reservoir, a case study.

PubMed

Pérez-Coyotl, I; Martínez-Vieyra, C; Galar-Martínez, M; Gómez-Oliván, L M; García-Medina, S; Islas-Flores, H; Pérez-Pasten Borja, R; Gasca-Pérez, E; Novoa-Luna, K A; Dublán-García, O

2017-10-01

Madín Reservoir provides a substantial amount of drinking water to two municipalities close to Mexico City metropolitan area. However, it receives untreated wastewater discharges from domestic sources in the towns of Nuevo Madín and others, as well as diverse pollutants which are hauled by the Río Tlalnepantla from its upper reaches, so that the xenobiotics in the reservoir are highly diverse in terms of type and quantity. Previous studies showed that MR is contaminated with xenobiotics such as Al, Hg and Fe, as well as NSAIDs, at concentrations exceeding the limits established for aquatic life protection. These pollutants have been shown to induce oxidative stress on Cyprinus carpio and may therefore also damage the genetic material of exposed organisms, eliciting cytotoxicity as well. The present study aimed to determine the genotoxicity and cytotoxicity induced on blood, liver and gill of C. carpio by the pollutants present in MR water. Specimens were exposed to water from five sampling sites and the following biomarkers were evaluated: DNA damage by comet assay, frequency of micronuclei, apoptosis by TUNEL assay and caspase-3 activity. Significant increases relative to the control group (P < 0.05) were found with all biomarkers in all tissues evaluated, with the level of damage differing between sampling sites. In conclusion, pollutants present in MR water are genotoxic and cytotoxic to C. carpio, and this sentinel species, coupled with the biomarkers evaluated herein, is a reliable tool for assessing the health risk to wildlife posed by exposure to pollutants in freshwater bodies. Copyright © 2017 Elsevier Ltd. All rights reserved.

Morulustatin, A Disintegrin that Inhibits ADP-Induced Platelet Aggregation, Isolated from the Mexican Tamaulipan Rock Rattlesnake (Crotalus lepidus morulus)

PubMed Central

Borja, Miguel; Galan, Jacob Anthony; Cantu, Esteban; Zugasti-Cruz, Alejandro; Rodríguez-Acosta, Alexis; Lazcano, David; Lucena, Sara; Suntravat, Montamas; Sánchez, y Elda Eliza

2016-01-01

The Tamaulipan rock rattlesnake (Crotalus lepidus morulus) is a montane snake that occurs in the humid pine-oak forest and the upper cloud forest of the Sierra Madre Oriental in southwestern Tamaulipas, central Nuevo Leon, and southeastern Coahuila in Mexico. Venom from this rattlesnake was fractionated by High-Performance Liquid Chromatography for the purpose of discovering disintegrin molecules. Disintegrins are non-enzymatic, small molecular weight peptides that interfere with cell-cell and cell-matrix interactions by binding to various cell receptors. Eleven fractions were collected by anion exchange chromatography and pooled into six groups (I, II, III, IV, V, and VI). Proteins of the six groups were analyzed by SDS-PAGE and western blot using antibodies raised against a disintegrin. The antibodies recognized different protein bands in five (II, III, IV, V, and VI) of six groups in a molecular mass range of 7 to 105 kDa. Western blot analysis revealed fewer protein bands in the higher molecular mass range and two bands in the disintegrin weight range in group II compared with the other four groups. Proteins in group II were further separated into nine fractions using reverse phase C18 chromatography. Fraction 4 inhibited platelet aggregation and was named morulustatin, which exhibited a single band with a molecular mass of approximately 7 kDa. Mass spectrometry analysis of fraction 4 revealed the identification of disintegrin peptides LRPGAQCADGLCCDQCR (MH+ 2035.84) and AGEECDCGSPANCCDAATCK (MH+ 2328.82). Morulustatin inhibited ADP-induced platelet aggregation in human whole blood and was concentration-dependent with an IC50 of 89.5 nM ± 12. PMID:28713196

Dentistry and HIV/AIDS related stigma

PubMed Central

Elizondo, Jesus Eduardo; Treviño, Ana Cecilia; Violant, Deborah

2015-01-01

OBJECTIVE To analyze HIV/AIDS positive individual’s perception and attitudes regarding dental services. METHODS One hundred and thirty-four subjects (30.0% of women and 70.0% of men) from Nuevo León, Mexico, took part in the study (2014). They filled out structured, analytical, self-administered, anonymous questionnaires. Besides the sociodemographic variables, the perception regarding public and private dental services and related professionals was evaluated, as well as the perceived stigma associated with HIV/AIDS, through a Likert-type scale. The statistical evaluation included a factorial and a non-hierarchical cluster analysis. RESULTS Social inequalities were found regarding the search for public and private dental professionals and services. Most subjects reported omitting their HIV serodiagnosis and agreed that dentists must be trained and qualified to treat patients with HIV/AIDS. The factorial analysis revealed two elements: experiences of stigma and discrimination in dental appointments and feelings of concern regarding the attitudes of professionals or their teams concerning patients’ HIV serodiagnosis. The cluster analysis identified three groups: users who have not experienced stigma or discrimination (85.0%); the ones who have not had those experiences, but feel somewhat concerned (12.7%); and the ones who underwent stigma and discrimination and feel concerned (2.3%). CONCLUSIONS We observed a low percentage of stigma and discrimination in dental appointments; however, most HIV/AIDS patients do not reveal their serodiagnosis to dentists out of fear of being rejected. Such fact implies a workplace hazard to dental professionals, but especially to the very own health of HIV/AIDS patients, as dentists will not be able to provide them a proper clinical and pharmaceutical treatment. PMID:26538100

Effect of recreational diving on Patagonian rocky reefs.

PubMed

Bravo, Gonzalo; Márquez, Federico; Marzinelli, Ezequiel M; Mendez, María M; Bigatti, Gregorio

2015-03-01

Tourism has grown considerably in the last decades, promoting activities such as recreational SCUBA diving that may affect marine benthic communities. In Puerto Madryn, Patagonia Argentina, sub-aquatic tourism areas (STA) receive about 7,000 divers per year. Diving is concentrated on a few small rocky reefs and 50% of the dives occur in summer. In this work, we evaluated the effect of recreational diving activities on benthic communities and determined whether diving causes a press (long-term) or a pulse (short-term) response. We quantified the percentage cover of benthic organisms and compared benthic assemblage structure and composition between two sites with contrasting usage by divers, 'highly disturbed' and 'moderately disturbed' sites, and two 'control' sites with similar physical characteristics but no diving activity, twice before and after the diving peak in summer. We found differences in benthic assemblage structure (identity and relative abundance of taxa) and composition (identity only) among diving sites and controls. These differences were consistent before and after the peak of diving in summer, suggesting that recreational diving may produce a press impact on overall benthic assemblage structure and composition in these STA. At the moderately disturbed site, however, covers of specific taxa, such as some key habitat-forming or highly abundant species, usually differed from those in controls only immediately after summer, after which they begun to resemble controls, suggesting a pulse impact. Thus, STA in Golfo Nuevo seem to respond differently to disturbances of diving depending on the usage of the sites. This information is necessary to develop sound management strategies in order to preserve local biodiversity. Copyright © 2014 Elsevier Ltd. All rights reserved.

Similarity in parasite community structure may be used to trace latitudinal migrations of Odontesthes smitti along Argentinean coasts.

PubMed

Carballo, M C; Cremonte, F; Navone, G T; Timi, J T

2012-01-01

The aims of this study were to determine the existence of migratory movements and to identify ecological stocks of the silverside Odontesthes smitti along its distribution in the Southern Atlantic Ocean, using metazoan parasites as biological tags. Samples were obtained from San José Gulf (SJ) (42° 25' S; 64° 07' W) and Nuevo Gulf (NG) (42° 47' S; 65° 02' W) in north Patagonia during winter and summer and in waters off Mar del Plata (MDP) (38° 03' S; 57° 32' W), Bonaerense region, during winter. Fifteen parasite species were collected. Multivariate statistical procedures on parasite community data showed strong effect of host size on the structure of parasite assemblages. Taking into account the variations among samples due to host size, the differential structure of parasite communities between SJ and NG suggests that fish inhabiting these localities could belong to different ecological stocks. Fish from MDP and SJ caught in summer showed similar composition in their parasite assemblages, which is congruent with a migratory cycle that implies that fish caught in MDP during winter inhabit SJ during summer. Further evidence of the Patagonian origin of MDP O. smitti is the presence of the digenean Proctotrema bartolii in fish from both regions. Proctotrema bartolii is acquired by O. smitti only in the Magellanic province, where its intermediate host, Darina solenoides, is distributed. The analyses suggest that O. smitti inhabiting north Patagonian gulfs could belong to different ecological stocks and that O. smitti caught in MDP could have come from SJ. © 2011 The Authors. Journal of Fish Biology © 2011 The Fisheries Society of the British Isles.

The role of physical exercise in obstructive sleep apnea.

PubMed

Andrade, Flávio Maciel Dias de; Pedrosa, Rodrigo Pinto

2016-01-01

ão arterial sistêmica secundária, associa-se ainda à fibrilação atrial, acidente vascular encefálico e doença arterial coronariana, aumentando a morbidade e mortalidade cardiovascular. O tratamento da AOS com pressão positiva contínua em vias aéreas não é tolerado por todos os pacientes e, muitas vezes, não é indicado para formas leves. Daí, métodos alternativos de tratamento da AOS e de suas consequências cardiovasculares são necessários. A prática usual de exercícios físicos promove benefícios adicionais à redução do peso em pacientes com AOS; contudo, os mecanismos ainda são incertos. Entre as adaptações fisiológicas proporcionadas pelo exercício físico nessa população destacam-se o aumento do tônus da musculatura dilatadora das vias aéreas superiores e do tempo do estágio do sono de ondas lentas e a redução do acúmulo cervical de líquido, da resposta inflamatória sistêmica e do peso corpóreo. Os principais benefícios de programas de exercício físico para essa população incluem a redução da gravidade da AOS e da sonolência diurna e o aumento da eficiência do sono e consumo máximo de oxigênio. Poucos estudos avaliaram o papel do exercício físico realizado de forma isolada no tratamento da AOS, além de existirem muitas diferenças relacionadas aos protocolos de exercício utilizados. Entretanto, o emprego de exercícios aeróbios isolados ou combinados aos exercícios resistidos é um ponto comum entre os estudos. Nessa revisão, os principais estudos e mecanismos envolvidos no tratamento da AOS por meio da realização de exercícios físicos são apresentados. Além dos benefícios clínicos sistêmicos proporcionados pelo exercício físico, pacientes com AOS submetidos a um programa regular de exercícios predominantemente aeróbicos, apresentam redução da gravidade da doença e da sonolência diurna, aumento da eficiência do sono e do pico de consumo de oxigênio, independentemente da perda de peso.

Dinámica y crecimiento de los granos de polvo en la nebulosa protoplanetaria

NASA Astrophysics Data System (ADS)

de La Fuente Marcos, Carlos

2001-06-01

En el escenario estándar de la formación planetaria, los planetesimales (cuerpos de tamaño kilométrico) crecen a partir de granos de polvo, similares a los interestelares, embebidos en un disco gaseoso denominado nebulosa protoplanetaria. Durante esta etapa, los movimientos del gas pueden tener gran influencia en la dinámica y el crecimiento de los granos de polvo, dado que el flujo kepleriano del gas frena el movimiento de los mismos haciendo que caigan hacia el Sol, y la turbulencia inhibe la inestabilidad gravitacional de la capa de polvo. Aunque se acepta que los planetesimales fueron los elementos constituyentes de los planetas, todavía se desconoce cómo se produjo la formación de los mismos. Por esta razón, en los estudios más recientes, existe un renovado interés por comprender mejor la evolución de la capa de polvo inmersa en el disco gaseoso de la Nebulosa. El gas que fluye en el disco puede engendrar estructuras carentes de simetría axial, como por ejemplo ondas espirales y vórtices, a partir de gran variedad de mecanismos de excitación e inestabilidad. En 1995, Barge y Sommeria pusieron de manifiesto que la existencia de vórtices gaseosos persistentes en la nebulosa solar tendría importantes consecuencias sobre la formación de los planetesimales y el posterior crecimiento de los planetas gigantes. La investigación desarrollada en esta Tesis analiza la relación entre el polvo y el gas debida al acoplamiento por fricción dinámica entre ambos; en concreto, se estudia el efecto del flujo medio del gas sobre la dinámica de las partículas de polvo. El primer objetivo es investigar en profundidad los procesos de captura y crecimiento de los granos de polvo dentro de un vórtice y su posible relevancia en cuanto a la formación de los planetesimales. El segundo objetivo es la exploración de los efectos de ondas espirales propagándose en el disco gaseoso sobre la dinámica y el crecimiento de las partículas. La presencia de líneas de

Recent rapid rise of a permethrin knock down resistance allele in Aedes aegypti in México.

PubMed

García, Gustavo Ponce; Flores, Adriana E; Fernández-Salas, Ildefonso; Saavedra-Rodríguez, Karla; Reyes-Solis, Guadalupe; Lozano-Fuentes, Saul; Guillermo Bond, J; Casas-Martínez, Mauricio; Ramsey, Janine M; García-Rejón, Julián; Domínguez-Galera, Marco; Ranson, Hilary; Hemingway, Janet; Eisen, Lars; Black IV, William C

2009-10-13

Aedes aegypti, the 'yellow fever mosquito', is the primary vector to humans of dengue and yellow fever flaviviruses (DENV, YFV), and is a known vector of the chikungunya alphavirus (CV). Because vaccines are not yet available for DENV or CV or are inadequately distributed in developing countries (YFV), management of Ae. aegypti remains the primary option to prevent and control outbreaks of the diseases caused by these arboviruses. Permethrin is one of the most widely used active ingredients in insecticides for suppression of adult Ae. aegypti. In 2007, we documented a replacement mutation in codon 1,016 of the voltage-gated sodium channel gene (para) of Ae. aegypti that encodes an isoleucine rather than a valine and confers resistance to permethrin. Ile1,016 segregates as a recessive allele conferring knockdown resistance to homozygous mosquitoes at 5-10 microg of permethrin in bottle bioassays. A total of 81 field collections containing 3,951 Ae. aegypti were made throughout México from 1996 to 2009. These mosquitoes were analyzed for the frequency of the Ile1,016 mutation using a melting-curve PCR assay. Dramatic increases in frequencies of Ile1,016 were recorded from the late 1990's to 2006-2009 in several states including Nuevo León in the north, Veracruz on the central Atlantic coast, and Yucatán, Quintana Roo and Chiapas in the south. From 1996 to 2000, the overall frequency of Ile1,016 was 0.04% (95% confidence interval (CI95) = 0.12%; n = 1,359 mosquitoes examined). The earliest detection of Ile1,016 was in Nuevo Laredo on the U.S. border in 1997. By 2003-2004 the overall frequency of Ile1,016 had increased approximately 100-fold to 2.7% (+ or - 0.80% CI95; n = 808). When checked again in 2006, the frequency had increased slightly to 3.9% (+ or - 1.15% CI95; n = 473). This was followed in 2007-2009 by a sudden jump in Ile1,016 frequency to 33.2% (+ or - 1.99% CI95; n = 1,074 mosquitoes). There was spatial heterogeneity in Ile1,016 frequencies among 2007

Further Evidence for Geochemical Diversity, and Possible Bimodality, Among Cumulate Eucrites

NASA Astrophysics Data System (ADS)

Warren, P. H.; Kallemeyn, G. W.

1992-07-01

We have used INAA, RNAA, and fused-bead analysis to determine the bulk compositions of numerous Antarctic eucrites (and also the LEW88516 SNC meteorite). Only a few of the most unusual eucrites can be discussed in the limited space here. Takeda et al. (1988) noted that Y791195 is a slowly cooled eucrite, with an equant, medium-grained texture, and pyroxene exsolution lamellae up to 10 micrometers across. In Y791195,81-3, we find lamellae up to 14 micrometers across. In this respect, Y791195 resembles RKPA80224, in which exsolution lamellae up to 12 micrometers across. We have previously discussed the evidence that RKPA80224 is a mildly accumulative rock that formed from an unusually low-mg parent melt. Our second analysis of RKPA80224 only partly confirms the unusually low incompatible trace element (ITE) content, but the Ce anomaly is consistently small (Ce/La = 0.90-1.02 x CI), and based on a weighted mean composition the implied parent melt is still unlike any noncumulate eucrite (see Fig. 1, which shows results from mass balance calculations modeling the sample as a mixture of cumulus px and plag, plus trapped melt). A parent melt similar to an extreme low-mg, variant of the "Nuevo Laredo Trend" would plausibly account for RKPA80224. The spectrum of possible parents for Y791195 is similar, even though its "true" Sm content is slightly obscured by weathering (Ce/La = 1.4 x CI). The [Sm] used in the figure is scaled to the highest CI-normalized REE concentration. Data of Mittlefehldt and Lindstrom (1991) indicate that except for exterior samples "showing extreme rustiness," Sm even in weathered eucrites is generally not altered beyond a few tens of pct. relative (sample size seems to account for more of the variation in [Sm] among interior, non-rusty samples). Even assuming a Sm content twice that assumed in the figure, the parent melt still must be well to the low-MgO/FeO, low-Sm side of all known eucrites. The LEW87002 eucrite is brecciated, but probably

Sexual competitiveness and compatibility between mass-reared sterile flies and wild populations of Anastrepha Ludens (Diptera: Tephritidae) from different regions in Mexico

DOE Office of Scientific and Technical Information (OSTI.GOV)

Orozco-Davila, D.; Hernandez, R.; Meza, S.

The mass-reared colony of Anastrepha ludens (Loew) currently used in Mexico for suppression of the Mexican fruit fly has been in use for over 10 years. Sterile flies are released into a wide range of environmental conditions as part of an integrated area-wide approach to suppress diverse populations of this pest in the Mexican Republic. This paper assesses the performance of the sterile flies interacting with wild populations from the different environments. We investigated the sexual compatibility and competitiveness of the sterile flies when competing with wild populations from 6 representatives Mexican states: Nuevo Leon, Tamaulipas, Sinaloa, Nayarit, Michoacan, andmore » Chiapas. Results show that the males of the wild populations differed in the time to the onset and peak of sexual activity. Nevertheless, the index of sexual isolation (ISI) reflected sexual compatibility between the populations and the mass-reared strain, indicating that the sterile individuals mate satisfactorily with the wild populations from the 6 states. The male relative performance index (MRPI) showed that the sterile male is as effective in copulating as the wild males. The female relative performance index (FRPI) reflected a general tendency for wild females to copulate in greater proportion than the sterile females, except for the strains from Tamaulipas and Chiapas. In general, the lower participation of the sterile females in copulation increases the possibilities of sterile males to mate with wild females. The relative sterility index (RSI) showed that the acceptance by wild females of the sterile males (25-55%) was similar to that of wild males. Females of the Chiapas strain showed the lowest acceptance of sterile males. Finally, the results obtained in the Fried test (which measures induced sterility in eggs) showed a competitiveness coefficient ranging from 0.2 to 0.5. This suggests that sterile males successfully compete and are compatible with flies from different geographic

Recent Rapid Rise of a Permethrin Knock Down Resistance Allele in Aedes aegypti in México

PubMed Central

García, Gustavo Ponce; Flores, Adriana E.; Fernández-Salas, Ildefonso; Saavedra-Rodríguez, Karla; Reyes-Solis, Guadalupe; Lozano-Fuentes, Saul; Guillermo Bond, J.; Casas-Martínez, Mauricio; Ramsey, Janine M.; García-Rejón, Julián; Domínguez-Galera, Marco; Ranson, Hilary; Hemingway, Janet; Eisen, Lars; Black, William C.

2009-01-01

Background Aedes aegypti, the ‘yellow fever mosquito’, is the primary vector to humans of dengue and yellow fever flaviviruses (DENV, YFV), and is a known vector of the chikungunya alphavirus (CV). Because vaccines are not yet available for DENV or CV or are inadequately distributed in developing countries (YFV), management of Ae. aegypti remains the primary option to prevent and control outbreaks of the diseases caused by these arboviruses. Permethrin is one of the most widely used active ingredients in insecticides for suppression of adult Ae. aegypti. In 2007, we documented a replacement mutation in codon 1,016 of the voltage-gated sodium channel gene (para) of Ae. aegypti that encodes an isoleucine rather than a valine and confers resistance to permethrin. Ile1,016 segregates as a recessive allele conferring knockdown resistance to homozygous mosquitoes at 5–10 µg of permethrin in bottle bioassays. Methods and Findings A total of 81 field collections containing 3,951 Ae. aegypti were made throughout México from 1996 to 2009. These mosquitoes were analyzed for the frequency of the Ile1,016 mutation using a melting-curve PCR assay. Dramatic increases in frequencies of Ile1,016 were recorded from the late 1990's to 2006–2009 in several states including Nuevo León in the north, Veracruz on the central Atlantic coast, and Yucatán, Quintana Roo and Chiapas in the south. From 1996 to 2000, the overall frequency of Ile1,016 was 0.04% (95% confidence interval (CI95) = 0.12%; n = 1,359 mosquitoes examined). The earliest detection of Ile1,016 was in Nuevo Laredo on the U.S. border in 1997. By 2003–2004 the overall frequency of Ile1,016 had increased ∼100-fold to 2.7% (±0.80% CI95; n = 808). When checked again in 2006, the frequency had increased slightly to 3.9% (±1.15% CI95; n = 473). This was followed in 2007–2009 by a sudden jump in Ile1,016 frequency to 33.2% (±1.99% CI95; n = 1,074 mosquitoes). There was spatial heterogeneity

PubMed

Oyarce Merino, Karina; Valladares Vega, Macarena; Elizondo-Vega, Roberto; Obregón, Ana María

2016-11-29

Introducción: cambios socioculturales como el incremento en el sedentarismo y el consumo de alimentos ricos en grasas y azúcares, sumado a características genéticas, han producido un aumento en las cifras de obesidad a nivel mundial. La evaluación temprana en niños, mediante el establecimiento de perfi les genéticos asociados a obesidad y a la regulación metabólica y hedónica de la alimentación, complementado con estudios de la conducta alimentaria, nos permitiría predecir la predisposición a la obesidad en etapas adultas.Objetivo: revisar los conceptos asociados a la conducta alimenticia, enfocándose en la regulación hedónica, que puede convertirse en un parámetro predictivo de obesidad en niños.Material y métodos: se revisó la bibliografía asociada a obesidad infantil y a la regulación homeostática y hedónica de la obesidad, como también parámetros génicos asociados a la obesidad. En la búsqueda de artículos se incluyó el trabajo en animales y humanos (adultos y niños, pero con énfasis en niños).Resultados: se analizaron los mecanismos celulares de la regulación de la ingesta, así como los estudios de conducta alimentaria en niños, entregando antecedentes y carencias en el desarrollo investigativo para la predicción de la obesidad infantil.Conclusión: la regulación hedónica de la ingesta alimenticia en niños, como perfi les genéticos asociados a receptores de dopamina, puede convertirse en un importante predictor de la obesidad. Es necesario incrementar el número de estudios que permitan defi nir de mejor forma, cuáles son los mejores parámetros para predecir el desarrollo de la obesidad adulta.

Taking care of the newborn dying and their families: Nurses' experiences of neonatal intensive care.

PubMed

Almeida, Fabiane de Amorim; Moraes, Mariana Salim de; Cunha, Mariana Lucas da Rocha

2016-06-01

To understand the experiences of nurses when caring for dying newborns and their families in the NICU; and redeem their perceptions about acting before the death and grieving process. A descriptive exploratory study with a qualitative approach, developed with nine nurses at the ICU of a hospital in São Paulo (SP), Brazil. Data was collected through semi-structured interviews and analyzed using the Collective Subject Discourse (CSD). Caring for newborns who are dying and their families is very difficult for nurses, due to the intense involvement. They seek strategies to deal with the situation and, before the newborn's death, despite the suffering, express the feeling of accomplishment. Facing death and grief triggers mechanisms that emerge life references, coming across painful issues. Learning to deal with these questions is a daily challenge for nurses of the NICU. Compreender as experiências vivenciadas por enfermeiros ao cuidar de neonatos que estão morrendo e seus familiares na UTIN; e resgatar as suas percepções sobre a atuação diante do processo de morte e luto. Estudo descritivo exploratório, de abordagem qualitativa, desenvolvido com nove enfermeiras da UTIN de um hospital de São Paulo (SP), Brasil. Os dados foram coletados por meio de entrevista semi-estruturada e analisados pela técnica do Discurso de Sujeito Coletivo (DSC). Cuidar de neonatos que estão morrendo e suas famílias é muito difícil para as enfermeiras, devido ao intenso envolvimento. Buscam estratégias para lidar com a situação e, diante do óbito do neonato, apesar do sofrimento, manifestam o sentimento de dever cumprido. Enfrentar a morte e o luto aciona mecanismos que afloram referências de vida, deparando-se com questões dolorosas. Aprender a lidar com essas questões é um desafio diário para os enfermeiros de UTIN.

Evolución de estrellas de Helio

NASA Astrophysics Data System (ADS)

Panei, J. A.; Benvenuto, O. G.; Althaus, L. G.

Podríamos identificar a las estrellas de helio con estrellas Wolf-Rayet (WR) que han perdido su envoltura rica en hidrógeno ya sea porque las mismas pertenecen a sistemas binarios o a través de fuertes vientos estelares. Las WR representan una etapa evolucionaria normal de las estrellas masivas, cuya pérdida de masa es >= 3 × 10-5Msolar/yr y la cual es sufrida por la estrella en un tiempo de escala mucho menor que el tiempo en que se produce la quema del He. Esto garantiza la ``homogeneidad'' de las estrellas de helio para nuestros modelos. Este tipo de estrellas serían posibles progenitores de SN tipo Ib y Ic. Aquí presentamos un estudio sobre la evolución de estrellas de helio a partir de la secuencia principal de helio, pasando por el flash de carbono, hasta agotarlo en la región central; como así también la dependencia con la variable masa y con la pérdida de la misma para distintos tipos de masas. Para tal fin hemos utilizado un código de evolución estelar completo que realiza todas las reacciones de Fowler en forma simultánea. También se han tenido en cuenta los procesos de mezcla convectiva, los principales mecanismos de emisión de neutrinos y los efectos de la pérdida de masa. Las opacidades utilizadas fueron las de Rogers & Iglesias (1992). Debido a la pérdida de masa en este tipo de estrellas, hemos encontrado que los perfiles convectivos, la composición química, las condiciones centrales de temperatura y presión, luminosidad y temperatura efectiva dependen en forma esencial de la velocidad de pérdida de masa adoptada, lo que tendría profundas implicaciones en la evolución posterior de estos objetos.

Novas determinações dos parâmetros atmosféricos das estrelas anãs brancas DA

NASA Astrophysics Data System (ADS)

Giovannini, O.; Costa, A. F. M.; Kepler, S. O.

2003-08-01

Nós temos selecionado uma amostra de estrelas anãs brancas DA (atmosfera de hidrogênio) a partir dos índices de Strömgren cujos valores estão próximos a região de instabilidade das estrelas anãs brancas DA variáveis, as chamadas estrelas DAV ou ZZ Ceti. O objetivo é determinar os parâmetros fundamentais (temperatura efetiva, Teff, aceleração da gravidade, log g, e massa) destas estrelas para verificar quais os parâmetros estelares estão envolvidos com o mecanismo de pulsação das estrelas DAV. Nós obtemos, até agora, mais de 120 espectros óticos de estrelas DA. Entre as estrelas selecionadas há 20 estrelas variáveis (DAV). Assim, podemos verificar se existem ou não estrelas não variáveis dentro da faixa de instabilidade das estrelas ZZ Ceti. Neste trabalho nós apresentamos a determinação dos parâmetros atmosféricos (temperatura efetiva, Teff, e aceleração da gravidade, log g) das estrelas anãs brancas DA usando os novos modelos de atmosfera ML2/a = 0.6. Estes modelos têm sido utilizados recentemente por fornecerem uma excelente consistência interna na determinação das temperaturas nas regiões do ultra-violeta e ótico. Os parâmetros atmosféricos são determinados espectroscopicamente através da comparação do fluxo de energia das linhas de Balmer (Hb à H9) entre os espectros observados e sintéticos (gerados pelos modelos de atmosfera). As temperaturas obtidas com os novos modelos são, em geral, menores (~ 1000 K menos) que as temperaturas determinadas anteriormente, com modelos ML1. Os valores de log g não mudaram significativamente (menos de 10%). A faixa de instabilidade das DAVs está entre 11000 e 13000 K, consistente com dados de outros autores.

Evaluating trauma care capabilities in Mexico with the World Health Organization's Guidelines for Essential Trauma Care publication.

PubMed

Arreola-Risa, Carlos; Mock, Charles; Vega Rivera, Felipe; Romero Hicks, Eduardo; Guzmán Solana, Felipe; Porras Ramírez, Giovanni; Montiel Amoroso, Gilberto; de Boer, Melanie

2006-02-01

To identify affordable, sustainable methods to strengthen trauma care capabilities in Mexico, using the standards in the Guidelines for Essential Trauma Care, a publication that was developed by the World Health Organization and the International Society of Surgery to provide recommendations on elements of trauma care that should be in place in the various levels of health facilities in all countries. The Guidelines publication was used as a basis for needs assessments conducted in 2003 and 2004 in three Mexican states. The states were selected to represent the range of geographic and economic conditions in the country: Oaxaca (south, lower economic status), Puebla (center, middle economic status), and Nuevo León (north, higher economic status). The sixteen facilities that were assessed included rural clinics, small hospitals, and large hospitals. Site visits incorporated direct inspection of physical resources as well as interviews with key administrative and clinical staff. Human and physical resources for trauma care were adequate in the hospitals, especially the larger ones. The survey did identify some deficiencies, such as shortages of stiff suction tips, pulse oximetry equipment, and some trauma-related medications. All of the clinics had difficulties with basic supplies for resuscitation, even though some received substantial numbers of trauma patients. In all levels of facilities there was room for improvement in administrative functions to assure quality trauma care, including trauma registries, trauma-related quality improvement programs, and uniform in-service training. This study identified several low-cost ways to strengthen trauma care in Mexico. The study also highlighted the usefulness of the recommended norms in the Guidelines for Essential Trauma Care publication in providing a standardized template by which to assess trauma care capabilities in nations worldwide.

Foraging area fidelity for Kemp's ridleys in the Gulf of Mexico.

PubMed

Shaver, Donna J; Hart, Kristen M; Fujisaki, Ikuko; Rubio, Cynthia; Sartain, Autumn R; Peña, Jaime; Burchfield, Patrick M; Gamez, Daniel Gomez; Ortiz, Jaime

2013-07-01

For many marine species, locations of key foraging areas are not well defined. We used satellite telemetry and switching state-space modeling (SSM) to identify distinct foraging areas used by Kemp's ridley turtles (Lepidochelys kempii) tagged after nesting during 1998-2011 at Padre Island National Seashore, Texas, USA (PAIS; N = 22), and Rancho Nuevo, Tamaulipas, Mexico (RN; N = 9). Overall, turtles traveled a mean distance of 793.1 km (±347.8 SD) to foraging sites, where 24 of 31 turtles showed foraging area fidelity (FAF) over time (N = 22 in USA, N = 2 in Mexico). Multiple turtles foraged along their migratory route, prior to arrival at their "final" foraging sites. We identified new foraging "hotspots" where adult female Kemp's ridley turtles spent 44% of their time during tracking (i.e., 2641/6009 tracking days in foraging mode). Nearshore Gulf of Mexico waters served as foraging habitat for all turtles tracked in this study; final foraging sites were located in water <68 m deep and a mean distance of 33.2 km (±25.3 SD) from the nearest mainland coast. Distance to release site, distance to mainland shore, annual mean sea surface temperature, bathymetry, and net primary production were significant predictors of sites where turtles spent large numbers of days in foraging mode. Spatial similarity of particular foraging sites selected by different turtles over the 13-year tracking period indicates that these areas represent critical foraging habitat, particularly in waters off Louisiana. Furthermore, the wide distribution of foraging sites indicates that a foraging corridor exists for Kemp's ridleys in the Gulf. Our results highlight the need for further study of environmental and bathymetric components of foraging sites and prey resources contained therein, as well as international cooperation to protect essential at-sea foraging habitats for this imperiled species.

The effects of socioeconomic status, clinical factors, and genetic ancestry on pulmonary tuberculosis disease in northeastern Mexico.

PubMed

Young, Bonnie N; Rendón, Adrian; Rosas-Taraco, Adrian; Baker, Jack; Healy, Meghan; Gross, Jessica M; Long, Jeffrey; Burgos, Marcos; Hunley, Keith L

2014-01-01

Diverse socioeconomic and clinical factors influence susceptibility to tuberculosis (TB) disease in Mexico. The role of genetic factors, particularly those that differ between the parental groups that admixed in Mexico, is unclear. The objectives of this study are to identify the socioeconomic and clinical predictors of the transition from latent TB infection (LTBI) to pulmonary TB disease in an urban population in northeastern Mexico, and to examine whether genetic ancestry plays an independent role in this transition. We recruited 97 pulmonary TB disease patients and 97 LTBI individuals from a public hospital in Monterrey, Nuevo León. Socioeconomic and clinical variables were collected from interviews and medical records, and genetic ancestry was estimated for a subset of 142 study participants from 291,917 single nucleotide polymorphisms (SNPs). We examined crude associations between the variables and TB disease status. Significant predictors from crude association tests were analyzed using multivariable logistic regression. We also compared genetic ancestry between LTBI individuals and TB disease patients at 1,314 SNPs in 273 genes from the TB biosystem in the NCBI BioSystems database. In crude association tests, 12 socioeconomic and clinical variables were associated with TB disease. Multivariable logistic regression analyses indicated that marital status, diabetes, and smoking were independently associated with TB status. Genetic ancestry was not associated with TB disease in either crude or multivariable analyses. Separate analyses showed that LTBI individuals recruited from hospital staff had significantly higher European genetic ancestry than LTBI individuals recruited from the clinics and waiting rooms. Genetic ancestry differed between individuals with LTBI and TB disease at SNPs located in two genes in the TB biosystem. These results indicate that Monterrey may be structured with respect to genetic ancestry, and that genetic differences in TB

The Effects of Socioeconomic Status, Clinical Factors, and Genetic Ancestry on Pulmonary Tuberculosis Disease in Northeastern Mexico

PubMed Central

Young, Bonnie N.; Rendón, Adrian; Rosas-Taraco, Adrian; Baker, Jack; Healy, Meghan; Gross, Jessica M.; Long, Jeffrey; Burgos, Marcos; Hunley, Keith L.

2014-01-01

Diverse socioeconomic and clinical factors influence susceptibility to tuberculosis (TB) disease in Mexico. The role of genetic factors, particularly those that differ between the parental groups that admixed in Mexico, is unclear. The objectives of this study are to identify the socioeconomic and clinical predictors of the transition from latent TB infection (LTBI) to pulmonary TB disease in an urban population in northeastern Mexico, and to examine whether genetic ancestry plays an independent role in this transition. We recruited 97 pulmonary TB disease patients and 97 LTBI individuals from a public hospital in Monterrey, Nuevo León. Socioeconomic and clinical variables were collected from interviews and medical records, and genetic ancestry was estimated for a subset of 142 study participants from 291,917 single nucleotide polymorphisms (SNPs). We examined crude associations between the variables and TB disease status. Significant predictors from crude association tests were analyzed using multivariable logistic regression. We also compared genetic ancestry between LTBI individuals and TB disease patients at 1,314 SNPs in 273 genes from the TB biosystem in the NCBI BioSystems database. In crude association tests, 12 socioeconomic and clinical variables were associated with TB disease. Multivariable logistic regression analyses indicated that marital status, diabetes, and smoking were independently associated with TB status. Genetic ancestry was not associated with TB disease in either crude or multivariable analyses. Separate analyses showed that LTBI individuals recruited from hospital staff had significantly higher European genetic ancestry than LTBI individuals recruited from the clinics and waiting rooms. Genetic ancestry differed between individuals with LTBI and TB disease at SNPs located in two genes in the TB biosystem. These results indicate that Monterrey may be structured with respect to genetic ancestry, and that genetic differences in TB

Respiration and heart rate at the surface between dives in northern elephant seals.

PubMed

Le Boeuf, B J; Crocker, D E; Grayson, J; Gedamke, J; Webb, P M; Blackwell, S B; Costa, D P

2000-11-01

All underwater activities of diving mammals are constrained by the need for surface gas exchange. Our aim was to measure respiratory rate (fb) and heart rate (fh) at the surface between dives in free-ranging northern elephant seals Mirounga angustirostris. We recorded fb and fh acoustically in six translocated juveniles, 1.8-2. 4 years old, and three migrating adult males from the rookery at Año Nuevo, California, USA. To each seal, we attached a diving instrument to record the diving pattern, a satellite tag to track movements and location, a digital audio tape recorder or acoustic datalogger with an external hydrophone to record the sounds of respiration and fh at the surface, and a VHF transmitter to facilitate recovery. During surface intervals averaging 2.2+/-0.4 min, adult males breathed a mean of 32.7+/-5.4 times at a rate of 15. 3+/-1.8 breaths min(-)(1) (means +/- s.d., N=57). Mean fh at the surface was 84+/-3 beats min(-)(1). The fb of juveniles was 26 % faster than that of adult males, averaging 19.2+/-2.2 breaths min(-)(1) for a mean total of 41.2+/-5.0 breaths during surface intervals lasting 2.6+/-0.31 min. Mean fh at the surface was 106+/-3 beats min(-)(1). fb and fh did not change significantly over the course of surface intervals. Surface fb and fh were not clearly associated with levels of exertion, such as rapid horizontal transit or apparent foraging, or with measures of immediately previous or subsequent diving performance, such as diving duration, diving depth or swimming speed. Together, surface respiration rate and the duration of the preceding dive were significant predictors of surface interval duration. This implies that elephant seals minimize surface time spent loading oxygen depending on rates of oxygen uptake and previous depletion of stores.

Willingness toward organ and body donation among anatomy professors and students in Mexico.

PubMed

Quiroga-Garza, Alejandro; Reyes-Hernández, Cynthia Guadalupe; Zarate-Garza, Pablo Patricio; Esparza-Hernández, Claudia Nallely; Gutierrez-de la O, Jorge; de la Fuente-Villarreal, David; Elizondo-Omaña, Rodrigo Enrique; Guzman-Lopez, Santos

2017-11-01

Most anatomists agree that cadaver dissection serves as a superior teaching tool in human anatomy education. However, attitudes toward body donation vary widely between different individuals. A questionnaire was developed to determine the attitudes toward body and organ donation among those who learn the most from cadavers: medical students, medical student teaching assistants, medical students involved in research, and anatomy professors. A cross-sectional, prospective study was designed in which the questionnaire was distributed among first-year human anatomy students before undertaking cadaver dissection at the beginning of the semester, and then again after a commemoration service at the end of the course. The questionnaire items included demographic data, as well as questions designed to characterize participants' attitudes regarding body/organ donation from strangers, family members, and whether participants would consider such practices with their own bodies. Out of a total of 517 students enrolled in the Human Anatomy course in the Medical School at the Universidad Autónoma de Nuevo León, Mexico during January to June 2016, 95% responded to the first (491) and second (490) surveys. Participants' opinions on their own organ donation was similar before and after exposure to cadaver dissection, with between 87% and 81% in favor of such practices, and only 3% against it, in both surveys. Participants' willingness to donate their own bodies, as well as those of family members, increased, while reluctance regarding such practices decreased by half (P < 0.0001 and P < 0.05). Professors had the highest rates of positive opinions regarding their own body donation (74.9%), with 18.8% undecided. Low opposition toward organ and body donation remains prevalent among both anatomists and physicians in training in Mexico. Anat Sci Educ 10: 589-597. © 2017 American Association of Anatomists. © 2017 American Association of Anatomists.

Characterization and origin of EC and OC particulate matter near the Doñana National Park (SW Spain).

PubMed

de la Campa, A M Sánchez; Pio, C; de la Rosa, J D; Querol, X; Alastuey, A; González-Castanedo, Y

2009-08-01

In the South of Spain, major industrial estates (e.g. Huelva) exist alongside ecologically interesting zones (e.g. Doñana National Park). Between June 2005 and June 2006, PM10 and PM2.5 were measured, for total mass, organic carbon (OC) and elemental carbon (EC) chemical composition, at a station in an ecologically interesting area located near Doñana National Park and an urban background area with industrial influence. The mean OC concentration is higher in the urban background (3.5 microg m(-3)) than in the rural monitoring station (2.8 microg m(-3)) as a consequence of local emissions (e.g. traffic). A total of 82% of TC is OC in the rural station, while the urban background station reveals 70% and 73% of TC in the PM10 and PM2.5 mass, respectively. The study of air-mass origin and characterization of carbonaceous species in the course of simultaneous sampling in rural and urban background monitoring stations differentiated three long-range air-mass transports: a North-African dust outbreak, Atlantic Advection and Continental (N-NW) episodes, the origins of the first and last of which are more heavily influenced by the anthropogenic emissions from industrial estates located around the city of Huelva (Punta del Sebo and Nuevo Puerto). Higher values were measured for OC and EC in the study area during the North-African dust outbreak, similar to those obtained during the Continental episode (N-NW), which was clearly influenced by industrial emissions, followed by the Atlantic Advection episodes. The comparison of carbon species with air-mass origin can help to discriminate the origin and source of particulate matter, as well as to determine the urban impact on rural areas.

Introduccion a la hidraulica de aguas subterraneas : un texto programado para auto-ensenanza

USGS Publications Warehouse

Bennett, Gordon D.

1987-01-01

Este ' texto programado esta diseflado para ayudarle a comprender la teoria de la hidniulica de aguas subterraneas por medio de la auto-enseflanza. La instrucci6n programada es un enfoque a una materia, un metodo de aprender;que no elimina el esfuerzo mental del proceso de aprendizaje. Algunas secciones de este programa necesitan solamente ser leidas; otras tendrian que ser elaboradas con lapiz y papel. Algunas preguntas pueden ser contestadas directamente; otras requieren calculos. A medida que se avanza en el texto, tendra que consultar frecuentemente textos o referencias sobre matematicas, mecanica de fluidos e hidrologia. En cada una de las ocho partes del texto, inicie el programa de instrucci6n leyendo la Secci6n 1. Elija una respuesta a la pregunta al final de la secci6n y dirijase a la nueva secci6n indicada al lado de la respuesta escogida. Si su respuesta fue correcta, pase a la secci6n que contiene materia nueva y otra pregunta, y proceda tal como en la Secci6n 1. Si su respuesta no fue correcta, dirijase a la secci6n que contiene explicaciones adicionales sobre el tema anterior y que le indica volver a la pregunta inicial e intentar de nuevo. En este caso, valdra Ia pena repasar el material de la secci6n anterior. Continue de esta man era en el programa hasta que llegue a Ia secci6n que indica el final de la parte. Observe que aunque las secciones estan en orden numerico en cada una de las ocho partes, por lo general, usted no procedeni en secuencia numerica (Secci6n 1 ala Secci6n 2, etc.) de principia a fin.

Criminal Code, Federal District, 16 February 1971.

PubMed

1988-01-01

Article 320 of the Criminal Code of the Federal District of Mexico defines "abortion" as the death of the conceptus at any time during pregnancy. Articles 320-32 specify penalties for inducing abortion, and Articles 333-34 exempt punishment if the abortion resulted from failure of the woman to take proper care, if the pregnancy was the result of rape, or if the pregnancy endangered the life of the woman. The abortion provisions of the criminal codes of the Mexican states of Baja California, Chiapas, Mexico, Sinoala, Sonora, Tabasco, and Tamaulipas are nearly identical to those of the Federal District Code. Certain states also give immunity from prosecution for abortion 1) if the pregnancy resulted from artificial insemination neither requested or assented to by the woman, provided that the abortion is carried out within the first 90 days of pregnancy; 2) if there is good reason to believe that the unborn child suffers from severe physical or mental disabilities of genetic or congenital origin; 3) if the health of the woman would be seriously jeopardized by the pregnancy, and 4) if the abortion is carried out for serious and substantiated economic reasons in cases where the woman has at least three children. Guanajuato and Queretaro allow abortions only when the pregnancy is the result of rape. Guerrero authorizes abortions only when the pregnancy is the result of rape, when the pregnancy results from an unlawful artificial insemination, or for eugenic reasons. Hidalgo, Nuevo Leon, and San Luis Potosi allows abortions only when the pregnancy is the result of rape or when the continuation of the pregnancy would seriously jeopardize the woman's health. In Chihuahua, Coahuila, Durango, Oaxaca, and Veracruz, abortions allowed because the pregnancy resulted from rape must be performed in the first 90 days of pregnancy.

Effects of age, colony, and sex on mercury concentrations in California sea lions

USGS Publications Warehouse

McHuron, Elizibeth A; Peterson, Sarah H.; Ackerman, Joshua T.; Melin, Sharon R.; Harris, Jeffrey D.; Costa, Daniel P.

2016-01-01

We measured total mercury (THg) concentrations in California sea lions (Zalophus californianus) and examined how concentrations varied with age class, colony, and sex. Because Hg exposure is primarily via diet, we used nitrogen (δ 15N) and carbon (δ 13C) stable isotopes to determine if intraspecific differences in THg concentrations could be explained by feeding ecology. Blood and hair were collected from 21 adult females and 57 juveniles from three colonies in central and southern California (San Nicolas, San Miguel, and Año Nuevo Islands). Total Hg concentrations ranged from 0.01 to 0.31 μg g−1 wet weight (ww) in blood and 0.74 to 21.00 μg g−1 dry weight (dw) in hair. Adult females had greater mean THg concentrations than juveniles in blood (0.15 vs. 0.03 μg−1 ww) and hair (10.10 vs. 3.25 μg−1 dw). Age class differences in THg concentrations did not appear to be driven by trophic level or habitat type because there were no differences in δ 15N or δ 13C values between adults and juveniles. Total Hg concentrations in adult females were 54 % (blood) and 24 % (hair) greater in females from San Miguel than females from San Nicolas Island, which may have been because sea lions from the two islands foraged in different areas. For juveniles, we detected some differences in THg concentrations with colony and sex, although these were likely due to sampling effects and not ecological differences. Overall, THg concentrations in California sea lions were within the range documented for other marine mammals and were generally below toxicity benchmarks for fish-eating wildlife.

Developing Community-Based Rehabilitation Programs for Musculoskeletal Diseases in Low-Income Areas of Mexico: The Community-Based Rehabilitation for Low-Income Communities Living With Rheumatic Diseases (CONCORD) Protocol

PubMed Central

2014-01-01

Background The negative impact of musculoskeletal diseases on the physical function and quality of life of people living in developing countries is considerable. This disabling effect is even more marked in low-socioeconomic communities within developing countries. In Mexico, there is a need to create community-based rehabilitation programs for people living with musculoskeletal diseases in low-socioeconomic areas. These programs should be directed to prevent and decrease disability, accommodating the specific local culture of communities. Objective The objective of this paper is to describe a research protocol designed to develop, implement, and evaluate culturally sensitive community-based rehabilitation programs aiming to decrease disability of people living with musculoskeletal diseases in two low-income Mexican communities. Methods A community-based participatory research approach is proposed, including multi and transdisciplinary efforts among the community, medical anthropology, and the health sciences. The project is structured in 4 main stages: (1) situation analysis, (2) program development, (3) program implementation, and (4) program evaluation. Each stage includes the use of quantitative and qualitative methods (mixed method program). Results So far, we obtained resources from a Mexican federal agency and completed stage one of the project at Chankom, Yucatán. We are currently receiving funding from an international agency to complete stage two at this same location. We expect that the project at Chankom will be concluded by December of 2017. On the other hand, we just started the execution of stage one at Nuevo León with funding from a Mexican federal agency. We expect to conclude the project at this site by September of 2018. Conclusions Using a community-based participatory research approach and a mixed method program could result in the creation of culturally sensitive community-based rehabilitation programs that promote community development and

Genetic Differentiation of Colombian Populations of Anopheles darlingi Root (Diptera: Culicidae).

PubMed

Rosero, C Y; Jaramillo, G I; Gonzalez, R; Cardenas, H

2017-10-01

Anopheles darlingi Root is a primary vector of malaria in the neotropic region, a species not just highly anthropophilic but very efficient in transmitting Plasmodium species and considered the most important vector in the Amazon region. The main goal of this study was to determine the genetic structure of the A. darlingi populations using microsatellites (STR) in western and eastern regions of Colombia. DNA extraction was done with the cited protocol of band using the Genomic Prep™ cell and tissue isolation commercial kits. We used the STR reported by Conn et al (Mol Ecol Notes 1: 223-225, 2001). The analysis with STR proved there was a high genetic diversity and significant alterations of the Hardy-Weinberg equilibrium. The greatest genetic diversity was recorded in Mitu (Vaupes) (Na = 14, Ho = 0.520). The lowest was in Pueblo Nuevo (Cordoba) (Na = 12, Ho = 0.457). The eastern region and the Mitu (Vaupes) populations presented the highest number of primer alleles (Ap = 30; Ap = 13; Ap = 9), with variations between 0.010 and 0.097. The AMOVA revealed that the whole population underwent moderate genetic differentiation (F ST  = 0.063, p < 0.05). The same differentiation was noticed (0.06 < F ST  > 0.06, p < 0.05) with five of the six populations included in this job, and there was a low differentiation in the Las Margaritas (Santander) area (F ST  = 0.02s3, p < 0.05). Our results suggest a slight positive correlation, which does not show a statistical significance between the geographic and genetic distances, probably suggesting that the moderate genetic differentiation found between pairs of populations does not need to be explained for the hypothesis of separation by distance.

Description of the immature stages of the planthopper Lacertinella australis (Hemiptera: Delphacidae)

PubMed Central

Batiz, M. F. Rossi; Marino de Remes Lenicov, A. M.; Hagedorn, Henry

2014-01-01

Abstract The five immature stages of the planthopper Lacertinella australis (Remes Lenicov and Rossi Batiz) (Hemiptera: Delphacidae: Saccharosydnini) are described and illustrated. The main characters that allowed us to distinguish the various stages were body size, number of tarsomeres and metatibial spines, and number of teeth on the spur. New biological data based on laboratory rearing and field observations showed that L. australis can carry out its biological cycle successfully on the graminaceous pampas grass ( Cortaderia spp. Stapf (Poales: Poaceae)). In addition, the efficient rearing in captivity, the high survivorship registered, and overwintering only on this host plant suggests that L. australis is a potential biocontrol agent of this invasive graminaceous weed. This study provides information about the immature stages , including a key for their identification, based on laboratory reared specimens and field observations. Resumen Se describen e ilustran las cinco etapas inmaduras de la especie de Saccharisydnini Lacertinella australis (Remes Lenicov and Rossi Batiz) (Hemiptera: Delphacidae). Los principales caracteres que permitieron distinguir las diferentes etapas fueron: tamaño corporal, número de espinas en los tarsómeros y metatibia y número de dientes en el espolón tibial. Nuevos datos biológicos, basados en la cría de laboratorio y observaciones de campo, mostraron que L. australis puede realizar su ciclo biológico exitosamente en la graminácea cortadera ( Cortaderia spp. Stapf (Poales: Poaceae)). Además, la eficiente crianza en cautive-rio y la alta supervivencia registrada en esta planta hospedera, sugieren que L. australis podría ser usada como un potencial agente de control biológico de esta maleza invasora. Este estudio proporciona informa-ción sobre las etapas inmaduras, incluyendo una clave para su identificación, basada en individuos provenientes de la cría de laboratorio y de campo. PMID:25199992

Serological activity of white-tail deer against several species of Brucella.

PubMed

Salinas-Meléndez, J A; Martínez-Muñoz, A; Avalos-Ramírez, R; Cerutti-Pereyra, N; Riojas-Valdés, V M

1998-01-01

In Mexico, brucellosis is a widely distributed disease of domesticated ruminants, but its frequency in wild ruminants has not been documented. Since northeast Mexico is the main distribution area of white-tailed deer and has been reported as an area positive for brucellosis in domesticated species, the present study was conducted in order to determine serological activity against several species of the genus Brucella in white-tailed deer. A total of 208 sera of white-tailed deer were collected during the springs of 1994 and 1995 in the north part of the states of Nuevo León and Coahuila. Each serum was analyzed for the detection of antibodies against two smooth (B. abortus and B. melitensis) and one rough (B. ovis) species of the genus Brucella. The serological tests used for the determination of the presence of antibodies against Brucella were card and plate agglutination for B. abortus, plate agglutination and rivanol precipitation for B. melitensis, and agar gel immunodiffusion for B. ovis. Each assay had positive and negative controls. None of the analyzed samples was found to be positive, and only two sera showed partial plate agglutination against B. melitensis at a dilution of 1:25; however, at higher dilutions and to the rivanol precipitation test the same samples were negative. Therefore, the percentage of positive sera was estimated at 0% (0/208). This result makes evident the absence of positive white-tailed deer against Brucella in the sampled area, despite that this disease is considered present in domesticated species. Therefore, white-tailed deer does not have, at the present time, an important role for the dispersion of the disease. The same result has been reported in other countries.

Foraging area fidelity for Kemp's ridleys in the Gulf of Mexico

USGS Publications Warehouse

Shaver, Donna J.; Hart, Kristen M.; Fujisaki, Ikuko; Rubio, Cynthia; Sartain-Iverson, Autumn R.; Peña, Jaime; Burchfield, Patrick M.; Gamez, Daniel Gomez; Ortiz, Jaime

2013-01-01

For many marine species, locations of key foraging areas are not well defined. We used satellite telemetry and switching state-space modeling (SSM) to identify distinct foraging areas used by Kemp's ridley turtles (Lepidochelys kempii) tagged after nesting during 1998–2011 at Padre Island National Seashore, Texas, USA (PAIS; N = 22), and Rancho Nuevo, Tamaulipas, Mexico (RN; N = 9). Overall, turtles traveled a mean distance of 793.1 km (±347.8 SD) to foraging sites, where 24 of 31 turtles showed foraging area fidelity (FAF) over time (N = 22 in USA, N = 2 in Mexico). Multiple turtles foraged along their migratory route, prior to arrival at their "final" foraging sites. We identified new foraging "hotspots" where adult female Kemp's ridley turtles spent 44% of their time during tracking (i.e., 2641/6009 tracking days in foraging mode). Nearshore Gulf of Mexico waters served as foraging habitat for all turtles tracked in this study; final foraging sites were located in water <68 m deep and a mean distance of 33.2 km (±25.3 SD) from the nearest mainland coast. Distance to release site, distance to mainland shore, annual mean sea surface temperature, bathymetry, and net primary production were significant predictors of sites where turtles spent large numbers of days in foraging mode. Spatial similarity of particular foraging sites selected by different turtles over the 13-year tracking period indicates that these areas represent critical foraging habitat, particularly in waters off Louisiana. Furthermore, the wide distribution of foraging sites indicates that a foraging corridor exists for Kemp's ridleys in the Gulf. Our results highlight the need for further study of environmental and bathymetric components of foraging sites and prey resources contained therein, as well as international cooperation to protect essential at-sea foraging habitats for this imperiled species.

Migratory corridors of adult female Kemp’s ridley turtles in the Gulf of Mexico

USGS Publications Warehouse

Shaver, Donna J.; Hart, Kristen M.; Fujisaki, Ikuko; Rubio, Cynthia; Sartain-Iverson, Autumn R.; Pena, Jaime; Gamez, Daniel Gomez; Gonzales Diaz Miron, Raul de Jesus; Burchfield, Patrick M.; Martinez, Hector J.; Ortiz, Jaime

2016-01-01

For many marine species, locations of migratory pathways are not well defined. We used satellite telemetry and switching state-space modeling (SSM) to define the migratory corridor used by Kemp's ridley turtles (Lepidochelys kempii) in the Gulf of Mexico. The turtles were tagged after nesting at Padre Island National Seashore, Texas, USA from 1997 to 2014 (PAIS; n = 80); Rancho Nuevo, Tamaulipas, Mexico from 2010 to 2011 (RN; n = 14); Tecolutla, Veracruz, Mexico from 2012 to 2013 (VC; n = 13); and Gulf Shores, Alabama, USA during 2012 (GS; n = 1). The migratory corridor lies in nearshore Gulf of Mexico waters in the USA and Mexico with mean water depth of 26 m and a mean distance of 20 km from the nearest mainland coast. Migration from the nesting beach is a short phenomenon that occurs from late-May through August, with a peak in June. There was spatial similarity of post-nesting migratory pathways for different turtles over a 16 year period. Thus, our results indicate that these nearshore Gulf waters represent a critical migratory habitat for this species. However, there is a gap in our understanding of the migratory pathways used by this and other species to return from foraging grounds to nesting beaches. Therefore, our results highlight the need for tracking reproductive individuals from foraging grounds to nesting beaches. Continued tracking of adult females from PAIS, RN, and VC nesting beaches will allow further study of environmental and bathymetric components of migratory habitat and threats occurring within our defined corridor. Furthermore, the existence of this migratory corridor in nearshore waters of both the USA and Mexico demonstrates that international cooperation is necessary to protect essential migratory habitat for this imperiled species.

Inter-nesting movements and habitat-use of adult female Kemp’s ridley turtles in the Gulf of Mexico

USGS Publications Warehouse

Shaver, Donna J.; Hart, Kristen M.; Fujisaki, Ikuko; Bucklin, David N.; Iverson, Autumn; Rubio, Cynthia; Backof, Thomas F.; Burchfield, Patrick M.; Gonzales Diaz Miron, Raul de Jesus; Dutton, Peter H.; Frey, Amy; Peña, Jaime; Gamez, Daniel Gomez; Martinez, Hector J.; Ortiz, Jaime

2017-01-01

Species vulnerability is increased when individuals congregate in restricted areas for breeding; yet, breeding habitats are not well defined for many marine species. Identification and quantification of these breeding habitats are essential to effective conservation. Satellite telemetry and switching state-space modeling (SSM) were used to define inter-nesting habitat of endangered Kemp’s ridley turtles (Lepidochelys kempii) in the Gulf of Mexico. Turtles were outfitted with satellite transmitters after nesting at Padre Island National Seashore, Texas, USA, from 1998 through 2013 (n = 60); Rancho Nuevo, Tamaulipas, Mexico, during 2010 and 2011 (n = 11); and Tecolutla, Veracruz, Mexico, during 2012 and 2013 (n = 11). These sites span the range of nearly all nesting by this species. Inter-nesting habitat lies in a narrow band of nearshore western Gulf of Mexico waters in the USA and Mexico, with mean water depth of 14 to 19 m within a mean distance to shore of 6 to 11 km as estimated by 50% kernel density estimate, α-Hull, and minimum convex polygon methodologies. Turtles tracked during the inter-nesting period moved, on average, 17.5 km/day and a mean total distance of 398 km. Mean home ranges occupied were 725 to 2948 km2. Our results indicate that these nearshore western Gulf waters represent critical inter-nesting habitat for this species, where threats such as shrimp trawling and oil and gas platforms also occur. Up to half of all adult female Kemp’s ridleys occupy this habitat for weeks to months during each nesting season. Because inter-nesting habitat for this species is concentrated in nearshore waters of the western Gulf of Mexico in both Mexico and the USA, international collaboration is needed to protect this essential habitat and the turtles occurring within it.

Oceanographic and atmospheric conditions on the continental shelf north of the Monterey Bay during August 2006

NASA Astrophysics Data System (ADS)

Ramp, Steven R.; Lermusiaux, Pierre F. J.; Shulman, Igor; Chao, Yi; Wolf, Rebecca E.; Bahr, Frederick L.

2011-09-01

A comprehensive data set from the ocean and atmosphere was obtained just north of the Monterey Bay as part of the Monterey Bay 2006 (MB06) field experiment. The wind stress, heat fluxes, and sea surface temperature were sampled by the Naval Postgraduate School's TWIN OTTER research aircraft. In situ data were collected using ships, moorings, gliders and AUVs. Four data-assimilating numerical models were additionally run, including the Coupled Ocean/Atmosphere Mesoscale Prediction System (COAMPS ®) model for the atmosphere and the Harvard Ocean Prediction System (HOPS), the Regional Ocean Modeling System (ROMS), and the Navy Coastal Ocean Model (NCOM) for the ocean. The scientific focus of the Adaptive Sampling and Prediction Experiment (ASAP) was on the upwelling/relaxation cycle and the resulting three-dimensional coastal circulation near a coastal promontory, in this case Point Año Nuevo, CA. The emphasis of this study is on the circulation over the continental shelf as estimated from the wind forcing, two ADCP moorings, and model outputs. The wind stress during August 2006 consisted of 3-10 day upwelling favorable events separated by brief 1-3 day relaxations. During the first two weeks there was some correlation between local winds and currents and the three models' capability to reproduce the events. During the last two weeks, largely equatorward surface wind stress forced the sea surface and barotropic poleward flow occurred over the shelf, reducing model skill at predicting the circulation. The poleward flow was apparently remotely forced by mesoscale eddies and alongshore pressure gradients, which were not well simulated by the models. The small, high-resolution model domains were highly reliant on correct open boundary conditions to drive these larger-scale poleward flows. Multiply-nested models were no more effective than well-initialized local models in this respect.

[Health needs of the diabetic user of primary care].

PubMed

Salinas-Martínez, A M; Muñoz-Moreno, F; Barraza de León, A R; Villarreal-Ríos, E; Núñez-Rocha, G M; Garza-Elizondo, M E

2001-01-01

To determine the extent and importance of unmet health needs of type 2 diabetic patients seen at primary care services. A cross-sectional study was conducted in 1999, among rural and urban patients of the Mexican Institute of Social Security, in Nuevo Leon, Mexico. The study population consisted of 256 subjects selected at random, diagnosed with type-II diabetes for at least two years. Data were obtained by interview and complemented with medical charts and provider interviews. Five health areas and four health determinants were evaluated, through Mexican Official Standards and American Diabetes Association standards of medical care for diabetic patients. Analysis consisted of descriptive statistics and estimation of z scores. Health needs were met in 49% of cases. A lower mean of health need satisfaction was found in rural regions as compared to urban regions (36.8% vs. 53.3%, p < .01). Nutrition was the most affected health area (z score = -6), followed by the physical exercise (z score = -1), the metabolic health area (z score = +1), the non-smoking health area (z score = +2), the prevention and early detection of complications health area (z score = +2), and the cognitive health area (z score = +3). The health determinant with the highest requirement corresponded to utilization (z score = -5), followed by resource availability (z score = -4), perceived health need (z score = +4), and access barriers (z score = +6). Health need measurement allows evaluating the effectiveness of existing interventions, in addition to identifying areas with higher unmet health needs. These findings facilitate analysis and decision-making to devise specific health policies and actions directed at improving the quality of care for diabetic patients. The English version of this paper is available at: http://www.insp.mx/salud/index.html

Regional stratigraphy and distribution of epigenetic stratabound celestine, fluorite, barite and Pb-Zn deposits in the MVT province of northeastern Mexico

NASA Astrophysics Data System (ADS)

González-Sánchez, Francisco; Camprubí, Antoni; González-Partida, Eduardo; Puente-Solís, Rafael; Canet, Carles; Centeno-García, Elena; Atudorei, Viorel

2009-04-01

Northeastern Mexico hosts numerous epigenetic stratabound carbonate-hosted low-temperature hydrothermal deposits of celestine, fluorite, barite and zinc-lead, which formed by replacement of Mesozoic evaporites or carbonate rocks. Such deposits can be permissively catalogued as Mississippi Valley-type (MVT) deposits. The deposits studied in the state of Coahuila are associated with granitic and metasedimentary basement highs (horsts) marginal or central to the Mesozoic Sabinas Basin. These horsts controlled the stratigraphy of the Mesozoic basins and subsequently influenced the Laramide structural pattern. The Sabinas Basin consists of ~6,000-m-thick Jurassic to Cretaceous siliciclastic, carbonate and evaporitic series. The MVT deposits are mostly in Barremian and in Aptian-Albian to Cenomanian formations and likely formed from basinal brines that were mobilized during the Laramide orogeny, although earlier diagenetic replacement of evaporite layers (barite and celestine deposits) and lining of paleokarstic cavities in reef carbonates (Zn-Pb deposits) is observed. Fluid inclusion microthermometry and isotopic studies suggest ore formation due to mixing of basinal brines and meteoric water. Homogenization temperatures of fluid inclusions range from 45°C to 210°C; salinities range from 0 to 26 wt.% NaCl equiv., and some inclusions contain hydrocarbons or bitumen. Sulfur isotope data suggest that most of the sulfur in barite and celestine is derived from Barremian to Cenomanian evaporites. Regional geology and a compilation of metallogenic features define the new MVT province of northeastern Mexico, which comprises most of the state of Coahuila and portions of the neighboring states of Nuevo León, Durango and, perhaps extends into Zacatecas and southern Texas. This province exhibits a regional metal zonation, with celestine deposits to the south, fluorite deposits to the north and barite and Zn-Pb deposits mostly in the central part.

Earth Observation

NASA Image and Video Library

2013-06-11

ISS036-E-007165 (11 June 2013) --- Nevados de Chillan, Chile is featured in this image photographed by an Expedition 36 crew member on the International Space Station. This photograph highlights a large volcanic area located near the Chile-Argentina border. Like other historically active volcanoes in the central Andes ranges, the Nevados de Chillan were created by upwelling magma generated by eastward subduction of the dense oceanic crust of the Pacific basin beneath the less dense continental crust of South America. Rising magmas associated with this type of tectonic environment frequently erupt explosively, forming widespread ash and ignimbrite layers. They can also produce less explosive eruptions that form voluminous lava flows – layering together with explosively erupted deposits to build the classic cone-shaped edifice of a stratovolcano over geologic time. The Nevados de Chillan includes three distinct volcanic structures, built within three overlapping calderas that extend along a north-northwest to south-southeast line. The snow-capped volcanic complex sits within the glaciated terrain of the central Andes – glacial valleys are visible at upper left, upper right, and lower right. The northwestern end of the chain is occupied by the 3,212-meter-high Cerro Blanco (also known as Volcan Nevado). The 3,089-meter-high Volcan Viejo (also known as Volcan Chillan) sits at the southeastern end; this volcano was active during the 17th-19th centuries. A group of lava domes known as Volcan Nuevo formed to the northwest of Volcan Viejo between 1906-1945, followed by an even younger dome complex that formed between 1973-1986 (Volcan Arrau; not indicated on the image). The last reported volcanic activity at Nevados de Chillan took place in 2009 (according to the Smithsonian Institution’s Global Volcanism Network).

Inter-nesting movements and habitat-use of adult female Kemp’s ridley turtles in the Gulf of Mexico

PubMed Central

Hart, Kristen M.; Fujisaki, Ikuko; Bucklin, David; Iverson, Autumn R.; Rubio, Cynthia; Backof, Thomas F.; Burchfield, Patrick M.; de Jesus Gonzales Diaz Miron, Raul; Dutton, Peter H.; Frey, Amy; Peña, Jaime; Gomez Gamez, Daniel; Martinez, Hector J.; Ortiz, Jaime

2017-01-01

Species vulnerability is increased when individuals congregate in restricted areas for breeding; yet, breeding habitats are not well defined for many marine species. Identification and quantification of these breeding habitats are essential to effective conservation. Satellite telemetry and switching state-space modeling (SSM) were used to define inter-nesting habitat of endangered Kemp’s ridley turtles (Lepidochelys kempii) in the Gulf of Mexico. Turtles were outfitted with satellite transmitters after nesting at Padre Island National Seashore, Texas, USA, from 1998 through 2013 (n = 60); Rancho Nuevo, Tamaulipas, Mexico, during 2010 and 2011 (n = 11); and Tecolutla, Veracruz, Mexico, during 2012 and 2013 (n = 11). These sites span the range of nearly all nesting by this species. Inter-nesting habitat lies in a narrow band of nearshore western Gulf of Mexico waters in the USA and Mexico, with mean water depth of 14 to 19 m within a mean distance to shore of 6 to 11 km as estimated by 50% kernel density estimate, α-Hull, and minimum convex polygon methodologies. Turtles tracked during the inter-nesting period moved, on average, 17.5 km/day and a mean total distance of 398 km. Mean home ranges occupied were 725 to 2948 km2. Our results indicate that these nearshore western Gulf waters represent critical inter-nesting habitat for this species, where threats such as shrimp trawling and oil and gas platforms also occur. Up to half of all adult female Kemp’s ridleys occupy this habitat for weeks to months during each nesting season. Because inter-nesting habitat for this species is concentrated in nearshore waters of the western Gulf of Mexico in both Mexico and the USA, international collaboration is needed to protect this essential habitat and the turtles occurring within it. PMID:28319178

Detection and characterization of diverse coccidian protozoa shed by California sea lions.

PubMed

Girard, Yvette A; Johnson, Christine K; Fritz, Heather M; Shapiro, Karen; Packham, Andrea E; Melli, Ann C; Carlson-Bremer, Daphne; Gulland, Frances M; Rejmanek, Daniel; Conrad, Patricia A

2016-04-01

Tissue-cyst forming coccidia in the family Sarcocystidae are etiologic agents of protozoal encephalitis in marine mammals including the federally listed Southern sea otter (Enhydra lutris). California sea lions (Zalophus californianus), whose coastal habitat overlaps with sea otters, are definitive hosts for coccidian protozoa provisionally named Coccidia A, B and C. While Coccidia A and B have unknown clinical effects on aquatic wildlife hosts, Coccidia C is associated with severe protozoal disease in harbor seals (Phoca vitulina). In this study, we conducted surveillance for protozoal infection and fecal shedding in hospitalized and free-ranging California sea lions on the Pacific Coast and examined oocyst morphology and phenotypic characteristics of isolates via mouse bioassay and cell culture. Coccidia A and B were shed in similar frequency, particularly by yearlings. Oocysts shed by one free-ranging sea lion sampled at Año Nuevo State Park in California were previously unidentified in sea lions and were most similar to coccidia infecting Guadalupe fur seals (Arctocephalus townsendi) diagnosed with protozoal disease in Oregon (USA). Sporulated Coccidia A and B oocysts did not replicate in three strains of mice or in African green monkey kidney cells. However, cultivation experiments revealed that the inoculum of fecally-derived Coccidia A and B oocysts additionally contained organisms with genetic and antigenic similarity to Sarcocystis neurona; despite the absence of detectable free sporocysts in fecal samples by microscopic examination. In addition to the further characterization of Coccidia A and B in free-ranging and hospitalized sea lions, these results provide evidence of a new role for sea lions as putative mechanical vectors of S. neurona, or S. neurona-like species. Future work is needed to clarify the distribution, taxonomical status, and pathogenesis of these parasites in sea lions and other marine mammals that share their the near-shore marine

Detection and characterization of diverse coccidian protozoa shed by California sea lions

PubMed Central

Girard, Yvette A.; Johnson, Christine K.; Fritz, Heather M.; Shapiro, Karen; Packham, Andrea E.; Melli, Ann C.; Carlson-Bremer, Daphne; Gulland, Frances M.; Rejmanek, Daniel; Conrad, Patricia A.

2015-01-01

Tissue-cyst forming coccidia in the family Sarcocystidae are etiologic agents of protozoal encephalitis in marine mammals including the federally listed Southern sea otter (Enhydra lutris). California sea lions (Zalophus californianus), whose coastal habitat overlaps with sea otters, are definitive hosts for coccidian protozoa provisionally named Coccidia A, B and C. While Coccidia A and B have unknown clinical effects on aquatic wildlife hosts, Coccidia C is associated with severe protozoal disease in harbor seals (Phoca vitulina). In this study, we conducted surveillance for protozoal infection and fecal shedding in hospitalized and free-ranging California sea lions on the Pacific Coast and examined oocyst morphology and phenotypic characteristics of isolates via mouse bioassay and cell culture. Coccidia A and B were shed in similar frequency, particularly by yearlings. Oocysts shed by one free-ranging sea lion sampled at Año Nuevo State Park in California were previously unidentified in sea lions and were most similar to coccidia infecting Guadalupe fur seals (Arctocephalus townsendi) diagnosed with protozoal disease in Oregon (USA). Sporulated Coccidia A and B oocysts did not replicate in three strains of mice or in African green monkey kidney cells. However, cultivation experiments revealed that the inoculum of fecally-derived Coccidia A and B oocysts additionally contained organisms with genetic and antigenic similarity to Sarcocystis neurona; despite the absence of detectable free sporocysts in fecal samples by microscopic examination. In addition to the further characterization of Coccidia A and B in free-ranging and hospitalized sea lions, these results provide evidence of a new role for sea lions as putative mechanical vectors of S. neurona, or S. neurona-like species. Future work is needed to clarify the distribution, taxonomical status, and pathogenesis of these parasites in sea lions and other marine mammals that share their the near-shore marine

Study for the selection of optimal site in northeastern, Mexico for wind power generation using genetic algorithms.

NASA Astrophysics Data System (ADS)

Gonzalez, T.; Ruvalcaba, A.; Oliver, L.

2016-12-01

The electricity generation from renewable resources has acquired a leading role. Mexico particularrly it has great interest in renewable natural resources for power generation, especially wind energy. Therefore, the country is rapidly entering in the development of wind power generators sites. The development of a wind places as an energy project, does not have a standardized methodology. Techniques vary according to the developer to select the best place to install a wind turbine system. Generally to install the system the developers consider three key factors: 1) the characteristics of the wind, 2) the potential distribution of electricity and 3) transport access to the site. This paper presents a study with a different methodology which is carried out in two stages: the first at regional scale uses "space" and "natural" criteria in order to select a region based on its cartographic features such as politics and physiographic division, location of conservation natural areas, water bodies, urban criteria; and natural criteria such as the amount and direction of the wind, the type and land use, vegetation, topography and biodiversity of the site. The result of the application of these criteria, gives a first optimal selection area. The second part of the methodology includes criteria and variables on detail scale. The analysis of all data information collected will provide new parameters (decision variables) for the site. The overall analysis of the information, based in these criteria, indicates that the best location that the best location of the field would be the southern Coahuila and the central part of Nuevo Leon. The wind power site will contribute to the economy grow of important cities including Monterrey. Finally, computational model of genetic algorithm will be used as a tool to determine the best site selection depending on the parameters considered.

Inter-nesting movements and habitat-use of adult female Kemp's ridley turtles in the Gulf of Mexico.

PubMed

Shaver, Donna J; Hart, Kristen M; Fujisaki, Ikuko; Bucklin, David; Iverson, Autumn R; Rubio, Cynthia; Backof, Thomas F; Burchfield, Patrick M; de Jesus Gonzales Diaz Miron, Raul; Dutton, Peter H; Frey, Amy; Peña, Jaime; Gomez Gamez, Daniel; Martinez, Hector J; Ortiz, Jaime

2017-01-01

Species vulnerability is increased when individuals congregate in restricted areas for breeding; yet, breeding habitats are not well defined for many marine species. Identification and quantification of these breeding habitats are essential to effective conservation. Satellite telemetry and switching state-space modeling (SSM) were used to define inter-nesting habitat of endangered Kemp's ridley turtles (Lepidochelys kempii) in the Gulf of Mexico. Turtles were outfitted with satellite transmitters after nesting at Padre Island National Seashore, Texas, USA, from 1998 through 2013 (n = 60); Rancho Nuevo, Tamaulipas, Mexico, during 2010 and 2011 (n = 11); and Tecolutla, Veracruz, Mexico, during 2012 and 2013 (n = 11). These sites span the range of nearly all nesting by this species. Inter-nesting habitat lies in a narrow band of nearshore western Gulf of Mexico waters in the USA and Mexico, with mean water depth of 14 to 19 m within a mean distance to shore of 6 to 11 km as estimated by 50% kernel density estimate, α-Hull, and minimum convex polygon methodologies. Turtles tracked during the inter-nesting period moved, on average, 17.5 km/day and a mean total distance of 398 km. Mean home ranges occupied were 725 to 2948 km2. Our results indicate that these nearshore western Gulf waters represent critical inter-nesting habitat for this species, where threats such as shrimp trawling and oil and gas platforms also occur. Up to half of all adult female Kemp's ridleys occupy this habitat for weeks to months during each nesting season. Because inter-nesting habitat for this species is concentrated in nearshore waters of the western Gulf of Mexico in both Mexico and the USA, international collaboration is needed to protect this essential habitat and the turtles occurring within it.

Que hay de nuevo acerca de la inmersion? Un Breve Recorrido por sus Fundamentos y por las Investigaciones Actuales (What's New in Immersion? A Brief Overview of Its Bases and Present-Day Research).

ERIC Educational Resources Information Center

Sierra, Josu

This discussion briefly surveys the development of the immersion method of second language teaching, outlining the central program strategies and characteristics using Curtain's and Pesola's descriptions. An overview of recent research focuses on error correction and feedback studies as an example of pedagogical-methodological evolution in this…

A quantitative synthesis of the medicinal ethnobotany of the Malinké of Mali and the Asháninka of Peru, with a new theoretical framework

PubMed Central

Bletter, Nathaniel

2007-01-01

from around the world to pinpoint the species with the highest potential efficacy to take into the laboratory and analyze further, ultimately saving much field and laboratory time and resources. Spanish abstract Las búsquedas que utilizan la etnomedicina y la taxonomía para descubrir nuevas plantas medicinales, pueden aumentar la probabilidad de éxito de encontrar compuestos químicos activos en plantas, en comparación con las búsquedas aleatorias. A pesar de lo anterior, en las últimas décadas, la etnobotánica no ha cumplido con las expectativas de proveer numerosas plantas medicinales y químicos nuevos una vez examinados en el laboratorio. Cada año se describen una plétora de plantas medicinales y sus usos, sin embargo las limitaciones de tiempo y recursos en los laboratorios, unidos al alto coste de los ensayos clínicos de las drogas potenciales, hacen muy difícil probar, aislar, y elucidar la estructura y el mecanismo de los compuestos de estas plantas. Se propone un nuevo marco teórico cuantitativo cuyo fin es focalizar la búsqueda de nueva plantas medicinales. Este marco teórico está basado en la hipótesis que las plantas cercanamente relacionadas, usadas para tratar enfermedades cercanamente relacionadas en culturas distantemente relacionadas, tienen una eficacia potencial más alta, debido a que es más probable que estos hallazgos sean descubrimientos independientes de compuestos químicos similares. Parte de esta hipótesis, que las escogencias racionales se hacen para elegir plantas medicinales similares y que la flora medicinal de dos culturas distantes es más similar que su flora general, se probó usando métodos estadísticos de remuestreo con datos de campo de la comunidad Malinké de Malí y de la Asháninka de Perú, y las enfermedades de paludismo, enfermedad africana del sueño, enfermedad de Chagas, leishmania, diabetes, eczema, asma, y fibromas uterinos. Se encontró, en este caso, que la similitud de las floras medicinales es

Un Nuevo Convenio para el Aprendizaje: Una Sociedad para Mejorar los Resultados Educativos en el Estado de Nueva York (A New Compact for Learning: A Partnership To Improve Educational Results in New York State).

ERIC Educational Resources Information Center

New York State Education Dept., Albany. Office of Elementary, Middle and Secondary Education.

This Spanish translation of the abridged version of "A New Compact for Learning" acknowledges the current U.S. education system's inadequacy to educate U.S. citizenry and introduces New York State's New Compact for Learning, intended as a plan to reorganize New York's own system. The compact's fundamental principles are: (1) recognizing…

Modelizacion, control e implementacion de un procesador energetico paralelo para aplicacion en sistemas multisalida

NASA Astrophysics Data System (ADS)

Ferreres Sabater, Agustin

modelizacion, y aplicacion en convertidores PWM, esta aun por estudiar y valorar. El primer Capitulo consiste en una breve introduccion al problema de la regulacion cruzada y la impedancia cruzada para posteriormente describir las tecnicas de post-regulacion actualmente mas empleadas, con especial atencion al post-regulador con transformador controlado. El Capitulo segundo trata del estudio de las caracteristicas estaticas del postregulador con transformador controlado. Partiendo de los estudios disponibles sobre el postregulador se plantean mejoras en su modo de actuacion y se discuten tres alternativas diferentes para controlar el transformador. Las dos primeras consisten en emplear un convertidor auxiliar Boost en sus dos modos de funcionamiento, continuo y discontinuo. La tercera consiste en controlar el transformador con una tension PWM directamente, sin filtrado. Finalmente se comprueba experimentalmente, para el estado estacionario, el funcionamiento del post-regulador para cada uno de los tres metodos de control. El Capitulo tercero trata de la dinamica de la salida controlada con el post-regulador cuando este emplea un convertidor auxiliar tipo Boost. Mediante la tecnica de promediado de variables de estado se propone el modelo de pequena senal, tanto para el modo continuo como para el modo discontinuo de funcionamiento del convertidor auxiliar. Los resultados mas significativos de esta seccion son las expresiones analiticas de las impedancias cruzadas y de la impedancia de la salida post-regulada. Como complemento al modelo de pequena senal se plantea un modelo de gran senal implementado sobre el simulador Pspice. Con este nuevo modelo se reproducen los resultados obtenidos con el modelo de pequena senal y ademas es posible simular los transitorios en las tensiones de salida ante cambios de carga. La modelizacion del convertidor cuando el transformador se controla con una tension PWM sin filtrar es el objetivo del Capitulo 4. En las secciones siguientes del Capitulo

Apparent Motion of the Sun, Shadows of Objects and Measurement of Time in the View of Seventh Grade Students of Middle School. (Breton Title: Movimento Aparente do Sol, Sombras dos Objetos e Medição do Tempo na Visão de Alunos do Sétimo Ano do Ensino Fundamental.) Movimiento Aparente del Sol, Sombras de los Objetos y Medición del Tiempo en la Visión de Estudiantes del Séptimo Grado del Ciclo Pirmario

NASA Astrophysics Data System (ADS)

Iria Machado, Daniel

2013-07-01

analemático, conduzida por um monitor. Uma proporção significativa de estudantes desconhecia inicialmente a maioria dos fenômenos tratados. A intervenção realizada colaborou para uma parte dos alunos assimilar novos conceitos, propiciando o contato com novos fenômenos e, em menor grau, a elaboração de explicações a respeito destes, indicando um potencial educativo dessa ação. Porém, a contribuição para o entendimento de algumas das ideias exploradas foi pequena, apontando para a necessidade de se fazer observações, estudos e discussões complementares. El movimiento aparente del Sol en la esfera celeste y el comportamiento de las sombras de los objetos a lo largo del tiempo son fenómenos observables en la vida cotidiana. Sin embargo, los estudiantes a menudo no tienen una adecuada comprensión de dichos problemas, e incluso pueden mostrar conceptos erróneos acerca de ellos. Por lo tanto, se realizó una investigación a fin de conocer las nociones de los estudiantes acerca de estas cuestiones y evaluar la contribución a su comprensión proporcionada por una actividad realizada con un reloj de Sol interactivo, en un entorno informal de aprendizaje. Se investigaron las ideas de 43 estudiantes del séptimo grado del ciclo primario mediante la aplicación de un test con preguntas abiertas antes y después de una actividad con un reloj de Sol analemático, dirigida por un monitor. Una proporción significativa de los estudiantes inicialmente desconocía la mayoría de los fenómenos tratados. La intervención realizada contribuyó para que los estudiantes asimilasen nuevos conceptos, proporcionando el contacto con nuevos fenómenos y, en menor medida, desarrollasen explicaciones acerca de estos, lo que indica un potencial educativo de esta acción. Sin embargo, la contribución a la comprensión de algunas de las ideas exploradas fue pequeña, lo que apunta a la necesidad de hacer observaciones, estudios y debates adicionales.

Resultados do desenvolvimento de um propulsor à plasma no Brasil

NASA Astrophysics Data System (ADS)

Ferreira, I. S.; Ferreira, J. L.

2003-08-01

Uma das partes mais importantes de um satélite é o controle de atitude do mesmo. E se tratando de um satélite científico, a atenção para este sistema deve ser redobrada. Uma possibilidade atraente para executar esta tarefa é a propulsão elétrica. Aqui, mostraremos resultados obtidos pelo propulsor à plasma PHALL-01, desenvolvido na Universidade de Brasília entre 2000 e 2003. Este é derivado do propulsor russo SPT-100 (Stationary Plasma Thruster), mas com o emprego inovador de um arranjo de imãs permanentes como fonte do campo magnético, este último o agente da aceleração do plasma. Esta alteração foi motivada pelo objetivo de que o mesmo operasse com o mínimo de potência elétrica. A partir da formulação teórica do mecanismo de aceleração, tendo como base as equações da magnetohidrodinâmica, pode-se obter vínculos sob os quais o propulsor pudesse ser construído. O mais forte destes é o que dita a topologia do campo magnético. Sendo assim, foram realizadas simulações computacionais, que definiram a geometria do propulsor. Após construído, este foi diagnosticado usando-se sondas de Langmuir e analisadores de energia. Como resultados, obtivemos a distribuição espacial da temperatura, densidade e potencial do plasma, bem como a distribuição angular do feixe produzido pelo mesmo em vários regimes de operação. O espectro de energia do feixe de plasma também foi medido, indicando íons de até 560eV. Combinando estes resultados, calculou-se o empuxo do propulsor: 84mN; e o impulso específico: 1083s. Estes demonstram que o mesmo estará qualificado, num futuro próximo, para o emprego no controle de atitude de satélites científicos, ou até mesmo como parte do conjunto propulsor primário, responsáveis pela transferência de órbitas.

PubMed

Torrado, Julio; Piazuelo, María Blanca; Ruiz, Irune; Izarzugaza, María Isabel; Camargo, María Constanza; Delgado, Alberto; Abdirad, Afshin; Correa, Pelayo

2010-01-01

ANTECEDENTES: El esófago de Barrett es una reconocida lesión precursora de adenocarcinoma esofágico. Aunque generalmente asociada al reflujo gastroesofágico, los mecanismos patogénicos de la enfermedad no son bien conocidos. El objetivo del presente estudio es explorar la historia natural e identificar marcadores de progreso del proceso precanceroso. MATERIAL Y M#ENTITYSTARTX000E9;TODOS: Se utilizaron cortes histológicos de 67 especímenes de esófago correspondientes a 14 pacientes con esófago de Barrett, a los que se siguió entre 1 - 9 años. Se clasificaron las lesiones en: esófago de Barrett sin displasia, indefinido para displasia o con displasia. Se evaluó la expresión de diferentes mucinas en las células caliciformes y en las columnares usando técnicas de histoquímica e inmunohistoquímica. RESULTADOS: En todos los casos se comprobó la presencia de metaplasia intestinal incompleta. Las células columnares dentro del epitelio metaplásico contenían mucinas neutras. A mayor severidad de la lesión se encontró significativamente menor expresión de sialomucinas en las células columnares (p de tendencia igual a 0,03). En sujetos con lesiones indefinidas para displasia se observó un mayor contenido de sulfomucinas en las células caliciformes (p=0,034) y de MUC2 en las células columnares (p=0,029) que en sujetos con esófago de Barrett sin displasia. Se observó expresión de la mucina intestinal MUC2 y de la mucina gástrica MUC5AC en todas las muestras. MUC6, una mucina de las glándulas profundas gástricas, se presentó ocasionalmente. CONCLUSI#ENTITYSTARTX000F3;N: La evaluación de los perfiles de mucinas en el esófago de Barrett sugiere una transición gradual del fenotipo del epitelio metaplásico a medida que la lesión avanza en el tiempo.

El fenotipo de las mucinas en el esófago de Barrett

PubMed Central

Torrado, Julio; Piazuelo, María Blanca; Ruiz, Irune; Izarzugaza, María Isabel; Camargo, María Constanza; Delgado, Alberto; Abdirad, Afshin; Correa, Pelayo

2011-01-01

Antecedentes El esófago de Barrett es una reconocida lesión precursora de adenocarcinoma esofágico. Aunque generalmente asociada al reflujo gastroesofágico, los mecanismos patogénicos de la enfermedad no son bien conocidos. El objetivo del presente estudio es explorar la historia natural e identificar marcadores de progreso del proceso precanceroso. Material y métodos Se utilizaron cortes histológicos de 67 especímenes de esófago correspondientes a 14 pacientes con esófago de Barrett, a los que se siguió entre 1 – 9 años. Se clasificaron las lesiones en: esófago de Barrett sin displasia, indefinido para displasia o con displasia. Se evaluó la expresión de diferentes mucinas en las células caliciformes y en las columnares usando técnicas de histoquímica e inmunohistoquímica. Resultados En todos los casos se comprobó la presencia de metaplasia intestinal incompleta. Las células columnares dentro del epitelio metaplásico contenían mucinas neutras. A mayor severidad de la lesión se encontró significativamente menor expresión de sialomucinas en las células columnares (p de tendencia igual a 0,03). En sujetos con lesiones indefinidas para displasia se observó un mayor contenido de sulfomucinas en las células caliciformes (p=0,034) y de MUC2 en las células columnares (p=0,029) que en sujetos con esófago de Barrett sin displasia. Se observó expresión de la mucina intestinal MUC2 y de la mucina gástrica MUC5AC en todas las muestras. MUC6, una mucina de las glándulas profundas gástricas, se presentó ocasionalmente. Conclusión La evaluación de los perfiles de mucinas en el esófago de Barrett sugiere una transición gradual del fenotipo del epitelio metaplásico a medida que la lesión avanza en el tiempo. PMID:21804831

Traumatismo craneoencefálico leve

PubMed Central

Ortega Zufiría, José Manuel; Prieto, Noemí Lomillos; Cuba, Bernardino Choque; Degenhardt, Martin Tamarit; Núñez, Pedro Poveda; López Serrano, María Remedios; López Raigada, Azahara Belén

2018-01-01

Resumen Introducción y objetivo: El TCE leve representa un problema sanitario de enorme interés debido a que un número significativo de enfermos con trauma leve desarrollará complicaciones potencialmente mortales. El objetivo de este estudio ha sido describir una serie amplia de pacientes adultos, mayores de 14 años, que sufren TCE leve, atendidos en el Hospital Universitario de Getafe, entre los años 2010 y 2015 (n = 2480), estudiar el perfil epidemiológico y analizar el diagnóstico y el tratamiento efectuados, así como establecer los principales factores pronósticos que influyen en el resultado final. Método: Se ha realizado un estudio retrospectivo, de revisión de historias clínicas, analizando los resultados con estudio estadístico bivariable y multivariable. Resultados: El TCE leve es más frecuente en varones, y el mecanismo causante más común en nuestro medio es el accidente de tráfico. Se propone un modelo de clasificación de pacientes según grupos de riesgo, que los subdivide en riesgo bajo, intermedio o alto, que se correlaciona bien con la probabilidad de desarrollar complicación intracraneal, y, consecuentemente, con el resultado final. Se discute la indicación de la radiografía simple de cráneo y de la Tomografía Computarizada (TC), así como del ingreso hospitalario para observación neurológica. Conclusiones: En este estudio, la presencia de focalidad neurológica en la exploración clínica, la edad, las alteraciones de la coagulación y la existencia de fractura en la radiografía simple se relacionan con mayor posibilidad de desarrollar lesiones traumáticas intracraneales y con peor pronóstico final. La escala de Glasgow para el Coma es deficitaria en la determinación del resultado final del paciente que sufre TCE, porque no considera variables tales como la amnesia o la pérdida de conocimiento, muy frecuentes en el traumatismo craneoencefálico leve. PMID:29430327

A atuação do Observatório Nacional registrada nos relatórios ministeriais 1889 a 1930

NASA Astrophysics Data System (ADS)

Rodrigues, T.

2003-08-01

O período republicano até 1930 foi marcante na história do Observatório Nacional. Diversas reformas levaram a instituição a três ministérios diferentes e mudaram a ênfase do seu trabalho. A tão aguardada mudança para uma nova sede, em São Cristóvão, em 1920, não foi suficiente para que a instituição acompanhasse o ritmo tomado pela astronomia no mundo e se firmasse como ambiente de pesquisa. Uma análise simplificada poderia caracterizar um período de produção científica insignificante, dado o distanciamento da instituição dos novos rumos da astrofísica e da rápida inovação dos instrumentos, além do pequeno volume de publicações. Era uma época em que ainda não existiam os mecanismos formais de apoio e avaliação da atividade científica. Esse trabalho procura identificar a real atividade do Observatório no conteúdo dos Relatórios Ministeriais que, ao final de cada ano, apresentava as atividades, sucessos e problemas enfrentados pela instituição. Questões como instrumental e recursos humanos necessários; entraves burocráticos e financeiros; e articulações com outros observatórios se complementaram entre si ao longo desses anos para definir o perfil institucional e alguns aspectos fundamentais para a construção da astronomia no país. É possível concluir que a ênfase em serviços geográficos e de meteorologia, ao lado da inadequação dos instrumentos e do local, quase fizeram desaparecer a pesquisa em astronomia. Porém, vale destacar a sobrevivência de alguns trabalhos, como, por exemplo, variação de latitude e observação de estrelas duplas que mantiveram importante intercâmbio com outros grupos de pesquisa, demonstrando o constante esforço dos astrônomos e das diretorias em defesa da atividade científica.

Evolução temporal de discos circunstelares em estrelas Be

NASA Astrophysics Data System (ADS)

Fernandes, M. V. M.; Leister, N. V.; Levenhagen, R. S.

2003-08-01

A pesquisa do mecanismo que leva uma estrela do tipo Be a perder massa e formar um envelope circunstelar, nomeado como fenômeno Be, é uma questão em aberto, intrigante, e que adquire contornos interessantes em face às informações espectroscópicas de alta resolução. Nesta última década, consolida-se a idéia de que a forma destes envelopes é de tipo discóide, obedecendo a uma lei Kepleriana de velocidades, e mais ainda, recentemente há evidências de que a distribuição de matéria nestes discos pode assumir um caráter de anel. Medidas de algumas dimensões de discos circunstelares puderam ser obtidas pela análise de espectros de alta resolução e alta relação sinal-ruído para as estrelas Be: alpha Eri (HD 10144, B3Vpe), omicron And (HD 217675, B6IIIpe), e eta Cen (HD el972, B1.5Vne), no período dos anos de 1991 a 2001. Alguns modelos clássicos de envelope predizem uma distribuição de massa que decresce suavemente a partir da superfície estelar. Entretanto, considerando que a separação de picos de emissão em perfis de linhas do HeI e H-alpha, alargados por efeitos cinemáticos, é função do raio estelar e da velocidade rotacional projetada (vsini); nossos resultados sugerem a presença de um anel de matéria circunstelar, que aparece logo após a ejeção do material fotosférico, imediatamente acima da superfície estelar, e que se expande para raios maiores ao longo do tempo, eventualmente desconectando-se da superfície por uma região de densidade de matéria mínima. Tais interpretações revivem a idéia de que anéis de matéria circunstelar podem ser os responsáveis por algumas variabilidades em perfis de linhas de emissão, como as variações V/R.