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Sample records for luis potos mxico

  1. Rotavirus epidemiology in San Luis Potosí, Mexico.

    PubMed

    Noyola, Daniel E; Herrera, Ismael F

    2005-07-01

    The epidemiology of rotavirus infections was investigated in San Luis Potosí, Mexico during a 6-year period. In each of the study years, the epidemic period started in October or November; peak activity was detected between December and February, and the end of the epidemic occurred in March or April. Rotavirus infections show a consistent temporal pattern in our community.

  2. Epidemiology of Bordetella pertussis in San Luis Potosí, Mexico.

    PubMed

    Ochoa-Perez, Uciel R; Hernández-Sierra, Juan F; Escalante-Padrón, Francisco J; Contreras-Vidales, Soledad; Berman-Puente, Ana M; Hernandez-Maldonado, Fernando; Noyola, Daniel E

    2014-05-01

    We analyzed data from 147 patients with suspected pertussis in San Luis Potosí, Mexico. Bordetella pertussis was detected by real-time polymerase chain reaction in 59 (40.1%) cases. The incidence of B. pertussis infection was 2.3 per 100,000 population. There were 6 deaths among the study patients. We conclude that the impact of pertussis in our state is significantly higher than previously estimated.

  3. Superinfection between influenza and RSV alternating patterns in San Luis Potosí State, México.

    PubMed

    Velasco-Hernández, Jorge Xicoténcatl; Núñez-López, Mayra; Comas-García, Andreu; Cherpitel, Daniel Ernesto Noyola; Ocampo, Marcos Capistrán

    2015-01-01

    The objective of this paper is to explain through the ecological hypothesis superinfection and competitive interaction between two viral populations and niche (host) availability, the alternating patterns of Respiratory Syncytial Virus (RSV) and influenza observed in a regional hospital in San Luis Potosí State, México using a mathematical model as a methodological tool. The data analyzed consists of community-based and hospital-based Acute Respiratory Infections (ARI) consultations provided by health-care institutions reported to the State Health Service Epidemiology Department from 2003 through 2009.

  4. Superinfection between Influenza and RSV Alternating Patterns in San Luis Potosí State, México

    PubMed Central

    Velasco-Hernández, Jorge Xicoténcatl; Núñez-López, Mayra; Comas-García, Andreu; Cherpitel, Daniel Ernesto Noyola; Ocampo, Marcos Capistrán

    2015-01-01

    The objective of this paper is to explain through the ecological hypothesis superinfection and competitive interaction between two viral populations and niche (host) availability, the alternating patterns of Respiratory Syncytial Virus (RSV) and influenza observed in a regional hospital in San Luis Potosí State, México using a mathematical model as a methodological tool. The data analyzed consists of community-based and hospital-based Acute Respiratory Infections (ARI) consultations provided by health-care institutions reported to the State Health Service Epidemiology Department from 2003 through 2009. PMID:25803450

  5. KIR gene diversity in Mexican mestizos of San Luis Potosí.

    PubMed

    Alvarado-Hernández, Diana Lorena; Hernández-Ramírez, Daniel; Noyola, Daniel Ernesto; García-Sepúlveda, Christian Alberto

    2011-09-01

    Natural killer (NK) cell function is regulated by different types of membrane-bound receptors of which killer-cell immunoglobulin-like receptors (KIRs) are the most complex and diverse. KIRs are encoded by 17 different genes located within the leukocyte receptor complex (19q13.4). The frequency with which KIR gene features are present in different human populations differs. Here, we present our results on the KIR gene diversity observed in a large group of mestizos from the central Mexican city of San Luis Potosí. In total, 53 different KIR genotypes were observed, 47 with previously described gene profiles and six harboring novel KIR gene combinations. Group A homozygous haplotypes were seen in 102 individuals (34%), while group B homozygous haplotypes were present in 45 (15%). Heterozygous combinations of groups A and B haplotypes were seen in 153 individuals (51%). Haplotype frequency estimations based on a true content of 600 chromosomes showed a relatively balanced proportion of group A (59.5%) and group B (40.5%) haplotypes in our study population. A homozygous combination of the cA01|tA01 haplotype was present in 33% of the population with other frequent combinations being cA01|tA01, cB03|tB01 in 14.7% and cA01|tA01, cB02|tA01 in 12%. The dendrogram derived from activating KIR gene phylogenetic analysis revealed five clearly distinct clades corresponding to African, East Asian, Arab/Caucasoid, Mexican mestizo/Amerindian and South Asian populations. Our results illustrate the genetic contribution that Caucasoid and Amerindian populations have made toward present-day Mexicans and suggest an important Southeast Asian genetic contribution to native Amerindian populations.

  6. Severe pneumonia associated with pandemic (H1N1) 2009 outbreak, San Luis Potosí, Mexico.

    PubMed

    Gómez-Gómez, Alejandro; Magaña-Aquino, Martin; Garcia-Sepúlveda, Christian; Ochoa-Pérez, Uciel R; Falcón-Escobedo, Reynaldo; Comas-García, Andreu; Aranda-Romo, Saray; Contreras-Treviño, Hugo I; Jimenéz-Rico, Paulina V; Banda-Barbosa, Mario A; Dominguez-Paulin, Félix; Bernal-Blanco, J Mario; Peréz-González, Luis F; Noyola, Daniel E

    2010-01-01

    We describe the clinical characteristics and outcomes of adults hospitalized with pneumonia during the pandemic (H1N1) 2009 outbreak. Patients admitted to a general hospital in San Luis Potosí, Mexico, from April 10 through May 11, 2009, suspected to have influenza virus-associated pneumonia were evaluated. We identified 50 patients with suspected influenza pneumonia; the presence of influenza virus was confirmed in 18: 11 with pandemic (H1N1) 2009 virus, 5 with unsubtypeable influenza A virus, 1 with seasonal influenza A virus (H3N2), and 1 in whom assay results for seasonal and pandemic (H1N1) 2009 viruses were positive. Eighteen patients were treated in the intensive care unit, and 10 died. During the pandemic (H1N1) 2009 outbreak, severe pneumonia developed in young adults who had no identifiable risk factors; early diagnosis and treatment of influenza virus infections may have a determinant role in outcome.

  7. Hydrovolcanic evolution of the Joya Prieta maar, San Luis Potosí, northeast Mexico

    NASA Astrophysics Data System (ADS)

    Davila-Harris, P.; Aranda-Gomez, J. J.; Carrasco, G.

    2013-05-01

    The Joya Prieta is a Quaternary maar volcano emplaced at the western sector of the Sierra Madre Oriental fold and thrust belt. The crater is located at the axis of an open Laramide fold with a N20°W axis trend. It is the most easterly structure of the Santo Domingo Group, a cluster of intraplate maars and tuff-rings northeast of San Luis Potosí. A characteristic feature of these maars is that they are emplaced in close relationship with anticlines, exposing impressive inner crater walls of folded strata. In the Joya Prieta maar, the calcareous basement rocks are clearly exposed and unconformably overlain by the volcanic succession. A generalized stratigraphic sequence registers, from base to top, olivine-bearing basalt lava resting unconformably atop El Abra Formation limestone. The lava is overlain by thick and oxidized scoria and spatter agglomerate that grades into a moderately sorted spatter-fall layer with pervasive palagonite alteration. In direct contact with no evidence of reworking, pedogenesis or remobilization, the maar-forming sequence starts with parallel-stratified fall layers of altered basaltic pumice and scoria, with lava and limestone lithic clasts. This fall deposit marks the influx of xenocrystals and xenoliths, widely documented in previous works; they comprise mainly kaersutite mega crystals and spinel lherzolite respectively. The proximal fall deposit is divided into two thick layers by an indurated ash-tuff bed with pellets and single-rimmed accretionary lapilli. The upper layer of this fall deposit passes gradually onto an alternation of lapilli-sized layers with parallel ash-tuff horizons until it grades into cross-stratified, lithic-rich lapilli-tuff. The heterolithologic lapilli tuff is cemented on a fine ash matrix with palagonized juvenile clasts and abundant lava, shale and limestone lithics exhibiting a plethora of lithofacies in the like of parallel-bedded tuff, low-angle cross-bedded tuff and massive strata. This passes gradually

  8. Mortality attributable to pandemic influenza A (H1N1) 2009 in San Luis Potosí, Mexico

    PubMed Central

    Comas‐García, Andreu; García‐Sepúlveda, Christian A.; Méndez‐de Lira, José J.; Aranda‐Romo, Saray; Hernández‐Salinas, Alba E.; Noyola, Daniel E.

    2010-01-01

    Please cite this paper as: Comas‐García et al. (2011) Mortality attributable to pandemic influenza A (H1N1) 2009 in San Luis Potosí, Mexico. Influenza and Other Respiratory Viruses 5(2), 76–82. Background  Acute respiratory infections are a leading cause of morbidity and mortality worldwide. Starting in 2009, pandemic influenza A(H1N1) 2009 virus has become one of the leading respiratory pathogens worldwide. However, the overall impact of this virus as a cause of mortality has not been clearly defined. Objectives  To determine the impact of pandemic influenza A(H1N1) 2009 on mortality in a Mexican population. Methods  We assessed the impact of pandemic influenza virus on mortality during the first and second outbreaks in San Luis Potosí, Mexico, and compared it to mortality associated with seasonal influenza and respiratory syncytial virus (RSV) during the previous winter seasons. Results  We estimated that, on average, 8·1% of all deaths that occurred during the 2003–2009 seasons were attributable to influenza and RSV. During the first pandemic influenza A(H1N1) 2009 outbreak, there was an increase in mortality in persons 5–59 years of age, but not during the second outbreak (Fall of 2009). Overall, pandemic influenza A (H1N1) 2009 outbreaks had similar effects on mortality to those associated with seasonal influenza virus epidemics. Conclusions  The impact of influenza A(H1N1) 2009 virus on mortality during the first year of the pandemic was similar to that observed for seasonal influenza. The establishment of real‐time surveillance systems capable of integrating virological, morbidity, and mortality data may result in the timely identification of outbreaks so as to allow for the institution of appropriate control measures to reduce the impact of emerging pathogens on the population. PMID:21306570

  9. Concentrations of persistent organic pollutants (POPs) and heavy metals in soil from San Luis Potosí, México.

    PubMed

    Perez-Vazquez, Francisco Javier; Flores-Ramirez, Rogelio; Ochoa-Martinez, Angeles Catalina; Orta-Garcia, Sandra Teresa; Hernandez-Castro, Berenice; Carrizalez-Yañez, Leticia; Pérez-Maldonado, Iván N

    2015-01-01

    The aim of this study was to assess the levels of polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), p,p'-dichlorodiphenyltrichloroethane (DDT), p,p'-dichlorodiphenyldichloroethylene (DDE), and four heavy metals (arsenic, cadmium, lead, and mercury) in soil from the city of San Luis Potosí in Mexico. In order to confirm the presence of the previously mentioned compounds, outdoor surface soil samples were collected and analyzed by gas chromatography/mass spectrometer for PBDEs, PCBs, DDT, and DDE. Meanwhile, heavy metals were quantified using the atomic absorption spectrophotometry technique. The total PBDEs levels ranged from 5.0 to 134 μg/kg dry weight (dw), with a total mean PBDEs level of 22.0 ± 32.5 μg/kg dw (geometric mean ± standard deviation). For PCBs, the total mean level in the studied soil was 21.6 ± 24.7 μg/kg dw (range, Luis Potosí, Mexico, and considering that soil is an important pathway of exposure for people, a biomonitoring program for the surveillance of the general population in the city of San Luis Potosi is necessary.

  10. [Violence against women in transnational communities in San Luis Potosí, Mexico: a public health problem].

    PubMed

    Flores, Yesica Yolanda Rangel

    2016-08-01

    Violence against women is a worldwide problem due to its impact on quality of life for those living under the complicity of a patriarchal culture and a state that makes such violence invisible. This article aims to give visibility to the contexts of violence affecting female "partners of migrants" in their places of origin, problematizing how such violence assaults their physical and mental health. This was a qualitative study with an interpretative anthropological focus, drawing on a sample of 21 women from rural and urban areas in San Luis Potosí, Mexico. Interviews were based on daily life history and discourse analysis. According to the results, women experience more violence when their spouses migrate, new forms of violence are committed against them, and the violence occurs in both the household and the community. Violence against women is a public health problem that should be treated through a framework that is sensitive to the social and cultural dynamics characterizing the contexts in which health programs are implemented. PMID:27487439

  11. [Violence against women in transnational communities in San Luis Potosí, Mexico: a public health problem].

    PubMed

    Flores, Yesica Yolanda Rangel

    2016-08-01

    Violence against women is a worldwide problem due to its impact on quality of life for those living under the complicity of a patriarchal culture and a state that makes such violence invisible. This article aims to give visibility to the contexts of violence affecting female "partners of migrants" in their places of origin, problematizing how such violence assaults their physical and mental health. This was a qualitative study with an interpretative anthropological focus, drawing on a sample of 21 women from rural and urban areas in San Luis Potosí, Mexico. Interviews were based on daily life history and discourse analysis. According to the results, women experience more violence when their spouses migrate, new forms of violence are committed against them, and the violence occurs in both the household and the community. Violence against women is a public health problem that should be treated through a framework that is sensitive to the social and cultural dynamics characterizing the contexts in which health programs are implemented.

  12. Comprehensive Paleomagnetic Study of the Oligocene-Miocene Rocks from the San Luis Potosí Volcanic Field, Mexico

    NASA Astrophysics Data System (ADS)

    Alva-Valdivia, L. M.; Gonzalez-Rangel, J. A.; Torres-Hernandez, J. R.

    2014-12-01

    Comprehensive paleomagnetic study of the Oligocene-Miocene sequence of lithological units from the San Luis Potosí volcanic field in central Mexico was accomplished to set up the magnetostratigraphic record. Two hundred and one oriented standard paleomagnetic cores corresponding to twenty-eight paleomagnetic sites were collected from all units. Rock-magnetic properties are characteristic for each unit. Isothermal remanent magnetization acquisition curves and continuous susceptibility vs. temperature experiments point from low to medium-Ti content in titanomagnetite as the main opaque magnetic minerals, presumably result from oxy-exsolution processes during the initial flow cooling. Opaque mineral microscopy supports this assumption. Unblocking temperature and hysteresis parameters suggests predominance of pseudo-single domain magnetic grain size. Thermal and alternating field demagnetizations show mostly well-defined univectorial magnetizations. Most sites present a mean direction with small angular dispersion. The overall mean direction (N=10, Dec=1.1°, Inc=34.1°, k=531 and α95=2.1°) is characterized by small angular dispersion and inclination close to dipolar value for the locality. Anisotropy of magnetic susceptibility lineation match the geologically inferred flow direction.

  13. Analysis of the Magnetic Susceptibility Anisotropy of the Cantera Ignimbrite, San Luis Potosé­ Volcanic field, Mexico

    NASA Astrophysics Data System (ADS)

    Caballero, C.; Torres-Hernandez, J.; Alva-Valdivia, L. M.

    2007-05-01

    Anisotropy of Magnetic Susceptibility (AMS) results from a group of 17 - 18 sites (286 - 312 specimens) from the Cantera Ignimbrite - of Oligocene age and part of the San Luis Potosí Volcanic Filed (SLPVF), México - are presented and analysed in order to help to determine the source and flow directions. In each site a flow direction is inferred based on AMS results. As the Cantera Ignimbrite is generally dipping, AMS was structural corrected. So two sets of geographical and paleo-geographical (structural corrected) inferred-flow directions were obtained. Both sets are analysed trying to define if the source of the ignimbrite is related to a calderic (concentric structure) or to the NW-SE faulting and jointing. Geographical AMS results mostly give SW flow directions, the southernmost sites give to SSE. Meanwhile structural corrected results give a wider range of flow directions, a group of them to NW and another northerly group mostly to NE. AMS was measured in a KLY2 appliance, Jelinek and other statistics and density distributions were performed, giving all very similar results in each site. Mean susceptibilities range from 147 to 27200 x10-6 SI (average = 5713 x10-6 SI). Anisotropy degree (Pj) range from 1.011 to 1.055 with two sites of 1.134-1.254 (Pj average = 1.046). Shape is mostly oblate ranging the T-factor from 0.843 to 0.409 and only one site mainly prolate: T of -0.277 (T average = 0.550).

  14. Arsenic and cadmium exposure in children living near a smelter complex in San Luis Potosí, Mexico.

    PubMed

    Díaz-Barriga, F; Santos, M A; Mejía, J J; Batres, L; Yáñez, L; Carrizales, L; Vera, E; del Razo, L M; Cebrián, M E

    1993-08-01

    The main purpose of this study was to assess environmental contamination by arsenic and cadmium in a smelter community (San Luis Potosí City, México) and its possible contribution to an increased body burden of these elements in children. Arsenic and cadmium were found in the environment (air, soil, and household dust, and tap water) as well as in the urine and hair from children. The study was undertaken in three zones: Morales, an urban area close to the smelter complex; Graciano, an urban area 7 km away from the complex; and Mexquitic, a small rural town 25 km away. The environmental study showed that Morales is the most contaminated of the zones studied. The range of arsenic levels in soil (117-1396 ppm), dust (515-2625 ppm), and air (0.13-1.45 micrograms/m3) in the exposed area (Morales) was higher than those in the control areas. Cadmium concentrations were also higher in Morales. Estimates of the arsenic ingestion rate in Morales (1.0-19.8 micrograms/kg/day) were equal to or higher than the reference dose of 1 microgram/kg/day calculated by the Environmental Protection Agency. The range of arsenic levels in urine (69-594 micrograms/g creatinine) and hair (1.4-57.3 micrograms/g) and that of cadmium in hair (0.25-3.5 micrograms/g) indicated that environmental exposure has resulted in an increased body burden of these elements in children, suggesting that children living in Morales are at high risk of suffering adverse health effects if exposure continues.

  15. Phytoavailability of antimony and heavy metals in arid regions: the case of the Wadley Sb district (San Luis, Potosí, Mexico).

    PubMed

    Levresse, G; Lopez, G; Tritlla, J; López, E Cardellach; Chavez, A Carrillo; Salvador, E Mascuñano; Soler, A; Corbella, M; Sandoval, L G Hernández; Corona-Esquivel, R

    2012-06-15

    This paper presents original results on the Sb and heavy metals contents in sediments and waste tailings, plants and water from the giant Wadley antimony mine district (San Luis Potosí State, Mexico). The dominant antimony phases in mining wastes are stibiconite, montroydite and minor hermimorphite. The waste tailings contain high concentrations of metals and metalloids (antimony, iron, zinc, arsenic, copper, and mercury). Manganese, copper, zinc, and antimony contents exceed the quality guidelines values for groundwater, plants and for waste tailings. Results indicate that peak accumulation is seasonal due to the concentration by high metabolism plants as Solanaceae Nicotiana. The metal phytoavailability in waste tailings is highly dependant on the metal speciation, its capability to be transported in water and, more particularly, the plant metabolism efficiency.

  16. Counterclockwise rotations in the Late Eocene-Oligocene volcanic fields of San Luis Potosí and Sierra de Guanajuato (eastern Mesa Central, Mexico)

    NASA Astrophysics Data System (ADS)

    Andreani, Louis; Gattacceca, Jerôme; Rangin, Claude; Martínez-Reyes, Juventino; Demory, François

    2014-12-01

    We used paleomagnetic and structural data to investigate the late Eocene-Oligocene tectonic evolution of the Mesa Central area in Mexico. The Mesa Central was affected by NW-trending faults (Tepehuanes-San Luis fault system) coeval with a Late Eocene-Oligocene ignimbrite flare-up and by post-27 Ma NNE-trending grabens related to the Basin and Range. We obtained reliable paleomagnetic directions from 61 sites within the Late Eocene-Oligocene volcanic series (~ 30 to ~ 27 Ma) of the San Luis Potosí volcanic field and Sierra de Guanajuato. For each site we also measured the anisotropy of magnetic susceptibility (AMS). Tilt corrections were made using AMS data for 33 sites where in situ bedding measurements were not available. Paleomagnetic directions indicate counterclockwise rotations of about 10° with respect to stable North America after 30-25 Ma. Structural data suggest that the volcanic succession was mainly affected by normal faults. However, we also found evidences for oblique or horizontal striae showing a left-lateral component along NW-trending faults and a right lateral component along NE-trending faults. Both motions are consistent with a N-S extension oblique to the Tepehuanes-San Luis fault system. Previous paleomagnetic studies in northern and southern Mexico show the prevalence of minor left-lateral shear components along regional-scale transpressional and transtensional lineaments. Our paleomagnetic data may reflect thus small vertical-axis rotations related to a minor shear component coeval with the Oligocene intra-arc extension in central Mexico.

  17. Medical therapeutic itineraries of women with breast cancer diagnosis affiliated to the People's Health Insurance in San Luis Potosí, central Mexico.

    PubMed

    Tejada-Tayabas, Luz María; Salcedo, Liseth Amell; Espino, Joel Monárrez

    2015-01-01

    This study aims to describe the medical itineraries followed by breast cancer women affiliated to the People's Health Insurance in San Luis Potosí, central Mexico. We used an ethnographic approach based on oral histories of 12 women diagnosed with breast cancer in the year prior to the first meeting. Two face-to-face sessions per participant lasting 60 minutes each were conducted followed by a telephone interview. Content and diachronic analyses were used. Three main itineraries were identified: (1) diagnostic process, (2) final diagnosis to treatment, and (3) cancer control and relapse. Findings suggested that infrastructure and human resources to adequately screen and timely diagnose breast cancer were scant and insufficiently trained, respectively. Deferral of medical assessment was related with lack of information about breast cancer consequences, with women being afraid of a positive result, and with economic constraints. The current screening program needs to be redesigned to prevent diagnostic delays, as these seem to explain the high frequency of advanced stages reported at the time of diagnosis.

  18. Use of abstraction regime and knowledge of hydrogeological conditions to control high-fluoride concentration in abstracted groundwater: San Luis Potosı´ basin, Mexico

    NASA Astrophysics Data System (ADS)

    Carrillo-Rivera, J. J.; Cardona, A.; Edmunds, W. M.

    2002-04-01

    Significant amounts of fluoride are found in the abstracted groundwater of San Luis Potosı´. This groundwater withdrawal induces a cold, low-fluoride flow as well as deeper thermal fluoride-rich flow in various proportions. Flow mixing takes place depending on the abstraction regime, local hydrogeology, and borehole construction design and operation. Fluoride concentrations (≈3.7 mg l -1) could become higher still, in time and space, if the input of regional fluoride-rich water to the abstraction boreholes is enhanced. It is suggested that by controlling the abstraction well-head water temperature at 28-30 °C, a pumped water mixture with a fluoride content close to the maximum drinking water standard of 1.5 mg l -1 will be produced. Further, new boreholes and those already operating could take advantage of fluoride solubility controls to reduce the F concentration in the abstracted water by considering lithology and borehole construction design in order to regulate groundwater flow conditions.

  19. Thermal history of the upper mantle beneath a young back-arc extensional zone: ultramafic xenoliths from San Luis Potosí, Central Mexico

    NASA Astrophysics Data System (ADS)

    Heinrich, Wilhelm; Besch, Thomas

    1992-06-01

    At the San Luis Potosí (SLP) volcanic field (Central Mexico), Quaternary basanites and tuff breccias have sampled a suite of ultramafic xenoliths, predominately spinel lherzolites, spinel-olivine websterites, spinel pyroxenites, and hornblende-rich pyroxenites. Spinel lherzolites from the La Ventura maars have protogranular to equigranular textures, those from the Santo Domingo maars are strongly sheared. Both spinel-lherzolite types show similar whole-rock major and trace-element abundances. They are fertile to slightly depleted with mineralogical and geochemical heterogeneities induced by partial melting processes. Pyroxenites with either magmatic or metamorphic textures are high-pressure cumulates. Hornblende-rich pyroxenites are genetically linked to the host basanites. Most of the protogranular spinel lherzolites contain veinlets of glass along grain boundaries. These glasses are chemically homogeneous and have trachybasaltic to trachyandesitic compositions. Mg- and Fe2+-partitioning between olivine and glass suggests chemical equilibrium between the melts represented by the glasses and the spinel-lherzolite mineral assemblage at about 1,000°C and 10 to 15 kbar. The melts are interpreted to be of upper mantle origin. They may have been formed by in-situ partial melting in the presence of volatiles or represent percolating melts chemically buffered by the spinel-lherzolite mineral assemblage at uppermost mantle conditions. Mineral chemistry in all rock types of the whole xenolith suite reveals distinct disequilibrium features reflecting partial re-equilibration stages towards lower temperatures estimated to be from 1,050°C to 850°C at 9 to 15 kbar. The presence of similar zoning and exsolution features mainly documented in pyroxenes along with similar maximum and minimum temperatures requires all sampled xenoliths to have undergone the same temperature regime within the upper mantle. The sheared spinel lherzolites from the Sto. Domingo field are interpreted

  20. Eocene to Quaternary mafic-intermediate volcanism in San Luis Potosí, central Mexico: The transition from Farallon plate subduction to intra-plate continental magmatism

    NASA Astrophysics Data System (ADS)

    Aguillón-Robles, Alfredo; Tristán-González, Margarito; de Jesús Aguirre-Díaz, Gerardo; López-Doncel, Rubén A.; Bellon, Hervé; Martínez-Esparza, Gilberto

    2014-04-01

    The San Luis Potosí Volcanic Field (SLPVF) of central Mexico includes volcanic sequences of felsic, intermediate and basic compositions that were erupted as discrete episodes from the Eocene to the Pleistocene. Volcanism was dominated by widespread and voluminous rhyolitic ignimbrites of the mid-Tertiary Ignimbrite Flare-up. However, the complete volcanic history must consider basaltic and andesitic Eocene-Pleistocene volcanic successions that provide key evidence for understanding the geochemical evolution of the volcanism in the SLPVF during this time span. Five sequences are recognized according to their geochemical characteristics, each comprising a volcano-tectonic episode. The first episode comprises basaltic andesites and andesites erupted during three intervals, 45-42 Ma, 36-31 Ma, and 31-30 Ma. The oldest was derived from subduction magmatism, whereas the youngest has an intra-plate magmatic signature and this represents the transition from the end of a long lasting subduction regime of the Farallon plate to the initiation of intra-plate continental extension in the North American plate. The second episode, at 29.5-28 Ma, comprises a bimodal succession of high-silica rhyolites and alkaline basalts (hawaiites) that are interpreted as magmatism generated in an intra-plate continental extension regime during the Basin and Range faulting. The third episode, at 21 Ma, is characterized by trachybasalts and trachyandesites that represent mantle basaltic melts that were contaminated through assimilation of the lower crust during advanced stage of intra-plate extension that started at Oligocene. The fourth episode includes 12 Ma alkaline basalts and andesites that were erupted from fissures. These mantle derived magmas evolved to andesites by crustal anatexis and crystal fractionation within a continued, extensional, intra-plate regime. Lastly, the fifth episode comprises 5.0 to 0.6 Ma alkaline basalts (basanites) containing mantle xenoliths, that were erupted

  1. [Dental fluorosis in San Luis Potosi and its solution alternatives (pilot study)].

    PubMed

    Sánchez Prieto, M; Vázquez Guerrero, V; Silva Romo, E; Moreno Vélez, R; Ochoa Flores, L; Hernández, M J

    1988-12-01

    A study exposing the situation affecting the population of San Luis Potosí in central México, caused by dental fluorosis. Findings point to the need of implementing devices capable of regulating the concentrations of Fluorine ion (generating the efficient prevention of dental cavity incidence), to maintain them at optimal levels and without deletereal effects.

  2. Origin of the Joya Honda maar, San Luis Potosí, México

    NASA Astrophysics Data System (ADS)

    Aranda-Gómez, JoséJorge; Luhr, James F.

    1996-11-01

    Joya Honda is a Quaternary maar of unusual type from the Mexican Basin and Range Province. Its ~ 300-m-deep crater is excavated in Cretaceous limestones. The surrounding tephra deposit, which in places is > 100 m thick, begins with a series of weakly indurated pyroclastic-surge and -fall layers that we interpret as dry-surge deposits. These are overlain by the main sequence of strongly indurated, massive tuff breccias that we interpret as wet-surge deposits. Joya Honda formed subaerially from the interaction of groundwater with rapidly ascending intraplate-type basanitic magma carrying peridotitic mantle xenoliths. Local aquifer characteristics controlled the style of eruption and the nature of the deposits. Groundwater in the limestone-hosted aquifer beneath Joya Honda was apparently contained within solution-enhanced fractures. At the onset of the eruption, magma began to interact with a moderate amount of groundwater, producing the dry-surge deposits, which are typical of deposits found at many maars and tuff rings. As the eruption continued, the crater grew and the hydromagmatic blasts fractured the limestones around the explosion foci. A marked increase in the water/magma ratio of the system followed when a large fracture or a portion of the limestone with enhanced secondary permeability was intersected by the expanding crater. Subsequent phreatomagmatic explosions occurred in a system with groundwater flow rates several orders of magnitude larger than in the initial dry-surge stage. At the maar rim these wet eruptions led to the emplacement of massive tuff breccias through a combination of fallout, surges and mudflows. These steeply dipping tuff breccias are similar to deposits found at many tuff cones. Juvenile clasts in the near-vent deposits show marked upward increases in both hydration (palagonitization) and vesicularity. The increased palagonitization with height in the section appears to be a consequence of the overall increased wetness of the eruption with time, correlating with greater carbonate cementation and lithification in the upper part of the deposit. The transition toward higher vesicularity is interpreted as evidence of a gradual reduction in the confining pressure for the ascending magma prior to explosive fragmentation, perhaps related to unroofing during progressive excavation of the overlying maar crater. Thus, Joya Honda does not support maar-formation models that invoke downward displacement of explosion foci, caused by formation of a cone of depression in the aquifer, in order to maintain the confining pressure for the hydromagmatic blasts.

  3. Detecting areas disturbed by mining activities through Landsat images, San Luis Potosi City, Mexico

    NASA Astrophysics Data System (ADS)

    Torres-Vera, M.-A.

    2009-04-01

    Mining history in San Luis Potosí (Mexico) goes back to more than four centuries, and the accumulation of mining waste poses an important problem to ecological risk prevention. Epithermal deposits are the most common in this region and the impact of mining exploitation must be evaluated to propose sustainable development of the natural resources, which have a strong contribution of the national economy. The state San Luis Potosi is situated in the central part of Mexico between parallels 21°11' and 24°34' of north latitude and 98°23' and 102°14' of west longitude, 424 km northeast from Mexico City. Today is a sprawling city with more than half a million residents. The aim of this study was to analyse land cover and vegetation changes between 1972 and 2000 in San Luis Potosi Valley, using satellite image data. Since large changes in land cover and vegetation are taking place in the Valley and there is a lack of good data, such as maps, statistics and aerial photographs, it was appropriate to use satellite data for assessment of land cover and vegetation to estimate the environmental impact of the mining industry. Field data samples were used to evaluate the change results obtained with the multispectral satellite images. The results show that land cover change in the San Luis Potosi Valley has occurred in the past decade as a result of both natural forces and human activities, which have in turn impacted on the regional sustainable development of the mining resources.

  4. Labor attributes and strategies: the case of tomato workers in san luis potosi, Mexico.

    PubMed

    Ledesma, Maria Isabel Mora

    2010-01-01

    In the context of the economic crisis in the 1980s that affected Mexico and the rest of Latin America, official policies encouraged commercial agriculture, especially the cultivation of export crops. During that period, women's entry into the paid labor market accelerated. For many women in rural areas, this meant widening opportunities for participation and a chance not only to help their families, but also to look for a partner, earn their own money, and "see the world." This article analyzes the incorporation of women into the tomato agro-industry in the Altiplano region of el Valle de Arista, San Luis Potosí, Mexico. It discusses the strategies that women workers use-physical appearance, experience, and efficiency-as characteristics that are "required" in order to stay in this highly competitive, segmented, and precarious labor market. PMID:21342870

  5. Labor attributes and strategies: the case of tomato workers in san luis potosi, Mexico.

    PubMed

    Ledesma, Maria Isabel Mora

    2010-01-01

    In the context of the economic crisis in the 1980s that affected Mexico and the rest of Latin America, official policies encouraged commercial agriculture, especially the cultivation of export crops. During that period, women's entry into the paid labor market accelerated. For many women in rural areas, this meant widening opportunities for participation and a chance not only to help their families, but also to look for a partner, earn their own money, and "see the world." This article analyzes the incorporation of women into the tomato agro-industry in the Altiplano region of el Valle de Arista, San Luis Potosí, Mexico. It discusses the strategies that women workers use-physical appearance, experience, and efficiency-as characteristics that are "required" in order to stay in this highly competitive, segmented, and precarious labor market.

  6. Geophysical Exploration of Fractured-Media Aquifers at the Mexican Mesa Central: Satellite City, San Luis Potosí, Mexico

    NASA Astrophysics Data System (ADS)

    López Loera, Héctor; Ramos Leal, José Alfredo; Dávila Harris, Pablo; Torres Gaytan, David Ernesto; Martinez Ruiz, Victor Julian; Gogichaishvili, Avto

    2014-09-01

    Groundwater is scarce in arid and semi-arid zones in the Mexican Mesa Central. It is found at depths over 200 m, and its movement is primarily through fractures. This work aims to present a geophysical methodology, which shows the potential of combining natural and induced methods to locate confined aquifers in fault zones. The studies begin by interpreting the aeromagnetic survey, mainly by seeking lineaments associated with low magnetic anomalies, which are correlated with fault zones, and/or fractures and/or geological contacts where ferromagnetic minerals have undergone oxidation due to their association with recharge zones. These aeromagnetic lineaments are confirmed on land by a ground magnetic survey. After locating these areas, interpreted as permeability zones, their possible association with moist zones is confirmed by applying the vertical electrical sounding (VES) technique. H-type curve is associated with the presence of saturated zones. This study used the proposed methodology to interpret four main aeromagnetic lineaments and 12 main ground magnetic lineaments in a 36 km2 (6 km × 6 km) area. Twenty-six SEV were performed over these magnetic lineaments, of which about 50 % were associated with H-type resistivity curves, interpreted as being associated with moisture. Of the 12 VES with inferred groundwater potential, two wells have been drilled to date, one having an extraction flow of 70 lps.

  7. Geophysical Exploration of Fractured-Media Aquifers at the Mexican Mesa Central: Satellite City, San Luis Potosí, Mexico

    NASA Astrophysics Data System (ADS)

    López Loera, Héctor; Ramos Leal, José Alfredo; Dávila Harris, Pablo; Torres Gaytan, David Ernesto; Martinez Ruiz, Victor Julian; Gogichaishvili, Avto

    2015-01-01

    Groundwater is scarce in arid and semi-arid zones in the Mexican Mesa Central. It is found at depths over 200 m, and its movement is primarily through fractures. This work aims to present a geophysical methodology, which shows the potential of combining natural and induced methods to locate confined aquifers in fault zones. The studies begin by interpreting the aeromagnetic survey, mainly by seeking lineaments associated with low magnetic anomalies, which are correlated with fault zones, and/or fractures and/or geological contacts where ferromagnetic minerals have undergone oxidation due to their association with recharge zones. These aeromagnetic lineaments are confirmed on land by a ground magnetic survey. After locating these areas, interpreted as permeability zones, their possible association with moist zones is confirmed by applying the vertical electrical sounding (VES) technique. H-type curve is associated with the presence of saturated zones. This study used the proposed methodology to interpret four main aeromagnetic lineaments and 12 main ground magnetic lineaments in a 36 km2 (6 km × 6 km) area. Twenty-six SEV were performed over these magnetic lineaments, of which about 50 % were associated with H-type resistivity curves, interpreted as being associated with moisture. Of the 12 VES with inferred groundwater potential, two wells have been drilled to date, one having an extraction flow of 70 lps.

  8. [Physical factors influencing the floristic relationships of pinyon pine (Pinaceae) from San Luis Potosi, Mexico].

    PubMed

    Romero, Angélica; Luna, Mario; García, Edmundo

    2014-06-01

    In plant communities, the species distribution patterns and their relationships with environmental factors are of central importance in ecology. In San Luis Potosí of Mexico, woodlands of Pinus cembroides and P. johannis are sympatric, but P. cembroides tends to be located in South and Southwest slopes, in more disturbed sites; unlike, P. johannis, is mostly distributed in mesic areas, in North and Northeast slopes. The aim of this study was to analyze the influence of some physical factors on the floristic similarity of pinyon pine P. cembroides and P. johannis. The study area was located in the Sierra San Miguelito, San Luis Potosí, Mexico. We selected 40 sampling units spread over an area of 50km2. In each unit, we laid out two 20m long lines perpendicular to each other, in which we recorded cover data of the plant species intercepted. We developed two data matrices, the first one including cover values of 91 species, and the second one, considering seven topographical, climatic, and solar radiation variables. We applied cluster analysis and ordination to explore the influence of environmental variables on the floristic differentiation of pinyon pine woodlands. Clustering showed six groups, the first three characterized by P. cembroides. The ordination showed that variance represented by the first three axes was 65.9%. Axis 1 was positively correlated with altitude and negatively with mean annual temperature; axes two and three, showed low correlation with the variables tested. P. cembroides woodlands and accompanying flora tend to be located in lower altitude, higher mean annual temperature, and mainly in South-Southwestern slopes. In contrast, stands of P. johannis, mixed stands of P. johannis-P. cembroides, and Quercus potosina, were usually founded in greater altitudes, mean annual temperature slightly lower, and North-Northeastern exposure. The sites of these monospecific and mixed woodlands with associated species, indicators of environmental variables

  9. 19. REGIONAL MAP, SALINAS RIVER PROJECT, CAMP SAN LUIS OBISPO, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    19. REGIONAL MAP, SALINAS RIVER PROJECT, CAMP SAN LUIS OBISPO, IN CENTRAL PORTION OF SAN LUIS OBISPO, CALIFORNIA. Leeds Hill Barnard & Jewett - Consulting Engineers, February 1942. - Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

  10. 76 FR 10945 - San Luis Trust Bank, FSB, San Luis Obispo, CA; Notice of Appointment of Receiver

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-28

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF THE TREASURY Office of Thrift Supervision San Luis Trust Bank, FSB, San Luis Obispo, CA; Notice of Appointment of... Corporation as sole Receiver for San Luis Trust Bank, FSB, San Luis Obispo, California, (OTS No. 15051)...

  11. 33 CFR 110.120 - San Luis Obispo Bay, Calif.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false San Luis Obispo Bay, Calif. 110... ANCHORAGES ANCHORAGE REGULATIONS Special Anchorage Areas § 110.120 San Luis Obispo Bay, Calif. (a) Area A-1. Area A-1 is the water area bounded by the San Luis Obispo County wharf, the shoreline, a line...

  12. 33 CFR 110.120 - San Luis Obispo Bay, Calif.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false San Luis Obispo Bay, Calif. 110... ANCHORAGES ANCHORAGE REGULATIONS Special Anchorage Areas § 110.120 San Luis Obispo Bay, Calif. (a) Area A-1. Area A-1 is the water area bounded by the San Luis Obispo County wharf, the shoreline, a line...

  13. Residential metal contamination and potential health risks of exposure in adobe brick houses in Potosí, Bolivia

    EPA Science Inventory

    Potosí, Bolivia, is the site of centuries of historic and present-day mining of the Cerro Rico Mountain, known for its rich polymetallic deposits, and was the site of large-scale Colonial era silver refining operations, both of which have left a legacy of pollution. In this study...

  14. Magnetotelluric Data, Southern San Luis Valley, Colorado

    USGS Publications Warehouse

    Williams, Jackie M.; Rodriguez, Brian D.

    2007-01-01

    Introduction The population of the San Luis Valley region is growing rapidly. The shallow unconfined and the deeper confined Santa Fe Group aquifer in the San Luis Basin is the main sources of municipal water for the region. Water shortfalls could have serious consequences. Future growth and land management in the region depend on accurate assessment and protection of the region's ground-water resources. An important issue in managing the ground-water resources is a better understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits that fill the Rio Grande rift, which contain the principal ground-water aquifers. The U.S. Geological Survey (USGS) is conducting a series of multidisciplinary studies of the San Luis Basin located in southern Colorado. Detailed geologic mapping, high-resolution airborne magnetic surveys, gravity surveys, an electromagnetic survey, called magnetotellurics (MT), and hydrologic and lithologic data are being used to better understand the aquifer systems. The primary goal of the MT survey is to map changes in electrical resistivity with depth that are related to differences in rock type. These various rock types help control the properties of aquifers in the region. This report does not include any interpretation of the data. Its purpose is to release the MT data acquired at the 22 stations shown in figure 1.

  15. Magnetotelluric Data, San Luis Valley, Colorado

    USGS Publications Warehouse

    Rodriguez, Brian D.; Williams, Jackie M.

    2008-01-01

    The San Luis Valley region population is growing. Water shortfalls could have serious consequences. Future growth and land management in the region depend on accurate assessment and protection of the region?s ground-water resources. An important issue in managing the ground-water resources is a better understanding of the hydrogeology of the Santa Fe Group and the nature of the sedimentary deposits that fill the Rio Grande rift, which contain the principal ground-water aquifers. The shallow unconfined aquifer and the deeper confined Santa Fe Group aquifer in the San Luis Basin are the main sources of municipal water for the region. The U.S. Geological Survey (USGS) is conducting a series of multidisciplinary studies of the San Luis Basin located in southern Colorado. Detailed geologic mapping, high-resolution airborne magnetic surveys, gravity surveys, an electromagnetic survey (called magnetotellurics, or MT), and hydrologic and lithologic data are being used to better understand the aquifers. The MT survey primary goal is to map changes in electrical resistivity with depth that are related to differences in rock types. These various rock types help control the properties of aquifers. This report does not include any data interpretation. Its purpose is to release the MT data acquired at 24 stations. Two of the stations were collected near Santa Fe, New Mexico, near deep wildcat wells. Well logs from those wells will help tie future interpretations of this data with geologic units from the Santa Fe Group sediments to Precambrian basement.

  16. Tectono-volcanic control of fissure type vents for the 28 Ma Panalillo ignimbrite in the Villa de Reyes Graben, San Luis Potosí, México.

    NASA Astrophysics Data System (ADS)

    Tristán-González, Margarito; Labarthe-Hernández, Guillermo; Aguirre-Díaz, Gerardo J.; Aguillón-Robles, Alfredo

    2008-10-01

    The volcano-tectonic events at the Villa de Reyes Graben (VRG), in the southern Sierra Madre Occidental, Mexico, include 1) a regional NNE fault system developed before 32 Ma, 2) this pre-32 Ma faulting controlled the emplacement of 31.5 Ma dacitic domes, 3) NE faulting at 28 Ma that displaced the 31.5 Ma dacitic domes and formed the VRG, as well as the oblique grabens of Bledos and Enramadas oriented NW, 4) emplacement of Panalillo ignimbrite at 28 Ma filling the VRG and erupting from fissures related to the oblique grabens, and eruption of Placa basalt apparently also from fault-controlled vents.

  17. Neuroimaging Features of San Luis Valley Syndrome

    PubMed Central

    Whitehead, Matthew T.; Lee, Bonmyong

    2015-01-01

    A 14-month-old Hispanic female with a history of double-outlet right ventricle and developmental delay in the setting of recombinant chromosome 8 syndrome was referred for neurologic imaging. Brain MR revealed multiple abnormalities primarily affecting midline structures, including commissural dysgenesis, vermian and brainstem hypoplasia/dysplasia, an interhypothalamic adhesion, and an epidermoid between the frontal lobes that enlarged over time. Spine MR demonstrated hypoplastic C1 and C2 posterior elements, scoliosis, and a borderline low conus medullaris position. Presented herein is the first illustration of neuroimaging findings from a patient with San Luis Valley syndrome. PMID:26425383

  18. Reconstructing a Spanish Mission: San Luis de Talimali.

    ERIC Educational Resources Information Center

    McEwan, Bonnie G.; Hann, John H.

    2000-01-01

    Focuses on the reconstruction of the San Luis de Talimali, which was among the largest and most important missions in Spanish Florida with the Apalachee Indians as their parishioners. Describes the various structures found at San Luis: (1) the council house; (2) the chief's house; and (3) the church. (CMK)

  19. 33 CFR 80.1130 - San Luis Obispo Bay, CA.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 33 Navigation and Navigable Waters 1 2011-07-01 2011-07-01 false San Luis Obispo Bay, CA. 80.1130 Section 80.1130 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Pacific Coast § 80.1130 San Luis Obispo Bay, CA. A line drawn...

  20. 33 CFR 80.1130 - San Luis Obispo Bay, CA.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 1 2010-07-01 2010-07-01 false San Luis Obispo Bay, CA. 80.1130 Section 80.1130 Navigation and Navigable Waters COAST GUARD, DEPARTMENT OF HOMELAND SECURITY INTERNATIONAL NAVIGATION RULES COLREGS DEMARCATION LINES Pacific Coast § 80.1130 San Luis Obispo Bay, CA. A line drawn...

  1. Voice and Valency in San Luis Potosi Huasteco

    ERIC Educational Resources Information Center

    Munoz Ledo Yanez, Veronica

    2014-01-01

    This thesis presents an analysis of the system of transitivity, voice and valency alternations in Huasteco of San Luis Potosi (Mayan) within a functional-typological framework. The study is based on spoken discourse and elicited data collected in the municipalities of Aquismon and Tancanhuitz de Santos in the state of San Luis Potosi, Mexico. The…

  2. Anisotropy of magnetic susceptibility analysis of the Cantera Ignimbrite, San Luis Potosi, México: flow source recognition

    NASA Astrophysics Data System (ADS)

    Caballero-Miranda, C. I.; Torres-Hernández, J. R.; Alva-Valdivia, L. M.

    2009-01-01

    Anisotropy of magnetic susceptibility (AMS) was selected as the key technique to find the source of the widespread Cantera Ignimbrite and to seek its possible relationship with the San Luis Potosí Caldera. Eighteen sites (372 specimens from 155 cores) from the Oligocene Cantera Ignimbrite were sampled. AMS was measured on a KLY2 Kappabridge. AMS data were processed with Anisoft 3 software using Jelinek statistics as well as `SpheriStat' principal components and density distribution. Mean susceptibilities range from 290 to 5026 × 10-6 SI (average = 2526 × 10-6 SI). The anisotropy degree ( P j) ranges from 1.005 to 1.055, with only one site displaying a value of 1.134 ( P j average = 1.031). AMS ellipsoid shapes are mostly oblate, with the T-factor ranging from 0.843 to 0.144 ( T average = 0.529), although one site is mainly prolate ( T = -0.005), and three additional sites have an important proportion of prolate specimens. Magnetic fabrics of most sites shows k3 axes around nearly circular distributions and k 1- k 2 axes around elongated-girdle distributions defining sub-horizontal foliation planes; exceptions to this are related to sites with a significant percentage of prolate specimens. Flow directions inferred from AMS analysis indicate several ignimbrite sources located along selected NW-SE linear features (faults and fractures such as El Potosino Fault) as well as along the rim of the caldera structure. The geometry of volcanic outcrops, the NW-SE faulting-fracture system, as well as the AMS results suggest that this is a caldera structure resembling the trapdoor-type (Lipman, 1997).

  3. Evaluation of the PotoClean® decontamination technology for reprocessing of water supply lines in dental units during routine work

    PubMed Central

    Kramer, Axel; Koburger, Torsten; Taube, Lisa-Dorothea; Menzel, Michael; Meyer, Georg; Assadian, Ojan

    2012-01-01

    Background: A frequent problem in dental units is the microbial contamination of water and biofilm formation in the water supply lines. After random identification of a bacterial contaminated dental unit (310 cfu/ml) in a practise with 3 dental units we implemented the present study to evaluate the efficacy of the PotoClean® technology, based on anodic oxidation. Method: The efficacy of a regular low concentrated permanent decontamination (1 mg Cl/L) with an additional intensive decontamination by PotoClean® (three times 20 mg Cl/ml for 2 h) on three dental units was tested over 7 months. Microbial contamination, total chlorine concentration and redox potential have been analyzed. Dental unit A and B was 15 years old, unit C 5 years. Results: After 3 intensive decontaminations, in dental unit A and B the number of bacteria and moulds could be reduced less than 7 d. Thereafter the bacteria counts increased again during the subsequent 7 month period and the amount of moulds was with some exceptions 300 cfu/ml, although PotoClean® was constantly added in the system (1 mg Cl/L). After further 7.5 month only with low concentrated permanent disinfection (1 mg Cl/L) both units were successful decontaminated. Dental unit C represented an object which was easier to decontaminate because of the advanced construction (prevention of water stagnation) and the shorter useful life. At the beginning of the decontamination it was no bacterial contamination, but moulds were contained (300 cfu/ml). Already after the first intensive decontamination, no further bacteria and moulds could be detected. Discussion: An important factor for the efficacy of PotoClean® was the age of the units and their construction. For a new generation of dental units PotoClean® was effective during the whole period of monitoring. For two old types of dental unit with massive biofilm development the successful decontamination needed more than 7 month. Conclusion: The PotoClean® technology has resulted

  4. 40 CFR 81.176 - San Luis Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 17 2010-07-01 2010-07-01 false San Luis Intrastate Air Quality Control Region. 81.176 Section 81.176 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED... Quality Control Regions § 81.176 San Luis Intrastate Air Quality Control Region. The San Luis...

  5. 40 CFR 81.176 - San Luis Intrastate Air Quality Control Region.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 17 2011-07-01 2011-07-01 false San Luis Intrastate Air Quality Control Region. 81.176 Section 81.176 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED... Quality Control Regions § 81.176 San Luis Intrastate Air Quality Control Region. The San Luis...

  6. 76 FR 6517 - San Luis & Rio Grande Railroad-Petition for a Declaratory Order

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-04

    ... Surface Transportation Board San Luis & Rio Grande Railroad--Petition for a Declaratory Order AGENCY... INFORMATION: In response to a petition filed by San Luis & Rio Grande Railroad (SLRG), the Board instituted a.... See San Luis & Rio Grande R.R.--Petition for a Declaratory Order, FD 35380 (STB served Aug. 12,...

  7. Residential metal contamination and potential health risks of exposure in adobe brick houses in Potosí, Bolivia.

    PubMed

    McEwen, Abigail R; Hsu-Kim, Heileen; Robins, Nicholas A; Hagan, Nicole A; Halabi, Susan; Barras, Olivo; Richter, Daniel deB; Vandenberg, John J

    2016-08-15

    Potosí, Bolivia, is the site of centuries of historic and present-day mining of the Cerro Rico, a mountain known for its rich polymetallic deposits, and was the site of large-scale Colonial era silver refining operations. In this study, the concentrations of several metal and metalloid elements were quantified in adobe brick, dirt floor, and surface dust samples from 49 houses in Potosí. Median concentrations of total mercury (Hg), lead (Pb), and arsenic (As) were significantly greater than concentrations measured in Sucre, Bolivia, a non-mining town, and exceeded US-based soil screening levels. Adobe brick samples were further analyzed for bioaccessible concentrations of trace elements using a simulated gastric fluid (GF) extraction. Median GF extractable concentrations of Hg, As, and Pb were 0.085, 13.9, and 32.2% of the total element concentration, respectively. Total and GF extractable concentrations of Hg, As, and Pb were used to estimate exposure and potential health risks to children following incidental ingestion of adobe brick particles. Risks were assessed using a range of potential ingestion rates (50-1000mg/day). Overall, the results of the risk assessment show that the majority of households sampled contained concentrations of bioaccessible Pb and As, but not Hg, that represent a potential health risk. Even at the lowest ingestion rate considered, the majority of households exceeded the risk threshold for Pb, indicating that the concentrations of this metal are of particular concern. To our knowledge, this is the first study to quantify key trace elements in building materials in adobe brick houses and the results indicate that these houses are a potential source of exposure to metals and metalloids in South American mining communities. Additional studies are needed to fully characterize personal exposure and to understand potential adverse health outcomes within the community.

  8. Residential metal contamination and potential health risks of exposure in adobe brick houses in Potosí, Bolivia.

    PubMed

    McEwen, Abigail R; Hsu-Kim, Heileen; Robins, Nicholas A; Hagan, Nicole A; Halabi, Susan; Barras, Olivo; Richter, Daniel deB; Vandenberg, John J

    2016-08-15

    Potosí, Bolivia, is the site of centuries of historic and present-day mining of the Cerro Rico, a mountain known for its rich polymetallic deposits, and was the site of large-scale Colonial era silver refining operations. In this study, the concentrations of several metal and metalloid elements were quantified in adobe brick, dirt floor, and surface dust samples from 49 houses in Potosí. Median concentrations of total mercury (Hg), lead (Pb), and arsenic (As) were significantly greater than concentrations measured in Sucre, Bolivia, a non-mining town, and exceeded US-based soil screening levels. Adobe brick samples were further analyzed for bioaccessible concentrations of trace elements using a simulated gastric fluid (GF) extraction. Median GF extractable concentrations of Hg, As, and Pb were 0.085, 13.9, and 32.2% of the total element concentration, respectively. Total and GF extractable concentrations of Hg, As, and Pb were used to estimate exposure and potential health risks to children following incidental ingestion of adobe brick particles. Risks were assessed using a range of potential ingestion rates (50-1000mg/day). Overall, the results of the risk assessment show that the majority of households sampled contained concentrations of bioaccessible Pb and As, but not Hg, that represent a potential health risk. Even at the lowest ingestion rate considered, the majority of households exceeded the risk threshold for Pb, indicating that the concentrations of this metal are of particular concern. To our knowledge, this is the first study to quantify key trace elements in building materials in adobe brick houses and the results indicate that these houses are a potential source of exposure to metals and metalloids in South American mining communities. Additional studies are needed to fully characterize personal exposure and to understand potential adverse health outcomes within the community. PMID:27100004

  9. Social Integration and Health Behavioral Change in San Luis, Honduras

    ERIC Educational Resources Information Center

    McQuestion, Michael J.; Calle, Ana Quijano; Drasbek, Christopher; Harkins, Thomas; Sagastume, Lourdes J.

    2010-01-01

    This study explores the effects of social integration on behavioral change in the course of an intensive, community-based public health intervention. The intervention trained volunteers and mobilized local organizations to promote 16 key family health practices in rural San Luis, Honduras, during 2004 to 2006. A mixed methods approach is used.…

  10. Geologic Map of the San Luis Quadrangle, Costilla County, Colorado

    USGS Publications Warehouse

    Machette, Michael N.; Thompson, Ren A.; Drenth, Benjamin J.

    2008-01-01

    The map area includes San Luis and the primarily rural surrounding area. San Luis, the county seat of Costilla County, is the oldest surviving settlement in Colorado (1851). West of the town are San Pedro and San Luis mesas (basalt-covered tablelands), which are horsts with the San Luis fault zone to the east and the southern Sangre de Cristo fault zone to the west. The map also includes the Sanchez graben (part of the larger Culebra graben), a deep structural basin that lies between the San Luis fault zone (on the west) and the central Sangre de Cristo fault zone (on the east). The oldest rocks exposed in the map area are the Pliocene to upper Oligocene basin-fill sediments of the Santa Fe Group, and Pliocene Servilleta Basalt, a regional series of 3.7?4.8 Ma old flood basalts. Landslide deposits and colluvium that rest on sediments of the Santa Fe Group cover the steep margins of the mesas. Rare exposures of the sediment are comprised of siltstones, sandstones, and minor fluvial conglomerates. Most of the low ground surrounding the mesas and in the graben is covered by surficial deposits of Quaternary age. The alluvial deposits are subdivided into three Pleistocene-age units and three Holocene-age units. The oldest Pleistocene gravel (unit Qao) forms extensive coalesced alluvial fan and piedmont surfaces, the largest of which is known as the Costilla Plain. This surface extends west from San Pedro Mesa to the Rio Grande. The primary geologic hazards in the map area are from earthquakes, landslides, and localized flooding. There are three major fault zones in the area (as discussed above), and they all show evidence for late Pleistocene to possible Holocene movement. The landslides may have seismogenic origins; that is, they may be stimulated by strong ground shaking during large earthquakes. Machette and Thompson based this geologic map entirely on new mapping, whereas Drenth supplied geophysical data and interpretations.

  11. Working (And Sparring) With Luis: Some Personal Recollections

    NASA Astrophysics Data System (ADS)

    Pripstein, Moishe

    2011-04-01

    Luis Alvarez was the most remarkable physicist I have ever worked with. As a member of his bubble chamber group at the Lawrence Radiation Laboratory in Berkeley and subsequently as a leader of that group for several years, I could appreciate his outstanding attributes as a physicist and his forceful and colorful personality. Each day at the lab seemed exciting. Although he created the largest research group in particle physics in the world at the time, Luis was an ardent foe of group-think, which he characterized as ``intellectual phase-lock''. He had an uncanny intuition about physics and technology, coupled with an insatiable curiosity about the world around him. He is justly renowned as a member of the Inventors Hall of Fame for his myriad inventions and as a Nobel Laureate in physics for his contributions to particle physics through his development of the hydrogen bubble chamber technique, leading to the discovery of a large number of resonance states. However, it was his wide-ranging curiosity which led him to one of his finest achievements, while working with his son Walter - developing the asteroid impact theory as the explanation of the extinction of the dinosaurs. I will offer some personal recollections of Luis and the group in this period, including some of his other intriguing efforts which illustrate the breadth of his interests, pertaining to the Kennedy assassination and x-raying the pyramids, among them. All in all, a brilliant and most unusual scientist and stimulating colleague.

  12. Geothermal resource assessment of western San Luis Valley, Colorado

    SciTech Connect

    Zacharakis, Ted G.; Pearl, Richard Howard; Ringrose, Charles D.

    1983-01-01

    The Colorado Geological Survey initiated and carried out a fully integrated assessment program of the geothermal resource potential of the western San Luis Valley during 1979 and 1980. The San Luis Valley is a large intermontane basin located in southcentral Colorado. While thermal springs and wells are found throughout the Valley, the only thermal waters found along the western part of the Valley are found at Shaw Warm Springs which is a relatively unused spring located approximately 6 miles (9.66 km) north of Del Norte, Colorado. The waters at Shaws Warm Spring have a temperature of 86 F (30 C), a discharge of 40 gallons per minute and contain approximately 408 mg/l of total dissolved solids. The assessment program carried out din the western San Luis Valley consisted of: soil mercury geochemical surveys; geothermal gradient drilling; and dipole-dipole electrical resistivity traverses, Schlumberger soundings, Audio-magnetotelluric surveys, telluric surveys, and time-domain electro-magnetic soundings and seismic surveys. Shaw Warm Springs appears to be the only source of thermal waters along the western side of the Valley. From the various investigations conducted the springs appear to be fault controlled and is very limited in extent. Based on best evidence presently available estimates are presented on the size and extent of Shaw Warm Springs thermal system. It is estimated that this could have an areal extent of 0.63 sq. miles (1.62 sq. km) and contain 0.0148 Q's of heat energy.

  13. Hydrology of the San Luis Valley, south-central Colorado

    USGS Publications Warehouse

    Emery, P.A.; Boettcher, A.J.; Snipes, R.J.; Mcintyre, H.J.

    1969-01-01

    An investigation of the water resources of the Colorado part of the San Luis Valley was begun in 1966 by the U.S. Geological Survey, in cooperation with the Colorado Water Conservation Board. (See index map, fig. 1). The purpose of the investigation is to provide information for planning and implementing improved water-development and management practices. The major water problems in the San Luis Valley include (1) waterlogging, (2) waste of water by nonbeneficial evapotranspiration, (3) deterioration of ground-water chemical quality, and (4) failure of Colorado to deliver water to New Mexico and Texas in accordance with the Rio Grande Compact. This report describes the hydrologic environment, extent of water-resource development, and some of the problems related to that development. Information presented is based on data collected from 1966 to 1968 and on previous studies. Subsequent reports are planned as the investigation progresses. The San Luis Valley extends about 100 miles from Poncha Pass near the northeast corner of Saguache County, Colo., to a point about 16 miles south of the Colorado-New Mexico State line. The total area is 3,125 square miles, of which about 3,000 are in Colorado. The valley is nearly flat except for the San Luis Hills and a few other small areas. The Colorado part of the San Luis Valley, which is described in this report, has an average altitude of about 7,700 feet. Bounding the valley on the west are the San Juan Mountains and on the east the Sangre de Cristo Mountains. Most of the valley floor is bordered by alluvial fans deposited by streams originating in the mountains, the most extensive being the Rio Grande fan (see block diagram, fig. 2 in pocket). Most of the streamflow is derived from snowmelt from 4,700 square miles of watershed in the surrounding mountains. The northern half of the San Luis Valley is internally drained and is referred to as the closed basin. The lowest part of this area is known locally as the "sump." The

  14. Binturong (Arctictis binturong) and Kinkajou (Potos flavus) Digestive Strategy: Implications for Interpreting Frugivory in Carnivora and Primates

    PubMed Central

    Lambert, Joanna E.; Fellner, Vivek; McKenney, Erin; Hartstone-Rose, Adam

    2014-01-01

    Exclusive frugivory is rare. As a food resource, fruit is temporally and spatially patchy, low in protein, and variable in terms of energy yield from different carbohydrate types. Here, we evaluate the digestive physiology of two frugivorous Carnivora species (Potos flavus, Arctictis binturong) that converge with primates in a diversity of ecological and anatomical traits related to fruit consumption. We conducted feeding trials to determine mean digestive retention times (MRT) on captive animals at the Carnivore Preservation Trust (now Carolina Tiger Rescue), Pittsboro, NC. Fecal samples were collected on study subjects for in vitro analysis to determine methane, pH, and short chain fatty acid profiles; fiber was assayed using standard neutral detergent (NDF) and acid detergent (ADF) fiber methods. Results indicate that both carnivoran species have rapid digestive passage for mammals that consume a predominantly plant-based diet: A. binturong MRT = 6.5 hrs (0.3); P. flavus MRT = 2.5 hrs (1.6). In vitro experiments revealed no fermentation of structural polysaccharides – methane levels did not shift from 0 h to either 24 or 48 hours and no short chain fatty acids were detected. In both species, however, pH declined from one incubation period to another suggesting acidification and bacterial activity of microbes using soluble carbohydrates. A comparison with primates indicates that the study species are most similar in digestive retention times to Ateles – the most frugivorous anthropoid primate taxon. PMID:25157614

  15. Cannibalism in wild bonobos (Pan paniscus) at Lui Kotale.

    PubMed

    Fowler, Andrew; Hohmann, Gottfried

    2010-06-01

    We describe the cannibalization of an infant bonobo (circa 2.5 years old) at Lui Kotale, in the Democratic Republic of Congo. The infant died of unknown causes and was consumed by several community members including its mother and an older sibling one day after death. Certain features concerning the pattern of consumption fit in with previously observed episodes of cannibalism in Pan, whereas others, such as the mother's participation in consuming the body, are notable. The incident suggests that filial cannibalism among apes need not be the result of nutritional or social stress and does not support the idea that filial cannibalism is a behavioral aberration.

  16. Art as Critical Public Pedagogy: A Qualitative Study of Luis Camnitzer and His Conceptual Art

    ERIC Educational Resources Information Center

    Zorrilla, Ana; Tisdell, Elizabeth J.

    2016-01-01

    This qualitative study explored the connection between art and adult education for critical consciousness from the perspective and work of conceptual artist, Luis Camnitzer. The theoretical framework is grounded in the critical public pedagogy literature. Data collection methods included interviews with conceptual artist Luis Camnitzer and with…

  17. 76 FR 14042 - San Luis Valley National Wildlife Refuge Complex, Alamosa, CO; Comprehensive Conservation Plan...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-15

    ... Fish and Wildlife Service ; 60138-1265-6CCP-S3] San Luis Valley National Wildlife Refuge Complex... Statement (EIS) for the San Luis Valley National Wildlife Refuge Complex (Complex) in Alamosa, Colorado. The Complex comprises Baca, Monte Vista, and Alamosa National Wildlife Refuges (NWRs).We provide this...

  18. 76 FR 39091 - San Luis Obispo Flood Control and Water Conservation District; Notice of Effectiveness of Surrender

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-05

    ... Energy Regulatory Commission San Luis Obispo Flood Control and Water Conservation District; Notice of... for a Conduit Hydroelectric Project \\1\\ to the San Luis Obispo Flood Control and Water Conservation...\\ San Luis Obispo Flood Control and Water Conservation District, 17 FERC ] 62,113 (1981). On October...

  19. Luis de Florez and the Special Devices Division

    NASA Astrophysics Data System (ADS)

    Dawson, Paul Louis

    This Dissertation presents the life of Luis de Florez and the World War II history of the Special Devices Division (SDD) of the U.S. Navy's Bureau of Aeronautics. Luis de Florez was a well known consulting engineer, aviation fuel expert, private pilot and reserve Naval officer. While on active duty in 1940, he received the assignment to improve the Navy's flight training methods. To accomplish this objective, he promoted the concept of synthetic training, the use of simulators and other non-operational equipment, to provide training for Navy flight personnel such as pilots, gunners, navigators, flight engineers, radio operators and others as well as for ground based people like mechanics. He founded the Special Devices Division to design the tools and equipment needed for this type of training. The success of synthetic training and the devices developed by the SDD received recognition by the awarding of the Collier Trophy to de Florez in December 1944. This trophy is awarded annually for the most significant aeronautical achievement of the previous year (1943). De Florez received the award for the strategic accomplishment of training thousands of American airmen in 1943. The work of the Division also had other important technical, social, financial and operational impacts on the prosecution of WW II by the Allies. The work of the Division also had impacts on American society as a whole that persist to the present day. These impacts are discussed in detail. The Dissertation presents details of the devices and their use in aviation training as well as a history of the Division during the war. After the war, de Florez led an advisory board for the CIA. These activities and some of both the positive and negative results of the work of this board are discussed. This discussion includes de Florez' involvement in the CIA's drug experiments and the unfortunate Frank Olsen affair.

  20. Magnetotelluric data collected to characterize aquifers in the San Luis Basin, New Mexico

    USGS Publications Warehouse

    Ailes, Chad E.; Rodriguez, Brian D.

    2015-01-01

    The U.S. Geological Survey is conducting a series of multidisciplinary studies of the San Luis Basin as part of the Geologic Framework of Rio Grande Basins project. Detailed geologic mapping, high-resolution airborne magnetic surveys, gravity surveys, magnetotelluric surveys, and hydrologic and lithologic data are being used to better understand the aquifers in the San Luis Basin. This report describes one north-south and two east-west regional magnetotelluric sounding profiles, acquired in June of 2010 and July and August of 2011, across the San Luis Basin in northern New Mexico. No interpretation of the data is included.

  1. The San Luis Project: An Attempt to Decentralize Physics in Mexico

    ERIC Educational Resources Information Center

    Will, T. A.; Valladares, A. A.

    1976-01-01

    Described is a project being conducted by the Physics Institute of the University of San Luis Potori, Mexico, in order to avoid concentrating physics education and research activities in Mexico City. (SL)

  2. Ground water recharge to the aquifers of northern San Luis Valley, Colorado: A remote sensing investigation

    NASA Technical Reports Server (NTRS)

    Lee, K. (Principal Investigator); Huntley, D.

    1976-01-01

    The author has identified the following significant results. Ground water recharge to the aquifers of San Luis Valley west of San Luis Creek was primarily from ground water flow in the volcanic aquifers of the San Juan Mountains. The high permeability and anisotropic nature of the volcanic rocks resulted in very little contrast in flow conditions between the San Juan Mountains and San Luis Valley. Ground water recharge to aquifers of eastern San Luis Valley was primarily from stream seepage into the upper reaches of the alluvial fans at the base of the Sangre de Cristo Mountains. The use of photography and thermal infrared imagery resulted in a savings of time and increase in accuracy in regional hydrogeologic studies. Volcanic rocks exhibited the same spectral reflectance curve as sedimentary rocks, with only the absolute magnitude of reflectance varying. Both saline soils and vegetation were used to estimate general ground water depths.

  3. Oligocene basaltic volcanism of the northern Rio Grande Rift: San Luis Hills, Colorado

    USGS Publications Warehouse

    Thompson, R.A.; Johnson, C.M.; Mehnert, H.H.

    1991-01-01

    The inception of the Rio Grande Rift in northern New Mexico and southern Colorado was accompanied by voluminous mafic volcanism preserved in part as erosional remnants on an intrarift horst within the current axial rift graben of the San Luis Valley. Major and trace element constraints support a petrogenetic model of fractionation plus lower crustal assimilation for petrologic suites within the San Luis Hills rocks, although the model cannot relate lavas for the entire series to a common parent. Most mafic lavas of the San Luis Hills were evolved (Mg # <60) and contaminated by LREE-enriched silicic partial melts of granulitic lower crust depleted in Rb, Th, and U. However, relatively noncontaminated lavas can be identified and indicate at least two mantle source regions were involved. -from Authors

  4. Oligocene basaltic volcanism of the Northern Rio Grande Rift: San Luis Hills, Colorado

    NASA Astrophysics Data System (ADS)

    Thompson, Ren A.; Johnson, Clark M.; Mehnert, Harald H.

    1991-07-01

    The inception of the Rio Grande rift in northern New Mexico and southern Colorado was accompanied by voluminous mafic volcanism preserved in part as erosional remnants on an intrarift horst within the current axial rift graben of the San Luis Valley. Oligocene (˜26 Ma) volcanic rocks of the Hinsdale Formation at San Luis Hills range from 49 to 57 wt % SiO2 and include nepheline and hypersthene normative lavas. A mildly alkalic series consisting of trachybasalt, basaltic trachyandesite, and trachyandesite is volumetrically dominant, olivine tholeiites are subordinate, and xenocrystic trachyandesites containing abundant quartz and plagioclase xenocrysts occur only locally. Relative to the San Luis Hills olivine tholeiites which have La/Smn ˜ 2, the more alkaline series are enriched in light rare earth elements (LREE) and have La/Sm ratios that increase in the trachybasalt-basaltic trachyandesite suite (La/Smn ˜ 3) to xenocrystic trachyandesites that are the most LREE enriched (La/Smn ˜ 4). Chondrite-normalized, trace element patterns for the lavas in the San Luis Hills are similar in shape within the mildly alkaline to transitional series; they have characteristic Nb and Ta depletions and high K and Th relative to Ta, Nb, and LREE. Major and trace element constraints support a petrogenetic model of fractionation plus lower crustal assimilation for petrologic suites within the San Luis Hills rocks, although the model cannot relate lavas for the entire series to a common parent. Most mafic lavas of the San Luis Hills were evolved (Mg # <60) and contaminated by LREE-enriched silicic partial melts of granulitic lower crust depleted in Rb, Th, and U. Pb isotopes are the most sensitive indicators of crustal contamination, whereas shifts in Nd and Sr isotope ratios are associated with large amounts of assimilation. However, relatively noncontaminated lavas can be identified and indicate at least two mantle source regions were involved.

  5. 75 FR 76726 - San Luis Solar, LLC; Supplemental Notice That Initial Market-Based Rate Filing Includes Request...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-09

    ... From the Federal Register Online via the Government Publishing Office DEPARTMENT OF ENERGY Federal Energy Regulatory Commission San Luis Solar, LLC; Supplemental Notice That Initial Market- Based Rate... notice in the above-referenced proceeding of San Luis ] Solar, LLC's application for market-based...

  6. Lagrangian water quality dynamics in the San Luis Drain, California.

    NASA Astrophysics Data System (ADS)

    Volkmar, E. C.; Dahlgren, R. A.; Stringfellow, W. T.; Henson, S. S.; Borglin, S. E.; Kendall, C.

    2007-12-01

    Integration of temporal changes in biological and water quality constituents during downstream transport is critical to understanding aquatic ecosystem and biogeochemical dynamics of rivers, estuaries, and the near- coastal waters into which rivers flow. Changes in chemical, physical, and biological water quality constituents during downstream transport can be evaluated by following a specific parcel of water, known as a Lagrangian study. The objective of this study was to differentiate changes in water quality constituents occurring within a parcel of water as it travels downstream to the changes observed at a fixed sampling location. We sampled a parcel of agricultural drainage water as it traveled downstream for 84 h in a concrete-lined channel (San Luis Drain in San Joaquin Valley) with no additional water inputs or outputs. The Lagrangian sampling occurred in August 2006 and June 2007. Data from the Lagrangian study was compared to data collected at a fixed point using an automatic pump sampler and water quality sonde. Fluorescence (a measure of algal pigments), dissolved oxygen, temperature, pH, and conductivity were measured every 30 minutes, as well as collecting grab samples every 2 h for nutrient and suspended sediment analyses. Sinusoidal diel (24 h) patterns were observed for dissolved oxygen, pH, and temperature within the parcel of water. Algal pigments, nutrients, suspended solids, and turbidity did not exhibit sinusoidal diel patterns, generally observed at a fixed sampling location. The diel patterns observed indicated changes that would occur during downstream transport. Algal pigments showed a rapid day time increase during the first 24 to 48 h followed by a plateau or decrease for the remainder of the study. Algal growth was apparent each day during the study, as measured by increasing dissolved oxygen concentrations, in spite of non-detectable phosphate concentrations (<5 ppb) and nearly complete consumption of soluble silica during the 2007

  7. Emphatic or Reflexive? On the Endophoric Character of French "lui-meme" and Similar Complex Pronouns.

    ERIC Educational Resources Information Center

    Zribi-Hertz, Anne

    1995-01-01

    This study examined the referential properties of a class of complex pronouns labelled M-Pronouns, exemplified by Old English "himself," French "lui-meme," and English "his own." It is shown that M-Pronouns exhibit some properties commonly taken as characterizing reflexive anaphors, and that they also occur as "intensive" pronouns. Contains 66…

  8. Building from a sustainability viewpoint: New headquarters for San Luis Obispo Solar Group

    SciTech Connect

    Haggard, K.

    1996-10-01

    The Highway 41 fire of 1994 in Central California destroyed the San Luis Obispo Solar Group complex. This destruction offered them an opportunity to update their approach to sustainability while designing and building new facilities for the firm. This paper will describe this approach and the design characteristics of this project.

  9. Chasing Personal Meaning: Pedagogical Lessons through Luis Rodriguez's "Always Running"

    ERIC Educational Resources Information Center

    Theisen-Homer, Victoria

    2014-01-01

    In this autobiographical narrative, the author recounts her experiences teaching the novel "Always Running" by Luis Rodriguez with her English classes at a high school in a gang-heavy area. When she first started teaching, this teacher struggled to engage students. One particularly disruptive student requested to read "Always…

  10. Evaluating the sustainability of a regional system using Fisher information in the San Luis Basin, Colorado

    EPA Science Inventory

    This paper describes the theory, data, and methodology necessary for using Fisher information to assess the sustainability of the San Luis Basin (SLB) regional system over time. Fisher information was originally developed as a measure of the information content in data and is an ...

  11. SPECIAL PROBLEM REPORT, IMPROVING EXTENSION PROGRAM PLANNING PROCEDURES IN SAN LUIS OBISPO COUNTY, CALIFORNIA.

    ERIC Educational Resources Information Center

    CANNON, DALE CARTER

    A SURVEY WAS CONDUCTED BY MAIL QUESTIONNAIRE TO GATHER DATA ON THE FARM POPULATION OF SAN LUIS OBISPO COUNTY, CALIFORNIA, TO GET NAMES OF COMMUNITY LEADERS, AND PROVIDE MOTIVATION FOR EXTENSION PROGRAM PLANNING. THE MEAN AGE OF RESPONDENTS WAS 50, THE LARGE MAJORITY WITH CHILDREN AT HOME, THREE-FOURTHS NATIVE TO CALIFORNIA, ONE-HALF BEING BORN IN…

  12. Survey of San Luis Valley School Closures. Resource Report No. 4.

    ERIC Educational Resources Information Center

    Potts, Alfred M.

    School closures in Colorado's San Luis Valley were surveyed, listing the pros and cons of closing school during the potato harvest. In 1958, 12 of 31 elementary schools and 7 of 13 secondary schools ceased operation for periods up to 18 days during the potato harvest, closing schools to 4,447 students. Of these students, 904 elementary children…

  13. Green Net Regional Product for the San Luis Basin, Colorado: An Economic Measure of Regional Sustainability

    EPA Science Inventory

    This paper presents the data sources and methodology used to estimate Green Net Regional Product (GNRP), a green accounting approach, for the San Luis Basin (SLB). GNRP is equal to aggregate consumption minus the depreciation of man-made and natural capital. We measure the move...

  14. Cyanobacteria/Foraminifera Association from Anoxic/Dysoxic Beds of the Agua Nueva Formation (Upper Cretaceous - Cenomanian/Turonian) at Xilitla, San Luis Potosi, Central Mexico

    NASA Astrophysics Data System (ADS)

    Blanco-Piñón, A.; Maurrasse, F. J.; Rojas-León, A.; Duque-Botero, F.

    2008-05-01

    The Agua Nueva Formation in the vicinity of Xilitla, State of San Luis Potosí, Central Mexico, consists of interbedded brown shale (Grayish orange 10YR 7/4 to Moderate yellowish brown 10YR 5/4) and dark-gray fossiliferous limestone (Bluish gray 5B 6/1 to Dark bluish gray 5B 4/1), varying between 10 and 20 cm in thickness. The sequence also includes 2 to 4 cm- thick intermittent bentonite layers (Moderate greenish yellow 10Y 7/4, to dark greenish yellow 10Y 6/6 and Light olive 10Y 5/4). At the field scale, shaly intervals show no apparent internal structures, whereas most limestone beds show primary lamination at the millimeter scale (1-2 mm), and intermittent layers of black chert of about 5 cm thick. Pyrite is present as disseminated crystals and as 2 cm-thick layers. Bioturbation or macrobenthic organisms other than inoceramids do not occur in the Agua Nueva Formation at Xilitla. Unusual macrofossils are present only in limestone strata, and consist of well- preserved diverse genera of fishes such as sharks, Ptychodus sp. and teleosteans, Rhynchodercetis sp., Tselfatia sp., Goulmimichthys sp., and scales of Ichtyodectiformes, as well as ammonites and inoceramids (Blanco et al., 2006). The presence of Inoceramus (Mytyloides) labiatus (Maldonado-Koederll, 1956) indicates an Early Turonian age for the sequence. Total carbonate content (CaCO3 = TIC) varies between 62 and 94% in the Limestone beds, which yield Total Organic Carbon (TOC) from 0.4% to 2.5%; the shale intervals contain TIC values consistently lower than 33% and TOC lower than 0.8% Microscopically the limestone beds vary from mudstone to packstone composed essentially of coccoid cyanobacteria similar to coeval deposits in northeastern Mexico, Coahuila State, at Parras de La Fuente (Duque- Botero 2006). Similarly, the microspheroids are spherical to sub-spherical, and occur as isolated elements or aggregates forming series of chains of parallel-packed light lamina 1-2 mm thick. Filamentous cyanobacteria

  15. Late Glacial and Holocene Record of Hydroclimate in the San Luis Valley, Southern Colorado, USA

    NASA Astrophysics Data System (ADS)

    Yuan, F.; Koran, M.

    2012-12-01

    Lake sediments from the San Luis Valley, south-central Colorado, archive a detailed record of Late Glacial and Holocene climatic fluctuations in the southern Rocky Mountains. Together with radiometric dating analysis, measurements of grain size, magnetic susceptibility, total inorganic carbon (TIC), oxygen and carbon isotopic composition of the TIC fraction on sediment samples from San Luis Lake (at an average resolution of 60 years per sample) allow us to generate a sediment record of climatic change in the region spanning the last 16ka (1 ka=1000 cal yrs). This record documents the timing and duration of major climate episodes and trends, comparable to the existing paleoclimate records from the American Southwest. The Late Glacial record of San Luis Lake contains a big wet episode in the late part of the Mystery Interval (MI), a relatively dry climate during Bølling-Allerød (B/A) warm interval, and a relatively wet episode during the Younger Dryas (YD) interval, similar to the lake-level record found in the Estancia basin in central New Mexico. The early to middle Holocene record of d18O in the San Luis Lake parallels the calcite d18O record of Bison Lake in northern Colorado, documenting a history of significant change in precipitation seasonality across the northern boundary of the North American monsoon (NAM). The middle Holocene epoch is characterized by greater variations in magnetic susceptibility, d18O and d13C, suggesting the prevalence of wet, variable or transitional climate conditions. In contrast, the late Holocene climate is relatively dry, as indicated by more positive values of d18O in San Luis Lake. The results of this study reveal a complex history of climate evolution due to the interactions of two seasonally distinct precipitation regimes with mountainous landforms in the region.

  16. 76 FR 414 - Tier 1 Environmental Impact Statement for the Los Angeles to San Luis Obispo (LOSSAN North) Rail...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-04

    ...), Division 13, Public Resources Code; and FRA's Procedures for Considering Environmental Impacts (64 FR 28545... Lowry Davis Center, Lu Gilbert Room, 1232 De La Vina St., Santa Barbara, CA, 93101. San Luis...

  17. Dual-system Tectonics of the San Luis Range and Vicinity, Coastal Central California

    NASA Astrophysics Data System (ADS)

    Hamilton, D. H.

    2010-12-01

    The M 6.5 "San Simeon" earthquake of December 22, 2003, occurred beneath the Santa Lucia Range in coastal central California, and resulted in around $250,000,000 property damage and two deaths from collapse of an historic building in the town of Paso Robles, located 40 km from the epicenter. The earthquake and more than 10,000 aftershocks were well recorded by nearby seismographs, which permitted detailed analysis of the event (eg: McLaren et al., 2008). This analysis facilitated evaluation of the hazard of the occurrence of a similar event in the nearby San Luis Range, located along the coast west of the city of San Luis Obispo some 55 km south of the San Simeon epicenter. The future occurrence of earthquakes analogous to the 2003 event in this area had been proposed in the late 1960’s (eg: Benioff and Smith, 1967; Richter, 1969) but the apparent hazard of such occurrences came to be overshadowed by the discovery of the “Hosgri” strike slip fault passing close to the area in the offshore. However data accumulated since the early 1970’s clearly demonstrate the hazard as being partitioned between nearby earthquakes of strike slip origin, and underlying earthquakes of thrust origin analogous to that of the 2003 San Simeon earthquake. And for the onshore San Luis Range area, an underlying actively seismogenic thrust wedge appears to provide the maximum potential seismic ground motion; exceeding that potentially resulting from large events on nearby strike slip faults of the San Simeon-Hosgri system, for onshore sites. Understanding and documentation of the geology, geomorphology, tectonics and seismogenesis of the San Luis Range and vicinity has recently experienced a quantum improvement as both new and accumulated data have been analysed. An integrated interpretation of all available data now clearly shows that a dual “side by side” system of active tectonics exists in the region. Essentially the most obvious evidence for this is seen simply in the

  18. Airborne electromagnetic and magnetic survey data of the Paradox and San Luis Valleys, Colorado

    USGS Publications Warehouse

    Ball, Lyndsay B.; Bloss, Benjamin R.; Bedrosian, Paul A.; Grauch, V.J.S.; Smith, Bruce D.

    2015-01-01

    In October 2011, the U.S. Geological Survey (USGS) contracted airborne magnetic and electromagnetic surveys of the Paradox and San Luis Valleys in southern Colorado, United States. These airborne geophysical surveys provide high-resolution and spatially comprehensive datasets characterizing the resistivity structure of the shallow subsurface of each survey region, accompanied by magnetic-field information over matching areas. These data were collected to provide insight into the distribution of groundwater brine in the Paradox Valley, the extent of clay aquitards in the San Luis Valley, and to improve our understanding of the geologic framework for both regions. This report describes these contracted surveys and releases digital data supplied under contract to the USGS.

  19. Commercial production of ethanol in the San Luis Valley, Colorado. Final Report

    SciTech Connect

    Hewlett, E.M.; Erickson, M.V.; Ferguson, C.D.; Sherwood, P.B.; Boswell, B.S.; Walter, K.M.; Hart, M.L.

    1983-07-01

    The purpose of this study is to assess the commercial feasibility of producing between 76 and 189 million liters (20 and 50 million gallons) of ethanol annually in the San Luis Valley, Colorado using geothermal energy as the primary heat source. The San Luis Valley is located in south-central Colorado. The valley is a high basin situated approximately 2316 meters (7600 feet) above sea level which contains numerous warm water wells and springs. A known geothermal resource area (KGRA) is located in the east-central area of the valley. The main industry in the valley is agriculture, while the main industry in the surrounding mountains is lumber. Both of these industries can provide feedstock for the production of ethanol.

  20. Commercial production of ethanol in the San Luis Valley, Colorado. Final report

    SciTech Connect

    Hewlett, E.M.; Erickson, M.V.; Ferguson, C.D.; Boswell, B.S.; Walter, K.M.; Hart, M.L.; Sherwood, P.B.

    1983-07-01

    The commercial feasibility of producing between 76 and 189 million liters (20 to 50 million gallons) of ethanol annually in the San Luis Valley, Colorado using geothermal energy as the primary heat source was assessed. The San Luis Valley is located in south-central Colorado. The valley is a high basin situated approximately 2316 meters (7600 feet) above sea level which contains numerous warm water wells and springs. A known geothermal resource area (IGRA) is located in the east-central area of the valley. The main industry in the valley is agriculture, while the main industry in the surrounding mountains is lumber. Both of these industries can provide feedstocks for the production of ethanol.

  1. Geologic Map of the San Luis Hills Area, Conejos and Costilla Counties, Colorado

    USGS Publications Warehouse

    Thompson, Ren A.; Machette, Michael N.

    1989-01-01

    This report is a digital image of the U.S. Geological Survey Miscellaneous Investigations Series Map I-1906, 'Geologic map of the San Luis Hills area, Conejos and Costilla Counties, Colorado,' which was published in 1989 by Thompson and Machette, scale 1:50,000 but has been unavailable in a digital version. The map area represents the southwestern portion of the Alamosa 30' x 60' quadrangle, which is currently being remapped by the U.S. Geological Survey. The northern and eastern margins of the San Luis Hills area have been remapped at greater detail and thus small portions of the map area have been updated. The northern margin is shown on U.S. Geological Survey Open-File Report 2005-1392, the northeastern portion is shown on U.S. Geological Survey Open-File Report 2008-1124, and the eastern margin is shown on U.S. Geological Survey Open-File Report 2007-1074. The most significant changes to the 1989 map area are recognition of Lake Alamosa and its deposits (Alamosa Formation), remapping of bedrock in the northeastern San Luis Hills, and redating of volcanic units in the San Luis Hills. Although unpublished, new 40Ar/39Ar ages for volcanic units in the Conejos and Hinsdale Formations add precision to the previous K/Ar-dated rocks, but do not change the basic chronology of the units. The digital version of this map was prepared by Theodore R. Brandt by scanning the original map at 300 pixels per inch, prior to creating the press-quality (96 Mb) and standard (5 Mb) .pdf files.

  2. Uranium series isotopes concentration in sediments at San Marcos and Luis L. Leon reservoirs, Chihuahua, Mexico

    SciTech Connect

    Méndez-García, C.; Montero-Cabrera, M. E.; Renteria-Villalobos, M.; García-Tenorio, R.

    2008-01-01

    Spatial and temporal distribution of the radioisotopes concentrations were determined in sediments near the surface and core samples extracted from two reservoirs located in an arid region close to Chihuahua City, Mexico. At San Marcos reservoir one core was studied, while from Luis L. Leon reservoir one core from the entrance and another one close to the wall were investigated. ²³²Th-series, ²³⁸U-series, ⁴⁰K and ¹³⁷Cs activity concentrations (AC, Bq kg⁻¹) were determined by gamma spectrometry with a high purity Ge detector. ²³⁸U and ²³⁴U ACs were obtained by liquid scintillation and alpha spectrometry with a surface barrier detector. Dating of core sediments was performed applying CRS method to ²¹⁰Pb activities. Results were verified by ¹³⁷Cs AC. Resulting activity concentrations were compared among corresponding surface and core sediments. High ²³⁸U-series AC values were found in sediments from San Marcos reservoir, because this site is located close to the Victorino uranium deposit. Low AC values found in Luis L. Leon reservoir suggest that the uranium present in the source of the Sacramento – Chuviscar Rivers is not transported up to the Conchos River. Activity ratios (AR) ²³⁴U/²³⁸U and ²³⁸U/²²⁶Ra in sediments have values between 0.9–1.2, showing a behavior close to radioactive equilibrium in the entire basin. ²³²Th/²³⁸U, ²²⁸Ra/²²⁶Ra ARs are witnesses of the different geological origin of sediments from San Marcos and Luis L. Leon reservoirs.

  3. Chytridiomycosis in endemic amphibians of the mountain tops of the Córdoba and San Luis ranges, Argentina.

    PubMed

    Lescano, Julián N; Longo, Silvana; Robledo, Gerardo

    2013-02-28

    Chytridiomycosis is a major threat to amphibian conservation. In Argentina, the pathogenic fungus Batrachochytrium dendrobatidis has been recorded in several localities, and recently, it was registered in amphibians inhabiting low-elevation areas of mountain environments in Córdoba and San Luis provinces. In the present study, we searched for B. dendrobatidis in endemic and non-endemic amphibians on the mountain tops of Córdoba and San Luis provinces. We collected dead amphibians in the upper vegetation belt of the mountains of Córdoba and San Luis. Using standard histological techniques, the presence of fungal infection was confirmed in 5 species. Three of these species are endemic to the mountain tops of both provinces. Although there are no reported population declines in amphibians in these mountains, the presence of B. dendrobatidis in endemic species highlights the need for long-term monitoring plans in the area.

  4. Biological structure and health implications from tooth size at Mission San Luis de Apalachee.

    PubMed

    Stojanowski, Christopher M; Larsen, Clark S; Tung, Tiffiny A; McEwan, Bonnie G

    2007-02-01

    This study analyzes dental metric variation to examine the biological structure of the native population at Mission San Luis de Apalachee, a late 17th century mission located in the Apalachee Province of Spanish colonial Florida. Three topics are addressed: (1) comparison of tooth sizes among adult and subadults, (2) analysis of the bio-spatial structure of skeletons within the church area, and (3) comparison of phenotypic profiles of individuals interred within coffins in the ritual nucleus of the church: the altar region. Analyses indicate that subadults had smaller average tooth sizes than adults for the posterior dentition that was particularly evident in mandibular nonpolar molars and premolars. This disparity, also documented in two other mission populations, likely represents ontogenetic stress and resulting increased mortality among those most at risk for early death. Analysis of the spatial structure of graves failed to document biological structuring by side of the aisle or by burial row, although some gross differences were evident when front, middle, and rear church burials were compared. Individuals buried in coffins within the same row were phenotypically similar to one another. However, inter-row comparisons indicated lack of phenotypic similarity among all coffin interments. These analyses suggest maintenance of kin-structured burial for elites alone within the San Luis community.

  5. Presence of Oxyodontherium (Macraucheniidae, Litopterna) in the Río Quinto Formation, San Luis (Argentina)

    NASA Astrophysics Data System (ADS)

    Cerdeño, Esperanza; Chiesa, Jorge; Ojeda, Guillermo

    2008-03-01

    This paper deals with the new mammal remains from the Río Quinto Formation, found at the Arroyo La Petra locality (San Luis, Argentina). They consist of an incomplete skull and two mandibular fragments of a macraucheniid, both with milk dentition and M1/m1 erupting, corresponding to a very young individual. Morfometrical characteristics of the specimens allow their identification as Oxyodontherium zeballosi and provide the first cranial data for this species. The holotype of this species is considered a juvenile individual. We maintain a conservative position in maintaining O. zeballosi as a valid species though based on juvenile specimens. However, a full systematic revision of the Family Macraucheniidae is needed to verify the validity and phylogenetic relationships of the taxa included in it. The identification of O. zeballosi indicates a late Miocene age for the fossiliferous level, which implies a cronoestratigraphic extension of the Río Quinto Formation, thus far considered as Pliocene in age. In addition, the presence of Oxyodontherium in San Luis Province increases the geographical distribution of this macrauchenid, whose record previously was limited to Miocene outcrops of the Paraná River (Entre Ríos Province). Its presence in the Mio-Pliocene beds of Uruguay is very doubtful because it is based on a metapodial.

  6. Novel High Efficiency Microcolumnar LuI3:Ce for Hard X-ray Imaging

    NASA Astrophysics Data System (ADS)

    Marton, Z.; Nagarkar, Vivek V.; Miller, Stuart R.; Brecher, Charles; Bhandari, Harish B.; Kenesei, Peter; Ross, Stephen K.; Almer, Jonathan D.; Singh, Bipin

    2014-03-01

    We have developed a structured scintillator using a vacuum deposition technique that is suitable for manufacturing large area scintillators in a microcolumnar form. While providing high absorption efficiency, it also allows great temporal and spatial resolution X-ray imaging. Microcolumnar films of extremely fast and bright cerium-doped lutetium iodide (LuI3:Ce) scintillator were synthesized. It has high density (~5.6 g/cm3), high effective atomic number (59.7), bright green emission (540 nm range, well matched to commercial optics and CCD sensors), light yield exceeding 115,000 ph/MeV, and rapid, afterglow-free decay (~28 ns). This new scintillator could resolve the 153 ns bunch structure of the Advanced Photon Source (APS) at Argonne National Laboratory (ANL). Due to the fast, afterglow-free decay, and high efficiency of LuI3:Ce, during the experiments performed at the 1-ID hard X-ray beamline at the APS, single 65 keV X-ray photons could be resolved with high signal-to-noise ratio and with temporal resolution better than 20ns. In the future, it will enable a wide range of hard X-ray (20 keV to 100 keV) imaging and/or high frame-rate applications such as dynamic studies of the structural and electrochemical properties of batteries using microtomographic X-ray imaging, internal corrosion in fuel cells, and time-resolved muscle diffraction experiments.

  7. Offshore geology and geomorphology from Point Piedras Blancas to Pismo Beach, San Luis Obispo County, California

    USGS Publications Warehouse

    Watt, Janet Tilden; Johnson, Samuel Y.; Hartwell, Stephen R.; Roberts, Michelle

    2015-01-01

    Sea level was approximately 120 to 130 m lower during the Last Glacial Maximum (about 21 ka). This approximate depth corresponds to the modern shelf break, a lateral change from the gently dipping (0.8° to 1.0°) outer shelf to the slightly more steeply dipping (about 1.5° to 2.5°) upper slope in the central and northern parts of the map area. South of Point San Luis in San Luis Bay, deltaic deposits offshore of the mouth of the Santa Maria River (11 km south of the map area) have prograded across the shelf break and now form a continuous low-angle (about 0.8°) ramp that extends to water depths of more than 160 m. The shelf break defines the landward boundary of slope deposits. North of Estero Bay, the shelf break is characterized by a distinctly sharp slope break that is mapped as a landslide headscarp above landslide deposits. Multibeam imagery and seismic-reflection profiles across this part of the shelf break show evidence of slope failure, such as slumping, sliding, and soft-sediment deformation, along the entire length of the scarp. Notably, this shelf-break scarp corresponds to a west splay of the Hosgri Fault that dies out just north of the scarp, suggesting that faulting is controlling the location (and instability) of the shelf break in this area.

  8. Differences and Commonalities: Farmer Stratifications in the San Luis Valley Research/Extension Project Area. ARE Research Report.

    ERIC Educational Resources Information Center

    Eckert, Jerry B.

    A research project in the San Luis Valley of Colorado sought to isolate a few unique farm types that could become target groups for the design and implementation of agricultural research and extension programs. Questionnaires were completed by 44 of 65 farmers in one watershed area of Conejos County. Analysis revealed a complex pattern of…

  9. 78 FR 16569 - Iowa Pacific Holdings, LLC, Permian Basin Railways, and San Luis & Rio Grande Railroad-Corporate...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-15

    ... Holdings, LLC (IPH), its wholly owned subsidiaries Permian Basin Railways (PBR) and San Luis & Rio Grande..., IPH is a noncarrier that wholly owns PBR, which directly controls seven Class III railroads.\\1\\ PBR... (Saratoga). In addition, PBR controls 80% of Cape Rail, Inc. (Cape Rail), a noncarrier railroad...

  10. Scientist as detective: Luis Alvarez and the pyramid burial chambers, the JFK assassination, and the end of the dinosaurs

    NASA Astrophysics Data System (ADS)

    Wohl, Charles G.

    2007-11-01

    Luis Alvarez (1911-1988) was one of the most brilliant and productive experimental physicists of the twentieth century. His investigations of three mysteries, all of them outside his normal areas of research, show what remarkable things a far-ranging imagination working with an immense store of knowledge can accomplish.

  11. Anomalous Representations of Reality in Luis Valdez's "The Shrunken Head of Pancho Villa" and "The Mummified Deer"

    ERIC Educational Resources Information Center

    Saborio, Linda

    2008-01-01

    Luis Valdez creates anomalous realities in two of his plays, "The Shrunken Head of Pancho Villa" and "The Mummified Deer," in order to defy dominant expressions of reality as well as classifications of "Chicano" and "Mexican." The anomalous realities, represented primarily by a bodiless head in the first play and an eighty-four-year-old Yaqui…

  12. More than Meets the Eye: Adult Education for Critical Consciousness in Luis Camnitzer's Art

    ERIC Educational Resources Information Center

    Zorrilla, Ana Carlina

    2012-01-01

    The purpose of this study was to explore the connection between art and adult education for critical consciousness through the conceptual art of Luis Camnitzer. The theoretical framework grounding this research was critical public pedagogy, influenced by both critical theory and Stuart Hall's systems of representation (1997). This framework…

  13. [Intradermal reactions with coccidioidins in different towns of San Luis Province].

    PubMed

    Bonardello, N M; de Gagliardi, C G

    1979-12-01

    Intradermal tests were used to determine the extent of the endemic zone of coccidioidomycosis in Argentina. We performed our endemiological study among school-aged children and grown-ups in San Luis city and in the following towns: Nogoli, Villa de la Quebrada, Balde, Salinas del Bebedero, Beazley, Fraga and Eleodoro Lobos. We employed three coccidioidins for each person--Negroni's coccidioidin, coloured coccidioidin and uncoloured coccidioidin. Reactions were usually read 48 h after inoculation. After inoculating 1,262 individuals we could read only 1,069 results. Overall, the positive reactors to one, two or three coccidioidins were 14.8%. We found no relation between positive reactors and the sex of subjects, but every group showed a noticeable relation between age and positive reactions, especially in older people. The positive reactors for each of the coccidioidins were as follows: Negroni coccidioidin: 10.1%: coloured coccidioidin: 4.9% and uncoloured coccidioidin: 5.0%.

  14. CONTRIBUTIONS TO RICKETTSIOSES RESEARCH IN COLOMBIA (1917-1943), LUIS B. PATIÑO CAMARGO

    PubMed Central

    FACCINI-MARTÍNEZ, Álvaro A.; BOTERO-GARCÍA, Carlos A.; HIDALGO, Marylin

    2016-01-01

    Colombian physician Luis Benigno Patiño Camargo was one of the pioneers in the study of rickettsioses in South America, demonstrating for the first time in Colombia the presence of Rickettsia rickettsii as the etiological agent of a highly deadly exanthematic febrile syndrome in the 1930s. However, Patiño-Camargo performed other investigations from 1917-1943, which represent the first descriptions and scientific evidence of the presence of R. prowazekii and R. typhi in Colombia. Almost 60 years after the latest research conducted by Dr. Patiño-Camargo, rickettsioses were again a matter of interest and research. In the last decade over 20 research studies have been published, showing new endemic areas for R. rickettsii, as well as the description of new rickettsial species in Colombia. PMID:27074327

  15. Measured performance results: low-cost solar water heating systems in the San Luis Valley

    SciTech Connect

    Swisher, J.

    1983-01-01

    The measured performance of seven low-cost solar water heating systems in the San Luis Valley of southern Colorado is summarized. During the summer and fall of 1981, SERI monitored a variety of low-cost solar water heating system designs and components. Five systems had site-built collectors, and four included low-cost tank-in-jacket heat exchanger/storage tank components. Two were air-to-water systems. The five liquid-based systems included a drain-down design, a propylene glycol-charged thermosiphon system, and three pumped-glycol systems. The pumped-liquid systems performed the best, with system efficiencies greater than 20% and solar fractions between 40% and 70%. Tjhe air-to-water systems did not perform as well because of leakage in the collectors and heat exchangers. The thermosiphon system performed at lower efficiency because the collector flows were low.

  16. Land disposal of San Luis drain sediments: Progress Report October 1998 through November 2000

    SciTech Connect

    Zawislanski, P.T.; Benson, S.M.; TerBerg, R.; Borglin, S.E.

    2001-06-01

    Lawrence Berkeley National Laboratory (LBNL), in collaboration with the US Bureau of Reclamation and the Panoche Water District, is conducting a pilot-scale test of the viability of land application of selenium (Se)-enriched San Luis Drain (SLD) sediments. Local land disposal is an attractive option due to its low cost and the proximity of large areas of available land. Two modes of disposal are being tested: (1) the application to a nearby SLD embankment, and (2) the application to and incorporation with nearby farm soils. The study of these options considers the key problems which may potentially arise from this approach. These include disturbance of SLD sediments during dredging, resulting in increased downstream Se concentrations; movement of the land-applied Se to the groundwater; increased exposure to the biota; and reduced productivity of farm crops. This report describes field and laboratory activities carried out from 1998 through November 2000, as well as the results of these investigations.

  17. CONTRIBUTIONS TO RICKETTSIOSES RESEARCH IN COLOMBIA (1917-1943), LUIS B. PATIÑO CAMARGO.

    PubMed

    Faccini-Martínez, Álvaro A; Botero-García, Carlos A; Hidalgo, Marylin

    2016-01-01

    Colombian physician Luis Benigno Patiño Camargo was one of the pioneers in the study of rickettsioses in South America, demonstrating for the first time in Colombia the presence of Rickettsia rickettsii as the etiological agent of a highly deadly exanthematic febrile syndrome in the 1930s. However, Patiño-Camargo performed other investigations from 1917-1943, which represent the first descriptions and scientific evidence of the presence of R. prowazekii and R. typhi in Colombia. Almost 60 years after the latest research conducted by Dr. Patiño-Camargo, rickettsioses were again a matter of interest and research. In the last decade over 20 research studies have been published, showing new endemic areas for R. rickettsii, as well as the description of new rickettsial species in Colombia.

  18. Virucidal activity of essential oils from aromatic plants of San Luis, Argentina.

    PubMed

    García, C C; Talarico, L; Almeida, N; Colombres, S; Duschatzky, C; Damonte, E B

    2003-11-01

    Essential oils obtained from eight aromatic plants of San Luis Province, Argentina, were screened for virucidal activity against herpes simplex virus type 1 (HSV-1), Junin virus (JUNV) and dengue virus type 2 (DEN-2). The most potent inhibition was observed with the essential oil of Lippia junelliana and Lippia turbinata against JUNV with virucidal concentration 50% (VC(50)) values in the range 14-20 ppm, whereas Aloysia gratissima, Heterotheca latifolia and Tessaria absinthioides inhibited JUNV in the range 52-90 ppm. The virucidal activity was time- and temperature-dependent. The essential oils of A. gratissima, Artemisia douglasiana, Eupatorium patens and T. absinthioides inactivated HSV-1 at 65-125 ppm. However, only A. douglasiana and E. patens had any discernible effect on DEN-2 infectivity with VC(50) values of 60 and 150 ppm, respectively. PMID:14595590

  19. Amoebological study of the atmosphere of San Luis Potosi, SLP, Mexico.

    PubMed

    Rodriguez-Zaragoza, S; Rivera, F; Bonilla, P; Ramirez, E; Gallegos, E; Calderon, A; Ortiz, R; Hernandez, D

    1993-01-01

    A one year round survey was conducted for isolation of free living amoebae (FLA) in the city of San Luis Potosi, (SLP), Mexico, which is placed in a desert environment. Samples were taken by modified impinger method and cultivated in laboratory conditions for FLA isolation following a week period of rehidration. 57 strains were isolated, 39% belonged to Acanthamoeba genus (which is important because it bears opportunistic pathogens that produce amoebic keratitis and granulomatous amoebic encephalitis in humans), 16% to Hartmannella, 9% to Vahlkampfia and the other proportion was divided among 6 other genera. The isolations were more abundant during dry season and the main genera were present in all four stands. The difference among them was the species variety which is discused as connected with abundance of organic wastes and lack of urbanization near the stations.

  20. Archaeometry of pre-Hispanic pottery from San Luis Potosi, México

    NASA Astrophysics Data System (ADS)

    Tenorio, D.; Jiménez-Reyes, M.; Cabral-Prieto, A.; Siles-Dotor, M. G.; Flores-Ramírez, H.; Galván-Madrid, J. L.

    2000-11-01

    Neutron activation analysis, Mössbauer spectroscopy and X-ray diffraction techniques were used to characterize pre-Hispanic potsherds and modern ceramic pottery, samples of which were collected in Tenexco, San Luis Potosi, Mexico. Elementary and spectroscopic analysis showed differences between ancient and modern ceramics. While the modern ceramics studied were practically new and not used at all, the ancient ones were probably used in domestic or ceremonial activities. Besides, the latter were kept buried for a long time, and it is quite probable that their manufacture was also slightly different from that of the former. These assumptions could provide the clues to understand some of the observed differences between the composition of ancient and modern ceramics whose raw materials may have the same origin.

  1. Hydrogeologic Assessment of the East Bear Creek Unit, San LuisNational Wildlife Refuge

    SciTech Connect

    Quinn, Nigel W.T.

    2007-07-15

    San Luis National Wildlife Refuge Complex to meetReclamation s obligations for Level 4 water supply under the CentralValley Project Improvement Act. Hydrogeological assessment of the EastBear Creek Unit of the San Luis National Wildlife Refuge was conductedusing a combination of field investigations and a survey of availableliterature from past US Geological Survey Reports and reports by localgeological consultants. Conservative safe yield estimates made using theavailable data show that the East Bear Creek Unit may have sufficientgroundwater resources in the shallow groundwater aquifer to meet aboutbetween 25 percent and 52 percent of its current Level II and between 17percent and 35 percent of its level IV water supply needs. The rate ofsurface and lateral recharge to the Unit and the design of the well fieldand the layout and capacity of pumped wells will decide both thepercentage of annual needs that the shallow aquifer can supply andwhether this yield is sustainable without affecting long-term aquiferquality. In order to further investigate the merits of pumping the nearsurface aquifer, which appears to have reasonable water quality for usewithin the East Bear Creek Unit -- monitoring of the potential sources ofaquifer recharge and the installation of a pilot shallow well would bewarranted. Simple monitoring stations could be installed both upstreamand downstream of both the San Joaquin River and Bear Creek and beinstrumented to measureriver stage, flow and electrical conductivity.Ideally this would be done in conjunction with a shallow pilot well,pumped to supply a portion of the Unit's needs for the wetland inundationperiod.

  2. Genesis of sulfide-rich chromite ores by the interaction between chromitite and pegmatitic olivine-norite dikes in the Potosí Mine (Moa-Baracoa ophiolitic massif, eastern Cuba)

    NASA Astrophysics Data System (ADS)

    Proenza, J.; Gervilla, F.; Melgarejo, J.; Vera, O.; Alfonso, P.; Fallick, A.

    2001-10-01

    The Potosí Mine is located in the Moa-Baracoa massif in the easternmost part of the Cuban Ophiolitic Belt. Chromite mineralization occurs within the mantle-crust transition zone. Two events of magma intrusion overprint the chromitite bodies: one gave rise to the crystallization of pegmatitic olivine-norite dikes, and the other produced pegmatitic gabbro dikes. Sulfide-poor chromite ores, brecciated chromite ores, and sulfide-rich chromite ores can be distinguished in the different chromitite bodies. Sulfide-poor ores represent more than 80 vol% of the chromitites. This type occurs far from the zones intruded by pegmatitic gabbro dikes and shows petrographic and chemical features similar to other chromitite bodies described in the Moa-Baracoa massif. Brecciated chromite ores occur within pegmatitic gabbro dikes. In this type, chromite crystals occur included within chromian diopside and plagioclase. These silicates often contain droplet-like sulfide aggregates. Sulfide-rich ores are spatially associated to the contacts between sulfide-poor chromite and pegmatitic olivine-norite dikes. These ores mainly consist of recrystallized (coarse) chromite with interstitial pyrrhotite, pentlandite, cubanite, and chalcopyrite. Chromite from sulfide-rich ores exhibits TiO2, FeO, V2O3, MnO, and especially, Fe2O3 contents, higher than those of chromite from brecciated ores and much higher than those of chromite from sulfide-poor ores. The sulfide-rich ores are PGE-rich (up to 1,113 ppb of total PGE), and show nearly flat chondrite-normalized PGE patterns, slightly above 0.1 times chondritic values. Mineralogical and chemical data indicate that the chromite ores of the Potosí Mine were modified by the intrusions of olivine-norite and gabbro dikes. The interaction between pre-existing sulfide-poor chromite ores and the intruding volatile-rich silicate melts produced strong brecciation, partial dissolution, and recrystallization (coarsening) of chromite. The sulfide assemblage

  3. Introduction to the Special Collection of Papers on the San Luis Basin Sustainability Metrics Project: A Methodology for Evaluating Regional Sustainability

    EPA Science Inventory

    This paper introduces a collection of four articles describing the San Luis Basin Sustainability Metrics Project. The Project developed a methodology for evaluating regional sustainability. This introduction provides the necessary background information for the project, descripti...

  4. Transient Electromagnetic Soundings Near Great Sand Dunes National Park and Preserve, San Luis Valley, Colorado (2006 Field Season)

    USGS Publications Warehouse

    Fitterman, David V.; de Sozua Filho, Oderson A.

    2009-01-01

    Time-domain electromagnetic (TEM) soundings were made near Great Sand Dunes National Park and Preserve in the San Luis Valley of southern Colorado to obtain subsurface information of use to hydrologic modeling. Seventeen soundings were made to the east and north of the sand dunes. Using a small loop TEM system, maximum exploration depths of about 75 to 150 m were obtained. In general, layered earth interpretations of the data found that resistivity decreases with depth. Comparison of soundings with geologic logs from nearby wells found that zones logged as having increased clay content usually corresponded with a significant resistivity decrease in the TEM determined model. This result supports the use of TEM soundings to map the location of the top of the clay unit deposited at the bottom of the ancient Lake Alamosa that filled the San Luis Valley from Pliocene to middle Pleistocene time.

  5. Visual Resource Analysis for Solar Energy Zones in the San Luis Valley

    SciTech Connect

    Sullivan, Robert; Abplanalp, Jennifer M.; Zvolanek, Emily; Brown, Jeffery

    2016-01-01

    This report summarizes the results of a study conducted by Argonne National Laboratory’s (Argonne’s) Environmental Science Division for the U.S. Department of the Interior Bureau of Land Management (BLM). The study analyzed the regional effects of potential visual impacts of solar energy development on three BLM-designated solar energy zones (SEZs) in the San Luis Valley (SLV) in Colorado, and, based on the analysis, made recommendations for or against regional compensatory mitigation to compensate residents and other stakeholders for the potential visual impacts to the SEZs. The analysis was conducted as part of the solar regional mitigation strategy (SRMS) task conducted by BLM Colorado with assistance from Argonne. Two separate analyses were performed. The first analysis, referred to as the VSA Analysis, analyzed the potential visual impacts of solar energy development in the SEZs on nearby visually sensitive areas (VSAs), and, based on the impact analyses, made recommendations for or against regional compensatory mitigation. VSAs are locations for which some type of visual sensitivity has been identified, either because the location is an area of high scenic value or because it is a location from which people view the surrounding landscape and attach some level of importance or sensitivity to what is seen from the location. The VSA analysis included both BLM-administered lands in Colorado and in the Taos FO in New Mexico. The second analysis, referred to as the SEZ Analysis, used BLM visual resource inventory (VRI) and other data on visual resources in the former Saguache and La Jara Field Offices (FOs), now contained within the San Luis Valley FO (SLFO), to determine whether the changes in scenic values that would result from the development of utility-scale solar energy facilities in the SEZs would affect the quality and quantity of valued scenic resources in the SLV region as a whole. If the regional effects were judged to be significant, regional

  6. Pliocene and Pleistocene geologic and climatic evolution in the San Luis Valley of south-central Colorado

    USGS Publications Warehouse

    Rogers, K.L.; Larson, E.E.; Smith, G.; Katzman, D.; Smith, G.R.; Cerling, T.; Wang, Y.; Baker, R.G.; Lohmann, K.C.; Repenning, C.A.; Patterson, P.; Mackie, G.

    1992-01-01

    Sediments of the Alamosa Formation spanning the upper part of the Gauss and most of the Matuyama Chrons were recovered by coring in the high (2300 m) San Luis Valley of south-central Colorado. The study site is located at the northern end of the Rio Grande rift. Lithologic changes in the core sediments provide evidence of events leading to integration of the San Luis drainage basin into the Rio Grande. The section, which includes the Huckleberry Ridge Ash (2.02 Ma) and spans the entire Matuyama Chron, contains pollen, and invertebrate and vertebrate fossils. Stable isotope analyses of inorganic and biogenic carbonate taken over most of the core indicate substantially warmer temperatures than occur today in the San Luis Valley. At the end of the Olduvai Subchron, summer precipitation decreased, summer pan evaporation increased, and temperatures increased slightly compared to the earlier climate represented in the core. By the end of the Jaramillo Subchron, however, cold/wet and warm/dry cycles become evident and continue into the cold/wet regime associated with the deep-sea oxygen-isotope Stage 22 glaciation previously determined from outcrops at the same locality. Correspondence between the Hansen Bluff climatic record and the deep-sea oxygen-isotope record (oxygen-isotope stages from about 110-18) is apparent, indicating that climate at Hansen Bluff was responding to global climatic changes. ?? 1992.

  7. Quality of ground water in agricultural areas of the San Luis Valley, south-central Colorado

    USGS Publications Warehouse

    Edelmann, Patrick; Buckles, D.R.

    1984-01-01

    The quality of ground water in the principal agricultural areas of the San Luis Valley, south-central Colorado was evaluated using chemical analyses of water collected from 57 wells completed in the unconfined aquifer and from 25 wells completed in the confined aquifer. Ground water in both aquifers generally contains dissolved-solids concentrations of less than 500 milligrams per liter. In most areas, calcium is the principal cation in the ground water. Nitrite plus nitrate concentrations expressed as nitrogen, are generally less than 1 milligram per liter. However, the quality of ground water in certain areas may pose health and agricultural hazards. Water in the unconfined aquifer near Center contains high nitrite plus nitrate as nitrogen concentrations. The highest measured concentration in this area was 33 milligrams per liter. Water containing more than 1 milligram per liter of nitrite as nitrogen, or 10 milligrams per liter nitrate, as nitrogen, poses a potential health hazard for infants and should not be used for drinking. In addition, dissolved-solids concentration in the ground water in some areas is greater than 500 milligrams per liter and, if used for irrigation may reduce crop yields. (USGS)

  8. Problems related to water quality and algal control in Lopez Reservoir, San Luis Obispo County, California

    USGS Publications Warehouse

    Fuller, Richard H.; Averett, Robert C.; Hines, Walter G.

    1975-01-01

    A study to determine the present enrichment status of Liopez Reservoir in San Luis Obispo county, California, and to evaluate copper sulfate algal treatment found that stratification in the reservoir regulates nutrient release and that algal control has been ineffective. Nuisance algal blooms, particularly from March to June, have been a problem in the warm multipurpose reservoir since it was initially filled following intense storms in 1968-69. The cyanophyte Anabaena unispora has been dominant; cospecies are the diatoms Stephanodiscus astraea and Cyclotella operculata, and the chlorophytes Pediastrum deplex and Sphaerocystis schroeteri. During an A. unispora bloom in May 1972 the total lake surface cell count was nearly 100,000 cells/ml. Thermal stratification from late spring through autumn results in oxygen deficiency in the hypolimnion and metalimnion caused by bacterial oxidation of organic detritus. The anaerobic conditions favor chemical reduction of organic matter, which constitute 10-14% of the sediment. As algae die, sink to the bottom, and decompose, nutrients are released to the hypolimnion , and with the autumn overturn are spread to the epilimnion. Algal blooms not only hamper recreation, but through depletion of dissolved oxygen in the epilimnion may have caused periodic fishkills. Copper sulfate mixed with sodium citrate and applied at 1.10-1.73 lbs/acre has not significantly reduced algal growth; a method for determining correct dosage is presented. (Lynch-Wisconsin)

  9. Agricultural producers' perceptions of sandhill cranes in the San Luis Valley of Colorado

    USGS Publications Warehouse

    Laubhan, M.K.; Gammonley, J.H.

    2001-01-01

    Management for migratory birds at an ecosystem scale requires forming cooperative partnerships with the private sector. To be effective, however, wildlife managers must understand the economic and social attitudes of private landowners to ensure that strategies involving stakeholders are viable and can be implemented. We documented attitudes of farmers in the San Luis Valley (SLV) of Colorado toward Rocky Mountain Population greater sandhill cranes (Grus canadensis tabida) using a self administered, mail-back survey. Overall response rate was 46.7%. Viewing sandhill cranes in the SLV was considered somewhat important or important by 78.6% of respondents. In contrast, only 62.1% of respondents indicated that viewing sandhill cranes was somewhat important or important on their own land. Farmers' attitudes toward viewing sandhill cranes on their own property were related (P=0.02) to perceived conflicts with crop production. The extent of crane use (P=0.04) was the only variable we tested that predicted whether conflicts were reported. Our results suggest that partnerships between farmers and natural resource agencies concerned with management of sandhill cranes may be viable. However, the role of farmers in any proposed management strategy must be examined carefully because there may be an upper limit of crane use on private land that farmers will tolerate.

  10. Land disposal of San Luis drain sediments, Panoche Water District, South Dos Palos, California

    SciTech Connect

    Zawislanski, Peter; Benson, Sally; TerBerg, Robert; Borglin, Sharon

    2002-07-01

    Lawrence Berkeley National Laboratory (LBNL), LFR Levine-Fricke (LFR), the U.S. Bureau of Reclamation (USBR) and the Panoche Water District, have completed a pilot-scale test of the viability of land application of selenium- (Se-) enriched San Luis Drain (SLD) sediments. The project was initiated in October 1998 by LBNL. LFR assumed the role of primary subcontractor on the project in July 2001. Substantial portions of this report, describing work performed prior to November 2000, were previously prepared by LBNL personnel. The data set, findings, and recommendations are herein updated with information collected since November 2000. Local land disposal is an attractive option due to its low cost and the proximity of large areas of available land. Two modes of disposal are being tested: (1) the application to a nearby SLD embankment, and (2) the application to and incorporation with nearby farm soils. The study of these options considers the key problems that may potentially arise from this approach. These include disturbance of SLD sediments during dredging, resulting in increased downstream Se concentrations; movement of the land-applied Se to groundwater; reduced productivity of farm crops; and Se uptake by wild and crop plants. This report describes field and laboratory activities carried out from 1998 through February 2002, and results of these investigations.

  11. Patterns of food abundance for breeding waterbirds in the san luis valley of Colorado

    USGS Publications Warehouse

    Gammonley, J.H.; Laubhan, M.K.

    2002-01-01

    We measured the amount and distribution of macroinvertebrates and seeds in four wetland habitats (short emergent, seasonal open water, semipermanent/permanent open water, and saltgrass [Distichlis spicata]) used by breeding ducks and shorebirds at a wetland complex in the San Luis Valley, Colorado, USA. Density of macroinvertebrates did not differ among habitats or sampling periods (P = 0.45), but dry mass, crude protein, and gross energy production were greater (P < 0.05) in short emergent than in other habitats. These differences were largely due to the greater dry mass of gastropods in short emergent than in other habitats. Total seed density, dry mass, crude protein, and gross energy differed among habitats and periods with interaction effects (P <0.01). Although seed abundance varied among habitats and sampling periods, abundance was greatest in short emergent during all sampling periods. Breeding waterbirds consumed a variety of macroinvertebrates and seeds on the study area. Patterns of abundance among habitats of macroinvertebrates and seeds consumed by six waterbird species were not consistent with patterns of foraging habitat use by most ducks and shorebirds at this wetland complex. Our results indicate that estimates of food or nutrient abundance are useful in assessing the functional role of broad habitat types, but factors other than food abundance also influence avian selection of wetland foraging habitats. ?? 2002, The Society of Wetland Scientists.

  12. Impact of Hurricane Luis on the health services of Antigua and Barbuda.

    PubMed

    Gibbs, T; van Alphen, D

    1996-01-01

    Antigua and Barbuda, located in the Caribbean, was one of the countries most affected by Hurricane Luis in 1995. Electricity, water supply and health facilities were disrupted for several weeks. Inadequate criteria at the design stages, unsound structural design, and lack of maintenance of building components, are some of the reasons that damage was so severe. The main hospitals and 6 health facilities were destroyed and flooded and most of the medical staff had to cope with their own damaged houses. Although the knowledge and materials are available to reduce the losses caused by hurricanes, building codes are not reinforced by laws and preventive maintenance to protect health care facilities from natural hazard damage is not usually budgeted for. The additional cost of making a single or two-storey health facility almost invulnerable to future catastrophe in a hurricane is only 2% in initial capital cost and becomes negligible when spread over the life of a building. The effort of UN International Decade for Natural Disasters (IDNDR) directed towards disaster mitigation should be increased over the remainder of the decade to ensure that standards are respected and building codes are mandatory.

  13. A geophysical study of the hydrogeology of the Carrizo plain area, San Luis Obispo County, California

    SciTech Connect

    Cooper, J.W. )

    1991-02-01

    This investigation was conducted to attempt to locate structural geologic features and variations in aquifer characteristics in an area within the Carrizo plain, San Luis Obispo County, California. The investigation included a review of the established geologic knowledge for the region, followed by field studies. The field studies included surface magnetometer surveys, thermal borehole logging, and a piezometric level survey. Existing borehole electric logs were obtained. The conclusions of the investigation were then derived from a collective interpretation. The investigation concluded that a fault appears to extend beneath the valley fill in the northwestern part of the area, and that a subsurface basaltic dike is apparently located in the southeastern part of the area. Evaluations indicate that the valley has a deep aquifer overlain by a confining clay-rich layer in the central part of the area. Areal and depth-related variations in water quality are probably influenced by the presence of evaporites near Soda Lake and in the region near the San Andreas fault.

  14. Tracing groundwater recharge in the San Luis Valley, Colorado: Groundwater contamination susceptibility in an agricultural watershed

    NASA Astrophysics Data System (ADS)

    Patel, Tanya; Hindshaw, Ruth; Singer, Michael

    2015-04-01

    Water is a vital resource in any agricultural watershed, yet in the arid western United States farming practices threaten the quality and availability of groundwater. This is a pressing concern in the San Luis Valley, southern Colorado, where agriculture comprises 30% of the local economy, and employs over half the valley population. Although 54 % of the water used for irrigation is surface water, farmers do not usually apply this water directly to their fields. Instead, the water is often diverted into pits which recharge the aquifer, and the water is subsequently pumped during the following irrigation season. The Rio Grande Water Conservation District recognises that recharge to the unconfined aquifer has been outpaced by commercial irrigation for at least four decades, resulting in a decline in groundwater levels. Recycled irrigation water, and leakage from unlined canals now represent the greatest recharge contribution to the unconfined aquifer in this region. This makes the shallow groundwater particularly susceptible to agricultural contamination. The purpose of this study is to assess groundwater contamination in the unconfined and upper confined aquifers of the San Luis Valley, which are the most susceptible to contamination due to their close proximity to the surface. Although concentrations of potentially harmful contaminants from agricultural runoff are regularly monitored, the large spatial and temporal fluctuations in values make it difficult to determine long-term trends. We have analysed δ18O, δ2H and major-ion chemistry of 57 groundwater, stream and precipitation samples, collected in June 2014, and interpreted them alongside regional stream flow data and groundwater levels. This will allow us to study the seasonality and locality of groundwater recharge to provide greater insight into the watershed's potential for pollution. A groundwater vulnerability assessment was performed using the model DRASTIC (Depth to water, Recharge, Aquifer media, Soil

  15. Green Net Regional Product for the San Luis Basin, Colorado: an economic measure of regional sustainability.

    PubMed

    Heberling, Matthew T; Templeton, Joshua J; Wu, Shanshan

    2012-11-30

    This paper presents the data sources and methodology used to estimate Green Net Regional Product (GNRP), a green accounting approach, for the San Luis Basin (SLB). We measured the movement away from sustainability by examining the change in GNRP over time. Any attempt at green accounting requires both economic and natural capital data. However, limited data for the Basin requires a number of simplifying assumptions and requires transforming economic data at the national, state, and county levels to the level of the SLB. Given the contribution of agribusiness to the SLB, we included the depletion of both groundwater and soil as components in the depreciation of natural capital. We also captured the effect of the consumption of energy on climate change for future generations through carbon dioxide (CO(2)) emissions. In order to estimate the depreciation of natural capital, the shadow price of water for agriculture, the economic damages from soil erosion due to wind, and the social cost of carbon emissions were obtained from the literature and applied to the SLB using benefit transfer. We used Colorado's total factor productivity for agriculture to estimate the value of time (i.e., to include the effects of exogenous technological progress). We aggregated the economic data and the depreciation of natural capital for the SLB from 1980 to 2005. The results suggest that GNRP had a slight upward trend through most of this time period, despite temporary negative trends, the longest of which occurred during the period 1985-86 to 1987-88. However, given the upward trend in GNRP and the possibility of business cycles causing the temporary declines, there is no definitive evidence of moving away from sustainability.

  16. Selenium volatilization in vegetated agricultural drainage sediment from the San Luis Drain, Central California.

    PubMed

    Bañuelos, G S; Lin, Z-Q; Arroyo, I; Terry, N

    2005-09-01

    The presence of large amounts of Se-laden agricultural drainage sediment in the San Luis Drain, Central California, poses a serious toxic threat to wildlife in the surrounding environment. Effective management of the drainage sediment becomes a practical challenge because the sediment is polluted with high levels of Se, B, and salts. This two-year field study was conducted to identify the best plant species that are salt and B tolerant and that have a superior ability of volatilizing Se from drainage sediment. The drainage sediment was mixed with clean soil, and vegetated with salado alfalfa (Medicago sativa 'salado'), salado grass (Sporobulus airoides 'salado'), saltgrass-turf (Distichlis spp. 'NYPA Turf'), saltgrass-forage (Distichlis spicata (L.) Greene), cordgrass (Spartina patens 'Flageo'), Leucaenia (Leucaena leucocephola), elephant grass (Pennistum purpureum), or wild type-Brassica (Brassica spp.). Results show that elephant grass produced the greatest amount of biomass and accumulated highest concentrations of B. Highest concentrations of Se, S, and Cl were observed in wild-type Brassica. Biogenic volatilization of Se by plants and soil microbes was greater in summer. Among the treatments, the mean daily rates of Se volatilization (microg Se m(-2)d(-1)) were wild-type Brassica (39) > saltgrass-turf (31) > cordgrass (27) > saltgrass forage (24) > elephant grass (22) > salado grass (21) > leucaenia (19) > salado alfalfa (14) > irrigated bare soil (11) > non-irrigated bare soil (6). Overall, rates of Se volatilization in drainage sediment were relatively low due to high levels of sulfate. To manage Se in drainage sediment by phytoremediation, the biological volatilization process needs to be enhanced substantially under field conditions.

  17. Sedimentary record of storm deposits from Hurricane Ike, Galveston and San Luis Islands, Texas

    NASA Astrophysics Data System (ADS)

    Hawkes, A. D.; Horton, B. P.

    2012-10-01

    Prehistoric records of land-falling tropical cyclones further our understanding of the spatial and temporal variability of tropical cyclone activity and its relationship with global climatic changes. Here, we describe deposit stratigraphy and sedimentology resulting from overwash during Hurricane Ike, which made landfall on September 13th 2008, to provide a much needed modern analogue for paleo-hurricane deposits and evaluate the hurricane's influence on barrier stability. We compared the volume, grain size distribution, organic content and foraminiferal assemblages of washover deposits at three sites from Galveston and San Luis Islands, Texas that were up to 50 km west of Ike's landfall. Storm surge heights varied between 3.7 and 2.7 m with inland inundation extents of 330 to 113 m. At each of the study sites, Hurricane Ike eroded the shoreline and re-deposited a landward-thinning sand sheet between 0.02 and 0.28 m thick over short-grass prairie/salt-marsh soil. Shoreline erosion estimates suggest that only between 10 and 30% of eroded beach sediment is deposited on land as washover (net gain to barrier elevation), while the remainder is re-deposited subtidally or offshore, a potential net loss to the coastal sediment budget. The washover sediment was readily identifiable by abrupt changes in grain size, organic content, and buried in situ grasses. Foraminiferal assemblages within washover and short-grass prairie/salt-marsh sediments (when present) have similar assemblages, which are dominated by Ammonia spp. and Elphidium spp. These species are common to bay and nearshore environments of the Gulf of Mexico. Foraminiferal species Bolivina subaenariensis, Quinqueloculina seminulum and planktonic species are restricted to the washover deposits, which may suggest sediment provenance from inner shelf environments.

  18. Green Net Regional Product for the San Luis Basin, Colorado: an economic measure of regional sustainability.

    PubMed

    Heberling, Matthew T; Templeton, Joshua J; Wu, Shanshan

    2012-11-30

    This paper presents the data sources and methodology used to estimate Green Net Regional Product (GNRP), a green accounting approach, for the San Luis Basin (SLB). We measured the movement away from sustainability by examining the change in GNRP over time. Any attempt at green accounting requires both economic and natural capital data. However, limited data for the Basin requires a number of simplifying assumptions and requires transforming economic data at the national, state, and county levels to the level of the SLB. Given the contribution of agribusiness to the SLB, we included the depletion of both groundwater and soil as components in the depreciation of natural capital. We also captured the effect of the consumption of energy on climate change for future generations through carbon dioxide (CO(2)) emissions. In order to estimate the depreciation of natural capital, the shadow price of water for agriculture, the economic damages from soil erosion due to wind, and the social cost of carbon emissions were obtained from the literature and applied to the SLB using benefit transfer. We used Colorado's total factor productivity for agriculture to estimate the value of time (i.e., to include the effects of exogenous technological progress). We aggregated the economic data and the depreciation of natural capital for the SLB from 1980 to 2005. The results suggest that GNRP had a slight upward trend through most of this time period, despite temporary negative trends, the longest of which occurred during the period 1985-86 to 1987-88. However, given the upward trend in GNRP and the possibility of business cycles causing the temporary declines, there is no definitive evidence of moving away from sustainability. PMID:22483369

  19. [Luis Alfredo Garavito Cubillos: criminal and legal aspects of serial homicide with over 200 victims].

    PubMed

    Benecke, Mark; Rodriguez y Rowinski, Miguel

    2002-01-01

    This is the first scientific report on the crimes of the homosexual paedophile sadist Luis Alfredo Garavito Cubillos, based on a research stay of the authors in Columbia, and including discussions with the investigators, and the offender. Between 1992 and 1999, Garavito killed more than 200 children in the core age span between 8 and 13 years (as an exception, 6 to 16 years). His modus operandi remained stable. During daytime, he lured children of a lower social status out of crowded parts of the city into hidden areas that were overgrown with high plants. Garavito promised either payment for easy work, or drugs, or made other socially believable offers. The children were tied up, tortured, raped, and killed by at least one cut in the lateral part of the neck, or by decapitation. During the killings, Garavito was drunk. Even after his arrest (for attempted sexual abuse under a wrong identity) it was not immediately possible to track his crimes since Garavito had frequently changed his places of stay and his jobs. He also grew different hairdos and used wrong names. During his still ongoing confessions, he directs the investigators correctly to all scenes of crime spread over large parts of Columbia. In our report, we give an overview over the course of investigations, hint to similarities in the cases of the German serial killer Denke (1920's) and homosexual paedophile serial killer Jürgen Bartsch (1960's), and give preliminary impressions on the offender's personality. Furthermore, the violent environment and juridical peculiarities in Columbia are discussed. In spite of a total penalty of 2600 years in prison, it is formally well possible that Garavito will be released out of prison within the next 10 to 20 years, i.e. even before the maximum sentence of 40 years will be over. PMID:12462935

  20. Shoreline and Oceano Fault Zones' Intersection Geometry, San Luis Obispo Bay, Offshore South Central Coastal California

    NASA Astrophysics Data System (ADS)

    Hogan, P. J.; Nishenko, S. P.; Greene, H. G.; Bergkamp, B.

    2015-12-01

    As part of the Central Coastal California Seismic Imaging Project, high-resolution 3D low energy marine seismic-reflection data were acquired within San Luis Obispo Bay in 2011 and 2012. Mapping of the sediment-buried bedrock surface using 2D and 3D data clearly reveals that the trace of the Shoreline fault zone bifurcates at Souza Rock. The eastern strand is a reverse fault that trends toward the east-southeast, connecting with the Oceano fault zone onshore. The Shoreline fault is a vertical dextral fault with a very linear geometry that continues south to near the Santa Maria river mouth, and may intersect the Casmalia fault onshore. Both of these fault strands are crossed by Pleistocene low-stand paleochannels eroded into bedrock, and are buried by marine and non-marine sediment. The 3D data show that both the Oceano and Shoreline faults are narrow, well defined fault zones. The reverse slip rate for the Oceano fault (~0.1 mm/y.) falls within published slip rate estimates for the Oceano fault onshore (0.01-0.20 mm/y). The dextral slip rate for the Shoreline fault southeast of Souza Rock is estimated to be 0.06 mm/y. Souza Rock is located on the hanging wall of the Oceano Fault, north of the point of intersection between the Shoreline and Oceano faults. Water depths shoal from 60 m on the surrounding seafloor to 5 m on top of Souza Rock. This structure is interpreted as a structural popup in a restraining bend where the N65°W-trending Oceano fault intersects the N25°W-trending Shoreline fault. The structural geometry near the point of intersection has several minor secondary fault strands, but is remarkably simple.

  1. Scanning electron microscope and statistical analysis of suspended heavy metal particles in San Luis Potosi, Mexico

    NASA Astrophysics Data System (ADS)

    Piña, A. Aragón; Villaseñor, G. Torres; Fernández, M. Monroy; Luszczewski Kudra, A.; Leyva Ramos, R.

    Three hundred samples of urban aerosol were collected in high-volume samplers from five urban locations situated near an important metallurgical plant in the city of San Luis Potosi, Mexico. Whole samples were analyzed by atomic absorption (AA) for Pb, Cd, As, Cu, Ni, Fe and Cr. One hundred eighty of these samples were subjected to X-ray microanalysis (EDS) coupled with a scanning electron microscope to classify individual particles according to their chemical or mineralogical composition. The principal component analysis (PCA) obtained from the bulk sample analysis, and X-ray microanalysis from individual particles, confirmed chemical associations among elements directly and indirectly. PCA from bulk assays made the most effective use of X-ray microanalysis to characterize major particle types. Some chemical associations would be difficult to detect using microanalysis, alone, for example, in anthropogenic complex phases. In this work, the combined use of microanalysis and statistical methods permitted identification of associations among elements. We observed an association of Pb-As-Cd and Fe-Mn among the samples. In a second order, Pb-Fe, Pb-Mn, Fe-As, Fe-Cd, Cd-Mn and As-Mn showed a lower association. Only Ni and Cu appeared unassociated with any other element analyzed by AA. We characterized the mineral phases by size range, morphology and chemical composition using SEM-EDS to obtain a compositional approach of anthropogenic phases and peculiar morphology and size. A high percentage of heavy metal particles smaller than 2 μm were detected.

  2. Advancements in understanding the aeromagnetic expressions of basin-margin faults—An example from San Luis Basin, Colorado

    USGS Publications Warehouse

    Grauch, V. J.; Bedrosian, Paul A.; Drenth, Benjamin J.

    2013-01-01

    Herein, we summarize and expand on an investigation of the sources of aeromagnetic anomalies related to faults along the eastern margin of the San Luis Basin, northern Rio Grande Rift, Colorado (Grauch et al., 2010). Similar to the faults examined in the central Rio Grande Rift, magnetic sources can be completely explained by tectonic juxtaposition and produce multiple, vertically stacked magnetic contrasts at individual faults. However, the geologic sources are different. They arise from both the sedimentary cover and the underlying bedrock rather than from stratified sediments. In addition, geologic evidence for secondary growth or destruction of magnetic minerals at the fault zone is lacking.

  3. Seroprevalence of Trypanosoma cruzi among Teenek Amerindian residents of the Huasteca region in San Luis Potosi, Mexico.

    PubMed

    Juarez-Tobias, Soledad; Vaughan, Gilberto; Torres-Montoya, Aida; Escobar-Gutierrez, Alejandro

    2009-08-01

    Scarce information on the seroprevalence of Trypanosoma cruzi among Amerindians is available, and the distribution of this disease in Mexican Indian populations is unknown. In this study, the presence of specific antibodies against T. cruzi among Teenek Amerindians in nine different communities located in San Luis Potosi State was analyzed. An average seroprevalence of 6.5% was found in these populations, suggesting that active transmission of disease occurs in this relatively isolated population in Mexico, and therefore, further studies should be conducted to identify risk factor associated to Chagas disease in other isolated populations across the country to determine the prevalence of Chagas disease in Mexican Amerindians.

  4. Summary of the geology of the San Luis Basin, Colorado-New Mexico with emphasis on the geothermal potential for the Monte Vista Graben. Special Publication 17

    SciTech Connect

    Burroughs, R.L.

    1981-01-01

    The known geologic data of the San Luis Basin are reviewed and related to an understanding of the hydrogeothermal potential of the Alamosa-Monte Vista area. The physiographic setting of the region, the structural framework of the basin, and its influence on the stratigraphic makeup of the rock sequence, which in turn control the occurrence of potential deep water reservoirs, are reviewed. It is suggested that the San Luis Basin was well-developed by Miocene time, and that although the basin was modified by Neogene faulting, it is essentially a late Laramide event having been produced during the Paleogene. Attention is also given to high heat flow along the Rio Grande Rift and to the geothermal gradient of the San Luis Basin. The confined aquifer is then considered in respect to its hydrogeology, water quality, and as to the legal aspects of the system. (LEW)

  5. Late Miocene-Pleistocene evolution of a Rio Grande rift subbasin, Sunshine Valley-Costilla Plain, San Luis Basin, New Mexico and Colorado

    USGS Publications Warehouse

    Ruleman, C.A.; Thompson, R.A.; Shroba, R.R.; Anderson, M.; Drenth, B.J.; Rotzien, J.; Lyon, J.

    2013-01-01

    The Sunshine Valley–Costilla Plain, a structural subbasin of the greater San Luis Basin of the northern Rio Grande rift, is bounded to the north and south by the San Luis Hills and the Red River fault zone, respectively. Surficial mapping, neotectonic investigations, geochronology, and geophysics demonstrate that the structural, volcanic, and geomorphic evolution of the basin involves the intermingling of climatic cycles and spatially and temporally varying tectonic activity of the Rio Grande rift system. Tectonic activity has transferred between range-bounding and intrabasin faults creating relict landforms of higher tectonic-activity rates along the mountain-piedmont junction. Pliocene–Pleistocene average long-term slip rates along the southern Sangre de Cristo fault zone range between 0.1 and 0.2 mm/year with late Pleistocene slip rates approximately half (0.06 mm/year) of the longer Quaternary slip rate. During the late Pleistocene, climatic influences have been dominant over tectonic influences on mountain-front geomorphic processes. Geomorphic evidence suggests that this once-closed subbasin was integrated into the Rio Grande prior to the integration of the once-closed northern San Luis Basin, north of the San Luis Hills, Colorado; however, deep canyon incision, north of the Red River and south of the San Luis Hills, initiated relatively coeval to the integration of the northern San Luis Basin. Long-term projections of slip rates applied to a 1.6 km basin depth defined from geophysical modeling suggests that rifting initiated within this subbasin between 20 and 10 Ma. Geologic mapping and geophysical interpretations reveal a complex network of northwest-, northeast-, and north-south–trending faults. Northwest- and northeast-trending faults show dual polarity and are crosscut by north-south– trending faults. This structural model possibly provides an analog for how some intracontinental rift structures evolve through time.

  6. Contamination of heavy metals in birds from Embalse La Florida (San Luis, Argentina).

    PubMed

    Cid, Fabricio Damián; Gatica-Sosa, Claudia; Antón, Rosa Isabel; Caviedes-Vidal, Enrique

    2009-11-01

    Embalse La Florida is an artificial lake located in midwestern Argentina's San Luis province. It provides drinking water to approximately 70% of the province's human population and approximately 20% of the province is irrigated with water from the reservoir. The presence of heavy metals in Embalse La Florida's water has previously been reported. Nevertheless, no information about the levels of these contaminants in birds is available for this region. The aim of this study, therefore, is to (1) establish baseline data on lead (Pb) and cadmium (Cd) levels in birds from Embalse La Florida, (2) assess metal accumulation patterns between organs and bird species, and (3) evaluate the potential risk that these heavy metals pose for the local avifauna. We measured Pb and Cd in bone, pectoralis muscle, liver, gonad, and brain of three bird species representative of the Embalse La Florida ecosystem: Podiceps major (Great Grebe), Phalacrocorax brasilianus (Neotropic Cormorant), both of which are piscivorous, and Pitangus sulphuratus (Great Kiskadee), which is omnivorous. We also measured both heavy metals in Great Grebe eggs. Pb and Cd were detected in all of the tissues we assayed, and Pb concentrations were significantly higher than those for Cd in all tissues. The patterns of Pb and Cd accumulation differed between tissues, however. In general, gonads had the highest concentrations of Pb while Cd tended to accumulate in the liver. An interspecific analysis revealed that the omnivorous species had higher levels of both metals in bone, liver, and brain compared to both piscivorous species. There were no differences in Pb and Cd concentrations between males and females. The highest liver level of Pb (4.69 ppm wet weight) detected in Great Kiskadee, was comparable to those associated with toxic effects in birds, and Pb concentrations found in the liver of two females and two males (2.07 to 2.32 ppm wet weight) were also similar to those that could be physiologically

  7. InSAR deformation time series for an agricultural area in the San Luis Valley

    NASA Astrophysics Data System (ADS)

    Reeves, J. A.; Knight, R.; Zebker, H. A.; Schreüder, W. A.; Shanker, P.; Lauknes, T. R.

    2009-05-01

    The San Luis Valley (SLV) is an 8000 km2 region in southern Colorado that is home to a thriving agricultural economy. This valley is currently in a period of extreme drought, with county and state regulators struggling to develop appropriate management policies for both the surface water and the ground water. In 1998 the state of Colorado commissioned the Rio Grande Decision Support System to refine the hydogeologic characterization of the system, including the development of a MODFLOW finite difference model of groundwater flow. The main challenge in the SLV is acquiring sufficient data to characterize the spatially heterogeneous, time-varying behavior of the groundwater system. Here we apply the small baseline subset analysis (SBAS) interferometric radar (InSAR) technique to provide such data. InSAR techniques yield the deformation of Earth's surface at fine spatial resolution occurring between two satellite overflights, and SBAS permits solution for a time series of deformation maps. The measured deformation can be related to changes in the water table in underlying confined aquifers. The ability to map these changes, over time, in the SLV will provide critical information about the groundwater system. Historically, InSAR measurements have been difficult to make in agricultural areas. The change in cm-scale crop structure with time leads to signal decorrelation and the loss of useful information about surface deformation. The recently-developed SBAS method allows stable deformation estimates at certain ground points in an otherwise decorrelated time series of data. We applied this approach to data collected by the European Space Agency's ERS-1 and ERS-2 satellites over the western SLV from track 98 frame 2853 for the years 1992-2001. We used the Generic SAR (GSAR) SBAS software developed by Norut to produce time series deformation measurements for many positions across the entire SLV. We find that the 2000 km2 area captured in track 98 frame 2853 shows very high

  8. Initial vegetation species and senescience/stress indicator mapping in the San Luis Valley, Colorado using imaging spectrometer data

    NASA Technical Reports Server (NTRS)

    Clark, Roger N.; King, Trude V. V.; Ager, Cathy; Swayze, Gregg A.

    1995-01-01

    We analyzed AVIRIS data obtained over agricultural areas in the San Luis Valley of Colorado. The data were acquired on September 3, 1993. A combined method of radiative transfer modeling and ground calibration site reflectance was used to correct the flight data to surface reflectance. This method, called Radiative Transfer Ground Calibration, or RTGC, corrects for variable water vapor in the atmosphere and produces spectra free of artifacts with spectral channel to channel noise approaching the signal to noise of the raw data. The calibration site soil samples were obtained on the day of the overflight and measured on our laboratory spectrometer. The site was near the center of the AVIRIS scene and the spectra of the soil is spectrally bland, especially in the region of the chlorophyll absorption in the visible portion of the spectrum. The center of the scene is located at approximately 106 deg 03' longitude, 37 deg 23' latitude, and the scene covers about 92 square kilometers. This scene is one of 28 in the area for a general project to study the Summitville abandoned mine site, located in the mountains west of the San Luis Valley, and its effects on the surrounding environment.

  9. A New Destination for "The Flying Bus"?: The Implications of Orlando-Rican Migration for Luis Rafael Sanchez's "La guagua aerea"

    ERIC Educational Resources Information Center

    Barreneche, Gabriel Ignacio; Lombardi, Jane; Ramos-Flores, Hector

    2012-01-01

    Puerto Rican author Luis Rafael Sanchez's "La guagua aerea" explores the duality, hybridity, and fluidity of US-Puerto Rican identity through the frequent travel of migrants between New York City (the traditional destination city for Puerto Rican migrants) and the island. In recent years, however, the "flying bus" has adopted a new number one…

  10. On the Origin of the Crestone Crater: Low-Latitude Periglacial Features in San Luis Valley, Colorado

    NASA Astrophysics Data System (ADS)

    Schwans, E.; Meng, T. M.; Prudhomme, K.; Morgan, M. L.

    2015-12-01

    Located within the northern boundary of the Great Sand Dunes National Park is the Crestone Crater, a elliptical bowl-shaped feature consisting of a raised rim surrounding a central depression. The elongate crater has an approximate diameter of 100 m and reaches a depth of 10 m at its center relative to its rim, which rises 10 m above the elevation of the surrounding surface. Its precise origin is largely unknown and has perplexed regional geologists and residents of Crestone, Colorado for more than 80 years. This project used on-site and remote geophysical methods to characterize the processes that led to the geomorphologic surface expression observed today. Formation hypotheses examined encompass extraterrestrial, eolian, and periglacial processes. Field methods included a new gravity survey and reanalysis of gravity data collected in a previous student investigation of the feature. Additionally, a recent LiDAR dataset spanning San Luis Valley was examined to analyze the main structure, similar features in the area, and surrounding eolian and alluvial surfaces. An extraterrestrial origin, as suggested by numerous previous investigators, was deemed unlikely due to the non-unique gravity signature of the crater, its topographic similarity to many other like features identified in San Luis Valley, as well as its failure to excavate below the elevation of the surrounding surface. Furthermore, the expression of confirmed eolian landforms in San Luis Valley indicates that eolian processes alone would not produce such a prominent form in the level of vegetation observed. Proximal glacial deposits in the Sangre de Cristo Mountains show that the windblown sand in which all these features are clustered is adjacent to areas of past glaciations, and thus would have been affected by freeze-thaw cycles and thin, localized permafrost. Ice extent maps provided by the Colorado Geological Survey, as well as research on the timing of the formation of the Great Sand Dunes reinforce

  11. Forecasting Selenium Discharges to the San Francisco Bay-Delta Estuary: Ecological Effects of A Proposed San Luis Drain Extension

    USGS Publications Warehouse

    Presser, Theresa S.; Luoma, Samuel N.

    2006-01-01

    Selenium discharges to the San Francisco Bay-Delta Estuary (Bay-Delta) could change significantly if federal and state agencies (1) approve an extension of the San Luis Drain to convey agricultural drainage from the western San Joaquin Valley to the North Bay (Suisun Bay, Carquinez Strait, and San Pablo Bay); (2) allow changes in flow patterns of the lower San Joaquin River and Bay-Delta while using an existing portion of the San Luis Drain to convey agricultural drainage to a tributary of the San Joaquin River; or (3) revise selenium criteria for the protection of aquatic life or issue criteria for the protection of wildlife. Understanding the biotransfer of selenium is essential to evaluating effects of selenium on Bay-Delta ecosystems. Confusion about selenium threats to fish and wildlife stem from (1) monitoring programs that do not address specific protocols necessary for an element that bioaccumulates; and (2) failure to consider the full complexity of the processes that result in selenium toxicity. Past studies show that predators are more at risk from selenium contamination than their prey, making it difficult to use traditional methods to predict risk from environmental concentrations alone. This report presents an approach to conceptualize and model the fate and effects of selenium under various load scenarios from the San Joaquin Valley. For each potential load, progressive forecasts show resulting (1) water-column concentration; (2) speciation; (3) transformation to particulate form; (4) particulate concentration; (5) bioaccumulation by invertebrates; (6) trophic transfer to predators; and (7) effects on those predators. Enough is known to establish a first-order understanding of relevant conditions, biological response, and ecological risks should selenium be discharged directly into the North Bay through a conveyance such as a proposed extension of the San Luis Drain. The approach presented here, the Bay-Delta selenium model, determines the mass, fate

  12. Spring stopover food resources and land use patterns of Rocky Mountain population Sandhill Carnes in the San Luis Valley, Colorado

    USGS Publications Warehouse

    Laubhan, M.K.; Gammonley, J.H.; Dolton, D.D.

    2001-01-01

    Virtually the entire Rocky Mountain population (RMP) of greater sandhill cranes uses the San Luis Valley (SLV) of Colorado as a spring stopover area. RMP cranes in the SLV depend on unharvested grain provided on Monte Vista National Wildlife Refuge, and on waste grain in privately owned fields. In recent years, however, fall tillage and irrigation of grain fields has become increasingly widespread in the SLV. These changes in farming practices have resulted in an unmeasured reduction in waste grain availability for RMP cranes during spring and have prompted concern over whether current or projected foods are adequate to meet spring demands of the target population size of 18,000-20,000 RMP cranesa?|

  13. Real-Time Water Quality Monitoring and Habitat Assessment in theSan Luis National Wildlife Refuge

    SciTech Connect

    Quinn, Nigel W.T.; Hanlon, Jeremy S.; Burns, Josephine R.; Stromayer, Karl A.K.; Jordan, Brandon M.; Ennis, Mike J.; Woolington,Dennis W.

    2005-08-28

    The project report describes a two year experiment to control wetland drainage to the San Joaquin River of California from the San Luis National Wildlife Refuge using a decision support system for real-time water quality management. This system required the installation and operation of one inlet and three drainage flow and water quality monitoring stations which allowed a simple mass balance model to be developed of the seasonally managed wetlands in the study area. Remote sensing methods were developed to document long-term trends in wetland moist soil vegetation and soil salinity in response to management options such as delaying the initiation of seasonal wetland drainage. These environmental management tools provide wetland managers with some of the tools necessary to improve salinity conditions in the San Joaquin River and improve compliance with State mandated salinity objectives without inflicting long-term harm on the wild fowl habitat resource.

  14. [Luis Hidalgo y Carpio, Editor of Gaceta Médica de México (1818-1879)].

    PubMed

    Rodríguez-Pérez, Martha Eugenia

    2009-01-01

    Luis Hidalgo y Carpio (1818-1879) was a notable physician who made important contributions to the field of medicine during his time. Nevertheless, reference sources on the aspect from Hidalgo y Carpio that we would like to emphasize (i.e. as an editor of a medical journal) are scarce since precisely when Hidalgo y Carpio was named President of the Medical Society (later the Academia Nacional de Medicina), in 1987, the publication of the Gaceta Médica de México was temporarily interrupted. Hidalgo y Carpio played a key role as an editor at a time when the medical community of Mexico required a means whereby the scientific achievements could be published and discussed among peers and colleagues. Under Hidalgo y Carpio, the Gaceta Médica de México soon reached a wide audience, not only as a periodical publication but also for the prestige of the Academy that represented.

  15. Prevalence of pathogenic Acanthamoeba (Protozoa:Amoebidae) in the atmosphere of the city of San Luis Potosi, Mexico.

    PubMed

    Rodriguez-Zaragoza, S; Magana-Becerra, A

    1997-01-01

    Several species of pathogenic Acanthamoeba cause infections to humans, but amoebic keratitis is more frequently found than any other due to the increasing number of contact lens wearers in the world. Cysts and trophozoites of these amebas are airborne and may pollute water from the air. We investigated the proportion of pathogenic Acanthamoeba from the atmosphere of the city of San Luis Potosi. Samples were taken by the impinger method, every month during one year. We isolated 23 strains of Acanthamoeba, 61% of them were non-pathogenic, 31% were non-pathogenic with invasive capacity and 8% were pathogenic to mice. Almost 40% of these strains represent danger of infections to humans. The isolations were more abundant during the dry season in the south (urban) and west (suburban) stations, which means that the sanitary conditions around stands may enhance the proportion of pathogenic strains in the surroundings.

  16. Residential and commercial space heating and cooling with possible greenhouse operation: Baca Grande development, San Luis Valley, Colorado

    NASA Astrophysics Data System (ADS)

    Goering, S. W.; Garing, K. L.; Coury, G. E.; Fritzler, E. A.

    1980-05-01

    A feasibility study was performed to evaluate the potential of multipurpose applications of moderate temperature geothermal waters in the vicinity of the Baca Grande community development in the San Luis Valley, Colorado. Engineering designs were developed for geothermal district heating systems for space heating and domestic hot water heating for residences, including a mobile home park, an existing motel, a greenhouse complex, and other small commercial uses such as aquaculture. In addition, a thorough institutional analysis of the study area was performed to highlight factors which might pose barriers to the ultimate commercial development of the resource. Finally, an environmental evaluation of the possible impacts of the proposed action was also performed. The institutional and environmental analyses indicate that no significant barriers to development are apparent.

  17. Archosauriform remains from the Late Triassic of San Luis province, Argentina, Quebrada del Barro Formation, Marayes-El Carrizal Basin

    NASA Astrophysics Data System (ADS)

    Gianechini, Federico A.; Codorniú, Laura; Arcucci, Andrea B.; Castillo Elías, Gabriela; Rivarola, David

    2016-03-01

    Here we present archosauriform remains from 'Abra de los Colorados', a fossiliferous locality at Sierra de Guayaguas, NW San Luis Province. Two fossiliferous levels were identified in outcrops of the Quebrada del Barro Formation (Norian), which represent the southernmost outcrops of the Marayes-El Carrizal Basin. These levels are composed by massive muddy lithofacies, interpreted as floodplain deposits. The specimens consist of one incomplete maxilla (MIC-V718), one caudal vertebra (MIC-V719), one metatarsal (MIC-V720) and one indeterminate appendicular bone (MIC-V721). The materials can be assigned to Archosauriformes but the fragmentary nature and lack of unambiguous synapomorphies preclude a more precise taxomic assignment. The maxilla is remarkably large and robust and represents the posterior process. It preserved one partially erupted tooth with ziphodont morphology. This bone shows some anatomical traits and size match with 'rauisuchians' and theropods. MIC-V719 corresponds to a proximal caudal vertebra. It has a high centrum, a ventral longitudinal furrow, expanded articular processes for the chevrons, a posteriorly displaced diapophysis located below the level of the prezygapophyses, and short prezygapophyses. This vertebra would be from an indeterminate archosauriform. MIC-V720 presents a cylindrical diaphysis, with a well-developed distal trochlea, which present resemblances with metatarsals of theropods, pseudosuchians, and silesaurids, although the size matches better with theropods. MIC-V721 has a slender diaphysis and a convex triangular articular surface, and corresponds to an indeterminate archosauriform. Despite being fragmentary, these materials indicate the presence of a diverse archosauriforms association from Late Triassic beds of San Luis. Thus, they add to the faunal assemblage recently reported from this basin at San Juan Province, which is much rich and diverse than the coeval paleofauna well known from Los Colorados Formation in the

  18. [A seroepidemiological survey on the island of São Luis during a dengue epidemic in Maranhão].

    PubMed

    Vasconcelos, P F; Lima, J W; Raposo, M L; Rodrigues, S G; da Rosa, J F; Amorim, S M; da Rosa, E S; Moura, C M; Fonseca, N; da Rosa, A P

    1999-01-01

    The island of São Luis in the State of Maranhão, constituted by the municipalities of São Luis-SL (835,428 inhabitants), São José de Ribamar-SJR (60,633 inhabitants) and Paço do Lumiar-PL (80,274 inhabitants), has been suffering dengue (DEN) fever epidemics since 1995, caused by DEN-1. In 1996, from August through October, an aleatory sero-epidemiologic survey was carried out in order to estimate the incidence of DEN infection and to analyze other clinical and epidemiological parameters. A questionnaire was applied and serum samples were simultaneously obtained. Serum samples were tested by hemagglutination inhibition (HI). Results were analyzed using Lotus 123, Epi-info 6.0, Excel 5.0 and STATA softwares. A total of 1,217 serum samples were obtained (101 of PL, 100 of SJR and 1017 of SL). The rate of DEN was 55.4% in PL, 28% in SJR and 41.4% in SL, suggesting the occurrence of 401,933 infections. No difference was seen between males and females, but infection occurred more in the upper social class than in poor people (p < 0.003), and was more frequent in adults than in children (p < 0.0004). In SL, the incidence was stratified into seven sanitary districts (SD), and prevalence was found to range from 26.1% in SD4 to 56.8% in SD1 (p < 0.0001). Symptoms were more frequently reported by people whose HI was positive: they included fever, headache, chills, dizziness, retrobulbar pains, muscle and joint pains, nausea, anorexia and skin rash. In spite of the high incidence of infection, no hemorrhagic cases were reported.

  19. Digital data from the Questa-San Luis and Santa Fe East helicopter magnetic surveys in Santa Fe and Taos Counties, New Mexico, and Costilla County, Colorado

    USGS Publications Warehouse

    Bankey, Viki; Grauch, V.J.S.; Drenth, B.J.; ,

    2006-01-01

    This report contains digital data, image files, and text files describing data formats and survey procedures for aeromagnetic data collected during high-resolution aeromagnetic surveys in southern Colorado and northern New Mexico in December, 2005. One survey covers the eastern edge of the San Luis basin, including the towns of Questa, New Mexico and San Luis, Colorado. A second survey covers the mountain front east of Santa Fe, New Mexico, including the town of Chimayo and portions of the Pueblos of Tesuque and Nambe. Several derivative products from these data are also presented as grids and images, including reduced-to-pole data and data continued to a reference surface. Images are presented in various formats and are intended to be used as input to geographic information systems, standard graphics software, or map plotting packages.

  20. {open_quotes}Black Gold{close_quotes} leads to new structural interpretation, Northern Sangre de Cristo Mountains/Northeast San Luis Basin

    SciTech Connect

    Watkins, T.A.; Belcher, J.S.; Gries, R.

    1995-06-01

    In the course of exploring for gold along the east margin of the Rio Grande Rift (northern Sangre de Cristo Mountains and northeastern San Luis Basin) live Cretaceous oil was discovered in fractured Precambrian gneiss in 25 of 42 shallow drill holes. Geologic mapping located two outcrops of Mesozoic sediments along the west flank of the Sangre de Cristo Mountains. Mancos Shale, Dakota Group and Morrison Formation sediments were identified from 17 drill holes. These are the first known occurrences of Mesozoic sediments in the area. Previous investigations had concluded that the Mesozoic section eroded from the San Luis uplift during the Laramide. Surface and subsurface geologic data was integrated with gravity, magnetic and seismic surveys for a new structural interpretation. The San Luis Basin is separated from the mountains by an intermediate block and the main basin-bounding fault is three miles west-southwest of the mountain front. A major low-angle, normal fault or detachment fault is related to Miocene rifting. A thick section of Mesozoic sediments are interpreted to be present in the hanging wall of this low angle fault. Buried and thermally matured in a Laramide intermountane basin, these sediments are likely the source of the present day oil found in Precambrian rocks.

  1. Potential human health risk by 234,238U and 210Po due to consumption of fish from the "Luis L. Leon" reservoir (Northern Mexico)

    NASA Astrophysics Data System (ADS)

    Luna-Porres, M. Y.; Rodríguez-Villa, M. A.; Herrera-Peraza, E.; Cabral-Lares, M.; Renteria-Villalobos, M.; Montero-Cabrera, M. E.

    2014-07-01

    The Conchos River is one of the most important in northern Mexico and the main surface waterway in the arid state of Chihuahua. The Luis L. Leon dam produces the Luis L. Leon Reservoir, which is the last major reservoir before the Conchos River enters the Rio Grande at the Texas-Chihuahua border. Activity concentrations (AC) of 234,238U and 210Po in fillet and liver of three stocked fish species (Lepomis cyanellus, Cyprinus carpio and Ictalurus furcatus), as well as in water from the Luis L. Leon reservoir were determined. 238U and 234U ACs in fillet samples showed values of 0.007-0.014 and 0.01-0.02 Bq kg-1 wet weight (ww), respectively. Liver samples for Lepomis cyanellus, Cyprinus carpio and Ictalurus furcatus species, present 210Po AC of 1.16-3.26 0.70-1.13 and 0.93-1.37 Bqṡkg-1 ww. The elemental Bioaccumulation Factor (BAF) for fish tissues respect to their concentrations in water was determined. Lepomis cyanellus species showed the highest BAF for total uranium in fillet, with value 1.5. The annual effective dose for uranium in adults by fish consumption in this work ranged from 4.46×10-3 to 3.68×10-2 μSvṡyear-1. The difference in concentrations of uranium in fillet among the studied species is likely primarily due to their differences in diet and habitat.

  2. Confined aquifer head measurements and storage properties in the San Luis Valley, Colorado, from spaceborne InSAR observations

    NASA Astrophysics Data System (ADS)

    Chen, Jingyi; Knight, Rosemary; Zebker, Howard A.; Schreüder, Willem A.

    2016-05-01

    Interferometric Synthetic Aperture Radar (InSAR), a remote sensing technique for measuring centimeter-level surface deformation, is used to estimate hydraulic head in the confined aquifer of the San Luis Valley (SLV), Colorado. Reconstructing head measurements from InSAR in agricultural regions can be difficult, as InSAR phase data are often decorrelated due to vegetation growth. Analysis of 17 L-band ALOS PALSAR scenes, acquired between January 2007 and March 2011, demonstrates that comprehensive InSAR deformation measurements can be recovered over the vegetated groundwater basin with an improved processing strategy. Local skeletal storage coefficients and time delays between the head change and deformation are estimated through a joint InSAR-well data analysis. InSAR subsidence estimates are transformed to head changes with finer temporal and spatial resolution than is possible using existing well records alone. Both InSAR and well data suggest that little long-term water-storage loss occurred in the SLV over the study period and that inelastic compaction was negligible. The seasonal head variations derived from InSAR are consistent with the existing well data at most locations where confined aquifer pumping activity dominates. Our results demonstrate the advantages of InSAR measurements for basin-wide characterization of aquifer storage properties and groundwater levels over agricultural regions.

  3. Detection of residual organochlorine and organophosphorus pesticides in agricultural soil in Rio Verde region of San Luis Potosi, Mexico.

    PubMed

    Velasco, Antonio; Hernández, Sergio; Ramírez, Martha; Ortíz, Irmene

    2014-01-01

    Organochlorine pesticides were intensively used in Mexico from 1950 until their ban and restriction in 1991. However, the presence of these compounds is commonly reported in many regions of the country. The aim of the present study was to identify and quantify residual organochlorine and organophosphorus pesticides in agricultural soil in Rio Verde region, San Luis Potosi state, which has been identified as possibly polluted by pesticides. Composed samples from 24 zones covering an area of approximately 5,440 ha were analyzed. The most frequently found pesticides were p,p'-DDT followed by ,p,p'-DDE, heptachlor, endosulfan and γ-HCH whose frequency rates were 100, 91, 83 and 54%, respectively. The concentration of p,p'-DDT in the crops grown in these soils was in the following order: chili > maize > tomato > alfalfa. The results obtained in this study show that p,p'-DDT values are lower or similar to those found in other agricultural regions of Mexico. Methyl and ethyl parathion were the most frequent organophosphate pesticide detected in 100% and 62.5% of the samples with average concentrations of 25.20 and 47.48 μg kg(-1), respectively. More research is needed to establish the background levels of pesticides in agricultural soils and their potential ecological and human health effects in this region. PMID:24813984

  4. Residential and commercial space heating and cooling with possible greenhouse operation; Baca Grande development, San Luis Valley, Colorado. Final report

    SciTech Connect

    Goering, S.W.; Garing, K.L.; Coury, G.E.; Fritzler, E.A.

    1980-05-01

    A feasibility study was performed to evaluate the potential of multipurpose applications of moderate-temperature geothermal waters in the vicinity of the Baca Grande community development in the San Luis Valley, Colorado. The project resource assessment, based on a thorough review of existing data, indicates that a substantial resource likely exists in the Baca Grande region capable of supporting residential and light industrial activity. Engineering designs were developed for geothermal district heating systems for space heating and domestic hot water heating for residences, including a mobile home park, an existing motel, a greenhouse complex, and other small commercial uses such as aquaculture. In addition, a thorough institutional analysis of the study area was performed to highlight factors which might pose barriers to the ultimate commercial development of the resource. Finally, an environmental evaluation of the possible impacts of the proposed action was also performed. The feasibility evaluation indicates the economics of the residential areas are dependent on the continued rate of housing construction. If essentially complete development could occur over a 30-year period, the economics are favorable as compared to existing alternatives. For the commercial area, the economics are good as compared to existing conventional energy sources. This is especially true as related to proposed greenhouse operations. The institutional and environmental analyses indicates that no significant barriers to development are apparent.

  5. Luminescence dating of anthropogenic features of the San Luis Valley, Colorado: from stone huts to stone walls

    USGS Publications Warehouse

    Mahan, Shannon; Donlan, Rebecca A.; Kardos, Barbara Maat

    2015-01-01

    The Snake Nest Wall site and the Crestone Stone Huts are in the northern San Luis Valley, Colorado, and provide a unique opportunity to date high-altitude archeological sites of unknown age and origin using optically stimulated luminescence (OSL). We sampled sediment underlying foundation stones of these structures to establish a chronological framework for each site's construction. OSL dating of the quartz grains directly under the Snake Nest Wall suggest that the stones and, therefore, the structure was most recently emplaced between 1855 and 1890 A.D. Dating of the sediment beneath the Crestone Stone Huts suggests the construction time of these huts is between 1860 and 1890 A.D. Analysis of the equivalent dose (DE) dispersion of the OSL samples at Snake Nest Wall and the Crestone Huts shows that the majority of sediments were fully bleached prior to deposition and the low scatter suggests that short-term or shallow alluvial processes were the dominant transport for sediments. In both cases, the OSL ages show that the construction was during very recent historical times, although it is likely that the Snake Nest Wall was rebuilt in the late 19th century. Further study is warranted at the Snake Nest Wall since it shows signs of greater antiquity and a continued presence of human use. The Crestone Huts are shown to be a product of railroad building during the boomtown days of Lucky and Crestone.

  6. Polybrominated diphenyl ethers (PBDEs) concentration in soil from San Luis Potosi, Mexico: levels and ecological and human health risk characterization.

    PubMed

    Pérez-Vázquez, Francisco J; Orta-García, Sandra T; Ochoa-Martínez, Ángeles C; Pruneda-Álvarez, Lucia G; Ruiz-Vera, Tania; Jiménez-Avalos, Jorge Armando; González-Palomo, Ana K; Pérez-Maldonado, Iván N

    2016-01-01

    The aim of this study was to assess the levels of polybrominated diphenyl ethers (PBDEs) in soils from the city of San Luis Potosi in Mexico and perform an ecological and human health risk characterization. In order to confirm the presence of PBDEs, outdoor surface soil samples were collected and the concentrations of PBDEs in urban, industrial, agricultural, and brick kiln industry areas were determined. The mean total PBDEs levels obtained in the study sites were 25.0 ± 39.5 μg/kg (geometric mean ± standard deviation) in the brick kiln industry zone; 34.5 ± 36.0 μg/kg in the urban zone; 8.00 ± 7.10 μg/kg in the industrial zone and 16.6 ± 15.3 μg/kg in the agricultural zone. The ecological and human health risk characterization showed relatively low-hazard quotient values. However, the moderately high PBDEs levels found in soils highlight the necessity to establish a systematic monitoring process for PBDEs in environmental and biological samples. PMID:26566197

  7. Community Response to Concentrating Solar Power in the San Luis Valley: October 9, 2008 - March 31, 2010

    SciTech Connect

    Farhar, B. C.; Hunter, L. M.; Kirkland, T. M.; Tierney, K. J.

    2010-06-01

    This report is about the social acceptance of utility-scale concentrating solar power (CSP) plants in the San Luis Valley, approximately 200 miles southwest of Denver, Colorado. The research focused on social factors that may facilitate and impede the adoption and implementation of CSP. During the winter of 2008-2009, interviews were conducted with a purposive sample of 25 CSP-related stakeholders inside and outside the Valley. Interviews focused on the perceived advantages and disadvantages of siting a hypothetical 100-MW CSP facility in the Valley, the level of community support and opposition to CSP development, and related issues, such as transmission. State policy recommendations based on the findings include developing education programs for Valley residents, integrating Valley decision makers into an energy-water-land group, providing training for Valley decision makers, offering workforce training, evaluating models of taxation, and forming landholder energy associations. In addition, the SLV could become a laboratory for new approaches to CSP facility and transmission siting decision-making. The author recommends that outside stakeholders address community concerns and engage Valley residents in CSP decisions. Engaging the residents in CSP and transmission decisions, the author says, should take parallel significance with the investment in solar technology.

  8. Use of multiple indicators to assess the environmental quality of urbanized aquatic surroundings in San Luis, Argentina.

    PubMed

    Calderon, Mirian R; González, Patricia; Moglia, Marta; Gonzáles, Soledad Oliva; Jofré, Mariana

    2014-07-01

    Urbanization can cause significant changes in the integrity of fluvial ecosystems, which makes it necessary to assess environmental conditions of areas where population growth rates are high. A study of the environmental quality of Chorrillos River (San Luis-Argentina) and its tributaries was carried out in order to evaluate the potential effect of an urbanization gradient. Six sites were sampled along the main course and tributaries of the river. Urbanization variables were measured and included to calculate an Urbanization Index. Physical–chemical analyses were performed in water samples to evaluate water quality through the use of a simplified index of water quality (SIWQ). Plants, macroinvertebrates, and amphibians metrics were used to assess the biological state of the studied sites. The Urbanization Index varied significantly between sites and was significantly correlated to the SIWQ. However, no significant correlations were found between SIWQ and macroinvertebrates and amphibians variables. Water quality of Chorrillos River and its tributaries is good, but it is affected by anthropic influences as reflected by the declining of SIWQ values. Although biological sampling constitutes an important tool in the assessment of water quality of rivers, in this report biological results were not conclusive. PMID:24659439

  9. Evaluation of the transfer of soil arsenic to maize crops in suburban areas of San Luis Potosi, Mexico.

    PubMed

    Rosas-Castor, J M; Guzmán-Mar, J L; Alfaro-Barbosa, J M; Hernández-Ramírez, A; Pérez-Maldonado, I N; Caballero-Quintero, A; Hinojosa-Reyes, L

    2014-11-01

    The presence of arsenic (As) in agricultural food products is a matter of concern because it can cause adverse health effects at low concentrations. Agricultural-product intake constitutes a principal source for As exposure in humans. In this study, the contribution of the chemical-soil parameters in As accumulation and translocation in the maize crop from a mining area of San Luis Potosi was evaluated. The total arsenic concentration and arsenic speciation were determined by HG-AFS and IC-HG-AFS, respectively. The data analysis was conducted by cluster analysis (CA) and principal component analysis (PCA). The soil pH presented a negative correlation with the accumulated As in each maize plant part, and parameters such as iron (Fe) and manganese (Mn) presented a higher correlation with the As translocation in maize. Thus, the metabolic stress in maize may induce organic acid exudation leading a higher As bioavailability. A high As inorganic/organic ratio in edible maize plant tissues suggests a substantial risk of poisoning by this metalloid. Careful attention to the chemical changes in the rhizosphere of the agricultural zones that can affect As transfer through the food chain could reduce the As-intoxication risk of maize consumers. PMID:25128885

  10. Sediment discharge in the Upper Arroyo Grande and Santa Rita Creek basins, San Luis Obispo County, California

    USGS Publications Warehouse

    Knott, J.M.

    1976-01-01

    Sediment data collected in the upper Arroyo Grande and Santa Rita Creek basins, San Luis Obispo County, California, during the 1968-73 water years were analyzed to determine total sediment discharge at four stations in the basins. Water discharge and total sediment discharge at these stations, representative of the 1943-72 period, were estimated from long-term flow data for nearby gaging stations and water-sediment discharge relations determined for the 1968-73 water years. Most of the total annual sediment discharge at each station occurs during a few days each year. The quantity of sediment transported in a single day often accounts for more than 40 percent of the total annual sediment discharge. Estimated sediment discharge for the upper Arroyo Grande and Santa Rita Creek basins during the 1943-72 water years averaged 53,000 tons and 23,000 tons per year. Long-term sediment deposition in Lopez Reservoir, which is in the southern part of the upper Arroyo Grande basin, was estimated to be 35 acre-feet per year. (Woodard-USGS)

  11. Detection of residual organochlorine and organophosphorus pesticides in agricultural soil in Rio Verde region of San Luis Potosi, Mexico.

    PubMed

    Velasco, Antonio; Hernández, Sergio; Ramírez, Martha; Ortíz, Irmene

    2014-01-01

    Organochlorine pesticides were intensively used in Mexico from 1950 until their ban and restriction in 1991. However, the presence of these compounds is commonly reported in many regions of the country. The aim of the present study was to identify and quantify residual organochlorine and organophosphorus pesticides in agricultural soil in Rio Verde region, San Luis Potosi state, which has been identified as possibly polluted by pesticides. Composed samples from 24 zones covering an area of approximately 5,440 ha were analyzed. The most frequently found pesticides were p,p'-DDT followed by ,p,p'-DDE, heptachlor, endosulfan and γ-HCH whose frequency rates were 100, 91, 83 and 54%, respectively. The concentration of p,p'-DDT in the crops grown in these soils was in the following order: chili > maize > tomato > alfalfa. The results obtained in this study show that p,p'-DDT values are lower or similar to those found in other agricultural regions of Mexico. Methyl and ethyl parathion were the most frequent organophosphate pesticide detected in 100% and 62.5% of the samples with average concentrations of 25.20 and 47.48 μg kg(-1), respectively. More research is needed to establish the background levels of pesticides in agricultural soils and their potential ecological and human health effects in this region.

  12. Prevalence of antibodies to the repeat epitope of the circumsporozoite protein of Plasmodium vivax in San Luis Potosi, Mexico.

    PubMed

    Mota, J; Coreño, O; Cochrane, A H; Ramos, C

    1996-01-01

    The prevalence of antibodies against the repeat epitope of the circumsporozoite protein (cs) of the standard (PV210) and variant (PVK247) strain of Plasmodium vivax was determined by ELISA in 1170 sera from individual residents of seven localities of the Region Huasteca of San Luis Potosi, Mexico. The capture antigens were the synthetic peptides DDAAD and (ANGAGNQPG) that correspond to the repeats of the PV210 and PVK247 cs proteins, respectively. Of the analyzed serum samples, 34.1% (400/1170) were positive with one or both of these antigens. Of the sera, 18.2% (214/1170) reacted with the DDAAD peptide and 6.6% (78/1170) were positive with the variant synthetic peptide. Additionally, 9.2% (108/1170) of the samples reacted with both peptides. A sample of 10% of positive sera for the variant cs repeat (18/78) was tested with the cs repeat peptide of P. malariae/P. brasilianum (NAAG); almost all of them (16/18, 89%) being positive. These results confirm that the transmission of the variant strain of P. vivax is a common phenomenon in endemic regions in Latin America, as well as in other tropical regions of the world. These findings may have implications for the development of aP. vivax vaccine since that based on the standard cs repeat only would not be universally protective.

  13. 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.

  14. Scanning and transmission electron microscope of suspended lead-rich particles in the air of San Luis Potosi, Mexico

    NASA Astrophysics Data System (ADS)

    Piña, A. Aragón; Villaseñor, G. Torres; Jacinto, P. Santiago; Fernández, M. Monroy

    In the city of San Luis Potosi exists an important metallurgical plant and is known that in the adjacent urban zone, there is a high concentration of lead in the air, it is also supposed that most of the particles with lead have an anthropogenic origin because these particles show morphological characteristics and chemical composition very different in comparison with common lead minerals. In this work it was proved that most of the airborne particles with lead present in this urban zone, effectively came from the copper smelter. The airborne particles with lead were compared with particles with lead obtained starting from samples of slag and lead calcine of the copper smelter. To perform the comparative study, these particles were studied with energy dispersive X-ray microanalysis (EDS) in conjunction with scanning electron microscope to obtain chemical composition and associated morphological characteristics. Results suggest that these particles, composed of only one phase, are chemically distinct from any crustal lead mineral. Because of the complexity of the chemical composition of these particles (Pb, S, Cu, As, Fe, Zn, Cd, Sb, O), some of the airborne particles were analyzed by transmission microscopy in order to associate crystalline structure with any particular chemical phase.

  15. Polybrominated diphenyl ethers (PBDEs) concentration in soil from San Luis Potosi, Mexico: levels and ecological and human health risk characterization.

    PubMed

    Pérez-Vázquez, Francisco J; Orta-García, Sandra T; Ochoa-Martínez, Ángeles C; Pruneda-Álvarez, Lucia G; Ruiz-Vera, Tania; Jiménez-Avalos, Jorge Armando; González-Palomo, Ana K; Pérez-Maldonado, Iván N

    2016-01-01

    The aim of this study was to assess the levels of polybrominated diphenyl ethers (PBDEs) in soils from the city of San Luis Potosi in Mexico and perform an ecological and human health risk characterization. In order to confirm the presence of PBDEs, outdoor surface soil samples were collected and the concentrations of PBDEs in urban, industrial, agricultural, and brick kiln industry areas were determined. The mean total PBDEs levels obtained in the study sites were 25.0 ± 39.5 μg/kg (geometric mean ± standard deviation) in the brick kiln industry zone; 34.5 ± 36.0 μg/kg in the urban zone; 8.00 ± 7.10 μg/kg in the industrial zone and 16.6 ± 15.3 μg/kg in the agricultural zone. The ecological and human health risk characterization showed relatively low-hazard quotient values. However, the moderately high PBDEs levels found in soils highlight the necessity to establish a systematic monitoring process for PBDEs in environmental and biological samples.

  16. Evaluation of the transfer of soil arsenic to maize crops in suburban areas of San Luis Potosi, Mexico.

    PubMed

    Rosas-Castor, J M; Guzmán-Mar, J L; Alfaro-Barbosa, J M; Hernández-Ramírez, A; Pérez-Maldonado, I N; Caballero-Quintero, A; Hinojosa-Reyes, L

    2014-11-01

    The presence of arsenic (As) in agricultural food products is a matter of concern because it can cause adverse health effects at low concentrations. Agricultural-product intake constitutes a principal source for As exposure in humans. In this study, the contribution of the chemical-soil parameters in As accumulation and translocation in the maize crop from a mining area of San Luis Potosi was evaluated. The total arsenic concentration and arsenic speciation were determined by HG-AFS and IC-HG-AFS, respectively. The data analysis was conducted by cluster analysis (CA) and principal component analysis (PCA). The soil pH presented a negative correlation with the accumulated As in each maize plant part, and parameters such as iron (Fe) and manganese (Mn) presented a higher correlation with the As translocation in maize. Thus, the metabolic stress in maize may induce organic acid exudation leading a higher As bioavailability. A high As inorganic/organic ratio in edible maize plant tissues suggests a substantial risk of poisoning by this metalloid. Careful attention to the chemical changes in the rhizosphere of the agricultural zones that can affect As transfer through the food chain could reduce the As-intoxication risk of maize consumers.

  17. Direct, immunological and molecular techniques for a fasciolosis survey in a rural area of San Luis, Argentina.

    PubMed

    Carnevale, Silvana; Cabrera, Marta Graciela; Cucher, Marcela Alejandra; di Risio, Cecilia Alicia; Malandrini, Jorge Bruno; Kamenetzky, Laura; Alazraqui, Marcio; Etchart, Cristina Beatriz; Pantano, María Laura; Velásquez, Jorge Néstor

    2013-10-01

    Fasciolosis is a zoonosis caused by the trematode Fasciola hepatica, prevalent in cattle, that is actually emerging as a cause of disease in humans. The goal of this work was to describe the characteristics of fasciolosis in arroyo El Juncal region, La Toma, San Luis province, Argentina. In order to get this objective, a transversal, quantitative study was carried out by a fieldwork that allowed the collection of data, human, animal, and environmental samples. The materials were processed by direct, immunological and/or molecular diagnostic techniques. According to the geographical characteristics and in presence of all the definitive and intermediate hosts, reservoirs, and sources of infection, it was possible to describe the persistence of fasciolosis in the area. The prevalence was 11.90 % in humans (by serology), 5.26 % in cattle (by coprological analysis) and 61.76 % in snails (by PCR). The situation that was found for this area indicates that any measure of intervention for the control of this zoonosis should be adopted by multidisciplinary teams. PMID:24431579

  18. Diet and habitat landscape of Equus sp. and Mammuthus columbi for the Late Pleistocene deposit at El Cedral, San Luis Potosi, Mexico

    NASA Astrophysics Data System (ADS)

    Perez-Crespo, V. A.; Bennami, M.; Sanchez-Chillon, B.; Alberdi, M. T.; Santos-Moreno, A.

    2007-05-01

    The diet and habitat landscape for fossil specimens pertaining to Late Pleistocene horse Equus sp., and mammoth Mammuthus columbi from the deposit at Rancho La Amapola, El Cedral, San Luís Potosí, México were assayed with basis on stable isotopes analysis the carbon and oxygen found in dental enamel apatite. For horses the Δ 13C values showed from C3/C4 a basic C4-plants diet ranging into a C3/C4 mixer feeder, while mammoth showed values as a C3/C4 mixer feeder, but preferring C4 plants; there was not significant differences among the average values for both groups, with -3.5 ‰ for horses and -3.8 ‰ for mammoth. Mexican data was compared with those for the same genera from US localities, including the states of Florida, New Mexico, and Texas, allowing confirmation of the inference that El Cedral species were mainly grazers, but with some C3 plants being consumed; furthermore, comparisons of El Cedral specimens, using both carbon and oxygen isotopes, with Floridan C3-plant sites showed El Cedral specimens could be defined as mixer feeders in open habitats, preferring such opn areas like grassland or savanna. Our results are in agreement with the species dental morphology, as well as with the pollen record for the same site, which showed the existence of grassland that could have extended during the Late Pleistocene from southern Canada to central Mé xico

  19. Climate, streamflow, and legacy effects on growth of riparian Populus angustifolia in the arid San Luis Valley, Colorado

    USGS Publications Warehouse

    Andersen, Douglas

    2016-01-01

    Knowledge of the factors affecting the vigor of desert riparian trees is important for their conservation and management. I used multiple regression to assess effects of streamflow and climate (12–14 years of data) or climate alone (up to 60 years of data) on radial growth of clonal narrowleaf cottonwood (Populus angustifolia), a foundation species in the arid, Closed Basin portion of the San Luis Valley, Colorado. I collected increment cores from trees (14–90 cm DBH) at four sites along each of Sand and Deadman creeks (total N = 85), including both perennial and ephemeral reaches. Analyses on trees <110 m from the stream channel explained 33–64% of the variation in standardized growth index (SGI) over the period having discharge measurements. Only 3 of 7 models included a streamflow variable; inclusion of prior-year conditions was common. Models for trees farther from the channel or over a deep water table explained 23–71% of SGI variability, and 4 of 5 contained a streamflow variable. Analyses using solely climate variables over longer time periods explained 17–85% of SGI variability, and 10 of 12 included a variable indexing summer precipitation. Three large, abrupt shifts in recent decades from wet to dry conditions (indexed by a seasonal Palmer Drought Severity Index) coincided with dramatically reduced radial growth. Each shift was presumably associated with branch dieback that produced a legacy effect apparent in many SGI series: uncharacteristically low SGI in the year following the shift. My results suggest trees in locations distant from the active channel rely on the regional shallow unconfined aquifer, summer rainfall, or both to meet water demands. The landscape-level differences in the water supplies sustaining these trees imply variable effects from shifts in winter-versus monsoon-related precipitation, and from climate change versus streamflow or groundwater management.

  20. Jorge Luis Borges and the New Physics: the Literature of Modern Science and the Science of Modern Literature

    NASA Astrophysics Data System (ADS)

    Mosher, Mark Robert

    1992-01-01

    By examining the works of the Argentine writer, Jorge Luis Borges, and the parallels it has with modern physics, literature and science converge in their quest for truth regarding the structure and meaning of the universe. The classical perception of physics as a "hard" science--that of quantitative, rational thought which was established during the Newtonian era--has been replaced by the "new physics," which integrates the so-called "soft" elements into its paradigm. It presents us with a universe based not exclusively on a series of particle-like interactions, or a "billiard-ball" hypothesis where discrete objects have a measurable position and velocity in absolute space and time, but rather on a combination of these mechanistic properties and those that make up the non-physical side of nature such as intuition, consciousness, and emotion. According to physicists like James Jeans science has been "humanized" to the extent that the universe as a "great machine" has been converted into a "great thought.". In nearly all his collections of essays and short stories, Borges complements the new physics by producing a literature that can be described as "scientized." The abstract, metaphysical implications and concerns of the new world-view, such as space, time, language, consciousness, free will, determinism, etc., appear repeatedly throughout Borges' texts, and are treated in terms that are remarkably similar to those expressed in the scientific texts whose authors include Albert Einstein, Niels Bohr, Werner Heisenberg, and Erwin Schrodinger. As a final comparison, Borges and post-modern physicists address the question of the individual's ability to ever comprehend the universe. They share an attitude of incredulity toward all models and theories of reality simply because they are based on partial information, and therefore seen only as conjectures.

  1. [Geographic distribution of birds in the Sierra Madre Oriental of San Luis Potosi, Mexico: a regional analysis of conservation status].

    PubMed

    Sahagún Sánchez, Francisco Javier; Navarro, Jaime Castro; Reyes Hernández, Humberto

    2013-06-01

    The Sierra Madre Oriental region in the mexican state of San Luis Potosi is a relevant place for bird conservation at a country level. Therefore the main goal of this study was to analyze the geographic patterns of distribution and the conservation current state of the birds, to support the needs to expand the conservation areas in the future. Data was collected from various databases of zoological museums and collections, and field sampling methods conducted from January 2009 to May 2011. Potential distributions were modeled for 284 species using GARP software and then a map was developed to determine areas with favorable environmental characteristics for the distribution of species richness. Finally, the importance of conservation areas for the potential distribution of birds in the region was evaluated. A total of 359 species were recorded of which 71.4% are permanent residents, 19% are winter migrants and 4% are summer residents. From this total, 41 species were endemic, 47 were species at risk and 149 were neotropical migrants. The largest species richness correspond to oak forests, cloud forests, and tropical moist forests located at altitudes from 100m to 1 500m. Their potential distribution was concentrated towards the center and Southeast of the study area. Only 10% of areas with a high potential conservation was included in areas of priority for bird conservation (AICA) and just 3% of all potential areas were under some governmental category of protection. However, no conservation area has a management plan currently applied and monitored. The information generated is important for the development of management proposals for birds conservation in the region. PMID:23885599

  2. [Prevalence of Staphylococcus aureus isolated from subclinical bovine mastitis in dairies of the city of San Luis].

    PubMed

    Puig de Centorbi, O N; de Cuadrado, A M; Alcaraz, L E; Laciar, A L; de Milán, M C

    1992-01-01

    In order to detect subclinical mastitis by means of California Mastitis Test and recounting of somatic cells, 163 cows from the dairies of San Luis city, Argentina, were examined. Seventy six individuals (46.6%) exhibited an inflammatory response ranging > or = 2+ grade and a cellular recounting value of > or = 5 x 10(5), data compatible with those of subclinical mastitis. Staphylococcus aureus was isolated from 39 (51.3%) cultures as estimated by the sum of the two last values listed in Table 1. Organisms were isolated by plating on brain heart infusion agar with 5% of sheep blood and on Baird-Parker media. One hundred and three S. aureus isolates recovered from 51 of 63 cows were characterized by coagulase activity by the tube method using human and bovine plasma; clumping factor; glucose and mannitol fermentation; thermonuclease (TNase), pigment, gelatinase, fibrinolysin, acetoin, hemolysin production; egg yolk, tellurite and catalase reaction and crystal violet types. All isolates were susceptible to cephalothin, clindamycin, methicillin, gentamycin and vancomycin; 94.1% were susceptible to chloramphenicol and 53.8% to G penicillin. Sixty three isolates (61.1%) were classified according to Hájek and Marsálek scheme as biotype C (bovine and ovine ecovar), 33 isolates (32.0%) were classified as biotype B (swine and poultry ecovar); 1 isolated (0.9%) as intermediate between B and D; 5 isolates (4.8%) as biotype A (human ecovar) and 1 isolated (0.9%) as biotype D (ecovar silvestres spp) (Table 2). Production of enterotoxins A to E and toxic shock syndrome toxin-1 (TSST-1) was determined by the optimal susceptibility plate method on 27 isolates (26.2%) which were coagulase 3+ to 4+ and TNase highly positive. None of them produced enterotoxins including TSST-1. The subclinical mastitis data and the prevalence of S. aureus coincide with those of other authors, both from Argentina and from other countries.

  3. Socio-Urban Spatial Patterns Associated with Dyslipidemia among Schoolchildren in the City of San Luis Potosi, Mexico.

    PubMed

    Aradillas-García, Celia; Palos-Lucio, Gabriela; Padrón-Salas, Aldanely

    2016-02-01

    The places where a child lives and attends to school are both major environmental and social determinants of its present and future health status. Noncommunicable diseases (NCDs) and some of their risk factors among child and adolescent populations are obesity and dyslipidemia, so finding the patterns of distribution of these risk factors by gender, type of school, area, and margination level is important to do health intervention focusing in their necessities to prevent diseases at younger ages. Because of that, a cross-sectional study was performed among elementary and junior high school students from public and private schools in six of the seven areas of the metropolitan zone of San Luis Potosi, Mexico. Biochemical dyslipidemia indicators (triglycerides, total cholesterol, and high-density lipoprotein) and anthropometric data (weight and height) were obtained. Seventeen public schools and five private schools with a total of 383 students were included. More than half of the studied population (53.0%) had elevated triglyceride levels. A total of 330 students (86.2%) had normal levels of total cholesterol with a mean value of 141.7 mg/dl, and 202 schoolchildren (52.8%) had lower than acceptable levels of high-density lipoprotein (HDL) with a mean value of 43.9 mg/dl. There were differences in the levels of high-density protein between the areas and the type of school where they had been studied. Finally, a total of 150 students (39.4%) had at least one altered lipid value and 103 participants (26.9%) had two altered values. Several students, despite their young age, showed a high prevalence of risk factors, so it is important to design programs according to their necessities.

  4. Blood lead concentrations in wild birds from a polluted mining region at Villa de La Paz, San Luis Potosi, Mexico.

    PubMed

    Chapa-Vargas, Leonardo; Mejia-Saavedra, Jose J; Monzalvo-Santos, Karina; Puebla-Olivares, Fernando

    2010-01-01

    This investigation was undertaken to determine the concentrations of lead in bird blood samples from a mining region in central Mexico and to compare concentrations among several different feeding guilds. The study took place in the Mexican state of San Luis Potosi in a region known as "Villa de la Paz." This is one of the most intensely exploited mining regions in central Mexico and has been actively mined for over four centuries. Lead concentrations from bird blood samples taken from four polluted sites were significantly higher than those from a control, unpolluted site (F = 6.3, P < 0.0002). Similarly, mean blood lead concentrations in birds from a highly polluted site were higher than those from a site that has intermediate pollution levels (P < 0.05). In addition, samples from insectivorous birds had significantly lower lead concentrations compared to granivores, frugivores-insectivores, and omnivores (F = 4.86, P = 0.004), and a large proportion of all individuals had blood lead concentrations indicative of low, sub-lethal toxic effects. Finally, in two polluted sites, remarkably small numbers of insectivore-frugivores, and granivores were trapped, and in one polluted site a large number of insectivores was trapped (X(2) = 29.9, P = 0.03), and no differences in proportions of migrants and non-migrants were found among sampling sites (X(2) = 0.6, P = 0.96). To date, it has not been determined to what extent constant exposure to these levels of pollution can influence health at the individual level, lifespan, and, therefore, population demography of birds from this region.

  5. Endemic fluorosis in San Luis Potosi, Mexico. I. Identification of risk factors associated with human exposure to fluoride.

    PubMed

    Grimaldo, M; Borja-Aburto, V H; Ramírez, A L; Ponce, M; Rosas, M; Díaz-Barriga, F

    1995-01-01

    In order to identify risk factors associated with human exposure to fluoride in San Luis Potosi (SLP), Mexico, a biochemical and epidemiological study was carried out in 1992. Results from the analysis of fluoride sources showed that 61% of tap water samples had fluoride levels above the optimal level of 0.7-1.2 ppm. The levels were higher after boiling. In bottled water, fluoride levels ranged from 0.33 to 6.97 ppm. These sources are important since in SLP 82% of the children drink tap water, 31% also drink bottled water, 92% prepare their food with tap water, 44% boiled all the drinking water, and 91% used infant formula reconstituted with boiled water. The prevalence and severity of dental fluorosis in children (11-13 years old) increased as the concentration of water fluoride increased. At levels of fluoride in water lower than 0.7 ppm a prevalence of 69% was found for total dental fluorosis, whereas at levels of fluoride in water higher than 2.0 ppm a prevalence of 98% was found. In the same children, fluoride levels in urine were quantified. The levels increased as the concentration of water fluoride increased. Regressional analysis showed an increment of 0.54 ppm (P < 0.0001) of fluoride in urine for each ppm of fluoride in water. Fluoride urinary levels were higher in samples collected during the afternoon (1800) when compared with sample collected during the morning (1100). Taking together all these results, three risk factors for human exposure to fluoride in SLP can be identified: ambient temperature, boiled water, and food preparation with boiled water. These factors explain the prevalence of dental fluorosis in SLP.

  6. [Geographic distribution of birds in the Sierra Madre Oriental of San Luis Potosi, Mexico: a regional analysis of conservation status].

    PubMed

    Sahagún Sánchez, Francisco Javier; Navarro, Jaime Castro; Reyes Hernández, Humberto

    2013-06-01

    The Sierra Madre Oriental region in the mexican state of San Luis Potosi is a relevant place for bird conservation at a country level. Therefore the main goal of this study was to analyze the geographic patterns of distribution and the conservation current state of the birds, to support the needs to expand the conservation areas in the future. Data was collected from various databases of zoological museums and collections, and field sampling methods conducted from January 2009 to May 2011. Potential distributions were modeled for 284 species using GARP software and then a map was developed to determine areas with favorable environmental characteristics for the distribution of species richness. Finally, the importance of conservation areas for the potential distribution of birds in the region was evaluated. A total of 359 species were recorded of which 71.4% are permanent residents, 19% are winter migrants and 4% are summer residents. From this total, 41 species were endemic, 47 were species at risk and 149 were neotropical migrants. The largest species richness correspond to oak forests, cloud forests, and tropical moist forests located at altitudes from 100m to 1 500m. Their potential distribution was concentrated towards the center and Southeast of the study area. Only 10% of areas with a high potential conservation was included in areas of priority for bird conservation (AICA) and just 3% of all potential areas were under some governmental category of protection. However, no conservation area has a management plan currently applied and monitored. The information generated is important for the development of management proposals for birds conservation in the region.

  7. Sr Isotopes and Migration of Prairie Mammoths (Mammuthus columbi) from Laguna de las Cruces, San Luis Potosi, Mexico

    NASA Astrophysics Data System (ADS)

    Solis-Pichardo, G.; Perez-Crespo, V.; Schaaf, P. E.; Arroyo-Cabrales, J.

    2011-12-01

    Asserting mobility of ancient humans is a major issue for anthropologists. For more than 25 years, Sr isotopes have been used as a resourceful tracer tool in this context. A comparison of the 87Sr/86Sr ratios found in tooth enamel and in bone is performed to determine if the human skeletal remains belonged to a local or a migrant. Sr in bone approximately reflects the isotopic composition of the geological region where the person lived before death; whereas the Sr isotopic system in tooth enamel is thought to remain as a closed system and thus conserves the isotope ratio acquired during childhood. Sr isotope ratios are obtained through the geologic substrate and its overlying soil, from where an individual got hold of food and water; these ratios are in turn incorporated into the dentition and skeleton during tissue formation. In previous studies from Teotihuacan, Mexico we have shown that a three-step leaching procedure on tooth enamel samples is important to assure that only the biogenic Sr isotope contribution is analyzed. The same Sr isotopic tools can function concerning ancient animal migration patterns. To determine or to discard the mobility of prairie mammoths (Mammuthus columbi) found at Laguna de las Cruces, San Luis Potosi, México the leaching procedure was applied on six molar samples from several fossil remains. The initial hypothesis was to use 87Sr/86Sr values to verify if the mammoth population was a mixture of individuals from various herds and further by comparing their Sr isotopic composition with that of plants and soils, to confirm their geographic origin. The dissimilar Sr results point to two distinct mammoth groups. The mammoth population from Laguna de Cruces was then not a family unit because it was composed by individuals originated from different localities. Only one individual was identified as local. Others could have walked as much as 100 km to find food and water sources.

  8. Paleothermal structure of the Point San Luis slab of central California: Effects of Late Cretaceous underplating, out-of-sequence thrusting, and late Cenozoic dextral offset

    NASA Astrophysics Data System (ADS)

    Underwood, Michael B.; Laughland, Matthew M.

    2001-02-01

    Late Cretaceous shale and sandstone turbidites of the Point San Luis "slab" are isoclinally folded, locally sheared, and faulted, but their severity of stratal disruption is relatively mild when compared to adjacent polymictic mélange of the Franciscan Complex. We tested the interpretation of a trench-slope basin origin for these strata by documenting their paleothermal structure, including contacts between turbidites and mélange. Values of mean random vitrinite reflectance (Rm) from turbidites are 0.9-1.7% estimates of maximum paleotemperature are 135°-200°C. Mélange matrix samples yield Rm values of 1.1-2.5%, with an average of 1.5%, and peak temperatures between 160° and 240°C. The turbidite-over-mélange contact is locally "cooler over warmer" and was folded after peak heating. The relatively high paleotemperatures cast doubt on a shallow slope basin model (i.e., 1-2 km burial depth). We suggest, instead, that thermal maturation of the Point San Luis slab occurred much deeper in an accretionary prism (10-15 km), where offscraped trench wedge deposits were faulted against underplated mélange. The paleothermal structure was offset and tilted after peak heating by two out-of-sequence faults. Late Oligocene to Pliocene strata rest unconformably above the Franciscan, and there is a significant gap in thermal maturity across this unconformity, with no evidence to show that Franciscan rocks were reset thermally following the main episode of uplift and erosion. Three-dimensional orientations of isoreflectance surfaces on opposite sides of the San Gregorio-San Simeon-Hosgri fault system also can be used to test interpretations of strike-slip neotectonics. The failure to match these geometries among suspected piercing points at Point San Luis, Cambria, and Point Sur favors a suggestion that differential, post thermal peak, dextral offset of Franciscan basement has not exceeded 10-15 km.

  9. Introduction to the special collection of papers on the San Luis Basin Sustainability Metrics Project: a methodology for evaluating regional sustainability.

    PubMed

    Heberling, Matthew T; Hopton, Matthew E

    2012-11-30

    This paper introduces a collection of four articles describing the San Luis Basin Sustainability Metrics Project. The Project developed a methodology for evaluating regional sustainability. This introduction provides the necessary background information for the project, description of the region, overview of the methods, and summary of the results. Although there are a multitude of scientifically based sustainability metrics, many are data intensive, difficult to calculate, and fail to capture all aspects of a system. We wanted to see if we could develop an approach that decision-makers could use to understand if their system was moving toward or away from sustainability. The goal was to produce a scientifically defensible, but straightforward and inexpensive methodology to measure and monitor environmental quality within a regional system. We initiated an interdisciplinary pilot project in the San Luis Basin, south-central Colorado, to test the methodology. The objectives were: 1) determine the applicability of using existing datasets to estimate metrics of sustainability at a regional scale; 2) calculate metrics through time from 1980 to 2005; and 3) compare and contrast the results to determine if the system was moving toward or away from sustainability. The sustainability metrics, chosen to represent major components of the system, were: 1) Ecological Footprint to capture the impact and human burden on the system; 2) Green Net Regional Product to represent economic welfare; 3) Emergy to capture the quality-normalized flow of energy through the system; and 4) Fisher information to capture the overall dynamic order and to look for possible regime changes. The methodology, data, and results of each metric are presented in the remaining four papers of the special collection. Based on the results of each metric and our criteria for understanding the sustainability trends, we find that the San Luis Basin is moving away from sustainability. Although we understand

  10. Pharmacological aspects of selected herbs employed in Hispanic folk medicine in the San Luis Valley of Colorado, USA: I. Ligusticum porteri (osha) and Matricaria chamomilla (manzanilla).

    PubMed

    Appelt, G D

    1985-03-01

    Interviews with Hispanic families in the San Luis Valley of Colorado delineated several medicinal herbs that are popular in Hispanic folk medicine, including Ligusticum porteri (osha) and Matricaria chamomilla (manzanilla). A search of the scientific literature reveals that related species of Ligusticum and Matricaria chamomilla contain compounds that possess significant pharmacologic activity. This combined information is now being used as a basis for further investigation at the University of Colorado School of Pharmacy in an effort to detect pharmacologic activity in osha and manzanilla preparations. PMID:3990316

  11. A multi-dimensional analysis of the upper Rio Grande-San Luis Valley social-ecological system

    NASA Astrophysics Data System (ADS)

    Mix, Ken

    The Upper Rio Grande (URG), located in the San Luis Valley (SLV) of southern Colorado, is the primary contributor to streamflow to the Rio Grande Basin, upstream of the confluence of the Rio Conchos at Presidio, TX. The URG-SLV includes a complex irrigation-dependent agricultural social-ecological system (SES), which began development in 1852, and today generates more than 30% of the SLV revenue. The diversions of Rio Grande water for irrigation in the SLV have had a disproportionate impact on the downstream portion of the river. These diversions caused the flow to cease at Ciudad Juarez, Mexico in the late 1880s, creating international conflict. Similarly, low flows in New Mexico and Texas led to interstate conflict. Understanding changes in the URG-SLV that led to this event and the interactions among various drivers of change in the URG-SLV is a difficult task. One reason is that complex social-ecological systems are adaptive, contain feedbacks, emergent properties, cross-scale linkages, large-scale dynamics and non-linearities. Further, most analyses of SES to date have been qualitative, utilizing conceptual models to understand driver interactions. This study utilizes both qualitative and quantitative techniques to develop an innovative approach for analyzing driver interactions in the URG-SLV. Five drivers were identified for the URG-SLV social-ecological system: water (streamflow), water rights, climate, agriculture, and internal and external water policy. The drivers contained several longitudes (data aspect) relevant to the system, except water policy, for which only discreet events were present. Change point and statistical analyses were applied to the longitudes to identify quantifiable changes, to allow detection of cross-scale linkages between drivers, and presence of feedback cycles. Agricultural was identified as the driver signal. Change points for agricultural expansion defined four distinct periods: 1852--1923, 1924--1948, 1949--1978 and 1979

  12. Phytoremediation management of selenium-laden drainage sediments in the San Luis Drain: a greenhouse feasibility study.

    PubMed

    Bañuelos, G S; Lin, Z-Q

    2005-11-01

    An estimated 100,000m(3) selenium (Se)-laden drainage sediment resides in the San Luis Drain (SLD) of Central California. This greenhouse study was undertaken to evaluate the feasibility of growing salt- and boron-tolerant plant species in sediment for reduction of Se content by plant extraction. Drainage sediment was collected from the SLD and mixed with control soil (i.e., uncontaminated soil) to the following ratios (sediment:control soil) by volume: 0:3 (i.e., control soil only), 1:2 (i.e., 1/3 sediment and 2/3 control soil), 2:1 (i.e., 2/3 sediment and 1/3 control soil), and 3:0 (i.e., sediment only). Salt-tolerant plant species consisted of canola (Brassica napus var. Hyola 420), tall fescue (Festuca arundinacea var. Au Triumph), salado grass (Sporobulus airoides), and cordgrass (Spartina patens var. Flageo). Increased ratios of sediment:soil resulted in decreased dry matter production for all tested plant species; especially at ratios of sediment:soil greater than 1:2. Plant Se concentrations (mgkg(-1) DM) ranged as follows for plant species at all ratios of sediment:soil: canola (51-72), tall fescue (16-36), and cordgrass and salado grass (9-14). Total Se concentrations in the soil were at least 20% lower at postharvest compared to preplant concentrations for all plant species at each ratio of sediment:soil. In contrast, water-extractable Se concentrations in the soil were at least three times higher at postharvest than at preplant for all plant species, irrespective of the ratio of sediment:soil. Leaching of Se occurred in irrigated bare pots from each respective ratio of sediment:soil over a duration of 60 days. Based upon the downward movement of Se in bare pots of sediment:soil, it may be more prudent to leave the drainage sediment in the SLD, incorporate clean soil, and then grow low maintenance salt-tolerant plants (e.g., cordgrass, salado grass) in the concrete-lined canal. By this means, possible contamination of groundwater with soluble Se will be

  13. Importance of the vertical component of groundwater flow: a hydrogeochemical approach in the valley of San Luis Potosi, Mexico

    NASA Astrophysics Data System (ADS)

    Carrillo-Rivera, J. J.; Cardona, A.; Moss, D.

    1996-11-01

    Fractured volcanics exert a control on groundwater flow in the San Luis Potosi (SLP) valley. The chemical composition and temperature of water pumped from boreholes partially penetrating the fractured volcanics indicate that the produced water originates from an upward vertical flow. Most of the thermal groundwater has been detected in areas related to regional faults and lineaments. Intensive and uncontrolled pumping from the upper {1}/{4} of the aquifer (total depth > 1500 m) causes the rise of water from a deep regional flow system that mixes with the shallower waters. The deep waters contain high fluoride concentrations that contaminate the mixture and cause substantial health related effects. The recharge controls on the regional flow system require further research; however, hydrogeochemical evidence supports the view that the origin of this recharge is limited to the western bounding Sierra Madre Occidental. Higher levels of dissolved Na +, Li +, F - (and SO 4-2) derived from Tertiary volcanics have been introduced into the exploited region; the concentrations indicate lengthy and deep circulation flow. Li + concentration was used as an indicator of groundwater residence time, and therefore of the length of the groundwater flow path. Hydrogeochemical interpretation indicates the presence of three flow systems: a shallow local one controlled by a clay layer that subcrops most of the valley floor, an intermediate system in which water infiltrates just beyond the boundary of the clay layer, and a deep regional system which originates outside the surface catchment. The local and intermediate systems circulate through materials with comparatively low hydraulic conductivity. Low Cl - concentrations suggest rapid flow in the regional system. Concentrations of Li + and F - can be used to calculate percentages of waters in mixtures of regional and intermediate flows. Concentrations of Na +, Ca 2+ and SO 4-2 appear to be controlled by water-rock reactions

  14. Analysis of the potential impacts on surface water quality resulting from the proposed use of the San Luis Drain to transport agricultural drainage through the northern Grasslands

    SciTech Connect

    Quinn, N.W.T.

    1992-05-01

    An Environmental Assessment and initial Study for the interim use of a portion of the San Luis Drain for conveyance water through the Grassland Water District and adjacent Grassland areas was conducted. The project proposes the use of 18 miles of the San Luis Drain for the conveyance of agricultural drainage water for a period of five years and the elimination of agricultural drainage discharges from 76 miles of existing channels in and adjacent to the Grassland Water District. A report was prepared to (a) quantify the potential project effects on surface water quality within Salt and Mud Sloughs and the San Joaquin River using currently available data, and (b) to improve the understanding of existing water supply and drainage operations within the Grassland area. After submission of the original report it was brought to the attention of one of the coauthors that the database on selenium and boron concentrations in drainage water did not include the water quality data collected by the Regional Water Quality Control Board (CRWQCB). In addition, the US Bureau of Reclamation (USBR) requested further examination of Grasslands hydrology to estimate the quantity of supplemental water that would be needed to restore the San Joaquin River to the same TDS and trace element concentrations prior to implementation of the project. This report addresses these issues.

  15. InSAR data produce specific storage estimates for an agricultural area in the San Luis Valley, Colorado

    NASA Astrophysics Data System (ADS)

    Reeves, J.; Knight, R. J.; Zebker, H. A.; Schreuder, W.; Agram, P. S.; Lauknes, T.

    2010-12-01

    The San Luis Valley (SLV) is an 8000 km2 region in southern Colorado that is home to a thriving agricultural economy. This valley is currently in a period of extreme drought, with county and state regulators struggling to develop appropriate management policies in order to sustain water levels in the confined aquifer system. The water level from 1970 - 2000 remains a key, but poorly known, component for characterization. Some relevant data, such as water levels measured in wells, were collected during this period and incorporated into a groundwater flow model. However, data with finer spatial and temporal resolution would be very valuable in understanding the behavior and therefore the management of the system. Spaceborne interferometric synthetic aperture radar (InSAR) data provide maps of the deformation of the Earth’s surface at a spatial resolution of 50 m; these data are acquired approximately once per month. The deformation measured by InSAR can be related to water levels in the confined aquifer system. However, changes in cm-scale crop structure in agricultural areas lead to signal decorrelation over long periods of time, resulting in low quality data. Here we apply the recently developed small baseline subset (SBAS) analysis to InSAR data collected by the European Space Agency’s ERS-1 and ERS-2 satellites over the western SLV for the years 1992-2001. The SBAS measurements show high levels of InSAR correlation, denoting high quality data, in areas between the center pivot irrigation circles, where the lack of water results in little surface vegetation. By using SBAS analysis, we are able to estimate the magnitude of the seasonal deformation and compare it with hydraulic head measurements in nearby wells. We directly compare, at three well locations, specific storage parameters estimated from InSAR data to those estimated using traditional pump test techniques. The InSAR and pump test estimated parameters are: 3.4 x10-5 ft-1 vs. 1.7 x 10-5 ft-1, 2.2 x 10

  16. Selected water-quality characteristics and flow of ground water in the San Luis basin, including the Conejos River subbasin, Colorado and New Mexico

    USGS Publications Warehouse

    Williams, R.S.; Hammond, S.E.

    1989-01-01

    Chemical analyses of water from 99 wells and 19 springs in the San Luis basin in Colorado and New Mexico were evaluated to determine selected water quality characteristics as an aid in understanding the flow of groundwater in the basin. The evaluation shows that the distribution of chemical water types in the basin is consistent with chemical changes to be expected along flow paths in rocks typical of those in the basin. The San Luis basin area is underlain by a surficial (< 100-ft-thick) unconfined aquifer and, in turn, by a confining bed and a deeper confined aquifer. Previous studies have indicated that the groundwater system is recharged around the edges of the basin and that groundwater then moves toward discharge areas in the topographically closed part of the basin and along principal streams. The evaluation of water quality data showed that groundwater at the perimeter of the San Luis basin is primarily a calcium bicarbonate type, which is typical in recharge areas. Groundwater near the center of the basin is primarily a sodium bicarbonate type, which is typical of groundwater in downgradient areas. The change in principal cation from calcium to sodium indicates chemical evolution of the water along the groundwater flow path and supports previously developed concepts of groundwater movement in the basin. The exchange of calcium for sodium along the flow path also is assumed to occur in the Conejos River subbasin. Upgradient wells yield calcium bicarbonate type water, whereas downgradient wells yield sodium bicarbonate type water. However, an exception to this relation is found at McIntire Spring, which yields calcium bicarbonate type water from a downgradient location. The source of water discharging from the spring may be the confined aquifer, with hydraulic connection along the Manassa fault. The concentration of dissolved solids in water from both the unconfined and confined aquifers increases downgradient. The increase is dramatic in the closed basin

  17. Hydraulic head levels and aquifer parameters inferred from a joint analysis of InSAR and well data in the San Luis Valley, Colorado

    NASA Astrophysics Data System (ADS)

    Chen, J.; Knight, R. J.; Zebker, H. A.

    2015-12-01

    Groundwater extraction is the primary source of irrigation water in many agricultural regions throughout the world. A set of spatially dense hydraulic head measurements adequately sampling the aquifer is a critical metric needed for effective water management. Because the total compaction due to pumping is nearly proportional to the change in hydraulic head, land subsidence measurements derived from InSAR data can be used to obtain head measurements in confined aquifers when well data are unavailable or insufficiently dense. Reeves at al. (2013) demonstrated that C-band ERS InSAR data acquired between 1992 and 2000 over the San Luis Valley of Colorado suffice to fill temporal gaps in the hydraulic head field dataset at 3 well locations. Here, we further analyze whether the InSAR deformation time series can be used to infer head levels over a larger region than Reeves et al. analyzed. We processed 17 L-band ALOS radar scenes over the San Luis Valley acquired between Jan., 2007 and Mar., 2011 and applied an adaptive interpolation filter between persistent scatterer pixels to reduce vegetation decorrelation artifacts. We estimated the InSAR deformation time series at each image point using a least-squares SBAS approach. We then jointly analyzed the InSAR and the well data to estimate the local skeletal storage coefficient and the time delay between the head change and deformation and converted the InSAR deformation time series to InSAR head levels. The resulting InSAR-head and well-head measurements in the San Luis valley show good agreement with all 18 well measurements in the region with confined aquifer pumping activities. Assuming that geologic parameters such as skeletal storage coefficients often vary slowly in space, we interpolate the obtained skeletal storage coefficients at each well spatially to relate InSAR subsidence measurements over the entire SLV to changes in head with improved spatial resolution over the well data. This demonstration shows that In

  18. 2007 Rocky Mountain Section Friends of the Pleistocene Field Trip - Quaternary Geology of the San Luis Basin of Colorado and New Mexico, September 7-9, 2007

    USGS Publications Warehouse

    Machette, Michael N.; Coates, Mary-Margaret; Johnson, Margo L.

    2007-01-01

    Prologue Welcome to the 2007 Rocky Mountain Cell Friends of the Pleistocene Field Trip, which will concentrate on the Quaternary geology of the San Luis Basin of Colorado and New Mexico. To our best knowledge, Friends of the Pleistocene (FOP) has never run a trip through the San Luis Basin, although former trips in the region reviewed the 'Northern Rio Grande rift' in 1987 and the 'Landscape History and Processes on the Pajarito Plateau' in 1996. After nearly a decade, the FOP has returned to the Rio Grande rift, but to an area that has rarely hosted a trip with a Quaternary focus. The objective of FOP trips is to review - in the field - new and exciting research on Quaternary geoscience, typically research being conducted by graduate students. In our case, the research is more topically oriented around three areas of the San Luis Basin, and it is being conducted by a wide range of Federal, State, academic, and consulting geologists. This year's trip is ambitious?we will spend our first day mainly on the Holocene record around Great Sand Dunes National Park and Preserve, the second day on the Quaternary stratigraphy around the San Luis Hills, including evidence for Lake Alamosa and the 1.0 Ma Mesita volcano, and wrap up the trip's third day in the Costilla Plain and Sunshine Valley reviewing alluvial stratigraphy, the history of the Rio Grande, and evidence for young movement on the Sangre de Cristo fault zone. In the tradition of FOP trips, we will be camping along the field trip route for this meeting. On the night before our trip, we will be at the Great Sand Dunes National Park and Preserve's Pinyon Flats Campground, a group facility located about 2 miles north of the Visitors Center. After the first day's trip, we will dine and camp in the Bachus pit, about 3 miles southwest of Alamosa. For the final night (after day 2), we will bed down at La Junta Campground at the Bureau of Land Management (BLM) Wild and Scenic Rivers State Recreation Area, west of Questa

  19. The institutionalization of biology in Mexico in the early 20th century: the conflict between Alfonso Luis Herrera (1865-1942) and Isaac Ochoterena (1885-1950).

    PubMed

    Ledesma-Mateos, Ismael; Barahona, Ana

    2003-01-01

    The aim of this work is to evaluate the role played by Alfonso Luis Herrera and Isaac Ochoterena in the institutionalization of academic biology in Mexico in the early 20th century. As biology became institutionalized in Mexico, Herrera's basic approach to biology was displaced by Isaac Ochoterena's professional goals due to the prevailing political conditions at the end of the 1929. The conflict arose from two different conceptions of biology, because Herrera and Ochoterena had different discourses that were incommensurable, not only linguistically speaking, but also socioprofessionally. They had different links to influential groups related to education, having distinct political and socioprofessional interests. The conflict between Herrera and Ochoterena determined the way in which professional biology education has developed in Mexico, as well as the advancement in specific research subjects and the neglect of others.

  20. Integration of geology, non-seismic geophysics and seismic data in a structurally complex, frontier oil play: Northern Sangre de Cristo Mountains/Northeast San Luis Basin, Colorado

    SciTech Connect

    Watkins, T.A.; Belcher, J.S.; Gries, R.

    1995-06-01

    The discovery of live Cretaceous oil in mineral exploration drill holes, followed by the identification of Mesozoic sediments in outcrop and in shallow drill holes, has lead to an integrated approach to exploration of a structurally complex, frontier oil play in south-central Colorado. Gravity, aeromagnetic, magnetotelluric (MT), and time domain electromagnetic (TDEM) data were acquired and interpreted in the initial stages of the project. Models derived from the geophysical data were augmented with geologic field work to explain specific anomalies. Interpretation of the gravity data was constrained by density measurements on representative rock samples collected in the field. Seismic data, acquired in the most recent exploration stage, provided confirmation and modification of the basin margin geometry. Velocity data from the seismic was integrated with resistivity, density, magnetic and geologic data to predict lithologies on an intermediate fault block located between the Sangre de Cristo Mountains and the San Luis Basin.

  1. Selex

    NASA Astrophysics Data System (ADS)

    Morelos, Antonio

    2000-08-01

    A summary of the path which lead to a high energy physics group at Instituto de Física de la Universidad Autónoma de San Luis Potosí is presented. This group is the result of the initial push made by Leon Lederman at the beginning of the 80's. .

  2. Forecasting selenium discharges to the San Francisco Bay-Delta Estuary: ecological effects of a proposed San Luis drain extension

    USGS Publications Warehouse

    Luoma, Samuel N.; Presser, Theresa S.

    2000-01-01

    During the next few years, federal and state agencies may be required to evaluate proposals and discharge permits that could significantly change selenium (Se) inputs to the San Francisco Bay-Delta Estuary (Bay-Delta), particularly in the North Bay (i.e., Suisun Bay and San Pablo Bay). These decisions may include discharge requirements for an extension of the San Luis Drain (SLD) to the estuary to convey subsurface agricultural drainage from the western San Joaquin Valley (SJV), a renewal of an agreement to allow the existing portion of the SLD to convey subsurface agricultural drainage to a tributary of the San Joaquin River (SJR) (coincident with changes in flow patterns of the lower SJR), and refinements to promulgated Se criteria for the protection of aquatic life for the estuary. Understanding the biotransfer of Se is essential to evaluating the fate and impact of proposed changes in Se discharges to the Bay-Delta. However, past monitoring programs have not addressed the specific protocols necessary for an element that bioaccumulates. Confusion about Se threats in the past have stemmed from failure to consider the full complexity of the processes that result in Se toxicity. Past studies show that predators are more at risk from Se contamination than their prey, making it difficult to use traditional methods to predict risk from environmental concentrations alone. In this report, we employ a novel procedure to model the fate of Se under different, potentially realistic load scenarios from the SJV. For each potential load, we progressively forecast the resulting environmental concentrations, speciation, transformation to particulate form, bioaccumulation by invertebrates, trophic transfer to predators, and effects in those predators. Enough is known to establish a first order understanding of effects should Se be discharged directly into the North Bay via a conveyance such as the SLD. Our approach uses 1) existing knowledge concerning the biogeochemical

  3. Identification and distribution of cotton rats, genus Sigmodon (Muridae: Sigmodontinae), of Nayarit, M?xico

    USGS Publications Warehouse

    Carleton, M.D.; Fisher, R.D.; Gardner, A.L.

    1999-01-01

    Morphological, chromosomal, distributional, and ecological data are presented for three species of Sigmodon (S. alleni, S. arizonae, and S. mascotensis) from the state of Nayarit, Mexico. The species were collected in all possible pairwise combinations of sympatry, including the first record of such documented for S. arizonae and S. mascotensis. Emphasis is devoted to the discrimination of S. arizonae and S. mascotensis, from each other and from typical S. hispidus, using qualitative features of the skin and skull and morphometric analyses of craniodental measurements. Based on these results and examination of type specimens, additional synonyms of S. mascotensis are identified, with reassignment of two forms, tonalensis Bailey (1902) and obvelatus Russell (1952), currently mistaken as subspecies of S. hispidus. Sigmodon mascotensis emerges as a species distributed from southern Nayarit and Zacatecas to extreme western Chiapas, where it inhabits deciduous or semi-deciduous tropical vegetation having a pronounced dry season. These reallocations and other reidentifications remove any documentation for S. hispidus along the entire Pacific versant of Mexico.

  4. Regression models of monthly water-level change in and near the Closed Basin Division of the San Luis Valley, south-central Colorado

    USGS Publications Warehouse

    Watts, Kenneth R.

    1995-01-01

    The Bureau of Reclamation is developing a water-resource project, the Closed Basin Division, in the San Luis Valley of south-central Colorado that is designed to salvage unconfined ground water that currently is discharged as evapotranspiration. The water table in and near the 130,000-acre Closed Basin Division area will be lowered by an annual withdrawal of as much as 100,000 acre-feet of ground water from the unconfined aquifer. The legislation authorizing the project limits resulting drawdown of the water table in preexisting irrigation and domestic wells outside the Closed Basin Division to a maximum of 2 feet. Water levels in the closed basin in the northern part of the San Luis Valley historically have fluctuated more than 2 feet in response to water-use practices and variation of climatically controlled recharge and discharge. Declines of water levels in nearby wells that are caused by withdrawals in the Closed Basin Division can be quantified if water-level fluctuations that result from other water-use practices and climatic variations can be estimated. This study was done to evaluate water-level change at selected observation wells in and near the Closed Basin Division. Regression models of monthly water-level change were developed to predict monthly water-level change in 46 selected observation wells. Predictions of monthly water-level change are based on one or more of the following: elapsed time, cosine and sine functions with an annual period, streamflow depletion of the Rio Grande, electrical use for agricultural purposes, runoff into the closed basin, precipitation, and mean air temperature. Regression models for five of the wells include only an intercept term and either an elapsed-time term or terms determined by the cosine and sine functions. Regression models for the other 41 wells include 1 to 4 of the 5 other variables, which can vary from month to month and from year to year. Serial correlation of the residuals was detected in 24 of the

  5. Latest Miocene-earliest Pliocene evolution of the ancestral Rio Grande at the Española-San Luis Basin boundary, northern New Mexico

    USGS Publications Warehouse

    Daniel J. Koning,; Scott Aby,; Grauch, V. J.; Matthew J. Zimmerer,

    2016-01-01

    We use stratigraphic relations, paleoflow data, and 40Ar/39Ar dating to interpret net aggradation, punctuated by at least two minor incisional events, along part of the upper ancestral Rio Grande fluvial system between 5.5 and 4.5 Ma (in northern New Mexico). The studied fluvial deposits, which we informally call the Sandlin unit of the Santa Fe Group, overlie a structural high between the San Luis and Española Basins. The Sandlin unit was deposited by two merging, west- to southwest-flowing, ancestral Rio Grande tributaries respectively sourced in the central Taos Mountains and southern Taos Mountains-northeastern Picuris Mountains. The river confluence progressively shifted southwestward (downstream) with time, and the integrated river (ancestral Rio Grande) flowed southwards into the Española Basin to merge with the ancestral Rio Chama. Just prior to the end of the Miocene, this fluvial system was incised in the southern part of the study area (resulting in an approximately 4–7 km wide paleovalley), and had sufficient competency to transport cobbles and boulders. Sometime between emplacement of two basalt flows dated at 5.54± 0.38 Ma and 4.82±0.20 Ma (groundmass 40Ar/39Ar ages), this fluvial system deposited 10–12 m of sandier sediment (lower Sandlin subunit) preserved in the northern part of this paleovalley. The fluvial system widened between 4.82±0.20 and 4.50±0.07 Ma, depositing coarse sand and fine gravel up to 14 km north of the present-day Rio Grande. This 10–25 m-thick sediment package (upper Sandlin unit) buried earlier south- to southeast-trending paleovalleys (500–800 m wide) inferred from aeromagnetic data. Two brief incisional events are recognized. The first was caused by the 4.82±0.20 Ma basalt flow impounding south-flowing paleodrainages, and the second occurred shortly after emplacement of a 4.69±0.09 Ma basalt flow in the northern study area. Drivers responsible for Sandlin unit aggradation may include climate

  6. Digital data and derivative products from a high-resolution aeromagnetic survey of the central San Luis basin, covering parts of Alamosa, Conejos, Costilla, and Rio Grande counties, Colorado, and Taos county, New Mexico

    USGS Publications Warehouse

    Bankey, Viki; Grauch, V.J.S.; Webbers, Ank; PRJ, Inc

    2005-01-01

    This report describes data collected from a high-resolution aeromagnetic survey flown over the central San Luis basin during October, 2004, by PRJ, Inc., on contract to the U.S. Geological Survey (USGS). The survey extends from just north of Alamosa, Colorado, southward to just northwest of Taos, New Mexico. It covers large parts of the San Luis Valley in Alamosa, Conejos, Costilla, and Rio Grande Counties, southern Colorado, and the Taos Plateau in Taos County, northern New Mexico. The survey was designed to complement two surveys previously acquired along the eastern borders of the San Luis Basin over the vicinities of Taos, New Mexico (Bankey and others, 2004a) and Blanca, Colorado (Bankey and others, 2004b). Our overall objective in conducting these surveys is to improve knowledge of the subsurface geologic framework in order to understand ground-water systems in populated alluvial basins along the Rio Grande. These USGS efforts are conducted in collaboration with other federal, state, and local governmental entities where possible.

  7. Geophysical logging to determine construction, contributing zones, and appropriate use of water levels measured in confined-aquifer network wells, San Luis Valley, Colorado, 1998-2000

    USGS Publications Warehouse

    Brendle, D.L.

    2002-01-01

    Geophysical logs were recorded in 32 wells in the confined-aquifer monitoring well network maintained by the Rio Grande Water Conservation District. Logging results were used to determine well construction, zones contributing water to the wells, and the purposes for which the ground-water levels measured in the wells can be used. The confined-aquifer well network consists of 42 flowing and nonflowing wells. This network consists of wells used to supply water for irrigation, household use, wildlife refuge supply, and stock use, and wells for water-level monitoring. Geophysical logs recorded in the wells included video, caliper, water specific conductance, water temperature, and water flow. Most wells in the confined-aquifer well network yield a composite water level representing water levels in multiple permeable zones in the confined-aquifer system of the San Luis Valley. A potentiometric-surface map constructed using November 2000 water levels indicates that water levels from most wells in the network are correlated with water levels from nearby network wells. Potentiometric-surface maps that are constructed from water levels measured in most of the wells in the network can be used to understand long-term local and regional changes in water levels in the confined-aquifer system. Water levels measured in 8 of the 42 wells in the confined-aquifer network are not representative of water levels in the confined-aquifer system.

  8. [Species, dynamics and population composition of phthirapteran in free-range chickens (Gallus gallus L.) in São Luis Island, State of Maranhão].

    PubMed

    Guerra, Rita de M S N de C; Chaves, Elba P; Passos, Tarsila M G; Santos, Ana C G Dos

    2008-01-01

    The objective of this work was to identify the phthirapteran species, to determine the prevalence according to the anatomical region of the body and to know the dynamics and composition of the population of these ectoparasites in free-range chicken in São Luis Island, state of Maranhão. Inspection was performed in 40 chickens and feathers were collected from the head, neck, wing, thigh, dorsal and ventral regions and cloacae. The phthirapteran species identified were: Menopon gallinae L., Menacanthus stramineus Nitzsch, Menacanthus pallidulus Neumann, Menacanthus cornutus Schommer (Menoponidae), and Lipeurus caponis L., Goniodes dissimilis Denny and Goniocotes gallinae De Geer (Philopteridae). L. caponis was collected from all regions sampled, including the head, which was the least infested region. The dorsum was the most infested, especially in the dry period of the year and where the greater parasitic diversity was observed, the wing and the head were the least infested regions. Considering the dynamics and the composition of the population the phthirapteran presented a prevalence of 85% of the sampled chickens, the mean intensity of infestation was 45.3 varying from <1 to 453. The egg stage was superior to the others life stages followed by nymphs and female adults, independent of the phthirapteran species.

  9. Arbuscular mycorrhizal fungi enhance fruit growth and quality of chile ancho (Capsicum annuum L. cv San Luis) plants exposed to drought.

    PubMed

    Mena-Violante, Hortencia G; Ocampo-Jiménez, Omar; Dendooven, Luc; Martínez-Soto, Gerardo; González-Castañeda, Jaquelina; Davies, Fred T; Olalde-Portugal, Víctor

    2006-06-01

    The effect of arbuscular mycorrhizal fungi (AMF) and drought on fruit quality was evaluated in chile ancho (Capsicum annuum L. cv San Luis). AMF treatments were (1) Glomus fasciculatum (AMFG), (2) a fungal species consortium from the forest "Los Tuxtla" in Mexico (AMFT), (3) a fungal species consortium from the Sonorian desert in Mexico (AMFD), and (4) a noninoculated control (NAMF). Plants were exposed to a 26-day drought cycle. Fruit quality was determined by measuring size (length, width, and pedicel length), color, chlorophyll, and carotenoid concentration. Under nondrought conditions, AMFG produced fruits that were 13% wider and 15% longer than the NAMF treatment. Under nondrought conditions, fruit fresh weight was 25% greater in the AMFG treatment compared to the NAMF. Under drought, fruits in the AMFT and AMFD treatments showed fresh weights similar to those in the NAMF treatment not subjected to drought. Fruits of the AMFG treatment subjected to drought showed the same color intensity and chlorophyll content as those of the nondroughted NAMF treatment and carotenoid content increased 1.4 times compared to that in the NAMF not exposed to drought. It is interesting to note that fruits in the AMFD treatment subjected to drought and the NAMF treatment not exposed to drought reached the same size. AMFD treatment increased the concentration of carotenes (1.4 times) under nondrought conditions and the concentration of xanthophylls (1.5 times) under drought when compared to the nondroughted NAMF treatment.

  10. Plant endemism in the Sierras of Córdoba and San Luis (Argentina): understanding links between phylogeny and regional biogeographical patterns1

    PubMed Central

    Chiapella, Jorge O.; Demaio, Pablo H.

    2015-01-01

    Abstract We compiled a checklist with all known endemic plants occurring in the Sierras of Córdoba and San Luis, an isolated mountainous range located in central Argentina. In order to obtain a better understanding of the evolutionary history, relationships and age of the regional flora, we gathered basic information on the biogeographical and floristic affinities of the endemics, and documented the inclusion of each taxon in molecular phylogenies. We listed 89 taxa (including 69 species and 20 infraspecific taxa) belonging to 53 genera and 29 families. The endemics are not distributed evenly, being more abundant in the lower than in the middle and upper vegetation belts. Thirty-two genera (60.3%) have been included in phylogenetic analyses, but only ten (18.8%) included local endemic taxa. A total of 28 endemic taxa of the Sierras CSL have a clear relationship with a widespread species of the same genus, or with one found close to the area. Available phylogenies for some taxa show divergence times between 7.0 – 1.8 Ma; all endemic taxa are most probably neoendemics sensu Stebbins and Major. Our analysis was specifically aimed at a particular geographic area, but the approach of analyzing phylogenetic patterns together with floristic or biogeographical relationships of the endemic taxa of an area, delimited by clear geomorphological features, could reveal evolutionary trends shaping the area. PMID:25878555

  11. Opportunities for Open Automated Demand Response in Wastewater Treatment Facilities in California - Phase II Report. San Luis Rey Wastewater Treatment Plant Case Study

    SciTech Connect

    Thompson, Lisa; Lekov, Alex; McKane, Aimee; Piette, Mary Ann

    2010-08-20

    This case study enhances the understanding of open automated demand response opportunities in municipal wastewater treatment facilities. The report summarizes the findings of a 100 day submetering project at the San Luis Rey Wastewater Treatment Plant, a municipal wastewater treatment facility in Oceanside, California. The report reveals that key energy-intensive equipment such as pumps and centrifuges can be targeted for large load reductions. Demand response tests on the effluent pumps resulted a 300 kW load reduction and tests on centrifuges resulted in a 40 kW load reduction. Although tests on the facility?s blowers resulted in peak period load reductions of 78 kW sharp, short-lived increases in the turbidity of the wastewater effluent were experienced within 24 hours of the test. The results of these tests, which were conducted on blowers without variable speed drive capability, would not be acceptable and warrant further study. This study finds that wastewater treatment facilities have significant open automated demand response potential. However, limiting factors to implementing demand response are the reaction of effluent turbidity to reduced aeration load, along with the cogeneration capabilities of municipal facilities, including existing power purchase agreements and utility receptiveness to purchasing electricity from cogeneration facilities.

  12. Association between Urine Fluoride and Dental Fluorosis as a Toxicity Factor in a Rural Community in the State of San Luis Potosi

    PubMed Central

    Jarquín-Yañez, Lizet; Mejía-Saavedra, José de Jesús; Molina-Frechero, Nelly; Gaona, Enrique; Rocha-Amador, Diana Olivia; López-Guzmán, Olga Dania; Bologna-Molina, Ronell

    2015-01-01

    Objective. The aim of this study is to investigate urine fluoride concentration as a toxicity factor in a rural community in the state of San Luis Potosi, Mexico. Materials and Methods. A sample of 111 children exposed to high concentrations of fluoride in drinking water (4.13 mg/L) was evaluated. Fluoride exposure was determined by measuring urine fluoride concentration using the potentiometric method with an ion selective electrode. The diagnosis of dental fluorosis was performed by clinical examination, and the severity of damage was determined using Dean's index and the Thylstrup-Fejerskov (TF) index. Results. The range of exposure in the study population, evaluated through the fluoride content in urine, was 1.1 to 5.9 mg/L, with a mean of 3.14 ± 1.09 mg/L. Dental fluorosis was present in all subjects, of which 95% had severe cases. Higher urine fluoride levels and greater degrees of severity occurred in older children. Conclusions. The results show that dental fluorosis was determined by the presence of fluoride exposure finding a high positive correlation between the severity of fluorosis and urine fluoride concentration and the years of exposure suggested a cumulative effect. PMID:25789336

  13. Non-seismic geophysics compared and integrated with seismic in a frontier oil play: Northern Sangre de Cristo Mountains/Northeast San Luis Basin, Colorado

    SciTech Connect

    Longacre, M.B.; Christopherson, K.R.; Gries, R.

    1995-06-01

    Four non-seismic geophysical tools have made a significant contribution to a new geological interpretation of the northern Sangre de Cristo Mountains/northeast San Luis Basin of south-central Colorado. Gravity, aeromagnetic, magnetotelluric, (MT) and time domain electromagnetic (TDEM) data were acquired and interpreted during the early stages of exploration. Two-dimensional modeling of the gravity and magnetics placed the main, basin-bounding fault three miles southwest of the mountain front, identified an intermediate fault block at the basin margin and identified a thick sequence of non-magnetic, intermediate density rocks on top of this block. A thick section of Mesozoic sediments is interpreted, supported by the discovery of outcrops of Cretaceous sediments and live Cretaceous oil. Magnetotelluric data was acquired to confirm the presence of Mesozoic sediments and depth to basement. Detailed TDEM data has been useful in correlating the MT with surface geology. Integration of the gravity, magnetic and MT data with seismic resulted in minor modifications to the new geological model.

  14. Determinants of scientific output: an in-depth view of the productivity of tropical botanist and conservationist, Luis Diego Gómez Pignataro.

    PubMed

    Monge-Nájera, Julián; Nielsen-Muñoz, Vanessa; Beatriz Azofeifa, Ana

    2010-12-01

    Bibliometric studies have found that male researchers have their greatest productivity around the age of 40, that female researchers produce less than their male colleagues, that incentives for collaboration are slow to affect productivity and that, just like humans, research institutes become larger, less productive, more expensive to maintain and less able to raise money as they grow old. Almost invariably, these conclusions come from statistical studies of large numbers of European and American scientists, and there are practically no studies about tropical researchers. We present an in-depth analysis of the productivity of an internationally recognized tropical botanist and conservationist, Luis Diego Gómez Pignataro, based on the totality of his published work and on our own knowledge, as co-workers and friends, of the life frame in which that scientific output was produced. His life output departs from the expected pattern in that he had the highest productivity before reaching the expected peak productivity age, and that when he reached it his productivity fell and never recovered. Furthermore, marriage did not produce the expected fall in productivity. A close analysis of his life indicates that in the middle of his career he switched to intense teaching and conservation activities, and this better explains why his output of scientific research articles was low afterwards. This switch may occur in other tropical scientists.

  15. Water-quality assessment of the Rio Grande Valley, Colorado, New Mexico, and Texas; shallow ground-water quality of a land-use area in the San Luis Valley, south-central Colorado, 1993

    USGS Publications Warehouse

    Anderholm, S.K.

    1996-01-01

    This report describes the quality of shallow ground water in an agricultural area in the San Luis Valley, Colorado, and discusses how natural and human factors affect the quality of shallow ground water. Thirty-five wells were installed, and water samples were collected from these wells and analyzed for selected dissolved common constituents, nutrients, trace elements, radionuclides, and synthetic organic compounds. The San Luis Valley is a high intermontane valley that is partially drained by the Rio Grande. The San Luis Valley land-use study area was limited to a part of the valley where the depth to water is generally less than 25 feet. The area where the 35 monitor wells were installed was further limited to the part of the study area where center-pivot overhead sprinklers are used to irrigate crops. Precipitation, runoff from adjacent mountainous areas, and ground-water inflow from the adjacent mountainous areas are the main sources of water to the aquifers in the San Luis Valley. Discharge of water from the shallow, unconfined aquifer in the valley is mainly from evapotranspiration. The dominant land use in the San Luis Valley is agriculture, although nonirrigated land and residential land are interspersed with agricultural land. Alfalfa, native hay, barley, wheat, potatoes, and other vegetables are the main crops. Dissolved-solids concentrations in shallow ground water sampled ranged from 75 to 1,960 milligrams per liter. The largest median concentration of cations was for calcium, and the largest median concentration of anions was for bicarbonate in shallow ground water in the San Luis Valley. Calcium concentrations ranged from 7.5 to 300 milligrams per liter, and bicarbonate concentrations ranged from 28 to 451 milligrams per liter. Nitrite plus nitrate concentrations ranged from less than 0.1 to 58 milligrams per liter as N; water from 11 wells had nitrite plus nitrate concentrations greater than 10 milligrams per liter as N. With the exception of the

  16. Nitrate concentrations, 1936-99, and pesticide concentrations, 1990-99, in the unconfined aquifer in the San Luis Valley, Colorado

    USGS Publications Warehouse

    Stogner, Robert W.

    2001-01-01

    ineffective in evaluating variations in the amount of nitrate leaching associated with differences in application rates. It was concluded that irrigation practices have the greatest effect on leaching of nitrate to the aquifer. Management tools, such as irrigation scheduling, center-pivot sprinkler systems, soil and ground-water nitrogen credits, and cultivation of cover and winter crops, are being used to help maintain crop quality and yields while minimizing the potential of leaching and reducing residual nitrogen left in the soil. Review of available data from previous studies indicates that most of the sampled wells with elevated nitrate concentrations are located in the intensively cultivated area north of the Rio Grande. This area represents about 10 percent of the San Luis Valley and approximately 35 percent of the crop and pasture land in the valley. The area where nitrate concentrations exceed the U.S. Environmental Protection Agency drinking water maximum contaminant level represents about 150 square miles or 5 percent of the valley. Aquifer vulnerability to and contamination by pesticides was not evaluated until the 1990's. Risk analyses indicated that selected pesticides can pose a contamination threat to an unconfined aquifer in areas consisting primarily of sandy loam soil; sandy loam soils are common in the San Luis Valley. Water-quality samples collected from some wells during 1990 and 1993 indicated trace- to low-level pesticide contamination. The occurrence of pesticides was infrequent and isolated.

  17. New isotopic dating of intrusive rocks in the Sierra de San Luis (Argentina): implications for the geodynamic history of the Eastern Sierras Pampeanas

    NASA Astrophysics Data System (ADS)

    von Gosen, W.; Loske, W.; Prozzi, C.

    2002-06-01

    U-Pb datings of zircons from intrusions in the metamorphic complex of the Sierra de San Luis (Eastern Sierras Pampeanas, Argentina) suggest that the depositional, tectonic, metamorphic, and magmatic history in this part of the Pampean Terrane spans the Proterozoic through Early Paleozoic time interval. The Paso del Rey Granite intruded a clastic succession at 608+26/-25 Ma and, afterward, was deformed together with the country rocks. The intrusions of the Rı´o Claro Granite and La Escalerilla Granite at 490±15 and 507±24 Ma, respectively, mark the onset of Famatinian arc plutonism due to east-directed subduction beneath the Eastern Sierras Pampeanas. The new data, along with structural analyses and published results of isotopic dating, allow an interpretation of the history in this segment of the Pampean Terrane. After basement formation, Late Proterozoic turbiditic sedimentation in a passive margin setting was accompanied by block faulting and continued at least to the Early Cambrian. It is assumed that the Pampean Terrane represents a detached fragment of the Rı´o de La Plata Craton in the east. The first deformation in the Micaschist Group was an effect of an early stage of the compressive Pampean event, which is related to the collision of the Pampean Terrane with the Rı´o de La Plata Craton. The Early Cambrian is recorded by injections of acid magmatic sills and dykes, probably under overall crustal extension. This also indicates an age of the turbiditic sediments comparable to that of the Puncoviscana Formation s.l. of northwest Argentina. After cessation of Famatinian arc plutonism, compression and regional metamorphism affected the intrusives, clastic succession, and older basement units. The related amalgamation of the Cuyania (Precordillera) Terrane with the Eastern Sierras Pampeanas was completed during the Early Devonian.

  18. High quality InSAR data linked to seasonal change in hydraulic head for an agricultural area in the San Luis Valley, Colorado

    NASA Astrophysics Data System (ADS)

    Reeves, Jessica A.; Knight, Rosemary; Zebker, Howard A.; Schreüder, Willem A.; Shanker Agram, Piyush; Lauknes, Tom R.

    2011-12-01

    In the San Luis Valley (SLV), Colorado legislation passed in 2004 requires that hydraulic head levels in the confined aquifer system stay within the range experienced in the years 1978-2000. While some measurements of hydraulic head exist, greater spatial and temporal sampling would be very valuable in understanding the behavior of the system. Interferometric synthetic aperture radar (InSAR) data provide fine spatial resolution measurements of Earth surface deformation, which can be related to hydraulic head change in the confined aquifer system. However, change in cm-scale crop structure with time leads to signal decorrelation, resulting in low quality data. Here we apply small baseline subset (SBAS) analysis to InSAR data collected from 1992 to 2001. We are able to show high levels of correlation, denoting high quality data, in areas between the center pivot irrigation circles, where the lack of water results in little surface vegetation. At three well locations we see a seasonal variation in the InSAR data that mimics the hydraulic head data. We use measured values of the elastic skeletal storage coefficient to estimate hydraulic head from the InSAR data. In general the magnitude of estimated and measured head agree to within the calculated error. However, the errors are unacceptably large due to both errors in the InSAR data and uncertainty in the measured value of the elastic skeletal storage coefficient. We conclude that InSAR is capturing the seasonal head variation, but that further research is required to obtain accurate hydraulic head estimates from the InSAR deformation measurements.

  19. Detection and Characterization of Shiga Toxin Producing Escherichia coli, Salmonella spp., and Yersinia Strains from Human, Animal, and Food Samples in San Luis, Argentina

    PubMed Central

    Favier, Gabriela Isabel; Lucero Estrada, Cecilia; Cortiñas, Teresa Inés; Escudero, María Esther

    2014-01-01

    Shiga toxin producing Escherichia coli (STEC), Salmonella spp., and Yersinia species was investigated in humans, animals, and foods in San Luis, Argentina. A total of 453 samples were analyzed by culture and PCR. The antimicrobial susceptibility of all the strains was studied, the genomic relationships among isolates of the same species were determined by PFGE, and the potencial virulence of Y. enterocolitica strains was analyzed. Yersinia species showed higher prevalence (9/453, 2.0%, 95% CI, 0.7–3.3%) than STEC (4/453, 0.9%, 95% CI, 0–1.8%) and Salmonella spp. (3/453, 0.7%, 95% CI, 0–1.5%). Y. enterocolitica and Y. intermedia were isolated from chicken carcasses (6/80, 7.5%, 95% CI, 1.5–13.5%) and porcine skin and bones (3/10, 30%, 95% CI, 0–65%). One STEC strain was recovered from human feces (1/70, 1.4%, 95% CI, 0–4.2%) and STEC stx1/stx2 genes were detected in bovine stools (3/129, 2.3%, 95% CI, 0–5.0%). S. Typhimurium was isolated from human feces (1/70, 1.4%, 95% CI, 0–4.2%) while one S. Newport and two S. Gaminara strains were recovered from one wild boar (1/3, 33%, 95% CI, 0–99%). The knowledge of prevalence and characteristics of these enteropathogens in our region would allow public health services to take adequate preventive measures. PMID:25177351

  20. Exposure to arsenic and lead of children living near a copper-smelter in San Luis Potosi, Mexico: Importance of soil contamination for exposure of children.

    PubMed

    Carrizales, Leticia; Razo, Israel; Téllez-Hernández, Jesús I; Torres-Nerio, Rocío; Torres, Arturo; Batres, Lilia E; Cubillas, Ana-Cristina; Díaz-Barriga, Fernando

    2006-05-01

    The objective of this study was to assess the levels of soil contamination and child exposure in areas next to a primary smelter (arsenic-copper metallurgical) located in the community of Morales in San Luis Potosi, Mexico. In Morales, 90% of the soil samples studied in this work were above 400 mg/kg of lead, and above 100 mg/kg of arsenic, which are guidelines recommended by the United States Environmental Protection Agency (EPA). Bioaccessibility of these metals was studied in vitro in 10 soil samples; the median values of bioaccessibility obtained in these samples were 46.5% and 32.5% for arsenic and lead. Since the concentrations of arsenic and lead in soil were above normal values, and taking into account the bioaccessibility results, exposure to these metals was evaluated in children. Regarding lead, children aged 3-6 years had the highest mean blood lead levels; furthermore, 90% of them had concentrations above 10 microg/dl (CDC's action level). Total urinary arsenic was higher in children aged 8-9 yr; however, the percentage of children with concentrations above 50 microg/g creatinine (CDC's action level) or 100 microg/g creatinine (World Health Organization [WHO] action level) was similar among different age groups. Using the EPAs integrated exposure uptake biokinetic model for lead in children (IEUBK), we estimated that 87% of the total lead in blood is obtained from the soil/dust pathway. The exposure dose to arsenic, estimated for the children living in Morales using Monte Carlo analysis and the arsenic concentrations found in soil, was above the EPA's reference dose. With all these results, it is evident that studies are needed in order to identify adverse health effects in children living in Morales; nevertheless, it is more important to develop a risk reduction program as soon as possible.

  1. Hydrogeology and simulated effects of ground-water development on an unconfined aquifer in the Closed Basin Division, San Luis Valley, Colorado

    USGS Publications Warehouse

    Leonard, G.J.; Watts, K.R.

    1988-01-01

    Wells completed in an unconfined aquifer in the Closed Basin Division of the San Luis Valley Project, Colorado, are expected to provide about 101,800 acre-ft of groundwater/year to the Rio Grande when this project is completed. Lowering of groundwater levels in the unconfined aquifer is expected to decrease the quantity of groundwater that is lost by evapotranspiration. The aquifer system, which consists of an unconfined aquifer that is 50 to 130 ft thick, overlies a thick, leaky confined aquifer. Groundwater moves from the edge of the valley toward a topographic low near the center of the Closed Basin Division, where it is lost by evapotranspiration. A two-dimensional groundwater flow model was used to evaluate the effects of projected withdrawal of about 141 cu ft/sec by 168 wells throughout a 20-year period. The simulated pumpage resulted in a projected drawdown greater than 0.1 ft in the water-levels of the unconfined aquifer over an area of about 370 sq mi. Maximum simulated drawdown was 25 ft. Simulations indicate that about 66 % of the water to be withdrawn from the unconfined aquifer would be derived from decreases of evapotranspiration, 26% from induced leakage from an underlying confined aquifer, and 8% from storage of the unconfined aquifer. Model simulations were based only on withdrawals from wells completed in the unconfined aquifer. Pumpage from the confined aquifer was not simulated. Upward leakage from the confined aquifer predicted by the model, results from the simulated declines of the potentiometric surface in the unconfined aquifer. (USGS)

  2. Geologic Investigation of a Potential Site for a Next-Generation Reactor Neutrino Oscillation Experiment -- Diablo Canyon, San Luis Obispo County, CA

    SciTech Connect

    Onishi, Celia Tiemi; Dobson, Patrick; Nakagawa, Seiji; Glaser, Steven; Galic, Dom

    2004-08-01

    This report provides information on the geology and selected physical and mechanical properties of surface rocks collected at Diablo Canyon, San Luis Obispo County, California as part of the design and engineering studies towards a future reactor neutrino oscillation experiment. The main objective of this neutrino project is to study the process of neutrino flavor transformation--or neutrino oscillation--by measuring neutrinos produced in the fission reactions of a nuclear power plant. Diablo Canyon was selected as a candidate site because it allows the detectors to be situated underground in a tunnel close to the source of neutrinos (i.e., at a distance of several hundred meters from the nuclear power plant) while having suitable topography for shielding against cosmic rays. The detectors have to be located underground to minimize the cosmic ray-related background noise that can mimic the signal of reactor neutrino interactions in the detector. Three Pliocene-Miocene marine sedimentary units dominate the geology of Diablo Canyon: the Pismo Formation, the Monterey Formation, and the Obispo Formation. The area is tectonically active, located east of the active Hosgri Fault and in the southern limb of the northwest trending Pismo Syncline. Most of the potential tunnel for the neutrino detector lies within the Obispo Formation. Review of previous geologic studies, observations from a field visit, and selected physical and mechanical properties of rock samples collected from the site provided baseline geological information used in developing a preliminary estimate for tunneling construction cost. Gamma-ray spectrometric results indicate low levels of radioactivity for uranium, thorium, and potassium. Grain density, bulk density, and porosity values for these rock samples range from 2.37 to 2.86 g/cc, 1.41 to 2.57 g/cc, and 1.94 to 68.5% respectively. Point load, unconfined compressive strength, and ultrasonic velocity tests were conducted to determine rock mechanical

  3. Geologic Investigation of a Potential Site for a Next-Generation Reactor Neutrino Oscillation Experiment -- Diablo Canyon, San Luis Obispo County, CA

    SciTech Connect

    Onishi, Celia Tiemi; Dobson, Patrick; Nakagawa, Seiji; Glaser, Steven; Galic, Dom

    2004-06-11

    This report provides information on the geology and selected physical and mechanical properties of surface rocks collected at Diablo Canyon, San Luis Obispo County, California as part of the design and engineering studies towards a future reactor neutrino oscillation experiment. The main objective of this neutrino project is to study the process of neutrino flavor transformation or neutrino oscillation by measuring neutrinos produced in the fission reactions of a nuclear power plant. Diablo Canyon was selected as a candidate site because it allows the detectors to be situated underground in a tunnel close to the source of neutrinos (i.e., at a distance of several hundred meters from the nuclear power plant) while having suitable topography for shielding against cosmic rays. The detectors have to be located underground to minimize the cosmic ray-related background noise that can mimic the signal of reactor neutrino interactions in the detector. Three Pliocene-Miocene marine sedimentary units dominate the geology of Diablo Canyon: the Pismo Formation, the Monterey Formation, and the Obispo Formation. The area is tectonically active, located east of the active Hosgri Fault and in the southern limb of the northwest trending Pismo Syncline. Most of the potential tunnel for the neutrino detector lies within the Obispo Formation. Review of previous geologic studies, observations from a field visit, and selected physical and mechanical properties of rock samples collected from the site provided baseline geological information used in developing a preliminary estimate for tunneling construction cost. Gamma-ray spectrometric results indicate low levels of radioactivity for uranium, thorium, and potassium. Grain density, bulk density, and porosity values for these rock samples range from 2.37 to 2.86 g/cc, 1.41 to 2.57 g/cc, and 1.94 to 68.5 percent respectively. Point load, unconfined compressive strength, and ultrasonic velocity tests were conducted to determine rock

  4. Time constraints on the Famatinian and Achalian structural evolution of the basement of the Sierra de San Luis (Eastern Sierras Pampeanas, Argentina)

    NASA Astrophysics Data System (ADS)

    Steenken, André; Siegesmund, Siegfried; Wemmer, Klaus; López de Luchi, Mónica G.

    2008-05-01

    Geochronological data pertaining to the structural evolution of the Sierra de San Luis provide important insights into the geodynamic history along the southwestern margin of Gondwana. In the Pringles metamorphic complex, metamorphic fabrics (S 1) were affected by two folding events (D 2 and D 3) related to the Ordovician approach of the Cuyania terrane. Contemporary formations of high-temperature shear zones record a prominent east-side-up displacement. Resumption of compression due to the Achalian collision with the Chilenia terrane was accommodated by the reactivation of the Famatinian high-temperature shear zones in greenschist facies conditions. K-Ar Ms ages point to their activity up to the Early Carboniferous. The post-Pampean structural evolution of the Pringles metamorphic complex is supported by new Sm-Nd and 207Pb/ 206Pb data, which agree with previously proposed early Cambrian sedimentation of the psammopelitic precursors. A Sm-Nd mineral isochron, together with published SHRIMP U-Pb zircon ages, bracket the emplacement of mafic and ultramafic intrusions that control the granulite facies metamorphism between 506 and 478 Ma. A late Cambrian emplacement of the crustal-derived Paso del Rey pluton is suggested by a 207Pb/ 206Pb zircon age at 491 ± 19 Ma. The syn-D 2 emplacement of these granitoids indicates that the D 1 to D 2 structural evolution predates the generally assumed Middle Ordovician accretion of the Precordillera/Cuyania terrane. K-Ar Hbl, Ms, and Bt ages and some Rb-Sr mica data record the cooling after the Famatinian metamorphic peak. Ms ages from large Ms booklets suggest a common cooling of the basement of the sierra at approximately 445 Ma, whereas normal-sized muscovites from gneissic rocks (K-Ar ages of ˜380 Ma) indicate slow cooling of the Pringles metamorphic complex with respect to the other basement domains. K-Ar Bt ages between 360 and 340 Ma capture cooling below approximately 300 °C of the basement. Differential cooling is

  5. Use of InSAR to identify land-surface displacements caused by aquifer-system compaction in the Paso Robles area, San Luis Obispo County, California, March to August 1997

    USGS Publications Warehouse

    Valentine, D.W.; Densmore, J.N.; Galloway, D.L.; Amelung, Falk

    2000-01-01

    The population in San Luis Obispo County has grown steadily during the 1990s, and some land use has been converted from dry farming to grazing to irrigated vineyards and urban areas. Because insufficient surface-water supplies are available to meet the growing demand, ground-water pumpage has increased and the resulting water-level declines have raised concern that this water resource may become overstressed. One particular concern is whether the larger ground-water basins within the county function as large individual basins or whether subsurface structures divide these large basins into smaller subbasins, as differences in ground-water-level data suggest. Interferometric Synthetic Aperture Radar (InSAR) is used in locating land-surface displacement, which may indicate subsurface structures in ground-water basins by determining seasonal and historical land-surface changes. Owing to the high spatial detail of InSAR imagery, the InSAR-derived displacement maps can be used with ground-water-level data to reveal differential aquifer-system compaction related to the presence of geological structures or the distribution of compressible sediments that may define subbasin boundaries. This report describes InSAR displacement maps of the Paso Robles area of San Luis Obispo County and compares them to maps of seasonal changes in ground-water levels to detect the presence of aquifer-system compaction.

  6. Use of InSAR to identify land-surface displacements caused by aquifer-system compaction in the Paso Robles area, San Luis Obispo County, California, March to August 1997

    USGS Publications Warehouse

    Valentine, David W.; Densmore, Jill N.; Galloway, Devin L.; Amelung, Falk

    2001-01-01

    The population in San Luis Obispo County has grown steadily during the 1990s, and some land use has been converted from dry farming to grazing to irrigated vineyards and urban areas. Because insufficient surface-water supplies are available to meet the growing demand, ground-water pumpage has increased and the resulting water-level declines have raised concern that this water resource may become overstressed. One particular concern is whether the larger ground-water basins within the county function as large individual basins or whether subsurface structures divide these large basins into smaller subbasins, as differences in ground-water-level data suggest. Interferometric Synthetic Aperture Radar (InSAR) is used in locating land-surface displacement, which may indicate subsurface structures in ground-water basins by determining seasonal and historical land-surface changes. Owing to the high spatial detail of InSAR imagery, the InSAR-derived displacement maps can be used with ground-water-level data to reveal differential aquifer-system compaction related to the presence of geological structures or the distribution of compressible sediments that may define subbasin boundaries. This report describes InSAR displacement maps of the Paso Robles area of San Luis Obispo County and compares them to maps of seasonal changes in ground-water levels to detect the presence of aquifer-system compaction.

  7. Hydrogeology, water quality, water budgets, and simulated responses to hydrologic changes in Santa Rosa and San Simeon Creek ground-water basins, San Luis Obispo County, California

    USGS Publications Warehouse

    Yates, Eugene B.; Van Konyenburg, Kathryn M.

    1998-01-01

    Santa Rosa and San Simeon Creeks are underlain by thin, narrow ground-water basins that supply nearly all water used for local agricultural and municipal purposes. The creeks discharge to the Pacific Ocean near the northwestern corner of San Luis Obispo County, California. The basins contain heterogeneous, unconsolidated alluvial deposits and are underlain by relatively impermeable bedrock. Both creeks usually stop flowing during the summer dry season, and most of the pumpage during that time is derived from ground-water storage. Annual pumpage increased substantially during 1956?88 and is now a large fraction of basin storage capacity. Consequently, dry-season water levels are lower and the water supply is more vulnerable to drought. The creeks are the largest source of ground-water recharge, and complete basin recharge can occur within the first few weeks of winter streamflow. Agricultural and municipal pumpages are the largest outflows and cause dry-season water-level declines throughout the San Simeon Basin. Pumping effects are more localized in the Santa Rosa Basin because of subsurface flow obstructions. Even without pumpage, a large quantity of water naturally drains out of storage at the upper ends of the basins during the dry season. Ground water is more saline in areas close to the coast than in inland areas. Although seawater intrusion has occurred in the past, it probably was not the cause of high salinity in 1988?89. Ground water is very hard, and concentrations of dissolved solids, chloride, iron, and manganese exceed drinking-water standards in some locations. Probability distributions of streamflow were estimated indirectly from a 120-year rainfall record because the periods of record for local stream-gaging stations were wetter than average. Dry-season durations with recurrence intervals between 5 and 43 years are likely to dry up some wells but not cause seawater intrusion. A winter with no streamflow is likely to occur about every 32 years and to

  8. Maps showing estimated sediment yield from coastal landslides and active slope distribution along the Big Sur coast, Monterey and San Luis Obispo Counties, California

    USGS Publications Warehouse

    Hapke, Cheryl J.; Green, Krystal R.; Dallas, Kate

    2004-01-01

    The 1982-83 and 1997-98 El Ni?os brought very high precipitation to California?s central coast; this precipitation resulted in raised groundwater levels, coastal flooding, and destabilized slopes throughout the region. Large landslides in the coastal mountains of Big Sur in Monterey and San Luis Obispo Counties blocked sections of California State Route 1, closing the road for months at a time. Large landslides such as these occur frequently in the winter months along the Big Sur coast due to the steep topography and weak bedrock. A large landslide in 1983 resulted in the closure of Highway 1 for over a year to repair the road and stabilize the slope. Resulting work from the 1983 landslide cost over $7 million and generated 30 million cubic yards of debris from landslide removal and excavations to re-establish the highway along the Big Sur coast. Before establishment of the Monterey Bay National Marine Sanctuary (MBNMS) in 1992, typical road opening measures involved disposal of some landslide material and excess material generated from slope stabilization onto the seaward side of the highway. It is likely that some or most of this disposed material, either directly or indirectly through subsequent erosion, was eventually transported downslope into the ocean. In addition to the landslides that initiate above the road, natural slope failures sometimes occur on the steep slopes below the road and thus deliver material to the base of the coastal mountains where it is eroded and dispersed by waves and nearshore currents. Any coastal-slope landslide, generated through natural or anthropogenic processes, can result in sediment entering the nearshore zone. The waters offshore of the Big Sur coast are part of the MBNMS. Since it was established in 1992, landslide-disposal practices came under question for two reasons. The U.S. Code of Federal Regulations, Title 15, Section 922.132 prohibits discharging or depositing, from beyond the boundary of the Sanctuary, any material

  9. Geochemistry and petrology of spinel lherzolite xenoliths from Xalapasco de La Joya, San Luis Potosi, Mexico: Partial melting and mantle metasomatism

    NASA Astrophysics Data System (ADS)

    Liang, Yan; Elthon, Don

    1990-09-01

    Spinel Iherzolite xenoliths from Xalapasco de La Joya, San Luis Potosi, Mexico, are divided into two distinct groups according to their major element and trace element characteristics. Group Ia xenoliths are characterized by light rare earth element (LREE) depletion ((La/Lu)N = 0.10-0.77 in clinopyroxene) and linear major and compatible trace element relationships. Group Ib xenoliths are characterized by FeO and Na2O enrichment and higher (La/Lu)N ratios (0.80-4.1 in clinopyroxene) and complex major element relationships. These samples, which have a range of equilibrium temperatures of 910°-1070°C, exhibit protogranular textures and typical orthopyroxene+clinopyroxene+spinel clusters. Modal abundances and chemical compositions of the group Ia xenoliths vary from primitive (15.2% clinopyroxene, 38.5% MgO, 1824 ppm Ni) to moderately depleted (6.4-8.7% clinopyroxene, 43.8-44.1% MgO, 2192 ppm Ni). Systematic variations of major elements and compatible trace elements in the group Ia xenoliths are interpreted to result from various degrees (<25%) of partial melting and melt extraction, followed by subsolidus equilibration and annealing. The extracted melts have a range of compositions similar to picritic basalts. Abundances of moderately incompatible trace elements, Sc and Cr, in the group Ia minerals have been substantially redistributed during subsolidus equilibration. In a few of these xenoliths there appears to be vestiges of incipient metasomatism, but metasomatism has not substantially influenced the group as a whole. Group Ib xenoliths have been substantially influenced by metasomatic processes. The ∑FeO and Na2O contents of the cores of clinopyroxenes in group Ib xenoliths are higher than clinopyroxenes in group Ia samples. The higher La contents and La/Lu ratios in group Ib clinopyroxenes (compared to group Ia), together with this FeO and Na2O enrichment, suggest that equilibration of basanites with residual mantle has been a major process in the evolution

  10. [Seroprevalence, clinical and biochemical data of dogs naturally infected by Leishmania and phlebotominae sandfly fauna in an endemic area in São Luis Island, Maranhão State, Brazil].

    PubMed

    Abreu-Silva, Ana Lúcia; Lima, Tiago B; De Macedo, Auricélio A; Moraes-Júnior, Felipe De Jesus; Dias, Elaine L; Batista, Zulmira Da S; Calabrese, Katia Da S; Moraes, Jorge Luiz P; Rebêlo, José Manuel M; Guerra, Rita Maria S N De C

    2008-09-01

    The aim of this study was to determine the seroprevalence, clinical and biochemical profile of Leishmania chagasi infection in dogs naturally infected and identify the phlebotominae fauna in an endemic area of São Luis Island. In this present study, 62 household mongrel dogs were sampled for antibodies anti-Leishmania. The seroprevalence was 51.61%. In the clinical evaluation, 36.68% dogs were symptomatic, 38.41% were oligosymptomatic and 26.13% were asymptomatic. The most frequent signs were onychogryphosis and lymphadenomegaly. In 29.41% animals were observed anemia. In the biochemical analysis hepatic function showed changes in relation to alaninoaminotransferase (ALT) and aspartato aminotransferase (AST). Urea values were higher than the references ones for canine specie. The following phlebotominae sandflies were identified: Lutzomyia longipalpis (86.9%), L. evandroi (9.6%), L. choti (2.1%), L. umbratilis (0.7%) e L. whitmani (0.7%).

  11. Pre- and postnatal findings in a patient with a novel rec(8)dup(8q)inv(8)(p23.2q22.3) associated with San Luis Valley syndrome.

    PubMed

    Vera-Carbonell, Ascensión; López-González, Vanesa; Bafalliu, Juan Antonio; Piñero-Fernández, Juan; Susmozas, Joaquín; Sorli, Moisés; López-Pérez, Rocío; Fernández, Asunción; Guillén-Navarro, Encarna; López-Expósito, Isabel

    2013-09-01

    San Luis Valley syndrome, which is due to a recombinant chromosome 8 (SLV Rec8) found in Hispanic individuals from Southwestern United States, is a well-established syndrome associated with intellectual disabilities and, frequently, severe cardiac anomalies. We report for the first time on a Moroccan girl with a recombinant chromosome 8 prenatally diagnosed as SLV Rec8 by conventional cytogenetic studies. At birth, an oligo array-CGH (105 K) defined the breakpoints and the size of the imbalanced segments, with a deletion of ≈ 2.27 Mb (8p23.2-pter) and a duplication of ≈ 41.93 Mb (8q22.3-qter); thus this recombinant chromosome 8 differed from that previously reported in SLV Rec8 syndrome. The phenotypic characteristics associated with this SLV Rec8 genotype overlap those commonly found in patients with 8q duplication reported in the literature. We review SLV Rec8 and other chromosome 8 aberrations and suggest that the overexpression of cardiogenic genes located at 8q may be the cause of the cardiac defects in this patient.

  12. First isolation and genotyping of Toxoplasma gondii from free-range chickens on São Luis island, Maranhão state, Brazil, with a new genotype described.

    PubMed

    Sousa, I C; Pena, H F J; Santos, L S; Gennari, S M; Costa, F N

    2016-06-15

    Toxoplasma gondii is a protozoan with worldwide distribution that infects warm-blooded vertebrates, including humans. Toxoplasma is considered to be monospecific, but three classical clonal lineages (Types I-III) have been described, especially for isolates from North America and Europe. However, recently, several studies have shown that many isolates, particularly from South America, are different from the classic types and highly diverse, with the presence of specific clonal lineages and non-archetypal genotypes. In order to isolate and genotypically characterize T. gondii, 60 free-range naturally infected chickens (Gallus domesticus) from four municipalities on São Luis island, state of Maranhão, Brazil, were first serologically screened for IgG anti-T. gondii antibodies by means of the immunofluorescent antibody test (IFAT≥1:16). Heart and brain samples from seropositive chickens were bioassayed in mice. The isolates obtained from bioassaying were genotyped by means of PCR-RFLP (restriction fragment length polymorphism) using 11 markers and by microsatellites (MS) using 15 markers. The frequency of anti-T. gondii antibodies in the chickens examined was 25.0% (15/60). Five isolates of T. gondii were obtained and named TgCkBrMA1 to 5. Four genotypes were described. One of them is reported for the first time. No classic clonal lineages of types I, II or III were found, but the Brazilian clonal lineage BrI was identified. MS analysis revealed five genotypes. The results corroborate studies already developed in other regions of Brazil, thus indicating that T. gondii has high genetic diversity in Brazil.

  13. Potential Human Health Risk by Metal(loid)s, 234,238U and 210Po due to Consumption of Fish from the “Luis L. Leon” Reservoir (Northern México)

    PubMed Central

    Luna-Porres, Mayra Y.; Rodríguez-Villa, Marco A.; Herrera-Peraza, Eduardo F.; Renteria-Villalobos, Marusia; Montero-Cabrera, María E.

    2014-01-01

    Concentrations of As, Cu, Fe, Hg, Pb and Zn and activity concentrations from 234,238U and 210Po in water, fillet, liver and gills were determined in three stocked fish species from the Luis L. Leon reservoir, located in Northern Mexico. The considered species were Lepomis cyanellus, Cyprinus carpio and Ictalurus furcatus. 238U and 234U activity concentration (AC) in fillet samples showed values of 0.007–0.014 and 0.01–0.02 Bq∙kg−1 wet weight (ww), respectively. Liver samples for L. cyanellus, C. carpio and I. furcatus present 210Po AC of 1.16–3.26, 0.70–1.13 and 0.93–1.37 Bq∙kg−1 ww. Arsenic, mercury and lead concentration intervals in fillet samples were 0.13–0.39, 0.005–0.126 and 0.009–0.08 mg∙kg−1 ww, respectively, while in gill samples they were 0.11–0.43, 0.002–0.039 and 0.02–0.26 mg∙kg−1 ww. The elemental Bioaccumulation Factor (BAF) for fish tissues with respect to their concentrations in water was determined. L. cyanellus showed the highest BAF values for As and total U, being BAFAs = 37 and 40 L∙kg−1 in fillet and gills, respectively, and BAFU total = 1.5 L∙kg−1 in fillet. I. furcatus showed the highest BAF values for Hg and Pb, being BAFHg = 40 and 13 L∙kg−1 in fillet and gills, and BAFPb = 6.5 and 22 L∙kg−1 in fillet and gills, respectively. Some metal(loid) concentrations are slightly higher than European regulations for fish fillets. The difference in concentrations of metal(loid)s in fillet among the studied species is probably due to their differences in diet and habitat. PMID:24968208

  14. PRELIMINARY PALEOMAGNETIC RESULTS FROM OUTFLOW EOCENE-OLIGOCENE ASH FLOW TUFFS FROM THE WESTERN MARGIN OF THE SAN LUIS BASIN: IMPLICATION FOR THE KINEMATIC EVOLUTION OF THE RIO GRANDE RIFT

    NASA Astrophysics Data System (ADS)

    Mason, S. N.; Geissman, J. W.; Sussman, A. J.

    2009-12-01

    In the Rio Grande rift (RGR), a late Cenozoic continental rift from central Colorado to southern New Mexico, hanging wall margins typically contain en echelon normal fault systems with intervening areas of typically complex structure, called relay zones. Relay zones transfer displacement through complex strain patterns and eventual linkage of faults and hold clues as to how fault zones initiate and grow. The western margin of the RGR at the latitude of the San Luis basin (SLB) exposes laterally continuous Eocene-Oligocene volcanic rocks, well-correlated by 40Ar/39Ar data, and well-preserved rift structures. Ash flow tuffs are usually excellent recorders of the instantaneous geomagnetic field and five ash flow tuffs (ca. 32.3 to 27.3 Ma; including the Saguache Creek, La Jara Canyon, Masonic Park, Fish Canyon, and Carpenter Ridge tuffs) have been sampled in spatial detail along west to east transects of the eastern San Juan volcanic field to the westernmost margin of the RGR at the SLB. Data obtained from our sampling approach will yield a comprehensive definition of relative vertical-axis rotations across the area and will be used to assess the timing of RGR fault linkages. Preliminary paleomagnetic data from the Masonic Park tuff (ca. 28.2 Ma) suggest up to ~17° clockwise rotation between sample locations on the Colorado Plateau and locations to the east, nearest the western margin of the RGR. Preliminary data from the Fish Canyon tuff (ca. 27.8 Ma) show a ~12° clockwise rotation. The relative clockwise vertical-axis rotation of sampling sites in both ash flow tuffs nearest the RGR margin suggests that relay zone development with attending vertical-axis rotation played an important role in the opening of the northern RGR. Our data set is not sufficiently robust at present to test the hypothesis that rotation was taking place concurrently with eruption of these large-volume ash flow tuffs in the early Oligocene, but it is a possibility and if so, the RGR at the

  15. Sustainability Metrics: The San Luis Basin Project

    EPA Science Inventory

    Sustainability is about promoting humanly desirable dynamic regimes of the environment. Metrics: ecological footprint, net regional product, exergy, emergy, and Fisher Information. Adaptive management: (1) metrics assess problem, (2) specific problem identified, and (3) managemen...

  16. Exposure to chemical mixtures in Mexican children: high-risk scenarios.

    PubMed

    Domínguez-Cortinas, Gabriela; Díaz-Barriga, Fernando; Martínez-Salinas, Rebeca Isabel; Cossío, Patricia; Pérez-Maldonado, Iván Nelinho

    2013-01-01

    In developing countries, the management of environmental toxicants is inadequate, thus, humans may be exposed to levels higher than normal levels (background levels). Therefore, the aim of this study was to evaluate the exposure level of Mexican children to dichlorodiphenyltrichloroethane (DDT), dichlorodiphenyldichloroethylene (DDE), lead, and polycyclic aromatic hydrocarbons [using 1-hydroxypyrene (1-OHP) as exposure biomarker] and to assess the percentage of children exposed to these four compounds at concentrations higher than normal in each community studied. We performed random sampling in eight communities in Mexico (five communities in Chiapas State and three communities in San Luis Potosi State). DDT and DDE were analyzed by gas chromatography/mass spectrometry, the quantification of lead in blood was performed using atomic absorption spectrophotometry, and 1-OHP analyses were performed using HPLC with a fluorescence detector. Elevated DDT, DDE, and 1-OHP levels were found in children living in the indigenous communities of Chiapas State, while higher blood lead levels were found in two communities in San Luis Potosí. Approximately 30 % of children living in Chiapas were exposed to all four compounds at concentrations above the guidelines for each compound, whereas 48 % of children studied were exposed to all four contaminants at concentrations higher than normal in a community in San Luis Potosí State. As expected, our results showed that in hot spots, children are exposed to levels higher than normal. Therefore, child environmental health programs are urgently needed.

  17. Photoperiod in three xanthium populations from the tropic of cancer in Mexico.

    PubMed

    McMillan, C

    1969-07-18

    Diverse photoperiodic responses were shown by three populations of Xanthium strumarium L. originating between 22 degrees and 25 degrees N on the western coast near Culiacán, Sinaloa; in the Chihuahuan Desert near Matehuala, San Luis Potoś; and on the Gulf Coast near Ciudad Mante, Tamaulipas, respectively. A combination of differences in critical night length and in ripeness-to-flower response (maturity) appears to be the basis for reproductive adaptation of these populations to different climatic regimes that prevail at the same latitude (and photoperiodic regime).

  18. Prediabetes in rural and urban children in 3 states in Mexico.

    PubMed

    Aradillas-García, Celia; Malacara, Juan M; Garay-Sevilla, Ma Eugenia; Guízar, Juan M; Camacho, Nicolás; De la Cruz-Mendoza, Esperanza; Quemada, Leticia; Sierra, Juan Francisco Hernández

    2007-01-01

    The authors studied the frequency, distribution, and factors associated with prediabetes (fasting glucose, 100-125 mg/dL) in rural and urban children from San Luis Potosí, León, and Querétaro in central Mexico. Family history, somatometry, and levels of fasting insulin, glucose, and lipids were collected in 1238 children 6 to 13 years of age. The authors found no cases of type 2 diabetes and a 5.7% frequency of prediabetes. The group with prediabetes had higher homeostasis model assessment of insulin resistance scores and total cholesterol and high-density lipoprotein cholesterol levels. Prediabetes was more frequent in León, with similar distribution in rural and urban children. The frequency of insulin resistance was 24.1%, with higher figures in urban groups and in San Luis Potosí. In multivariate analysis, prediabetes was associated with insulin resistance and residence in León. The authors concluded that in central Mexico the frequency of prediabetes is significant, and it is associated with insulin resistance and a geographic location, but not with obesity or urban vs rural dwelling.

  19. Regional Sustainability: The San Luis Basin Metrics Project

    EPA Science Inventory

    There are a number of established, scientifically supported metrics of sustainability. Many of the metrics are data intensive and require extensive effort to collect data and compute. Moreover, individual metrics may not capture all aspects of a system that are relevant to sust...

  20. Sun Spot One (SS1): San Luis Valley, Colorado (Data)

    DOE Data Explorer

    Stoffel, T.; Andreas, A.

    2008-06-10

    A partnership with industry and U.S. Department of Energy's National Renewable Energy Laboratory (NREL) to collect solar data to support future solar power generation in the United States. The measurement station monitors global horizontal, direct normal, and diffuse horizontal irradiance to define the amount of solar energy that hits this particular location. The solar measurement instrumentation is also accompanied by meteorological monitoring equipment to provide scientists with a complete picture of the solar power possibilities.

  1. Geothermal energy potential in the San Luis Valley, Colorado

    SciTech Connect

    Coe, B.A.

    1980-01-01

    The background of the area itself is investigated considering the geography, population, economy, attitudes of residents, and energy demands of the area. The requirements for geothermal energy development are considered, including socio-economic, institutional, and environmental conditions as well as some technical aspects. The current, proposed, and potential geothermal energy developments are described. The summary, conclusions, and methodology are included. (MHR)

  2. "Ficciones," Jorge Luis Borges. Performance Guides to Spanish Texts.

    ERIC Educational Resources Information Center

    Gies, David Thatcher, Comp.

    This performance guide is the result of work conducted at the University of Virginia's National Endowment for the Humanities Summer Institute, 1989, on "Spanish Literature in Performance," in which 25 secondary school Spanish teachers studied Spanish texts from the perspective of classroom performance to deepen knowledge of the texts and discover…

  3. Congenital cytomegalovirus infection in San Luis Potosi, Mexico.

    PubMed

    Noyola, Daniel E; Mejía-Elizondo, Ana R; Canseco-Lima, Jesús M; Allende-Carrera, Ricardo; Hernánsez-Salinas, Alba E; Ramírez-Zacarías, José L

    2003-01-01

    The incidence of congenital cytomegalovirus infection in Mexico is unknown. We evaluated the presence of cytomegalovirus infection in 560 newborn infants at a public general hospital. There were five (0.89%) infected newborns. Infants with congenital infection were more likely to be born to primigravid mothers (P = 0.01) and were more often from rural areas (P = 0.058) than were noninfected newborns.

  4. Elevated cadmium concentrations in potato tubers due to irrigation with river water contaminated by mining in Potosí, Bolivia.

    PubMed

    Oporto, Carla; Vandecasteele, Carlo; Smolders, Erik

    2007-01-01

    Risk of cadmium (Cd) in the human food chain in Cd-contaminated areas is often limited by phytotoxicity from zinc (Zn) that is associated with the Cd contamination. A semiarid area, 60 km downstream of a tin mine in Bolivia, was surveyed where irrigation with Cd-contaminated river water (65-240 microg Cd L(-1)) has increased median soil Cd to 20 mg kg(-1) while median soil Zn was only about 260 mg kg(-1). Cadmium concentrations in potato tubers increased from background values (0.05 mg kg(-1) dry wt.) in soils irrigated with spring water to a median value of 1.2 mg kg(-1) dry wt. in the affected area. Median concentration of Cd in soil solutions was 27 microg L(-1) and exceeded the corresponding value of Zn almost twofold. Soil-extractable chloride ranged from 40 to 1600 mg Cl(-) kg(-1) and was positively correlated with soil total Cd. Increasing soil solution Cl(-) decreased the solid-liquid distribution coefficient of Cd in soil. Soil total Cd explained 64% of the variation of tuber Cd concentration while only 3% of the variation was explained by soil extractable Cl(-) (n = 49). The estimated dietary Cd intake from potato consumption by the local population is about 100 microg d(-1) which exceeds the WHO recommended total daily intake. It is concluded that the food chain risk of Cd in the irrigation water of the semiarid area is aggravated by the association with Cl(-) and, potentially, by the relatively large Cd/Zn ratio. PMID:17596627

  5. Mollusks of the Upper Jurassic (upper Oxfordian-lower Kimmeridgian) shallow marine Minas Viejas Formation, northeastern Mexico

    NASA Astrophysics Data System (ADS)

    Zell, Patrick; Beckmann, Seija; Stinnesbeck, Wolfgang; Götte, Martin

    2015-10-01

    We present the first systematic description of Late Jurassic (late Oxfordian-early Kimmeridgian) invertebrates from the shallow marine Minas Viejas Formation of northeastern Mexico. The unit was generally considered to be extremely poor in fossils, due to an overall evaporitic character. The collection described here includes three taxa of ammonites, 10 taxa of bivalves and five taxa of gastropods. The fossils were discovered near Galeana and other localities in southern Nuevo León and northeastern San Luis Potosí, in thin-bedded marly limestones intercalated between gypsum units. Due to complex internal deformation of the sediments, fossils used for this study cannot be assigned to precise layers of origin. However, the taxa identified suggest a Late Jurassic (late Oxfordian-early Kimmeridgian) age for these fossil-bearing layers and allow us, for the first time, to assign a biostratigraphic age to Upper Jurassic strata in the region underlying the La Caja and La Casita formations.

  6. Spatial configuration of land-use/land-cover in the Pujal-Coy project area, Huasteca Potosina region, Mexico.

    PubMed

    Reyes Hernández, Humberto; Aguilar Robledo, Miguel; Aguirre Rivera, Juan Rogelio; Fortanelli Martínez, Javier

    2008-07-01

    This article analyzes the relationship between the configuration and spatial reorganization of land-use and land-cover in the Pujal-Coy project area, Huasteca Potosina region, eastern San Luis Potosí, Mexico, as well as the relationship between these changes and the environmental conditions prevailing in the area. Land-use and land-cover changes were determined through the analysis and interpretation of satellite images from different dates. The changes identified in the different study periods were correlated with the prevailing physical factors. The results show that the spatial configuration of farming activities, initially induced by the implementation of a regional development project, is highly correlated to the presence of limiting factors such as soil type, slope, and climate. Particularly, the former represents the element that has led to the establishment of the current distribution pattern of farming activities.

  7. Arsenic and fluoride in the groundwater of Mexico.

    PubMed

    Armienta, M A; Segovia, N

    2008-08-01

    Concentrations of arsenic and fluoride above Mexican drinking water standards have been detected in aquifers of various areas of Mexico. This contamination has been found to be mainly caused by natural sources. However, the specific processes releasing these toxic elements into groundwater have been determined in a few zones only. Many studies, focused on arsenic-related health effects, have been performed at Comarca Lagunera in northern México. High concentrations of fluoride in water were also found in this area. The origin of the arsenic there is still controversial. Groundwater in active mining areas has been polluted by both natural and anthropogenic sources. Arsenic-rich minerals contaminate the fractured limestone aquifer at Zimapán, Central México. Tailings and deposits smelter-rich fumes polluted the shallow granular aquifer. Arsenic contamination has also been reported in the San Antonio-El Triunfo mining zone, southern Baja California, and Santa María de la Paz, in San Luis Potosí state. Even in the absence of mining activities, hydrogeochemistry and statistical techniques showed that arsenopyrite oxidation may also contaminate water, as in the case of the Independencia aquifer in the Mexican Altiplano. High concentrations of arsenic have also been detected in geothermal areas like Los Azufres, Los Humeros, and Acoculco. Prevalence of dental fluorosis was revealed by epidemiological studies in Aguascalientes and San Luis Potosí states. Presence of fluoride in water results from dissolution of acid-volcanic rocks. In Mexico, groundwater supplies most drinking water. Current knowledge and the geology of Mexico indicate the need to include arsenic and fluoride determinations in groundwater on a routine basis, and to develop interdisciplinary studies to assess the contaminant's sources in all enriched areas.

  8. An Emergy Systems View of Sustainability: Emergy Evaluation of the San Luis Basin, Colorado

    EPA Science Inventory

    Energy Systems Theory (EST) was used to provide a context for understanding and interpreting sustainability. We propose that “what is sustainable” for a system at any given level of organization is determined by the cycles of change originating in the next larger system. Furtherm...

  9. 75 FR 49022 - San Luis & Rio Grande Railroad-Petition for a Declaratory Order

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-08-12

    ... otherwise apply to SLRG's proposed operation of a containerized truck-to-rail solid waste transload facility... is ``government-generated dirt'' as opposed to industrial waste. Under 5 U.S.C. 554(e), the Board...

  10. Evaluation of Skylab photography for water resources, San Luis Valley, Colorado

    NASA Technical Reports Server (NTRS)

    Lee, K. (Principal Investigator); Huntley, D.

    1975-01-01

    The author has identified the following significant results. Skylab S190A photography used in a stereo mode is sufficient for defining the drainage divides and drainage patterns at the regional level. This data, combined with geologic information, define the boundaries and distribution of ground water recharge and discharge areas within the basin.

  11. Making the Transition to the SuperCatalog: ISU's Experience with LUIS II.

    ERIC Educational Resources Information Center

    Davis, H. Scott; Ensor, Patricia L.

    1991-01-01

    Describes the development at Indiana State University of a SuperCatalog, a computerized library catalog that provides access to both library holdings and locally loaded commercial databases, including ERIC and Wilson indexes. Software is discussed; the impact on staff, users, interlibrary loan, and library instruction is examined; and future…

  12. Effect of Mining Activities in Biotic Communities of Villa de la Paz, San Luis Potosi, Mexico

    PubMed Central

    Espinosa-Reyes, Guillermo; González-Mille, Donaji J.; Ilizaliturri-Hernández, César A.; Mejía-Saavedra, Jesús; Cilia-López, V. Gabriela; Costilla-Salazar, Rogelio; Díaz-Barriga, Fernando

    2014-01-01

    Mining is one of the most important industrial activities worldwide. During its different stages numerous impacts are generated to the environment. The activities in the region have generated a great amount of mining residues, which have caused severe pollution and health effects in both human population and biotic components. The aim of this paper was to assess the impact of mining activities on biotic communities within the district of Villa de la Paz. The results showed that the concentrations of As and Pb in soil were higher than the national regulations for urban or agricultural areas. The bioavailability of these metals was certified by the presence of them in the roots of species of plants and in kidneys and livers of wild rodents. In regard to the community analysis, the sites that were located close to the mining district of Villa de la Paz registered a lower biological diversity, in both plants and wild rodents, aside from showing a change in the species composition of plant communities. The results of this study are evidence of the impact of mining on biotic communities, and the need to take into account the wildlife in the assessment of contaminated sites. PMID:24592381

  13. Presence of enterotoxigenic Staphylococcus aureus in artisan fruit salads in the city of San Luis, Argentina.

    PubMed

    Estrada, Cecilia S M Lucero; Alcaráz, Lucia E; Satorres, Sara E; Manfredi, Eduardo; Velázquez, Lidia Del C

    2013-12-01

    An increase in the consumption of fruit juices and minimally processed fruits salads has been observed in recent years all over the world. In this work, the microbiological quality of artisan fruit salads was analysed. Faecal coliforms, Salmonella spp, Shigella spp, Yersinia enterocolitica and Escherichia coli O157:H7 were not detected; nevertheless, eleven strains of Staphylococcus aureus were isolated. By multiplex PCR, all isolates showed positive results for S. aureus 16S rRNA gene and 63.6% of them were positive for sea gene. Furthermore, PCR sea positive strains were able to produce the corresponding enterotoxin. Finally, the inactivation of these strains in fruit salads by nisin, lysozyme and EDTA, was studied. EDTA produced a total S. aureus growth inhibition after 60 h of incubation at a concentration of 250 mg/L. The presence of S. aureus might indicate inadequate hygiene conditions during salad elaboration; however, the enterotoxigenicity of the strains isolated in this study, highlights the risk of consumers' intoxication. EDTA could be used to inhibit the growth of S. aureus in artisan fruit salads and extend the shelf life of these products. PMID:24688505

  14. An energy systems view of sustainability: emergy analysis of the San Luis Basin, Colorado

    EPA Science Inventory

    Energy Systems Theory (EST) is used to provide a context for understanding and interpreting sustainability. We propose that “what is sustainable” for a system at any given level of organization is determined by the cycles of change originating in the next larger system. Further...

  15. 75 FR 59285 - Endangered and Threatened Wildlife and Plants; Permit, San Luis Obispo County, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-27

    ... and Wildlife Service as endangered on December 15, 1994 (59 FR 64613). Section 9 of the Act (16 U.S.C...-3958. FOR FURTHER INFORMATION CONTACT: Julie M. Vanderwier, Fish and Wildlife Biologist, or Jen...

  16. 75 FR 8735 - Endangered and Threatened Wildlife and Plants; Permit, San Luis Obispo County, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-25

    ... shoulderband snail was listed as endangered on December 15, 1994 (59 FR 64613). Section 9 of the Act (16 U.S.C... to (805) 644-3958. FOR FURTHER INFORMATION CONTACT: Jen Lechuga, HCP Coordinator, at Ventura...

  17. San Luis Basin Sustainability Metrics Project: A Methodology for Evaluating Regional Sustainability

    EPA Science Inventory

    Although there are several scientifically-based sustainability metrics, many are data intensive, difficult to calculate, and fail to capture all aspects of a system. To address these issues, we produced a scientifically-defensible, but straightforward and inexpensive, methodolog...

  18. Presence of enterotoxigenic Staphylococcus aureus in artisan fruit salads in the city of San Luis, Argentina

    PubMed Central

    Estrada, Cecilia S.M. Lucero; Alcaráz, Lucia E.; Satorres, Sara E.; Manfredi, Eduardo; Velázquez, Lidia del C.

    2013-01-01

    An increase in the consumption of fruit juices and minimally processed fruits salads has been observed in recent years all over the world. In this work, the microbiological quality of artisan fruit salads was analysed. Faecal coliforms, Salmonella spp, Shigella spp, Yersinia enterocolitica and Escherichia coli O157:H7 were not detected; nevertheless, eleven strains of Staphylococcus aureus were isolated. By multiplex PCR, all isolates showed positive results for S. aureus 16S rRNA gene and 63.6% of them were positive for sea gene. Furthermore, PCR sea positive strains were able to produce the corresponding enterotoxin. Finally, the inactivation of these strains in fruit salads by nisin, lysozyme and EDTA, was studied. EDTA produced a total S. aureus growth inhibition after 60 h of incubation at a concentration of 250 mg/L. The presence of S. aureus might indicate inadequate hygiene conditions during salad elaboration; however, the enterotoxigenicity of the strains isolated in this study, highlights the risk of consumers’ intoxication. EDTA could be used to inhibit the growth of S. aureus in artisan fruit salads and extend the shelf life of these products. PMID:24688505

  19. Effect of mining activities in biotic communities of Villa de la Paz, San Luis Potosi, Mexico.

    PubMed

    Espinosa-Reyes, Guillermo; González-Mille, Donaji J; Ilizaliturri-Hernández, César A; Mejía-Saavedra, Jesús; Cilia-López, V Gabriela; Costilla-Salazar, Rogelio; Díaz-Barriga, Fernando

    2014-01-01

    Mining is one of the most important industrial activities worldwide. During its different stages numerous impacts are generated to the environment. The activities in the region have generated a great amount of mining residues, which have caused severe pollution and health effects in both human population and biotic components. The aim of this paper was to assess the impact of mining activities on biotic communities within the district of Villa de la Paz. The results showed that the concentrations of As and Pb in soil were higher than the national regulations for urban or agricultural areas. The bioavailability of these metals was certified by the presence of them in the roots of species of plants and in kidneys and livers of wild rodents. In regard to the community analysis, the sites that were located close to the mining district of Villa de la Paz registered a lower biological diversity, in both plants and wild rodents, aside from showing a change in the species composition of plant communities. The results of this study are evidence of the impact of mining on biotic communities, and the need to take into account the wildlife in the assessment of contaminated sites.

  20. A Report on the System of Radioprimaria in the State of San Luis Potosi, Mexico.

    ERIC Educational Resources Information Center

    Spain, Peter L.

    A project called "radioprimaria" is bringing classes by radio to fourth, fifth, and sixth grades in a rural area of Mexico to make up for the lack of teachers in these grades. Even though the project was largely unsupervised and plagued with disorganization and equipment problems, children taught with radio did as well as children in the…

  1. Magnetic map of the Irish Hills and surrounding areas, San Luis Obispo County, central California

    USGS Publications Warehouse

    Langenheim, V.E.; Watt, J.T.; Denton, K.M.

    2012-01-01

    A magnetic map of the Irish Hills and surrounding areas was created as part of a cooperative research and development agreement with the Pacific Gas and Electric Company and is intended to promote further understanding of the areal geology and structure by serving as a basis for geophysical interpretations and by supporting geological mapping, mineral and water resource investigations, and other topical studies. Local spatial variations in the Earth's magnetic field (evident as anomalies on magnetic maps) reflect the distribution of magnetic minerals, primarily magnetite, in the underlying rocks. In many cases the volume content of magnetic minerals can be related to rock type, and abrupt spatial changes in the amount of magnetic minerals can be related to either lithologic or structural boundaries. Magnetic susceptibility measurements from the area indicate that bodies of serpentinite and other mafic and ultramafic rocks tend to produce the most intense magnetic anomalies, but such generalizations must be applied with caution because some sedimentary units also can produce measurable magnetic anomalies. Remanent magnetization does not appear to be a significant source for magnetic anomalies because it is an order of magnitude less than the induced magnetization. The map is a mosaic of three separate surveys collected by (1) fixed-wing aircraft at a nominal height of 305 m, (2) by boat with the sensor at sea level, and (3) by helicopter. The helicopter survey was flown by New-Sense Geophysics in October 2009 along flight lines spaced 150-m apart and at a nominal terrain clearance of 50 to 100 m. Tie lines were flown 1,500-m apart. Data were adjusted for lag error and diurnal field variations. Further processing included microleveling using the tie lines and subtraction of the reference field defined by International Geomagnetic Reference Field (IGRF) 2005 extrapolated to August 1, 2008.

  2. Effect of climatological factors on respiratory syncytial virus epidemics.

    PubMed

    Noyola, D E; Mandeville, P B

    2008-10-01

    Respiratory syncytial virus (RSV) presents as yearly epidemics in temperate climates. We analysed the association of atmospheric conditions to RSV epidemics in San Luis Potosí, S.L.P., Mexico. The weekly number of RSV detections from October 2002 and May 2006 were correlated to ambient temperature, barometric pressure, relative humidity, vapour tension, dew point, precipitation, and hours of light using time-series and regression analyses. Of the variation in RSV cases, 49.8% was explained by the study variables. Of the explained variation in RSV cases, 32.5% was explained by the study week and 17.3% was explained by meteorological variables (average daily temperature, maximum daily temperature, temperature at 08:00 hours, and relative humidity at 08:00 hours). We concluded that atmospheric conditions, particularly temperature, partly explain the year to year variability in RSV activity. Identification of additional factors that affect RSV seasonality may help develop a model to predict the onset of RSV epidemics. PMID:18177520

  3. Apoptosis of peripheral blood mononuclear cells in children exposed to arsenic and fluoride.

    PubMed

    Rocha-Amador, Diana O; Calderón, Jaqueline; Carrizales, Leticia; Costilla-Salazar, Rogelio; Pérez-Maldonado, Iván Nelinho

    2011-11-01

    In this study, we evaluated apoptosis induction in human immune cells in children exposed to arsenic (As) and fluoride (F). Children living in two areas in Mexico (Soledad de Graciano Sanchez (SGS) in San Luis Potosí and Colonia 5 de Febrero in Durango) were studied. Water, urine and blood samples were collected. Approximately 90% of the water samples in 5 de Febrero had As and F levels above the World Health Organization intervention guideline (10 μg/L and 1.5mg/L, respectively). In SGS, 0% of the water samples exceeded Mexican guidelines. Urinary As and F levels in children living in 5 de Febrero were significantly higher than the levels found in children living in SGS. In addition, the level of apoptosis was higher in children from the 5 de Febrero community when compared with the level of apoptosis in children living in SGS. Thus, in a worldwide context, our study demonstrates the health risks to children living in these regions. PMID:22004959

  4. 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

  5. The etiology of maternal mortality in developing countries: what do verbal autopsies tell us?

    PubMed Central

    Sloan, N. L.; Langer, A.; Hernandez, B.; Romero, M.; Winikoff, B.

    2001-01-01

    OBJECTIVE: To reassess the practical value of verbal autopsy data, which, in the absence of more definitive information, have been used to describe the causes of maternal mortality and to identify priorities in programmes intended to save women's lives in developing countries. METHODS: We reanalysed verbal autopsy data from a study of 145 maternal deaths that occurred in Guerrero, Querétaro and San Luis Potosí, Mexico, in 1995, taking into account other causes of death and the WHO classification system. The results were also compared with information given on imperfect death certificates. FINDINGS: The reclassification showed wide variations in the attribution of maternal deaths to single specific medical causes. CONCLUSION: The verbal autopsy methodology has inherent limitations as a means of obtaining histories of medical events. At best it may reconfirm the knowledge that mortality among poor women with little access to medical care is higher than that among wealthier women who have better access to such care. PMID:11584727

  6. [Designing and application of a Risk Communication Program for children environmental health on a lead and arsenic contaminated location].

    PubMed

    Cubillas-Tejeda, Ana Cristina; Torres-Nerio, Rocío; Díaz-Barriga Martínez, Fernando; Carrizales-Yáñez, Leticia; Coronado-Salas, Citlalhit; Nieto Caraveo, Luz María; Moreno Sánchez, Ana Rosa; Barraza Lomelí, Laura

    2011-10-01

    A metallurgical industry in San Luis Potosí city, México, has contaminated the zone by lead (Pb) and arsenic (As). Since 1989 were reported by our group high concentrations of Pb in blood (PbB) and As in urine (AsU) in the local children. In present work, a Risk Communication Program (RCP) was generated to inform the children about the environmental risks of the site where they live, and to change conducts to diminish the exposure to Pb and As. We worked with 170 children (5 to 7 years) of the zone. The RCP was applied and the evaluation was realized by means of analysis of drawings, questionnaires and biological monitoring. In drawings of the children appeared toxic elements such as Pb, contaminated soil, cigarettes, among others. In the questionnaires applied to the children and family parents it was possible to estimate a change in the knowledge and in some conducts with regard to the pollutants, their effects and their exposure. There was not a decrease in the levels of PbB and in the levels of AsU. These were due probably because the principal route of exposure is not only the soil that had been contemplated previously. PMID:22031141

  7. [Cardiovascular risk in children from 6 to 15 years with exogenous obesity].

    PubMed

    Escudero-Lourdes, Gabriela Virginia; Morales-Romero, Luz Viridiana; Valverde-Ocaña, Concepción; Velasco-Chávez, José Fernando

    2014-01-01

    INTRODUCCIÓN: el riesgo cardiovascular (RCV) es una epidemia creciente relacionada con hábitos alimentarios y estilo de vida que tiene como uno de sus grupos de riesgo a los niños obesos. El objetivo de este estudio es evaluar el RCV en la población infantil obesa, en un hospital de segundo nivel del Instituto Mexicano del Seguro Social en San Luis Potosí, México. MÉTODOS: estudio analítico con diseño transversal. Se incluyeron todos los niños obesos atendidos en el servicio de endocrinología durante un año. Se utilizó la escala Alústiza para medir el RCV. Las variables de estudio fueron: edad, sexo, índice de masa corporal, historia familiar de diabetes, obesidad, toxicomanías, presión arterial y colesterol. El RCV se correlacionó con los valores de colesterol HDL y glucosa por medio de chi cuadrada.

  8. Effect of climatological factors on respiratory syncytial virus epidemics

    PubMed Central

    NOYOLA, D. E.; MANDEVILLE, P. B.

    2008-01-01

    SUMMARY Respiratory syncytial virus (RSV) presents as yearly epidemics in temperate climates. We analysed the association of atmospheric conditions to RSV epidemics in San Luis Potosí, S.L.P., Mexico. The weekly number of RSV detections between October 2002 and May 2006 were correlated to ambient temperature, barometric pressure, relative humidity, vapour tension, dew point, precipitation, and hours of light using time-series and regression analyses. Of the variation in RSV cases, 49·8% was explained by the study variables. Of the explained variation in RSV cases, 32·5% was explained by the study week and 17·3% was explained by meteorological variables (average daily temperature, maximum daily temperature, temperature at 08:00 hours, and relative humidity at 08:00 hours). We concluded that atmospheric conditions, particularly temperature, partly explain the year to year variability in RSV activity. Identification of additional factors that affect RSV seasonality may help develop a model to predict the onset of RSV epidemics. PMID:18177520

  9. Hexavalent Chromium Removal by a Paecilomyces sp. Fungal Strain Isolated from Environment

    PubMed Central

    Cárdenas-González, Juan F.; Acosta-Rodríguez, Ismael

    2010-01-01

    A resistant and capable fungal strain in removing hexavalent chromium was isolated from an environment near of Chemical Science Faculty, located in the city of San Luis Potosí, Mexico. The strain was identified as Paecilomyces sp., by macro- and microscopic characteristics. Strain resistance of the strain to high Cr (VI) concentrations and its ability to reduce chromium were studied. When it was incubated in minimal medium with glucose, another inexpensive commercial carbon source like unrefined and brown sugar or glycerol, in the presence of 50 mg/L of Cr (VI), the strain caused complete disappearance of Cr (VI), with the concomitant production of Cr (III) in the growth medium after 7 days of incubation, at 28°C, pH 4.0, 100 rpm, and an inoculum of 38 mg of dry weight. Decrease of Cr (VI) levels from industrial wastes was also induced by Paecilomyces biomass. These results indicate that reducing capacity of chromate resistant filamentous fungus Cr (VI) could be useful for the removal of Cr (VI) pollution. PMID:20634988

  10. [Designing and application of a Risk Communication Program for children environmental health on a lead and arsenic contaminated location].

    PubMed

    Cubillas-Tejeda, Ana Cristina; Torres-Nerio, Rocío; Díaz-Barriga Martínez, Fernando; Carrizales-Yáñez, Leticia; Coronado-Salas, Citlalhit; Nieto Caraveo, Luz María; Moreno Sánchez, Ana Rosa; Barraza Lomelí, Laura

    2011-10-01

    A metallurgical industry in San Luis Potosí city, México, has contaminated the zone by lead (Pb) and arsenic (As). Since 1989 were reported by our group high concentrations of Pb in blood (PbB) and As in urine (AsU) in the local children. In present work, a Risk Communication Program (RCP) was generated to inform the children about the environmental risks of the site where they live, and to change conducts to diminish the exposure to Pb and As. We worked with 170 children (5 to 7 years) of the zone. The RCP was applied and the evaluation was realized by means of analysis of drawings, questionnaires and biological monitoring. In drawings of the children appeared toxic elements such as Pb, contaminated soil, cigarettes, among others. In the questionnaires applied to the children and family parents it was possible to estimate a change in the knowledge and in some conducts with regard to the pollutants, their effects and their exposure. There was not a decrease in the levels of PbB and in the levels of AsU. These were due probably because the principal route of exposure is not only the soil that had been contemplated previously.

  11. Radon (222Rn) in groundwater studies in two volcanic zones of central Mexico

    NASA Astrophysics Data System (ADS)

    Cortés, A.; Cardona, A.; Pérez-Quezadas, J.; Inguaggiato, S.; Vázquez-López, C.; Golzarri, J. I.; Espinosa, G.

    2013-07-01

    The distribution of radon (222Rn) concentrations in groundwater from two basins of volcanic origin is presented. Regions have different physiographic characteristics with fractured mafic/intermediate and felsic rocks. Samples were taken from deep wells and springs. Concentrations were field measured by two methods: i) scintillator, coupled to a photomultiplier, and ii) passive method, using Nuclear Track Detectors. Qualitatively, results of 222Rn measured with both techniques are comparable only when concentrations have values less than 1 Bq/l. For the Basin of Mexico City the data shows an average difference of 0.13 Bq/l. Results of 222Rn concentrations in 46 groundwater samples indicate that the data are below 11.1 Bq/l, with both methodologies. Low concentrations of 222Rn in the Basin of Mexico City are related to the mafic intermediate composition rocks such as basalt. The anomalies with high values are correlated with the transition zone between volcanic units and clays from ancient lakes. In San Luis Potosí 10 samples show an average of 4.2 Bq/l. These concentrations compared with those of the Basin of Mexico City are related to the composition of the felsic (rhyolite) volcanic rocks.

  12. A novel homozygous mutation at the GAA gene in Mexicans with early-onset Pompe disease.

    PubMed

    Esmer, Carmen; Becerra-Becerra, Rosario; Peña-Zepeda, Claudia; Bravo-Oro, Antonio

    2013-10-01

    Glycogen-storage disease type II, also named Pompe disease, is caused by the deficiency of the enzyme acid alpha-glucosidase, which originates lysosomal glycogen accumulation leading to progressive neuromuscular damage. Early-onset Pompe disease shows a debilitating and frequently fulminating course. To date, more than 300 mutations have been described; the majority of them are unique to each affected individual. Most early-onset phenotypes are associated with frameshift mutations leading to a truncated alpha-glucosidase protein with loss of function. Founder effects are responsible from many cases from few highprevalence world regions. Herein we described two apparently unrelated cases affected with classical early-onset Pompe disease, both pertaining to a small region from Central Mexico (the State of San Luis Potosí), the same novel homozygous frameshift mutation at gene GAA (c.1987delC) was demonstrated in both cases. This GAA gene deletion implies a change of glutamine to serine at codon 663, and a new reading frame that ends after 33 base pairs, which leads to the translation of a truncated protein. This report contributes to widen the knowledge on the effect of pathogenic mutations in Pompe disease. Here we postulate the existence of a founder effect.

  13. Apoptosis of peripheral blood mononuclear cells in children exposed to arsenic and fluoride.

    PubMed

    Rocha-Amador, Diana O; Calderón, Jaqueline; Carrizales, Leticia; Costilla-Salazar, Rogelio; Pérez-Maldonado, Iván Nelinho

    2011-11-01

    In this study, we evaluated apoptosis induction in human immune cells in children exposed to arsenic (As) and fluoride (F). Children living in two areas in Mexico (Soledad de Graciano Sanchez (SGS) in San Luis Potosí and Colonia 5 de Febrero in Durango) were studied. Water, urine and blood samples were collected. Approximately 90% of the water samples in 5 de Febrero had As and F levels above the World Health Organization intervention guideline (10 μg/L and 1.5mg/L, respectively). In SGS, 0% of the water samples exceeded Mexican guidelines. Urinary As and F levels in children living in 5 de Febrero were significantly higher than the levels found in children living in SGS. In addition, the level of apoptosis was higher in children from the 5 de Febrero community when compared with the level of apoptosis in children living in SGS. Thus, in a worldwide context, our study demonstrates the health risks to children living in these regions.

  14. The Experimental Discovery of Double-Charm Baryons

    NASA Astrophysics Data System (ADS)

    Engelfried, Jürgen; Selex Collaboration

    2005-04-01

    In 2002, the SELEX [The SELEX (Fermilab E781) Collaboration: Ball State University, Bogazici University, Carnegie-Mellon University, Centro Brasileiro de Pesquisas Fisicas, Fermilab, Institute For High Energy Physics (Protvino), Institute of High Energy Physics (Beijing), Institute of Theoretical and Experimental Physics (Moscow), Max-Planck-Institute for Nuclear Physics, Moscow State University, Petersburg Nuclear Physics Institute, Tel Aviv University, Universidad Autónoma de San Luis Potosí, Universidade Federal da Paraíba, H. H. Wills Physics Laboratory, University of Bristol, University of Iowa, University of Michigan-Flint, University of Rochester, University of Rome La Sapienza and INFN, University of São Paulo, University of Trieste and INFN. http://www-selex.fnal.gov] Experiment (Fermilab E781) reported the first observation of a member of the family of doubly charmed baryons [SELEX Collaboration, M. Mattson et al.: First observation of the doubly charmed baryonΞcc+. Phys. Rev. Letters 89 (2002) 112001, [ arXiv:hep-ex/0208014

  15. 78 FR 61000 - Additional Designations, Foreign Narcotics Kingpin Designation Act

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-10-02

    ...: GRUPO COMERCIAL ROOL, S.A. DE C.V.). 4. REYES MAGANA, Felipe, Calle Juan Jose Arreola 535, Col. Lomas... RODRIGUEZ, Luis Fernando; a.k.a. RODRIGUEZ MORFIN, Luis; a.k.a. RODRIGUEZ OLIVERA, Luis Fernando), Plaza.... RODRIGUEZ OLIVERA, Luis (a.k.a. MORFAN RODRIGUEZ, Luis Fernando; a.k.a. RODRIGUEZ MORFIN, Luis;...

  16. 78 FR 70035 - Notice of Intent To Prepare an Environmental Impact Statement for the San Luis Transmission...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-22

    ... Tribal Governments (65 FR 67249); the President's memorandum of April 29, 1994, Government-to- Government Relations with Native American Tribal Governments (59 FR 22951); DOE-specific guidance on tribal... communications facilities (e.g., overhead fiber optic ground wires, regeneration facilities) for access...

  17. Student Teacher and Cooperating Teacher Tensions in a High School Mathematics Teacher Internship: The Case of Luis and Sheri

    ERIC Educational Resources Information Center

    Rhoads, Kathryn; Samkoff, Aron; Weber, Keith

    2013-01-01

    We investigate interpersonal difficulties that student teachers and cooperating teachers may experience during the teaching internship by exploring the tension between one high school mathematics student teacher and his cooperating teacher. We identified seven causes of this tension, which included different ideas about what mathematics should be…

  18. 76 FR 62819 - Notice of Intent To Amend the Resource Management Plan for the San Luis Resource Area, Colorado...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-10-11

    ..., intends to prepare a Resource Management Plan (RMP) Amendment with an associated Environmental Assessment... and identify issues. DATES: This notice initiates the public scoping process for the RMP amendment and... local media and newspapers. In order to be included in the RMP amendment and associated EA, all...

  19. 76 FR 33362 - Request for Interest in Lease Arrangement on Federal Lands, San Luis Project, Los Banos, California

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-08

    ... our limited water resources. As part of securing America's energy future, the nation is moving toward a clean-energy economy. Interior has been changing the way it does business by opening its doors to... any entity or entities interested in developing a renewable energy project(s) in a lease...

  20. 76 FR 41811 - Kellaway Proposed Low-Effect Habitat Conservation Plan for the Morro Shoulderband Snail, San Luis...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-15

    ... dune) snail was listed by the U.S. Fish and Wildlife Service as endangered on December 15, 1994 (59 FR... Fish and Wildlife Service Kellaway Proposed Low-Effect Habitat Conservation Plan for the Morro... low-effect habitat conservation plan (plan). We invite comments from the public on the...

  1. 77 FR 21797 - Hopper Mountain, Bitter Creek, and Blue Ridge National Wildlife Refuges, Ventura, Kern, San Luis...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-11

    ... intent published on April 6, 2010 (75 FR 17430), two planning updates, a CCP Web page ( http://www.fws.... 1531 et seq.), primarily to restore the endangered California condor population to its native range. Due to the sensitivity of the California condor recovery activities, the Refuges are currently...

  2. 75 FR 17430 - Hopper Mountain, Bitter Creek, and Blue Ridge National Wildlife Refuges, Kern, San Luis Obispo...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-04-06

    ... condor, its habitat, and other wildlife resources. The refuge encompasses 2,471 contiguous acres owned in... for California condors. The refuge encompasses nearly 14,097 acres owned in fee title by the U.S. Fish... condor. Blue Ridge NWR encompasses 897 acres owned in fee title by the U.S. Fish and Wildlife...

  3. 78 FR 57651 - Habitat Conservation Plan for the Community of Los Osos, San Luis Obispo County, CA; Notice of...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-19

    ..., intend to prepare either an Environmental Assessment (EA) or an Environmental Impact Statement (EIS) under the National Environmental Policy Act, as amended (NEPA), for the proposed Los Osos Community-wide... Environmental Policy Act of 1969, as amended (42 U.S.C. 4321 et seq.; NEPA), and its implementing regulations...

  4. Development and Application of Multidisciplinary Sustainability Metrics to Environmental Management in the San Luis Basin in Colorado at AESS

    EPA Science Inventory

    A pilot project was initiated to create an approach to measure, monitor, and maintain prosperity and environmental quality within a regional system. The goal was to produce a scientifically defensible but straightforward and inexpensive methodology that is simple to use and int...

  5. Reabilitation of degraded area by erosion, using soil bioengineering techniques in Bacanga river basin, Sao Luis City - Maranhao State, Brazil.

    NASA Astrophysics Data System (ADS)

    Teixeira Guerra, A. J.; Rodrigues Bezerra, J. F.; da Mota Lima, L. D.; Silva Mendonça, J. K.; Vieira Souza, U. D.; Teixeira Guerra, T.

    2009-04-01

    The aim of this paper is to assess the stages of rehabilitation of a degraded site by erosion, in Salina/Sacavém district, São Luís City, considering geomorphologic characteristics and soil bioengineering techniques. This technique has been applied in different situations to rehabilitate degraded areas, with positive results from the use of biodegradable materials (e.g. vegetal fibres, wooden stakes and re-vegetation). These techniques stabilize the soil at low cost and improve the environment. Bioengineering involves the planned and strategic application of selected materials, involving biodegradable materials, often in combination with 'hard engineering' structures constructed from stone, concrete and steel. The settlement of São Luís was established in 1612 and has evolved in distinct phases. Rapid urban growth was associated with industrialization in the second half of the 18th Century. Rapid population and urban growth has intensified problems, compounded by poor planning and improper soil use. São Luís, like many other Brazilian cities, has experienced rapid population growth in recent decades, which has created a series of socio-economic and environmental problems, including accelerated soil erosion. Sacavém is one of these communities where natural and human factors contribute to the severe gully erosion. The local lithology is mainly Tertiary sandstones and, to a lesser extent, shales, argillites and siltstones, all of which belong to the Barreiras Formation. Weathering on these rocks produces erodible soils, including lithosols, latosols, concretionary red/yellow clay soils and concretionary plinthosols. Thus, erodible soils and regolith are subject to high erosion rates, especially on steeper slopes subject to additional human interventions. Furthermore, although regional slopes are quite gentle, there is localized high relative relief. Sacavém vegetation, in the gullied area, consists of brushwood. Secondary mixed forest and brushwood are the dominant vegetal cover adjacent to the urban gullies. The local climate is humid tropical, with average annual temperatures of 26°C, reaching higher values in October to December and lower from April to June. Rainfall distribution throughout the year is irregular, marked by two very distinct seasons (rainy and dry). The highly seasonal erosive rains incise a complex series of soil erosion landforms, mainly gullies in this area. The following procedures have been carried out: fieldwork with monitoring of gully head erosion; Environmental Education Program; handcraft workshop regarding the prodution of geotextiles from Buriti fiber. The rehabilitation of this degraded site, follows these stages: 1. Acquisition of equipment and materials; 2. Contracting workers; 3. Reshaping selected gully walls; 4. Adding organic palm materials to the topsoil and ~30 kg of grass seeds; 5. Application of geotextile anchored on the ground by using wooden stakes; 6. Maintenance work with photographic records; 7. Photo comparison to measure the vegetal cover percentage, with the aid of geoprocessing software. Some of the gully walls presented steep slopes, around 90 degrees, and therefore, it was necessary to reshape them for the application of soil bioengineering techniques. It was selected a sample area of 2.000 m2 to be rehabilitated. The knowledge of soil and geomorphological characteristics was essential to understand surface runoff, considering the direction of water flows. Due to the difficulties in diverting the flows, which would require more extensive engineering works, the channel was maintained, and the base of the slopes was strengthened to support the flows. In the upper part of this area, which had ~8° slope angle, contour lines were surveyed and barriers of wooden stakes were used to retard runoff velocity from adjacent vegetated slopes. Some slopes in this part had a 45° slope angle, due to the local topography. However, this angle is considered too steep for the application of palm-mats. In some parts of gully, work was completed to reshape the gullies and construct the ~12 m high terraces using the gully material. Tractor work was impeded, because on the second terrace the tractor had difficulty in working, because of the high sand content, which made the slope unstable. These terraces are crossed by a flow convergence area, which was formed by men inserting sand bags, decomposing palm leaves and grass seeds, to form a vegetated channel after grass growth. Key-words: Rehabilitation, gully, geotextile, soil bioengineering.

  6. Fleas (Siphonaptera) infesting giant kangaroo rats (Dipodomys ingens) on the Elkhorn and Carrizo Plains, San Luis Obispo County, California.

    PubMed

    Tabor, S P; Williams, D F; Germano, D J; Thomas, R E

    1993-01-01

    The giant kangaroo rat, Dipodomys ingens (Merriam), has a limited distribution in the San Joaquin Valley, CA. Because of reductions in its geographic range, largely resulting from humans, the species was listed as an endangered species in 1980 by the California Fish and Game Commission. As part of a study of the community ecology of southern California endangered species, including D. ingens, we were able to make flea collections from the rats when they were trapped and marked for population studies. All but one of the fleas collected from the D. ingens in this study were Hoplopsyllus anomalus, a flea normally associated with ground squirrels (Sciuridae). It has been suggested that giant kangaroo rats fill the ground squirrel niche within their range. Our data indicate that this role includes a normal association with Hoplopsyllus anomalus.

  7. 78 FR 73557 - Guadalupe-Nipomo Dunes National Wildlife Refuge, San Luis Obispo County, CA: Intent To Prepare a...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-06

    ..., objectives, and strategies that will ensure the best possible approach to wildlife, plant, and habitat... habitats and assist in the recovery of native plants and animals that are federally listed as threatened or..., protecting and restoring biodiversity, creating and leading conservation partnerships, and providing safe...

  8. 76 FR 31678 - San Luis & Rio Grande Railroad-Continuance in Control Exemption-Saratoga and North Creek Railway...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-01

    .... (PBR), which in turn is owned by Iowa Pacific Holdings, LLC, a noncarrier short line holding company. PBR currently owns the following Class III rail carriers: SLRG, West Texas & Lubbock Railway,...

  9. Using Lagrangian sampling to study water quality during downstream transport in the San Luis Drain, California, USA

    USGS Publications Warehouse

    Volkmar, E.C.; Dahlgren, R.A.; Stringfellow, W.T.; Henson, S.S.; Borglin, S.E.; Kendall, C.; Van Nieuwenhuyse, E. E.

    2011-01-01

    To investigate the mechanism for diel (24h) changes commonly observed at fixed sampling locations and how these diel changes relate to downstream transport in hypereutrophic surface waters, we studied a parcel of agricultural drainage water as it traveled for 84h in a concrete-lined channel having no additional water inputs or outputs. Algal fluorescence, dissolved oxygen, temperature, pH, conductivity, and turbidity were measured every 30min. Grab samples were collected every 2h for water quality analyses, including nutrients, suspended sediment, and chlorophyll/pheophytin. Strong diel patterns were observed for dissolved oxygen, pH, and temperature within the parcel of water. In contrast, algal pigments and nitrate did not exhibit diel patterns within the parcel of water, but did exhibit strong diel patterns for samples collected at a fixed sampling location. The diel patterns observed at fixed sampling locations for these constituents can be attributed to algal growth during the day and downstream transport (washout) of algae at night. Algal pigments showed a rapid daytime increase during the first 48h followed by a general decrease for the remainder of the study, possibly due to sedimentation and photobleaching. Algal growth (primarily diatoms) was apparent each day during the study, as measured by increasing dissolved oxygen concentrations, despite low phosphate concentrations (<0.01mgL-1). ?? 2011 Elsevier B.V.

  10. Review of samples of water, sediment, tailings, and biota at the Little Bonanza mercury mine, San Luis Obispo County, California

    USGS Publications Warehouse

    Rytuba, James J.; Hothem, Roger L.; Goldstein, Daniel N.; Brussee, Brianne E.; May, Jason T.

    2011-01-01

    Sample Sites and Methods Samples were collected to assess the concentrations of Hg and biogeochemically relevant constituents in tailings and wasterock piles at the Little Bonanza Hg mine. Tailings are present adjacent to a three-pipe retort used to process the Hg ore. The tailings occur in the upper 15 cm of the soil adjacent to the retort and slag from the retort is present on the surface. An area of disturbed soil and rock uphill from the retort was likely formed during construction of a dam that provided water for mining activities. Wasterock in these piles was sampled. The largest amount of tailings is exposed to the west of the retort in the bank of WF Las Tablas Creek. Water, sediment, and biota were sampled from WF Las Tablas Creek, which flows through the mine area. Sample-site locations are shown in figures 10 and 11 and listed in table 1. Samples were collected when streamflow was low and no precipitation had occurred.

  11. 76 FR 45602 - Proposed Safe Harbor Agreement for California Red-Legged Frog, at Swallow Creek Ranch, San Luis...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-07-29

    ... Service's Safe Harbor Policy published in the Federal Register on June 17, 1999 (64 FR 32717), the Service... Fish and Wildlife Service Proposed Safe Harbor Agreement for California Red-Legged Frog, at Swallow... the Federally threatened California red-legged frog (Rana draytonii), under the Endangered Species...

  12. Map showing coastal cliff retreat rates along the Big Sur coast, Monterey and San Luis Obispo Counties, California

    USGS Publications Warehouse

    Hapke, Cheryl J.; Green, Krystal R.

    2004-01-01

    The average coastal cliff retreat rate along the Big Sur coast is 18 ? 6 cm/yr as measured over a 52-year time period. The erosion reference features measured as the cliff edge include the well-defined cliff edges common to marine terraces, slight breaks in the slope defining the upper edge of the active lower slope, and the road grade. Cliff erosion and retreat are focused in isolated erosion hotspots that account for most of the calculated average retreat.

  13. 77 FR 49856 - Environmental Impact Statement for the Salinas to San Luis Obispo Portion of the Coast Corridor...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-17

    ... relieve some of the projected near- and long-term demand on the highway system, potentially slowing the... generate increased travel demand. By 2040, statewide population is expected to grow substantially, further... challenges as evidenced by the following: Constrained Travel Options--While the Coast Corridor is served by...

  14. Support Services for Exceptional Students: Fresno, Inyo, Kern, Kings, Madera, Mariposa, Merced, Mono, San Luis Obispo, and Tulare Counties.

    ERIC Educational Resources Information Center

    Hampel, Angelica; And Others

    Intended for use by vocational administrators responsible for mainstreaming handicapped students into vocational education classes, the resource guide lists and describes governmental and private agencies that provide vocational programs and support services for the handicapped on a local and statewide basis in the California counties of Fresno,…

  15. Reabilitation of degraded area by erosion, using soil bioengineering techniques in Bacanga river basin, Sao Luis City - Maranhao State, Brazil.

    NASA Astrophysics Data System (ADS)

    Teixeira Guerra, A. J.; Rodrigues Bezerra, J. F.; da Mota Lima, L. D.; Silva Mendonça, J. K.; Vieira Souza, U. D.; Teixeira Guerra, T.

    2009-04-01

    The aim of this paper is to assess the stages of rehabilitation of a degraded site by erosion, in Salina/Sacavém district, São Luís City, considering geomorphologic characteristics and soil bioengineering techniques. This technique has been applied in different situations to rehabilitate degraded areas, with positive results from the use of biodegradable materials (e.g. vegetal fibres, wooden stakes and re-vegetation). These techniques stabilize the soil at low cost and improve the environment. Bioengineering involves the planned and strategic application of selected materials, involving biodegradable materials, often in combination with 'hard engineering' structures constructed from stone, concrete and steel. The settlement of São Luís was established in 1612 and has evolved in distinct phases. Rapid urban growth was associated with industrialization in the second half of the 18th Century. Rapid population and urban growth has intensified problems, compounded by poor planning and improper soil use. São Luís, like many other Brazilian cities, has experienced rapid population growth in recent decades, which has created a series of socio-economic and environmental problems, including accelerated soil erosion. Sacavém is one of these communities where natural and human factors contribute to the severe gully erosion. The local lithology is mainly Tertiary sandstones and, to a lesser extent, shales, argillites and siltstones, all of which belong to the Barreiras Formation. Weathering on these rocks produces erodible soils, including lithosols, latosols, concretionary red/yellow clay soils and concretionary plinthosols. Thus, erodible soils and regolith are subject to high erosion rates, especially on steeper slopes subject to additional human interventions. Furthermore, although regional slopes are quite gentle, there is localized high relative relief. Sacavém vegetation, in the gullied area, consists of brushwood. Secondary mixed forest and brushwood are the dominant vegetal cover adjacent to the urban gullies. The local climate is humid tropical, with average annual temperatures of 26°C, reaching higher values in October to December and lower from April to June. Rainfall distribution throughout the year is irregular, marked by two very distinct seasons (rainy and dry). The highly seasonal erosive rains incise a complex series of soil erosion landforms, mainly gullies in this area. The following procedures have been carried out: fieldwork with monitoring of gully head erosion; Environmental Education Program; handcraft workshop regarding the prodution of geotextiles from Buriti fiber. The rehabilitation of this degraded site, follows these stages: 1. Acquisition of equipment and materials; 2. Contracting workers; 3. Reshaping selected gully walls; 4. Adding organic palm materials to the topsoil and ~30 kg of grass seeds; 5. Application of geotextile anchored on the ground by using wooden stakes; 6. Maintenance work with photographic records; 7. Photo comparison to measure the vegetal cover percentage, with the aid of geoprocessing software. Some of the gully walls presented steep slopes, around 90 degrees, and therefore, it was necessary to reshape them for the application of soil bioengineering techniques. It was selected a sample area of 2.000 m2 to be rehabilitated. The knowledge of soil and geomorphological characteristics was essential to understand surface runoff, considering the direction of water flows. Due to the difficulties in diverting the flows, which would require more extensive engineering works, the channel was maintained, and the base of the slopes was strengthened to support the flows. In the upper part of this area, which had ~8° slope angle, contour lines were surveyed and barriers of wooden stakes were used to retard runoff velocity from adjacent vegetated slopes. Some slopes in this part had a 45° slope angle, due to the local topography. However, this angle is considered too steep for the application of palm-mats. In some parts of gully, work was completed to reshape the gullies and constru

  16. Brevibacterium metallicus sp. nov., an endophytic bacterium isolated from roots of Prosopis laegivata grown at the edge of a mine tailing in Mexico.

    PubMed

    Román-Ponce, Brenda; Li, Yong Hua; Vásquez-Murrieta, María Soledad; Sui, Xin Hua; Chen, Wen Feng; Estrada-de Los Santos, Paulina; Wang, En Tao

    2015-12-01

    A Gram-positive, aerobic, nonmotile strain, NM2E3(T) was identified as Brevibacterium based on the 16S rRNA gene sequence analysis and had the highest similarities to Brevibacterium jeotgali SJ5-8(T) (97.3 %). This novel bacterium was isolated from root tissue of Prosopis laegivata grown at the edge of a mine tailing in San Luis Potosí, Mexico. Its cells were non-spore-forming rods, showing catalase and oxidase activities and were able to grow in LB medium added with 40 mM Cu(2+), 72 mM As(5+) and various other toxic elements. Anteiso-C15:0 (41.6 %), anteiso-C17:0 (30 %) and iso-C15:0 (9.5 %) were the major fatty acids. MK-8(H2) (88.4 %) and MK-7(H2) (11.6 %) were the major menaquinones. The DNA G + C content of the strain NM2E3(T) was 70.8 mol % (Tm). DNA-DNA hybridization showed that the strain NM2E3(T) had 39.8, 21.7 and 20.3 % relatedness with B. yomogidense JCM 17779(T), B. jeotgali JCM 18571(T) and B. salitolerans TRM 45(T), respectively. Based on the phenotypic and genotypic analyses, the strain NM2E3(T) (=CCBAU 101093(T) = HAMBI 3627(T) = LMG 8673(T)) is reported as a novel species of the genus Brevibacterium, for which the name Brevibacterium metallicus sp. nov., is proposed.

  17. Eruptive and structural controls on the evolution of Mexican maar volcanoes

    NASA Astrophysics Data System (ADS)

    Carrasco, G.; Ort, M. H.

    2013-05-01

    Although monogenetic volcanoes seem to have a very simple eruptive history, the geologic evolution of maar volcanoes is more complex because they involve a fluctuating explosive behavior due to rapid changes in how an ascending magma interacts with a source of external water. Maar volcanoes evolve in different ways depending on several factors such as magma extrusion rate, explosion depth variation, water/magma ratio, increasing cratering, viscosity, as well as characteristics of the country rock and structural features of the regional setting., Three main maar volcano fields, San Luis Potosí, Valle de Santiago and Serdán-Oriental, occur in central Mexico. In the first two fields, a strong tectonic control is evident for the general distribution of the volcanoes, while in the third case, a more local influence of shallow crustal fractures seems to control the migration of the explosion locus, causing elongated or craters shapes. Initial magma extrusion rates may have played an important role in producing different types of maar volcanoes. Also, the location of the explosions within the upper unconsolidated granular aquifer (brown tuff) or the deeper highly-fractured bedrock aquifer may control the efficiency of the explosions. Deepening and lateral migration of explosion loci are commonly observed in maar volcanoes, and lateral migration is strongly controlled by the regional stress regime. Eruptive styles vary from surge- and blast-dominated eruptions to alternating strombolian and vulcanian activity. Some show a drying-upward trend but others change from dry magmatic activity (hawaiian lava flows, followed by strombolian scoria) to highly fragmented hydromagmatic maar-forming explosions, which includes the periodic injection of juvenile material, particularly at the end of the eruptive phase.

  18. In vitro immunopotentiating properties and tumour cell toxicity induced by Lophophora williamsii (peyote) cactus methanolic extract.

    PubMed

    Franco-Molina, M; Gomez-Flores, R; Tamez-Guerra, P; Tamez-Guerra, R; Castillo-Leon, L; Rodríguez-Padilla, C

    2003-11-01

    Lophophora williamsii, also known as peyote, is found primarily in dry regions from Central Mexico, including the Mexican States of Nayarit, San Luis Potosí, Zacatecas, Nuevo León, Chihuahua, Coahuila and Tamaulipas, to Texas particularly in regions along Rio Grande. Peyote extracts have been associated with stimulating the central nervous system and regulating blood pressure, sleep, hunger and thirst. However, there is no evidence of any effect of peyote on the immune system or against tumour cell growth. The present study was designed to evaluate the in vitro effects of peyote methanolic extracts on some parameters of mouse and human leukocyte immunocompetence and tumour cell growth. Peyote extract (0.18-18 micro g/mL) activated nitric oxide production by murine macrophages, and stimulated up to 2.4-fold proliferation of murine thymic lymphocytes. In addition, peyote extract induced up to 1.85-, 2.29- and 1.89-fold increases in mRNA signal of IL-1, IL-6 and IL-8 by human leukocytes. Also examined were the effects of peyote extracts on murine lymphoma L5178Y-R and fi broblastoma L929, and human myeloid U937 and mammary gland MCF7 tumour cell growth using 3-[4,5-dimethylthiazol-2-yl]-2,5-diphenyltetrazolium bromide (MTT). Peyote extracts were toxic for MCF7, L5178Y-R, U937 and L929 (18 mg/mL peyote extract caused 1.3%, 8%, 45% and 60% viability respectively) cell lines.

  19. [Dietary training for school food service providers in support of the Acuerdo Nacional para la Salud Alimentaria].

    PubMed

    Muñoz-Dávila, Carolina; Rangel-Peniche, Diana Beatriz

    2015-01-01

    Introducción: en apoyo a la problemática de sobrepeso y obesidad en México, en el 2010 se publicó el Acuerdo Nacional para la Salud Alimentaria. A nivel escolar, los comodatarios se consideraron fundamentales para cumplir con ciertos compromisos. El objetivo de esta intervención fue capacitar a comodatarios de los Establecimientos de Consumo Escolar (ECE) en cuanto a los criterios establecidos en los “Lineamientos Generales para el Expendio y Distribución de Alimentos en Planteles de Educación Básica.” Métodos: participaron 13 ECE en San Luis Potosí. Con base en un diagnóstico inicial, se diseñó un curso-taller de 5 sesiones. Se evaluaron conocimientos en materia alimentaria al inicio y al final de las sesiones. Se obtuvo el porcentaje de apego en cuanto a higiene general, preparación y distribución de alimentos, al inicio, al mes y a los dos meses postintervención. Resultados: los comodatarios presentaron pocos conocimientos en los objetivos que persigue el “Acuerdo” en grupos y combinación de alimentos así como en lectura de etiquetas; con cambios significativos en los dos últimos tras la intervención. El porcentaje inicial de cumplimiento en higiene general fue del 60 %, con un incremento de casi 20 % postcapacitación. La preparación y distribución de alimentos no presentaron cambios significativos. Conclusiones: los comodatarios adquirieron conocimientos sobre los lineamientos que debe cubrir un ECE, sin ponerlos en práctica, dado el impacto que ello implica en su economía.

  20. Secular variation from Mexican stalagmites: their potential and problems

    NASA Astrophysics Data System (ADS)

    Latham, A. G.; Ford, D. C.; Schwarcz, H. P.; Birchall, T.

    1989-07-01

    As part of a feasibility study to see whether stalagmites could provide useful records of secular variation, nine oriented stalagmites were collected from the states of Chiapas and San Luis Potosí, Mexico. Of these, six have yielded measurable natural remanent magnetizations (NRMs) throughout their length. The cleaned magnetizations of one of these samples were shown unequivocally to have recorded the ambient field, and there is no reason to believe that this is not true of the primary magnetizations of other samples. The sequences of palaeofield directions, up the samples' length, have varying degrees of resolution and serial correlation, depending on the rate of field change as averaged by the stalagmite growth rate and the thickness of the measured specimens. Ages and growth rates were estimated by the U-Th method. The main problem in stalagmite palaeomagnetic analysis is a weak NRM, although this may be avoided by judicious choice of the sample. Samples which possess significant viscous components may be cleaned by alternating field or thermally if there is sufficient magnetic material. Unlike many sediments, stalagmites do not appear to suffer from depositional error problems. Dating problems may include low initial U-content, yielding ages with large errors, and the presence of allogenic 230Th in detritus, which causes older apparent ages. The dating limit is ˜ 350 ka. It is usually not possible to obtain long records comparable with those of most lake sediments, and there are aesthetic reasons for not spoiling caves adorned with stalagmites. The method is seen to be complementary to the use of sedimentary sequences to study palaeosecular variation. Studies of the rock magnetism of stalagmites are presented to suggest the mineral carriers of the magnetization and the origins of the natural remanence.

  1. Food assistance programmes are indirectly associated with anaemia status in children <5 years old in Mexico.

    PubMed

    Shamah-Levy, Teresa; Méndez-Gómez-Humarán, Ignacio; Gaona-Pineda, Elsa B; Cuevas-Nasu, Lucia; Villalpando, Salvador

    2016-09-01

    Anaemia in children is a public health concern in Mexico; Federal food assistance programmes are being implemented to prevent it. We undertook this research to investigate the indirect association between food assistance programmes (FAP) and anaemia through dietary and socio-economic conditions of beneficiary children. A structural equation model (SEM) was constructed to assess associations among FAP, dietary and socio-economic conditions, as well as anaemia. A cross-sectional comparative study was conducted based on a sample of 1214 households with children <5 years old, beneficiaries of two FAP: Prospera and rescue from malnutrition with amaranth (RMA) and a comparison group in San Luis Potosí, Mexico. The SEM and a decomposition effect analysis revealed the existence of a significant indirect association of FAP on the prevalence of anaemia via dietary and socio-economic conditions in children under 5 years old. The Prospera assistance programme showed a significant indirect positive association with the prevalence of anaemia (standard coefficient=0·027, P<0·031), and the RMA programme showed a significant indirect negative association with the prevalence of anaemia (standard coefficient=-0·029, P=0·047). There was a direct association between FAP and dietary and socio-economic conditions. FAP could indirectly modify the prevalence of anaemia in young children with a direct improvement on dietary and socio-economic conditions. The unexpected finding of the association between RMA, dietary and socio-economic conditions and the prevalence of anaemia reflects differences in the focus of the programmes.

  2. Food assistance programmes are indirectly associated with anaemia status in children <5 years old in Mexico.

    PubMed

    Shamah-Levy, Teresa; Méndez-Gómez-Humarán, Ignacio; Gaona-Pineda, Elsa B; Cuevas-Nasu, Lucia; Villalpando, Salvador

    2016-09-01

    Anaemia in children is a public health concern in Mexico; Federal food assistance programmes are being implemented to prevent it. We undertook this research to investigate the indirect association between food assistance programmes (FAP) and anaemia through dietary and socio-economic conditions of beneficiary children. A structural equation model (SEM) was constructed to assess associations among FAP, dietary and socio-economic conditions, as well as anaemia. A cross-sectional comparative study was conducted based on a sample of 1214 households with children <5 years old, beneficiaries of two FAP: Prospera and rescue from malnutrition with amaranth (RMA) and a comparison group in San Luis Potosí, Mexico. The SEM and a decomposition effect analysis revealed the existence of a significant indirect association of FAP on the prevalence of anaemia via dietary and socio-economic conditions in children under 5 years old. The Prospera assistance programme showed a significant indirect positive association with the prevalence of anaemia (standard coefficient=0·027, P<0·031), and the RMA programme showed a significant indirect negative association with the prevalence of anaemia (standard coefficient=-0·029, P=0·047). There was a direct association between FAP and dietary and socio-economic conditions. FAP could indirectly modify the prevalence of anaemia in young children with a direct improvement on dietary and socio-economic conditions. The unexpected finding of the association between RMA, dietary and socio-economic conditions and the prevalence of anaemia reflects differences in the focus of the programmes. PMID:27545977

  3. Occupational exposure to radon and natural gamma radiation in the La Carolina, a former gold mine in San Luis Province, Argentina.

    PubMed

    Anjos, R M; Umisedo, N; da Silva, A A R; Estellita, L; Rizzotto, M; Yoshimura, E M; Velasco, H; Santos, A M A

    2010-02-01

    Radon and gamma radiation level measurements were carried out inside the La Carolina mine, one of the oldest gold mining camps of southern South America, which is open for touristic visits nowadays. CR-39 track-etch detectors and thermoluminescent dosimeters of natural CaF(2) and LiF TLD-100 were exposed at 14 points along the mine tunnels in order to estimate the mean (222)Rn concentration and the ambient dose equivalent during the summer season (November 2008 to February 2009). The values for the (222)Rn concentration at each monitoring site ranged from 1.8+/-0.1 kBqm(-3) to 6.0+/-0.5 kBqm(-3), with a mean value of 4.8 kBqm(-3), indicating that these measurements exceed in about three times the upper action level recommended by ICRP for workplaces. The correlations between radon and gamma radiation levels inside the mine were also investigated. Effective doses due to (222)Rn and gamma rays inside the mine were determined, resulting in negligible values to tourists. Considering the effective dose to the mine tourist guides, values exceeding 20mSv of internal contribution to the effective doses can be reached, depending on the number of working hours inside the mine.

  4. Jim. L'historie de Jim Caron jeune homme racontee par lui-meme (Jim. The Story of Jim Caron as a Young Man Told by Himself).

    ERIC Educational Resources Information Center

    Oliver, Julien

    This illustrated account of an interview with Jim Caron, a 101 year-old Franco-American resident of New Hampshire, is intended for use in a bilingual education setting. The narrative is divided into ten chapters and is written in the style of the spoken French dialect of Quebec and New England. In addition to details on the long life of Jim it…

  5. The association of non-insulin-dependent diabetes mellitus with perceived quality of life in a biethnic population: the San Luis Valley Diabetes Study.

    PubMed Central

    Caldwell, E M; Baxter, J; Mitchell, C M; Shetterly, S M; Hamman, R F

    1998-01-01

    OBJECTIVES: This study evaluated the association between quality of life and non-insulin-dependent diabetes mellitus (NIDDM) status, and whether this association differs between Hispanics and non-Hispanic Whites. METHODS: Between 1986 and 1989, cross-sectional data on perceived quality of life (PQOL) were collected from 223 persons with NIDDM and 753 non-diabetic subjects. RESULTS: After adjustment, persons with NIDDM rated their PQOL significantly lower than did control subjects. The relationship of diabetes and PQOL did not differ by ethnicity. The number of complications of diabetes was not associated with lower PQOL scores. CONCLUSIONS: Control and treatment strategies should reflect an understanding of the impact that diabetes has on social functioning, leisure activities, and physical and mental health. PMID:9702155

  6. Effects of topographic position and geology on shaking damage to residential wood-framed structures during the 2003 San Simeon earthquake, western San Luis obispo county, California

    USGS Publications Warehouse

    McCrink, T.P.; Wills, C.J.; Real, C.R.; Manson, M.W.

    2010-01-01

    A statistical evaluation of shaking damage to wood-framed houses caused by the 2003 M6.5 San Simeon earthquake indicates that both the rate and severity of damage, independent of structure type, are significantly greater on hilltops compared to hill slopes when underlain by Cretaceous or Tertiary sedimentary rocks. This increase in damage is interpreted to be the result of topographic amplification. An increase in the damage rate is found for all structures built on Plio-Pleistocene rocks independent of topographic position, and this is interpreted to be the result of amplified shaking caused by geologic site response. Damage rate and severity to houses built on Tertiary rocks suggest that amplification due to both topographic position and geologic site response may be occurring in these rocks, but effects from other topographic parameters cannot be ruled out. For all geologic and topographic conditions, houses with raised foundations are more frequently damaged than those with slab foundations. However, the severity of damage to houses on raised foundations is only significantly greater for those on hill slopes underlain by Tertiary rocks. Structures with some damage-resistant characteristics experienced greater damage severity on hilltops, suggesting a spectral response to topographic amplification. ?? 2010, Earthquake Engineering Research Institute.

  7. Highlighting Changes in the Classrooms of a Successful One-to-One Program in Rural Argentina: Case Studies of "Todos los Chicos en la Red" in San Luis

    ERIC Educational Resources Information Center

    Light, Daniel; Pierson, Elizabeth

    2012-01-01

    One-to-one computing programs and laptop programs have been a popular approach to education reform in developing countries over the last decade. A motivation behind so many one-to-one laptop programs is the desire to overcome with one powerful resource the historical lack of educational tools and resources available in developing countries.…

  8. [Not Available].

    PubMed

    Vizuet Vega, Norma Isela; Shamah Levy, Teresa; Gaona Pineda, Elsa Berenice; Cuevas Nasu, Lucía; Méndez Gómez-Humarán, Ignacio

    2016-07-19

    Introducción: la anemia es un factor de riesgo en la población infantil con consecuencias graves para su crecimiento y desarrollo. Los programas de ayuda alimentaria pueden contribuir a su prevención y control. Objetivo: estudiar la adherencia al consumo de suplementos y su relación con la prevalencia de anemia en niños menores de tres años de edad en San Luis Potosí, México beneficiarios del programa PROSPERA.Métodos: se realizó un análisis comparativo en niños de 12 a 36 meses que consumen diferentes suplementos alimenticios: 414 pertenecientes al grupo de intervención y 334 al de comparación. Se midió la hemoglobina (Hb) por Hemocue clasificando como anémicos a quienes tuvieron valores <110 g/l. Se aplicaron pruebas de t de Student y X2. Se estimaron efectos de intervención mediante el método de diferencias en diferencias y un puntaje de adherencia al consumo de suplementos.Resultados: al final del estudio la prevalencia de anemia disminuyó 11.2 pp en el grupo de intervención y 8.7 pp en el de comparación; la interacción del puntaje de adherencia por suplemento y etapa de observación mostró que la adherencia al consumo de Bebida láctea + Vitaniño reduce el riesgo de presentar anemia (p = 0,14). El consumo de Nutrisano + Vitaniño se asoció con menor riesgo (0,2), ambos con respecto al consumo de Nutrisano.Conclusiones: el programa PROSPERA tuvo efectos importantes en la disminución de las prevalencias de anemia. Se recomienda llevar a cabo acciones para mejorar la adherencia al consumo de suplementos alimenticios, a fIn de mejorar la efectividad de los programas.

  9. Curicaberis, a new genus of Sparassidae from North and Central America (Araneae, Sparassidae, Sparassinae).

    PubMed

    Rheims, Cristina A

    2015-09-04

    The genus Curicaberis gen. nov. is described to include the type species, Curicaberis ferrugineus (C.L. Koch, 1836) comb. nov., and eight other species transferred from Olios Walckenaer, 1837: C. abnormis (Keyserling, 1884) comb. nov., C. annulatus (F.O. Pickard-Cambridge, 1900) comb. nov., C. bibranchiatus (Fox, 1937) comb. nov., C. ensiger (F.O. Pickard-Cambridge, 1900) comb. nov., C. ferrugineus (C.L. Koch, 1836) comb. nov., C. luctuosus (Banks, 1898) comb. nov., C. minax (O. Pickard-Cambridge,1896) comb. nov., C. manifestus (O. Pickard-Cambridge, 1890) comb. nov., and C. peninsulanus (Banks, 1898) comb. nov.. All species are redescribed and illustrated. The males of C. ferrugineus comb. nov. and C. luctuosus comb. nov., and the female of C. annulatus comb. nov. are described and illustrated for the first time. Twenty-three new species are described: C. azul sp. nov. (♂) from Veracruz, C. catarinas sp. nov. (♀) from Chihuahua, C. chamela sp. nov. (♂ and ♀), C. eberhardi sp. nov. (♂ and ♀), C. jalisco sp. nov. (♂ and ♀), and C. urquizai sp. nov. (♂ and ♀) from Jalisco, C. culiacan sp. nov. (♂) from Sinaloa, C. cuyutlan sp. nov. (♂) from Colima, C. durango sp. nov. (♂) from Durango, C. elpunto sp. nov. (♂ and ♀), C. sanpedrito sp. nov. (♂ and ♀), C. tortugero sp. nov. (♀), C. yerba sp. nov. (♀) and C. zapotec sp. nov. (♂) from Oaxaca, C. huitiupan sp. nov. (♂), from Chiapas, C. pedregal sp. nov. (♂) from Distrito Federal, C. potosi sp. nov. (♀) from San Luis Potosí, C. puebla sp. nov. (♀) from Puebla, C. tepic sp. nov. (♀) from Nayarit, and C. mitla sp. nov. (♂ and ♀) from Veracruz and Oaxaca, C. chiapas sp. nov. (♂ and ♀) from Chiapas and Tabasco, all in Mexico, C. granada sp. nov. (♂ and ♀) from Granada and Manágua in Nicaragua and Guanacaste in Costa Rica, and C. bagaces sp. nov. (♀), from Guanacaste, Costa Rica. An identification key and distribution maps are provided for all known species.

  10. Geochemical and Sr Nd Pb isotopic evidence for a combined assimilation and fractional crystallisation process for volcanic rocks from the Huichapan caldera, Hidalgo, Mexico

    NASA Astrophysics Data System (ADS)

    Verma, Surendra P.

    2001-03-01

    This study reports new geochemical and Sr-Nd-Pb isotopic data for Miocene to Quaternary basaltic to andesitic, dacitic, and rhyolitic volcanic rocks from the Huichapan caldera, located in the central part of the Mexican Volcanic Belt (MVB). The initial Sr and Nd isotopic ratios, except for one rhyolite, range as follows: 87Sr/ 86Sr 0.70357-0.70498 and 143Nd/ 144Nd 0.51265-0.51282. The Sr-Nd-Pb isotopic ratios are generally similar to those for volcanic rocks from other areas of the central and eastern parts of the MVB. The isotopic ratios of one older pre-caldera rhyolite (HP30) from the Huichapan area, particularly its high 87Sr/ 86Sr, are significantly different from rhyolitic rocks from this and other areas of the MVB, but are isotopically similar to some felsic rocks from the neighbouring geological province of Sierra Madre Occidental (SMO), implying an origin as a partial melt of the underlying crust. The evolved andesitic to rhyolitic magmas could have originated from a basaltic magma through a combined assimilation and fractional crystallisation (AFC) process. Different compositions, representing lower crust (LC) and upper crust (UC) as well as a hypothetical crust similar to the source of high 87Sr/ 86Sr rhyolite HP30, were tested as plausible assimilants for the AFC process. The results show that the UC represented by granitic rocks from a nearby Los Humeros area or by Cretaceous limestone (L) rocks outcropping in the northern part of the study area, and the LC represented by granulitic xenoliths from a nearby San Luis Potosı´ (SLP) area are not possible assimilants for Huichapan magmas, whereas a hypothetical crust (HA) similar in isotopic compositions to rhyolite HP30 could be considered a possible assimilant for the AFC process. Chemical composition of assimilant HA, although not well constrained at present, was inferred under the assumption that HP30 type partial melts could be generated from its partial melting. These data were then used to evaluate

  11. Raman Spectroscopy an Option for the Early Detection of Citrus Huanglongbing.

    PubMed

    Pérez, Moisés Roberto Vallejo; Mendoza, María Guadalupe Galindo; Elías, Miguel Ghebre Ramírez; González, Francisco Javier; Contreras, Hugo Ricardo Navarro; Servín, Carlos Contreras

    2016-05-01

    This research describes the application of portable field Raman spectroscopy combined with a statistical analysis of the resulting spectra, employing principal component analysis (PCA) and linear discriminant analysis (LDA), in which we determine that this method provides a high degree of reliability in the early detection of Huanglongbing (HLB) on Sweet Orange, disease caused by the bacteria Candidatus Liberibacter asiaticus. Symptomatic and asymptomatic plant samples of Sweet Orange (Citrus sinensis), Persian Lime (C. latifolia), and Mexican Lime (C. aurantifolia) trees were collected from several municipalities, three at Colima State and three at Jalisco State (HLB presence). In addition, Sweet Orange samples were taken from two other Mexican municipalities, one at San Luis Potosí and the other at Veracruz (HLB absent). All samples were analyzed by real-time PCR to determine its phytosanitary condition, and its spectral signatures were obtained with an ID-Raman mini. Spectral anomalies in orange trees HLB-positive, were identified in bands related to carbohydrates (905 cm(-1), 1043 cm(-1), 1127 cm(-1), 1208 cm(-1), 1370 cm(-1), 1272 cm(-1), 1340 cm(-1), and 1260-1280 cm(-1)), amino acids, proteins (815 cm(-1), 830 cm(-1), 852 cm(-1), 918 cm(-1), 926 cm(-1), 970 cm(-1), 1002 cm(-1), 1053 cm(-1), and 1446 cm(-1)), and lipids (1734 cm(-1), 1736 cm(-1), 1738 cm(-1), 1745 cm(-1), and 1746 cm(-1)). Moreover, PCA-LDA showed a sensitivity of 86.9 % (percentage of positives, which are correctly identified), a specificity of 91.4 % (percentage of negatives, which are correctly identified), and a precision of 89.2 % (the proportion of all tests that are correct) in discriminating between orange plants HLB-positive and healthy plants. The Raman spectroscopy technique permitted rapid diagnoses, was low-cost, simple, and practical to administer, and produced immediate results. These are essential features for phytosanitary

  12. Petrographic Evidence of Microbial Mats in the Upper Cretaceous Fish-Bearing, Organic-Rich Limestone, Agua Nueva Formation, Central Mexico

    NASA Astrophysics Data System (ADS)

    Blanco, A.; Maurrasse, F. J.; Hernández-Ávila, J.; Ángeles-Trigueros, S. A.; García-Cabrera, M. E.

    2013-05-01

    We document petrographic evidence of microbial mats in the Upper Cretaceous Agua Nueva Formation in the area of Xilitla (San Luis Potosí, Central Mexico), located in the southern part of the Tampico-Misantla basin. The sequence consists predominantly of alternating decimeter-thick beds of fossiliferous dark laminated limestone (C-org > 1.0wt%), and light gray, bioturbated limestone (C-org < 1.0wt%), with occasional brown shale and green bentonite layers. Well-preserved fossil-fish assemblages occur in the laminated dark limestone beds, which include shark teeth (cf. Ptychodus), scales of teleosteans (Ichthyodectiformes), as well as skeletal remains of holosteans (Nursallia. sp), and teleosteans (cf. Rhynchodercetis, Tselfatia, and unidentified Enchodontids). Thin section and SEM analyses of the laminated, dark limestones, reveal a micritic matrix consisting of dark and light sub-parallel wavy laminae, continuous and discontinuous folded laminae with shreds of organic matter, filaments, oncoids, and interlocking structures. The structures are identical to those previously described for the Cenomanian-Turonian Indidura Fm at Parras de la Fuente (Coahuila state) demonstrated to be of microbial origin (Duque-Botero and Maurrasse, 2005; 2008). These structures are also analogous to microbial mats in present environments, and Devonian deposits (Kremer, 2006). In addition, the laminae at Xilitla include filamentous bacterial structures, as thin and segmented red elements. In some thin sections, filaments appear to be embedded within the crinkly laminae and shreds showing the same pattern of folding, suggestive of biomorphic elements that represent the main producers of the organic matter associated with the laminae. Thus, exceptional bacterial activity characterizes sedimentation during the accumulation of the Agua Nueva Formation. Oxygen-deficient conditions related to the microbial mats were an important element in the mass mortality and preservation of the fish

  13. Orientational data on the state of stress in northeastern Mexico as inferred from stress-induced borehole elongations

    NASA Astrophysics Data System (ADS)

    Suter, Max

    1987-03-01

    Preferential elongation directions are presented from 46 subvertical wells in northeastern Mexico from depth intervals ranging from 161 to 4,912 m. The measurements document a remarkably consistent west-east to northwest-southeast direction of the contemporary least horizontal stress in the upper crust of this intraplate region. In the regional neotectonic framework, the data suggest that Mexico north of the trans-Mexican volcanic belt is being stretched in west-east to northwest-southeast direction. The measurements from the area of the Laramide Chihuahua and Coahuila fold-thrust belts define the southern extend of the Basin and Range—Rio Grande rift stress province of the southwestern United States into northern Mexico. The least horizontal in situ stress directions recorded in the Gulf Coastal Plain (Burgos and Tampico-Misantla Basins) are oblique to the continental margin of the Gulf of Mexico, but subparallel to the direction measured in the area of the Basin and Range—Rio Grande rift stress province. This suggests that the stress distribution in these basins is not mainly the result of gravitational loading as in the Gulf Coast stress province of the United States, but is controlled by the same lithospheric stress system that characterizes the Basin and Range—Rio Grande rift stress province. This is also supported by the north-south trending zone of Oligocene-Quaternary alkaline volcanism that crosses the Tampico-Misantla Basin. Furthermore, the data indicate that the active deformation of the Mexican Ridges fold belt, east of the study area in the Gulf of Mexico cannot be caused by a compressional external tectonic load. The direction of the least horizontal in situ stress measured in the area of the Laramide Sierra Madre Oriental fold-thrust belt in Hidalgo and San Luis Potosí States is consistent with that of the other zones. However, wellbore elongations were recorded less frequently and show a rather large circular variance, which suggests that

  14. [Not Available].

    PubMed

    Vizuet Vega, Norma Isela; Shamah Levy, Teresa; Gaona Pineda, Elsa Berenice; Cuevas Nasu, Lucía; Méndez Gómez-Humarán, Ignacio

    2016-01-01

    Introducción: la anemia es un factor de riesgo en la población infantil con consecuencias graves para su crecimiento y desarrollo. Los programas de ayuda alimentaria pueden contribuir a su prevención y control. Objetivo: estudiar la adherencia al consumo de suplementos y su relación con la prevalencia de anemia en niños menores de tres años de edad en San Luis Potosí, México beneficiarios del programa PROSPERA.Métodos: se realizó un análisis comparativo en niños de 12 a 36 meses que consumen diferentes suplementos alimenticios: 414 pertenecientes al grupo de intervención y 334 al de comparación. Se midió la hemoglobina (Hb) por Hemocue clasificando como anémicos a quienes tuvieron valores <110 g/l. Se aplicaron pruebas de t de Student y X2. Se estimaron efectos de intervención mediante el método de diferencias en diferencias y un puntaje de adherencia al consumo de suplementos.Resultados: al final del estudio la prevalencia de anemia disminuyó 11.2 pp en el grupo de intervención y 8.7 pp en el de comparación; la interacción del puntaje de adherencia por suplemento y etapa de observación mostró que la adherencia al consumo de Bebida láctea + Vitaniño reduce el riesgo de presentar anemia (p = 0,14). El consumo de Nutrisano + Vitaniño se asoció con menor riesgo (0,2), ambos con respecto al consumo de Nutrisano.Conclusiones: el programa PROSPERA tuvo efectos importantes en la disminución de las prevalencias de anemia. Se recomienda llevar a cabo acciones para mejorar la adherencia al consumo de suplementos alimenticios, a fIn de mejorar la efectividad de los programas. PMID:27571648

  15. Mercury Production and Use in Colonial Andean Silver Production: Emissions and Health Implications

    PubMed Central

    Hagan, Nicole A.

    2012-01-01

    Background: Colonial cinnabar mining and refining began in Huancavelica, Peru, in 1564. With a local source of mercury, the amalgamation process was adopted to refine silver in Potosí, Bolivia, in the early 1570s. As a result, large quantities of mercury were released into the environment. Objectives: We used archival, primary, and secondary sources to develop the first estimate of mercury emissions from cinnabar refining in Huancavelica and to revise previous estimates of emissions from silver refining in Potosí during the colonial period (1564–1810). Discussion: Although other estimates of historical mercury emissions have recognized Potosí as a significant source, Huancavelica has been overlooked. In addition, previous estimates of mercury emissions from silver refining under-estimated emissions because of unrecorded (contra-band) production and volatilization of mercury during processing and recovery. Archival descriptions document behavioral and health issues during the colonial period that are consistent with known effects of mercury intoxication. Conclusions: According to our calculations, between 1564 and 1810, an estimated 17,000 metric tons of mercury vapor were emitted from cinnabar smelting in Huancavelica, and an estimated 39,000 metric tons were released as vapor during silver refining operations in Potosí. Huancavelica and Potosí combined contributed > 25% of the 196,000 metric tons of mercury vapor emissions in all of Latin America between 1500 and 1800. The historical record is laden with evidence of mercury intoxication consistent with effects recognized today. Our estimates serve as the foundation of investigations of present-day contamination in Huancavelica and Potosí resulting from historical emissions of mercury. PMID:22334094

  16. 5. SOUTHWEST AND SOUTHEAST ELEVATIONS, SOUTH PORTAL, SHOWING BOX ENCLOSING ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    5. SOUTHWEST AND SOUTHEAST ELEVATIONS, SOUTH PORTAL, SHOWING BOX ENCLOSING VALVES. VIEW TO NORTH. - Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

  17. 23. CUESTA TUNNEL, PORTAL STRUCTURES. Leeds, Hill, Barnard & Jewett ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. CUESTA TUNNEL, PORTAL STRUCTURES. Leeds, Hill, Barnard & Jewett drawing, no number, revised 10/10/41. - Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

  18. 13. GROOVED FOOTING (CONSTRUCTION KEY) EXTENDING ABOVE CEMENT FLOOR IN ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    13. GROOVED FOOTING (CONSTRUCTION KEY) EXTENDING ABOVE CEMENT FLOOR IN FIRST UNLINED SECTION BEYOND SOUTH PORTAL. - Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

  19. 22. TRANSMISSION MAIN, PLAN AND PROFILE, INDEX SHEET. Leeds, Hill, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. TRANSMISSION MAIN, PLAN AND PROFILE, INDEX SHEET. Leeds, Hill, Barnard & Jewett drawing, no date, no number. - Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

  20. 78 FR 78993 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-27

    ...-B-1239, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation....gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management Branch, Federal... (SRP) is available to communities in support of the appeal resolution process. SRPs are...

  1. The Art and Craft of Science

    ERIC Educational Resources Information Center

    Root-Bernstein, Robert; Root-Bernstein, Michele

    2013-01-01

    Walter Alvarez, a doctor and physiologist of some renown, decided to send his scientifically talented son, Luis, to an arts and crafts school where Luis took industrial drawing and woodworking instead of calculus. Luis Alvarez won the Nobel Prize in physics in 1968. Einstein was certainly not a standout in his mathematics and physics classes. Yet…

  2. 78 FR 36222 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-17

    ... Street, Plymouth, MA 02360. Town of Scituate Town Hall, 600 Chief Justice Cushing Highway, Scituate, MA..., identified by Docket No. FEMA-B-1326, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... (email) Luis.Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez,...

  3. Comment on ``Model of ionic charge states of impulsive solar energetic particles in solar flares'' by M. Dolores Rodríguez-Frías, Luis del Peral, and Jorge Pérez-Peraza

    NASA Astrophysics Data System (ADS)

    Kovaltsov, Gennadi A.; Kartavykh, Yulia Y.; Kocharov, Leon; Ostryakov, Valery M.; Torsti, Jarmo

    2002-10-01

    Attention is drawn to the fact that the numerical code ESCAPE by [2001] is in conflict with other models of charge-changing processes in solar corona, including the most reliable model by [1992]. We find in the >0.1 MeV nucleon-1 energy range a tendency of the ESCAPE code to overestimate the ionic charge of iron. This implies an underestimation of the density × acceleration-time product in the ion acceleration region in solar corona.

  4. Variant form of angina pectoris: its clinical features and treatment. The 185th Luis Guerrero Memorial Lecture given at the 6th Paul Dudley White Session, University of Santo Tomas, Manila, The Philippines, January 24, 1979.

    PubMed

    Kimura, E

    1980-01-01

    The variant form of angina pectoris (VA) is a rather common disease in Japan, and the author himself is suffering from it. Among 100 successive cases of various types of angina seen in our Department, excluding myocardial infarction and post-infarctional angina, 23 cases were VA. The brief duration, cyclic occurrence and frequent incidence of the attacks at night are considered to be the clinical characteristics. The pathogenesis of VA is ascribed to coronary spasm on the basis of findings made in cinecoronary arteriography. ST elevation was observed more frequently on exercise test in VA than in ordinary exertional angina pectoris, indicating that patients with VA are in a markedly spasmophilic state. Although the prognosis is not generally so serious, 33 out of 50 cases of VA had arrhythmias during attacks, including such serious ones as advanced AV block and ventricular fibrillation. Nifedipine was dramatically effective in suppressing repeatedly occurring ventricular fibrillation. A survey of the effects of calcium antagonists in 243 cases of VA in 11 cardiology institutes throughout Japan revealed that these drugs were effective in more than 90% of the cases. Of particular note is the fact that the attacks were completely eliminated in more than 80% of the cases.

  5. Biological assessment of the effects of activities conducted at Camp Roberts Army National Guard training site, Monterey and San Luis Obispo Counties, California, on the endangered san joaquin kit fox, Vulpes macrotis mutica

    SciTech Connect

    Not Available

    1989-12-01

    Section 7 of the Endangered Species Act of 1973 imposes several requirements on federal agencies concerning listed threatened and endangered species and their designated critical habitat. Camp Roberts is operated by the California Army National Guard (CA ARNG) with funding from the National Guard Bureau (NGB). Its primary mission to provide a site where military training requirements of the western United States can be met. The presence of the endangered San Joaquin kit fox (Vulpes macrotis mutica) was confirmed in 1960 and the distribution and abundance of the species increased over the next two decades. The Secretary of Interior has not designated any critical habitat for San Joaquin kit fox. The major objective of this Biological Assessment is to provide FWS with sufficient information concerning the possible impacts that routine military training, maintenance and repair activities, and proposed construction projects may have on the San Joaquin kit fox and its essential habitat at Camp Roberts so that formal consultation with NGB and CA ARNG can begin. FWS will use this information as part of the basis for issuing a Biological Opinion which will include an incidental take provision. 45 refs., 8 figs., 1 tab.

  6. PREFACE: Collapse Calderas Workshop

    NASA Astrophysics Data System (ADS)

    Gottsmann, Jo; Aguirre-Diaz, Gerardo

    2008-10-01

    (IAVCEI), the International Union of Geodesy and Geophysics (IUGG), the Universidad Nacional Autónoma de México (UNAM) through the Coordinación de la Investigación Científica, the Institute of Physics Publishing services, the Consejo Nacional de Ciencia y Tecnología de Querétaro (CONCYTEQ). The workshop represented the key activity of the IAVCEI Commission on Collapse Calderas in 2008. We, the workshop organizers, would like to express our gratitude to all workshop participants, the staff of Misión La Muralla, the Centro de Geociencias of UNAM for administrative and logistic support, to Adelina Geyer for web support, to María Inés Rojano for organization of logistics, the Universidad Autónoma de San Luis Potosí for logistics support, the Comisiòn Nacional de Electricidad for authorizing a visit to Los Azufres geothermal field, and to all sponsors that provided financial support. We expect these proceedings to stimulate further fruitful discussions, which we hope will be continued at a future meeting. Jo Gottsmann and Gerardo Aguirre-Diaz October 2008

  7. 76 FR 33337 - Endangered Species Recovery Permit Applications

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-08

    ... (capture, handle, and release) the Stephens' kangaroo rat (Dipodomys stephensi) in conjunction with surveys... of Land Management in Santa Barbara, San Luis Obispo, Tulare, Kings, Fresno, and Kern...

  8. 34. Photocopy of photograph (from California State Library, Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    34. Photocopy of photograph (from California State Library, Sacramento) Photographer unknown, Date unknown INTERIOR, PULPIT - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  9. 78 FR 20339 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-04

    ... Docket No. FEMA-B-1301, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and....Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management...=2 New Orleans/Orleans Parish Orleans Parish Civil District Courthouse, 421 Loyola Avenue, Suite...

  10. 78 FR 14584 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-06

    ... Docket No. FEMA-B-1296, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and....Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management.../RegionI/BristolCountyMAcoastal/Preliminary%20Maps/Forms/AllItems.aspx City of Fall River City Hall,...

  11. 78 FR 14578 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-06

    ... Docket No. FEMA-B-1299, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and....Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management... Jackson Street, Brooklyn, IA 52211. City of Deep River City Hall, 701 Main Street, Deep River, IA...

  12. 21. CHAINAGE FROM SALINAS DAM TO NORTH PORTAL, STATIONS. Leeds, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. CHAINAGE FROM SALINAS DAM TO NORTH PORTAL, STATIONS. Leeds, Hill, Barnard & Jewett drawing, no date, no number, title block partially obscured. - Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

  13. Photocopy of photograph (original 35 millimeter negative in possession of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of photograph (original 35 millimeter negative in possession of Luis Pumarada, San German, Puerto Rico). Luis Pumarada, Photographer, September 4, 1989. PUENTE RIO HONDO, DOMED PLATE DECK FROM BELOW. - Puente Rio Hondo, Spanning Hondo River on PR Road 156, Barrio Rio Hondo, Comerio, Comerio Municipio, PR

  14. Photocopy of photograph (original 35 millimeter negative in possession of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of photograph (original 35 millimeter negative in possession of Luis Pumarada, San German, Puerto Rico). Luis Pumarada, Photographer, September 4, 1989. PUENTE RIO HONDO, VIEW OF SOUTH ABUTMENT. - Puente Rio Hondo, Spanning Hondo River on PR Road 156, Barrio Rio Hondo, Comerio, Comerio Municipio, PR

  15. Photocopy of photograph (original 35 millimeter negative in possession of ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Photocopy of photograph (original 35 millimeter negative in possession of Luis Pumarada, San German, Puerto Rico). Luis Pumarada, Photographer, September 4, 1989. PUENTE RIO HONDO, VIEW FROM SOUTHWEST. - Puente Rio Hondo, Spanning Hondo River on PR Road 156, Barrio Rio Hondo, Comerio, Comerio Municipio, PR

  16. 76 FR 73534 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-29

    ..., identified by Docket No. FEMA-B-1230, to Luis Rodriguez, Chief, Engineering Management Branch, Federal...: Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration..., Civil Justice Reform. This proposed rule meets the applicable standards of Executive Order 12988....

  17. 77 FR 25495 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-30

    ... Docket No. FEMA-B-1250, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and....Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management... Livermore Falls Town Office, 2 Main Street, Livermore Falls, ME 04254. Town of Mechanic Falls Town...

  18. Main interior space facing south toward the ocean. Original scissor ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    Main interior space facing south toward the ocean. Original scissor trusses and deck roof are visible at the top. Octagonal window with large picture windows face the ocean. - San Luis Yacht Club, Avila Pier, South of Front Street, Avila Beach, San Luis Obispo County, CA

  19. 78 FR 20341 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-04

    ... Docket No. FEMA-B-1303, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and....Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management... resolution process. SRPs are independent panels of experts in hydrology, hydraulics, and other...

  20. 78 FR 8179 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-05

    ... Docket No. FEMA-B-1284, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and....Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management... (SRP) is available to communities in support of the appeal resolution process. SRPs are...

  1. 78 FR 20344 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-04

    ... Docket No. FEMA-B-1300, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and....Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management... (SRP) is available to communities in support of the appeal resolution process. SRPs are...

  2. 78 FR 8181 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-05

    ... Docket No. FEMA-B-1281, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and....Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management... (SRP) is available to communities in support of the appeal resolution process. SRPs are...

  3. 78 FR 20343 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-04-04

    ... Docket No. FEMA-B-1304, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and....Rodriguez3@fema.dhs.gov . FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management... (SRP) is available to communities in support of the appeal resolution process. SRPs are...

  4. 76 FR 46898 - Quarterly Publication of Individuals, Who Have Chosen To Expatriate, as Required by Section 6039G

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-03

    ... ALEX LEUNG ANDRE WAI KIM LEUNG DANSON LEUNG PUI YIN LEUNG TAT YAN LEVETT GINA ANNA MARIA LI GUOJI LI... LOSADA RODRIGO LOW BLIGH KEE WAI LOWTHER CAMILLA ANN ] LU CHIA AO WILLIAM LUI EILEEN WAI LING LUI PETER... NEUMAN YVONNE T. H. NG KAR FAI JEFFREY NG VICTORIA H NICHOLL COLIN RICHARD NIEDERHAEUSERN- MARLENE...

  5. Solid Geometry in the Works of an Iron Artisan

    ERIC Educational Resources Information Center

    Castro, Fernando

    2003-01-01

    The author shares a story of how Luis González, an iron artisan, helped the author build a wooden and iron toy truck. The knowledge required to build the skeleton for the parallelepiped in the construction of the truck is not in the mathematical high school curriculum in Venezuela. Although Luis never received a degree beyond high school,…

  6. 77 FR 11084 - Intent To Prepare a Draft Environmental Impact Statement/Environmental Impact Report for the...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-24

    ...), including waste water treatment and related facilities and water supply, storage, treatment, and.../ Environmental Impact Report for the Proposed Cambria Water Supply Project, San Luis Obispo County, CA AGENCY... implement a project to provide for a reliable water supply for the community of Cambria in San Luis...

  7. 20. GEOLOGY, PLAN AND PROFILE, SHOWING LINED AND UNLINED SECTIONS, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. GEOLOGY, PLAN AND PROFILE, SHOWING LINED AND UNLINED SECTIONS, AND DETAILED TYPICAL CROSS SECTIONS. Leeds, Hill, Barnard & Jewett drawing, no number, revised 3-20-42. - Salinas River Project, Cuesta Tunnel, Southeast of U.S. 101, San Luis Obispo, San Luis Obispo County, CA

  8. 76 FR 31977 - Notice of Intent To Prepare an Environmental Impact Statement for Domestic Sheep Grazing...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-06-02

    ... Sheep Grazing Allotments for Term Grazing Permit Renewals in the Southern San Luis Valley, CO AGENCY... sheep grazing permits on 12 allotments and 1 cattle grazing allotment in the southern San Luis Valley.... SUPPLEMENTARY INFORMATION: Term permits on 12 sheep grazing and 1 cattle grazing allotments located in...

  9. View of the main interior space facing east. The main ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    View of the main interior space facing east. The main entry is on the left hand side at the rear. The exit to the deck is to the right. - San Luis Yacht Club, Avila Pier, South of Front Street, Avila Beach, San Luis Obispo County, CA

  10. 22. Photocopy of original photo from Corps of Engineers, Los ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Photocopy of original photo from Corps of Engineers, Los Angeles District, 'Report on Salinas Dam, Salinas River, California,' June 15, 1943. (Photographer unknown; report located at City of San Luis Obispo.) CONSTRUCTION PHOTO SHOWING THE STRUTS, POURED TO ALIGN WITH THE RIGHT (WEST) BUTTRESS. - Salinas Dam, Salinas River near Pozo Road, Santa Margarita, San Luis Obispo County, CA

  11. 24. Photocopy of original photo from Corps of Engineers, Los ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Photocopy of original photo from Corps of Engineers, Los Angeles District, 'Report on Salinas Dam, Salinas River, California,' June 15, 1943. (Photographer unknown, report located at City of San Luis Obispo.) SALINAS DAM COMPLETION PHOTO. - Salinas Dam, Salinas River near Pozo Road, Santa Margarita, San Luis Obispo County, CA

  12. 23. Photocopy of original photo from Corps of Engineers, Los ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Photocopy of original photo from Corps of Engineers, Los Angeles District, 'Report on Salinas Dam, Salinas River, California,' June 15, 1943. (Photographer unknown; report located at City of San Luis Obispo.) CONSTRUCTION PHOTO SHOWING CURVED CONCRETE CHUTE SPILLWAY. - Salinas Dam, Salinas River near Pozo Road, Santa Margarita, San Luis Obispo County, CA

  13. 21. Photocopy of original photo from Corps of Engineers, Los ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. Photocopy of original photo from Corps of Engineers, Los Angeles District, 'Report on Salinas Dam, Salinas River, California,' June 15, 1943. (Photographer unknown; report located at City of San Luis Obispo.) SALINAS DAM UNDER CONSTRUCTION IN 1941. - Salinas Dam, Salinas River near Pozo Road, Santa Margarita, San Luis Obispo County, CA

  14. 75 FR 81642 - Long-Term North to South Water Transfer Program, Sacramento County, CA

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-28

    ..., Bureau of Reclamation (Reclamation) and the San Luis & Delta-Mendota Water Authority propose to prepare a... water agencies south of the Sacramento-San Joaquin Delta (Delta) and in the San Francisco Bay Area. The.... Sacramento at the Best Western Expo Inn & Suites, 1413 Howe Avenue. Los Banos at the San Luis &...

  15. Cross-field Current Instability for Substorm Expansions

    NASA Technical Reports Server (NTRS)

    Lui, Anthony

    1997-01-01

    The funding provided by the above-referenced NASA grant has enabled us: (1) to investigate the quasi-linear evolution of the IWI [Lui et al., 1993] and that of the generalized MTSI/IWI [Yoon and Lui, 1993], (2) to carry out the linear analysis of the LHDI to elucidate the difference between it and the MTSI/PM instability [Yoon et al., 1994], (3) to conduct some preliminary nonlocal analyses of the MTSI [Lui et al., 1995] and the IWI [Yoon and Lui, 1996] modes, (4) to study low-frequency shear-driven instability and its nonlinear evolution, which might compete with the CCI [Yoon et al., 1996], and (5) to study the evolution of current sheet during late substorm growth phase by means of 2-D Hall-MHD simulation in order to obtain a better understanding of the current sheet equilibrium crucial for CCI theory [Yoon and Lui, 1997].

  16. EDITORIAL: XIII Mexican Workshop on Particles and Fields

    NASA Astrophysics Data System (ADS)

    Barranco, Juan; Contreras, Guillermo; Delepine, David; Napsuciale, Mauro

    2012-08-01

    is just a set of foundations and a portal, considered national monuments. There, we enjoyed a delicious meal in the cellars of the Corralejo Hacienda before returning to Leon. The XIII MWPF was sponsored by several institutions: Consejo Nacional de Ciencia y Tecnología (CONACyT) through the Red Nacional de Física de Altas Energías and individual research projects, Consejo de Ciencia y Tecnológico del Estado de Guanajuato (CONCyTEG), Universidad de Guanajuato, Universidad Nacional Autónoma de México, Universidad de Guanajuato, Centro de Investigaciones de Estudios Avanzados del IPN (CINVESTAV), Universidad Michoacana de San Nicolás de Hidalgo, Benemérita Universidad Autónoma de Puebla and Universidad Autónoma de San Luis Potosí. Also, we wish to thak to those who helped in the process of getting financial support for the meeting, specially Dr Juan Carlos D'Olivo, President of the Red Nacional de Física de Altas Energías and Dr José Luis Lucio Martínez, Rector of Universidad de Guanajuato, Campus León. These proceedings have been published thanks to the support of PIFI 2011. This meeting was possible due to the commitment of the working groups and we wish to thank to their members for the decisive collaboration with the organizing committee. At the local level, we thank our graduate students: Carolina Luján, Vannia González, Selim Gomez and Carlos Alberto Vaquera for their invaluable contribution in the organization of the large amount of small but important things around the meeting. Finally, we would like to thank all the speakers for delivering excellent talks which contributed to the success of the event. We are also grateful to all the participants for the nice academic and social atmosphere during the meeting and for providing their write-ups on time. The National organizing committee was formed by Arnulfo Zepeda (CINVESTAV-DF) Guillermo Contreras (CINVESTAV-Mérida) David Delepine (DF-UG) Axel de la Macorra (IAC/IF-UNAM) Lorenzo Díaz (BUAP

  17. Reassessing the Aurignacian of Slovenia: techno-economic behaviour and direct dating of osseous projectile points.

    PubMed

    Moreau, Luc; Odar, Boštjan; Higham, Tom; Horvat, Aleksander; Pirkmajer, Darja; Turk, Peter

    2015-01-01

    The Palaeolithic of southern Central Europe has a long history of archaeological research. Particularly, the presence of numerous osseous projectile points in many early Upper Palaeolithic (EUP) assemblages in this region has attracted the attention of the international research community. However, the scarcity of properly identified and well-dated Aurignacian contexts represents an obstacle for investigation of the nature and timing of the Middle to Upper Palaeolithic transition. In this context, the question of whether Neandertals made Aurignacian osseous projectile points, either on their own or as a consequence of cultural interaction with anatomically modern humans (AMH), still remains an open issue. Here we reassess the EUP record of Slovenia by evaluating the Aurignacian character of the assemblages from Potočka zijalka, Mokriška jama and Divje babe I in the light of their suggested roots in the local Mousterian. We provide a comprehensive description of the lithic industry from Potočka zijalka, which represents one of the rare EUP assemblages of southern Central Europe with a representative number of lithic artefacts to be analysed from the perspective of lithic technology and raw material economy. Our re-analysis of the Slovenian assemblages is backed by a series of 11 new ultrafiltered collagen 14C dates obtained directly on associated osseous projectile points from the studied assemblages. The Aurignacian of Potočka zijalka underlines the remarkable consistency of the Early Aurignacian with low typo-technological variability across Europe, resulting from a marked dependence on transported toolkits and raw material conservation. The new radiocarbon determinations for the Aurignacian of Slovenia appear to post-date the 34-32 ka BP (thousands of years before present) threshold for the last Neandertals in the region. Although not falsified, the hypothesis of Aurignacian bone tools in southern Central Europe as a product of late Neandertals is not

  18. 77 FR 66791 - Proposed Flood Elevation Determinations for Wicomico County, MD, and Incorporated Areas

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-07

    ... proposed rulemaking at 75 FR 5909, proposing flood elevation determinations along one or more flooding..., identified by Docket No. FEMA-B- 1085, to Luis Rodriguez, Chief, Engineering Management Branch,...

  19. 75 FR 3786 - Unblocking of Specially Designated Nationals and Blocked Persons Pursuant to Executive Order 12978

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-01-22

    ... Emergency Economic Powers Act (50 U.S.C. 1701-1706) (``IEEPA''), issued Executive Order 12978 (60 FR 54579... INMOBILIARIA PASADENA LTDA., Cartago, Valle, Colombia; c/o ORGANIZACION LUIS HERNANDO GOMEZ BUSTAMANTE Y CIA....

  20. 75 FR 12000 - Unblocking of Specially Designated Nationals and Blocked Persons

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-03-12

    ... Emergency Economic Powers Act (50 U.S.C. 1701-1706) (``IEEPA''), issued Executive Order 12978 (60 FR 54579... property were blocked pursuant to the Order: 1. GOMEZ JARAMILLO, Luis Fernando, c/o INMOBILIARIA U.M.V....

  1. 78 FR 6745 - Final Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-31

    ... CONTACT: Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation... 12866 of September 30, 1993, Regulatory Planning and Review, 58 FR 51735. Executive Order 13132... 13132. Executive Order 12988, Civil Justice Reform. This final rule meets the applicable standards...

  2. 77 FR 74610 - Final Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-17

    ... CONTACT: Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation... 12866 of September 30, 1993, Regulatory Planning and Review, 58 FR 51735. Executive Order 13132... 13132. Executive Order 12988, Civil Justice Reform. This final rule meets the applicable standards...

  3. 78 FR 6743 - Final Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-31

    ... CONTACT: Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation... 12866 of September 30, 1993, Regulatory Planning and Review, 58 FR 51735. Executive Order 13132... 13132. Executive Order 12988, Civil Justice Reform. This final rule meets the applicable standards...

  4. The Author and His Works

    ERIC Educational Resources Information Center

    Spain Today, 1971

    1971-01-01

    Works of Emilio Garcia Gomez, Dario Fernandez Florez, Armando Lopez Salinas, Jaime de Arminan, Luis Lopez Anglada, and Carmen Bravo Villasante are analyzed in this continuing series on Spanish authors. (DS)

  5. 75 FR 77598 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-13

    ..., identified by Docket No. FEMA-B-1167, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal..., Environmental Consideration. An environmental impact assessment has not been prepared. Regulatory...

  6. 33 CFR 80.845 - Galveston, TX to Freeport, TX.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... formed by the centerline of the highway bridge over San Luis Pass. (c) Lines formed by the centerlines of the highway bridges over the inlets to Christmas Bay (Cedar Cut) and Drum Bay. (d) A line drawn...

  7. 33 CFR 80.845 - Galveston, TX to Freeport, TX.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... formed by the centerline of the highway bridge over San Luis Pass. (c) Lines formed by the centerlines of the highway bridges over the inlets to Christmas Bay (Cedar Cut) and Drum Bay. (d) A line drawn...

  8. 33 CFR 80.845 - Galveston, TX to Freeport, TX.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... formed by the centerline of the highway bridge over San Luis Pass. (c) Lines formed by the centerlines of the highway bridges over the inlets to Christmas Bay (Cedar Cut) and Drum Bay. (d) A line drawn...

  9. 76 FR 5856 - California Disaster #CA-00164

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-02-02

    ..., San Diego, San Luis Obispo, Santa Barbara, Tulare. The Interest Rates are: Percent For Physical Damage... is 12457B (Catalog of Federal Domestic Assistance Numbers 59002 and 59008) James E. Rivera,...

  10. 17. Photocopy of photograph (from Mr. William H. Knowles Collection, ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    17. Photocopy of photograph (from Mr. William H. Knowles Collection, 1936) Photographer unknown, Date unknown VIEW OF EXTERIOR, 1936 - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  11. 25. Photocopy of photograph (from California State Library, Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    25. Photocopy of photograph (from California State Library, Sacramento) Photographer unknown, Date unknown DETAIL OF ARCHES - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  12. 30. Photocopy of photograph (from William H. Knowles Collection) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    30. Photocopy of photograph (from William H. Knowles Collection) Photographer unknown, Date unknown VIEW OF NORTH & WEST WALLS OF CHURCH - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  13. 27. Photocopy of photograph (from Mr. William H. Knowles Collection) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    27. Photocopy of photograph (from Mr. William H. Knowles Collection) Photographer unknown, Date unknown VIEW OF NORTHEAST CORNER OF QUADRANGLE - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  14. 24. Photocopy of photograph (from California State Library, Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    24. Photocopy of photograph (from California State Library, Sacramento) Photographer unknown, Date unknown VIEW OF EXTERIOR ARCHES FROM AN ANGLE - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  15. 35. Photocopy of photograph (from California State Library, Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    35. Photocopy of photograph (from California State Library, Sacramento) Photographer unknown, Date unknown INTERIOR OF CHURCH - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  16. 22. Photocopy of photograph (from San Francisco Chronicle Collection) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    22. Photocopy of photograph (from San Francisco Chronicle Collection) Photographer unknown, Date unknown SIDE VIEW OF CHURCH - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  17. 23. Photocopy of photograph (From William H. Knowles Collection, 1936) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    23. Photocopy of photograph (From William H. Knowles Collection, 1936) Photographer unknown, Date unknown SIDE VIEW OF COMPLEX FROM A DISTANCE - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  18. 26. Photocopy of photograph (from California State Library, Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    26. Photocopy of photograph (from California State Library, Sacramento) Photographer unknown, Date unknown CLOSE-UP OF ARCHES - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  19. 21. Photocopy of photograph (from Mr. William H. Knowles Collection) ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    21. Photocopy of photograph (from Mr. William H. Knowles Collection) Photographer unknown, Date unknown CLOSE-UP OF REAR OF CHURCH - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  20. 32. Photocopy of photograph (from California State Library, Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    32. Photocopy of photograph (from California State Library, Sacramento) Photographer unknown, Date unknown SOUTH END OF CORRIDOR - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  1. 33. Photocopy of photograph (from California State Library. Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    33. Photocopy of photograph (from California State Library. Sacramento) Photographer unknown, Date unknown DETAIL OF SOUTH END OF CORRIDOR - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  2. 28. Photocopy of photograph (from California State Library, Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    28. Photocopy of photograph (from California State Library, Sacramento) Photographer unknown, Date unknown NORTHEAST CORNER OF COMPLEX - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  3. 20. Photocopy of photograph (From Frances Rand Smith Collection, California ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    20. Photocopy of photograph (From Frances Rand Smith Collection, California Historical Society) Photographer unknown, Date unknown VIEW OF CHURCH FROM REAR - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  4. 29. Photocopy of photograph (from California State Library, Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    29. Photocopy of photograph (from California State Library, Sacramento) Photographer unknown, Date unknown DETAIL OF NORTHEAST CORNER - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  5. 36. Photocopy of photograph (from California State Library, Sacramento) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    36. Photocopy of photograph (from California State Library, Sacramento) Photographer unknown, Date unknown INTERIOR OF CHURCH, LOOKING TOWARD THE FRONT - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  6. 31. Photocopy of photograph (from William H. Knowles Collection) Photographer ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    31. Photocopy of photograph (from William H. Knowles Collection) Photographer unknown, Date unknown REAR AND NORTH WALL OF CHURCH AND OLD INDIAN CEMETERY - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  7. 16. Photocopy of photograph (from Frances Rand Smith Collection, California ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    16. Photocopy of photograph (from Frances Rand Smith Collection, California Historical Society, 1900) Photographer unknown, Date unknown FRONT VIEW OF MISSION, c. 1900 - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  8. 15. Photocopy of photograph (from California State Library, Sacramento, c. ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    15. Photocopy of photograph (from California State Library, Sacramento, c. 1890) Photographer unknown, Date unknown VIEW OF CHURCH FROM AN ANGLE, c. 1890 - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  9. 76 FR 1425 - Combined Notice of Filings #1

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-10

    ... Project LLC, Klondike Wind Power II LLC, Leaning Juniper Wind Power II LLC, Iberdrola Renewables, Inc., San Luis Solar LLC. Description: Triennial Market Power Analysis of the IRI MBR Companies for...

  10. ISS Update: EarthKAM Participants

    NASA Video Gallery

    NASA Public Affair Officer Brandi Dean talks with Frank Sanchez, a teacher, and Luis Tamayo, student, on their experience with using EarthKAM to capture images of Earth from the International Space...

  11. 78 FR 17414 - Risk Communications Advisory Committee; Notice of Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-03-21

    ... HUMAN SERVICES Food and Drug Administration Risk Communications Advisory Committee; Notice of Meeting... the public. Name of Committee: Risk Communications Advisory Committee. General Function of the...: Luis G. Bravo, Designated Federal Officer, Risk Communication Staff, Office of Planning, Food and...

  12. 78 FR 757 - Notice of the Joint Colorado Resource Advisory Council Meeting

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-01-04

    ... Garden Park Fossil Area and an update on solar energy development in the San Luis Valley. Dated: December...-Grouse Environmental Impact Statement (EIS), the Draft White River Field Office RMP Amendment and...

  13. Art

    ERIC Educational Resources Information Center

    Spain Today, 1973

    1973-01-01

    Discusses works of Joan Miro, Angel Medina, Felix Adelantado, Meki Megara, Ramon Calderon, and Luis Hernandez Cruz. The Last portion examines a show by painters and sculptors whose common subject is the bull. (SK)

  14. 19 CFR 122.153 - Limitations on airport of entry or departure.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... International Airport. Pittsburgh, Pennsylvania Pittsburgh International Airport. San Juan, Puerto Rico San Juan Luis Muñoz Marín International Airport. Tampa, Florida Tampa International Airport. West Palm Beach, Florida Palm Beach International Airport....

  15. 77 FR 2606 - Unblocking of Specially Designated Nationals and Blocked Persons Pursuant to Executive Order 12978

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-01-18

    ... Emergency Economic Powers Act (50 U.S.C. 1701-1706) (``IEEPA''), issued Executive Order 12978 (60 FR 54579... OVERSEAS INC., Panama City, Panama; c/o FINANZAS DEL NORTE LUIS SAIEH Y CIA. S.C.A., Barranquilla, Colombia... (Panama) 10. FINANZAS DEL NORTE LUIS SAIEH Y CIA. S.C.A. (f.k.a. FINANZAS DEL NORTE LTDA.), Calle 77 B...

  16. Effects of habitat structure and land-use intensity on the genetic structure of the grasshopper species Chorthippus parallelus

    PubMed Central

    Wiesner, Kerstin R.; Habel, Jan Christian; Gossner, Martin M.; Loxdale, Hugh D.; Köhler, Günter; Schneider, Anja R. R.; Tiedemann, Ralph; Weisser, Wolfgang W.

    2014-01-01

    Land-use intensity (LUI) is assumed to impact the genetic structure of organisms. While effects of landscape structure on the genetics of local populations have frequently been analysed, potential effects of variation in LUI on the genetic diversity of local populations have mostly been neglected. In this study, we used six polymorphic microsatellites to analyse the genetic effects of variation in land use in the highly abundant grasshopper Chorthippus parallelus. We sampled a total of 610 individuals at 22 heterogeneous grassland sites in the Hainich-Dün region of Central Germany. For each of these grassland sites we assessed habitat size, LUI (combined index of mowing, grazing and fertilization), and the proportion of grassland adjoining the sampling site and the landscape heterogeneity (the latter two factors within a 500 m buffer zone surrounding each focal site). We found only marginal genetic differentiation among all local populations and no correlation between geographical and genetic distance. Habitat size, LUI and landscape characteristics had only weak effects on most of the parameters of genetic diversity of C. parallelus; only expected heterozygosity and the grasshopper abundances were affected by interacting effects of LUI, habitat size and landscape characteristics. The lack of any strong relationships between LUI, abundance and the genetic structure might be due to large local populations of the species in the landscape, counteracting local differentiation and potential genetic drift effects. PMID:26064535

  17. Climatic and tectonic implications of the late Miocene Jakokkota flora, Bolivian Altiplano

    NASA Astrophysics Data System (ADS)

    Gregory-Wodzicki, Kathryn M.; McIntosh, W. C.; Velasquez, Kattia

    1998-12-01

    When compared to a database of modern foliar physiognomy and climate, the physiognomy of a new collection of dicotyledonous leaves from the 10.66±0.06 Ma Jakokkota flora, Bolivian Altiplano, implies a mean annual temperature (MAT) of 18.6-21.0±2.5°C. Similarly, a literature-derived sample of the early-middle Miocene Potosı´flora, Cordillera Oriental, implies a MAT of 21.5-21.7±2.1°C. We estimate that both floras experienced a growing season precipitation of 50±40 cm. The paleoclimate thus appears considerably warmer than the current highland climate, with MATs of 8-9°C; the paleoprecipitation is indistinguishable from modern levels. A comparison of the Miocene MATs with the modern MATs, with the effects of latitudinal continental drift and global climate change subtracted, suggests that the Jakokkota flora grew at an elevation of 590-1610±1000 m, and the Potosı´flora grew at an elevation of 0-1320±1000 m. Both paleoelevation estimates are significantly lower than the present elevations of 3940 and 4300 m, respectively, requiring a substantial component of Andean uplift since 10.7 Ma. This uplift history is consistent with two-stage tectonic models of Andean orogeny.

  18. Modeling land use interaction using linguistic variables

    NASA Astrophysics Data System (ADS)

    Karimi, Mohammad; Sharifi, Mohammad Ali; Mesgari, Mohammad Saadi

    2012-06-01

    One of the main factors of land use change (LUC) modeling is the land use intersection (LUI) or neighborhood effect, which is normally modeled using cellular automata (CA) concept. The effects of LUI over distance are represented in terms of CA transition rules. In this paper, a new model for LUI process is developed that makes use of expert knowledge to define the transition rules. In this model, the region of influence is defined using a new radial structure; the transition rules are described by expert knowledge and spatial metrics in the form of linguistic variables; and finally, the neighborhood effect is classified into three groups of compactness, dependency and incompatibility. The model is implemented and evaluated using the data of Borkhar and Meymeh township, in Esfahan, Iran, for the two periods of 1986-1998 and 1998-2005. The results show that the model and its related concept are performing rather well.

  19. Natural convective mixing flows

    NASA Astrophysics Data System (ADS)

    Ramos, Eduardo; de La Cruz, Luis; del Castillo, Luis

    1998-11-01

    Natural convective mixing flows. Eduardo Ramos and Luis M. de La Cruz, National University of Mexico and Luis Del Castillo San Luis Potosi University. The possibility of mixing a fluid with a natural convective flow is analysed by solving numerically the mass, momentum and energy equations in a cubic container. Two opposite vertical walls of the container are assumed to have temperatures that oscillate as functions of time. The phase of the oscillations is chosen in such a way that alternating corrotating vortices are formed in the cavity. The mixing efficiency of this kind of flow is examined with a Lagrangian tracking technique. This work was partially financed by CONACyT-Mexico project number GE0044

  20. Historical Earthquakes And Their Geologic Signature On The Guerrero, Mexican Pacific Coast

    NASA Astrophysics Data System (ADS)

    Ramírez Herrera, M.; Rangel, V.; Kostoglodov, V.; Ruíz-Fernández, A.; Machain, M.; Caballero, M.; Goguitchaichrili, A.

    2012-12-01

    Historical, ethnographic and instrumental data show that the Pacific coast of Mexico has been exposed to destructive tsunamis over at least the past 500 years. This coast parallels the active Mexican subduction zone, where earthquakes M > 8 have been registered and are known to have triggered tsunamis. The purpose of our study was two-fold, a) to determine whether we could distinguish the geologic signature of historical earthquakes, and b) whether tsunami deposits are preserved in the tropical environments of the Barra de Potosí Bay, Guerrero coast. Multiple sites were dug and cores recovered to determine the presence, continuity and extension of a sharp basal contact between a clayish silt unit and a sand unit. The trench, pit, and monolith at Barra de Potosí yield a similar stratigraphy. Several lines of evidence using a multi-proxy approach (historical studies, interviews with local witnesses, geomorphological and geological surveys, coring and trenching, and laboratory analyses including grain size, micropaleontology, geochemistry, magnetic susceptibility and radiometric dating - Pb-210 and C-14) indicate the occurrence of two earthquakes that we link to local events: the 1985 (M 8.1) Mexico and possibly the 1907 (M 8.3) earthquake. No conclusive evidence of tsunami deposits were recognized, however an anomalous sand layer with incorporated mud clasts, shallow marine foraminifera, and the presence of organic debris in this sand bed suggests a mixture of terrestrial influence associated with the inland transport of high-energy marine material most likely from a nearshore beach environment. The radiocarbon dates provide a minimum age i.e. the maximum estimate for the period of burial of the plant material in the lower observed sand layer of ca. 2320-2050 cal yr BP (Cal BC 370 to 100). We thereby provide onshore geological evidence of historical coseismic deformation and possibly a tsunami on the Pacific coast of Mexico.

  1. 77 FR 73396 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-10

    ... provides corrections to that table, to be used in lieu of the information published at 75 FR 29219. The... buildings. Corrections In the proposed rule published at 75 FR 29219, in the May 25, 2010, issue of the... may submit comments, identified by Docket No. FEMA-B- 1089, to Luis Rodriguez, Chief,...

  2. An Ethnographic Intervention Using the Five Characteristics of Effective Teacher Professional Development

    ERIC Educational Resources Information Center

    Patahuddin, Sitti Maesuri

    2010-01-01

    This paper is aimed to describe an ethnographic intervention study of supporting a Low Use Internet (LUI) teacher to use the Internet for his professional development. Five characteristics of effective professional development were identified and applied. This description is followed by a reflection on the process to get a deeper insight about…

  3. Nemachtilli: The Spirit of Learning

    ERIC Educational Resources Information Center

    Rodriguez, Luis J.

    2005-01-01

    Luis J. Rodriguez believes that the spirit of learning is not nurtured or encouraged in schools because the spirit of teaching is absent. Learning is not just about books but it happens in all kind of ways that should be nurtured with spirit.

  4. Friendly Spaces.

    ERIC Educational Resources Information Center

    D'Elia, William

    1996-01-01

    The creation of usable space for gatherings and socializing is an important consideration in any campus planning program. The University of California-San Diego has a large outdoor assembly area. An addition at Cal Poly-San Luis Obispo encompasses an existing pedestrian path. A new building at the University of Alaska, Fairbanks, is designed as a…

  5. 77 FR 66457 - Combined Notice of Filings #2

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-05

    ..., Providence Heights Wind, LLC, Rugby Wind LLC, San Luis Solar LLC, Shiloh I Wind Project, LLC, South Chestnut... following electric corporate filings: Docket Numbers: EC13-24-000. Applicants: Stony Creek Wind Farm, LLC... Filing Requirements, Expedited Consideration and Confidential Treatment of Stony Creek Wind Farm,...

  6. 77 FR 5007 - Combined Notice of Filings #2

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-02-01

    ... LLC, Twin Buttes Wind LLC, Manzana Wind LLC, Blue Creek Wind Farm LLC, San Luis Solar LLC, Elk River.... Applicants: Klondike Wind Power III LLC, Northern Iowa Windpower II LLC, Big Horn Wind Project LLC, Colorado Green Holdings LLC, Dillon Wind LLC, Flat Rock Windpower LLC, Flying Cloud Power Partners, LLC,...

  7. 77 FR 51966 - Upper Rio Grande Resource Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-28

    ... of meeting. SUMMARY: The Upper Rio Grande Resource Advisory Committee will meet in South Fork... will begin at 10:00 a.m. ADDRESSES: The meeting will be held at the South Fork Community Building, 0254 Highway 149, South Fork, Colorado. Written comments should be sent to Mike Blakeman, San Luis...

  8. 77 FR 73393 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-12-10

    ... provides corrections to that table, to be used in lieu of the information published at 75 FR 5909. The... rule published at 75 FR 5909, in the February 5, 2010, issue of the Federal Register, FEMA published a..., identified by Docket No. FEMA-B- 1085, to Luis Rodriguez, Chief, Engineering Management Branch,...

  9. 50 CFR 660.112 - Trawl fishery-prohibitions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... landings, containing all data, and in the exact manner, required by the regulation at § 660.13, subpart C... Islands/Fanny Shoal, Half Moon Bay, Monterey Bay/Canyon, Point Sur Deep, Big Sur Coast/Port San Luis,...

  10. Eventos de Marzo (March Events).

    ERIC Educational Resources Information Center

    Toro, Leonor

    Designed for teachers, this booklet, written in Spanish, contains information on seven March events: La Ley Jones; Pachin Marin; San Patricio; Primavera; Luis Pales Matos; La Masacre de Ponce; and La Esclavitud. The first section provides an overview of the Ley Jones, which introduced the bill of rights and made American citizenship obligatory for…

  11. 76 FR 26976 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-10

    ..., identified by Docket No. FEMA-B-1193, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal....; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3 CFR, 1979 Comp., p....

  12. 76 FR 26982 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-10

    ... provides corrections to that table, to be used in lieu of the information published at 73 FR 70944. The.... Specifically, it addresses the flooding source Licking River (Cave Run Lake). DATES: Comments are to be...- 1021, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and...

  13. 78 FR 10072 - Final Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-13

    .... FOR FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management Branch, Federal... and Review, 58 FR 51735. Executive Order 13132, Federalism. This final rule involves no policies that..., 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3 CFR, 1979 Comp., p. 376. Sec. 67.11 0 2....

  14. 76 FR 3531 - Final Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-20

    ... CONTACT: Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation... Executive Order 12866 of September 30, 1993, Regulatory Planning and Review, 58 FR 51735. Executive Order....C. 4001 et seq.; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44...

  15. 75 FR 75949 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-07

    ..., identified by Docket No. FEMA-B-1161, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal....; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3 CFR, 1979 Comp., p....

  16. 75 FR 75941 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-07

    ..., identified by Docket No. FEMA-B-1164, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal....; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3 CFR, 1979 Comp., p....

  17. 77 FR 58560 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-21

    ..., identified by Docket No. FEMA-B-1270, to Luis Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW... 22950 Huron River Drive, New Boston, MI 48164. Delaware County, Ohio, and Incorporated Areas...

  18. 75 FR 75945 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-07

    ..., identified by Docket No. FEMA-B-1168, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal....; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3 CFR, 1979 Comp., p....

  19. 76 FR 46715 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-03

    ... provides corrections to that table, to be used in lieu of the information published at 75 FR 29290. The... Patuxent River, Marley Creek, Midway Branch, Patapsco River, Patuxent River, Sawmill Creek, and Severn Run..., identified by Docket No. FEMA-B- 1101, to Luis Rodriguez, Chief, Engineering Management Branch,...

  20. 77 FR 58562 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-21

    ..., identified by Docket No. FEMA-B-1267 to Luis ] Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW.... Village of Black River Village Office, 107 Jefferson Place, Black River, NY 13612. Weber County, Utah,...

  1. 78 FR 9598 - Final Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-02-11

    ... CONTACT: Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation... 12866 of September 30, 1993, Regulatory Planning and Review, 58 FR 51735. Executive Order 13132... et seq.; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3...

  2. 76 FR 3590 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-01-20

    ..., identified by Docket No. FEMA-B-1171, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal....; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3 CFR, 1979 Comp., p....

  3. 76 FR 26978 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-05-10

    ..., identified by Docket No. FEMA-B-1190, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal....; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3 CFR, 1979 Comp., p....

  4. Eventos de Mayo (May Events).

    ERIC Educational Resources Information Center

    Toro, Leonor; Pla, Myrna

    Designed as a resource for teachers, this booklet, written in Spanish, contains brief information on seven May events: La Semana de la Educacion (first Friday in May), Harry S. Truman (May 8), Dia de las Madres (second Sunday in May), Luis Llorens Torres (May 14), La Cruz Roja (May 21), John F. Kennedy (May 29), and El Dia De Conmemoracion (May…

  5. General Community Needs Assessment: Conducted for the Development of the Educational and Facilities Master Plan.

    ERIC Educational Resources Information Center

    Shaffer, Richard A.

    In 1990, a needs assessment survey was conducted of residents of San Luis Obispo County to gather information regarding community members' experiences with Cuesta College (CC), opinions about what CC should be doing, assessment of how good a job the college is doing, and obstacles preventing people from attending CC. Study findings, based on…

  6. Annual Report to the Board of Trustees, School Year 1979-1980.

    ERIC Educational Resources Information Center

    Cuesta Coll., San Luis Obispo, CA.

    Financial and program information are presented in this five-part annual report summarizing the instructional and administrative activities of Cuesta College and the San Luis Obispo Community College District during l979-80. Part I examines the status of eight areas under the supervision of the Office of Educational Services: curriculum…

  7. Cuesta College Student Withdrawal Survey.

    ERIC Educational Resources Information Center

    Hagen, Peter F.; Cartnal, Ryan

    The spring 1999 student withdrawal survey was made available for approximately two weeks before the final withdrawal deadline to all students who formally dropped a class through the admissions office at either the North County or San Luis Obsipo campus of Cuesta College in California. A total of 438 useable surveys were collected. The identical…

  8. 78 FR 66105 - Additional Designations, Foreign Narcotics Kingpin Designation Act

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-11-04

    .... CALLE QUIROS, Luis Santiago, Madrid, Spain; Lima, Peru; DOB 22 Jul 1965; POB Madrid, Spain; citizen Spain; alt. citizen Peru; D.N.I. 01927713-Z (Spain); alt. D.N.I. 10831176-8 (Peru) (individual) (Linked To: TEXTIMAX SPAIN S.L.; Linked To: CASTIZAL MADRILENA S.L.; Linked To: INMOBILIARIA CASTIZAL...

  9. 76 FR 46701 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-08-03

    ..., identified by Docket No. FEMA-B-1207, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal..., Civil Justice Reform. This proposed rule meets the applicable standards of Executive Order 12988....

  10. 75 FR 78647 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-16

    ..., identified by Docket No. FEMA-B-1163, to Luis Rodriguez, Chief, Engineering Management Branch, Federal... Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal..., Civil Justice Reform. This proposed rule meets the applicable standards of Executive Order 12988....

  11. Developing a Science Cafe Program for Your University Library

    ERIC Educational Resources Information Center

    Scaramozzino, Jeanine Marie; Trujillo, Catherine

    2010-01-01

    The Science Cafe is a national movement that attempts to foster community dialog and inquiry on scientific topics in informal venues such as coffee houses, bookstores, restaurants and bars. The California Polytechnic State University, San Luis Obispo, Robert E. Kennedy Library staff have taken the Science Cafe model out of bars and cafes and into…

  12. Proceedings of the Annual Meeting of the Association for Education in Journalism and Mass Communication (79th, Anaheim, CA, August 10-13, 1996). Qualitative Studies Division.

    ERIC Educational Resources Information Center

    Association for Education in Journalism and Mass Communication.

    The Qualitative Studies section of the proceedings contains the following 13 papers: "Writing as Theater: The Marketing of the Digital Word" (Sally McMillan); "Rethinking Ideology: Polysemy, Pleasure and Hegemony in Television Culture" (Luis Rivera-Perez); "Low Power FM: A Small History" (Gregory J. Adamo); "The Residue of Culture: An Ellulian…

  13. What's Happening in May? A Salute to Women Educators in Connecticut.

    ERIC Educational Resources Information Center

    Toro, Leonor; And Others

    Brief information is given on May events celebrated by Puerto Ricans: May Day; Mother's Day; World Red Cross Day; Armed Forces Day; Memorial Day; and the birthdays of Horace Mann ("Father of the Common Schools"), Harry S. Truman, Luis Llorens Torres (poet), Ralph Waldo Emerson (poet), and Patrick Henry (stateman and orator). Designed as a teacher…

  14. What's Happening in February?

    ERIC Educational Resources Information Center

    Weissman, Ron; And Others

    Brief information is given on 12 February events celebrated by Puerto Ricans: Groundhog Day; Candlemas; St. Valentine's Day; Mardi Gras; Ash Wednesday; Black History; and the birthdays of Thomas Alva Edison, Abraham Lincoln, Susan B. Anthony, Julia de Burgos, Luis Munoz Marin, and George Washington. Designed as a teacher resource, the booklet…

  15. Eventos de Febrero (February Events).

    ERIC Educational Resources Information Center

    Toro, Leonor; Pla, Myrna

    Designed as a resource for teachers, the booklet contains brief information on eight events celebrated by Puerto Ricans in the month of February: La Candelaria; Abraham Lincoln; Black History; Valentine's Day; Julia de Burgos; Luis Munoz Marin; George Washington; and the Carnaval. Written in Spanish, the booklet discusses the orgin and ways of…

  16. Digital Content: The Babel of Cyberspace.

    ERIC Educational Resources Information Center

    Bruce, Bertram

    1999-01-01

    Takes a fanciful journey into the digital library imagined by Jorge Luis Borges, and uses it as a metaphor to examine what sort of library the World Wide Web is. Examines how digital libraries are growing and what they mean for literacy education. Includes a description of a particular Web page, and a glossary. (SR)

  17. Interactive Computing With a Programmable Calculator; Student Experimentations in Numerical Methods.

    ERIC Educational Resources Information Center

    Gerald, Curtis F.

    Programable desk calculators can provide students with personal experience in the use of numerical methods. Courses at California Polytechnic State University at San Luis Obispo use the Compucorp Model 025 Educator Experiences with it as a teaching device for solving non-linear equations and differential equations show that students can by-pass…

  18. Auto-ionization in lutetium iodide complexes: effect of the Iioic radius on lanthanide-iodide binding.

    PubMed

    Giesbrecht, Garth R; Gordon, John C; Clark, David L; Scott, Brian L

    2004-02-01

    Reaction of lutetium metal with 1.5 equiv of elemental iodine in 2-propanol leads to the isolation of LuI(3)(HO(i)Pr)(4) (1). An X-ray crystal structure reveals an ionic structure with well-separated [LuI(2)(HO(i)Pr)(4)] cations and [I] anions. Dissolution of 1 in pyridine generates the unusual alkoxide species [LuI(O(i)Pr)(py)(5)][I] (2) with the elimination of HI. An X-ray crystal structure of 2 confirmed the ionic nature of the compound, with the cationic portion of the complex exhibiting a seven-coordinated lutetium center with trans-disposed iodo and alkoxide ligands and five pyridine molecules equally displaced within the equatorial plane. Exposure of 2 to iodotrimethylsilane yields the expected triiodide species [LuI(2)(py)(5)][I] (3), which may also be prepared by refluxing commercially available LuI(3) in THF, followed by crystallization from a THF/pyridine mixture. The solid-state structure of 3 is similar to that of 2, with the alkoxide ligand having been replaced by an iodide. The formation of ionic structures 1-3 as opposed to the higher-coordinated neutral species may be traced to the small lutetium center and the presence of relatively strong Lewis bases within the coordination sphere of the metal. PMID:14753829

  19. Society for the History of Psychology news.

    PubMed

    Rodkey, Elissa

    2015-02-01

    Presents two brief news items. The first item discusses the archives of Roger Sperry, 1981 Nobel Prize Laureate. The note provides information as to the materials archived, their location, and contact archivist. The second item discusses the passing of José Luis Pinillos Díaz (1919-2013), a founder of Spanish psychology. PMID:25664887

  20. 77 FR 39721 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-05

    ..., identified by Docket No. FEMA-B-1256, to Luis Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW... 18042. Borough of Wind Gap Borough Offices, 29 Mechanic Street, Wind Gap, PA 18091. City of...

  1. 78 FR 77481 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-12-23

    ..., identified by Docket No. FEMA-B-1352, to Luis Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW.... Town of Laurel Code Enforcement Office, 201 Mechanic Street, Laurel, DE 19956. Town of Millsboro...

  2. 77 FR 66555 - Final Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-11-06

    ... CONTACT: Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and Mitigation... 12866 of September 30, ] 1993, Regulatory Planning and Review, 58 FR 51735. Executive Order 13132... et seq.; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3...

  3. 77 FR 21476 - Final Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-04-10

    ... FURTHER INFORMATION CONTACT: Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and... 12866 of September 30, 1993, Regulatory Planning and Review, 58 FR 51735. Executive Order 13132... et seq.; Reorganization Plan No. 3 of 1978, 3 CFR, 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3...

  4. 76 FR 56724 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-09-14

    ... Docket No. FEMA-B-1214, to Luis Rodriguez, Chief, Engineering Management Branch, Federal Insurance and..., Engineering Management Branch, Federal Insurance and Mitigation Administration, Federal Emergency Management..., 1978 Comp., p. 329; E.O. 12127, 44 FR 19367, 3 CFR, 1979 Comp., p. 376. Sec. 67.4 2. The...

  5. 75 FR 55602 - Notice of Intent To Prepare an Environmental Assessment To Amend the Resource Management Plan for...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-09-13

    ...In compliance with the National Environmental Policy Act of 1969 (NEPA), as amended, and the Federal Land Policy and Management Act (FLPMA) of 1976, as amended, the Bureau of Land Management (BLM) San Luis Valley Public Lands Center, Monte Vista, Colorado, intends to prepare an Environmental Assessment (EA) and by this notice is announcing the beginning of the scoping process to solicit public......

  6. 12. CONCRETE STAIRWAY LEADING TO A LANDING BUILT TO HOUSE ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    12. CONCRETE STAIRWAY LEADING TO A LANDING BUILT TO HOUSE THE MACHINERY AND COUNTERWEIGHT FOR THE DRUM GATE WHICH WAS NEVER INSTALLED, INSIDE THE RIGHT (WEST) BUTTRESS. CAMERA FACING NORTH. - Salinas Dam, Salinas River near Pozo Road, Santa Margarita, San Luis Obispo County, CA

  7. Carnegie Observatories Astrophysics 4 Volume Hardback Set

    NASA Astrophysics Data System (ADS)

    Ho, Luis

    2004-11-01

    Volume 1: Coevolution of Black Holes and Galaxies Luis C. Ho. Volume 2: Measuring and Modelling the Universe Wendy L. Freedman. Volume 3: Clusters of Galaxies John S. Mulchaey, Alan Dressler and Augustus Oemler. Volume 4: Origin and Evolution of the Elements Andrew McWilliam and Michael Rauch.

  8. Carnegie Observatories Astrophysics 4 Volume Paperback Set

    NASA Astrophysics Data System (ADS)

    Ho, Luis

    2011-11-01

    Volume 1: Coevolution of Black Holes and Galaxies Luis C. Ho. Volume 2: Measuring and Modelling the Universe Wendy L. Freedman. Volume 3: Clusters of Galaxies John S. Mulchaey, Alan Dressler and Augustus Oemler. Volume 4: Origin and Evolution of the Elements Andrew McWilliam and Michael Rauch.

  9. 77 FR 43609 - Endangered and Threatened Wildlife and Plants; Incidental Take Permit Application; Draft...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-07-25

    ... Application; Draft Environmental Assessment and Draft San Luis Valley Regional Habitat Conservation Plan.... SUMMARY: We, the U.S. Fish and Wildlife Service, have received applications from the Rio Grande Water Conservation District; Alamosa, Conejos, Costilla, Mineral, Rio Grande, and Saguache Counties;...

  10. Think before for a Better After.

    ERIC Educational Resources Information Center

    Diskin, Brooke; Mullen, Kyla; Lancaster, Kate

    2003-01-01

    Describes a campaign to promote recycling and energy and water conservation at the California Polytechnic State University campus in San Luis Obispo. The student-led effort influenced students to think about their actions and change their behaviors to be more eco-friendly. (SLD)

  11. At the Intersection between the Subject and the Political: A Contribution to an Ongoing Discussion

    ERIC Educational Resources Information Center

    Pais, Alexandre

    2016-01-01

    The issue of subjectivity has recently occasioned a lively discussion in this journal opposing socioculturalism and Lacanian psychoanalysis. By confronting Luis Radford's cultural theory with Jacques Lacan's psychoanalysis, Tony Brown sought to show the limitations of socioculturalism. This article takes advantage of that discussion to develop a…

  12. Will the Family Farm Survive in America? Part 1: Federal Reclamation Policy (Westlands Water District). Joint Hearings Before the Select Committee on Small Business and the Committee on Interior and Insular Affairs, U.S. Senate, 94th Congress, 1st Session (July 17 and 22, 1975).

    ERIC Educational Resources Information Center

    Congress of the U.S., Washington, DC. Senate Committee on Interior and Insular Affairs.

    The national reclamation program was to encourage people to settle on the land, to enable them to own the land they farmed, and to spread the benefit of subsidized irrigation water to as many independent farm families as possible. The San Luis Unit of the Central Valley Project, the largest pumped water diversion and water storage project, was…

  13. Cover crops alter the soil microbial community and increase potato tuber yield and quality

    Technology Transfer Automated Retrieval System (TEKTRAN)

    An on-going study at a commercial farm operation in the San Luis Valley, CO is examining the effect of various summer cover crops (mustard, canola, sorghum-sudangrass, and a wet fallow control) on potato tuber yield and quality. In four of the five years, potato tuber yield and quality has shown si...

  14. 78 FR 34140 - Qualification of Drivers; Exemption Applications; Vision

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-06

    ...) published in the Federal Register on January 17, 2008 (73 FR 3316). FOR FURTHER INFORMATION CONTACT: Elaine.... Brewer (WA) Andre G. Burns (TX) Brett L. Condon (MD) Christopher A. Deadman (MI) William K. Gullett (KY... E. Roche (VA) Luis H. Sanchez (WI) David E. Sanders (NC) David B. Speller (MN) Kenneth C. Steele...

  15. A Laboratory Classroom Where ?Wining? Is Encouraged

    ERIC Educational Resources Information Center

    Gibbs, Hope

    2004-01-01

    A wine analysis for most is: take a sip, and either like it or don't. Not so for the students taking wine analysis courses at California Polytechnic State University in San Luis Obispo, California. In the college's new Wine Analysis Laboratory, students learn how to run chemical analyses of wines and compare chemical profiles of wines. Professor…

  16. 75 FR 6026 - Environmental Impact Statements; Notice of Availability

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-02-05

    ... Pumping Plant and Pipeline Connection, San Luis Delta-Mendota Water Authority Project, Central Valley Project, Alameda and San Joaquin Counties, CA, Contact: Steve Tuggle 916-353-4549. The U.S. Department of..., Contact: Kent Randall 619-545-9339, Revision to FR Published 01/ 22/2010: Correction to Contact...

  17. 77 FR 46518 - Draft Resource Management Plan/General Plan Draft Environmental Impact Statement/Revised Draft...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-03

    ... Parks and Recreation (CDPR), as the California Environmental Quality Act State lead agency, have made available for public review and comment the San Luis Reservoir State Recreation Area Resource Management... California Department of Parks and Recreation was given the responsibility to plan, design,...

  18. 78 FR 36220 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-17

    ..., identified by Docket No. FEMA-B-1322, to Luis Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW... resolution process. SRPs are independent panels of experts in hydrology, hydraulics, and other...

  19. 78 FR 36217 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-17

    ..., identified by Docket No. FEMA-B-1325, to Luis Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW... resolution process. SRPs are independent panels of experts in hydrology, hydraulics, and other...

  20. 77 FR 56669 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-13

    ..., identified by Docket No. FEMA-B-1265, to Luis Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW... resolution process. SRPs are independent panels of experts in hydrology, hydraulics, and other...

  1. 78 FR 57646 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-09-19

    ..., identified by Docket No. FEMA-B-1343, to Luis Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW... resolution process. SRPs are independent panels of experts in hydrology, hydraulics, and other...

  2. 78 FR 36212 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-17

    ..., identified by Docket No. FEMA-B-1323, to Luis Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW... resolution process. SRPs are independent panels of experts in hydrology, hydraulics, and other...

  3. 78 FR 36213 - Proposed Flood Hazard Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2013-06-17

    ..., identified by Docket No. FEMA-B-1329, to Luis Rodriguez, Chief, Engineering Management Branch, Federal..., Engineering Management Branch, Federal Insurance and Mitigation Administration, FEMA, 500 C Street SW... resolution process. SRPs are independent panels of experts in hydrology, hydraulics, and other...

  4. What's Happening in July?

    ERIC Educational Resources Information Center

    Toro, Leonor; And Others

    Designed as a teacher resource, the booklet provides brief information on eight July events: Independence Day; The Patron Saint Festivals and the Festival of Loiza, celebrated by Puerto Ricans; and the birthdays of P. T. Barnum, Elias Howe, John Quincy Adams, Luis Munoz Rivera, and Simon Bolivar. Information is provided on the Declaration of…

  5. 27 CFR 9.35 - Edna Valley.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... the intersection with the 400-foot contour line of the northeastern flank of the San Luis Range; (3) Thence in a generally easterly and then a southeasterly direction along this 400-foot contour line of the... Canyon to Tiber; (5) Thence in a generally easterly direction along the 400-foot contour line of...

  6. 27 CFR 9.35 - Edna Valley.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... the intersection with the 400-foot contour line of the northeastern flank of the San Luis Range; (3) Thence in a generally easterly and then a southeasterly direction along this 400-foot contour line of the... Canyon to Tiber; (5) Thence in a generally easterly direction along the 400-foot contour line of...

  7. 27 CFR 9.35 - Edna Valley.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... the intersection with the 400-foot contour line of the northeastern flank of the San Luis Range; (3) Thence in a generally easterly and then a southeasterly direction along this 400-foot contour line of the... Canyon to Tiber; (5) Thence in a generally easterly direction along the 400-foot contour line of...

  8. 27 CFR 9.35 - Edna Valley.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... the intersection with the 400-foot contour line of the northeastern flank of the San Luis Range; (3) Thence in a generally easterly and then a southeasterly direction along this 400-foot contour line of the... Canyon to Tiber; (5) Thence in a generally easterly direction along the 400-foot contour line of...

  9. 27 CFR 9.35 - Edna Valley.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... the intersection with the 400-foot contour line of the northeastern flank of the San Luis Range; (3) Thence in a generally easterly and then a southeasterly direction along this 400-foot contour line of the... Canyon to Tiber; (5) Thence in a generally easterly direction along the 400-foot contour line of...

  10. A COMPARISON OF APPROACHES TO PRIORITIZING SITES FOR RIPARIAN RESTORATION

    EPA Science Inventory

    This study compares the results of Olson and Harris (1997) and Russell et al.(1997)in their work to prioritize sites for riparian restoration in the San Luis Rey River watershed. Olson and Harris defined reaches of the mainstem and evaluated the relative potential for restoration...

  11. "¡Pobre pierna que sólo sirve para andar!" Female (Dis)empowerments, (Dis)ability, and Space in Literary and Filmic "Tristana"

    ERIC Educational Resources Information Center

    Muñoz-Muriana, Sara

    2015-01-01

    This current study explores the function of physical space as a metaphor for freedom and sexual expression in Benito Pérez Galdós's novel Tristana (1892) and Luis Buñuel's loose filmic adaptation (1970). The female walk, a foundational activity in the formative process of the subject, will serve Tristana as a path towards emancipation and freedom,…

  12. Reach Out and Touch Someone: Tactile Communication in Selected Puerto Rican Novels.

    ERIC Educational Resources Information Center

    O'Mara, Joan

    The importance and varieties of human touch have been the subject of much research. Touching varies from culture to culture and is a way of talking in most Latin American countries. Three Puerto Rican novels provide examples of this nonverbal communicative style: "Mambru se fue a la guerra," by Jose Luis Gonzalez; "La vispera del hombre," by Rene…

  13. Anti-inflammatory and anti-oxidant effect of Calea urticifolia lyophilized aqueous extract on lipopolysaccharide-stimulated RAW 264.7 macrophages

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Ethnopharmacological relevance: Calea urticifolia leaves are traditionally used as a remedy to treat gastric ulcers, diabetes, and inflammation by the Xi’uy ancient native community of San Luis Potosi, Mexico. Aim of the study: The aim was to assess the effects of the aqueous extract of the Mexican...

  14. Speech of italian ambassador

    SciTech Connect

    2008-04-09

    L'ambassadeur italien (nom?)fait un discours sur l'aspect de la recherche au Cern, une organisation internationale qui a comme but la connaissance dans sa forme la plus pure et libre d'un intérêt planétaire. Il remet un prix au DG C.Rubbia qui lui remercie en français

  15. The Development of Child Subjectivity in "La lengua de las mariposas"

    ERIC Educational Resources Information Center

    Ryan, Lorraine

    2012-01-01

    Jose Luis Cuerda's film "La lengua de las mariposas" is set in rural Galicia in the immediate lead-up to the outbreak of the Spanish Civil War. It portrays the tender relationship between a Republican schoolteacher, Don Gregorio, and a boy named Moncho. Upon the Nationalist capture of the town, the young Moncho hurls stones at his friend, but…

  16. 77 FR 51744 - Proposed Flood Elevation Determinations

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-08-27

    ... buildings. Correction In the proposed rule published at 74 FR 66602, in the December 16, 2009, issue of the... proposed rule at 74 FR 66602. (Catalog of Federal Domestic Assistance No. 97.022, ``Flood Insurance... may submit comments, identified by Docket No. FEMA-B- 1083, to Luis Rodriguez, Chief,...

  17. The Implementation of Inmate Mentor Programs in the Correctional Treatment System as an Innovative Approach

    ERIC Educational Resources Information Center

    Cook, Jana; McClure, Scott; Koutsenok, Igor; Lord, Scot

    2008-01-01

    In October 2006, the California Men's Colony (CMC) in San Luis Obispo, faced with staff recruitment and retention difficulties, took an innovative step to utilize long-term sentenced inmates as peer mentors and primary counselors to lead their prison-based therapeutic community (TC) program. The program was designed, developed, and implemented…

  18. THE ROLE OF GIS IN SELECTING SITES FOR RIPARIAN RESTORATION BASED ON HYDROLOGY AND LAND USE

    EPA Science Inventory

    Successful long-term wetland restoration efforts require consideration of hydrology and surrounding land use during the site selection process. This article describes an approach to initial site selection in the San Luis Rey River watershed in southern California that uses waters...

  19. Eventos de Julio (July Events).

    ERIC Educational Resources Information Center

    Pla, Myrna; Toro, Leonor

    Written in Spanish, this booklet contains brief information on 10 July events celebrated by Puerto Ricans: United States Declaration of Independence; the birthdays of P.T. Barnum, Elias Howe, John Quincy Adams, Luis Munoz Rivera, and Simon Bolivar; Marisol Malaret (first puerto Rican to be "Miss Universe"); Puerto Rican Constitution; Las Fiestas…

  20. Ecology and management of savannas and semi-deserts of central Argentina

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Vegetation of western pampas of central Argentina comprises: caldera, local name of a savanna to woodland ecosystem dominated by Prosopis caldenia; short-grassland and dune-grassland. The area include the central La Pampa and southern San Luis provinces, following a western precipitation gradient fr...

  1. The Psychiatric Evaluation and Psychotherapy of the Hispanic Bilingual Patient.

    ERIC Educational Resources Information Center

    Marcos, Luis R.; And Others

    1980-01-01

    This journal issue concerns research projects conducted at the Hispanic Research Center of Fordham University in New York City. In the first article, Luis R. Marcos discusses research on the psychiatric evaluation and psychotherapy of bilingual Hispanic patients, focusing primarily on linguistic factors which affect evaluation and treatment of the…

  2. Diversity and Challenge in Teacher Education. Papers from the Illinois/Indiana ATE Mini-Clinic.

    ERIC Educational Resources Information Center

    Clay-Mendez, Luis Felipe, Ed.

    The document presents the following papers: (1) "Eliot Wigginton: A "Shining Moment" of the Mini Clinic" (Luis Felipe Clay Mendez); (2) "Telling it Like it Is: Attitudes and Opinions of Beginning Teachers" (Erma Williams and others); (3) "Redesigning the Role of the Student Teacher Supervisor: Use of Reflective Techniques" (Barbara S. De Salvo);…

  3. Advances in Distance Learning. Symposium 38. [Concurrent Symposium Session at AHRD Annual Conference, 2000.

    ERIC Educational Resources Information Center

    2000

    Three presentations are provided from Symposium 38, Advances in Distance Learning, of the Academy of Human Resource Development 2000 Conference Proceedings. "Teaching Strategies in a Synchronous Learning Environment for Adult Students" (Luis A. C. Lima, Kathryn S. Hoff) reports the responses of intact cohort groups enrolled in spring semester 1999…

  4. Swallowed: Political Ecology and Environmentalism in the Spanish American "Novela de la Selva"

    ERIC Educational Resources Information Center

    DeVries, Scott

    2010-01-01

    In this paper, I begin with the identification of a moment of intertextuality between "Un viejo que leia novelas de amor" (1989) by Chilean Luis Sepulveda and "La voragine" (1924) by Colombian Jose Eustasio Rivera as an analytical motif for a reevaluation of the environmentalism and political ecologies in the Spanish American "novela de la selva"…

  5. Meeting LEP

    SciTech Connect

    2006-05-23

    Le DG J.Adams fait l'introduction et présente les deux autres orateurs. Pierre Darriulat qui fait un doscours sur la physique à l'occasion du LEP, Wolfgang Schnell, qui parle du projet de la machine LEP et le DG lui-même contribue avec quelques réflexions. Présentation des dias

  6. New Horizons in Education, 2000.

    ERIC Educational Resources Information Center

    Ho, Kwok Keung, Ed.

    2000-01-01

    This document contains the May and November 2000 issues of "New Horizons in Education," with articles in English and Chinese. The May issue includes the following articles: "A Key to Successful Environmental Education: Teacher Trainees' Attitude, Behaviour, and Knowledge" (Kevin Chung Wai Lui, Eric Po Keung Tsang, Sing Lai Chan); "Critical…

  7. 75 FR 34094 - Saguache County Resource Advisory Committee

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-06-16

    ... Valley Public Lands Center, 1803 West U.S. Highway 160, Monte Vista, CO 81144. Comments may also be sent....S. Highway 160, Monte Vista, CO 81144. FOR FURTHER INFORMATION CONTACT: Mike Blakeman, RAC coordinator, USDA, San Luis Valley Public Lands Center, 1803 West U.S. Highway 160, Monte Vista, CO 81144;...

  8. 76 FR 12720 - City of Escondido, CA, and Vista Irrigation District; Notice of Application Accepted for Filing...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-03-08

    ... Energy Regulatory Commission City of Escondido, CA, and Vista Irrigation District; Notice of Application... Filed: December 3, 2010. d. Applicant: City of Escondido, California (Escondido) and Vista Irrigation District (Vista). e. Name of Project: Escondido Hydroelectric Project. f. Location: On the San Luis...

  9. Acceleration of Selenium Volatilization in Seleniferous Agricultural Drainage Sediments Amended With Methionine and Casein.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Phytoremediation is a potential tool for the management of excessive Se in drainage sediment residing in the San Luis Drain in central California via plant extraction or biological volatilization of Se. This two-year field study in 2004/2005 examined the ability of organic amendments-methionine and ...

  10. Appreciating the difference, making a difference.

    PubMed

    Sainz-Pardo, Luiz

    2016-09-24

    Luis Sainz-Pardo didn't realise how different his experience of working as a vet in the UK was until he returned home to Spain, and subsequently travelled throughout Europe. Now, he uses his understanding of veterinary diversity to forge a varied, interesting and international career path within the profession. PMID:27660365

  11. 40 CFR 52.236 - Rules and regulations.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... following Air Pollution Control District (APCD) rules do not define the term “agricultural operations,” the... November 10, 1976. (b) The following Air Pollution Control District (APCD) rules are disapproved because... control rules unenforceable: (1) San Luis Obispo County APCD. (i) Rules 401(B)(4) and 401(B)(6),...

  12. [Discussion about vaccines from animal origin at the Mexican National Academy of Medicine in the XIX century].

    PubMed

    Neri-Vela, Rolando

    2005-01-01

    This is a recount about the prevailing ideas in Mexico during the second half of the XIX century for introducing the use of vaccines of animal origin; thus, the thoughts of men like Agustín Andrade, Angel Iglesias y Domínguez, Lino Ramírez, Fernando Malanco and Luis E. Ruiz, who emphasized this work.

  13. Race, School, and Seinfeld: Autoethnographic Sketching in Black and White

    ERIC Educational Resources Information Center

    Wamsted, John O.

    2011-01-01

    Applying the Deluzoguattarian concept of the trace, this article explores interactions between a White teacher and his Black students and the way race is coconstructed therein. Using a short story by the Argentine mystery writer Jorge Luis Borges as a frame, the author connects the poststructural philosophy of the trace to current notions of…

  14. 77 FR 59599 - Combined Notice of Filings #1

    Federal Register 2010, 2011, 2012, 2013, 2014

    2012-09-28

    ...; ER12-2109-002; ER12-308-003; ER12-422-002; ER12-96-002. Applicants: Dry Lake Wind Power II LLC, Central..., Iberdrola Renewables, LLC, Dillion Wind LLC, Dry Lake Wind Power, LLC, Shiloh I Wind Project, LLC, Mountain View Power Partners III, LLC, Blue ] Creek Wind Farm LLC, San Luis Solar LLC, Big Horn Wind Project...

  15. Society for the History of Psychology news.

    PubMed

    Rodkey, Elissa

    2015-02-01

    Presents two brief news items. The first item discusses the archives of Roger Sperry, 1981 Nobel Prize Laureate. The note provides information as to the materials archived, their location, and contact archivist. The second item discusses the passing of José Luis Pinillos Díaz (1919-2013), a founder of Spanish psychology.

  16. DEVELOPMENTAL TOXICITY OF 2-CHLORO-2'-DEOXYADENOSINE IN THE RAT: INDUCTION OF LUMBAR HERNIA

    EPA Science Inventory

    DEVELOPMENTAL TOXICITY OF 2-CHLORO-2'DEOXYADENOSINE IN THE RAT: INDUCTION OF LUMBAR HERNIA. C. Lau1, M.G. Narotsky1, D. Lui1, D. Best1, R.W. Setzer2, T.B. Knudsen3. 1Reprod. Tox. Div., 2Exp. Tox. Div., NHEERL, US EPA, Research Triangle Park, NC, USA, 3Dept. Path. Anat. Cell Bio...

  17. 76 FR 77552 - Notice of Meeting, Front Range Resource Advisory Council

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-12-13

    .... ADDRESSES: BLM Royal Gorge Field Office, 3028 East Main Street, Ca on City, CO. FOR FURTHER INFORMATION... the BLM Front Range District, which includes the Royal Gorge Field Office (RGFO) and the San Luis... Royal Gorge Field Office and will be available for public inspection and reproduction during...

  18. An outbreak of dengue fever in St. Croix (U. S. Virgin Islands), 2005.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    In the summer of 2005, an outbreak of dengue virus serotype-2 with cases of dengue hemorrhagic fever (DHF) occurred in St. Croix, US Virgin Islands. The medical records of all dengue laboratory-positive patients either seen in the Emergency Department of or admitted to the Governor Juan F. Luis Hosp...

  19. Evolution, Learning, and Semiotics from a Peircean Point of View

    ERIC Educational Resources Information Center

    Otte, Michael Friedrich

    2011-01-01

    One of the most salient arguments in favor of a semiotic approach, put forward on various occasions among others by Luis Radford, claims that semiotics is most appropriate to treat the interaction between socio-cultural and objective aspects of knowledge problems. But if we want to take such claims seriously, we have to undertake revisions of our…

  20. Rethinking What We Do and How We Do It: Systems Thinking Strategies for Library Leadership

    ERIC Educational Resources Information Center

    Somerville, Mary M.; Schader, Barbara; Huston, Malia E.

    2005-01-01

    Library leaders promote reconsideration of organisational purposes, processes, and relationships at California Polytechnic State University in San Luis Obispo, California, USA. Systems thinking, fortified by information literacy, informs workplace changes that provide learning experiences transferable to better alignment of library outcomes with…

  1. Expanding the Purpose of a Prison Education Classroom

    ERIC Educational Resources Information Center

    Thomas, Robert G.

    2012-01-01

    In 1979, when the author began as an academic instructor at the Central Coast Adult School, located inside the California Men's Colony in San Luis Obispo, California, he saw his teaching role in the traditional sense of imparting knowledge through the school's curriculum. Over time, however, his viewpoint changed as he came to recognize that the…

  2. Making Cultura Count inside and out of the Classroom: Public Art & Critical Pedagogy in South Central Los Angeles

    ERIC Educational Resources Information Center

    Garcia, Luis-Genaro

    2012-01-01

    In this article, artist, educator, and activist Luis-Genaro Garcia describes the development and impact of the "May Day service learning project" on his advanced painting class in a high school in South Los Angeles. The project emerged from students' interests: their ideas, concerns for their community, socio-political consciousness, and…

  3. Effects of warming and drought on potential N2O emissions and denitrifying bacteria abundance in grasslands with different land-use.

    PubMed

    Keil, Daniel; Niklaus, Pascal A; von Riedmatten, Lars R; Boeddinghaus, Runa S; Dormann, Carsten F; Scherer-Lorenzen, Michael; Kandeler, Ellen; Marhan, Sven

    2015-07-01

    Increased warming in spring and prolonged summer drought may alter soil microbial denitrification. We measured potential denitrification activity and denitrifier marker gene abundances (nirK, nirS, nosZ) in grasslands soils in three geographic regions characterized by site-specific land-use indices (LUI) after warming in spring, at an intermediate sampling and after summer drought. Potential denitrification was significantly increased by warming, but did not persist over the intermediate sampling. At the intermediate sampling, the relevance of grassland land-use intensity was reflected by increased potential N2O production at sites with higher LUI. Abundances of total bacteria did not respond to experimental warming or drought treatments, displaying resilience to minor and short-term effects of climate change. In contrast, nirS- and nirK-type denitrifiers were more influenced by drought in combination with LUI and pH, while the nosZ abundance responded to the summer drought manipulation. Land-use was a strong driver for potential denitrification as grasslands with higher LUI also had greater potentials for N2O emissions. We conclude that both warming and drought affected the denitrifying communities and the potential denitrification in grassland soils. However, these effects are overruled by regional and site-specific differences in soil chemical and physical properties which are also related to grassland land-use intensity.

  4. Teaching of Psychology: Ideas and Innovations. Proceedings of the Annual Conference on Undergraduate Teaching of Psychology (10th, Ellenville, New York, March 20-22, 1996).

    ERIC Educational Resources Information Center

    Levine, Judith, Ed.; Indenbaum, Gene, Ed.

    The 18 papers in this proceedings describe strategies and practices used in undergraduate psychology courses at two- and four-year colleges. The following presentations are included: "The Costs and Benefits of Critical Thinking," (Randall E. Osborne, Judy Laws, Ken Weadick, and Vicki Mantooth); "What's a Developmentalist To Do?" (Judith Luis);…

  5. Sculptures of Ordinary People.

    ERIC Educational Resources Information Center

    Hubbard, Guy

    2000-01-01

    Discusses the presence of ordinary people in art. Features four sculptors and examples of their work: (1) "Janitor" by Duane Hanson; (2) "The Red Light" by George Segal; (3) "The Sodbuster" by Luis A. Jimenez; and (4) "The Driller" by Mahonri Young. (CMK)

  6. 76 FR 72971 - Notice of Intent to Collect Fees on Public Land in Alamosa County, CO

    Federal Register 2010, 2011, 2012, 2013, 2014

    2011-11-28

    ..., provides for quality experiences, and protects important resources. The BLM's policy is to collect fees at... presence, develop additional services, and protect resources. Campground development is consistent with the 1991 San Luis Resource Area Resource Management Plan, the 2009 Zapata Falls Recreation Area...

  7. 75 FR 77655 - Notice of Proposed Supplementary Rules for Public Lands in Colorado: Saguache, Alamosa, Rio...

    Federal Register 2010, 2011, 2012, 2013, 2014

    2010-12-13

    ..., 2004 (69 FR 16599). The completion of the San Luis Resource Area TMP Environmental Assessment (EA) led..., Alamosa, Rio Grande, Conejos, and Costilla Counties AGENCY: Bureau of Land Management, Interior. ACTION..., Alamosa, Rio Grande, Conejos, and Costilla Counties, Colorado, within the TMP, and under the management...

  8. Back to the Future or towards a Sensory History of Schooling

    ERIC Educational Resources Information Center

    Grosvenor, Ian

    2012-01-01

    This conjectural essay was originally written for a symposium "Historiography of the future: Looking back to the future" held at the International Standing Conference for History of Education (ISCHE) 33, July 2011, San Luis Potosi, Mexico organised by Kate Rousmaniere and Frank Simon. Participants were asked to envision future challenges for the…

  9. It's a Family Affair

    ERIC Educational Resources Information Center

    Ashburn, Elyse

    2007-01-01

    On paper, Mariella Castillo's family makes her likelier than other students to drop out of college. Her mother left school after the fifth grade, and her father has only a middle-school education. Her parents speak little English, and Castillo, who was born in the Mexican state of San Luis Potosi, spoke her first words in Spanish. Numerous studies…

  10. State Governance and Civil Society in Education: Revisiting the Relationship

    ERIC Educational Resources Information Center

    Rockwell, Elsie; Vera, Eugenia Roldan

    2013-01-01

    ISCHE 33 was convened in San Luis Potosi to re-examine a relationship--that between society, education and the state--that had been largely taken for granted in official histories of education of modern nations. This theme was inspired by the bicentenary celebrations of the relatively early nineteenth-century movements (from 1804 to 1824) that…

  11. Medico-Science and School Hygiene: A Contribution to a History of the Senses in Schooling

    ERIC Educational Resources Information Center

    Milewski, Patrice

    2014-01-01

    This article takes as its inspiration Ian Grosvenor's conjectural essay presented for the symposium "Historiography of the Future: Looking Back to the Future" held at the International Standing Conference for History of Education (ISCHE) 33 in July 2011 in San Luis Potosi, Mexico. It contributes to a sensory history of schooling by…

  12. Extinction of the Dinosuars: Scientific Theory

    NASA Technical Reports Server (NTRS)

    Moreno, M. A.

    1993-01-01

    Professor Luis Alvarez, a doctor in physics, of the University of California, Berkeley, proposed in 1980 the theory that an asteroid of 10 kilometers in diameter traveling at more than 100,000 kilometers per hour collided with the earth 65 million years ago causing the extenction of the dinosaurs.

  13. 11. Photocopy of Painting (Original in De Young Museum, San ...

    Library of Congress Historic Buildings Survey, Historic Engineering Record, Historic Landscapes Survey

    11. Photocopy of Painting (Original in De Young Museum, San Francisco, Oriana Day Paintings 1861-1865) Photographer unknown, February 1940 PAINTING OF MISSION COMPLEX SHOWING EXTERIOR PRIOR TO 1835 - Mission San Miguel Arcangel, Highway 101, San Miguel, San Luis Obispo County, CA

  14. The History of the Labor Movement in the United States: A Bibliography.

    ERIC Educational Resources Information Center

    Compton, Luvenia

    The bibliography covers the history of the labor movement in the United States from Colonial times through the 1970s. It has been compiled almost entirely from books and periodicals available in the California Polytechnic State University Library at San Luis Obispo, California. Most of the entries have been published since the 1930s, with almost…

  15. Effects of warming and drought on potential N2O emissions and denitrifying bacteria abundance in grasslands with different land-use.

    PubMed

    Keil, Daniel; Niklaus, Pascal A; von Riedmatten, Lars R; Boeddinghaus, Runa S; Dormann, Carsten F; Scherer-Lorenzen, Michael; Kandeler, Ellen; Marhan, Sven

    2015-07-01

    Increased warming in spring and prolonged summer drought may alter soil microbial denitrification. We measured potential denitrification activity and denitrifier marker gene abundances (nirK, nirS, nosZ) in grasslands soils in three geographic regions characterized by site-specific land-use indices (LUI) after warming in spring, at an intermediate sampling and after summer drought. Potential denitrification was significantly increased by warming, but did not persist over the intermediate sampling. At the intermediate sampling, the relevance of grassland land-use intensity was reflected by increased potential N2O production at sites with higher LUI. Abundances of total bacteria did not respond to experimental warming or drought treatments, displaying resilience to minor and short-term effects of climate change. In contrast, nirS- and nirK-type denitrifiers were more influenced by drought in combination with LUI and pH, while the nosZ abundance responded to the summer drought manipulation. Land-use was a strong driver for potential denitrification as grasslands with higher LUI also had greater potentials for N2O emissions. We conclude that both warming and drought affected the denitrifying communities and the potential denitrification in grassland soils. However, these effects are overruled by regional and site-specific differences in soil chemical and physical properties which are also related to grassland land-use intensity. PMID:26092950

  16. Pollen-based biome reconstructions for Latin America at 0, 6000 and 18 000 radiocarbon years

    USGS Publications Warehouse

    Marchant, R.; Harrison, S.P.; Hooghiemstra, H.; Markgraf, Vera; Van Boxel, J. H.; Ager, T.; Almeida, L.; Anderson, R.; Baied, C.; Behling, H.; Berrio, J.C.; Burbridge, R.; Bjorck, S.; Byrne, R.; Bush, M.B.; Cleef, A.M.; Duivenvoorden, J.F.; Flenley, J.R.; De Oliveira, P.; Van Geel, B.; Graf, K.J.; Gosling, W.D.; Harbele, S.; Van Der Hammen, T.; Hansen, B.C.S.; Horn, S.P.; Islebe, G.A.; Kuhry, P.; Ledru, M.

    2009-01-01

    rain forest indicating that forest was present at some locations at the LGM. Some sites in Central M??xico and lowland Colombia remain unchanged in their biome assignments, although the affinities that these sites have to different biomes do change between 18 000±1000 14C yr BP and present. The " unresponsive" nature of these sites results from their location and the impact of local edaphic influence.

  17. Pollen-based biome reconstructions for Latin America at 0, 6000 and 18 000 radiocarbon years

    USGS Publications Warehouse

    Marchant, R.; Harrison, S.P.; Hooghiemstra, H.; Markgraf, Vera; Van Boxel, J. H.; Ager, T.; Almeida, L.; Anderson, R.; Baied, C.; Behling, H.; Berrio, J.C.; Burbridge, R.; Bjorck, S.; Byrne, R.; Bush, M.B.; Cleef, A.M.; Duivenvoorden, J.F.; Flenley, J.R.; De Oliveira, P.; Van Geel, B.; Graf, K.J.; Gosling, W.D.; Harbele, S.; Van Der Hammen, T.; Hansen, B.C.S.; Horn, S.P.; Islebe, G.A.; Kuhry, P.; Ledru, M.-P.; Mayle, F.E.; Leyden, B.W.; Lozano-Garcia, S.; Melief, A.B.M.; Moreno, P.; Moar, N.T.; Prieto, A.; Van Reenen, G. B.; Salgado-Labouriau, M. L.; Schasignbitz, F.; Schreve-Brinkman, E. J.; Wille, M.

    2009-01-01

    retains cool temperate rain forest indicating that forest was present at some locations at the LGM. Some sites in Central M??xico and lowland Colombia remain unchanged in their biome assignments, although the affinities that these sites have to different biomes do change between 18 000±1000 14C yr BP and present. The " unresponsive" nature of these sites results from their location and the impact of local edaphic influence.

  18. Neogene basins of the northern Rio Grande rift: Partitioning and asymmetry inherited from Laramide and older uplifts

    USGS Publications Warehouse

    Kellogg, K.S.

    1999-01-01

    Three asymmetric Neogene basins in the northern Rio Grande rift of New Mexico and Colorado - the San Luis basin, the upper Arkansas River graben, and the Blue River graben - are tilted toward large flanking normal faults and lie astride the similarly asymmetric Late Cretaceous-early Tertiary (Laramide) San Juan-San Luis, Sawatch, and Front Range-Gore Range uplifts, respectively. The steep, thrust-faulted side of each uplift is on the same side as the down-rotated side of each of the Neogene basins. In addition, the direction of stratal tilt changes northward across the Villa Grove accommodation zone from east in the San Luis basin to west in the upper Arkansas River graben. This accommodation zone coincides approximately with the northward change from the east-directed San Juan-San Luis uplift to the west-directed Sawatch uplift. These observations, supported by seismic-reflection studies across the San Luis basin and studies of several other superimposed pairs of rift basins and Laramide uplifts, suggest that the basin-bounding normal faults are listric and merge at depth with the older thrusts, which are also listric and root into the crust at about 15-16 km. The Blue River graben is complicated by lack of basin fill and a thrust history along the west side of the Gore Range that is at least as old as late Paleozoic. Nonetheless, the Neogene valley is demonstrably tilted west and lies astride an overall west-directed thrust system, similar to other thrust-and-basin relationships in the northern Rio Grande rift.

  19. Land-use intensification effects on functional properties in tropical plant communities.

    PubMed

    Carreño-Rocabado, Geovana; Peña-Claros, Marielos; Bongers, Frans; Díaz, Sandra; Quetier, Fabien; Chuviña, José; Poorter, Lourens

    2016-01-01

    There is consensus that plant diversity and ecosystem processes are negatively affected by land-use intensification (LUI), but, at the same time, there is empirical evidence that a large heterogeneity can be found in the responses. This heterogeneity is especially poorly understood in tropical ecosystems. We evaluated changes in community functional properties across five common land-use types in the wet tropics with different land-use intensity: mature forest, logged forest, secondary forest, agricultural land, and pastureland, located in the lowlands of Bolivia. For the dominant plant species, we measured 12 functional response traits related to their life history, acquisition and conservation of resources, plant domestication, and breeding. We used three single-trait metrics to describe community functional properties: community abundance-weighted mean (CWM) traits values, coefficient of variation, and kurtosis of distribution. The CWM of all 12 traits clearly responded to LUI. Overall, we found that an increase in LUI resulted in communities dominated by plants with acquisitive leaf trait values. However, contrary to our expectations, secondary forests had more conservative trait values (i.e., lower specific leaf area) than mature and logged forest, probably because they were dominated by palm species. Functional variation peaked at intermediate land-use intensity (high coefficient of variation and low kurtosis), which included secondary forest but, unexpectedly, also agricultural land, which is an intensely managed system. The high functional variation of these systems is due to a combination of how response traits (and species) are filtered out by biophysical filters and how management practices introduced a range of exotic species and their trait values into the local species pool. Our results showed that, at local scales and depending on prevailing environmental and management practices, LUI does not necessarily result in communities with more acquisitive

  20. Spatio-temporal analysis of agricultural land-use intensity across the Western Siberian grain belt.

    PubMed

    Kühling, Insa; Broll, Gabriele; Trautz, Dieter

    2016-02-15

    The Western Siberian grain belt covers 1millionkm² in Asiatic Russia and is of global importance for agriculture. Massive land-use changes took place in that region after the dissolution of the Soviet Union and the collapse of the state farm system. Decreasing land-use intensity (LUI) in post-Soviet Western Siberia was observed on grassland due to declining livestock whilst on cropland trends of land abandonment reversed in the early 2000s. Recultivation of abandoned cropland as well as increasing fertilizer inputs and narrowing crop rotations led to increasing LUI on cropland during the last two decades. Beyond that general trend, no information is available about spatial distribution and magnitude but a crucial precondition for the development of strategies for sustainable land management. To quantify changes and patterns in LUI, we developed an intensity index that reflects the impacts of land-based agricultural production. Based on subnational yearly statistical data, we calculated two separate input-orientated indices for cropland and grassland, respectively. The indices were applied on two spatial scale: at seven provinces covering the Western Siberian grain belt (Altay Kray, Chelyabinsk, Kurgan, Novosibirsk, Omsk, Sverdlovsk and Tyumen) and at all districts of the central province Tyumen. The spatio-temporal analysis clearly showed opposite trends for the two land-use types: decreasing intensity on grassland (-0.015 LUI units per year) and intensification on cropland (+0.014 LUI units per year). Furthermore, a spatial concentration towards intensity centres occurred during transition from a planned to a market economy. A principal component analysis enabled the individual calculations of both land-use types to be combined and revealed a strong link between biophysical conditions and LUI. The findings clearly showed the need for having a different strategy for future sustainable land management for grassland (predominantly used by livestock of households