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Sample records for acanthaceae una maleza

  1. Breeding System of Ruellia succulenta Small (Acanthaceae)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    This study examines the breeding system of Ruellia succulenta (Acanthaceae), an herbaceous perennial found in the pine rockland habitat of southern Florida. Hand pollination treatments were performed on 75 plants, 25 from each of three sites. Treatments applied to test plants included: 1) control ...

  2. Palynological study of the genera Ruellia, Ecbolium, Asystasia, Blepharis and Dicliptera (Acanthaceae) of Yemen

    SciTech Connect

    Al-Hakimi, S. Anisa; Maideen, Haja; Latiff, A.

    2013-11-27

    Pollen morphology of five genera of the family Acanthaceae, namely Ruellia, Blepharis, Asystasia, Ecbolium and Dicliptera (Acanthaceae) of Yemen has been examined using light and scanning electron microscope. Pollen descriptions were provided with two shapes distinguished, spheroidal and prolate. Most of the pollen grains were tricolporate amd psuedocolpi except those of Blepharis which are colpate. The surface is coarsely reticulate, in addition to the lumina that varies in size.

  3. Palynological study of the genera Ruellia, Ecbolium, Asystasia, Blepharis and Dicliptera (Acanthaceae) of Yemen

    NASA Astrophysics Data System (ADS)

    Al-Hakimi, S. Anisa; Maideen, Haja; Latiff, A.

    2013-11-01

    Pollen morphology of five genera of the family Acanthaceae, namely Ruellia, Blepharis, Asystasia, Ecbolium and Dicliptera (Acanthaceae) of Yemen has been examined using light and scanning electron microscope. Pollen descriptions were provided with two shapes distinguished, spheroidal and prolate. Most of the pollen grains were tricolporate amd psuedocolpi except those of Blepharis which are colpate. The surface is coarsely reticulate, in addition to the lumina that varies in size.

  4. Microsatellite analysis in the genome of Acanthaceae: An in silico approach

    PubMed Central

    Kaliswamy, Priyadharsini; Vellingiri, Srividhya; Nathan, Bharathi; Selvaraj, Saravanakumar

    2015-01-01

    Background: Acanthaceae is one of the advanced and specialized families with conventionally used medicinal plants. Simple sequence repeats (SSRs) play a major role as molecular markers for genome analysis and plant breeding. The microsatellites existing in the complete genome sequences would help to attain a direct role in the genome organization, recombination, gene regulation, quantitative genetic variation, and evolution of genes. Objective: The current study reports the frequency of microsatellites and appropriate markers for the Acanthaceae family genome sequences. Materials and Methods: The whole nucleotide sequences of Acanthaceae species were obtained from National Center for Biotechnology Information database and screened for the presence of SSRs. SSR Locator tool was used to predict the microsatellites and inbuilt Primer3 module was used for primer designing. Results: Totally 110 repeats from 108 sequences of Acanthaceae family plant genomes were identified, and the occurrence of dinucleotide repeats was found to be abundant in the genome sequences. The essential amino acid isoleucine was found rich in all the sequences. We also designed the SSR-based primers/markers for 59 sequences of this family that contains microsatellite repeats in their genome. Conclusion: The identified microsatellites and primers might be useful for breeding and genetic studies of plants that belong to Acanthaceae family in the future. PMID:25709226

  5. Cercosporoid fungi (Mycosphaerellaceae) 4. Species on dicots (Acanthaceae to Amaranthaceae).

    PubMed

    Braun, Uwe; Crous, Pedro W; Nakashima, Chiharu

    2015-12-01

    The present paper continues a series of comprehensive taxonomic treatments of cercosporoid fungi (formerly Cercospora s. lat.), belonging to the Mycosphaerellaceae (Ascomycota). The fourth contribution of this series initiates treatments of cercosporoid fungi on dicots and comprises species occurring on hosts belonging the the families Acanthaceae, Actinidiaceae, Adoxaceae, Aizoaceae, Altingiaceae, and Amaranthaceae. The species are described and illustrated in alphabetical order under the particular cercosporoid genera, supplemented by keys to the species concerned. A detailed introduction, a survey of currently recognised cercosporoid genera, a key to the genera concerned, and a discussion of taxonomically relevant characters were published in the first part of this series. The following taxonomic novelties are introduced: Cercospora blepharidicola nom. nov., C. celosiigena sp. nov., C. justiciae-adhatodae sp. nov., C. justiciigena nom. nov., C. sambucicola nom. nov., C. thunbergiigena nom. nov., Cercosporella pseudachyranthis comb. nov., Pseudocercospora cyathulae comb. nov., P. depazeoides comb. nov., P. varia var. viburni-sargentii var. nov., P. viburnicola sp. nov., P. viburni-erosi sp. nov., and P. viburni-nudi sp. nov. PMID:26734548

  6. Origin of African Physacanthus (Acanthaceae) via Wide Hybridization

    PubMed Central

    Tripp, Erin A.; Fatimah, Siti; Darbyshire, Iain; McDade, Lucinda A.

    2013-01-01

    Gene flow between closely related species is a frequent phenomenon that is known to play important roles in organismal evolution. Less clear, however, is the importance of hybridization between distant relatives. We present molecular and morphological evidence that support origin of the plant genus Physacanthus via “wide hybridization” between members of two distantly related lineages in the large family Acanthaceae. These two lineages are well characterized by very different morphologies yet, remarkably, Physacanthus shares features of both. Chloroplast sequences from six loci indicate that all three species of Physacanthus contain haplotypes from both lineages, suggesting that heteroplasmy likely predated speciation in the genus. Although heteroplasmy is thought to be unstable and thus transient, multiple haplotypes have been maintained through time in Physacanthus. The most likely scenario to explain these data is that Physacanthus originated via an ancient hybridization event that involved phylogenetically distant parents. This wide hybridization has resulted in the establishment of an independently evolving clade of flowering plants. PMID:23383261

  7. Genetic variation at microsatellite loci in the tropical herb Aphelandra aurantiaca (Acanthaceae)1

    PubMed Central

    Suárez-Montes, Pilar; Tapia-López, Rosalinda; Núñez-Farfán, Juan

    2015-01-01

    Premise of the study: To assess the effect of forest fragmentation on genetic variation and population structure of Aphelandra aurantiaca (Acanthaceae), a tropical and ornamental herbaceous perennial plant, we developed the first microsatellite primers for the species. Methods and Results: Fourteen microsatellite markers were isolated and characterized from A. aurantiaca genomic libraries enriched for di-, tri-, and tetranucleotide repeat motifs. Polymorphism was evaluated in 107 individuals from four natural populations. Twelve out of 14 genetic markers were polymorphic. The number of alleles per locus ranged from two to 12, and the observed and expected heterozygosities ranged from 0.22 to 0.96 and from 0.20 to 0.87, respectively. Fixation indices ranged from −0.41 to 0.44. Conclusions: These newly developed microsatellite markers for A. aurantiaca will be useful for future population genetic studies, specifically to detect the possible loss of genetic diversity due to habitat fragmentation. PMID:26649265

  8. Purple anthocyanin colouration on lower (abaxial) leaf surface of Hemigraphis colorata (Acanthaceae)

    PubMed Central

    Skaar, Irene; Adaku, Christopher; Jordheim, Monica; Byamukama, Robert; Kiremire, Bernard; Andersen, Øyvind M.

    2014-01-01

    The functional significance of anthocyanin colouration of lower (abaxial) leaf surfaces is not clear. Two anthocyanins, 5-O-methylcyanidin 3-O-(3″-(β-glucuronopyranosyl)-β-glucopyranoside) (1) and 5-O-methylcyanidin 3-O-β-glucopyranoside (2), were isolated from Hemigraphis colorata (Blume) (Acanthaceae) leaves with strong purple abaxial colouration (2.2 and 0.6 mg/g fr. wt., respectively). The glycosyl moiety of 1, the disaccharide 3″-(β-glucuronopyranosyl)-β-glucopyranoside), has previously been reported to occur only in a triterpenoid saponin, lindernioside A. The structural assignment of the aglycone of 1 and 2 is the first complete characterisation of a natural 7-hydroxy-5-methoxyanthocyanidin. Compared to nearly all naturally occurring anthocyanidins, the 5-O-methylation of this anthocyanidin limits the type of possible quinoidal forms of 1 and 2 to be those forms with keto-function in only their 7- and 4′-positions. PMID:24957301

  9. Taxonomic significance of leaf micromorphology in some selected taxa of Acanthaceae (Peninsular Malaysia)

    NASA Astrophysics Data System (ADS)

    Nurul-Aini, C. A. C.; Noraini, T.; Latiff, A.; Amirul-Aiman, A. J.; Ruzi, A. R.; Idris, S.

    2014-09-01

    Comparative leaf micromorphology study was conducted in eight taxa of Acanthaceae from Peninsular Malaysia. Eight chosen taxa were Acanthus ebracteatus Vahl, A. ilicifolius L., A. volubilis Wall, A. montanus T. Anderson, Andrographis paniculata (Burm.f.) Wall. ex Nees, Asystasia gangetica subsp. micrantha (Nees) Ensermu, Chroesthes longifolia (Wight) B. Hansen and Peristrophe roxburghiana (Schult.) Bremek. The objective of this study was to identify the leaf micromorphological characteristics that can be used in species identification and also as supportive data in classification. The procedures involved such as dehydration, critical point drying, gold coated and examination under scanning electron microscope. Findings in this study have demonstrated the similarities and variations in leaf micromorphological characteristics such as in type of epicuticular waxes, cuticular ornamentations, stomata characteristics and in the presence of trichomes. Six types of epicuticular waxes and five types of trichomes were observed. Variations in cuticular ornamentations and stomata structure can be used to differentiate species. One diagnostic character was found and proven to be very useful to identify Acanthus via the presence of simple trichomes (short-conicle like). In conclusion, the results of this study have shown that leaf micromorphological characteristics have taxonomic significance that can be useful in classifications and identification especially at species level.

  10. Labyrinths, columns and cavities: new internal features of pollen grain walls in the Acanthaceae detected by FIB-SEM.

    PubMed

    House, Alisoun; Balkwill, Kevin

    2016-03-01

    External pollen grain morphology has been widely used in the taxonomy and systematics of flowering plants, especially the Acanthaceae which are noted for pollen diversity. However internal pollen wall features have received far less attention due to the difficulty of examining the wall structure. Advancing technology in the field of microscopy has made it possible, with the use of a focused ion beam-scanning electron microscope (FIB-SEM), to view the structure of pollen grain walls in far greater detail and in three dimensions. In this study the wall structures of 13 species from the Acanthaceae were investigated for features of potential systematic relevance. FIB-SEM was applied to obtain precise cross sections of pollen grains at selected positions for examining the wall ultrastructure. Exploratory studies of the exine have thus far identified five basic structural types. The investigations also show that similar external pollen wall features may have a distinctly different internal structure. FIB-SEM studies have revealed diverse internal pollen wall features which may now be investigated for their systematic and functional significance. PMID:26698154

  11. Bar-HRM for Authentication of Plant-Based Medicines: Evaluation of Three Medicinal Products Derived from Acanthaceae Species

    PubMed Central

    Osathanunkul, Maslin; Madesis, Panagiotis; de Boer, Hugo

    2015-01-01

    Medicinal plants are used as a popular alternative to synthetic drugs, both in developed and developing countries. The economic importance of the herbal and natural supplement industry is increasing every year. As the herbal industry grows, consumer safety is one issue that cannot be overlooked. Herbal products in Thai local markets are commonly sold without packaging or labels. Plant powders are stored in large bags or boxes, and therefore buying local herbal products poses a high risk of acquiring counterfeited, substituted and/or adulterated products. Due to these issues, a reliable method to authenticate products is needed. Here DNA barcoding was used in combination with High Resolution Melting analysis (Bar-HRM) to authenticate three medicinal Acanthaceae species (Acanthus ebracteatus, Andrographis paniculata and Rhinacanthus nasutus) commonly used in Thailand. The rbcL barcode was selected for use in primers design for HRM analysis to produce standard melting profiles of the selected species. Melting data from the HRM assay using the designed rbcL primers showed that the three chosen species could be distinguished from each other. HRM curves of all fifteen test samples indicated that three of tested products did not contain the indicated species. Two closely related species (A. paniculata and R. nasutus), which have a high level of morphological similarity, were interchanged with one another in three tested products. Incorrect information on packaging and labels of the tested herbal products was the cause of the results shown here. Morphological similarity among the species of interest also hindered the collection process. The Bar-HRM method developed here proved useful in aiding in the identification and authentication of herbal species in processed samples. In the future, species authentication through Bar-HRM could be used to promote consumer trust, as well as raising the quality of herbal products. PMID:26011474

  12. Petal anatomy of four Justicia (Acanthaceae) species

    NASA Astrophysics Data System (ADS)

    Amirul-Aiman, A. J.; Noraini, T.; Nurul-Aini, C. A. C.; Ruzi, A. R.

    2013-11-01

    Comparative anatomical study on flower petals was studied in four selected Justicia species from Peninsular Malaysia, i.e. J. comata (L.) Lam., J. carnea Lindl. J. betonica Linn. and J. procumbens L with the objective to provide useful data for species identification and differentiation within the genus of Justicia. Methods used in this study are mechanical scrapping on the leaf surfaces and observation under light microscope. Finding in this study has shown that all species are sharing similar type of anticlinal walls pattern, which is sinuous pattern. Two or more type of trichomes is present in all species studied and this character can be used to differentiate Justicia species. Simple multicellular trichomes are found to be present in all species studied. Justicia betonica can be isolated from other species by the existence of cyclo-paracytic stomata on the petal surfaces.

  13. Una visita en Sud America

    NASA Astrophysics Data System (ADS)

    1982-09-01

    Oisfrute de una estadfa en el Hotel La Silla, el mejor hotel de Sud America con su tan unica atmosfera extraterrestre! Los espera su calificado personal de experimentados hoteleros, jefes de cocina, etc., ansiosos todos de satisfacer sus deseos hasta el mas mfnimo detalle. Naturalmente nuestro espacioso restaurant de tres estrellas ofrece un completo surtido de exquisitas comidas y deliciosos tragos (conocedores usualmente eligen "Oelicia Orion" 0 "Centauro Especial"). EI servicio cempleto durante 24 horas incluye nuestra ya mundialmente famosa "Cena de medianoche para los miradores de estrellas", por eso - no olvide: No pierda la oportunidad de una estadfa en EL HOTEL LA SILLA - una experiencia maravillosa!

  14. Generalization versus specialization in pollination systems: visitors, thieves, and pollinators of Hypoestes aristata (Acanthaceae).

    PubMed

    Padyšáková, Eliška; Bartoš, Michael; Tropek, Robert; Janeček, Stěpán

    2013-01-01

    Many recent studies have suggested that the majority of animal-pollinated plants have a higher diversity of pollinators than that expected according to their pollination syndrome. This broad generalization, often based on pollination web data, has been challenged by the fact that some floral visitors recorded in pollination webs are ineffective pollinators. To contribute to this debate, and to obtain a contrast between visitors and pollinators, we studied insect and bird visitors to virgin flowers of Hypoestes aristata in the Bamenda Highlands, Cameroon. We observed the flowers and their visitors for 2-h periods and measured the seed production as a metric of reproductive success. We determined the effects of individual visitors using 2 statistical models, single-visit data that were gathered for more frequent visitor species, and frequency data. This approach enabled us to determine the positive as well as neutral or negative impact of visitors on H. aristata's reproductive success. We found that (i) this plant is not generalized but rather specialized; although we recorded 15 morphotaxa of visitors, only 3 large bee species seemed to be important pollinators; (ii) the carpenter bee Xylocopa cf. inconstans was both the most frequent and the most effective pollinator; (iii) the honey bee Apis mellifera acted as a nectar thief with apparent negative effects on the plant reproduction; and (iv) the close relationship between H. aristata and carpenter bees was in agreement with the large-bee pollination syndrome of this plant. Our results highlight the need for studies detecting the roles of individual visitors. We showed that such an approach is necessary to evaluate the pollination syndrome hypothesis and create relevant evolutionary and ecological hypotheses. PMID:23593135

  15. Generalization versus Specialization in Pollination Systems: Visitors, Thieves, and Pollinators of Hypoestes aristata (Acanthaceae)

    PubMed Central

    Padyšáková, Eliška; Bartoš, Michael; Tropek, Robert; Janeček, Štěpán

    2013-01-01

    Many recent studies have suggested that the majority of animal-pollinated plants have a higher diversity of pollinators than that expected according to their pollination syndrome. This broad generalization, often based on pollination web data, has been challenged by the fact that some floral visitors recorded in pollination webs are ineffective pollinators. To contribute to this debate, and to obtain a contrast between visitors and pollinators, we studied insect and bird visitors to virgin flowers of Hypoestes aristata in the Bamenda Highlands, Cameroon. We observed the flowers and their visitors for 2-h periods and measured the seed production as a metric of reproductive success. We determined the effects of individual visitors using 2 statistical models, single-visit data that were gathered for more frequent visitor species, and frequency data. This approach enabled us to determine the positive as well as neutral or negative impact of visitors on H. aristata’s reproductive success. We found that (i) this plant is not generalized but rather specialized; although we recorded 15 morphotaxa of visitors, only 3 large bee species seemed to be important pollinators; (ii) the carpenter bee Xylocopa cf. inconstans was both the most frequent and the most effective pollinator; (iii) the honey bee Apis mellifera acted as a nectar thief with apparent negative effects on the plant reproduction; and (iv) the close relationship between H. aristata and carpenter bees was in agreement with the large-bee pollination syndrome of this plant. Our results highlight the need for studies detecting the roles of individual visitors. We showed that such an approach is necessary to evaluate the pollination syndrome hypothesis and create relevant evolutionary and ecological hypotheses. PMID:23593135

  16. Predispersal predation of an understory rainforest herb Aphelandra aurantiaca (Acanthaceae) in gaps and mature forest.

    PubMed

    Calvo-Irabién, L M; Islas-Luna, A

    1999-08-01

    The opening of a canopy gap at Los Tuxtlas rainforest has an impact on populations of the understory herb Aphelandra aurantiaca: the ratio of recruited seedlings per reproductive individual is 1:17 in mature forest vs. gaps. Predation occurring before seed dispersal seems a plausible explanation for this observed difference. In a field experiment, in which insecticide was applied to plants growing in gaps and mature forest, we evaluated the extent to which herbivore damage to flowers, fruits, and seeds reduces the number of seeds available for seedling establishment. Under natural conditions, ∼30% of the flowers and >70% of the capsules of A. aurantiaca showed herbivore damage, but its impact changed depending on the type of forest habitat. Flower and fruit herbivores caused more damage in closed forest than in gaps, and this difference was even bigger under the insecticide treatment. Insecticide effectiveness varied depending on the type of forest patch. The highest herbivore impact on seeds was found in the mature forest without insecticide treatment, where most seeds were destroyed. The percentages of seed damage reported here show that predispersal predation is limiting seedling recruitment, especially in mature forest. Other possible explanations might be differences in insect composition, densities, and behavior between gaps and mature forest. PMID:10449389

  17. Is floral specialization an evolutionary dead-end? Pollination system transitions in Ruellia (Acanthaceae).

    PubMed

    Tripp, Erin A; Manos, Paul S

    2008-07-01

    Pollination systems frequently reflect adaptations to particular groups of pollinators. Such systems are indicative of evolutionary specialization and have been important in angiosperm diversification. We studied the evolution of pollination systems in the large genus Ruellia. Phylogenetic analyses, morphological ordinations, ancestral state reconstructions, and a character mapping simulation were conducted to reveal key patterns in the direction and lability of floral characters associated with pollination. We found significant floral morphological differences among species that were generally associated with different groups of floral visitors. Floral evolution has been highly labile and also directional. Some specialized systems such as hawkmoth or bat pollination are likely evolutionary dead-ends. In contrast, specialized pollination by hummingbirds is clearly not a dead-end. We found evidence for multiple reverse transitions from presumed ancestral hummingbird pollination to more derived bee or insect pollination. These repeated origins of insect pollination from hummingbird-pollinated ancestors have not evolved without historical baggage. Flowers of insect-pollinated species derived from hummingbird-pollinated ancestors are morphologically more similar to hummingbird flowers than they are to other more distantly related insect-pollinated flowers. Finally, some pollinator switches were concomitant with changes in floral morphology that are associated with those pollinators. These observations are consistent with the hypothesis that some transitions have been adaptive in the evolution of Ruellia. PMID:18410536

  18. Consentimiento informado: una praxis dialogica para la investigacion

    PubMed Central

    Mondragon-Barrios, Liliana

    2009-01-01

    El consentimiento informado es un proceso, en el que una persona acepta participar en una investigation, conociendo los riesgos, beneficios, consecuencias o problemas que se puedan presenter durante el desarrollo de la misma. El objetivo de este trabajo es reunir las caracteristicas del proceso de consentimiento informado (PCI) pare que su discernimiento y cumplimiento posibilite el ejercicio etc° dialogico, reflexivo y responsable del investigador. Se presentan los resultados de una extensa revision de les elementos del PCI, desde sus cornponentes hasta su fundamento etico y legal, incluyendo los mites y realidades que existen sobre el formato de consentimiento informado come recurso legal de protection. El consentimiento informado no es un formato establecido que los investigadores repliquen, se trata de que la praxis del PCI sea una tarea cotidiana dentro de la investigation con seres humanos, como comunicaciOn deliberative y critica, responsable y comprometida entre dos agentes morales, investigador-investigado. PMID:19507477

  19. Una búsqueda de la identidad regional em Astrometria

    NASA Astrophysics Data System (ADS)

    Abad, C.

    2003-11-01

    La idea sobre una reunión latino-americana que congregara a las personas que desarrollan su trabajo en el área de la astrometría, se gestó a partir de una de las reuniones que el proyecto QUEST realizaba anualmente en Mérida (Venezuela). El proyecto QUEST (Quasars Equatorial Survey Team) celebraba su IV Reunión Anual, en la cual se hacía una revisón de la marcha del proyecto durante el último año. Además, se exponían los logros científicos y técnicos alcanzados hasta el momento y se planificaba el futuro del mismo para el período anual siguiente.

  20. Lichens from the Una National Park (Bosnia and Herzegovina)

    PubMed Central

    Bilovitz, Peter O.; Türk, Roman; Mayrhofer, Helmut

    2011-01-01

    A list of 57 taxa of lichens (56 species) from the Una National Park in the north-western part of Bosnia and Herzegovina is presented. Bacidia subincompta, Buellia griseovirens, Candelariella reflexa, Cetrelia monachorum, Fulgensia subbacteata, Lecanora subcarpinea, L. subrugosa, and Trapeliopsis viridescens are new for Bosnia and Herzegovina. PMID:22318913

  1. Entropía de la información: una herramienta útil

    NASA Astrophysics Data System (ADS)

    Cincotta, P.

    En este trabajo se presenta una muy breve introducción al concepto de Entropía de la Información y se muestran distintas aplicaciones de una misma técnica para estudiar problemas tan variados como la determinación de periodicidad en una serie de tiempo arbitraria o de estimar el grado de caoticidad de una trayectoria en un sistema dinámico de N grados de libertad.

  2. Antisecretory Action of the Extract of the Aerial Parts of Eremomastax speciosa (Acanthaceae) Occurs through Antihistaminic and Anticholinergic Pathways

    PubMed Central

    André Perfusion, Amang; Tan, Paul V.; Ernestine, Nkwengoua; Barthélemy, Nyasse

    2014-01-01

    Objective. The objective of this study was to find out the possible antiulcer mechanism of action of Eremomastax speciosa. Method. Carbachol- and histamine-induced hypersecretion, associated with the pylorus ligation technique, were used in rats. Gastric mucosal ulceration, mucus production, pH, gastric volume, and acidity were measured. Results. Histamine and carbachol raised gastric acidity to 86.50 and 84.80 mEq/L, respectively, in the control rats, and the extracts (200 mg/kg) reduced gastric acidity to 34.60 and 39.00 mEq/L, respectively. Intraduodenal aqueous extract (400 mg/kg) in histamine- and carbachol-treated rats produced significant (P < 0.001) decreases in acid secretion to 28.50 and 28.80 mEq/L, respectively, and 100 percent inhibition of gastric ulceration. Augmented histamine-induced gastric acid secretion (90.20 mEq/L) was significantly reduced to 52.60 and 27.50 mEq/L by the 200 and 400 mg/kg doses of the aqueous extract, respectively. The extract significantly reduced (P < 0.001) the volume of gastric secretion and significantly increased mucus production. The ulcer inhibition potential of the extract significantly dropped to 25–44% (oral extract) and to 29–37% (duodenal extract) in carbachol/indomethacin-treated rats. Conclusion. The aqueous extract of E. speciosa has both cytoprotective and antisecretory effects. The antisecretory effect may involve a mechanism common to both cholinergic and histaminergic pathways. PMID:24695819

  3. Radioastronomía: Una Mirada Más Amplia

    NASA Astrophysics Data System (ADS)

    Bianchi, Viviana

    2004-12-01

    The existence of the celestial bodies is known due to the light they emit. But light is a small part of a bigger phenomenon known as electromagnetic radiation. The representation of all kinds of electromagnetic radiation as a function of its frequency is called the electromagnetic spectrum. If we only studied the visible part of the spectrum, we would ignore a great deal of information. The celestial bodies emit radiation in all the regions of the electromagnetic spectrum, with very different intensity. To capture these data, astronomers design new types of telescopes that capture radiation at different wavelengths, among them the radiotelescopes that, as the name indicates, detect radio waves. The radiotelescope can be compared to a regular radio set. A radio station sends information by means of radio waves. The radio set captures these waves by means of its antenna, processes it and reproduces the information (music, etc.) in audible form. In the field of radioastronomy, interesting observations can be carried out: radio emission from stars, nebulas, pulsars, distant galaxies and stars, radiogalaxies, the Milky Way, the Sun, Jupiter, etc. La presencia de los cuerpos celestes se conoce gracias a que emiten luz. Pero la luz constituye solo una pequeña parte de un fenómeno mucho mas amplio conocido como radiación electromagnética. La representación de todas las clases de radiación como función de su frecuencia se denomina espectro electromagnético. Si solo estudiáramos la parte visual del espectro ignoraríamos una gran cantidad de información. Los cuerpos celestes emiten radiación en todas las regiones del espectro electromagnético, aunque con muy distinta intensidad. Para captar estos datos, los astrónomos deben diseñar nuevos tipos de telescopios que puedan captar la radiación de distintas longitudes de ondas, entre ellos los radiotelescopios, qué como su nombre lo indica detectan ondas de radio. El radiotelescopio puede compararse a un aparato de radio familiar. Una estación emisora está enviando información por medio de ondas de radio. El aparato de radio capta estas ondas mediante su antena, la procesa y el receptor reproduce la información (música, etc.) en forma audible. En el campo de la radioastronomía se pueden realizar observaciones interesantes: Radioestrellas, nebulosas, púlsares, galaxias y estrellas lejanas, radiogalaxias, la Vía Láctea, el Sol, Júpiter, etc.

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

    NASA Astrophysics Data System (ADS)

    Arnal, E. M.

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

  5. Landscape Terms and Place Names in the Trobriand Islands--The Kaile'una Subset

    ERIC Educational Resources Information Center

    Senft, Gunter

    2008-01-01

    After a brief introduction to the topic the paper first gives an overview of Kilivila landscape terms and then presents the inventory of names for villages, wells, island points, reef-channels and gardens on Kaile'una Island, one of the Trobriand Islands in the Milne Bay Province of Papua New Guinea. The data on the meaning of the place names…

  6. Landscape Terms and Place Names in the Trobriand Islands--The Kaile'una Subset

    ERIC Educational Resources Information Center

    Senft, Gunter

    2008-01-01

    After a brief introduction to the topic the paper first gives an overview of Kilivila landscape terms and then presents the inventory of names for villages, wells, island points, reef-channels and gardens on Kaile'una Island, one of the Trobriand Islands in the Milne Bay Province of Papua New Guinea. The data on the meaning of the place names

  7. Batkoa apiculata (Thaxter) Humber affecting Anopheles (Diptera: Culicidae) in the municipality of Una, Southern Bahia, Brazil

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Surveys for fungal pathogens affecting adult mosquitoes from the genus Anopheles were conducted in flooded and swamp-like natural breeding sites near residences in the center and suburbs of the city of Una as well as the nearby village of Outeiro in southern Bahia. Surveys of 54 mosquito breeding si...

  8. Cultivating "Una Persona Educada: A Sentipensante" (Sensing/Thinking) Vision of Education

    ERIC Educational Resources Information Center

    Rendon, Laura I.

    2011-01-01

    This essay focuses on the need to educate the new "persona educada", a dignified, honorable person with a good measure of social and personal responsibility who also possesses the habits of the mind and heart. To cultivate "una persona educada" requires a newly formed vision of education and pedagogy. Examples of three entrenched agreements that…

  9. Environmental control of reproductive phenology and the effect of pollen supplementation on resource allocation in the cleistogamous weed, Ruellia nudiflora (Acanthaceae)

    PubMed Central

    Munguía-Rosas, Miguel A.; Parra-Tabla, Victor; Ollerton, Jeff; Cervera, J. Carlos

    2012-01-01

    • Background and Aims Mixed reproductive strategies may have evolved as a response of plants to cope with environmental variation. One example of a mixed reproductive strategy is dimorphic cleistogamy, where a single plant produces closed, obligately self-pollinated (CL) flowers and open, potentially outcrossed (CH) flowers. Frequently, optimal environmental conditions favour production of more costly CH structures whilst economical and reliable CL structures are produced under less favourable conditions. In this study we explore (1) the effect of light and water on the reproductive phenology and (2) the effect of pollen supplementation on resource allocation to seeds in the cleistogamous weed Ruellia nudiflora. • Methods Split-plot field experiments were carried out to assess the effect of shade (two levels: ambient light vs. a reduction of 50 %) and watering (two levels: non-watered vs. watered) on the onset, end and duration of the production of three reproductive structures: CH flowers, CH fruit and CL fruit. We also looked at the effect of these environmental factors on biomass allocation to seeds (seed weight) from obligately self-pollinated flowers (CL), open-pollinated CH flowers and pollen-supplemented CH flowers. • Key Results CH structures were produced for a briefer period and ended earlier under shaded conditions. These conditions also resulted in an earlier production of CL fruit. Shaded conditions also produced greater biomass allocation to CH seeds receiving extra pollen. • Conclusions Sub-optimal (shaded) conditions resulted in a briefer production period of CH structures whilst these same conditions resulted in an earlier production of CL structures. However, under sub-optimal conditions, plants also allocated more resources to seeds sired from CH flowers receiving large pollen loads. Earlier production of reproductive structures and relatively larger seed might improve subsequent success of CL and pollen-supplemented CH seeds, respectively. PMID:22095920

  10. Anti-depressant-like effect of kaempferitrin isolated from Justicia spicigera Schltdl (Acanthaceae) in two behavior models in mice: evidence for the involvement of the serotonergic system.

    PubMed

    Cassani, Julia; Dorantes-Barrón, Ana María; Novales, Lilian Mayagoitia; Real, Guadalupe Alva; Estrada-Reyes, Rosa

    2014-01-01

    We evaluated the antidepressant-like effect of kaempferitrin (Km) isolated from the plant Justicia spicigera (Asteraceae), which is used in traditional medicine for relieving emotional disorders, such as "la tristeza" (sadness or dysthymia) and "el humor" (mood changes). The actions of Km were evaluated in a forced swimming test (FST) and a suspension tail test (TST) in mice. We explored the involvement of the serotonergic system and the hypothalamic-hypophysis-adrenal axis (HPA) in the antidepressant-like effect of Km. To evaluate nonspecific effects of Km on general activity, the open field test (OFT) was performed. Km at 5, 10, and 20 mg/kg induced an antidepressant-like effect. Sub-effective dose of Km (1 mg/kg) produced a synergistic effect with imipramine (6.25 mg/kg) and fluoxetine (10 mg/kg) but not with desipramine (3.12 mg/kg). Pretreatment with p-chlorophenylalanine methyl ester (PCPA), a serotonin synthesis inhibitor, N-{2-(4-(2-methoxyphenyl)-1-piperazinyl}-N-(2-pyridinyl)cyclohexecarboxamide (WAY-100635), a selective 5-HT1A receptor antagonist, and 8OH-DPAT, a selective 5-HT1A agonist, but not pindolol (10 mg/kg) blocked the anti- immobility effect induced by Km. Taken together, these results indicate that the antidepressant-like effect of Km is related to the serotonergic system, principally 5-HT1A. This effect was not related to changes in locomotor activity. PMID:25532842

  11. Pasado, presente y futuro de la epidemiología. Una perspective latinoamericana

    PubMed Central

    Morabia, Alfredo

    2015-01-01

    Este artículo intenta contestar tres preguntas. Sobre el pasado: ¿Por qué no existió una epidemiología precolombina? Sobre el presente: ¿Cuáles son los orígenes de la epidemiología moderna, incluyendo sus raíces sudamericanas? Y sobre el futuro, escogí un título surrealista para enfatizar el hecho que estoy consciente de que es siempre delicado hacer predicciones: ¿Por qué fenómenos complejos son los “objetos oscuros del deseo” epidemiológico? PMID:25124247

  12. Observaciones del disco solar y de una protuberancia quiescente en radiación ultravioleta

    NASA Astrophysics Data System (ADS)

    Cirigliano, D.; Vial, J.-C.; Rovira, M.

    Observaciones del disco solar y de una protuberancia quiescente en el rango de longitudes de onda ultravioleta fueron obtenidas con el instrumento CDS (Coronal Diagnostic Spectrograph) y SUMER (Solar Ultraviolet Measurements of emitted radiation) a bordo de la sonda SOHO. El propósito es investigar las velocidades macroscópicas de varias especies metálicas que se observan tanto en el disco solar como en el plasma de las protuberancias. Para calcular las velocidades del disco solar aplicamos una técnica mixta para modelar la distribución de estructuras en UV en el Sol quieto. Las velocidades macroscópicas en las protuberancias se calcularon a partir de los corrimientos Doppler en cada línea espectral y luego se tomaron las del disco solar como referencia. Obtuvimos valores absolutos para las velocidades macroscópicas entre 5 y 40 km/seg. También detectamos comportamientos diferentes en las velocidades de las protuberancias en el centro con respecto a los bordes.

  13. Desarrollo curricular, conciencia ambiental y tecnologia para estudiantes de intermedia: Una investigacion en accion

    NASA Astrophysics Data System (ADS)

    Rodriguez Ramos, Teresita

    Se llevó a cabo una investigación en acción con los propósitos de 1) documentar las relaciones de las tecnologías de la información y la comunicación en las clases de ciencias de escuela intermedia como elemento de apoyo cuando se aborda el tema ambiental y sus conceptos pertinentes, a partir de las observaciones de la investigadora, así como las entrevistas y diarios reflexivos de los estudiantes de una escuela intermedia en la zona metropolitana, y luego 2) diseñar una unidad instruccional sobre el tema ambiental que integre actividades tecnologías para el curso de ciencias de la escuela intermedia según el modelo PROCIC y las observaciones que hayan iniciado los estudiantes participantes. Finalmente, se plantearon las implicaciones educativas para el currículo del Programa de Ciencias al instrumentar este modelo de unidad mediante PROCIC, e integrado la tecnología y el tema ambiental. Los hallazgos se analizaron y se categorizaron de acuerdo con las preguntas de investigación. El hallazgo principal de la investigación aborda las cuatro relaciones centrales en las que se articula la utilización de las tecnologías y sus aplicaciones en la clase de ciencias. Estas cuatro relaciones que recogen la posición de los estudiantes son: 1) Perspectiva de los estudiantes hacia la tecnología. 2) Participación de los estudiantes en los aspectos docentes. 3) Aprendizaje estudiantil sobre el ambiente, y 4) Conciencia ambiental en relación con la vida diaria. Estas relaciones ponen de manifiesto,cómo se plantea en las implicaciones, la necesidad de más investigación en acción en la sala de clases, la importancia—como tema transversal—de la conciencia ambiental mediante la tecnología al construir conocimientos significativos dentro y fuera de la escuela, asó como, valorar la investigación y la dialogicidad en la sala de clases como actividades que obligan al reexamen de la práctica didáctica en su formas curriculares de objetivos, recursos, actividades, evaluación, entre otros. Estos planteamientos definen la unidad curricular que se propone en el cuatro capítulo.

  14. [Influence of antioxidant phenovin and immunomodulator Una de gato on free radical oxidation at parodontitis].

    PubMed

    Gogebashvili, N N; Dzhashi, L M; Datunashvili, I V; Intskirveli, N A; Kiparoidze, L I

    2009-04-01

    The aim of the research: detection of changes in free radical oxidation at treatment of parodontitis with combination of preparations - antioxidant Phenovin and immunomodulator Una de gato. Reactive compounds of nitrogen, oxygen and lipids in saliva, blood and gingival tissue of patients suffering from moderate form of parodontitis has been studied by means of the electronic paramagnetic resonance (EPR) method and spin-traps (DETC, DMPO, PBN - Sigma). In patients with parodontitis content of free NO in saliva and blood increases, while in gingival tissue - decreases. In saliva, blood and gingival tissue of patients intense EPR signals of superoxidradicals (O2(-)) and lipoperoxides (LOO(-)) has been revealed indicating intensification of processes of lipid peroxidation in oral cavity, as well as in whole organism of patient. Exaggerated synthesis of NO in saliva and blood of patient is determined by high- expression of inducible NO-synthase triggered by oxidative stress, and increased activity of neuronal NO-synthase in saliva as a result of high concentrations of metacholine and P substance intensely secreted at parodontitis. Decreased content of free NO in gingival tissue of patients with parodontitis compared to control is the result of biological degradation of nitric oxide (conversion of NO into peroxinitrite on the background of intense oxidative stress in oral cavity) and nitrosylation of mitochondrial electron transport proteins of gingival tissue (characteristic for parodontitis) with further decrease in content of free oxide, suppression of intensity of mitochondrial respiration, energogenesis, development of ischemia in oral tissue leading to further initiation of destructive processes and progression of parodontitis. Treatment with combination of preparations - Phenovin and Una de gato decreased intensity of oxidative stress in organism of patients and reduced destructive processes of tissues in oral cavity. Relative normalization of oxidative metabolism in organism, restoration of NO-synthase system activity (intensity of EPR signals of spin-trapped nitric oxide and lipoperoxide radicals approach to control data) has been observed. It is concluded that combined treatment of patients suffering from parodontitis using preparations of antioxidant and immunoregulatory activity results in long-term remission of disease. PMID:19430040

  15. La reconstrucción del seno después de una mastectomía

    Cancer.gov

    Hoja informativa que describe la reconstrucción del seno (mama) después de una mastectomía. Contiene información sobre las opciones quirúrgicas, los cuidados de seguimiento y los exámenes de detección del cáncer de seno después de la reconstrucción.

  16. "Una Luna Brilla."

    ERIC Educational Resources Information Center

    Teaching Music, 2002

    2002-01-01

    Focuses on the "World's Largest Concerts" listing various songs to be sung by students. Includes teaching tips in the form of quotes from music teachers on aspects of music education, such as teaching rhythm. Includes information on how to access the songs. (CMK)

  17. Geomorphological significance of the palaeodrainage network on a karst plateau: The Una-Korana plateau, Dinaric karst, Croatia

    NASA Astrophysics Data System (ADS)

    Bočić, Neven; Pahernik, Mladen; Mihevc, Andrej

    2015-10-01

    Karst plateaus often have a complex geological and geomorphological history. It is widely accepted that their development requires a long period of karst denudation. This study reconstructs the palaeodrainage network of a karst plateau, analyses its properties and establishes its geomorphological significance. The main purpose of this research was to deepen our understanding of a key stage in the evolution of karst plateaus - the transition from a fluvial land surface to one dominated by karst surface processes. The study was conducted on a large part of the Una-Korana plateau, the largest plateau in the Dinaric karst. The majority of the plateau is made of carbonate rocks of Triassic, Jurassic and Cretaceous age that set the conditions for the development of the karst. We have reconstructed the palaeodrainage network based on 1:25,000 topographic maps with 10 m contours. The transition of the surface drainage network to the underground karst drainage network is still in progress, so, depending on the degree of karstification, the drainage network was divided into three categories: active, dry and relict. It was found that 90.5% of the pre-existing drainage network has undergone some degree of karstification. The active surface drainage network gradually shifted to a dry network, then to a relict network. The surface drainage network is gradually replaced by a dense network of dolines. Today, the flat and karstified inter-fluvial area is drained underground towards the main watercourses and these drain the entire region over the surface towards the Pannonian basin. This is the largest known karst palaeodrainage network in the Dinaric karst that has been reconstructed in this way.

  18. Regiones de formación de la línea de He II λ 1640 en una atmósfera en expansión

    NASA Astrophysics Data System (ADS)

    Venero, R.; Cidale, L.; Ringuelet, A.

    Se calculan perfiles de la línea del He II λ1640 empleando un modelo de atmósfera en expansión con una estructura cromosférica para determinar la región de formación de la línea. El problema se trata en geometría esférica, fuera de equilibrio termodinámico. La ecuación de transporte radiativo se resuelve rigurosamente en el marco de referencia del fluído para distintas leyes de velocidad, monótonamente crecientes, y diferentes leyes de temperatura. Se buscan relaciones globales entre las características del perfil y los parámetros físicos atribuídos a la atmósfera estelar, con la finalidad de definir una herramienta de diagnóstico de las propiedades del medio.

  19. Informe Anual a la Nación sobre el Estado del Cáncer con una sección especial sobre la prevalencia d

    Cancer.gov

    El Informe Anual a la Nación sobre el Estado del Cáncer (1975 a 2010), mostró un descenso más acelerado que en años anteriores de los índices de mortalidad por cáncer de pulmón. También contiene una sección especial que destaca los efectos significativos

  20. Determinación de la orientación global SAO-Hipparcos mediante una expansión en armónicos vectoriales

    NASA Astrophysics Data System (ADS)

    Cionco, R. G.; Vucetich, H.; Orellana, R.; Arias, E. F.

    En base a las diferencias de posición y movimientos propios de 101352 estrellas con posición SAO observadas por HIPPARCOS y utilizando la naturaleza vectorial de esas diferencias, determinamos 6 parámetros de orientación global (3 de rotación y 3 de desplazamiento axial), para los sistemas de referencia asociados a los marcos mencionados, mediante una descomposición en serie de armónicos vectoriales ortogonales.

  1. Tratamiento Quirúrgico de los Meningiomas del Foramen Óptico, Técnicay Resultados de una Serie de 18 Pacientes

    PubMed Central

    Goldschmidt, Ezequiel; Ajler, Pablo; Campero, Álvaro; Landriel, Federico; Sposito, Maximiliano; Carrizo, Antonio

    2014-01-01

    Introducción: los meningiomas del foramen óptico producen un rápido deterioro de la función visual aún cuando su tamaño es pequeño, por eso su diagnóstico y manejo difiere del resto de los meningiomas clinoideos. El propósito de este estudio es presentar la técnica y los resultados de nuestro manejo quirúrgico de meningiomas foraminales (MF). Pacientes y Métodos: se llevó a cabo una revisión de las historias clínicas de 47 pacientes con meningiomas primarios intraorbitarios. Se realizaron 52 cirugías en los pacientes con MF. Se empleó una craneotomía fronto-orbitaria, seguida de una descompresión extradural del canal óptico, resección del componente intraorbitario y exploración intradural del nervio óptico. Resultados: de los 12 pacientes con MF que presentaban la visión conservada, la agudeza visual fue preservada en 7 casos, mejoró en 2, y empeoró en 3. En 18 pacientes, el principal síntoma fue exoftalmos y en 35 pacientes ceguera unilateral. Ocurrieron 6 recurrencias, 2 a 10 años después de la resección quirúrgica. Cinco de ellos fueron reoperados. Se indicó radioterapia después de la recurrencia en 3 pacientes. Conclusión: el manejo de los MF continúa siendo controvertido y frecuentemente se propone un tratamiento conservador. Basados en nuestros hallazgos de frecuente extensión intracraneal, proponemos realizar una resección total o subtotal del tumor, preservando el nervio óptico en pacientes con visión prequirúrgica conservada. PMID:25165616

  2. El Instituto Nacional del Cáncer de EE. UU. y Perú firman una Declaración de Intención

    Cancer.gov

    El Instituto Nacional del Cáncer y la República del Perú firmaron una declaración de intención para compartir el interés en fomentar la investigación biomédica de oncología, basándose en la colaboración mutua de ambas entidades, así como el objetivo común

  3. Diseno de una Actividad de Aprendizaje Basada en la Argumentacion Dialogica en un curso Virtual de Biotecnologia y su Incidencia en el Desarrollo de Competencias Cientificas

    NASA Astrophysics Data System (ADS)

    Ortiz Benavides, Fedra Lorena

    El proposito de la investigacion fue evaluar la efectividad de una actividad de aprendizaje basado en la argumentacion dialogica en linea y su incidencia en el desarrollo de competencias cientificas. Se fundamenta en la teoria del aprendizaje socio cultural de Vigotsky (1984), los principios del diseno instruccional de la cognicion situada por Hung y Der-Thang (2001) y como estrategia se aplico la argumentacion dialogica utilizando el Modelo Argumentativo de Toulmin MAT (1984). El diseno experimental comparo dos grupos de estudiantes A y B en el curso virtual de Biotecnologia. El grupo A (experimental) desarrollo la discusion a partir de la estrategia disenada para este estudio y el grupo B (control) realizo la discusion desde las actividades tradicionales. El desarrollo de la competencia argumentativa se valoro con el instrumento de evaluacion para argumentacion dialogica en linea propuesta por Clark y Sampson (2008). La evaluacion de las competencias cientificas se realizo a partir de una postprueba. Los datos fueron analizados con pruebas estadisticas no parametricas. Los resultados de la investigacion, indicaron diferencias significativas en el nivel de la competencia argumental en el grupo experimental en comparacion al grupo control. Igualmente se demostro que existe una relacion positiva entre el nivel de desarrollo de la competencia argumentativa y el nivel de desarrollo de las competencias cientificas.

  4. Seismicity in 2010 and major earthquakes recorded and located in Costa Rica from 1983 until 2012, by the local OVSICORI-UNA seismic network

    NASA Astrophysics Data System (ADS)

    Ronnie, Q.; Segura, J.; Burgoa, B.; Jimenez, W.; McNally, K. C.

    2013-05-01

    This work is the result of the analysis of existing information in the earthquake database of the Observatorio Sismológico y Vulcanológico de Costa Rica, Universidad Nacional (OVSICORI-UNA), and seeks disclosure of basic seismological information recorded and processed in 2010. In this year there was a transition between the software used to record, store and locate earthquakes. During the first three months of 2010, we used Earthworm (http://folkworm.ceri.memphis.edu/ew-doc), SEISAN (Haskov y Ottemoller, 1999) and Hypocenter (Lienert y Haskov, 1995) to capture, store and locate the earthquakes, respectively; in April 2010, ANTELOPE (http://www.brtt.com/software.html) start to be used for recording and storing and GENLOC (Fan at al, 2006) and LOCSAT (Bratt and Bache 1988), to locate earthquakes. GENLOC was used for local events and LOCSAT for regional and distant earthquakes. The local earthquakes were located using the 1D velocity model of Quintero and Kissling (2001) and for regional and distant earthquakes IASPEI91 (Kennett and Engdahl, 1991) was used. All the events for 2010 and shown in this work were rechecked by the authors. We located 3903 earthquakes in and around Costa Rica and 746 regional and distant seismic events were recorded (see Figure 1). In this work we also give a summary of major earthquakes recorded and located by OVSICORI-UNA network between 1983 and 2012. Seismicity recorded by OVSICORI-UNA network in 2010

  5. Identification of Suitable Water Harvesting Zones Based on Geomorphic Resources for Drought Areas: A Case Study of Una District, Himachal Pradesh, India.

    NASA Astrophysics Data System (ADS)

    Prakasam, D. C., Jr.; Zaman, B.

    2014-12-01

    Water is one of the most vital natural resource and its availability and quality determine ecosystem productivity, both for agricultural and natural systems. Una district is one of the major potential agricultural districts in Himachal Pradesh, India. More than 70% of the population of this district is engaged in agriculture and allied sectors and major crops grown are maize, wheat, rice, sugarcane, pulses and vegetables. The region faces drought every year and about 90 per cent of the area is water stressed. This has resulted in crop loss and shortage of food and fodder. The sources of drinking water, small ponds and bowlies dry-up during summer season resulting in scarcity of drinking water. Una district receives rainfall during monsoons from June to September and also during non-monsoon period (winter). The annual average rainfall in the area is about 1040 mm with 55 average rainy days. But due to heavy surface run-off the farmers not able to cultivate the crops more than once in a year. Past research indicate that the geomorphology of the Una district might be responsible for such droughts as it controls the surface as well as ground water resources. The research proposes to develop a water stress model for Una district using the geomorphic parameters, water resource and land use land cover data of the study area. Using Survey of India topographical maps (1:50000), the geomorphic parameters are extracted. The spatial layers of these parameters i.e. drainage density, slope, relative relief, ruggedness index, surface water body's frequency are created in GIS. A time series of normalized remotely sensed data of the study area is used for land use land cover classification and analyses. Based on the results from the water stress model, the drought/water stress areas and water harvesting zones are identified and documented. The results of this research will help the general population in resolving the drinking water problem to a certain extent and also the cultivators to water the crops more than twice per year which might increase the crop yield in Una district.

  6. Reconexión magnética en una región activa en decaimiento

    NASA Astrophysics Data System (ADS)

    Mandrini, C. H.; Démoulin, P.; van Driel-Gesztelyi, L.; Schmieder, B.; Bagalá, L. G.; Rovira, M. G.

    Se han obtenido observaciones desde Tierra (Hα y magnetogramas) coordinadas con el Soft X-ray Telescope (SXT), a bordo del satélite japonés Yohkoh, de una región activa bipolar en decaimiento. Estos datos constituyen la base para el estudio de un punto brillante en rayos X (PBX) y de la actividad relacionada con el mismo en distintas capas de la atmósfera solar. Las observaciones muestran que el PBX está relacionado con la aparición de un bipolo menor (~ 1020 Mx) y que su abrillantamiento continuo, así como sus aumentos de brillo esporádicos (``fulguraciones"), son el resultado de la reconexión entre el pequeño arco emergente (visto en Hα como un sistema de filamentos arqueados, SFA) y arcos mayores asociados al campo facular preexistente. Se ha extrapolado el campo magnético observado en la aproximación libre de fuerzas lineal y se ha seguido su evolución a lo largo de la vida del PBX. Se ha calculado la posición de las cuasiseparatrices (CSs) a partir del campo modelado. Las líneas de campo extrapoladas, cuyas bases fotosféricas se encuentran a ambos lados de las CSs, están de acuerdo con las estructuras cromosféricas y coronales observadas. Se ha calculado el espesor de la CD ubicada a lo largo de la polaridad negativa emergente, encontrándose que su variación está de acuerdo con la evolución de la intensidad del PBX; la CS es muy delgada durante la vida del PBX (~ 100 m), mientras que su espesor aumenta considerablemente (>= 10^4 m) cuando el PBX desaparece de las imágenes del SXT. Estos resultados señalan que el abrillantamiento y las ``fulguraciones" de este PBX se deben al proceso de reconexión en 3D que tiene lugar en las CSs.

  7. EL PROGRAMA CITI: UNA ALTERNATIVA PARA LA CAPACITACIÓN EN ÉTICA DE LA INVESTIGACIÓN EN AMÉRICA LATINA

    PubMed Central

    Litewka, Sergio; Goodman, Kenneth; Braunschweiger, y Paul

    2011-01-01

    El Programa CITI (Collaborative Institutional Training Initiative) es un curso basado en Internet y desarrollado por voluntarios, que brinda material educacional sobre protección de sujetos humanos en investigaciones biomédicas y de conducta, buenas prácticas clínicas, conducta responsable de la investigación y trato humanitario a animales de laboratorio. Es un esfuerzo conjunto del Fred Hutchinson Cancer Research Center y la Universidad de Miami. Con la colaboración de expertos locales, gran parte del contenido se ha adaptado para América Latina, se ha traducido al español y portugués y se han establecido acuerdos de colaboración con instituciones especializadas en bioética en Chile, Brasil, Costa Rica y Perú. Los autores presentan una metodología accesible para la capacitación en ética de la investigación y una justificación de su uso y difusión en América Latina PMID:21687817

  8. Invertebrate fauna associated with Torpedograss, Panicum repens (Cyperales: Poaceae), in Lake Okeechobee, Florida, and prospects for biological control

    SciTech Connect

    Cuda, J.P.; Dunford, J.C.; Leavengood, J.M. Jr.

    2007-03-15

    Torpedograss, Panicum repens L., is an adventive, rhizomatous grass species that has become an invasive weed of terrestrial, wetland, and aquatic environments in tropical and subtropical regions worldwide. Until recently, strategies for controlling torpedograss in the USA have focused almost exclusively on mechanical and chemical methods, either alone or in combination, with varied results. A survey of the arthropods and nematodes currently associated with the plant in Lake Okeechobee, Florida, was conducted as part of a feasibility study to determine whether torpedograss is an appropriate target for a classical biological control program. Overall, approximately 4,000 arthropods and 400 nematode specimens were collected. Sweep, clipped vegetation, and soil core samples were dominated by representatives of the arthropod orders Hemiptera, Hymenoptera, Diptera, and Acari. Lesion nematodes of the genus Pratylenchus were commonly associated with the roots of torpedograss. None of the organisms collected were torpedograss specialists. Although classical biological control of torpedograss is feasible based on the extent of the infestation, economic losses, resistance to conventional controls, and the report of a potentially host specific natural enemy in India, the botanical position of this grass weed will require a formal risk assessment before proceeding with a classical biological control program. (author) [Spanish] La conota, Panicum repens L., es una especie foranea de pasto que produce rizomas que ha convertido en ser una maleza invasora de ambientes terrestres, pantanosos y acuaticos en regiones tropicales y subtropicales en todo el mundo. Hasta hace un tiempo reciente, las estrategias para controlar conota en los EEUU eran enfocadas casi exclusivamente en los metodos mecanicos y quimicos, solos o en combinacion, con resultados variables. Un muestreo de los artropodos y nematodos asociados corrientemente con esta planta en el Lago de Okeechobee, Florida, fue realizado como parte de un estudio de factibilidad para determinar si conota es una candidata apropiada para un programa de control biologico clasico. En general, especimenes de aproximadamente unos 4,000 artropodos y unos 400 nematodos fueron recolectados. Muestras recolectadas pasando una red sobre vegetacion mezclada, cortando la vegetacion y tomando centros del suelo fueron dominados por representantes de artropodos de los ordenes de Hemiptera, Hymenoptera, Diptera, y Acari. Nematodos en el genero Pratylenchus, que causan lesiones sobre tejido, fueron asociados regularmente con las raices de conota. Ninguno de los organismos recolectados eran especialistas sobre conota. Aunque el control biologico clasico de la conota es factible basado sobre la magnitud de la infestacion, las perdidas economicas, la resistencia hacia los metodos de control convencionales y el informe en la India de un posible enemigo natural especifico a esta planta, la posicion botanica de este pasto maleza requiere una evaluacion de riesgo economico formal antes de continuar con un programa de control biologico clasico. (author)

  9. Review of antiviral and immunomodulating properties of plants of the Peruvian rainforest with a particular emphasis on Una de Gato and Sangre de Grado.

    PubMed

    Williams, J E

    2001-12-01

    Viral diseases, including emerging and chronic viruses, are an increasing worldwide health concern. As a consequence, the discovery of new antiviral agents from plants has assumed more urgency than in the past. A number of native Amazonian medicines of plant origin are known to have antimicrobial and anti-inflammatory activity, although only a few have been studied for their antiviral properties and immunomodulating effects. Those most studied include: Sangre de Grado (drago) (Croton lechleri) in the Euphorbiaceae family and Una de Gato (Uncaria tomentosa) in the Rubiaceae family. This article reviews the chemical composition, pharmacological properties, state of current research, clinical use, and potential antiviral and immunomodulating activity of these and other plants from the Peruvian Amazon. PMID:11804547

  10. Las propiedades de las estrellas extrañas en el marco de una nueva ecuación de estado para la materia extraña

    NASA Astrophysics Data System (ADS)

    Lugones, G.; Benvenuto, O. G.

    Se estudian las propiedades generales de las estrellas constituídas por materia extraña (ME) en el marco de una nueva ecuación de estado (EOS) en la que consideramos la masa de los quarks como dependiente del número medio de bariones por unidad de volumen. Se asume esta dependencia de forma que los quarks sean livianos (pesados) a densidades altas (bajas). En esta aproximación, la EOS de la ME es similar a la predicha por el modelo de la Bolsa del MIT, pero es significativamente mas dura a bajas densidades. Esta propiedad modifica las propiedades de las estrellas extrañas en forma notable. Encontramos que, con esta nueva EOS, los objetos pueden ser más masivos que en el caso de la EOS de la bolsa del MIT y que, además, pueden presentar mayores redshifts gravitatorios en hasta un 10%. En el caso de las oscilaciones radiales de estos objetos, calculamos la relación período vs. redshift gravitacional y encontramos una expresión analítica simple para el caso de las oscilaciones de objetos de baja masa. Encontramos que, aún con hipótesis muy diferentes en cuanto a la ecuación de estado de la materia extraña, las propiedades generales de estos objetos no se ve afectada en forma fundamental, y, por lo tanto, no deberían ser muy diferentes de las aquí expuestas.

  11. Síndrome del Outlet Torácico: ¿Una Patología Siempre Quirúrgica? Análisis de una Serie de 31 Cirugías Realizadas por Vía Supraclavicular Serie clínica

    PubMed Central

    Socolovsky, Mariano; Di Masi, Gilda; Binaghi, Daniela; Campero, Álvaro; Páez, Miguel Domínguez; Dubrovsky, Alberto

    2014-01-01

    Introducción: El síndrome de outlet torácico es una compresión del plexo braquial que suscita polémica. Se clasifica en Outlet Torácico Verdadero o neurogénico (OTV) y Outlet Torácico Disputado o no neurogénico (OTD). El primero presenta síntomas motores en la mano, mientras que el segundo sólo síntomas sensitivos en el miembro superior. El objetivo de este trabajo es analizar los resultados obtenidos en una serie de 31 cirugías. Métodos: Se analizaron las cirugías de nervios efectuadas entre 2003-2012, tomando los diagnósticos de outlet torácico cuyo período de seguimiento post-operatorio mínimo fuera de 6 meses. Se buscaron los siguientes datos: edad, sexo, presencia de síntomas sensitivos y/o motores, clasificación, resultado de los estudios neurofisiológicos y de imágenes, resultado de la cirugía, complicaciones post-operatorias y recidivas. Resultados: Se incluyeron 31 cirugías realizadas en 30 pacientes, 9 OTV (8 mujeres) de 24.3 años, y 21 con OTD (18 mujeres) de 37.4 años de edad en promedio. Un 90% presentaron alteraciones neurofisiológicas preoperatorias, y 66,6% imagenológicas. En el intraoperatorio, el 100% de los OTV presentó una alteración anatómica relacionada con la sintomatología, hecho observado sólo en el 36.7% de los OTD operados. El 87,5% de los OTV mejoraron sensitivamente, mientras que 77,7% mejoraron la atrofia. Por el contrario, 45.4% de los OTD mejoraron permanentemente, 36.3% no tuvieron cambios, 13.6% mejoraron transitoriamente y 4.5% (un caso) empeoró. Las complicaciones post-operatorias fueron más frecuentes aunque transitorias en el grupo de OTV (3 casos sobre 9 operados, 33.3%) que en los OTD (3 casos sobre 22, un 13.6%). Conclusión: El OTV suele mayormente mejorar luego de la cirugía, igual que el OTD aunque en una proporción mucho menor. Estos hallazgos coinciden con otros reportes recientes de esta patología. PMID:25165614

  12. CONTAMINACIÓN AMBIENTAL, VARIABILIDAD CLIMÁTICA Y CAMBIO CLIMÁTICO: UNA REVISIÓN DEL IMPACTO EN LA SALUD DE LA POBLACIÓN PERUANA

    PubMed Central

    Gonzales, Gustavo F.; Zevallos, Alisson; Gonzales-Castañeda, Cynthia; Nuñez, Denisse; Gastañaga, Carmen; Cabezas, César; Naeher, Luke; Levy, Karen; Steenland, Kyle

    2015-01-01

    RESUMEN El presente artículo es una revisión sobre la contaminación del agua, el aire y el efecto del cambio climático en la salud de la población peruana. Uno de los principales contaminantes del aire es el material particulado menor de 2,5 μ (PM 2,5), en la ciudad de Lima, anualmente 2300 muertes prematuras son atribuibles a este contaminante. Otro problema es la contaminación del aire domiciliario por el uso de cocinas con combustible de biomasa, donde la exposición excesiva a PM 2,5 dentro de las casas es responsable de aproximadamente 3000 muertes prematuras anuales entre adultos, con otro número desconocido de muertes entre niños debido a infecciones respiratorias. La contaminación del agua tiene como principales causas los desagües vertidos directamente a los ríos, minerales (arsénico) de varias fuentes, y fallas de las plantas de tratamiento. En el Perú, el cambio climático puede impactar en la frecuencia y severidad del fenómeno de El Niño oscilación del sur (ENSO) que se ha asociado con un incremento en los casos de enfermedades como cólera, malaria y dengue. El cambio climático incrementa la temperatura y puede extender las áreas afectadas por enfermedades transmitidas por vectores, además de tener efecto en la disponibilidad del agua y en la contaminación del aire. En conclusión, el Perú, pasa por una transición de factores de riesgo ambientales, donde coexisten riesgos tradicionales y modernos, y persisten los problemas infecciosos y crónicos, algunos de los cuales se asocian con problemas de contaminación de agua y de aire. PMID:25418656

  13. La preparacion en ciencia de los candidatos a maestros del nivel elemental primario segun la reforma de la educacion cientifica en Puerto Rico: Una propuesta de secuencia curricular

    NASA Astrophysics Data System (ADS)

    Rodriguez Plaza, Evelyn

    El proposito de esta investigacion fue identificar los componentes de la preparacion en ciencia que deben recibir los estudiantes del Bachillerato en Artes en Educacion Elemental, Nivel Primario, de acuerdo a los documentos que dirigen la reforma de la educacion cientifica en Puerto Rico. Tambien, se identificaron los componentes de los cursos que forman parte de la preparacion en ciencia de estos estudiantes. Se compararon los componentes de la preparacion en ciencia y los componentes de los cursos para determinar congruencias y discrepancias. Con los datos recopilados se identificaron los componentes de los cursos de una secuencia curricular para la preparacion en ciencia de los candidatos a maestros del nivel elemental primario. La secuencia curricular que se propone en esta investigacion incluye cursos de contenido cientifico y de metodologia en la ensenanza de la ciencia disenados para satisfacer las necesidades de los candidatos. Se recomienda que en los procesos para el diseno, la implantacion y la evaluacion de estos cursos participen profesores de ciencia, profesores de educacion y maestros del nivel elemental primario. Todos los cursos de la secuencia curricular deben tener un enfoque constructivista. Las experiencias educativas que se incluyan en los cursos deben aspirar a desarrollar en los candidatos los atributos de la cultura cientifica y actitudes positivas hacia la ciencia y hacia la ensenanza de esta disciplina. El modelaje por parte de los profesores que ensenen los cursos de la secuencia curricular es fundamental en el desarrollo profesional de los candidatos. Se recomienda que en los cursos de contenido cientifico se estudien los conceptos y los conocimientos cientificos que forman parte del curriculo de Kindergarten a tercer grado de forma integrada y con una profundidad universitaria. Estos cursos deben tener un enfoque interdisciplinario e incluir el estudio de la naturaleza de la ciencia y un componente de laboratorio para desarrollar los procesos de la ciencia y las destrezas de la investigacion cientifica. En los cursos de metodologia en la ensenanza de la ciencia se deben estudiar los modelos, los metodos, las estrategias y las tecnicas mas efectivas para la ensenanza y el aprendizaje de la ciencia, asi como las tecnicas de avaluacion.

  14. A'Una ("Let's Go!")

    ERIC Educational Resources Information Center

    Brescia, Bill

    The guide, intended to aid students (grades four and above) in making their bodies a good home for their spirit, provides a variety of athletic activities and traditional Indian recipes for use in the classroom or in cultural programs. Apart from running (the major American Indian means of maintaining physical fitness), instructions are given for…

  15. TEMAS PARA UNA BIOETICA LATINOAMERICANA

    PubMed Central

    Yunta, Eduardo Rodriguez

    2009-01-01

    El presente trabajo reflexiona sobre el fundamento filosófico de la bioética como disciplina, método y movimiento desde su contexto histórico y en relación con el contexto social y cultural de la vivencia latinoamericana. PMID:20209030

  16. A screen of chemical modifications identifies position-specific modification by UNA to most potently reduce siRNA off-target effects

    PubMed Central

    Bramsen, Jesper B.; Pakula, Malgorzata M.; Hansen, Thomas B.; Bus, Claus; Langkjær, Niels; Odadzic, Dalibor; Smicius, Romualdas; Wengel, Suzy L.; Chattopadhyaya, Jyoti; Engels, Joachim W.; Herdewijn, Piet; Wengel, Jesper; Kjems, Jørgen

    2010-01-01

    Small interfering RNAs (siRNAs) are now established as the preferred tool to inhibit gene function in mammalian cells yet trigger unintended gene silencing due to their inherent miRNA-like behavior. Such off-target effects are primarily mediated by the sequence-specific interaction between the siRNA seed regions (position 2–8 of either siRNA strand counting from the 5′-end) and complementary sequences in the 3′UTR of (off-) targets. It was previously shown that chemical modification of siRNAs can reduce off-targeting but only very few modifications have been tested leaving more to be identified. Here we developed a luciferase reporter-based assay suitable to monitor siRNA off-targeting in a high throughput manner using stable cell lines. We investigated the impact of chemically modifying single nucleotide positions within the siRNA seed on siRNA function and off-targeting using 10 different types of chemical modifications, three different target sequences and three siRNA concentrations. We found several differently modified siRNAs to exercise reduced off-targeting yet incorporation of the strongly destabilizing unlocked nucleic acid (UNA) modification into position 7 of the siRNA most potently reduced off-targeting for all tested sequences. Notably, such position-specific destabilization of siRNA–target interactions did not significantly reduce siRNA potency and is therefore well suited for future siRNA designs especially for applications in vivo where siRNA concentrations, expectedly, will be low. PMID:20453030

  17. Learning Astronomy by Playing in a Park. (Spanish Title: Aprender AstronoMía Jugando en Una Plaza.) Aprender Astronomia Brincando em Uma Praça

    NASA Astrophysics Data System (ADS)

    Camino, Néstor

    2012-12-01

    Some public-square games are presented in this paper, considered as didactic modules to help children imagine astronomical processes, based on the concept that learning in Astronomy should be developed to strengthen the relationship of our body with three-dimensional space and time, much in the same way we experience when observing the actual sky, holding a permanent "dialogue" between the actual world and what is to be learned. The games presented (merry-go-rounds and slides) were designed to work on the astronomical concepts related to the translation of the Earth around the Sun, the phases of the Moon and gravity, and on what is perceived by an observer about those phenomena. The description of each game, their physical and astronomical foundations, and a critical comment about their didactical importance are the key parts of the paper. Finally, a recommendation is given about the role teachers should play to be essential partners in the process of learning Astronomy by means of the interaction with these games. Se presentan en este trabajo algunos juegos de plaza, considerados como módulos didácticos para imaginar procesos astronómicos, a partir de la concepción de que el aprendizaje en Astronomía debe desarrollarse fortaleciendo la relación del propio cuerpo con el espacio tridimensional y con el tiempo, tal como se vive al observar el cielo, construyendo un "diálogo" entre el mundo real y los aprendizajes a construir. Los juegos presentados (calesitas y toboganes) fueron diseñados para trabajar sobre la traslación de la Tierra en torno al Sol, las fases de la Luna y la gravedad, y sobre lo que un observador percibe de los mismos. Se da la descripción de cada juego, se discuten sus fundamentos físicos y astronómicos, y se desarrolla una crítica didáctica de los mismos. Finalmente, se comenta el rol que deberían tener los docentes en el acompañamiento a los aprendices en el proceso de interacción con los juegos presentados. Apresentam-se neste trabalho alguns jogos de praça, considerados como módulos didáticos para imaginar processos astronômicos, a partir da concepção de que a aprendizagem em Astronomia deve-se desenvolver fortalecendo a relação do próprio corpo com o espaço tridimensional e com o tempo, tal como se vive ao observar o céu, construindo um "diálogo" entre o mundo real e as aprendizagens a construir. Os jogos apresentados (carrosséis e tobogãs) foram desenhados para trabalhar sobre a translação da Terra em torno do Sol, as fases da Lua e a gravidade, e sobre o que um observador percebe dos mesmos. Dá-se a descrição de cada jogo, discutem-se seus fundamentos físicos e astronômicos, e desenvolve-se uma crítica didática dos mesmos. Finalmente, comenta-se o papel que deveriam ter os docentes no apoio aos aprendizes no processo de interação com os jogos apresentados.

  18. Revision curricular a partir de un analisis comparativo de las discrepancias en los curriculos de una escuela de optometria en Puerto Rico con las competencias requeridas para las agencias de revalida y acreditacion 2004

    NASA Astrophysics Data System (ADS)

    Rivera Pacheco, Andres

    El proposito de esta investigacion, un estudio cualitativo de caso, fue comparar y contrastar el curriculo vigente de la Escuela de Optometria de la UIAPR con las competencias y estandares requeridos por las agencias de acreditacion y de revalida. Con este proposito, decidimos realizar una revision y un analisis de documentos: el prontuario de cada uno de los cursos de los curriculos implantados en el 1993 y en el 2001; las competencias y estandares establecidos por las agencias de revalida y de acreditacion; y las estadisticas en las que se analiza el porcentaje de estudiantes que aprueban cada una de las partes de los examenes de revalida entre el 1998 al 2003. Se realizaron entrevistas dirigidas para dar apoyo y complementar la revision y el analisis de estos documentos. Los participantes de las entrevistas fueron tres estudiantes de la clase de optometria del 2004 (ultima clase del curriculo del 1993); tres estudiantes de la clase de optometria del 2005 (primera clase graduanda del curriculo vigente) y tres profesores y/o directores de los Departamentos de Ciencias Basicas, Ciencias Clinicas y Cuidado al Paciente. Esta investigacion se enmarco en el modelo de evaluacion curricular de discrepancia de Malcolm Provus y en el modelo de desarrollo basado en competencias. Uno de los hallazgos mas importantes del estudio es que los cambios que se implantaron al curriculo del 2001 no han logrado que los estudiantes mejoren su ejecucion en los examenes de revalida. Por otro lado, se encontro que el curriculo vigente atiende completamente los estandares de la practica de Optometria, pero no las competencias. Esta informacion fue validada mediante el uso de una tabla de cotejo para el analisis de los cursos y de la informacion obtenida de las entrevistas. El estudio determina y concluye que existen discrepancias entre los prontuarios de los cursos del curriculo y las competencias requeridas por la agencia de revalida. Segundo, que el Departamento de Ciencias Basicas es el que presenta mas deficiencias en el desarrollo de las competencias. El investigador recomienda disenar e implantar un curriculo basado en competencias y proveer formacion en didactica y procesos de aprendizaje a los profesores.

  19. Adapting a Common Photographic Camera to Take Pictures of the Sky. (Spanish Title: Adaptando Una Camara Fotografica Comun Para Obtener Fotografias del Cielo.) Adaptando Uma Câmera Fotográfica Manual Simples Para Fotografar o Céu

    NASA Astrophysics Data System (ADS)

    Danhoni Neves, Marcos Cesar; Pereira, Ricardo Francisco

    2007-12-01

    In this paper will be introduced a method of astrophotography using a non-reflex photographic camera (a low-cost method). It will be revised some photographic processes commonly used nowadays for comparison with the aims of this paper. En este trabajo será introducido un método de astrofotografia que utiliza una cámara fotográfica non-reflex (un método de bajo costo). Serán revisados algunos procesos fotográficos comúnmente utilizados actualmente para comparación con los objetivos de este trabajo. O presente artigo procura introduzir um método de astrofotografia utilizando uma câmera fotográfica não reflex, de baixo custo. É feita uma revisão do processo fotográfico comumente empregado para fins de comparação com os objetivos pretendidos no presente trabalho.

  20. In vivo efficacy and off-target effects of locked nucleic acid (LNA) and unlocked nucleic acid (UNA) modified siRNA and small internally segmented interfering RNA (sisiRNA) in mice bearing human tumor xenografts

    PubMed Central

    Mook, ORF; Vreijling, Jeroen; Wengel, Suzy L; Wengel, Jesper; Zhou, Chuanzheng; Chattopadhyaya, Jyoti; Baas, Frank

    2010-01-01

    The clinical use of small interfering RNA (siRNA) is hampered by poor uptake by tissues and instability in circulation. In addition, off-target effects pose a significant additional problem for therapeutic use of siRNA. Chemical modifications of siRNA have been reported to increase stability and reduce off-target effects enabling possible therapeutic use of siRNA. Recently a large scale direct comparison of the impact of 21 different types of novel chemical modifications on siRNA efficiency and cell viability was published.1 It was found that several types of chemical modifications could enhance siRNA activity beyond that of an unmodified siRNA in vitro. In addition, a novel siRNA design, termed small internally segmented interfering RNA (sisiRNA), composed of an intact antisense strand and segmented guide strand stabilized using LNA was shown to be effective in cell based assays. In the present study we examined the in vivo efficacy of the LNA and UNA modified siRNA and sisiRNA in a mouse model bearing human tumor xenografts. We studied the biodistribution and efficacy of target knockdown in the mouse model. In addition we used whole genome profiling to assess the off-target effects in the liver of the mouse and the tumor xenografts. We report that LNA and UNA modified siRNA and sisiRNA improve the efficacy in target knockdown as compared with unmodified siRNA in the tumor xenografts without formulation. However, the level of off-target gene regulation in both the tumor and the liver correlated with the increase in efficacy in target knockdown, unless the seed region of the siRNA was modified. PMID:21687525

  1. The Moon Phases in a Paper Box. (Spanish Title: Las Fases de la Luna en Una Caja de Cartón.) As Fases da Lua Numa Caixa de Papelão

    NASA Astrophysics Data System (ADS)

    de Fátima O. Saraiva, Maria; Amador, Cláudio B.; Kemper, Érico; Goulart, Paulo; Muller, Angela

    2007-12-01

    We present a very simple concrete model to demonstrate the concept of phases of an illuminated body. The main objective of our model is to help the understanding of the Moon phases as viewed from the perspective of an observer on Earth. The material allows the visualization of two important effects: (1st) even though all the time half Moon is illuminated by the Sun, we see different fractions of the illuminated Moon surface, depending on our angle of sight; (2nd) the orientation of the convex part of the Moon in the crescent and waning phases on the sky also depends on our perspective from Earth. The use of a closed box allows one to see the contrast among the different phases with no need of a dark room. We also present a text on the Moon phases, emphasizing the dependence of the aspect of the bright part on the angle of sight. En este trabajo proponemos la construcción de material didáctico de bajo costo para demostración del concepto de fases de un cuerpo iluminado. El principal objetivo de nuestro material es facilitar la comprensión de las fases de la Luna desde la perspectiva de un observador en la Tierra. El material ayuda la visualización de dos efectos importantes: (1º) a pesar de tener siempre la mitad de la Luna (representada por una bolita de espuma plástica o de ping-pong), iluminada por el Sol ( representado por una fuente de luz natural o artificial), vemos diferentes fracciones de su superficie iluminada, dependiendo del ángulo por el cual la vemos; (2º) la orientación del borde convexo de la Luna en las fases Creciente y Menguante también depende de la perspectiva por la cual la miramos desde la Tierra. El uso de una caja cerrada permite observar el contraste entre las diferentes fases sin necesidad de estar en un recinto oscuro. Presentamos también un texto explicativo sobre las fases de la Luna, enfatizando la dependencia de la apariencia de la parte iluminada con el ángulo de visión. Neste trabalho propomos a construção de material didático de baixo custo para demonstração do conceito de fases de um corpo iluminado. O principal objetivo de nosso material é facilitar a compreensão das fases da Lua da perspectiva de um observador na Terra. O material ajuda na visualização de dois efeitos importantes: (1º) mesmo tendo sempre a metade da "Lua" (representada por uma bolinha de isopor ou de ping-pong) iluminada pelo "Sol" (representado por uma fonte de luz natural ou artificial), nós vemos diferentes frações de sua superfície iluminada, dependendo do ângulo pelo qual a olhamos; (2º) a orientação da borda convexa da Lua nas fases Crescente e Minguante também depende da perspectiva pela qual a olhamos da Terra. O uso de uma caixa fechada permite observar o contraste entre as diferentes fases sem necessidade de estar em uma sala escurecida. Apresentamos também um texto explicativo sobre fases da Lua, enfatizando a dependência da aparência da parte iluminada com o ângulo de visada.

  2. Autoreporte de exposición a publicidad y promoción de tabaco en una cohorte de fumadores mexicanos: Antes y durante la publicación de la Ley General para el Control del tabaco en 2008

    PubMed Central

    Hernández, Rosaura Pérez; Thrasher, James F.; Bolaños, Rosibel Rodríguez; Gutiérrez, Inti Barrientos; Hernández, Norma A Ibañez

    2015-01-01

    Resumen Objetivo Determinar en población fumadora el nivel de exposición a la mercadotecnia por parte de la Industria Tabacalera (IT), a través de diferentes métodos de promocionar sus productos de tabaco, antes y durante la publicación de la Ley General para el Control del Tabaco (LGCT) en 2008. Material y métodos Estudio de cohorte en fumadores adultos (n=941 pre-LGCT y n=1051 post-LGCT) de cuatro ciudades mexicanas. Se realizaron análisis multivariados mediante modelos de ecuaciones de estimación generalizada (GEE). Resultados Se incremento el autoreporte de recepción de muestras gratis de cigarros (3.7% a 8.1%), ropa o artículos con marcas o logos (3.6% a 6.4%), haber visto información sobre eventos especiales (1.9% a 4.7%), y bares, antros y discos para mayores de edad (21.4% a 28%). Se observaron decrementos de publicidad en exteriores (54.7% a 47.2%). Conclusión Es necesaria una política integral con prohibiciones totales de la publicidad y promoción de los productos de tabaco que integre mayor vigilancia y sanciones para lograr la disminución y prevención del consumo de tabaco. PMID:22689158

  3. Ciencia, Sociedad, Soluciones: Una Introduccion al USGS

    USGS Publications Warehouse

    U.S. Geological Survey

    2001-01-01

    El USGS sirve a la nacion de los Estados Unidos proveyendo informacion fidedigna para ? Describir y comprender la Tierra; ? Minimizar la perdida de vidas y propiedades por desastres naturales; ? Manejar los recursos hidrologicos, biologicos, energeticos y minerales; y ? Mejorar y proteger nuestra calidad de vida.

  4. Basic Concepts of Astronomy: a Methodological Proposal. (Spanish Title: Conceptos Básicos de Astronomía: Una Propuesta Metodológica.) Conceitos Básicos de Astronomia: Uma Proposta Metodológica

    NASA Astrophysics Data System (ADS)

    Darroz, Luiz Marcelo; Heineck, Renato; Samudio Pérez, Carlos Ariel

    2011-12-01

    In this report, the development of a methodological proposal which approaches basic concepts of astronomy-grounded pedagogically on Meaningful Learning is described. The proposal, which consists of four meetings, was developed by teachers and academics of the course of Professor in Physics of the University of Passo Fundo (UPF), through an extension course to a group of highschool students of a public school of the town of Passo Fundo, RS. The work was focused into basic concepts of astronomy. The signs of Meaningful Learning have been obtained by means of research and evaluation tools that were applied at the end of each meeting. The evaluation of the proposal has been conducted by means of a final questionnaire which was answered by the participants at the end ofthe development of activities. By means of the results obtained from the different instruments, and the comments made by the participants during the activities and by means of the high rates of approval obtained in the final questionnaire, we think that the proposal reached the established goals and it may be repeated with the certainty of success. En este relato se describe una propuesta de desarrollo metodológico que aborda conceptos básicos de astronomía fundamentada pedagógicamente en el Aprendizaje Significativo. La propuesta que comprende cuatro encuentros, fue desarrollada por profesores y académicos del curso de Licenciatura en Física de la Universidad de Passo Fundo (UPF), a través de un curso de extensión para un grupo de Liceo del 6º año de una Escuela Pública de la ciudad de Passo Fundo/RS. El trabajo tuvo como eje principal los "conceptos básicos de astronomía". Los indicios de Aprendizaje Significativo fueron obtenidos por instrumentos de pesquisa y evaluación, siempre aplicados después de cada encuentro. La evaluación de la propuesta fue hecha a través de un cuestionario final y contestado por los participantes al finalizar el desarrollo de actividades. Por los resultados obtenidos en diferentes momentos, por los comentarios efectuados por los participantes durante las actividades y por los altos índices de aprobación al final de la etapa, consideramos que la propuesta atingió los objetivos establecidos y puede ser repetida con certeza de éxito. Neste relato, descreve-se o desenvolvimento de uma proposta metodológica que aborda conceitos básicos de astronomia fundamentada pedagogicamente na Aprendizagem Significativa. A proposta, que compreende quatro encontros, foi desenvolvida por professores e acadêmicos do curso de Licenciatura em Física da Universidade de Passo Fundo (UPF), através de um curso de extensão, a um grupo de dez estudantes do ensino médio de uma escola pública da cidade de Passo Fundo, RS. O trabalho centrou-se em conceitos básicos de astronomia. Os indícios da aprendizagem significativa foram obtidos por instrumentos de pesquisa e avaliação aplicados ao término de cada encontro. A avaliação da proposta foi efetuada através de um questionário final respondido pelos participantes ao término do desenvolvimento das atividades. Pelos resultados obtidos nos diferentes instrumentos, pelos comentários efetuados pelos participantes durante as atividades e pelos altos índices de aprovação alcançados no questionário final, consideramos que a proposta atingiu os objetivos estabelecidos e pode ser repetida com convicção de sucesso.

  5. Estudio epidemiológico de sucesos traumáticos, trastorno de estrés post-traumático y otros trastornos psiquiátricos en una muestra representativa de Chile

    PubMed Central

    Pérez Benítez, Carlos I.; Vicente, Benjamin; Zlotnick, Caron; Kohn, Robert; Johnson, Jennifer; Valdivia, Sandra; Rioseco, Pedro

    2010-01-01

    RESUMEN Durante la década de 1990 en los Estados Unidos (EU), el conocimiento sobre el trastorno de estrés post-traumático (TEPT) evolucionó de estudios específicos en un principio, sobre veteranos de guerra y sobre víctimas de desastres, a estudios epidemiológicos más tarde, sin embargo, la epidemiología del TEPT en países en desarrollo ha sido un área poco estudiada hasta ahora. Los expertos en el área de trauma han propuesto que los sucesos traumáticos que ocurren en la niñez son más perjudiciales para la salud mental que aquellos que ocurren más tarde en la vida. Este trabajo revisa los resultados de un estudio epidemiológico llevado a cabo en Chile. Específicamente, se revisan los resultados sobre las tasas de prevalencia del TEPT, traumas asociados más frecuentemente con él, así como la comorbilidad de este trastorno con otros trastornos psiquiátricos a lo largo de la vida. Igualmente se analizaron las diferencias del TEPT en cada sexo, así como la exposición a traumas en una muestra representativa de chilenos. Además se comparó la prevalencia de trastornos psiquiátricos en personas que sufrieron su primer trauma durante la niñez, durante la edad adulta, o que no reportaron traumas durante su vida. En estos estudios epidemiológicos se usaron módulos del TEPT y trastorno de personalidad antisocial (TPA) de la entrevista diagnóstica siguiendo los criterios del DSM-III-R (DIS–III-R). Para evaluar el resto de los trastornos psiquiátricos se usó la Entrevista Diagnóstica Internacional Compuesta (CIDI). Estos instrumentos fueron administrados en tres ciudades chilenas a 2390 personas mayores de 15 años. Para estimar los errores estándares (EE) debido al diseño de la muestra y a la necesidad de ajuste se usó el método Taylor de linearización seriada. También se usó un análisis de regresión logística para examinar la relación entre el TEPT, los factores demográficos de riesgo y el tipo de trauma. Además se utilizó la regresión logística multivariada para evaluar si la relación entre el TEPT y el sexo pudiera ser explicada por medio de otros factores de riesgo, así como para calcular las tasas y la oportunidad relativa (razón de productos cruzados) de trastornos psiquiátricos a lo largo de la vida. El primer análisis arrojó que la prevalencia de TEPT a lo largo de la vida fue de 4.4% (2.5% para hombres y 6.2% para mujeres). De los hechos traumáticos reportados, la violación sexual tuvo una correlación más alta con el TEPT que los demás hechos traumáticos. Las mujeres tuvieron más probabilidades de experimentar TEPT que los hombres, después de controlar la variable asalto violento. El segundo análisis evidenció que los que habían sufrido traumas a lo largo de la vida tuvieron mayor probabilidad de tener un trastorno psiquiátrico en comparación con aquellos que no reportaron traumas. También se encontró que los que sufrieron su primer trauma durante la infancia tuvieron más probabilidad de desarrollar trastornos de pánico a lo largo de la vida que aquellos que sufrieron su primer trauma en la edad adulta, independientemente del número de traumas que sufrieron y de las diferencias demográficas. Aunque Chile tiene un contexto histórico-cultural y una economía diferente a otros países en los que se ha estudiado anteriormente la epidemiología del TEPT, el presente estudio reflejó tendencias similares a las reportadas en estudios previos. Los hallazgos expuestos enfatizan la importancia de investigar la prevalencia del TEPT, los patrones de comorbilidad del TEPT y las diferencias de sexo en la prevalencia del TEPT en diferentes países. También estos resultados sugieren que los sucesos traumáticos en la infancia (y no en la adultez) pueden estar relacionados con la ocurrencia de trastornos psiquiátricos específicos. PMID:21113425

  6. A Proposed Activity for a Meaningful Learning about the Moon Phases. (Breton Title: Uma Proposta de Atividade Para a Aprendizagem Significativa sobre as Fases da Lua.) Una Actividad Propuesta Para EL Aprendizaje Significativo Acerca de Las Fases de la Luna

    NASA Astrophysics Data System (ADS)

    Martins, Bruno Andrade; Langhi, Rodolfo

    2012-12-01

    This paper presents one of the concepts of Astronomy and its consequent failure in teaching this topic in high school, even when the official documents point out the necessity of Astronomy teaching at this school level. Among the spontaneous conceptions in Astronomy that high school students carry with them, even after the end of the school, we emphasized in this research the Moon phases. The development of different strategies in relation to traditional methods, aimed to teaching-learning process on this topic was considered in this study. These strategies were devised based on the reference frame of the Meaningful Learning, as elaborated by Ausubel. The proposals presented here include the active participation of students in experimental activities and other didactic activities, for their continuous evaluation during the process. These activities finished with a Comics elaboration about the Moon phases. Therefore, the objective of this paper is to present a proposal for differentiated teaching activity about Moon phases supported by the theoretical principles of Meaningful Learning at Physics classes. Este texto foca um dos conteúdos de Astronomia e a consequente falha no ensino deste tema no ensino médio, apesar de os documentos oficiais apresentarem a necessidade de se trabalhar a Astronomia neste nível de ensino. Dentre as concepções alternativas em Astronomia que os alunos do ensino médio carregam consigo, mesmo após o término dos estudos, destacamos, nesta pesquisa, o fenômeno das fases da Lua. O desenvolvimento de estratégias diferenciadas em relação ao ensino tradicional, visando o processo de ensino-aprendizagem sobre este tema, foi contemplado neste trabalho como um dos resultados obtidos sob a luz dos referenciais da aprendizagem significativa, fundamentados em Ausubel. Segundo a proposta aqui apresentada, a participação ativa dos alunos na execução de uma atividade experimental e outras atividades didáticas, que visam sua contínua avaliação durante o processo, culmina com a elaboração de uma história em quadrinhos envolvendo as fases da Lua. Portanto, o objetivo deste trabalho é apresentar uma proposta de atividade didática diferenciada sustentada pelos princípios teóricos da aprendizagem significativa aplicada ao ensino das fases da Lua durante as aulas de Física no ensino médio. En este trabajo se presenta uno de los contenidos de la Astronomía y el evidente fracaso en la enseñanza del tema en la escuela secundaria, a pesar del hecho que los documentos oficiales apuntan para la necesidad de trabajar contenidos de Astronomía en este nivel. Entre los conceptos alternativos en Astronomía que los alumnos secundarios llevan consigo, aún después de terminados los estudios, destacamos aquí el fenómeno de las fases de la Luna. El desarrollo de diferentes estrategias en relación con los métodos tradicionales, dirigidas al proceso de enseñanza-aprendizaje en este tema fue considerado en este trabajo como uno de los resultados obtenidos a la luz de los referenciales del aprendizaje significativo, tal como fueron fundamentados por Ausubel. Según la propuesta que aquí se presenta, la participación activa de los estudiantes en la ejecución de una actividad experimental y otras actividades educativas destinadas a la evaluación continua durante el proceso culminó en la elaboración de una historieta respecto de las fases de la Luna. Por lo tanto, el objetivo de este trabajo es presentar una propuesta de actividad de enseñanza diferenciada con el apoyo de los principios teóricos del aprendizaje significativo aplicado a la enseñanza de las fases de la luna durante las clases de física del ciclo secundario.

  7. 50 CFR 17.12 - Endangered and threatened plants.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... aquatilis Water howellia U.S.A. (CA, ID, MT, OR, WA) Campanulaceae T 542 NA NA Hudsonia montana Mountain..., Hispaniola Juglandaceae E 603 NA NA Justicia cooleyi Cooley's water-willow U.S.A. (FL) Acanthaceae E 356 NA... Lilaeopsis schaffneriana var. recurva Huachuca water-umbel U.S.A. (AZ), Mexico Apiaceae E 600 17.96(a)...

  8. Suvali Una? (And What Is This One Doing?).

    ERIC Educational Resources Information Center

    MacLean, Edna Ahgeak

    This bilingual reader in the Barrow Inupiaq language and in English is intended for beginning readers on the elementary school level. Pen-and-ink drawings illustrate the text and a free English translation is appended. (NCR)

  9. Esercitazioni Matematiche: Una Rivista Ad uso Degli Studenti Universitari.

    ERIC Educational Resources Information Center

    Micale, Biagio

    1992-01-01

    The history of the journal "Esercitazioni Matematiche" (1921-43) edited by the "Circolo Matematico di Catania" for university students is described. A selection of proposed problems with some of their solutions is reported. (Author)

  10. C/1999 S4 (LINEAR): la morte di una cometa

    NASA Astrophysics Data System (ADS)

    Foglia, Sergio; Ligustri, Rolando; Milani, Giannantonio

    2002-01-01

    The comet C/1999 S4 was expected to be a moderately bright object during summer 2000. It was observed by visual, photographic and CCD techniques. The derived light curve shows that the comet reached a brightness maximum (mag. 6 around July 26) corresponding to the total dissolution of its nucleus. From the analysis of the light curve a double maximum was detected, the dissolution event appearing to start around July 20. Several morphological changes were also observed during the apparition in relation to partial fragmentation events. The comet aspect completely changed during the final disruption. Relevant changes in the plasma tail were observed and they are probably related both to the activity of the nucleus and to the solar wind. A perspective anti-tail was detected in early July.

  11. Una Perspectiva de Mexico: Its People, Places and History.

    ERIC Educational Resources Information Center

    Bianchi, Gary; Bianchi, Maria Eugenia Matute

    Evolving from a general commitment to the goals of cultural pluralism and bicultural education, this portfolio of 24 full color and halftone photographs aims to reinforce those curricular objectives which emphasize a respect for the value and individuality of different cultures and groups, affirm the right of an individual to maintain a bicultural…

  12. La Ciencia de los Antiguos Mexicanos: Una Bibliografia Selecta

    ERIC Educational Resources Information Center

    Ortiz-Franco, Luis; Magana, Maria

    1973-01-01

    Fifty-five citations pertaining to the scientific and mathematic development of ancient Mexicans, particularly the Mayas, are given in this select bibliography. The introduction and descriptions of resource libraries in 8 States are in Spanish. (NQ)

  13. 50 CFR 17.12 - Endangered and threatened plants.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... aquatilis Water howellia U.S.A. (CA, ID, MT, OR, WA) Campanulaceae T 542 NA NA Hudsonia montana Mountain..., Hispaniola Juglandaceae E 603 NA NA Justicia cooleyi Cooley's water-willow U.S.A. (FL) Acanthaceae E 356 NA... water-umbel U.S.A. (AZ), Mexico Apiaceae E 600 17.96(a) NA Lilium occidentale Western lily U.S.A....

  14. The Understanding of Astronomy Concepts by Students from Basic Education of a Public School. (Spanish Title: El Entendimiento de Conceptos de Aastronmía Por Los Alumnos de Educación Básica en Una Escuela Pública.) O Entendimento de Conceitos de Astronomia Por Alunos da Educação Básica: O Caso de Uma Escola Pública Brasileira

    NASA Astrophysics Data System (ADS)

    Iria Machado, Daniel; dos Santos, Carlos

    2011-07-01

    We present the results obtained in a research on the comprehension of basic astronomical concepts, in which 561 students from fifth grade middle school to third grade high school of a public school of the city of Foz do Iguaçu (Brazil) took part. A test with 20 multiple-choice questions was applied to indentify the most common conceptions expressed by the students. This test was elaborated based on the literature about misconceptions and covered the following topics: the day-night cycle; the time zones; the seasons of the year; the phases of the Moon; the movement of the Moon; the apparent movement of the Sun in the celestial sphere; the eclipses; the dimensions and distances in the Universe; the brightness of the stars and its observation from Earth. Though a small progress was verified in the proportion of scientifically acceptable answers when comparing the eighth grade of middle school to the fifth, and the third grade of high school to the first, there was an overall predominance of alternative conceptions regarding most of the explored subjects, which persisted up to the last year of secondary school. The comparison to data found in this research made in other socio-cultural contexts revealed, in many aspects, similar notions and difficulties revealed by the students. Se presentan los resultados de una investigación sobre la comprensión de conceptos astronómicos básicos, en la cual participaron 561 estudiantes que cursaban entre el quinto grado de la enseñanza primaria y el tercer año de la enseñanza secundaria de una escuela pública de la ciudad de Foz do Iguaçu (Brasil). Se utilizó un test de 20 preguntas de opción múltiple para identificar las concepciones más comunes expresadas por los estudiantes. Este instrumento de recolección de datos se desarrolló en base a la literatura sobre las concepciones alternativas y trató los siguientes temas: el ciclo día-noche, los husos horarios, las estaciones del año, las fases de la Luna, el movimiento de la Luna, el movimiento aparente del Sol sobre la esfera celeste, los eclipses, las dimensiones y las distancias en el Universo, el brillo de las estrellas y su observación de la Tierra. Si bien ha habido un pequeño progreso en la proporción de respuestas aceptables científicamente cuando se cotejó el octavo grado de la enseñanza primaria con el quinto, y el último año de la enseñanza secundaria con el primero, se observó un predominio de las concepciones alternativas en relación a la mayoría de los temas explorados, que continuó hasta los últimos años de la educación básica. Una comparación con los datos encontrados en investigaciones realizadas en otros contextos socioculturales revelaron, en muchos aspectos, conceptos y dificultades similares expresadas por los estudiantes. Apresentam-se os resultados de uma investigação sobre a compreensão de conceitos astronômicos básicos, da qual participaram 561 estudantes da quinta série do Ensino Fundamental ao terceiro ano do Ensino Médio de uma escola pública da cidade de Foz do Iguaçu. Um teste com 20 questões de múltipla escolha foi aplicado para identificar as concepções mais comuns expressadas pelos alunos. Esse instrumento de coleta de dados foi elaborado com base na literatura sobre concepções alternativas e abordou os seguintes temas: o ciclo dia-noite; os fusos horários; as estações do ano; as fases da Lua; o movimento da Lua; o movimento aparente do Sol na esfera celeste; os eclipses; as dimensões e distâncias no Universo; o brilho das estrelas e sua observação da Terra. Embora se tenha verificado um pequeno progresso na proporção de respostas cientificamente aceitáveis ao se cotejar a oitava série do Ensino Fundamental com a quinta, e a terceira série do Ensino Médio com a primeira, houve o predomínio de concepções alternativas em relação à maior parte dos temas explorados, as quais persistiram até o último ano da Educação Básica. A comparação com dados encontrados em investigações realizadas em outros contextos socioculturais revelaram, em muitos aspectos, noções e dificuldades similares manifestadas pelos estudantes.

  15. The Universe in a Box: Introduction to the Study of Astronomy in the Initial Formation of Physics Teachers. (Spanish Title: El Universo Representado en Una Caja: Introducción al Estudio de la Astronomía en la Formación Inicial de Profesores de Física.) O Universo Representado em Uma Caixa: Introdução ao Estudo da Astronomia NA Formação Inicial de Professores de Física

    NASA Astrophysics Data System (ADS)

    Longhini, Marcos Daniel

    2009-07-01

    This is a report of an activity of introduction to the study of Astronomy developed with a group of future Physics teachers at a Brazilian public university. Such activity had the goal of giving privileged emphasis to notions of spatiality, alternative conceptions of the participants and the process of interaction among peers, and consisted of the representation, in a three dimensional space, of the models of the universe that the participants had. The results, which were categorized as miscellaneous, geocentric, heliocentric and acentric models of the universe, were qualitatively analyzed. Analyses of the activity in the perspective of the participants are indicated and additional considerations are made regarding its use as a resource for teaching Astronomy and for teacher training. Este es el informe de una actividad para presentar un estudio introductorio de la Astronomía, desarrollado con una clase de futuros profesores de física en una universidad pública brasileña. Esta actividad tuvo como objetivo centrar las nociones de espacialidad, las concepciones alternativas de los participantes y el proceso de interacción entre pares, y consistió en la representación en un espacio tridimensional, de los modelos del universo que los participantes habían. Los resultados, que se clasificaron en universo miscelania, geocéntrico, heliocéntrico y acentrico, se analizaron cualitativamente. Son identificadas análisis de la actividad por los participantes, e hizo observaciones sobre su uso como recurso para la enseñanza de la astronomía y la formación de docentes. Trata-se do relato de uma atividade de introdução ao estudo da Astronomia, desenvolvida com uma turma de futuros professores de Física, em uma universidade pública brasileira. Tal atividade teve como meta privilegiar noções de espacialidade, as concepções alternativas dos participantes e o processo de interação entre pares e constou da representação, em um espaço tridimensional, dos modelos de universo que os participantes possuíam. Os resultados, que foram categorizados em universo miscelânea, geocêntrico, heliocêntrico e acêntrico, foram analisados qualitativamente. São apontadas as análises da atividade na ótica dos participantes, além de tecidas considerações sobre seu emprego como recurso ao ensino de Astronomia e na formação docente.

  16. A Diagnostic Assessment for the Teaching of Astronomy. (Spanish Title: Una Evaluación Diagnóstica Para la Enseñanza de la Astronomia.) Uma Avaliação Diagnóstica Para o Ensino da Astronomia

    NASA Astrophysics Data System (ADS)

    Pacifico Ribeiro de Assis Silveira, Felipa; Soares Gomes de Sousa, Célia Maria; Moreira, Antonio

    2011-07-01

    This article aims to present the results of a diagnostic evaluation, used as a tool for collecting data on prior knowledge of scientific concepts needed to understand the topic "Earth and Universe", from a group comprised of 47 students of 6th grade. The educational method of diagnosing the student's prior knowledge before teaching them is founded on the Meaningful Learning theory, proposed by David Ausubel. The diagnostic evaluation consisted of 25 questions; the answers were analyzed and categorized, making possible their interpretation, which allows us to understand the meanings assigned by the student to these concepts. It follows from the diagnostic evaluation, that the majority of students surveyed had difficulties in exposing scientific concepts on the topic "Earth and Universe" when starting the 6th grade. However, we identified relevant ideas and representations that contributed to the re-signification of scientific concepts proposed for the teaching of the subject in this grade. The results of diagnostic evaluation served as reference to the organization of the syllabus, making possible the learning process by matching the sequence of teaching to the students" characteristics and context of the classroom. It is expected that other researchers in this topic can also use the instrument presented in this paper. Este artículo tiene como objetivo presentar los resultados de una evaluación diagnóstica, utilizada como una herramienta para recoger datos sobre el conocimiento previo de los conceptos científicos necesarios para comprender el tema "Tierra y Universo", de un grupo compuesto por 47 alumnos de 6º grado de la escuela primaria. La acción pedagógica del diagnóstico de los conocimientos previos del estudiante antes de enseñarles está justificada por la teoría del Aprendizaje Significativo, propuesta por David Ausubel. La evaluación de diagnóstico consistió en 25 preguntas, las respuestas fueron analizadas y clasificadas objetivando-se su interpretación, lo que nos permite comprender los significados asignados por el estudiante a estos conceptos. Se desprende de la evaluación diagnóstica que la mayoría de los encuestados ha tenido dificultades para exponer los conceptos científicos sobre el Universo y la Tierra, para iniciar el 6 º grado. Sin embargo, se identificaron ideas relevantes y las representaciones que contribuyeron a la re-significación de los conceptos científicos propuestos para la enseñanza del tema en esta serie. Los resultados de la evaluación diagnóstica han servido como referencia para la organización del Programa, facilitando el proceso de aprendizaje, haciendo coincidir la secuencia didáctica a las características de los estudiantes y el contexto del aula. Se espera que el instrumento presentado en este documento también pueda ser utilizado por otros investigadores en investigaciones relacionadas con el tema. Este artigo tem como objetivo apresentar os resultados de uma avaliação diagnóstica, utilizada como instrumento para a coleta de dados sobre o conhecimento prévio de conceitos científicos, necessários à compreensão do tema Terra e Universo, de um grupo composto por 47 estudantes, da 6ª série do Ensino Fundamental. A ação pedagógica de diagnosticar os conhecimentos prévios, do estudante, antes de ensiná-los, tem fundamento na teoria da Aprendizagem Significativa, proposta por David Ausubel. Essa avaliação diagnóstica foi composta por 25 questões, cujas respostas foram analisadas e categorizadas visando sua interpretação, o que permitiu compreender os significados atribuídos pelo estudante a esses conceitos. Conclui-se, a partir da avaliação diagnóstica, que a maioria dos estudantes pesquisados apresentou dificuldades em expor conceitos científicos sobre o tema Terra e Universo ao iniciar a 6ª série. Entretanto, foram identificadas ideias e representações relevantes que contribuíram para a (re)significação dos conceitos científicos propostos para o ensino do tema nessa série. Os resultados da avaliação diagnóstica serviram como referência para a organização do plano de ensino, viabilizando o processo de aprendizagem, por adequar a sequência didática às características dos estudantes e ao contexto da sala de aula. É esperado que o instrumento apresentado nesse artigo possa ser utilizado também por outros pesquisadores em investigações relacionadas ao tema.

  17. Learning about the Sky from the Environment: An Experience Working Along One Year with Students of Elementary Education. (Spanish Title: Aprendiendo sobre EL Cielo Desde el Entorno: Una Experiencia Trabajando Durante un Año Junto a Estudiantes del Primario.) Aprendendo sobre o Céu a Partir do Entorno: Uma Experiência de Trabalho ao Longo de um Ano com Alunos de Ensino Fundamental

    NASA Astrophysics Data System (ADS)

    Longhini, Marcos Daniel; Gomide, Hanny Angeles

    2014-12-01

    Research developed with 95 students of the 6th year of elementary education in a public school of Uberlândia, Minas Gerais. It was a continuous work from February to December 2013, which led the students to participate in activities of observation of the environment, specifically the sky, analyzing the changes occurred. We focused on the study of variations in temperature, rainfall, day length, variations in the size of the shadows and changes in the aspect of the Moon. Our focus of analysis targeted the discussion of the knowledge that these students had about the topics indicated and as they entered the stage during the implementation of the proposal. The results showed a limited perception that students have of their environment, however, lately expanded due to the undertaken activities, especially in relation to the Moon. Working with systematic measure procedures reveals the careful handling of data so that they become understandable to students, and working with the shadows points towards the students first understand how shadows are formed, and then apply this knowledge to Astronomy. Finally, we conclude that the lived process consisted of an initial step of a work that should be encouraged for the subsequent years of training of these students. Proyecto de investigación desarrollado con 95 alumnos del sexto año de primaria en una escuela pública de Uberlândia, Minas Gerais. Fue un trabajo continuo, de febrero a diciembre de 2013, que llevó a los estudiantes a participar en actividades de observación de su entorno, entre ellas, el cielo, analizando los cambios ocurridos. Nos centramos en el estudio de las variaciones en la temperatura, las precipitaciones, la duración del día, las variaciones en el tamaño de las sombras y los cambios en los aspectos de la Luna. Nuestro foco de análisis se centró en discutir el conocimiento que estos estudiantes tenían sobre los temas indicados al inicio y término de la propuesta. Los resultados mostraron una percepción limitada que los estudiantes tienen de su alrededor la cual, sin embargo, se expandió debido a las actividades llevadas a cabo, sobre todo en relación con la Luna. Trabajar con medidas sistemáticas revela el manejo cuidadoso de los datos para que sean comprensibles para los estudiantes, así como el trabajo con las sombras para que comprendan primero como se forman estas para después trabajarlas en Astronomía. Por último, llegamos a la conclusión de que el proceso desarrollado consistió en una etapa inicial de una obra que debe ser profundizado en los años posteriores de la formación de estos estudiantes. Projeto de pesquisa desenvolvido com 95 alunos do 6º ano do Ensino Fundamental de uma escola pública estadual de Uberlândia, Minas Gerais. Foi um trabalho contínuo, de fevereiro a dezembro de 2013, o qual levou os alunos a participarem de atividades de observação do entorno, dentre ele, o céu, analisando as mudanças ocorridas. Focamos no estudo das variações de temperaturas, chuvas, duração do dia, variações do tamanho das sombras e mudanças nos aspectos da Lua. Nosso foco de análise centrou-se em discutir os conhecimentos que os referidos alunos tinham acerca dos temas indicados no início e ao término da implementação da proposta. Os resultados mostraram a percepção limitada que os estudantes possuem de seu entorno, todavia, ampliada em função das atividades desenvolvidas, principalmente no que se refere à Lua. O trabalho com medidas sistemáticas revela o cuidado no tratamento dos dados para que eles se tornem compreensíveis aos alunos, assim como o trabalho com as sombras sinaliza para que os alunos primeiramente compreendam como as sombras são formadas para depois trabalhar isso em Astronomia. Por fim, concluímos que o processo vivido constituiu-se em uma etapa inicial de um trabalho que deve ser estimulado para os anos subsequentes da formação desses alunos.

  18. Asystasia mosaic Madagascar virus: a novel bipartite begomovirus infecting the weed Asystasia gangetica in Madagascar.

    PubMed

    De Bruyn, Alexandre; Harimalala, Mireille; Hoareau, Murielle; Ranomenjanahary, Sahondramalala; Reynaud, Bernard; Lefeuvre, Pierre; Lett, Jean-Michel

    2015-06-01

    Here, we describe for the first time the complete genome sequence of a new bipartite begomovirus in Madagascar isolated from the weed Asystasia gangetica (Acanthaceae), for which we propose the tentative name asystasia mosaic Madagascar virus (AMMGV). DNA-A and -B nucleotide sequences of AMMGV were only distantly related to known begomovirus sequence and shared highest nucleotide sequence identity of 72.9 % (DNA-A) and 66.9 % (DNA-B) with a recently described bipartite begomovirus infecting Asystasia sp. in West Africa. Phylogenetic analysis demonstrated that this novel virus from Madagascar belongs to a new lineage of Old World bipartite begomoviruses. PMID:25900620

  19. The Combine Project: An Experience in a Dual-Language Classroom = El proyecto de la cosechadora: una experiencia en una clase bilingue.

    ERIC Educational Resources Information Center

    Wilson, Rebecca

    This article, also available in Spanish, describes what happened when a bilingual kindergarten class in West Liberty, Iowa, investigated a combine. The dual-language Kindergarten program supports content area instruction in both Spanish and English. The first part of the article tells the story of the Combine Project, this class's first project…

  20. Effect of Hygrophila spinosa in ethylene glycol induced nephrolithiasis in rats

    PubMed Central

    Ingale, Kundan G.; Thakurdesai, Prasad A.; Vyawahare, Neeraj S.

    2012-01-01

    Objective: Hygrophila spinosa (Acanthaceae) is traditionally used to treat urinary calculi. The present study aimed to evaluate the antiurolithiatic activity of methanolic extract of Hygrophila spinosa (Acanthaceae) in ethylene glycol induced nephrolithiasic rats. Materials and Methods: Methanolic extract of Hygrophila spinosa (HSME) (250 and 500 mg/ kg body weight) was administered orally to male Wistar albino rats. Ethylene glycol (EG) was used to induce nephrolithiasis. The parameters studied included water intake, urinary volume, urinary pH, urinary and kidney oxalate and calcium, urinary magnesium and serum uric acid. Results: Ethylene glycol feeding resulted in hyperoxaluria as well as increased renal excretion of calcium and serum uric acid along with decreased excretion of urinary magnesium. Treatment with HSME significantly reduced the elevated urinary oxalate, urinary calcium and serum uric acid with increase in reduced urinary magnesium. Ethylene glycol feeding also resulted in increased levels of calcium and oxalate in kidney which was decreased after the treatment with HSME. The increased deposition of stone forming constituents in the kidneys of ethylene glycol treated rats was significantly lowered by treatment with HSME. Conclusion: The results indicate that the aerial parts of Hygrophila spinosa are endowed with antiurolithiatic activity, thereby justifying its traditional claim. PMID:23112429

  1. Screening of plants acting against Heterometrus laoticus scorpion venom activity on fibroblast cell lysis.

    PubMed

    Uawonggul, Nunthawun; Chaveerach, Arunrat; Thammasirirak, Sompong; Arkaravichien, Tarinee; Chuachan, Chattong; Daduang, Sakda

    2006-01-16

    The aqueous extracts of 64 plant species, listed as animal- or insect-bite antidotes in old Thai drug recipes were screened for their activity against fibroblast cell lysis after Heterometrus laoticus scorpion venom treatment. The venom was preincubated with plant extract for 30 min and furthered treated to confluent fibroblast cells for 30 min. More than 40% efficiency (test/control) was obtained from cell treatment with venom preincubated with extracts of Andrographis paniculata Nees (Acanthaceae), Barringtonia acutangula (L.) Gaertn. (Lecythidaceae), Calamus sp. (Palmae), Clinacanthus nutans Lindau (Acanthaceae), Euphorbia neriifolia L. (Euphorbiaceae), Ipomoea aquatica Forssk (Convolvulaceae), Mesua ferrea L. (Guttiferae), Passiflora laurifolia L. (Passifloraceae), Plectranthus amboinicus (Lour.) Spreng. (Labiatae), Ricinus communis L. (Euphorbiaceae), Rumex sp. (Polygonaceae) and Sapindus rarak DC. (Sapindaceae), indicating that they had a tendency to be scorpion venom antidotes. However, only Andrographis paniculata and Barringtonia acutangula extracts provided around 50% viable cells from extract treatments without venom preincubation. These two plant extracts are expected to be scorpion venom antidotes with low cytotoxicity. PMID:16169172

  2. I Didn't Say a Word/No Dije una Palabra.

    ERIC Educational Resources Information Center

    Bielawski, Joseph G.; Pickens, Marjorie

    This bilingual English/Spanish book of captioned photographs and its related teaching manual were created as a joyful experience in nonverbal communication for children and adults. It is intended to sharpen awareness of nonverbal messages expressed by children in their everyday environment. To help develop self-understanding and to encourage oral…

  3. Luchando por una educacion: A Qualitative Understanding of Undocumented Latina/o College Student Motivation

    ERIC Educational Resources Information Center

    Navarro, Elvia Lorena

    2013-01-01

    The current qualitative study explored the factors and resources that motivate undocumented Latino/a college students to persist in higher education. Through the data obtained from the four qualitative open-ended survey questions, a content analysis revealed specific codes, themes, and subthemes addressing the factors and resources that motivate…

  4. The Puerto Ricans--Two Communities, One Culture. (Los Puertorriquenos--Dos Comunidades, Una Cultura.)

    ERIC Educational Resources Information Center

    Vivo, Paquita

    1980-01-01

    Puerto Rican roots stem from the ethnic mixture of Indians, Europeans, and Africans. This article describes the advent of each of the groups on the island, the historical and cultural impact each made, and the retention of heritage among Puerto Rican migrants to the U.S. (DS)

  5. Cuentos Faciles. Habia una vez.... (Simple Stories. There was a Time....) (Presenting Simple Stories in Spanish.)

    ERIC Educational Resources Information Center

    Arroyo, Nancy; And Others

    For Spanish-speaking children, simple stories in Spanish, told in a natural language suitable for their age, are not only entertaining, but a means of developing vocabulary and concepts. Non-Spanish-speaking children, too, need exposure to more language than they can understand word for word. However, the simple stories for the Spanish speaker…

  6. Historia de vidas de profesoras de ciencias: Hacia una ensenanza cientifica de calidad

    NASA Astrophysics Data System (ADS)

    Vega Osorio, Melba

    The purpose of this research was to capture the memories, practices, thoughts and philosophies of education that four experienced Science teachers have accumulated through the years. The life story qualitative research design was used in order to collect more meaningful information from the participants amenable to in depth analysis and interpretation. The life stories interviews were conducted using an interview protocol especially designed for the study. The interviews were recorded and transcribed. The questions that guided this research are: 1. What are the meanings that science teachers give to their educational practices? 2. How did the life experiences of the participants contribute to their success as science teachers? 3. How did the participants' educational practices change and evolve over time? 4. What does teaching science mean in the life of the participants? 5. Which reflections arise from the work of the participants that impact the teaching of science? 6. What are the participants' conceptions about teachers' professional development? 7. What are the participants' contributions to the field of scientific education? Wolcott's (1994) DAI analytical model was used for the analysis of the information and the narratives were written following the three dimensions of the model: description, analysis and interpretation. According to the life stories of the participants, being a teacher requires more than teaching the content. To be a successful and an exemplary science teacher, they have to live the teaching vocation, with dedication, passion, commitment and love for teaching, for students and science; teachers have to give their best for the students, even if it means making personal sacrifices; they should keep updated in knowledge (content) and in educational innovations (strategies); emphasizing both the theoretical and the practical aspects in the field of science, and being an inspirational guide for students.

  7. Perspectiva sobre una Personalidad Senera: Carmen Fischer Ramirez (Perspective on a Singular Personality: Carmen Fischer Ramirez).

    ERIC Educational Resources Information Center

    Quezeda, Dina Alarcon

    1992-01-01

    Traces the career of Carmen Fischer Ramirez, focusing on her work in improving early childhood education in Chile. Reviews her university career, work with the World Organization for Early Childhood Education, and major publications. (AC)

  8. "...Una Etapa Siempre Dificil": Concepts of Adolescence and Programs of Secondary Education in Mexico.

    ERIC Educational Resources Information Center

    Levinson, Bradley A.

    An American visiting a Mexican secundaria (equivalent to the U.S. junior high school) noted the strong presence of discourses on "adolescence." This prompted an ideological and historical review of the secundaria since its development in the postrevolutionary ethos of the 1920s-30s. Inspired by a U.S. model of adolescent education in the liberal…

  9. Mediacion en educacion especial: Una guia para los padres (Special Education Mediation: A Guide for Parents).

    ERIC Educational Resources Information Center

    Consortium for Appropriate Dispute Resolution in Special Education (CADRE), Eugene, OR.

    Designed for Spanish-speaking parents of students with disabilities living in Oregon, this brochure describes the general mediation process that parents can use to resolve special education services disputes with schools. It begins by discussing what mediation is and the characteristics of a trained mediator. It addresses the requirement for…

  10. The Struggle for Mexico's First Gay-Straight Alliance: Como una Novela Real

    ERIC Educational Resources Information Center

    Macgillivray, Ian K.

    2006-01-01

    In 2004, a group of high school students at a private American school in Mexico City started the first gay-straight alliance in Mexico. A small group of conservative parents and a Mormon principal organized in opposition. This paper details the students' struggle to keep their club and offers lessons learned about student activism, school change,…

  11. GSC 3087 2079. Invito all'osservazione di una (quasi sospetta) variabile

    NASA Astrophysics Data System (ADS)

    Papini, Riccardo; Donati, Silvia; Marchini, Alessandro

    2005-12-01

    On June, 2002, Marvin Baldwin, chairman of the American Association of Variable Star Observers (AAVSO) RR Lyrae Committee, suggested to observe few variable stars recently discovered during the ROTSE project all-sky survey. The selected star was GSC 3087 2079 whose variability was confirmed using the data gathered by the authors during the 2002 summer. In this article we assign the variable to the RR Lyr c class, and invite the interested observers to collect further data.

  12. Una experiencia europea de innovacion pedagogica basada en la escritura de un ibro.

    ERIC Educational Resources Information Center

    Montane, Mireia; Roc, Merce

    2002-01-01

    Describes a European project based on writing a book from an educational perspective. Participants included 18 schools from 13 countries. The study originated in a Spanish Comenius 3.1 project, which determined that university teams would visit "book writing" schools, supporting teachers and analyzing and publishing their experiences. After

  13. Areas Nacionales de Estudio Ambiental: Una Guia. (National Environmental Study Area: A Guide).

    ERIC Educational Resources Information Center

    National Park Service (Dept. of Interior), Washington, DC.

    This booklet, the Spanish version of SE 014 817, is a guide for teachers and resource managers who are interested in establishing National Environmental Study Areas (NESA) or interested in receiving NESA recognition for their on-going environmental study area programs. It outlines the characteristics and procedures of the program; the nature,…

  14. Historia Verdadera de Una Gota de Miel. (The True Story of a Drop of Honey).

    ERIC Educational Resources Information Center

    Galarza, Ernesto

    Part of the series "Coleccion Mini-Libros" (Mini-Book Collection), the booklet is a factual account of the life of a bee. Designed to provide a tool for education of the Spanish-speaking child, as well as to stimulate an interest in Spanish among the youth of our country, the publication is a compilation of photographs with a description of bees…

  15. Una nina adoptada su conducta en el jardin de infantes (An Adopted Girl's Conduct in Preschool).

    ERIC Educational Resources Information Center

    Truscello de Mason, Marile

    1994-01-01

    Reports observations made by a preschool teacher in Argentina about a four-year-old adopted girl in her preschool. The teacher noticed problems between the girl and her adoptive mother, who tried to prevent the girl from remembering her past. The teacher particularly noticed changes in the girl's drawings. (AA)

  16. Una guia a los padres acerca del sistema educacional = A Parent's Guide to Education. Spanish Edition.

    ERIC Educational Resources Information Center

    Rowch, Nancy

    A guide for Spanish-speaking parents of elementary and secondary school students in Nebraska provides in Spanish, and then in English, information concerning education in the state. Topics covered include: state policy concerning enrolling children in school, medical requirements for enrollment and attendance, the school curriculum requirements…

  17. Evolución de una protuberancia observada por el HASTA

    NASA Astrophysics Data System (ADS)

    Luoni, M. L.; Francile, C.

    Prominence eruptions are one of the most spectacular manifestations of solar activity; in addition to flares and coronal mass ejections. Both filaments and prominences are chromospheric material suspended in the corona by the magnetic field. Hence their importance as tracers of field ejections. Some parts of their magnetic structure are not well understood; especially with regard to the loss of stability. On 06 December 2010 the H-Alpha Telescope for Argentina (HASTA) observed a prominence in the eastern solar limb including when part of it was ejected. In this paper the evolution of the filament is analyzed; its structure before and after the eruption; determining parameters that characterize it from HASTA data. FULL TEXT IN SPANISH

  18. Una nueva galaxia IR con nucleo compuesto: Seyfert 1.5 y estallido de formacion estelar

    NASA Astrophysics Data System (ADS)

    Lipari, S. L.; Merlo, D. C.; Moyano, M. M.

    Optical aperture spectroscopy and CCD broad- and narrow-band images are presented for the barred Seyfert 1 galaxy: IRAS 22117-3903. IRAS data are also used to analyse this object. The CTIO broad band CCD imaging show interesting morphological features: a compact nucleus with a prominent bar; two bright spiral arms; and a partial/segmented inner ring. The narrow-band imaging show that the nuclear H+[NII] emission is concentrate mainly in the nucleus. We find optical spectral features characteristic of a Seyfert 1.5 nucleus; i.e.; showing hydrogen emission lines with broad and narrow components. We detected high excitation emission lines ([CaV]+[FeXIV]; [FeVII]). We study the stellar population in the nuclear region. We find that the stellar population that represent quite well the nuclear stellar population is an average of spiral galaxies dominated by the old population plus a contribution of young stars. Physical conditions are derived for the narrow emission line region; and we detected very high electron temperature (T=4400045000 K); untypical for the ordinary AGNs and probably associated to shocks in a starburst component. Finally; at the optical and IR wavelength; we find properties typical of an nucleus with compound nature; in good agreement with the AGN/QSOs evolutionary model of Lípari ; Terlevich (2006; ; 368; 1001). FULL TEXT IN SPANISH

  19. Una Experiencia Pedagogica en el Jardin Infantil "La Cabana" (A Teaching Experience in "La Cabana" Kindergarten).

    ERIC Educational Resources Information Center

    de la Vega, B.

    1992-01-01

    Reviews the history of La Cabana kindergarten, which provides preschool education and meals for 100 children and sewing classes for mothers in a working class neighborhood in Bogota, Colombia. Describes the implementation of a new curriculum which develops child creativity through free choice of activities around a common project. (AC)

  20. Renovando la Esperanza por una Educacion sin Exclusiones (Rekindling the Hope for an Education without Exclusion).

    ERIC Educational Resources Information Center

    Revista Interamericana de Educacion de Adultos, 2001

    2001-01-01

    Articles in this issue, written in Spanish, focus on the following: current status and outlook of youth and adult education; opening statement of the 50th anniversary commemoration; regional framework for the education of youth and adults in Latin America and the Caribbean; interculturalism and the education of youth and adults; participation of…

  1. Community Resources Guide for Central Florida = Una Guia de Recursos en la Comunidad de Florida Central.

    ERIC Educational Resources Information Center

    Medina, Linda, Comp.

    Designed to orient Hispanic refugees to the services that are available in Central Florida, this bilingual guide consists of a section of general information on living and working in the United States and a section devoted to various public and private agencies. Provided first are addresses and phone numbers of various government agencies:…

  2. Una Metodologia de Analisis de la Interaccion Alumno-Orgendaor en la Investigacion Sobre Informatica Educativa.

    ERIC Educational Resources Information Center

    Estepa, A.; And Others

    1992-01-01

    The recording of the interaction between pupil and computer is one of the data sources frequently used in research on the use of computers in teaching. Describes the analysis methodology of these recordings to determine the use of computers in statistics and its adaptation to other research work on the use of computers in education. (Author/MDH)

  3. Una mirada hacia el pasado -- El Telescopio Espacial James Webb - Duration: 31 seconds.

    NASA Video Gallery

    La NASA planea usar el nuevo Telescopio Espacial James Webb para mirar el pasado. Al observar la luz de las estrellas que se formaron al principio del universo, la NASA está a punto de arrojar nuev...

  4. [Clip Sheets from BOCES. Opportunities. Health. Careers. = Oportunidades. Salud. Una Camera En...

    ERIC Educational Resources Information Center

    State Univ. of New York, Geneseo. Coll. at Geneseo. Migrant Center.

    This collection of 83 clip sheets, or classroom handouts, was created to help U.S. migrants learn more about health, careers, and general "opportunities" including education programs. They are written in both English and Spanish and are presented in an easily understandable format. Health clip-sheet topics include the following: Abuse; AIDS;…

  5. Una guia para los padres a la educacion preescolar (A Parent's Guide to Preschool).

    ERIC Educational Resources Information Center

    Dodge, Diane Trister; Phinney, Joanna

    This booklet, in Spanish- and Japanese-language versions, offers parents guidance on how to partner with teachers to help their children acquire the skills, attitudes, and habits to do well in school and throughout life. The booklet begins with a description of how preschool children learn, and continues with a discussion of the goals of the

  6. A Guide to Delegate Preparation: UNA-USA Model UN Survival Kit. 1988-89 Edition.

    ERIC Educational Resources Information Center

    Muldoon, James P., Jr., Ed.; Diehl, John, Ed.

    Written by students for students, the purpose of the book, one of four components of the Model UN Survival kit, is to help prepare secondary and college student delegates for participation in Model United Nations (UN) Conferences. Model UN programs help students discover the difficulties of world political processes and understand other nations

  7. Protegiendo a nuestros ninos: una guia de accion (Safeguarding Our Children: An Action Guide).

    ERIC Educational Resources Information Center

    American Institutes for Research, Washington, DC. Center for Effective Collaboration and Practice.

    Although most schools are safe, they all can be safer. Improving school safety requires the strategic investment of time and dollars--scarce resources for which there are competing demands. Fortunately, schools that strategically coordinate schoolwide efforts are more likely to improve academic performance as well as reduce behavior problems. This…

  8. Exploración del Sistema Solar -- Una mirada hacia el futuro - Duration: 30 seconds.

    NASA Video Gallery

    ¿Piensas que ya sabemos todo acerca de nuestro sistema solar? La realidad es que apenas hemos comenzado con lo que hay para conocer. Únete a la NASA, en el envío de misiones a los confines del sist...

  9. Historia Verdadera de Una Gota de Miel. (The True Story of a Drop of Honey).

    ERIC Educational Resources Information Center

    Galarza, Ernesto

    Part of the series "Coleccion Mini-Libros" (Mini-Book Collection), the booklet is a factual account of the life of a bee. Designed to provide a tool for education of the Spanish-speaking child, as well as to stimulate an interest in Spanish among the youth of our country, the publication is a compilation of photographs with a description of bees

  10. Sistemas Eolicos Pequenos para Generacion de Electricidad: Una guia para consumidores en Nuevo Mexico

    SciTech Connect

    Not Available

    2007-09-01

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

  11. Sistemas Eolicos Pequenos para Generacion de Electricidad; Una guia para consumidores en los EE.UU.

    SciTech Connect

    Not Available

    2007-09-01

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

  12. Per una pedagogia della comprensione interculturale (A Method for Teaching Intercultural Understanding).

    ERIC Educational Resources Information Center

    Titone, Renzo

    1986-01-01

    Defines true bilingualism as biculturalism, explains what "understanding" another culture means, and describes how to evaluate the effectiveness of teaching methods for students from different cultures. Ideally, individuals learning a second language will acquire a "metacultural" consciousness that permits them to be comfortable in any cultural…

  13. Habitos Alimentarios e Higiene Dental en una Poblacion Preescolar de Madrid.

    ERIC Educational Resources Information Center

    Lafarga, R. Tarazona; And Others

    1991-01-01

    Nutriment habits and oral hygiene in a preschool population in Madrid were studied by stratification in public or private schools. Significant differences were found only with regard to consumption of fish. Vegetable and fruit consumption was low in both groups, but not statistically significant. (SH)

  14. Una experiencia europea de innovacion pedagogica basada en la escritura de un ibro.

    ERIC Educational Resources Information Center

    Montane, Mireia; Roc, Merce

    2002-01-01

    Describes a European project based on writing a book from an educational perspective. Participants included 18 schools from 13 countries. The study originated in a Spanish Comenius 3.1 project, which determined that university teams would visit "book writing" schools, supporting teachers and analyzing and publishing their experiences. After…

  15. Diseno y desarrollo de una base de datos bibliograficos (Design and Development of a Bibliographic Database).

    ERIC Educational Resources Information Center

    Mattenella, L. E.; Velazco, J. W.

    1992-01-01

    This article briefly describes the development of bibliographic retrieval systems in the Instituto de Beneficio di Minerales (IN BE MI) in Salta, Argentina, using the Mini-micro CDS/ISIS software developed by Unesco. (LRW)

  16. Guia Practica para una Evaluacion Alternativa (Practical Guide to Alternative Assessment).

    ERIC Educational Resources Information Center

    Herman, Joan L.; Aschbacher, Pamela R.; Winters, Lynn

    Guidance is offered in Spanish on the creation and use of alternative assessment, and a process model is presented that links assessment with curriculum and instruction, based on contemporary theories of learning and cognition. The introductory chapter provides background on the purposes of assessment and the need for new alternatives, with an…

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

    PubMed

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

    2010-12-01

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

  18. GERBERTVS una nuova rivista per l'astronomia e la scienza nell'alto medioevo

    NASA Astrophysics Data System (ADS)

    Sigismondi, C.

    GERBERTVS appears as an international e-journal on medieval science, namely astronomy. It has been created to gather all the studia promoted on Gerbert of Aurillac, the most prominent figure of the tenth century: astronomer, organ builder and music theoretician, mathematician, philosopher, and finally pope with the name of Silvester II (999-1003). Here is presented the first volume (2010) published in the institutional web site www.icra.it/gerbertus with the ISSN 2038-355X.

  19. The Complete Chloroplast and Mitochondrial Genomes of the Green Macroalga Ulva sp. UNA00071828 (Ulvophyceae, Chlorophyta)

    PubMed Central

    Melton, James T.; Leliaert, Frederik; Tronholm, Ana; Lopez-Bautista, Juan M.

    2015-01-01

    Sequencing mitochondrial and chloroplast genomes has become an integral part in understanding the genomic machinery and the phylogenetic histories of green algae. Previously, only three chloroplast genomes (Oltmannsiellopsis viridis, Pseudendoclonium akinetum, and Bryopsis hypnoides) and two mitochondrial genomes (O. viridis and P. akinetum) from the class Ulvophyceae have been published. Here, we present the first chloroplast and mitochondrial genomes from the ecologically and economically important marine, green algal genus Ulva. The chloroplast genome of Ulva sp. was 99,983 bp in a circular-mapping molecule that lacked inverted repeats, and thus far, was the smallest ulvophycean plastid genome. This cpDNA was a highly compact, AT-rich genome that contained a total of 102 identified genes (71 protein-coding genes, 28 tRNA genes, and three ribosomal RNA genes). Additionally, five introns were annotated in four genes: atpA (1), petB (1), psbB (2), and rrl (1). The circular-mapping mitochondrial genome of Ulva sp. was 73,493 bp and follows the expanded pattern also seen in other ulvophyceans and trebouxiophyceans. The Ulva sp. mtDNA contained 29 protein-coding genes, 25 tRNA genes, and two rRNA genes for a total of 56 identifiable genes. Ten introns were annotated in this mtDNA: cox1 (4), atp1 (1), nad3 (1), nad5 (1), and rrs (3). Double-cut-and-join (DCJ) values showed that organellar genomes across Chlorophyta are highly rearranged, in contrast to the highly conserved organellar genomes of the red algae (Rhodophyta). A phylogenomic investigation of 51 plastid protein-coding genes showed that Ulvophyceae is not monophyletic, and also placed Oltmannsiellopsis (Oltmannsiellopsidales) and Tetraselmis (Chlorodendrophyceae) closely to Ulva (Ulvales) and Pseudendoclonium (Ulothrichales). PMID:25849557

  20. "Necesita una vacuna": what Spanish-speakers want in text-message immunization reminders.

    PubMed

    Ahlers-Schmidt, Carolyn R; Chesser, Amy; Brannon, Jennifer; Lopez, Venessa; Shah-Haque, Sapna; Williams, Katherine; Hart, Traci

    2013-08-01

    Appointment reminders help parents deal with complex immunization schedules. Preferred content of text-message reminders has been identified for English-speakers. Spanish-speaking parents of children under three years old were recruited to develop Spanish text-message immunization reminders. Structured interviews included questions about demographic characteristics, use of technology, and willingness to receive text reminders. Each participant was assigned to one user-centered design (UCD) test: card sort, needs analysis or comprehension testing. Respondents (N=54) were female (70%) and averaged 27 years of age (SD=7). A card sort of 20 immunization-related statements resulted in identification of seven pieces of critical information, which were compiled into eight example texts. These texts were ranked in the needs assessment and the top two were assessed for comprehension. All participants were able to understand the content and describe intention to act. Utilizing UCD testing, Spanish-speakers identified short, specific text content that differed from preferred content of English-speaking parents. PMID:23974378

  1. A Guide to Delegate Preparation: UNA-USA Model UN Survival Kit. 1988-89 Edition.

    ERIC Educational Resources Information Center

    Muldoon, James P., Jr., Ed.; Diehl, John, Ed.

    Written by students for students, the purpose of the book, one of four components of the Model UN Survival kit, is to help prepare secondary and college student delegates for participation in Model United Nations (UN) Conferences. Model UN programs help students discover the difficulties of world political processes and understand other nations…

  2. Chile: Una Vision Politica, Economica y Social (Chile: A Political, Economic, and Social View).

    ERIC Educational Resources Information Center

    Cortes-Hwang, Adriana

    1972-01-01

    This address seeks to explain in brief the historical background and political, economic, and social conditions leading to the democratic election of a Marxist president in Chile. A historical sketch of Chilean government from independence in 1810 is provided with a description of the situation just before Salvador Allende's election in 1969. Some…

  3. Luchando por una educacion: A Qualitative Understanding of Undocumented Latina/o College Student Motivation

    ERIC Educational Resources Information Center

    Navarro, Elvia Lorena

    2013-01-01

    The current qualitative study explored the factors and resources that motivate undocumented Latino/a college students to persist in higher education. Through the data obtained from the four qualitative open-ended survey questions, a content analysis revealed specific codes, themes, and subthemes addressing the factors and resources that motivate

  4. Estrellas Wolf-Rayet y el medio interestelar: huellas de una fuerte interacción

    NASA Astrophysics Data System (ADS)

    Cichowolski, S.; Arnal, E. M.

    Se presentan resultados observacionales de un estudio de la distribución de hidrógeno neutro en los alrededores de estrellas Wolf-Rayet (WR) galácticas. Los datos de la línea de 21 cm provienen de observaciones de resolución angular intermedia (9') tomadas con el radiotelescopio de Effelsberg. La muestra está compuesta por cuatro WR de la serie del nitrógeno (WN): WR130, WR131, WR155, WR156 y tres WR de la serie del carbono (WC): WR154, WR117 y WR126. Este análisis ha permitido detectar cavidades y envolturas de HI en expansión presumiblemente vinculadas a dichas estrellas.

  5. Borders and Identity: A Resource Guide for Teachers = Identidad y Fronteras: Una Guia para Maestros.

    ERIC Educational Resources Information Center

    Belauus, Betty; Botein, Emily; Cadaval, Olivia

    The materials in this resource guide include a four-part video, a poster-size cultural map with additional exercises, and the five sections of this guide. The unit, presented in English and Spanish, intends to introduce students to the peoples and cultures of the U.S.-Mexico border, to explore the concept of borders in their own communities, to…

  6. Una guia para los padres a la educacion preescolar (A Parent's Guide to Preschool).

    ERIC Educational Resources Information Center

    Dodge, Diane Trister; Phinney, Joanna

    This booklet, in Spanish- and Japanese-language versions, offers parents guidance on how to partner with teachers to help their children acquire the skills, attitudes, and habits to do well in school and throughout life. The booklet begins with a description of how preschool children learn, and continues with a discussion of the goals of the…

  7. Per una pedagogia della comprensione interculturale (A Method for Teaching Intercultural Understanding).

    ERIC Educational Resources Information Center

    Titone, Renzo

    1986-01-01

    Defines true bilingualism as biculturalism, explains what "understanding" another culture means, and describes how to evaluate the effectiveness of teaching methods for students from different cultures. Ideally, individuals learning a second language will acquire a "metacultural" consciousness that permits them to be comfortable in any cultural

  8. Confieso que Divulgo. Reflexiones y Experiencias de una Astrofísica

    NASA Astrophysics Data System (ADS)

    Rodríguez Hidalgo, I.

    Este artículo presenta algunas reflexiones en torno a la popularización de la Ciencia, desarrolladas a lo largo de mi trayectoria profesional, un camino inacabado desde la intuición al oficio. Tras revisar las señas de identidad de la divulgación científica, se exponen ideas, experiencias y recursos, cribados por la práctica y su posterior análisis crítico. Se destacan las actividades relacionadas con la Astronomía, que se cuentan entre las más espectaculares y gratificantes. Confessions of a popularizer: This paper presents some author's thoughts about scientific outreach, developed along her professional path, an unfinished way from intuition to trade. First, identity signs of outreach are revised; then, ideas, experiences and resources, sifted by practice and further critical analysis, are reviewed. Activities related to Astronomy, being one of the most spectacular and rewarding, are remarked 1

  9. Una Visita al Viejo San Juan (A Visit to Old San Juan).

    ERIC Educational Resources Information Center

    Cabello, Victor; And Others

    Written in Spanish, this black and white illustrated booklet provides a tour of Old San Juan, Puerto Rico's oldest and most historic city. Brief historical information is provided on the Perro de San Jeronimo, a statue of a barking dog found in front of the Castillo; Plaza de Colon, a small plaza dedicated to Christopher Columbus; the Catedral de…

  10. Mi Vecina es una Mujer Colpeada (My Neighbor Is a Battered Woman).

    ERIC Educational Resources Information Center

    Howard, Melissa

    This book, the Spanish version of "My Neighbor is a Battered Woman," is intended as a general introduction to the problems of battered women. The format for part 1 consists of the presentation of facts about wife beating, i.e., who are victims, characteristics of batterers, the environment in which family violence exists, and services for battered…

  11. Establishing the Empirical Relationship Between Non-Science Majoring Undergraduate Learners' Spatial Thinking Skills and Their Conceptual Astronomy Knowledge. (Spanish Title: Estableciendo Una Relación Empírica Entre el Razonamiento Espacial de los Estudiantes de Graduación de Carreras no Científicas y su Conocimento Conceptual de la Astronomía.) Estabelecendo Uma Relação Empírica Entre o RacioCínio Espacial dos Estudantes de Graduação EM Carreiras Não Científicas e Seu Conhecimento Conceitual da Astronomia

    NASA Astrophysics Data System (ADS)

    Heyer, Inge; Slater, Stephanie J.; Slater, Timothy F.

    2013-12-01

    The astronomy education community has tacitly assumed that learning astronomy is a conceptual domain resting upon spatial thinking skills. As a first step to formally identify an empirical relationship, undergraduate students in a non-major introductory astronomy survey class at a mediumsized, Ph.D. granting, mid-western US university were given pre- and post-astronomy conceptual diagnostics and spatial reasoning diagnostics, Instruments used were the "Test Of Astronomy Standards" and "What Do You Know?" Using only fully matched data for analysis, our sample consisted of 86 undergraduate non-science majors. Students' normalized gains for astronomy surveys were low at .26 and .13 respectively. Students' spatial thinking was measured using an instrument designed specifically for this study. Correlations between the astronomy instruments' pre- to post-course gain scores and the spatial assessment instrument show moderate to strong relationships suggesting the relationship between spatial reasoning and astronomy ability can explain about 25% of the variation in student achievement. La comunidad de educación en astronomía ha supuesto de forma tácita que el aprendizaje de la astronomía consiste en un dominio conceptual fundamentado en el razonamiento espacial. Como un primer paso para identificar formalmente una relación empírica entre estas dos cosas, utilizamos como muestra los estudantes de graduación de carreras no científicas de un curso experimental en una universidad norteamericana del medioeste de porte mediano con programa de Doctorado em curso, en el cual estos estudiantes se sometieron a un diagnóstico de razonamiento espacial y conceptos astronómicos antes e después del mismo. Las herramientas utilizadas fueron el Test Of Astronomy Standards (TOAST) y el cuestionario What do you know? Utilizando solo los datos completamente consistentes para este análisis, nuestra muestra consistió en 86 estudantes de graduación. Las mejoras, depués de normalizadas, en el desempeño de los estudiantes en estos dos asuntos foram pequenas, 0.26 e 0.13 respectivamente. El razonamiento espacial de los estudiantes fue medido utilizando un instrumento específico desarrollado para este trabaljo. Las correlaciones entre los resultados de los tests astronómicos y este instrumento específico, antes y después del curso mostraron una relación entre moderada y fuerte, sugiriendo que la relación entre el razonamiento espacial y el conocimiento astronómico puede explicar hasta un 25% de la variación em el desempeño de los estudiantes. A comunidade da educação em astronomia tem suposto de forma implícita que o aprendizado da astronomia consiste em um domínio conceitual fundamentado no raciocínio espacial. Como um primeiro passo para identificar formalmente uma relação empírica entre estas duas coisas, utilizamos como amostra os estudantes de graduação de carreiras não científicas de um curso exploratório em uma universidade norte-americana do meio-oeste de médio porte com programa de Doutorado em andamento, onde estes estudantes foram submetidos a um diagnóstico de raciocino espacial e conceitos astronômicos antes e depois do mesmo. As ferramentas utilizadas foram o Test Of Astronomy Standards (TOAST) e o questionário What do you know? Utilizando somente dados completamente consistentes para esta análise, nossa amostra consistiu de 86 estudantes de graduação. As melhoras, depois de normalizadas, do desempenho dos estudantes nos dois quesitos foram pequenas, 0.26 e 0.13 respectivamente. O raciocínio espacial dos estudantes foi medido utilizando um instrumento específico desenhado para este trabalho. As correlações entre os resultados dos testes astronômicos e este instrumento específico antes e depois do curso mostraram uma relação entre moderada e forte, sugerindo que a relação entre o raciocínio espacial e o conhecimento astronômico pode explicar até um 25% na variação no desempenho dos estudantes.

  12. Pharmacognostical evaluation of aerial parts of Graptophyllum pictum (L.) Griff. (Syn: Justicia picta Linn.): A well-known folklore medicinal plant

    PubMed Central

    Singh, Pradeep; Khosa, Ratan L.; Mishra, Garima; Jha, Keshri K.

    2015-01-01

    Objective: Graptophyllum pictum (L.) Griff. (Family-Acanthaceae) occupies a key role in traditional system of medicine. Since an extensive literature survey did not provide any information about studies on its standardization. Therefore, we designed the current study to establish the quality control parameters of G. pictum aerial parts. Materials and Methods: The investigation included determination of various standardization parameters such as macroscopic and microscopic studies, physicochemical parameters as well as phytochemical analysis of the crude drug. Results: The microscopy study of aerial parts revealed that stem shows typical dicotyledonous characters with prismatic crystals of calcium oxalate in the cortical region and dorsiventral leaf. Physicochemical constants such as moisture content, ash values, fluorescence analysis, and extractive values were established. Preliminary phytochemical analysis confirmed the presence of alkaloids, flavonoids, saponins, tannins, etc. Conclusion: The present study suggests establishing the parameters for pharmacopoeial standardization of G. pictum. PMID:26283808

  13. Experimental and Clinical Pharmacology of Andrographis paniculata and Its Major Bioactive Phytoconstituent Andrographolide

    PubMed Central

    Jayakumar, Thanasekaran; Hsieh, Cheng-Ying; Lee, Jie-Jen; Sheu, Joen-Rong

    2013-01-01

    Andrographis paniculata (Burm. F) Nees, generally known as “king of bitters,” is an herbaceous plant in the family Acanthaceae. In China, India, Thailand, and Malaysia, this plant has been widely used for treating sore throat, flu, and upper respiratory tract infections. Andrographolide, a major bioactive chemical constituent of the plant, has shown anticancer potential in various investigations. Andrographolide and its derivatives have anti-inflammatory effects in experimental models asthma, stroke, and arthritis. In recent years, pharmaceutical chemists have synthesized numerous andrographolide derivatives, which exhibit essential pharmacological activities such as those that are anti-inflammatory, antibacterial, antitumor, antidiabetic, anti-HIV, antifeedant, and antiviral. However, what is noteworthy about this paper is summarizing the effects of andrographolide against cardiovascular disease, platelet activation, infertility, and NF-κB activation. Therefore, this paper is intended to provide evidence reported in relevant literature on qualitative research to assist scientists in isolating and characterizing bioactive compounds. PMID:23634174

  14. Una novedosa herramienta estadística para desentrañar las características intrínsecas de una distribución de datos astrofísicos

    NASA Astrophysics Data System (ADS)

    Ferrero, I.; Piatti, A. E.

    The statistical analysis of a sample of data includes the collection; the analysis and the interpretation of them. For example; the construction of histograms has proven to be a powerful tool in statistics; from which it is possible to obtain an overview of the distribution of the data sample considered. In some circumstances; however; the results often depend on the way they are constructed (e.g. size of the bins used; etc.) leading to a variety of possible interpretations. Specifically; this paper presents a statistical method that allows to unravel the intrinsic distribution of a n-dimensional data distribution from "adaptive bins" and the consideration of the errors of the data used. FULL TEXT IN SPANISH

  15. Una Nueva IDEA: Una Guia para Padres acerca de los Cambios en la Ley de Educacion Especial para Ninos con Incapacidades (A New IDEA: A Parent's Guide to the Changes in Social Education Law for Children with Disabilities).

    ERIC Educational Resources Information Center

    Seltzer, Tammy

    This guide for parents, in Spanish, explains the changes in the federal special education law resulting from the 1997 amendments to the Individuals with Disabilities Education Act (IDEA). Changes related to the parent's role in decisions about the child's education and in how schools can discipline special education students are highlighted. A…

  16. La Migracion Como Una Transicion Critica para la Persona en Su Ambiente. Una Interpretacion Organismico Evolutiva. (Migration as a Critical Person-in-Environment Transition: An Organismic-Developmental Interpretation.)

    ERIC Educational Resources Information Center

    Pacheco, Angel M.; And Others

    In order to explore some of the changes and stresses connected with migration and return migration, a study was conducted among migrants returning from the United States mainland to Puerto Rico. The sample consisted of 75 adolescents participating in a Bilingual Education program in Puerto Rico. Data were collected using Psychological Distance…

  17. Incidental Vocabulary Learning in Second Language Acquisition: A Literature Review (Aprendizaje incidental de vocabulario en la adquisición de una segunda lengua: una revisión de literatura)

    ERIC Educational Resources Information Center

    Restrepo Ramos, Falcon Dario

    2015-01-01

    This literature review aims to analyze previous studies that address the incidental learning of vocabulary in second language acquisition. The articles included in this literature review look into the understanding of vocabulary learning through incidental means, the relationship of reading and incidental vocabulary learning, and the strategies…

  18. Peer Interaction: A Social Perspective towards the Development of Foreign Language Learning (Interacción entre pares: una perspectiva social hacia el desarrollo del aprendizaje en una lengua extranjera)

    ERIC Educational Resources Information Center

    Gómez Lobatón, July Carolina

    2011-01-01

    This pedagogical innovation aims at discovering new ways of interaction that go beyond the unidirectional relationship that is presented in the classrooms most of the times. The innovation considers peers to be active agents in the construction of knowledge and proposes new ways to arrange groups in the classroom so that the arrangement can…

  19. Una Escoba para Ana, Cien Oficios para Juan. Quinto Modulo de una Serie para Maestros de Escuela Elemental. (A Broom for Anna, A Hundred Jobs for John. Fifth Module of a Series for Elementary School Teachers).

    ERIC Educational Resources Information Center

    Molina, Carmen Eneida, Ed.; And Others

    This guide for teachers, in English and Spanish, examines the stereotyped work roles assigned to men and women. The guide examines educational materials that perpetuate these roles and presents teaching alternatives which reinforce students' self esteem and confidence. A pre-test and post-test are included to measure the user's awareness of…

  20. Il volto della Luna da Plutarco a Newton. Storia di una teoria ellenistica della gravità

    NASA Astrophysics Data System (ADS)

    Cappi, Alberto

    2013-03-01

    In his dialogue "De Facie quae in Orbe Lunae apparet", Plutarch includes a discussion on a non-Aristotelian theory of gravity. I describe how this theory could be developed during the Hellenistic period and its influence on the cosmological debate along the centuries until the beginning of modern science. (Text in Italian)

  1. Una Nacion En Peligro: La Necesidad Imperiosa de Reformar La Ensenanza. (A Nation at Risk: The Imperative for Educational Reform).

    ERIC Educational Resources Information Center

    National Commission on Excellence in Education (ED), Washington, DC.

    This report: (1) investigates the declining state of the educational system in America, as measured by high school student performance in the United States and other countries; (2) identifies specific problem areas; and (3) offers multiple recommendations for improvement. The five major recommendations arrived at appear, respectively, under the…

  2. Una Vida de Esperanza (A Life of Hope). Out of Poverty and Violence Comes the Poetry of Luis Rodriguez.

    ERIC Educational Resources Information Center

    Bullard, Sara, Ed.

    1993-01-01

    Explores the childhood and adolescence of the Hispanic American poet Luis Rodriguez, who grew up in Los Angeles (California) and was involved in gangs with other children of Mexican immigrants. Rodriguez's autobiography is offered so that adolescents, including his own son, may learn from his experience. (SLD)

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

    PubMed Central

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

    2011-01-01

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

  4. Reconnaissance evaluation of Honduran geothermal sites. Una evaluacion por medio de reconocimiento de seis areas geotermicas en Honduras

    SciTech Connect

    Eppler, D.; Fakundiny, R.; Ritchie, A.

    1986-12-01

    Six geothermal spring sites were selected on the basis of preliminary investigations conducted in Honduras over the last decade and were evaluated in terms of their development potential. Of the six, the Platanares and San Ignacio sites have high base temperatures and high surface fluid discharge rates and appear to have the best potential for further development as sources of electrical power. A third site, Azacualpa, has a high enough base temperature and discharge rate to be considered as a back-up, but the logistical problems involved in geophysical surveys make it less attractive than the two primary sites. Of the remaining three sites, Pavana may be a source of direct-use heat for local agricultural processing. Sambo Creek and El Olivar have either severe logistical problems that would impede further investigation and development or base temperatures and flow rates that are too low to warrant detailed investigation at this time.

  5. Linguistica applicata e glottodidattica: Una collana per insegnanti (Applied Linguistics and Language Teaching: A Series for Teachers).

    ERIC Educational Resources Information Center

    Salvi, Rita

    1988-01-01

    A series on language teaching and learning for teachers includes books on the following topics: (1) psycholinguistics (Titone); (2) the role of the brain in language acquisition (Danesi); (3) the creative language of children (Crema & De Robertis); and (4) suggestopedia (Lozanov & Gateva). (CFM)

  6. Hacia una adaptación cultural para el tratamiento de trastornos alimentarios en latinos en Estados Unidos

    PubMed Central

    Reyes-Rodríguez, Mae Lynn; Bulik, Cynthia M.

    2011-01-01

    Eating disorders affect all ethnic and socioeconomic groups. However, evidence based treatments for eating disorders have been developed and tested exclusively on Caucasian populations. With the purpose to develop a culturally sensitive framework for the eating disorders treatment in Latinos/as, the objectives of this work were: 1) identify and describe some of the relevant cultural elements for eating disorders in the Latino population and, 2) to draft a culturally sensitive intervention model for eating disorders in Latino population in the United States. Providing culturally sensitive treatments for Latinos with psychiatric disorders is essential to reverse public health disparities. PMID:22003472

  7. La Formacion Docente y la Educacion Primaria en Una Propuesta de Cambio (Teacher Training on Education: A Proposal for Change).

    ERIC Educational Resources Information Center

    Fernandez, Enrique Alonso, Ed.

    In order to raise the quality of teaching and teacher education in Uruguay, a program of innovation and change was considered at a 1986 educational conference. Conference goals included identifying ways to: (1) increase opportunities to promote innovation and change; (2) search for strategies to encourage creative problem solving; (3) increase…

  8. Una formalizacion tentativa del problema de la barrera linguistica (A Tentative Formalization of the Problem of Linguistic Barriers).

    ERIC Educational Resources Information Center

    Zierer, Ernesto

    1971-01-01

    The formulas presented in this paper provide the means for showing the ease with which scientific information can be passed from one language into another. The formulas are based on several factors. The linguistic barrier can be measured to illustrate the relative degree of difference between two languages based on a comparison of vocabulary,…

  9. A Guide for Parents about Retention and Promotion = Una Guia para los Padres de Familia sobre Retencion y Promocion.

    ERIC Educational Resources Information Center

    State Univ. of New York, Oneonta. Coll. at Oneonta. Eastern Stream Center on Resources and Training.

    This bilingual (English and Spanish) brochure explains why retention is common among migrant students and what parents can do to help their children succeed in school. By second grade, nearly 50 percent of migrant students in the nation are older than their classmates and only about 50 percent of migrant students graduate from high school.…

  10. Una vision holistica de la educacion superior en contextos posmodernos (The Integrative Conception of Postmodern Higher Education).

    ERIC Educational Resources Information Center

    Zoreda, Margaret Lee; Zoreda-Lozano, Juan Jose

    This paper argues that current "postmodern" conditions demand a rethinking of higher education, especially in countries like Mexico. This would involve the rapprochement of science, technology, and the humanities, based on the belief that the chasm separating them, apart from being artificial, is no longer socially viable. Through a critical…

  11. Intensive Behavioral Intervention for School-Aged Children with Autism: Una Breccia nel Muro (UBM)--A Comprehensive Behavioral Model

    ERIC Educational Resources Information Center

    Fava, Leonardo; Vicari, Stefano; Valeri, Giovanni; D'Elia, Lidia; Arima, Serena; Strauss, Kristin

    2012-01-01

    Although, reviews and outcome research supports empirical evidence for Early Intensive Behavior Intervention in pre-scholars, intensive behavioral service provision for school-aged children with autism spectrum disorders (ASD) are less subject to research studies. In order to provide effective behavioral interventions for school-aged children it…

  12. Personal Safety for Children: A Guide for Parents = Una guia para los padres sobre la seguridad personal de los ninos.

    ERIC Educational Resources Information Center

    Department of Justice, Washington, DC.

    Noting that parents and teachers have the responsibility of safeguarding children and teaching them the skills they need to be safe, this pamphlet, in Spanish and English versions, is designed to help parents talk to their children about how to protect themselves against abduction and exploitation. The pamphlet is organized into six sections.…

  13. Our Treasures: A Celebration of Nebraska's Mexican Heritage = Nuestros Tesoros: Una celebracion de la herencia mexicana de Nebraska.

    ERIC Educational Resources Information Center

    Nebraska State Historical Society, Lincoln.

    This publication is intended as a resource guide for teachers, students, and librarians interested in Mexican American culture, and for groups wishing to conduct local community research using oral histories. The Mexican American Traditions in Nebraska project was designed to document and preserve the richness of Nebraska's Mexican culture. The…

  14. Una Guia Para Los Tutores del Programa de Alfabetizacion en Espanol (Guide for Spanish Literacy Program Tutors).

    ERIC Educational Resources Information Center

    Schildgen, Emilia G., Comp.

    Ideas and guidance for literacy program tutors are offered. This guide presents the characteristics of an adult learner, in contrast to a student from elementary or high school, and describes how the relationship between the tutor and the student should be established and maintained. Goals should be set up at the beginning of the program, keeping…

  15. How To Start a Family Day Care = Como Iniciar una Guarderia en El Hogar. [Videotape and Viewer's Guide].

    ERIC Educational Resources Information Center

    Raphael, Doris; Weisman, Douglas

    Being a family day care provider is work that requires professional responsibilities and attention to the physical, emotional, and educational well-being of children; listening and responding to parents; and running a business. This videotape, in English- and Spanish-language versions, explores the elements involved in starting up a family day…

  16. Distribución superficial de impactos en Iapetus originada por el remanente de una colisión

    NASA Astrophysics Data System (ADS)

    Zoppetti, F. A.; Leiva, A. M.; Briozzo, C. B.

    2015-08-01

    By means of Circular Restricted Three Body Problem Saturn--Iapetus, we analize potential impact distributions on the surface of Iapetus, originated from considering a low-energy population generated as remnants of a collisional event occurred in the past on the surface of this satellite. The results are analized in order to offer a new approach to explain the origin of the albedo dichotomy observed on Iapetus.

  17. How To Start a Family Day Care = Como Iniciar una Guarderia en El Hogar. [Videotape and Viewer's Guide].

    ERIC Educational Resources Information Center

    Raphael, Doris; Weisman, Douglas

    Being a family day care provider is work that requires professional responsibilities and attention to the physical, emotional, and educational well-being of children; listening and responding to parents; and running a business. This videotape, in English- and Spanish-language versions, explores the elements involved in starting up a family day

  18. Una Mejor Opportunidad para Aprender: La Educacion Bilingue Bicultural (A Better Chance to Learn: Bilingual-Bicultural Education).

    ERIC Educational Resources Information Center

    Commission on Civil Rights, Washington, DC.

    The effectiveness of bilingual bicultural education as a means of increasing the opportunities of language minority students is examined in this report, which is addressed to educators and the general public. First, an introduction defines key terms, briefly outlines controversies which surround bilingual education, and describes the contents of

  19. Educacion Ambiental en las Escuelas: Creando una Programa que Funcione! (Environmental Education in the Schools: Creating a Program That Works!).

    ERIC Educational Resources Information Center

    Braus, Judy A.; Wood, David

    This book is a manual that enables teachers to formulate an effective program of environmental education across multiple grade levels and cultural settings. A section provides tips for using the book, followed by nine chapters dealing with different aspects of developing and implementing an environmental education program. Chapter 1 presents a…

  20. Puentes hacia una mejor vida (Bridges to a Better Life): Outcome of a Diabetes Control Peer Support Intervention

    PubMed Central

    Ayala, Guadalupe X.; Ibarra, Leticia; Cherrington, Andrea L.; Parada, Humberto; Horton, Lucy; Ji, Ming; Elder, John P.

    2015-01-01

    PURPOSE Peer support can promote diabetes control, yet research on feasible and effective peer support models is lacking. This randomized controlled trial tested a volunteer-based model of peer support for diabetes control. METHODS Thirty-four volunteer peer leaders were recruited and trained to provide support to 5 to 8 patients each through telephone contact, in-person, individual, and group support. Planned dose was 8 contacts, preferably in the first 6 months. Patients with uncontrolled diabetes were randomly sampled from the medical records of 3 community clinics. After a baseline interview and medical records review to obtain baseline values for the primary outcome, HbA1c, 336 patient participants were randomly assigned to a 12-month peer support intervention or usual care. The assessment protocol was repeated at 6 and 12 months after baseline. RESULTS Thirty peer leaders delivered an average of 4 contacts each per assigned participant (range 1–24). Despite the lack of intervention fidelity, the intervention was effective at reducing glycated hemoglobin (HbA1c) among intervention as compared with usual care participants (P=0.05). Similar trends were observed in frequency of meeting fruit and vegetable guidelines (P =0.09), a secondary outcome. Counterintuitively, usual care participants reported checking their feet more days out of 7 than intervention participants (P =0.03). CONCLUSIONS Given the modest changes we observed, combined with other evidence for peer support to promote diabetes control, additional research is needed on how to modify the system of care to increase the level of peer support delivered by volunteers. PMID:26304977

  1. La Formacion Docente y la Educacion Primaria en Una Propuesta de Cambio (Teacher Training on Education: A Proposal for Change).

    ERIC Educational Resources Information Center

    Fernandez, Enrique Alonso, Ed.

    In order to raise the quality of teaching and teacher education in Uruguay, a program of innovation and change was considered at a 1986 educational conference. Conference goals included identifying ways to: (1) increase opportunities to promote innovation and change; (2) search for strategies to encourage creative problem solving; (3) increase

  2. El Desarrollo Social de los Ninos: Una Lista de Cotejo. ERIC Digest. (Young Children's Social Development: A Checklist. ERIC Digest.)

    ERIC Educational Resources Information Center

    McClellan, Diane E.; Katz, Lilian G.

    The best childhood predictor of later adult adaptation is the adequacy with which a child gets along with other children. Because social development begins in the early years, it is appropriate that early childhood programs include regular formal and informal assessment of children's acquisition of social competence. This digest presents the…

  3. Promoviendo una Alimentación Saludable (PAS) Design and Methods: Engaging Latino Families in Eating Disorder Treatment

    PubMed Central

    Reyes-Rodríguez, Mae Lynn; Bulik, Cynthia M.; Hamer, Robert M.; Baucom, Donald H.

    2013-01-01

    The use of culturally sensitive intervention could improve mental health care for the eating disorders treatment in the Latino population. The aim of this report is to describe the rationale, design, and methods of the ongoing study entitled “Engaging Latino families in eating disorders treatment.” The primary aim of the study is to compare (a) the combined effect of individual cognitive behavioral therapy for bulimia nervosa (CBT-BN) that has been previously adapted for the Latino population plus Family Enhanced (FE) modules, with (b) the standard adapted individual CBT-BN in a proof-of-principle study with 40 Latina adults with eating disorders and one relative or significant other per patient. We hypothesize that 1) the feasibility, acceptability, and adherence of participants in CBT-BN+ FE will be superior to individual CBT-BN only; 2) relatives in CBT-BN+ FE will report greater treatment satisfaction, greater reduction in family conflict, and greater decreases in caregiver burden than relatives in the individual CBT-BN only condition; and 3) patients who participate in CBT-BN+ FE will show trends towards greater decreases in ED symptoms compared with patients in CBT-BN only; although power will be limited to detect this difference. However, we predict that they will show greater retention in treatment, greater treatment satisfaction, and greater decreases in family conflict than patients in CBT-BN only. The completion of this investigation will yield important information regarding the acceptability and feasibility of a culturally sensitive evidence-based treatment model for Latinos with eating disorders. (Word Count=240) PMID:23376815

  4. Estudios de medicina de precisión para cáncer: empieza una nueva era

    Cancer.gov

    Avances en genómica, en exploraciones con imágenes, bioinformática y disciplinas relacionadas nos permiten diseñar estudios más pequeños, más rápidos y más inteligentes que incorporan los principios esenciales de la medicina de precisión.

  5. Hacia una adaptación cultural para el tratamiento de trastornos alimentarios en latinos en Estados Unidos.

    PubMed

    Reyes-Rodríguez, Mae Lynn; Bulik, Cynthia M

    2010-01-01

    Eating disorders affect all ethnic and socioeconomic groups. However, evidence based treatments for eating disorders have been developed and tested exclusively on Caucasian populations. With the purpose to develop a culturally sensitive framework for the eating disorders treatment in Latinos/as, the objectives of this work were: 1) identify and describe some of the relevant cultural elements for eating disorders in the Latino population and, 2) to draft a culturally sensitive intervention model for eating disorders in Latino population in the United States. Providing culturally sensitive treatments for Latinos with psychiatric disorders is essential to reverse public health disparities. PMID:22003472

  6. Desarrollo de una intervención grupal para la prevención del VIH en parejas heterosexuales1

    PubMed Central

    Pérez-Jiménez, David; Escabí Montalvo, Aracelis; del Carmen Cabrera Aponte, María

    2012-01-01

    HIV preventive efforts with heterosexual couples are almost nonexistent. We designed a group intervention based on the Information-Motivation-Behavioral Skills model with the aim of increasing male condom use and promoting the practice of mutual masturbation as a safer sex alternative. We carried out a pilot study with four couples to evaluate the feasibility of the intervention and the aspects of content and format that needed to be modified. Findings reflect that participants were very satisfied with the intervention and they found it entertaining and innovative. They were very comfortable with its format, as well as with the activities. The findings confirm the feasibility of this intervention and the need to direct preventive efforts to this population. PMID:23847716

  7. Una miscelanea de refranes espanoles raros, curiosos, y jocosos (A Miscellany of Rare, Curious and Humorous Spanish Proverbs).

    ERIC Educational Resources Information Center

    Hayes, Francis

    This listing of unusual Spanish proverbs contains words of wisdom on money, doctors, agriculture, students, procrastination, pessimism, war, good and evil, religion, God, and a host of other topics. The topic of each proverb is given in English. (CHK)

  8. Compartiendo la Ciencia con los Ninos: Una Guia para los Padres (Sharing Science with Children: A Guide for Parents).

    ERIC Educational Resources Information Center

    North Carolina Museum of Life and Science, Durham.

    This guide offers Spanish-speaking parents ways in which they can help their children learn about science at home and in the community. Science is a way of looking at the world. It uses everyday techniques such as observation and classification to give us information about things and how they work. Advice to parents that want to support their…

  9. Una Guia de Consejos Practicos Sobre la Lectura para los Padres (A Guide to Reading Tips for Parents).

    ERIC Educational Resources Information Center

    Department of Education, Washington, DC.

    The No Child Left Behind program changes the federal role in education by asking America's schools to describe their success in terms of what each student accomplishes. The information in this reading guide, presented in Spanish, was developed by the United States Department of Education to assist parents, caregivers, and teachers in understanding…

  10. Bienvenido a los Estados Unidos. Una Guia para Refugiados (Welcome to the United States. A Guide for Refugees). First Edition.

    ERIC Educational Resources Information Center

    Economic and Social Research Council, Edinburgh (Scotland). Centre for Educational Sociology.

    This guidebook provides Spanish-speaking refugees being resettled in the United States with general information about what they will encounter and the services they can receive in their first months in the country. This is the Spanish version, and is available in several other languages. The book is distributed to overseas processing agencies,…

  11. Una Crisis para la Educacion Bilingue en Nuevo Mexico. (A Crisis for Bilingual Education in New Mexico)

    ERIC Educational Resources Information Center

    Benavides, Ezequiel

    1976-01-01

    Written in Spanish and English, this article briefly reviews the bilingual picture in New Mexico. If New Mexico is to succeed in attracting Federal monies for bilingual education, it must strive for unity in its efforts and objectives. (NQ)

  12. Simulation of the roughness of the border of a molecule. Simulacion del arrugamiento del borde de una monocapa

    SciTech Connect

    Ramirez, R.; Schneider, M.; Rahman, A.; Schuller, I.K.

    1987-02-01

    We have solved, using molecular dynamics techniques, a model which consists of a 487-particle movable overlayer on an infinite rigid substrate. The interaction J/sub 1/ between the boundary and interior atoms of the overlayer is weaker than those between interior atoms. We have found that the roughness of the border of the overlayer increases with increasing temperature and with decreasing J/sub 1/, contrary to the interpretation of Kolaczkiewicz and Bauer of their experiment of an overlayer of Au on a W substrate. We also argue that the Kolaczkiewicz-Bauer claim that their experimental setup is a realization of the Abraham model for the 2D ferromagnetic Ising model, has to be revised.

  13. Schoolwide Programs: Parents' Guide & Capacity-Building Materials = Programas Schoolwide: Una Guia para Padres y Materias de Capacitacion.

    ERIC Educational Resources Information Center

    WestEd, San Francisco, CA.

    The reauthorization of Title I (Improving America's Schools Act--IASA) made the Schoolwide Program (Schoolwide) a major strategy for schools with high poverty rates and stressed the importance of parent involvement. This guide was developed to provide professional development and parent education on Schoolwide implementation in California. The…

  14. La Traduccion Simultanea como Materia en Una Carrera de Lenguas (Simultaneous Translation as a Course in a Foreign Language Program)

    ERIC Educational Resources Information Center

    Bradley, D.

    1977-01-01

    A description of the foreign language curriculum at the university level in which courses in simultaneous translation are required. The size and composition of the groups are described as well as methods used to develop skill in translating and interpreting. Results are assessed. (Text is in Spanish.) (AMH)

  15. Ionización en una atmósfera de carbono deficiente en hidrógeno

    NASA Astrophysics Data System (ADS)

    Milone, L. A.; Merlo, D. C.

    Assuming that LTE prevails, the ionization stage was analyzed in the atmosphere of a hydrogen defficient carbon (HdC) star: Y = 0.928, Zc = 0.056, X = 7 × 10-5, and remaining elements in approximately solar abundance (Z = 0.072). It is shown that in the shallower atmospheric layers, electron density in HdC is similar to that found in normal stars (as a consequence of assuming a quite similar metal abundance); in intermediate layers, C is the principal electron-donor, resembling H in normal composition stars, but similarity is not complete, as C is not so abundant in these stars as H is in normal stars (0.70 <= X <= 0.75). In deeper layers, He is the principal electron contributor. These facts, as well as the chemical composition, bring some consequences on the absorption in the stellar atmosphere; in solar composition stars, population II and HdC stars of medium temperature (5000 <= T <= 8000 K), the importance of different absorbers was analyzed. It was found that in the visual region, the absorption in a HdC star atmosphere is smaller than in a normal star. This paper will be published in full elsewhere and further details will be given there.

  16. Una prueba empírica de generadores de nümeros pseudoaleatorios mediante un proceso de decaimiento exponencial

    NASA Astrophysics Data System (ADS)

    Coronel-Brizio, H. F.; Hernández-Montoya, A. R.; Jiménez-Montaño, M. A.; Mora-Forsbach, L. E.

    2007-10-01

    Empirical tests for pseudorandom number generators based on the use of processes or physical models have been successfuly used and are considered as complementary to theoretical test of randomness. In this work a statistical methodology for evaluating the quality of pseudorandom number generators is presented. The method is illustrated in the context of the so-called exponential decay process, using some pseudorandom number generators commonly used in physics.

  17. What's in a Word? Elementary Students Learn a Lesson in the Language of Respect. Los Estudiantes de Primaria Aprenden una Leccion en el Lenguaje del Respeto.

    ERIC Educational Resources Information Center

    Maddalozzo, Rebecca

    2001-01-01

    Describes how one elementary teacher helped students in her class and in the entire school see through ethnic biases and feel proud of being bilingual or having bilingual friends. Her efforts taught the children that bilingual students are very much like their non-bilingual classmates in being unique people with talents that should be respected.…

  18. Aunque cerca...sano: Una guia para prevencion de los riesgos de los pesticidas (Although Nearby...Healthy: A Guide for the Prevention of Pesticide Risks).

    ERIC Educational Resources Information Center

    Saenz, Salvador

    Intended for Spanish-speaking farmworkers with children, this publication in comic book format tells these parents how they can protect their children from pesticide risks. On returning home from work, one farmworker couple does not hug their young children. When their behavior is questioned by neighbors, the mother explains that the fields were…

  19. El Arte de Aprender: Una Aventura Cooperativa. Un guia de recursos para trabajar con ninos jovenes. (Learning: A Cooperative Adventure. A Resource Guide for Working with Young Children.)

    ERIC Educational Resources Information Center

    Arizona State Dept. of Education, Phoenix.

    Due to the large numbers of children from Spanish-speaking homes, many districts send both English and Spanish written communication to parents and community members. Therefore this booklet, a Spanish translation of "Learning: A Cooperative Adventure" (ED 119 868), was prepared to provide parents and preschool and kindergarten staff members with…

  20. Work and Family in the United States: A Policy Initiative. A Report of the Family Policy Panel of the Economic Policy Council of UNA-USA.

    ERIC Educational Resources Information Center

    United Nations Association of the United States of America, New York, NY.

    As part of its world employment project, the Economic Policy Council of the United Nations Association of the United States formed the family policy panel to further examine the extent of ongoing changes affecting the family, the workplace, and the economy. In its work, the family policy panel concentrated on five issues considered central to the

  1. Un nuevo fármaco puede ser una opción de tratamiento para algunos cánceres de mama

    Cancer.gov

    Los resultados de un estudio clínico internacional permiten suponer que, en poco tiempo, habrá otra opción de tratamiento para las mujeres con cáncer de mama metastásico HER2 positivo que deja de responder a los tratamientos dirigidos con trastuzumab.

  2. Planteamientos multiculturales en la educacion: una experiencia alemana. Studies and Evaluation Papers 14. (Multicultural Approaches in Education: A German Experience. Studies and Evaluation Papers 11).

    ERIC Educational Resources Information Center

    Treppte, Carmen

    This paper describes the development of Turkish Children and Mothers, a project designed to help 5-year-old preschoolers in the Ruhr Valley of Germany develop linguistic, motor, cognitive, and social abilities. The paper also describes various aspects of the project, including those that relate to maternal involvement, educational facilities, the…

  3. Working Together towards Successful Transition: School to Adult Life = Trabajando juntos hacia una transicion exitosa: De la escuela a la vida adulta.

    ERIC Educational Resources Information Center

    Avoke, Selete

    This publication, in English and Spanish, is intended to assist in inclusion of transition from school to work components in the development of an Individualized Education Program (IEP) for a student with a disability in middle school or high school. The guide begins with definitions of "transitions" and "success" and then offers vignettes of the…

  4. Como sacar el mayor partido a una cancion en la clase de espanol (How to Get the Most Out of a Song in a Spanish Class).

    ERIC Educational Resources Information Center

    Acuna, Beatriz Gomez

    2002-01-01

    Although second language textbooks rarely provide songs or many song-related exercises, music excels at alleviating students' tension, enlivening the atmosphere, and offering teachers opportunities to emphasize pedagogical concepts, whether linguistic or cultural. A series of easy-to-use activities is provided that will work with most songs and is…

  5. An Eclectic Professional Development Proposal for English Language Teachers (Una propuesta ecléctica de formación docente para profesores de inglés)

    ERIC Educational Resources Information Center

    Chaves, Orlando; Guapacha, Maria Eugenia

    2016-01-01

    This article reports a mixed-method research project aimed at improving the practices of public sector English teachers in Cali (Colombia) through a professional development program. At the diagnostic stage surveys, documentary analysis, and a focus group yielded the teachers' profile and professional needs. The action phase measured the program's…

  6. Why Is It "Una Persona" and Not "Un Persona": Influence of Linguistic and Cultural Variables on Conceptual Learning in Second Language Situations.

    ERIC Educational Resources Information Center

    Gonzalez, Virginia; And Others

    A study investigated the interaction of cognitive, cultural, and linguistic factors in second-language concept formation in adults. Specifically, it examined how seven college students in a lower-division intensive Spanish class developed new gender concepts when learning a second language. Course instruction focused on concept construction at…

  7. Building Your Baby's Brain: A Parent's Guide to the First Five Years = Como estimular el cerebro infantil: Una guia para padres de familia.

    ERIC Educational Resources Information Center

    Dodge, Diane Trister; Heroman, Cate

    Noting that all parents can help their baby's brain to grow, this guide, in English- and Spanish-language versions, explores what science has learned about infant brain development and how parents and caregivers can influence cognitive development. Topics covered include: prenatal care, touching your baby, teaching about feelings and self-control,…

  8. Emotions as Learning Enhancers of Foreign Language Learning Motivation (Las emociones como potenciadoras de la motivación en el aprendizaje de una lengua extranjera)

    ERIC Educational Resources Information Center

    Méndez López, Mariza G.; Peña Aguilar, Argelia

    2013-01-01

    The present article reports on a study that explores the effects of the emotional experiences of Mexican language learners on their motivation to learn English. In this qualitative research we present how emotions impact the motivation of university language learners in south Mexico. Results suggest that emotions, both negative and positive,…

  9. Perspectivas sobre las escuelas charter: Una resena para padres de familia (Perspectives on Charter Schools: A Review for Parents). ERIC Digest.

    ERIC Educational Resources Information Center

    Donahoo, Saran

    Recently, charter schools have gained popularity with parents, students, and others as alternatives to public schools, but what are charter schools and what effects are they having? This Spanish-language Digest defines charter schools and clarifies some of the administrative and legal details surrounding such schools. The Digest also lays out some…

  10. La crianza practica de los hijos: una guia paso a paso para formar hijos responsables y hogares felices (Common Sense Parenting: A Practical Approach from Boys Town).

    ERIC Educational Resources Information Center

    Burke, Ray; Herron, Ron

    This workbook is designed to help parents develop a "common sense" approach to child rearing and become more effective parents. Each of the 15 chapters suggests a parenting skill and gives examples for using the skill in a variety of situations. Each chapter also includes exercises designed to help parents put these skills into practice with their

  11. Hacia Adelante: Pathways to College. A Guide for Latino Families [and] Hacia Adelante: Pathways to College. Una Guia Para Familias Latinas.

    ERIC Educational Resources Information Center

    Rodriguez, Rosana; McCollum, Pam; Diaz-Sanchez, Micaela; Romero, Anna Alicia; Montemayor, Aurelio

    This guide provides a family approach to college planning, with the goal of helping Latino students gain college entrance. Part 1 provides basic information about college, including information about how early parents should begin talking with their children about college, how parents can help their children plan for college, ensuring that…

  12. Buenos Hábitos Alimenticios para Una Buena Salud: Evaluation of a Nutrition Education Program to Improve Heart Health and Brain Health in Latinas

    PubMed Central

    Otilingam, Poorni G.; Gatz, Margaret; Tello, Elizabeth; Escobar, Antonio Jose; Goldstein, Aviva; Torres, Mina; Varma, Rohit

    2015-01-01

    Objectives The goal of this research was to evaluate nutrition education targeting Latinas, a group at particular risk of obesity and diabetes, which predict to later life cardiovascular disease and dementia. Methods Culturally tailored, theory-based nutrition education was provided to Mexican origin Latinas aged 48 to 84. The randomized design compared participants in workshops incorporating the connection between dietary fat and brain health, participants in workshops focusing only on dietary fat and heart health, a waitlist control group, and a posttest only control group. Results Among those assigned to either intervention, there was statistically significant gain in health literacy, knowledge about dietary fat, and behaviors to reduce dietary fat compared to waitlist control. There was no difference in outcomes between those given the module about diet and brain health and those not provided that module. Discussion A program to encourage dietary fat modification in Latinas proved feasible and modestly effective. PMID:25231884

  13. Summer Reading Adventure! Tips for Parents of Young Readers = La lectura...Una aventura para el verano: Ideas para padres de ninos que apenas comienzan a leer.

    ERIC Educational Resources Information Center

    Moss, Jeanette

    Over the summer, many children lose ground in the reading skills they are building at school. Weave reading into the family's summer, and children will go back to school refreshed, excited, and ready to pick up where he or she left off. Advice for parents and caregivers includes: seek out books and reading materials that tie into children's summer…

  14. Formulación matemática del frente de onda de una fuente luminosa según el método modal

    NASA Astrophysics Data System (ADS)

    Villarreal, M. L.; Starck, M.; Recabarren, P.

    The modeling of a wave front sensor luminic signal; using the modal methode of Zernike polinomials; is described. The code was developed with Matlab; and the acquisition is based in a Field Programmable Gate Array device; as part of the initial stage of an Adaptive Optic system development. FULL TEXT IN SPANISH

  15. La Red Regional Replad: Una Estrategia Innovadora para la Capacitacion de Administradores Educacionales (The Regional Network Replad: An Innovative Strategy for the Training and Preparation of Educational Administrators).

    ERIC Educational Resources Information Center

    Jimenez Espinoza, Jorge

    This document presents an overview, analysis, and historical assessment of the Major Project for Education in Latin America and the Caribbean. Conferences, regional meetings, and outcomes from the inception of the project in 1979 are described. This project stresses the establishment of a regional network for exchange of information, experiences,…

  16. Conversacion sobre "Tres tristes tigres". Una entrevista de Rita Guibert (A Conversation about "Three Sad Tigers". An Interview with Rita Guibert)

    ERIC Educational Resources Information Center

    Cabrera Infante, Guillermo

    1971-01-01

    Interview took place in London, England, on October 5, 1970 between Cuban writer Guillermo Cabrera Infante and journalist Rita Guibert. Special issue dedicated to contemporary Spanish American literature. (DS)

  17. Realidades Suburbanas: Latinos en el Condado de Dakota. Una Investigacion Dirigida por HACER = Suburban Realities: Latinos in Dakota County. A Study Conducted by HACER.

    ERIC Educational Resources Information Center

    HACER: Hispanic Advocacy and Community Empowerment through Research, Minneapolis, MN.

    A research project was conducted between April and December of 1998 to learn about the experiences of the sizable numbers of Latinos who live in Dakota County (Minnesota). This diverse group was studied through examining existing demographic information, conducting interviews with 45 Latino and Anglo individuals, and conducting several focus…

  18. ""Una Persona Derechita" (Staying Right in the Mind)": Perceptions of Spanish-Speaking Mexican American Older Adults in South Texas "Colonias"

    ERIC Educational Resources Information Center

    Sharkey, Joseph R.; Sharf, Barbara F.; St. John, Julie A.

    2009-01-01

    Purpose: This study describes the perceptions of brain health among older Spanish-speaking Mexican Americans who reside in colonia areas of the Lower Rio Grande Valley of Texas. Design and Methods: In 2007, 33 Mexican American older adults (9 men and 24 women) were recruited by "promotoras" (community health workers) from clusters of "colonias" in…

  19. Resultados de una encuesta sobre posibles reformas ortograficas en el espanol del siglo XX (Results of a Survey Concerning Possible Orthographic Reforms in Twentieth Century Spanish)

    ERIC Educational Resources Information Center

    Varela Cuellar, Beatriz

    1976-01-01

    This article presents the results of a questionnaire sent to Spanish teachers regarding possible orthographic reforms in Spanish. Changes considered included elimination of certain letters and representation of each phoneme by only one letter. Responses to each question are classified and explained. (Text is in Spanish.) (CHK)

  20. Parental Involvement and Participation in Bilingual Education: A Guide. (El Involucramiento y la Participacion de los Padres en la Educacion Bilingue: Una Guia.)

    ERIC Educational Resources Information Center

    Chavez, Eliverio

    This is a bilingual guide to parental involvement and participation in bilingual education programs funded under Title VII and other Federal acts. The guide also outlines activities through which parents and the community may become involved in education. Various levels of participation are discussed along with impediments to participation. The…

  1. Hacia Una Pedagogia de Solucion de Problemas en La Educacion Ambiental. Serie Educacion Ambiental 15 (Pedagogy of Solutions and Problems in Environmental Education. Environmental Education Series 15.

    ERIC Educational Resources Information Center

    United Nations Educational, Scientific, and Cultural Organization, Santiago (Chile). Regional Office for Education in Latin America and the Caribbean.

    This document discusses the teaching of problem solving in environmental education. From an interdisciplinary viewpoint, this study describes some strategies for teaching that can favor the practice of educational activities oriented toward solving the concrete problems of the surrounding environment. The volume is divided into seven chapters. The…

  2. Logo and Von Neumann Ideas [and] Towards a Humanistic Use of Computers in Education = Hacia una insercion humanista de las computadoras en la educacion.

    ERIC Educational Resources Information Center

    Reggini, Horacio C.

    The first article, "LOGO and von Neumann Ideas," deals with the creation of new procedures based on procedures defined and stored in memory as LOGO lists of lists. This representation, which enables LOGO procedures to construct, modify, and run other LOGO procedures, is compared with basic computer concepts first formulated by John von Neumann.…

  3. Steppin' On Up: A Post-Secondary Guide for Migrant Students = Tomando Accion: Una Guia para los Estudiantes Migrantes Sobre Que Hacer Despues de la Escuela Secundaria.

    ERIC Educational Resources Information Center

    Western Stream Migrant Education Program Coordination Center, Portland, OR.

    This bilingual guide (English and Spanish) provides information for migrant students on postsecondary education. The guide includes information on: (1) career planning, involving self-exploration, occupational exploration, and strategies for reaching career objectives; (2) planning for postsecondary education during high school, including a…

  4. La Marimba y el joven Pluma de Quetzal: una leyenda chiapaneca. (The Marimba and the Young Man, Pluma de Quetzal: A Chiapaneca Legend.)

    ERIC Educational Resources Information Center

    Marquez, Jerry

    The illustrated book is about the legend of Pluma de Quetzal and the marimba. The story, which takes place in the Mexican state of Chiapas, tells how the woodcutters who lived in the area would sit around the fire talking and singing every night. Sung by tired voices, their songs had no happy music. Instead of happiness and hope, they expressed

  5. Como evalvar la actuacion del profesor en una clase de segundo idioma (How to Evaluate a Teacher in a Second Language Classroom).

    ERIC Educational Resources Information Center

    Galvez de Bracamonte, Teresa

    This guide in Spanish provides performance criteria for evaluating the foreign language teacher. It provides an outline for analyzing the teacher's actions and teaching methods in the classroom. Through the evaluation by an outsider, the teacher can learn his or her faults in the views of others and can improve on them. The aspects to be analyzed…

  6. Sistemas Eólicos Pequeños para Generación de Electricidad: Una guia para consumidores en Nuevo México

    SciTech Connect

    Not Available

    2005-10-01

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

  7. Estudio sociolinguistico de una variante sintactica el fenomeno "dequeismo" en el espanol canario (Sociolinguistic Study of a Syntactic Variant: The "Dequeismo" Phenomenon in Canary Islands Spanish).

    ERIC Educational Resources Information Center

    Serrano, Maria Jose

    1998-01-01

    The dequeismo phenomenon is occurring more frequently in spoken Spanish in both Spain and in Latin America. Introduction of the preposition "de" before "que" in nominal complements exploits one recourse in Spanish, namely the deictic capacity of prepositional "de" as a marker or introducer of the speaker's expressions, opinions, or thoughts. This…

  8. La crianza practica de los hijos: una guia paso a paso para formar hijos responsables y hogares felices (Common Sense Parenting: A Practical Approach from Boys Town).

    ERIC Educational Resources Information Center

    Burke, Ray; Herron, Ron

    This workbook is designed to help parents develop a "common sense" approach to child rearing and become more effective parents. Each of the 15 chapters suggests a parenting skill and gives examples for using the skill in a variety of situations. Each chapter also includes exercises designed to help parents put these skills into practice with their…

  9. Screenwriting: A Strategy for the Improvement of Writing Instructional Practices (La escritura de guiones: una estrategia para mejorar las prácticas instruccionales de escritura)

    ERIC Educational Resources Information Center

    Amado, Hernán

    2010-01-01

    This article presents a pedagogical experience that addresses the use of an instructional strategy called screenwriting aimed at improving the teaching of writing in an educational context. This pedagogical intervention took place in a private English language school, where three adult students willingly participated to create their own short…

  10. Un Segundo Idioma en el Aula: Nos Estamos Perdiendo una Oportunidad? = A Second Language in the Classroom: Are We Missing the Boat?

    ERIC Educational Resources Information Center

    Selman, Ruth Corey

    2007-01-01

    In recent years there has been greater emphasis placed on second language acquisition in schools. To be prepared for life in the 21st century, to function within an increasingly interdependent world society, to be free from the petty biases that hinder understanding and from the larger hatreds that lead to confrontation, children will need to…

  11. Estudio sociolinguistico de una variante sintactica el fenomeno "dequeismo" en el espanol canario (Sociolinguistic Study of a Syntactic Variant: The "Dequeismo" Phenomenon in Canary Islands Spanish).

    ERIC Educational Resources Information Center

    Serrano, Maria Jose

    1998-01-01

    The dequeismo phenomenon is occurring more frequently in spoken Spanish in both Spain and in Latin America. Introduction of the preposition "de" before "que" in nominal complements exploits one recourse in Spanish, namely the deictic capacity of prepositional "de" as a marker or introducer of the speaker's expressions, opinions, or thoughts. This

  12. La Marimba y el joven Pluma de Quetzal: una leyenda chiapaneca. (The Marimba and the Young Man, Pluma de Quetzal: A Chiapaneca Legend.)

    ERIC Educational Resources Information Center

    Marquez, Jerry

    The illustrated book is about the legend of Pluma de Quetzal and the marimba. The story, which takes place in the Mexican state of Chiapas, tells how the woodcutters who lived in the area would sit around the fire talking and singing every night. Sung by tired voices, their songs had no happy music. Instead of happiness and hope, they expressed…

  13. Ideas, Creencias, Actitudes. Primer Modulo de una Serie para Maestros de Escuela Elemental (Ideas, Beliefs, Attitudes. First Module of a Series for Elementary Teachers).

    ERIC Educational Resources Information Center

    Molina, Carmen Eneida, Ed.; And Others

    This guide for teachers, in English and Spanish, examines the role of stereotypes within the context of contemporary beliefs, ideas, and attitudes. A pre-test and post-test are included to measure the user's awareness of stereotypes. Object lessons cover the following topics: (1) definition of stereotypes; (2) racial and ethnic stereotypes; (3)…

  14. Previniendo el Uso de Drogas entre Ninos y Adolescentes: Una Guia Basada en Investigaciones (Preventing Drug Use among Children and Adolescents: A Research-Based Guide).

    ERIC Educational Resources Information Center

    Sloboda, Zili; David, Susan L.

    This question and answer guide provides an overview of the research on the origins and pathways of drug abuse, the basic principles derived from effective drug abuse prevention research, and the application of research results to the prevention of drug use among young people. The basic principles derived from drug abuse prevention research are…

  15. Estudio de los Esquemas Conceptuales y de los Perfiles de Unos Alumnos de Segundo de Bup en Relacion con el Concepto de Pendiente de Una Recta.

    ERIC Educational Resources Information Center

    Gimenez, Carmen Azcarate

    1992-01-01

    Presents a study to determine students' concept of slope carried out in three classes of the second form before introducing the notion of derivative. Discusses the meaning of conceptual framework and reviews literature on slope. Analyzes student responses to a questionnaire for mathematical content and expression and interprets the results. (MDH)

  16. IDEA: !"Vamos a Conocer Espana!: Una Guia Cultural Basada en Imagenes" (Let's Become Acquainted with Spain!: A Basic Cultural Guide in Pictures).

    ERIC Educational Resources Information Center

    Inestrillas, Mar

    1997-01-01

    Presents a collection of pictures presenting a visual array of the geographic features, customs, art, dress, and traditions of the Spanish culture on the European continent that are intended for classroom use. (Author/CK)

  17. Work and Family in the United States: A Policy Initiative. A Report of the Family Policy Panel of the Economic Policy Council of UNA-USA.

    ERIC Educational Resources Information Center

    United Nations Association of the United States of America, New York, NY.

    As part of its world employment project, the Economic Policy Council of the United Nations Association of the United States formed the family policy panel to further examine the extent of ongoing changes affecting the family, the workplace, and the economy. In its work, the family policy panel concentrated on five issues considered central to the…

  18. Una Introduccion a los Jovenes con Discapacidades: Bibliografia Anotada. Revisiones de CYDLINE (An Introduction to Youth with Disabilities: Annotated Bibliography. CYDINE Reviews).

    ERIC Educational Resources Information Center

    Minnesota Univ., Minneapolis. National Center for Youth with Disabilities.

    This Spanish-language annotated bibliography describes English-language resources covering a wide range of issues related to disabled youth and their families. The 38 bibliographic citations date from 1980 to 1989 and are grouped into the following categories: psychosocial issues, health issues, educational issues, and community living.…

  19. Arrecifes de Coral: Una Coleccion de Actividades en Espanol para Estudiantes de Escuela Intermedia (Coral Reefs: A Spanish Compilation of Activities for Middle School Students).

    ERIC Educational Resources Information Center

    Walker, Sharon H.; Newton, R. Amanda; Ortiz, Alida

    This activity book for middle school students on coral reefs is divided into 10 sections. Section 1 is the introduction. Section 2 describes what coral reefs are while section 3 describes how coral reefs reproduce and grow. Section 4 describes where coral reefs are found, and section 5 describes life on a coral reef. Section 6 describes the…

  20. Experiencias y repercusión de una formación en ética de investigación

    PubMed Central

    Rupaya, Carmen Rosa García

    2012-01-01

    El presente artículo tiene como propósito describir los logros y repercusiones de la capacitación en ética de la investigación que brinda el Centro Interdisciplinario de Estudios en Bioética de la Universidad de Chile, sirviendo de estímulo, motivación y orientación a profesionales que requieren conocer y aplicar las normas y el raciocinio conducente a la deliberación de los problemas en esta disciplina. Asimismo, describe cómo este conocimiento genera un efecto multiplicador en aspectos tales como la participación en un comité de ética de la investigación (CEI), organización de cursos y creación y desarrollo de líneas de investigación, que repercuten en publicaciones realizadas con estudiantes de posgrado. Relata además los contenidos y estrategias didácticas que pueden ser empleados en cursos de ética y bioética para estudiantes de estomatología y concluye mencionando la aplicación práctica de esta capacitación en los ámbitos docente, institucional y de investigación. PMID:24482556

  1. Factores predictores de inicio y cesación de tabaquismo en una cohorte de mujeres chilenas con 5,5 años de seguimiento

    PubMed Central

    Puschel, Klaus; Thompson, Beti; Olcay, Fabiola; Frreccio, Catterina

    2014-01-01

    Background Chilean women have one of the highest smoking prevalence in the world. Aim To estimate the main factors associated with smoking initiation and quitting among a cohort of adult women living in a low socioeconomic status area of Santiago, Chile. Material and methods A random population-based sample of 1,100 women, 18 years and older, were selected from a community located in the South East area of Santiago. Sociodemographic, as well as smoking, beliefs, behaviors, stages of change and nicotine addiction level were recorded during a personal interview. After an average follow-up period of 5.5 years, women were re-evaluated. Results Seventy-three percent of women completed the study. At baseline, 39% of women were smokers. At the end of the study, there was an absolute smoking rate reduction of 7.1% (p<0.001). The main variables associated with smoking initiation were younger age (Odds ratio (OR): 1.08, 95% confidence intervals (CI): 1.05–1.12), higher education level (OR: 1.2, 95% CI: 1.07–1.35), and having fewer children (OR: 1.3 95% CI: 1.01–1.66). Factors related with quitting were younger age of onset (OR: 1.06 95% CI: 1.02–1.1), higher level of nicotine dependence (OR: 4.22, 95% CI: 1.74–10.27), and higher perception of smoking addiction (OR: 4.34, 95% CI: 2–9.09). Stage of change was associated with smoking cessation but its effect was diluted after adjusting for the level of nicotine addiction. Conclusions Sociodemographic and family factors were the main variables related with initiation, whereas age of onset, belief of addiction, and nicotine dependence were the main factors related with cessation. Women with a high motivation for quitting should be evaluated for nicotine addiction level to define the best strategy for intervention (Rev Méd Chile 2009; 137: 1001–9). PMID:19915762

  2. Estudio de una "supercáscara" de hidrógeno neutro galáctica centrada en (l; b) = (305°; +4°)

    NASA Astrophysics Data System (ADS)

    Corti, M. A.; Arnal, E. M.

    As part of a research program aiming at detecting neutral hydrogen (HI) shells in the interstellar medium of the Milky Way, in this paper we ex- amined the genesis, physical characteristics and dynamics of a HI structure centered at (l, b) = (305 , +4 ) whose baricentral radial velocity is -25 km s-1 (LSR). The HI survey carried out at the IAR was used in this study. FULL TEXT IN SPANISH

  3. Estudio del sistema de cúmulos globulares de la galaxia lenticular NGC6861: en busca de evidencias de una fusión.

    NASA Astrophysics Data System (ADS)

    Escudero, C. G.; Faifer, F. R.; Bassino, L. P.; Calderón, J. P.; Caso, J. P.

    We present a photometric study of the globular cluster system (GCS); associated to the lenticular galaxy NGC6861. It is based on GEMINI/GMOS images in the filters g'; r'; i' of three fields; one of them centered on the galaxy. Studying the colour-magnitude diagram of the system; we detect the presence of at least two populations of GCs (``blue'' and ``red'') and the presence of the phenomenon known as ``blue-tilt''. However; analyzing the colour distribution we infer the existence of a third population with intermediate colours which could be interpreted as evidence of a past interaction or fusion event. FULL TEXT IN SPANISH

  4. Alianza para el Aprendizaje: Una guia de actividades educativas para familias (Alliance for Learning: A Guide of Educational Activities for Families).

    ERIC Educational Resources Information Center

    Carr, Phil

    This Spanish-language publication condenses the information in the Alliance for Learning series. The publication is intended principally for families with preschool or primary grade children, although the material can be used with older children. The sections of the publication address various themes and present activities that parents can do with…

  5. Los Rizos y el Beisbol. Septimo Modulo de una Serie para Maestros de Escuela Elemental. (Curls and Baseball. Seventh Module of a Series for Elementary School Teachers).

    ERIC Educational Resources Information Center

    Molina, Carmen Eneida, Ed.; And Others

    This guide for teachers, in English and Spanish, examines how assigned sex roles affect grade school girls in competitive sports, simple games, pastimes, and other extracurricular activities. A pre-test and post-test are included to measure the user's awareness of sexual stereotypes. Five object lessons cover the following topics: (1) myths that

  6. Antioxidant, Metal Chelating, Anti-glucosidase Activities and Phytochemical Analysis of Selected Tropical Medicinal Plants.

    PubMed

    Wong, Fai-Chu; Yong, Ann-Li; Ting, Evon Peir-Shan; Khoo, Sim-Chyi; Ong, Hean-Chooi; Chai, Tsun-Thai

    2014-01-01

    The purpose of this investigation was to determine the antioxidant potentials and anti-glucosidase activities of six tropical medicinal plants. The levels of phenolic constituents in these medicinal plants were also quantified and compared. Antioxidation potentials were determined colorimetrically for scavenging activities against DPPH and NO radicals. Metal chelating assay was based on the measurement of iron-ferrozine absorbance at 562 nm. Anti-diabetic potentials were measured by using α-glucosidase as target enzyme. Medicinal plants' total phenolic, total flavonoid and hydroxycinnamic acid contents were determined using spectrophotometric methods, by comparison to standard plots prepared using gallic acid, quercetin and caffeic acid standards, respectively. Radical scavenging and metal chelating activities were detected in all medicinal plants, in concentration-dependent manners. Among the six plants tested, C. nutans, C. formosana and H. diffusa were found to possess α-glucosidase inhibitory activities. Spectrophotometric analysis indicated that the total phenolic, total flavonoid and hydroxycinnamic acid contents ranged from 12.13-21.39 mg GAE per g of dry sample, 1.83-9.86 mg QE per g of dry sample, and 0.91-2.74 mg CAE per g of dry sample, respectively. Our results suggested that C. nutans and C. formosana could potentially be used for the isolation of potent antioxidants and anti-diabetic compounds. To the best of our knowledge, this study represents the first time that C. nutans (Acanthaceae family) was reported in literature with glucosidase inhibition activity. PMID:25587331

  7. Mechanisms of cardiovascular activity of Andrographis paniculata in the anaesthetized rat.

    PubMed

    Zhang, C Y; Tan, B K

    1997-04-01

    The cardiovascular activities of crude water extract (WE) of Andrographis paniculata (Burm. f.) Nees (Acanthaceae), its three semi-purified ethyl acetate (FA), n-butanol (FB) and aqueous (FC) fractions, as well as andrographolide, a major plant constituent, were elucidated in anaesthetized Sprague-Dawley (SD) rats for the very first time. FA and andrographolide, which possesses multiple pharmacological activities, elicited no drop in mean arterial blood pressure (MAP), while WE, FB and FC produced a significant fall in MAP in a dose-dependent manner without significant decrease in heart rate. The ED50 values for WE, FB and FC were 11.4, 5.0 and 8.6 mg/kg-respectively. These suggested that the hypotensive substance(s) of the crude water extract was concentrated in FB. Pharmacological antagonist studies were consequently only tested in FB (5 mg/kg). The hypotensive action of FB was not mediated through effects on the beta-adrenoceptor, muscarinic cholinergic receptor and angiotensin-converting enzyme, for it was not affected by propranolol, atropine and captapril, respectively. However, it seems to work via alpha-adrenoceptors, autonomic ganglion and histaminergic receptors, since the hypotensive effect of FB was negated or attenuated in the presence of phentolamine, hexamethonium as well as pyrilamine and cimetidine. PMID:9174969

  8. Capitate glandular trichomes of Paragutzlaffia henryi harbor new phytotoxic labdane diterpenoids.

    PubMed

    Wang, Ying; Luo, Shi-Hong; Hua, Juan; Liu, Yan; Jing, Shu-Xi; Li, Xiao-Nian; Li, Sheng-Hong

    2015-11-18

    The morphology and chemical profile of the capitate glandular trichomes (CGTs) of Paragutzlaffia henryi (Acanthaceae) were investigated. Four new labdane diterpenoids named paraguhenryisins A-D (1-4), together with the known physacoztomatin (5), were localized to the CGTs using laser microdissection coupled with cryogenic (1)H NMR and HPLC analyses and were traced and isolated from the CGT extract of inflorescences. Their structures were determined by spectroscopic methods and single-crystal X-ray diffraction. Bioassays indicated significant inhibitory effect for these diterpenoids on Arabidopsis thaliana seed germination and seedling root elongation. The most potent inhibitor, paraguhenryisin C (3), was interestingly detected in both the rhizosphere soil and water rinsed inflorescences extract of P. henryi but not the roots, with average contents in the rhizosphere soil relevant to its phytotoxic EC50 values. These results suggested that phytotoxic labdane diterpenoids in the CGTs might be released into the environment as a defensive measure for P. henryi against other competitive plants. PMID:26513276

  9. The efficient flight of Ruellia ciliatiflora seeds

    NASA Astrophysics Data System (ADS)

    Whitaker, Dwight; Marsh, Franklin; Chen, Peter; Vejar, David; Babb, Patrick; Castillo, Josue; Cordero, Sabrina; Lumban-Gaol, Maharani; Mora, Irlanda; Partida, Tania; Pineda, Julian; Rodriguez, Aaron

    2014-11-01

    The seeds of Ruellia ciliatiflora are small disks measuring approximately 3 mm in diameter and 0.3 mm in height, which are launched from exploding fruits at speeds exceeding 10 m/s. The seeds fly with backspin such that the axis of symmetry is parallel to the ground. With rotation rates that exceed 1 kHz they keep an aerodynamic profile and move through the air with a extremely low drag. Using high-speed video we have learned that the drag coefficients for these flying seeds can measure less than 0.01 for those launched with the least wobble. To understand the role of seed morphology and rotation rate on the flight of the seeds, we will also present work using 3D printed models of the seeds for studies in wind tunnels. Three-dimensional models are created by photographing seeds from many angles and inferring a shape using commercial software, which also creates a printable model. These studies should help guide work that compares explosions from fruits within the Acanthaceae family to which R. ciliatiflora belongs. This family consists of over 2000 species with exploding fruit with diverse habitats and morphologies.

  10. Nain-e Havandi Andrographis paniculata present yesterday, absent today: a plenary review on underutilized herb of Iran's pharmaceutical plants.

    PubMed

    Valdiani, Alireza; Kadir, Mihdzar Abdul; Tan, Soon Guan; Talei, Daryush; Abdullah, Mohd Puad; Nikzad, Sonia

    2012-05-01

    Nain-e Havandi (Andrographis paniculata Nees.) (AP) is an annual herbaceous plant belonging to the family Acanthacea. Only a few species of Andrographis genus out of 28 are medicinally concerned of which AP is the most important. Knowledge about the arrival of AP to Iran is extremely lacking but most probably it has been imported from India. However, evidence implies the familiarity of Iran's folkloric medicine with this plant, but it has been disappeared from contemporary medicine for unknown reasons. Presence of active ingredients from diterpenoids group such as andrographolide, neoandrographolide and 14-deoxy-11,12-didehydroandrographolide has given incredible unique medicinal properties to the plant. Traditionally, Nain-e Havandi has been used in the role of a non-farm plant as a remedy for skin problems, flu, respiratory disease, and snakebite in East and Southeast Asia for centuries. Recently, it has been utilized as a treatment for HIV, hepatitis, diabetes, cancer and kidney disorders. Intensive cultivation of the herb started only in the past decade in countries such as China, India, Thailand, Indonesia, West Indies, Mauritius and to some extent, in Malaysia. Availability of different ecological zones in Iran complies with reestablishment of AP in tropical and temperate regions of the country. This is killing two birds with one stone, supporting the conservational and economic aspects. PMID:22198549

  11. Clinacanthus nutans: A review of the medicinal uses, pharmacology and phytochemistry.

    PubMed

    Alam, Ariful; Ferdosh, Sahena; Ghafoor, Kashif; Hakim, Abdul; Juraimi, Abdul Shukor; Khatib, Alfi; Sarker, Zaidul I

    2016-04-01

    Clinacanthus nutans Lindau is known as snake grass belonging to the Acanthaceae family. This plant has diverse and potential medicinal uses in traditional herbal medicine for treating skin rashes, insects and snake bites, lesions caused by herpes simplex virus, diabetes, and gout in Malaysia, Indonesia, Thailand and China. Phytochemical investigations documented the varied contents of bioactive compounds from this plant namely flavonoids, glycosides, glycoglycerolipids, cerebrosides and monoacylmonogalatosylglycerol. The pharmacological experiment proved that various types of extracts and pure compounds from this species exhibited a broad range of biological properties such as anti-inflammatory, antiviral, antioxidant, and anti-diabetic activities. The findings of toxicity study showed that extracts from this plant did not show any toxicity thus it can be used as strong therapeutic agents for specific diseased conditions. However, further experiments on chemical components and their mode of action showing biological activities are required to elucidate the complete phytochemical profile and assess to confirm their suitability for future drugs. This review summarizes the medicinal uses, phytochemistry and pharmacology of this plant in order to explore its therapeutic potential and gaps necessitating for prospected research work. PMID:27086161

  12. Essential oil constituents and biological activities of Peristrophe bicalyculata and Borreria verticillata.

    PubMed

    Ogunwande, Isiaka A; Walker, Tameka M; Bansal, Anita; Setzer, William N; Essien, Emmanuel E

    2010-11-01

    Peristrophe bicalyculata (Retz) Nees (Acanthaceae) or 'The Goddess of Mercy' and Borreria verticillata (L.) G.F.W. Mey., (Rubiaceae), or 'Irawo-Ile' (Yoruba, South-west, Nigeria), are annual herbs, which are poorly exploited. The volatile oils obtained by hydrodistillation in an all glass Clevenger-type apparatus from the plant samples have been investigated by gas chromatography-mass spectrometry (GC-MS). With respect to the oil of P. bicalyculata, beta-caryophyllene (33.9%), alpha-zingiberene (10.4%), germacrene D and globulol (5.0%) were the compounds occurring in abundance. The oil of B. verticillata had an abundance of phytol (56.3%) and 1, 8-cineole (20.4%), with sizeable proportions of alpha-pinene (7.1%) and p-cymene (4.0%). In addition, the volatile oils displayed promising in-vitro antimicrobial activity against the tested micro-organisms, (MIC 12.5-22.3 microg/mL), while only the oil of P. bicalyculata displayed in-vitro cytotoxicity to MCF-7 (human breast tumor) and MDA-MB-468 (human breast tumor) cells. The present investigation may be the first of its kind for the evaluation of the volatile oil constituents of the studied plants. PMID:21213989

  13. Rhinacanthus nasutus protects cultured neuronal cells against hypoxia induced cell death.

    PubMed

    Brimson, James M; Tencomnao, Tewin

    2011-01-01

    Rhinacanthus nasutus (L.) Kurz (Acanthaceae) is an herb native to Thailand and Southeast Asia, known for its antioxidant properties. Hypoxia leads to an increase in reactive oxygen species in cells and is a leading cause of neuronal damage. Cell death caused by hypoxia has been linked with a number of neurodegenerative diseases including some forms of dementia and stroke, as well as the build up of reactive oxygen species which can lead to diseases such as Huntington's disease, Parkinson's disease and Alzeheimer's disease. In this study we used an airtight culture container and the Mitsubishi Gas Company anaeropack along with the MTT assay, LDH assay and the trypan blue exlusion assay to show that 1 and 10 µg mL⁻¹ root extract of R. nasutus is able to significantly prevent the death of HT-22 cells subjected to hypoxic conditions, and 0.1 to 10 µg mL⁻¹ had no toxic effect on HT-22 under normal conditions, whereas 100 µg mL⁻¹ reduced HT-22 cell proliferation. We also used H₂DCFDA staining to show R. nasutus can reduce reactive oxygen species production in HT-22 cells. PMID:21792150

  14. Isolation, characterisation and biological evaluation of a phenoxazine, a natural dyestuff isolated from leaves of Peristrophe bivalvis.

    PubMed

    Thuy, Trinh Thi; Huong, Nguyen Thi Thanh; Nhung, Le Thi Hong; Ninh, Pham Thi; Delfino, Domenico V; Van Sung, Tran

    2013-04-01

    Peristrophe bivalvis (L.) Merr. (Acanthaceae) is a wild growing and cultivated plant used for dyeing of foods by the ethnic minorities of Vietnam. The major component of the colour aqueous extract (CAE) of its leaves was identified as peristrophine by spectral analysis, especially the 2D NMR spectra (HSQC, HMBC and NOESY). Considering the widespread utilisation of the decoction of this plant for food dyeing, we evaluated the acute oral toxicity of the CAE. Based on the results in an acute toxicity study in mice, the LD50 value of the CAE was determined as 9100 ± 290 mg kg(-1) body weight. Additionally, in vitro cytotoxic assay showed an inhibition of peristrophine against Hepatocellular carcinoma (HepG2, IC503.90 µg mL(-1)). CAE and peristrophine (1) have also been tested for their ability to affect the cell number of the OCI acute myeloid leukaemia cell line. CAE and peristrophine significantly decreased the OCI cell number at different concentrations and times of treatment. PMID:22712581

  15. Antimicrobial, antioxidant, and cytotoxic properties of vasicine acetate synthesized from vasicine isolated from Adhatoda vasica L.

    PubMed

    Duraipandiyan, V; Al-Dhabi, N A; Balachandran, C; Ignacimuthu, S; Sankar, C; Balakrishna, K

    2015-01-01

    Adhatoda vasica (L.) (Acanthaceae) is used in the indigenous system of medicine in India. The alkaloid Vasicine was isolated from ethanolic extract of the leaves of A. vasica using column chromatography. Vasicine acetate was obtained by acetylation of Vasicine. Vasicine acetate exhibited good zone of inhibition against bacteria: 10 mm against E. aerogenes, 10 mm against S. epidermidis, and 10 mm against P. aeruginosa. Vasicine acetate showed minimum inhibitory concentration values against bacteria: M. luteus (125 μg/mL), E. aerogenes (125 μg/mL), S. epidermidis (125 μg/mL), and P. aeruginosa (125 μg/mL). The radical scavenging activity of Vasicine acetate was the maximum at 1000 μg/mL (66.15%). The compound showed prominent cytotoxic activity in vitro against A549 lung adenocarcinoma cancer cell line. Quantification of Vasicine and Vasicine acetate by HPLC-DAD analysis showed their contents to be 0.2293% and 0.0156%, respectively, on dry weight basis of the leaves. Vasicine acetate could be probed further in drug discovery programme. PMID:25632399

  16. Evaluation of microscopic structure of Justicia wynaadensis and the stability of its color extracted by using conventional and microwave extraction method.

    PubMed

    Patil, Nital; Nigudkar, Manjusha; Sane, Ramesh; Ajitkumar, B S; Datar, Ajit

    2015-10-01

    Justicia wynaadensis locally known as Moddu Soppu belongs to the family Acanthaceae. The aqueous bluish purple color extracted from the leaves and stems of Justicia is used in the preparation of a sweet dish by the natives of Kodagu district, Karanataka, India, exclusively during the monsoons. This traditional practice is believed to keep the people healthy throughout the year. Owing to its potential to be used as a natural colorant there is a strong need to develop efficient extraction method for maximum yield of colorant and preliminary scientific study of stability. Microscopy was carried out to find out the location of purple color in both leaves and stem and to study the anatomical details. An optimized microwave extraction method for extraction of colorant from Justicia has been developed. The microwave oven extraction yield of colorant is 9.41 % (±0.8598) under the optimized conditions of extraction time 30 min., extraction temperature 150 °C and ratio of liquid to solid 30 ml/g. The study demonstrated that the purple extract of the plant was stable against pH range 6.0-8.0, low temperature (4 °C), high temperature (≥50 °C) and sensitive to light. Thus these observations recommend the use of J. wynaadensis extract as a food colorant in neutral or slightly alkaline products (bakery, milk, egg etc.) and could be the potential source for the food colorant market. PMID:26396390

  17. Antimicrobial, Antioxidant, and Cytotoxic Properties of Vasicine Acetate Synthesized from Vasicine Isolated from Adhatoda vasica L.

    PubMed Central

    Duraipandiyan, V.; Al-Dhabi, N. A.; Balachandran, C.; Ignacimuthu, S.; Sankar, C.; Balakrishna, K.

    2015-01-01

    Adhatoda vasica (L.) (Acanthaceae) is used in the indigenous system of medicine in India. The alkaloid Vasicine was isolated from ethanolic extract of the leaves of A. vasica using column chromatography. Vasicine acetate was obtained by acetylation of Vasicine. Vasicine acetate exhibited good zone of inhibition against bacteria: 10 mm against E. aerogenes, 10 mm against S. epidermidis, and 10 mm against P. aeruginosa. Vasicine acetate showed minimum inhibitory concentration values against bacteria: M. luteus (125 μg/mL), E. aerogenes (125 μg/mL), S. epidermidis (125 μg/mL), and P. aeruginosa (125 μg/mL). The radical scavenging activity of Vasicine acetate was the maximum at 1000 μg/mL (66.15%). The compound showed prominent cytotoxic activity in vitro against A549 lung adenocarcinoma cancer cell line. Quantification of Vasicine and Vasicine acetate by HPLC-DAD analysis showed their contents to be 0.2293% and 0.0156%, respectively, on dry weight basis of the leaves. Vasicine acetate could be probed further in drug discovery programme. PMID:25632399

  18. Harnessing the medicinal properties of Andrographis paniculata for diseases and beyond: a review of its phytochemistry and pharmacology

    PubMed Central

    Okhuarobo, Agbonlahor; Falodun, Joyce Ehizogie; Erharuyi, Osayemwenre; Imieje, Vincent; Falodun, Abiodun; Langer, Peter

    2014-01-01

    Andrographis paniculata Wall (family Acanthaceae) is one of the most popular medicinal plants used traditionally for the treatment of array of diseases such as cancer, diabetes, high blood pressure, ulcer, leprosy, bronchitis, skin diseases, flatulence, colic, influenza, dysentery, dyspepsia and malaria for centuries in Asia, America and Africa continents. It possesses several photochemical constituents with unique and interesting biological properties. This review describes the past and present state of research on Andrographis paniculata with respect to the medicinal usage, phytochemistry, pharmacological activities, toxicity profile and therapeutic usage, in order to bridge the gap requiring future research opportunities. This review is based on literature study on scientific journals and books from library and electronic sources. Diterpenes, flavonoids, xanthones, noriridoides and other miscellaneous compounds have been isolated from the plant. Extract and pure compounds of the plant have been reported for their anti-microbial, cytotoxicity, anti-protozoan, anti-inflammatory, anti-oxidant, immunostimulant, anti-diabetic, anti-infective, anti-angiogenic, hepato-renal protective, sex hormone/sexual function modulation, liver enzymes modulation insecticidal and toxicity activities. The results of numerous toxicity evaluations of extracts and metabolites isolated from this plant did not show any significant acute toxicity in experimental animals. Detailed and more comprehensive toxicity profile on mammalian tissues and organs is needed in future studies.

  19. Extraction of three bioactive diterpenoids from Andrographis paniculata: effect of the extraction techniques on extract composition and quantification of three andrographolides using high-performance liquid chromatography.

    PubMed

    Kumar, Satyanshu; Dhanani, Tushar; Shah, Sonal

    2014-10-01

    Andrographis paniculata (Burm.f.) wall.ex Nees (Acanthaceae) or Kalmegh is an important medicinal plant finding uses in many Ayurvedic formulations. Diterpenoid compounds andrographolides (APs) are the main bioactive phytochemicals present in leaves and herbage of A. paniculata. The efficiency of supercritical fluid extraction (SFE) using carbon dioxide was compared with the solid-liquid extraction techniques such as solvent extraction, ultrasound-assisted solvent extraction and microwave-assisted solvent extraction with methanol, water and methanol-water as solvents. Also a rapid and validated reverse-phase high-performance liquid chromatography-diode array detection method was developed for the simultaneous determination of the three biologically active compounds, AP, neoandrographolide and andrograpanin, in the extracts of A. paniculata. Under the best SFE conditions tested for diterpenoids, which involved extraction at 60°C and 100 bar, the extractive efficiencies were 132 and 22 µg/g for AP and neoandrographolide, respectively. The modifier percentage significantly affected the extraction efficiency. PMID:24170124

  20. Phytochemical and pharmacological potential of Acanthus ilicifolius.

    PubMed

    Singh, Dharya; Aeri, Vidhu

    2013-01-01

    Acanthus ilicifolius (Acanthaceae) has received considerable attention due to its wide range of secondary metabolites and its traditional usage in Indian and Chinese system of medicine. This plant is reported to be a mangrove. Mangrove survives in the most hostile environment with fluctuating tidal and saline regime. Hence, these plants are considered to be rich sources of steroids, triterpenoids, saponins, flavonoids, alkaloids, and tannins. Present review article is an attempt to cover recent developments in phytochemical and pharmacological potential of drug. Traditionally, the plant has been used for dyspepsia, paralysis, asthsma, headache, rheumatism, and skin diseases. The plant is known as 'Krishnasaireyaka' or 'Karimkurunji', is one of the 9 plants equated to the drug 'Sahachara,' which is used in Ayurvedic medicine for rheumatic complaints. The plant has not been explored to its full potential. The review will be a good reference tool for investigators who wish to work on natural compounds with free radical scavenging activity to combat diseases associated with stress. PMID:23559819

  1. [Annotated list of the plants of the Tortuguero National Park].

    PubMed

    Hurtado-Hernández, Priscilla M; González-Ramírez, José A

    2013-09-01

    The floodplains of Tortuguero, in northeastern Costa Rica, stand as one of the richest plant-species regions in Central America. In this paper, we present the annotated check-list of vascular plants that are present within the rainforest of Tortuguero National Park (TNP), a 26 604h land that protects most of the biological diversity of these plains. Our list resulted from collections made in 2012, as well as the examination of material mantained at the Herbarium of the National Biodiversity Institute of Costa Rica, INBio (ATTA Database) and in the TROPICOS database. A total of 732 vascular plant species included in 413 genera are known to the Park. Two of these species have limited distributions and are endemic to Costa Rica: Pseuderanthemum pittieri (Acanthaceae) and Paullinia austin-smithii (Sapindaceae). Ninety species have known ethnobotanical uses. The high diversity in plant species reported here for the forest environments of Tortuguero contrasts with the low species diversity previously reported in the palm-swamps that characterize the riverine habitats within the Park. PMID:24459756

  2. Analysis of flavone C-glycosides in the leaves of Clinacanthus nutans (Burm. f.) Lindau by HPTLC and HPLC-UV/DAD.

    PubMed

    Chelyn, June Lee; Omar, Maizatul Hasyima; Mohd Yousof, Nor Syaidatul Akmal; Ranggasamy, Ramesh; Wasiman, Mohd Isa; Ismail, Zakiah

    2014-01-01

    Clinacanthus nutans (family Acanthaceae) has been used for the treatment of inflammation and herpes viral infection. Currently, there has not been any report on the qualitative and quantitative determination of the chemical markers in the leaves of C. nutans. The C-glycosidic flavones such as shaftoside, isoorientin, orientin, isovitexin, and vitexin have been found to be major flavonoids in the leaves of this plant. Therefore, we had developed a two-step method using thin-layer chromatography (TLC) and high pressure liquid chromatography (HPLC) for the rapid identification and quantification of the flavones C-glycosides in C. nutans leaves. The TLC separation of the chemical markers was achieved on silica gel 60 plate using ethyl acetate : formic acid : acetic acid : water (100 : 11 : 11 : 27 v/v/v/v) as the mobile phase. HPLC method was optimized and validated for the quantification of shaftoside, orientin, isovitexin, and vitexin and was shown to be linear in concentration range tested (0.4-200 μg/mL, r(2) ≥ 0.996), precise (RSD ≤ 4.54%), and accurate (95-105%). The concentration of shaftoside, orientin, vitexin, and isovitexin in C. nutans leave samples was 2.55-17.43, 0.00-0.86, 0.00-2.01, and 0.00-0.91 mmol/g, respectively. PMID:25405231

  3. Antioxidant, Metal Chelating, Anti-glucosidase Activities and Phytochemical Analysis of Selected Tropical Medicinal Plants

    PubMed Central

    Wong, Fai-Chu; Yong, Ann-Li; Ting, Evon Peir-Shan; Khoo, Sim-Chyi; Ong, Hean-Chooi; Chai, Tsun-Thai

    2014-01-01

    The purpose of this investigation was to determine the antioxidant potentials and anti-glucosidase activities of six tropical medicinal plants. The levels of phenolic constituents in these medicinal plants were also quantified and compared. Antioxidation potentials were determined colorimetrically for scavenging activities against DPPH and NO radicals. Metal chelating assay was based on the measurement of iron-ferrozine absorbance at 562 nm. Anti-diabetic potentials were measured by using α-glucosidase as target enzyme. Medicinal plants’ total phenolic, total flavonoid and hydroxycinnamic acid contents were determined using spectrophotometric methods, by comparison to standard plots prepared using gallic acid, quercetin and caffeic acid standards, respectively. Radical scavenging and metal chelating activities were detected in all medicinal plants, in concentration-dependent manners. Among the six plants tested, C. nutans, C. formosana and H. diffusa were found to possess α-glucosidase inhibitory activities. Spectrophotometric analysis indicated that the total phenolic, total flavonoid and hydroxycinnamic acid contents ranged from 12.13-21.39 mg GAE per g of dry sample, 1.83-9.86 mg QE per g of dry sample, and 0.91-2.74 mg CAE per g of dry sample, respectively. Our results suggested that C. nutans and C. formosana could potentially be used for the isolation of potent antioxidants and anti-diabetic compounds. To the best of our knowledge, this study represents the first time that C. nutans (Acanthaceae family) was reported in literature with glucosidase inhibition activity. PMID:25587331

  4. Molecular evaluation of extracellular activity of medicinal herb Clinacanthus nutans against herpes simplex virus type-2.

    PubMed

    Vachirayonstien, Thaveechai; Promkhatkaew, Duanthanorm; Bunjob, Malee; Chueyprom, Asawachai; Chavalittumrong, Pranee; Sawanpanyalert, Pathom

    2010-02-01

    Clinacanthus nutans (Burm. f.) Lindau (C. nutans), a medicinal herb belonging to the family Acanthaceae, has traditionally been used in herpes simplex virus (HSV) treatment in Thailand. Clinical trials have indicated that topical preparations produced from its extracts were effective in HSV-2 treatment. However, there is no clear evidence of the mechanism of action or a molecular target of C. nutans. In this study, the extracellular activity of C. nutans extracts against HSV-2 infected on HEp-2 cells was investigated in terms of its molecular aspects. HSV-2 was treated with the extracts and adsorped into the HEp-2 cells. After infection, HSV-2 DNA quantities in the infected cells were assessed and compared by the quantitative dot blot hybridisation technique. The results showed that treating the viruses with either less or more highly purified extracts before infection resulted in great reductions of viral infectivity. Further investigation was performed by Western blot analysis to determine the activities of the extracts on the viral proteins. At least eight viral proteins of the infected cell proteins (ICP) and some structural proteins, including 146, 125, 78, 69, 55, 44, 40 and 20 KDa proteins, were depleted and reduced gradually with higher and lower concentrated herb extracts, respectively. These suggest that the C. nutans extracts highly inactivated or inhibited HSV-2 before infection. PMID:20140802

  5. Analysis of Flavone C-Glycosides in the Leaves of Clinacanthus nutans (Burm. f.) Lindau by HPTLC and HPLC-UV/DAD

    PubMed Central

    Chelyn, June Lee; Omar, Maizatul Hasyima; Mohd Yousof, Nor Syaidatul Akmal; Ranggasamy, Ramesh; Wasiman, Mohd Isa; Ismail, Zakiah

    2014-01-01

    Clinacanthus nutans (family Acanthaceae) has been used for the treatment of inflammation and herpes viral infection. Currently, there has not been any report on the qualitative and quantitative determination of the chemical markers in the leaves of C. nutans. The C-glycosidic flavones such as shaftoside, isoorientin, orientin, isovitexin, and vitexin have been found to be major flavonoids in the leaves of this plant. Therefore, we had developed a two-step method using thin-layer chromatography (TLC) and high pressure liquid chromatography (HPLC) for the rapid identification and quantification of the flavones C-glycosides in C. nutans leaves. The TLC separation of the chemical markers was achieved on silica gel 60 plate using ethyl acetate : formic acid : acetic acid : water (100 : 11 : 11 : 27 v/v/v/v) as the mobile phase. HPLC method was optimized and validated for the quantification of shaftoside, orientin, isovitexin, and vitexin and was shown to be linear in concentration range tested (0.4–200 μg/mL, r2 ≥ 0.996), precise (RSD ≤ 4.54%), and accurate (95–105%). The concentration of shaftoside, orientin, vitexin, and isovitexin in C. nutans leave samples was 2.55–17.43, 0.00–0.86, 0.00–2.01, and 0.00–0.91 mmol/g, respectively. PMID:25405231

  6. Anti-Tumor Action, Clinical Biochemistry Profile and Phytochemical Constituents of a Pharmacologically Active Fraction of S. crispus in NMU-Induced Rat Mammary Tumour Model.

    PubMed

    Yaacob, Nik Soriani; Yankuzo, Hassan Muhammad; Devaraj, Sutha; Wong, Jimmy Ka Ming; Lai, Choon-Sheen

    2015-01-01

    Cancer patients seek alternative remedies such as traditional medicinal plants for safe and effective treatment and help overcome the side effects of conventional therapy. Current knowledge indicates that extracts of Strobilanthes crispus of the Acanthaceae family exhibit potent anticancer properties in vitro and are non-toxic in vivo. S. crispus was also reported to be protective against chemical hepatocarcinogenesis. We previously showed that a bioactive fraction of S. crispus leaves also synergized with tamoxifen to cause apoptosis of human breast cancer cell lines without damaging non-malignant epithelial cells. The present study aimed to evaluate the antitumor effect of S. crispus dichloromethane fraction (F3) using N-methyl-N-Nitrosourea (NMU)-induced rat mammary tumor model. Tumor regression was observed in 75% of the rats following 8-week oral administration of F3 with no secondary tumour formation and no signs of anemia or infection. However, no improvement in the liver and renal function profiles was observed. Major constituents of F3 were identified as lutein, 131-hydroxy-132-oxo-pheophytin a, campesterol, stigmasterol, β-sitosterol, pheophytin a and 132-hydroxy-pheophytin a. These compounds however, may not significantly contribute to the antitumor effect of F3. PMID:26000968

  7. Comparative study of the assay of Artemia salina L. and the estimate of the medium lethal dose (LD50 value) in mice, to determine oral acute toxicity of plant extracts.

    PubMed

    Logarto Parra, A; Silva Yhebra, R; Guerra Sardiñas, I; Iglesias Buela, L

    2001-09-01

    Artemia salina L. (Artemiidae), the brine shrimp larva, is an invertebrate used in the alternative test to determine toxicity of chemical and natural products. In this study the Medium Lethal Concentrations (LC50 value) of 20 plant extracts, Aloe vera (L.) Burm. F. (Aloeaceae), Artemisia absinthium L. (Asteraceae); Citrus aurantium L. (Rutaceae); Cymbopogon citratus (DC. Ex Nees) Stapf (Poaceae); Datura stramonium L. (Solanaceae); Justicia pectoralis Jacq. (Acanthaceae); Musa x paradisiaca L. (Musaceae); Ocimum basilicum L.; O. gratissimum L.; O. tenuiflorum L. (Lamiaceae); Pimenta dioica (L.) Merr. (Myrtaceae); Piper auritum Kunth (Piperaceae); Plantago major L. (Plantaginaceae); Plectranthus amboinicus (Lour.) Spreng. (Lamiaceae); Ruta graveolens L. (Rutaceae); Senna alata (L.) Roxb. (Fabaceae); Stachytarpheta jamaicensis (L.) Vahl (Verbenaceae); and Thuja occidentalis L. (Cupressaceae), were determined using Artemia salina L. (Artemiidae), with the objective of relating the results to the LD50 values reported in mice (tested at three concentrations: 10, 100, and 1000 microg/mL, for each extract). We found good correlation between the in vivo and the in vitro tests (r = 0.85 p < 0.05), and this method is a useful tool for predicting oral acute toxicity in plant extracts. PMID:11695884

  8. GENUS RUELLIA: PHARMACOLOGICAL AND PHYTOCHEMICAL IMPORTANCE IN ETHNOPHARMACOLOGY.

    PubMed

    Afzal, Khurram; Uzair, Muhammad; Chaudhary, Bashir Ahmad; Ahmad, Ashfaq; Afzal, Samina; Saadullah, Malik

    2015-01-01

    Ruellia is a genus of flowering plants commonly known as Ruellias or Wild Petunias which belongs to the family Acanthaceae. It contains about 250 genera and 2500 species. Most of these are shrubs, or twining vines; some are epiphytes. Only a few species are distributed in temperate regions. They are distributed in Indonesia and Malaysia, Africa, Brazil, Central America and Pakistan. Some of these are used as medicinal plants. Many species of the genus has antinociceptive, antioxidant, analgesic, antispasmolytic, antiulcer, antidiabetic and anti-inflammatory properties. The phytochemicals constituents: glycosides, alkaloids, flavonoids and triterpenoids are present. The genus has been traditionally claimed to be used for the treatment of flu, asthma, fever, bronchitis, high blood pressure, eczema, and diabetes. The objective of this review article is to summarize all the pharmacological and phytochemical evaluations or investigations to find area of gap and endorse this genus a step towards commercial drug. Hence, further work required is to isolate and characterize the active compounds responsible for these activities in this plant and bring this genus plants to commercial health market to serve community with their potential benefits. PMID:26665388

  9. Modulation of Cox-1, 5-, 12- and 15-Lox by Popular Herbal Remedies Used in Southern Italy Against Psoriasis and Other Skin Diseases

    PubMed Central

    Bader, Ammar; Martini, Francesca; Schinella, Guillermo R; Rios, Jose L; Prieto, Jose M

    2015-01-01

    Acanthus mollis (Acanthaceae), Achillea ligustica, Artemisia arborescens and Inula viscosa (Asteraceae) are used in Southern Italy against psoriasis and other skin diseases that occur with an imbalanced production of eicosanoids. We here assessed their in vitro effects upon 5-, 12-, 15-LOX and COX-1 enzymes as well as NF?B activation in intact cells as their possible therapeutic targets. All methanol crude extracts inhibited both 5-LOX and COX-1 activities under 200?g/mL, without significant effects on the 12-LOX pathway or any relevant in vitro free radical scavenging activity. NF?B activation was prevented by all extracts but A. mollis. Interestingly, A. ligustica, A. arborescens and A. mollis increased the biosynthesis of 15(S)-HETE, an anti-inflammatory eicosanoid. A. ligustica (IC50?=?49.5?g/mL) was superior to Silybum marianum (IC50?=?147.8?g/mL), which we used as antipsoriatic herbal medicine of reference. Its n-hexane, dichloromethane and ethyl acetate fractions had also inhibitory effects on the LTB4 biosynthesis (IC50s?=?9.6, 20.3 and 68?g/mL, respectively) evidencing that the apolar extracts of A. ligustica are promising active herbal ingredients for future phytotherapeutical products targeting psoriasis. 2014 The Authors. Phytotherapy Research published by John Wiley & Sons Ltd. PMID:25278440

  10. Aldose reductase inhibitory, anti-cataract and antioxidant potential of selected medicinal plants from the Marathwada region, India.

    PubMed

    Gacche, R N; Dhole, N A

    2011-04-01

    The water, ethanol and chloroform extracts of selected plants such as Adhatoda vasica (L.) (Acanthaceae), Caesalpinia bonduc (L.), Cassia fistula (L.) (Caesalpiniaceae) and Biophytum sensitivum (L.) (Oxalidaceae) were evaluated for rat lens aldose reductase inhibitory (RLAR) potential, anti-cataract and antioxidant activities. All the samples inhibited the aldose reductase considerably and exhibited anti-cataract activity, while C. fistula (IC(50), 0.154 mg mL(-1)) showed significant RLAR inhibitory activity as compared to the other tested samples, and was further found to be more effective in maintaining sugar-induced lens opacity in the rat lens model. The antioxidant potential of plant extracts was determined using DPPH (2,2-diphenyl-1-picryl hydrazine), hydroxyl (OH), nitric oxide (NO) and hydrogen peroxide (H(2)O(2)) scavenging activities, along with determination of reducing power, ferrous ion chelating ability and inhibition of polyphenol oxidase (PPO). The extracts of the tested plant showed significant free radical scavenging activities and inhibited the activity of enzyme PPO, a model oxidising enzyme. The plant samples were found to possess considerable amounts of vitamin C, total polyphenols and flavonoids. PMID:21462076

  11. Anti-Tumor Action, Clinical Biochemistry Profile and Phytochemical Constituents of a Pharmacologically Active Fraction of S. crispus in NMU-Induced Rat Mammary Tumour Model

    PubMed Central

    Yaacob, Nik Soriani; Yankuzo, Hassan Muhammad; Devaraj, Sutha; Wong, Jimmy Ka Ming; Lai, Choon-Sheen

    2015-01-01

    Cancer patients seek alternative remedies such as traditional medicinal plants for safe and effective treatment and help overcome the side effects of conventional therapy. Current knowledge indicates that extracts of Strobilanthes crispus of the Acanthaceae family exhibit potent anticancer properties in vitro and are non-toxic in vivo. S. crispus was also reported to be protective against chemical hepatocarcinogenesis. We previously showed that a bioactive fraction of S. crispus leaves also synergized with tamoxifen to cause apoptosis of human breast cancer cell lines without damaging non-malignant epithelial cells. The present study aimed to evaluate the antitumor effect of S. crispus dichloromethane fraction (F3) using N-methyl-N-Nitrosourea (NMU)-induced rat mammary tumor model. Tumor regression was observed in 75% of the rats following 8-week oral administration of F3 with no secondary tumour formation and no signs of anemia or infection. However, no improvement in the liver and renal function profiles was observed. Major constituents of F3 were identified as lutein, 131-hydroxy-132-oxo-pheophytin a, campesterol, stigmasterol, β-sitosterol, pheophytin a and 132-hydroxy-pheophytin a. These compounds however, may not significantly contribute to the antitumor effect of F3. PMID:26000968

  12. Toxicity and Neuropharmacological Effects of Elenine

    PubMed Central

    Navarro, Eduardo; Alonso, S. J.; Navarro, R.

    2011-01-01

    Elenine is the aglycone of elenoside, a cytotoxic arylnaphthalene lignan (NSC 644013-W/1) derived from Justicia hyssopifolia. (Family: Acanthaceae). Elenoside is a β-D-glucoside, with a similar chemical structure to etoposide, exhibiting central depressant activity. In the present study, elenine was given to mice and rats at doses of 10, 20, and 40 mg/kg. Acute toxicity (24 h) and general behaviour in mice was studied as well as its effects on muscular relaxant activity, locomotor activity (Varimex test), and the open-field test and were compared with 10 mg/kg of chlorpromazine. Elenine produced a reduction in the permanence time in muscular relaxant activity (traction test). Spontaneous activity was lower in the Varimex test. The ambulation and rearing were lower compared with the control group, and an increase in boluses was observed in the open-field test. Thus, it can be concluded that elenine has central sedative effects at lower doses than those used with elenoside and has a possible application in conditions of anxiety. PMID:21716687

  13. El Derecho de su Hijo(a) a Una Educacion: Una guia para los Padres de Ninos Impedidos en el Estado de Nueva York (Your Child's Right to an Education: A Guide for Parents of Children with Handicapping Conditions in New York State).

    ERIC Educational Resources Information Center

    New York State Education Dept. Albany. Office for the Education of Children with Handicapping Conditions.

    Intended for parents of handicapped students, the guide (available in English, Spanish, or Chinese) sets forth the New York State policies for speical education. The following topics are among those considered: eligibility for special education, program types, alternative placements (such as residential settings), referral, evaluation,

  14. Mitigation of Disagreement in Peer Review among L2 Learners and Native Speakers in a College Writing Class (Mitigación del Impacto de las Opiniones de Desacuerdo en el Proceso de Revisión por Pares entre Estudiantes de una Segunda Lengua y Hablantes Nativos en una Clase de Escritura a Nivel Universitario)

    ERIC Educational Resources Information Center

    Christoffersen, Katherine O'Donnell

    2015-01-01

    Peer review is now a commonplace practice in process-oriented writing instruction. A crucial aspect of peer review is assessing another classmate's work, which encompasses the act of disagreement. Given its prevalence in the classroom, it is necessary to analyze how L2 learners mitigate disagreement in the context of peer review with other L2…

  15. El Derecho de su Hijo(a) a Una Educacion: Una guia para los Padres de Ninos Impedidos en el Estado de Nueva York (Your Child's Right to an Education: A Guide for Parents of Children with Handicapping Conditions in New York State).

    ERIC Educational Resources Information Center

    New York State Education Dept. Albany. Office for the Education of Children with Handicapping Conditions.

    Intended for parents of handicapped students, the guide (available in English, Spanish, or Chinese) sets forth the New York State policies for speical education. The following topics are among those considered: eligibility for special education, program types, alternative placements (such as residential settings), referral, evaluation,…

  16. Una Guia para Los Padres sobre La Educacion Especial: El Derecho de Su Hijo(a) a Adquirir una Educacion en el Estado de Nueva York (A Parent's Guide to Special Education: Your Child's Right to an Education in New York State).

    ERIC Educational Resources Information Center

    New York State Education Dept. Albany. Office for the Education of Children with Handicapping Conditions.

    This guide provides information to help parents of special needs children in New York become active partners in the planning and implementation of special education programs. The first part of the guide provides in-depth information related to the special education process in New York State public schools. A historical view of children's rights to…

  17. La Implementacion de la Tecnologia en el Salon de Clases: Una guia para los que toman decisiones en las escuelas rurales (Putting Technology into the Classroom: A Guide for Rural Decision Makers).

    ERIC Educational Resources Information Center

    Boethel, Martha; Dimock, K. Victoria; Hatch, Lin; Adams, Sharon, Ed.; Heath, Marilyn, Ed.

    This guide is intended for superintendents and central office staff in small, rural school districts who are considering ways of using technology in the classroom. It provides information about why technology is worth the trouble and what it can accomplish, lays out the basic issues and tasks involved in integrating technology into classroom…

  18. Teacher: Can You See What I'm Saying? A Research Experience with Deaf Learners (Profe: ¿Puedes "ver" lo que estoy diciendo? Una experiencia de investigación con alumnos sordos)

    ERIC Educational Resources Information Center

    Ávila Caica, Olga Lucía

    2011-01-01

    This paper reports a study carried out with eleven deaf volunteers who belonged to different academic programs at a Colombian public university but did not receive English instruction as part of their professional training. The main goal of the research study was to identify the effect of using Internet resources as support for the design and…

  19. Ideologies Revealed during the Construction of Meaning in an EFL Class (Ideologías reveladas durante la construcción de significado en una clase de inglés como lengua extranjera)

    ERIC Educational Resources Information Center

    Fajardo Mora, Néstor Ricardo

    2014-01-01

    This article reports on an interpretive qualitative study conducted at a public university in Bogotá with 26 pre-service social studies teachers. It is focused on unveiling which ideologies are discovered when they construct the meaning of texts through text-based tasks in an English as a foreign language class. The data were collected by using…

  20. Developing Academic Literacy and Voice: Challenges Faced by a Mature ESL Student and Her Instructors (Desarrollo del discurso académico y la voz: retos de una estudiante de inglés como segunda lengua y sus profesores)

    ERIC Educational Resources Information Center

    Correa, Doris

    2010-01-01

    Drawing on critical, socio-cultural and sociolinguistic theories of writing, text and voice, this ethnographic study examines the challenges that a mature ESL student and her instructors in a university course on Spanish Language Media face as they co-construct a common understanding of academic literacy and voice in an undergraduate General…

  1. The Feasibility of Assessing Teenagers' Oral English Language Performance with a Rubric (La viabilidad de evaluar el desempeño oral de los adolescentes en inglés con una rúbrica)

    ERIC Educational Resources Information Center

    Pineda, Diana

    2014-01-01

    This article reports the experience of a study group in a public university in Colombia, formed mostly by academic coordinators who worked in the design of assessment rubrics. Its focus is on the experience of the academic coordinator of the English program for teenagers, who concentrated on implementing the rubric to assess the students' oral…

  2. Teachers' Knowledge of Second Language and Curriculum: A Narrative Experience (Conocimiento de los profesores acerca de la segunda lengua y el currículo: una experiencia narrativa)

    ERIC Educational Resources Information Center

    Mendieta Aguilar, Jenny Alexandra

    2011-01-01

    This study was carried out with a group of three teachers who work for the foreign languages department of a private university in Colombia. It was aimed at unveiling and characterizing the narrative knowledge these teachers hold about language teaching and learning processes as well as the role this knowledge plays in the constant construction…

  3. Online Peer Feedback between Colombian and New Zealand FL Beginners: A Comparison and Lessons Learned (Retroalimentación virtual de pares entre aprendices principiantes de lengua de Colombia y Nueva Zelanda: una comparación y lecciones aprendidas)

    ERIC Educational Resources Information Center

    Tolosa, Constanza; Ordóñez, Claudia Lucía; Alfonso, Tania

    2015-01-01

    We report on an exploratory study comparing the performance as online tutors of two groups of beginner eleven-year-old students of English in Colombia and Spanish in New Zealand. The native speaker students of the foreign language the others were learning corrected paragraphs written by their peers. The feedback provided by each group of tutors…

  4. Contributions of a Social Justice Language Teacher Education Perspective to Professional Development Programs in Colombia (Contribuciones de una perspectiva de justicia social para la formación de docentes de lenguas a los programas de desarrollo profesional en Colombia)

    ERIC Educational Resources Information Center

    Sierra Piedrahita, Ana María

    2016-01-01

    In this article, the author discusses the social justice language teacher education perspective and how it can help language teachers to develop a political view of their work and effect change inside and outside their particular school contexts. To do this, she briefly analyzes various professional development programs for teachers of English in…

  5. Fostering Intercultural Communicative Competence through Reading Authentic Literary Texts in an Advanced Colombian EFL Classroom: A Constructivist Perspective (Desarrollo de la competencia comunicativa intercultural mediante la lectura de textos literarios auténticos: una perspectiva constructivista)

    ERIC Educational Resources Information Center

    Gómez, Luis Fernando R.

    2012-01-01

    This article describes an action research experience carried out in an advanced English as a foreign language classroom of the language program at a university in Bogotá, Colombia, in 2010. The study proposes the inclusion of authentic literary texts in the English as a foreign language classroom through the implementation of four constructivist…

  6. The Latinas' Guide to the Information Superhighway: A Bilingual Guide for Latinas by Latinas = Guia para Mujeres Latinas sobre la Supercarretera de la Informacion: Una Guia Bilingue para Latinas por medio de Latinas.

    ERIC Educational Resources Information Center

    MANA, A National Latina Organization, Washington, DC.

    This guide to the Internet is designed to give Latinas basic information on computers and the information superhighway. Written in both Spanish and English, the guide begins by defining the Internet and making some suggestions about acquiring access to a computer. Among the topics discussed are how to choose an Internet service provider, how to…

  7. Viajando por la Carretera de la Educacion Especial: Una Guia para los Padres para Tener un Viaje Feliz y Seguro (Traveling the Special Education Highway: A Parent's Guide to a Safe and Happy Journey).

    ERIC Educational Resources Information Center

    Santa Maria, Karen

    Designed for Spanish-speaking parents, this brochure, written in Spanish, uses a car-trip analogy to describe special education services for students with disabilities. It addresses: (1) child find; (2) initial evaluation and eligibility determination; (3) categories of students who receive special education services and related services; (4)…

  8. Una Ricerca sull'Applicazione del TALB (Test di Attitudine Linguistica per Bambini) nella Scola Elementare [Research on the Application of the TALB (A Test for Linguistic Aptitude for Children) in Elementary School].

    ERIC Educational Resources Information Center

    Acone, Ilario

    1992-01-01

    Discusses the administration of the Test di Attitudine Linguistica per Bambini (TALB) to students 7-9 years of age. Correlations between the TALB and achievement tests administered at the end of the course were very high. It is concluded that aptitude is a main factor in successful learning of a second language. (16 references) (LET)

  9. "Una Communita" Poco Nota della Communicazione non Verbale: Come Communicano il Direttore e l'Orchestra (A Little Known "Community" of Nonverbal Communication: How the Conductor and Orchestra Communicate).

    ERIC Educational Resources Information Center

    Leonardi, Magda Farago

    1992-01-01

    Examines how conductors and orchestras communicate. Communication is essentially nonverbal. Conductors use gestures, gaze, facial expression, nods and posture to deliver their message. Norbert Weiner's Cybernetic Theory of human communication is seen as a means of analyzing precisely how this musical communication takes place. (16 references) (LET)

  10. SOS! Ayuda para Padres: Una Guia Practica para Manejar Problemas de Conducta Comunes y Corrientes. (SOS! Help for Parents: A Practical Guide for Handling Common Everyday Behavior Problems.) Leader's Guide.

    ERIC Educational Resources Information Center

    Clark, Lynn

    This Spanish-language version of "SOS" provides parents with guidance for handling a variety of common behavior problems based on the behavior approach to child rearing and discipline. This approach suggests that good and bad behavior are both learned and can be changed, and proposes specific methods, skills, procedures, and strategies for parents

  11. Pautas para Organizar Una Actividad de Capacitacion: Un Seminario-Taller para el Desarrollo de Personal de Direccion de Sistemas Educativos (Guidelines to Organize a Training Activity: A Workshop for Management Development of Educational Systems).

    ERIC Educational Resources Information Center

    Valle, Victor M.

    Often personnel performing managerial functions within educational systems are educators with almost no training in management. This paper presents ideas on how to organize a training activity intended to develop management knowledge and skills among educational systems officials and to implement an organizational self-study on management…

  12. "Buddy System": A Pedagogical Innovation to Promote Online Interaction (Sistema de amigos: una innovación pedagógica para fomentar la interacción en línea)

    ERIC Educational Resources Information Center

    Espitia Cruz, Martha Isabel; Kwinta, Anna

    2013-01-01

    Recent technological development has created new pedagogical practices in the EFL classroom to maximize the time for students to use the language by considering online tools. Whilst working in a pedagogical context with new technologies, some educators were concerned with how online interaction in EFL content-based classes could be effectively…

  13. World bank's role in the electric power sector: Policies for effective institutional, regulatory, and financial reform. World Bank policy paper. Funcion del banco mundial en el sector de la electricidad: politicas para efectuar una reforma institucional, regulatoria y financiera eficaz

    SciTech Connect

    Not Available

    1993-01-01

    The paper outlines the World Bank's new policies for the energy sector. It recommends several new policies to improve the performance of the electric power sector in developing countries. Bank loans for electric power will go first to countries clearly committed to improving the performance of their power sectors. The Bank will also discourage subsidies on energy prices and will encourage private investment in utilities. And it will provide financing to help the least developed countries import power where local generation is not practical.

  14. Desarrollo de una Interfaz de Control para un Observatorio Astronómico Robotizado con fines educativos en la Facultad de Ciencias Exactas; Físicas y Naturales de la UNSJ

    NASA Astrophysics Data System (ADS)

    Pogrebinsky, L.; Francile, C.

    We report the development and the construction of an Interface to Control a robotized Astronomical Observatory (ICOA), which allows to control the operation of an observatory based on a Meade LX200 telescope. The interface operates together with a computer to control and supervise all the local variables of the observatory, and can take the control of it in risky situations. It serves as a link among the control computer and all the necessary devices for the astronomical observation such as the telescope, the dome, the weather station, the CCD camera, the calibration devices and the security devices. The computer receives orders from an operator who can be or not at the site of observation. The goal of this robotized observatory is the operation in a secure, autonomous and unattended way, with the purpose of to be used remotely by the students of the "Facultad de Ciencias Exactas, Físicas y Naturales" of the UNSJ. FULL TEXT IN SPANISH

  15. El Instituto de Nutrición de Centro América y Panamá: Servicios de Información Científica en Una Región en Vía de Desarrollo *

    PubMed Central

    Flores, Raquel; Corado, Adelina; Girón, Arturo

    1964-01-01

    Pioneering scientific information in underdeveloped areas poses several problems, such as (1) lack of understanding on the part of key functionaries as to the why, what, and when of information services; (2) lack of trained personnel to assume the responsibility for such services; (3) lack of economic resources; and (4) lack of information pertaining to available bibliographical sources in the particular area or region. The Bibliographic and Documentation Service of the Institute of Nutrition of Central America and Panama (INCAP) provides, in addition to the customary services, technical assistance for the organization or reorganization of biomedical libraries and makes INCAP library materials available to member countries, either by loan or photocopy. Although the program was designed for the member countries, INCAP tries to make its services available to other Latin American nations, Africa, and Asia, where similar nutritional problems are being studied. PMID:14119292

  16. Alcoholism and the Hispanic: A Mutual Concern = El Alcoholismo y Los Hispanos Una Preocupacion Nacional. Proceedings of the National Hispanic Conference on Alcoholism (San Antonio, Texas, September 7-10, 1981).

    ERIC Educational Resources Information Center

    AVANTE International Systems Corp., San Antonio, TX.

    Written in Spanish and English, the proceedings include 6 papers and the recommendations presented at the conference on alcoholism and alcohol-related problems among Hispanics attended by approximately 400 participants, representing 29 states, Puerto Rico, and Mexico. "The Challenge of the 1980's: Action Through Unity" discusses the need for unity…

  17. Vinculos Entre la Capacitacion de Docentes y el Desarrollo de Materiales Educativos Impresos--Anotaciones para Una Discusion (Links between In-service Teacher Training and the Development of Printed Educational Aids).

    ERIC Educational Resources Information Center

    Valle, Victor M.

    Textbooks and other printed materials will be ever present, in the foreseeable future, as major aids for teaching and learning processes. New textbooks imply new guidelines for teachers, and the ways to handle such guidelines demand teacher training. This paper explains some links between inservice teacher training programs and the development of…

  18. Guiandose por la Intrincada Senda de la Educacion Especial: Una Guia para Padres y Maestros. Tercera Edicion. (Negotiating the Special Education Maze: A Guide for Parents & Teachers. Third Edition).

    ERIC Educational Resources Information Center

    Anderson, Winifred; Chitwood, Stephen; Hayden, Deidre

    Designed to assist Spanish-speaking parents and teachers in understanding special education procedures, this book describes the process for obtaining school services for children with disabilities. An introduction reviews six major provisions of the Individuals with Disabilities Education Act (IDEA) that relate to children's rights to a free,…

  19. Linguistica matematica, statistica linguistica e linguistica applicata. Una nota storica sui lessici di frequenza e l'educazione linguistica (Mathematical Linguistics, Linguistic Statistics, and Applied Linguistics. An Historical Note on Word Frequencies and Linguistic Education)

    ERIC Educational Resources Information Center

    Elia, Annibale

    1977-01-01

    This article traces the history of several themes in applied linguistics and to show the relationships between linguistic theory and the sciences concerned with the learning and teaching of languages. Interest in word frequency statistics is discussed in particular. (Text is in Italian.) (CFM)

  20. Ayudando a los Ninos a Amarse a Si Mismos y a Otros: Una guia profesional para el cuidado infantil en el hogar (Helping Children Love Themselves and Others: A Professional Handbook for Family Day Care).

    ERIC Educational Resources Information Center

    Gellert, Sandra; And Others

    This Spanish-language guide presents an anti-bias, multicultural approach to family day care. Part A provides a rationale for such an approach. Subsections of this part concern: (1) family day care as a site for the transmission of bias; (2) characteristics of an anti-bias, multicultural approach; (3) language and stereotypes; (4) developmental…

  1. Fields without Borders: An Anthology of Documentary Writing and Photography by Student Action with Farmworkers' Interns = Campos sin Fronteras: Una Antologia de Obras Escritas y Fotografia por Estudiantes Internos de Accion Estudiantil con Trabajadores Agricolas.

    ERIC Educational Resources Information Center

    Manly, Libby, Ed.; Okie, Alejandra, Ed.; Wiggins, Melinda, Ed.

    In this booklet, essays and poems, presented both in English and in Spanish, portray the feelings, conditions, and economic plight of migrant and seasonal farmworkers in North and South Carolina, often in their own words. A preface describes Student Action with Farmworkers summer internships in which college students spend 10 weeks working with…

  2. Puerto Rican Psychology: A Review of Issues Pertaining to Assessment and Counseling = La Psicologia Puertorriquena: Una Revision de la Problematica Relacionada con la Medicion y la Consejeria. Monograph #135.

    ERIC Educational Resources Information Center

    Prewitt-Diaz, Joseph O., Ed.

    This is a collection of papers related to psychological assessment and counseling in Puerto Rico. Included are: (1) an introduction (in Spanish), by Joseph O. Prewitt-Diaz; (2) "A Procedure for Constructing Valid Cross-Cultural Attitude Measures for Use in Puerto Rico," by Cecil R. Trueblood; (3) "Perfil de Personalidad en el Adolescente…

  3. Bilinguismo e immigrazione: una nota sociolinguistica al piano europeo di mantenimento delle lingue nazionali nelle comunita di emigrati (Bilingualism and Immigration: A Sociolinguistic View of the European Plan for the Maintainance of National Languages in Immigrant Communities).

    ERIC Educational Resources Information Center

    Tosi, Arturo

    1979-01-01

    Outlines the European Economic Community's (EEC) plan for the maintainance of national languages among immigrants. Describes the variety of objectives behind the EEC's linguistic policy as incompatible with the creation of a unified instructional approach. Emphasizes that dialects spoken within immigrant families create additional problems in…

  4. Puerto Rican Psychology: A Review of Issues Pertaining to Assessment and Counseling = La Psicologia Puertorriquena: Una Revision de la Problematica Relacionada con la Medicion y la Consejeria. Monograph #135.

    ERIC Educational Resources Information Center

    Prewitt-Diaz, Joseph O., Ed.

    This is a collection of papers related to psychological assessment and counseling in Puerto Rico. Included are: (1) an introduction (in Spanish), by Joseph O. Prewitt-Diaz; (2) "A Procedure for Constructing Valid Cross-Cultural Attitude Measures for Use in Puerto Rico," by Cecil R. Trueblood; (3) "Perfil de Personalidad en el Adolescente

  5. Expresiones de Modalidad en una Situacion de Contacto: "Deber (De)" Vs. "Tener Que" en el Espanol Hablado en Houston (Expressions of Modals in a Contact Situation in the Spanish Spoken in Houston).

    ERIC Educational Resources Information Center

    Fairclough, Marta

    2000-01-01

    Examined an aspect of modality in the Spanish spoken in the Houston, Texas community. Demonstrates that semantic-pragmatic variation and change are taking place and affecting the forms of "deber (de) and "tener que" in their deontic and epistemic modes. Interviewed Mexicans and Mexican-Americans in Spanish. Analyses show an increased use of "tener…

  6. La Provision de una Igualdad de Oportunidades Educativas para los Estudiantes con Conocimientos Limitados del Idioma Ingles (The Provision of an Equal Education Opportunity to Limited English Proficient Students).

    ERIC Educational Resources Information Center

    Office for Civil Rights (ED), Washington, DC.

    This federal policy statement outlines policy on provision of education to limited-English-speaking school children. First, it describes briefly the demographics of this population and the academic difficulties faced by them, and the recent federal initiative for broadened educational opportunity, America 2000: An Education Strategy. Then,…

  7. Hacia una pedagogia Co-emergente, Transaccional y Transcultural: El Cuento Ultracorto de Cienca Ficcion en Ingles (Towards a Co-emerging Transactional and Transcultural Pedagogy: The Science Fiction Short Short Story in English).

    ERIC Educational Resources Information Center

    Zoreda, Margaret Lee

    An outline of a "co-emergent" pedagogical perspective describes the conceptual framework for an advanced university-level English-as-a-Foreign-Language (EFL) course. The course framework, which involves choosing and studying a brief science fiction story, allows for transcultural encounters via a transactional literary approach in which the…

  8. Writing Using Blogs: A Way to Engage Colombian Adolescents in Meaningful Communication (La escritura a través de bitácoras o "blogs": una forma de involucrar a adolescentes colombianos en comunicación significativa)

    ERIC Educational Resources Information Center

    Rojas Álvarez, Gloria

    2011-01-01

    We report an action research project developed with ninth grade students of a public school in Bogotá, Colombia, and which focused on innovating English communication through writing blogs. The project took into account the implementation of a specific blog that proposes activities, suggestions, strategies and links, among other things, to…

  9. Towards Contextual Experimentation: Creating a Faculty Learning Community to Cultivate Writing-to-Learn Practices (Hacia una experimentación contextual: Creando comunidades de aprendizaje docente para el cultivo de prácticas de escritura para el aprendizaje)

    ERIC Educational Resources Information Center

    Chang, Mary K.; Rao, Kavita; Stewart, Maria L.; Farley, Cynthia A.; Li, Katherine

    2016-01-01

    In order to explore ways to integrate new pedagogical practices, five faculty members created an informal faculty learning community focused on writing-to-learn practices, an inquiry and process-based writing pedagogy. The faculty members learned the writing-to-learn practices together, periodically met to discuss how they implemented the…

  10. Introduccion a la Evaluacion: Una introduccion practica a la evaluacion en proyectos para la ninez de temprana edad (Introducing Evaluation: A Practical Introduction to Evaluation in Early Childhood Projects).

    ERIC Educational Resources Information Center

    Eyken, Willem van der

    Developed for the staff of field projects, this booklet provides guidelines for evaluating projects to promote activities that will enhance the well-being of young children, their families, and their communities. The booklet aims to stimulate ideas and discussions, offers general principles to help in evaluation, and raises issues that encourage…

  11. Studiar L'inglese dalle elementari--Problema europeo: Una proposta nuova della pedagogia cibernetica (Beginning the Study of English in the Elementary School Grades--A European Problem: A New Proposal from Cibernetic Education).

    ERIC Educational Resources Information Center

    Chiti-Batelli, Andrea

    1986-01-01

    Warns the European community of the dangers of accepting English as the international language and urges the adoption of Esperanto, a neutral language without its own cultural tradition, as the international lingua franca. (CFM)

  12. Kathy Attends a Mother-to-Mother Support Group Meeting. Mother-to-Mother Support = Josefa Asiste a una Reunion de Grupo de Apoyo de Madre a Madre. Apoyo Madre a Madre.

    ERIC Educational Resources Information Center

    Magalhaes, Rebecca; Stone-Jimerez, Maryanne; Allen de Smith, Paulina; Smith, Natalia

    These magazine-sized booklets, one in English, one in Spanish, are in cartoon format and designed to be used by people with limited literacy in English or Spanish. This booklet explains what a mothers' support group is, and that mothers share experiences and information about breastfeeding, invite friends and relatives to attend, and is…

  13. Teacher Collaboration Praxis: Conflicts, Borders, and Ideologies from a Micropolitical Perspective (La práctica colaborativa entre docentes: conflictos, fronteras e ideologías desde una perspectiva micropolítica)

    ERIC Educational Resources Information Center

    Keranen, Nancy; Encinas Prudencio, Fátima

    2014-01-01

    This paper looks at a feature of teacher collaboration within Achinstein's (2002) micropolitics of collaboration but from an intrapersonal perspective. Results discussed feature issues of conflict, borders, and ideologies within each participating teacher rather than between teachers. Unresolved or unacknowledged intrapersonal conflict might lead…

  14. El análisis de un estudio clínico indica que una combinación de fármacos puede ser de gran eficacia

    Cancer.gov

    El uso de un tratamiento farmacológico combinado para el cáncer de ovario recidivante mostró mejorías significativas, según se informó el día de hoy en el congreso anual de la Sociedad Americana de Oncología Clínica (ASCO). La combinación farmacológica se

  15. Un Nuevo Convenio para el Aprendizaje: Una Sociedad para Mejorar los Resultados Educativos en el Estado de Nueva York (A New Compact for Learning: A Partnership To Improve Educational Results in New York State).

    ERIC Educational Resources Information Center

    New York State Education Dept., Albany. Office of Elementary, Middle and Secondary Education.

    This Spanish translation of the abridged version of "A New Compact for Learning" acknowledges the current U.S. education system's inadequacy to educate U.S. citizenry and introduces New York State's New Compact for Learning, intended as a plan to reorganize New York's own system. The compact's fundamental principles are: (1) recognizing that all…

  16. Receta para el Exito. Una Guia Actualizada para Padres sobre el Mejoramiento de las Escuelas de Colorado y Logros Estudiantiles (Recipe for Success: An Updated Parents' Guide to Improving Colorado Schools and Student Achievement).

    ERIC Educational Resources Information Center

    Taher, Bonnie; Durr, Pamela

    This Spanish language guide describes ways that parents can help improve student achievement and school quality. It answers such questions as: how to choose the right early-education opportunity for a preschooler; how to make sure a 5-year-old is ready for school; how to help a daughter do well in school; how to work with a daughter's or son's…

  17. SOS! Ayuda para Padres: Una Guia Practica para Manejar Problemas de Conducta Comunes y Corrientes. (SOS! Help for Parents: A Practical Guide for Handling Common Everyday Behavior Problems.) Leader's Guide.

    ERIC Educational Resources Information Center

    Clark, Lynn

    This Spanish-language version of "SOS" provides parents with guidance for handling a variety of common behavior problems based on the behavior approach to child rearing and discipline. This approach suggests that good and bad behavior are both learned and can be changed, and proposes specific methods, skills, procedures, and strategies for parents…

  18. Jovenes con Discapacidades y Enfermedades Cronicas: Una Guia Introductoria para Joyenes y Padres. Revisiones de CYDLINE (Youth with Disabilities and Chronic Illnesses: An Introductory Guide for Youth and Parents. CYDLINE Reviews). Parents. CYDLINE Reviews.

    ERIC Educational Resources Information Center

    Minnesota Univ., Minneapolis. National Center for Youth with Disabilities.

    This bibliography covers a wide range of issues related to the needs of adolescents and young adults with chronic illnesses and disabilities and their families. For each item in the bibliography, information provided includes author, title, source, date, and abstract. Price information is given when available. Materials include books, audiotapes,…

  19. Little Steps for New Parents: A Week-by-Week Guide and Journal for Baby's First Year = Pasitos para nuevos padres: Una guia y diario semanal para el primer ano del bebe.

    ERIC Educational Resources Information Center

    Briggs, Sandy

    Providing young infants with a loving and interesting environment through play will have a positive impact on their future. This book, designed for first time parents, provides simple and enjoyable activities intended to promote brain development during the first year. The book's introduction discusses the importance of the environment during the

  20. Hacia la creacion de una filosofia latinoamericana. Un ensayo nacionalista: El perfil del hombre y la cultura en Mexico (Toward the Creation of a Latin American Philosophy. An Essay on Nationalism: A Profile of the Mexicans and Their Culture).

    ERIC Educational Resources Information Center

    Mendoza, Manuel

    An analysis of a Mexican essay by Samuel Ramos attempts to resolve the issue of whether or not there is a common philosophy in Latin America today. Manuel Mendoza concludes that no such philosophy exists, because the area has not had time to develop an internal character, and as a result, the intellectual and and philosophical concepts are based…

  1. Task-Based Language Learning: Old Approach, New Style. A New Lesson to Learn (Aprendizaje basado en tareas: un antiguo enfoque, un nuevo estilo. Una nueva lección para aprender)

    ERIC Educational Resources Information Center

    Rodríguez-Bonces, Mónica; Rodríguez-Bonces, Jeisson

    2010-01-01

    This paper provides an overview of Task-Based Language Learning (TBL) and its use in the teaching and learning of foreign languages. It begins by defining the concept of TBL, followed by a presentation of its framework and implications, and finally, a lesson plan based on TBL. The article presents an additional stage to be considered when planning…

  2. Reaching Higher. A Parent's Guide to the Washington Assessment of Learning. Revised = Para llegar mas arriba. Una guia para padres sobre la evaluacion del aprendizaje de los estudiantes del estado de Washington (Washington Assessment of Student Learning). Revisado.

    ERIC Educational Resources Information Center

    Washington Office of the State Superintendent of Public Instruction, Olympia.

    This guide in English and Spanish is designed to answer questions parents may have about the Washington Assessment of Student Learning (WASL), including how it will help improve their children's education, how it is scored, and how to use the information it provides. In Washington, clear educational goals for subject content, thinking skills, and…

  3. Methodology for producing 100 tons of fuel peat for a cement plant test burn. Metodologia para producir 100 toneladas de turba combustible para una prueba de quema en uns planta de cemento

    SciTech Connect

    Allen, A.B.; Malavassi, L.; Ramirez, O.; Thayer, G. , Plymouth, NC; RECOPE, San Jose; Los Alamos National Lab., NM )

    1989-05-01

    As a part of the Agency for International Development-funded cooperative project between Los Alamos and Costa Rica, the burning characteristics of Costa Rican peat were to be tested in an application. The cement plant owned by Industria National de Cemento in Cartago has a capability to handle solid fuel and was chosen for the burn demonstration. The Jungle No. 1 Peat Deposit near El Cairo was chosen as the site of the peat excavation. This peat production methodology study covers project site selection, installation of an access road and clearing of the jungle vegetation, removal of an upper layer of organic peat, excavation of fuel-grade peat, transport of the peat to the drying site, and drying and stockpiling of the finished product. As of this date the peat removal for the demonstration project has been started, and a description of the operation is included as an appendix to this paper. 10 figs.

  4. La Desercion Escolar en los Niveles de Sexto y Noveno Grado: Una Comparacion Entre Zonas Rurales y Urbanas. Boletin 219 (The Educational Desertion in the 6th and 9th Grades: A Comparison Between Rural and Urban Zones. Bulletin 219).

    ERIC Educational Resources Information Center

    Lopez, Maria I. Hernandez; And Others

    In 1962 and again in 1965, a group of sixth and ninth grade students in selected schools in four Puerto Rican communities were interviewed to investigate the factors influencing students' decision to withdraw from school before completing twelfth grade and to identify some characteristics of dropouts. Of 616 students interviewed in 1962, 20.9% of…

  5. Methanolic Extract of Clinacanthus nutans Exerts Antinociceptive Activity via the Opioid/Nitric Oxide-Mediated, but cGMP-Independent, Pathways

    PubMed Central

    Abdul Rahim, Mohammad Hafiz; Zakaria, Zainul Amiruddin; Mohd Sani, Mohd Hijaz; Omar, Maizatul Hasyima; Yakob, Yusnita; Cheema, Manraj Singh; Ching, Siew Mooi; Ahmad, Zuraini; Abdul Kadir, Arifah

    2016-01-01

    The objectives of the present study were to determine the mechanisms of antinociceptive effect of methanol extract of Clinacanthus nutans (Acanthaceae) leaves (MECN) using various animal nociceptive models. The antinociceptive activity of orally administered 10% DMSO, 100 mg/kg acetylsalicylic acid (ASA), 5 mg/kg morphine, or MECN (100, 250, and 500 mg/kg) was determined using the acetic acid-induced abdominal constriction (ACT), formalin-induced paw licking (FT), and hot plate tests (HPT). The role of opioid and nitric oxide/cyclic guanosine monophosphate (NO/cGMP) systems was also investigated. The results showed that MECN produced a significant (p < 0.05) antinociceptive response in all nociceptive models with the recorded ED50 value of 279.3 mg/kg for the ACT, while, for the early and late phases of the FT, the value was >500 mg/kg or 227.7 mg/kg, respectively. This antinociceptive activity was fully antagonized by naloxone (a nonselective opioid antagonist) but was partially reversed by l-arginine (l-arg; a nitric oxide [NO] precursor), Nω-nitro-l-arginine methyl ester hydrochloride (l-NAME; an NO synthase inhibitor), or their combinations thereof. In contrast, 1H-[1,2,4]oxadiazole[4,3-a]quinoxalin-1-one (ODQ; a soluble guanylyl cyclase inhibitor) enhanced the extract's antinociception. UHPLC analysis revealed the presence of several flavonoid-based compounds with antinociceptive action. In conclusion, MECN exerted the peripherally and centrally mediated antinociceptive activity via the modulation of the opioid/NO-mediated, but cGMP-independent, systems. PMID:27190528

  6. In vitro antimalarial activity of extracts of some plants from a biological reserve in Costa Rica.

    PubMed

    Chinchilla, Misael; Valerio, Idalia; Sánchez, Ronald; Mora, Víctor; Bagnarello, Vanessa; Martínez, Laura; Gonzalez, Antonieta; Vanegas, Juan Carlos; Apestegui, Alvaro

    2012-06-01

    Treatment with the usual antimalarial drugs, have induced parasite resistance, reinforcing the need to finding natural antimalarial components that would be found on plants from the forest. Therefore, we decided to look for these components in Costa Rican plants from a protected forest area. Fresh and dry extracts of roots, bark, leaves, flowers and fruits of 25 plants from a biological reserve in Costa Rica, Reserva Biol6gica Alberto Manuel Brenes (REBAMB), were studied in vitro for the presence of substances with antimalarial activity. By studying the inhibition of P berghei schizogony, we assessed the antimalarial activity of several plant extracts: Aphelandra aurantiaca, A. tridentata (Acanthaceae); Xanthosoma undipes (Araceae); Iriartea deltoidea (Arecaceae); Neurolaena lobata (Asteraceae); Senna papillosa, Pterocarpus hayessi, Lonchocarpus pentaphyllus (Fabaceae); Nectandra membranacea, Persea povedae, Cinamomum chavarrianum (Lauraceae); Hampea appendiculata (Malvaceae); Ruagea glabra, Guarea glabra (Meliaceae); Psidium guajava (Myrtaceae); Bocconia frutescens (Papaveraceae); Piper friedrichsthalii (Piperaceae); Clematis dioica (Ranunculaceae); Prunus annularis (Rosaceae); Siparuna thecaphora (Siparunaceae); Solanum arboreum, Witheringia solanacea (Solanaceae); Ticodendrum incognitum (Ticodendraceae); Heliocarpus appendiculatus (Tiliaceae) and Myriocarpa longipes (Urticaceae). We used different parts of the plants as well as fresh and dried extracts for testing IC50. The solid content of the extracts ranged from 1-71.9 microg/mL. The fresh extracts showed stronger activity than the dry ones. Since the plants showing the strongest antimalarial activity are very common in Central America, and some similar genera of these plants have shown positives results in South America, we considered important to present these findings for discussion. On the other hand, this is the first systematic study of this kind ever realized in a circumscribed and protected area of Costa Rica. PMID:23894953

  7. Useful ethnophytomedicinal recipes of angiosperms used against diabetes in South East Asian Countries (India, Pakistan & Sri Lanka).

    PubMed

    Marwat, Sarfaraz Khan; Rehman, Fazalur; Khan, Ejaz Ahmad; Khakwani, Abdul Aziz; Ullah, Imdad; Khan, Kaleem Ullah; Khan, Inam Ullah

    2014-09-01

    This paper is based on data recorded from various literatures pertaining to ethnophytomedicinal recipes used against diabetes in South East Asia (India, Pakistan and Srilanka). Traditional plant treatments have been used throughout the world for the therapy of diabetes mellitus. In total 419 useful phytorecipes of 270 plant species belonging to 74 Angiospermic families were collected. From the review it was revealed that plants showing hypoglycemic potential mainly belong to the families, Cucurbitaceae (16 spp.), Euphorbiaceae (15 spp.), Caesalpiniaceae and Papilionaceae (13 spp. each), Moraceae (11 spp.), Acanthaceae (10 spp.), Mimosaceae (09 spp.), Asteraceae, Malvaceae and Poaceae (08 spp. each), Hippocrateaceae, Rutaceae and Zingiberaceae (07 spp. each), Apocynaceae, Asclepiadaceae and Verbenaceae (06 spp. each), Apiaceae, Convolvulaceae, Lamiaceae, Myrtaceae, Solanaceae (05 spp.each). The most active plants are Syzigium cumini (14 recipes), Phyllanthus emblica (09 recipes), Centella asiatica and Momordica charantia (08 recipes each), Azadirachta indica (07 recipes), Aegle marmelos, Catharanthus roseus, Ficus benghalensis, Ficus racemosa, Gymnema sylvestre (06 recipes each), Allium cepa, A. sativum, Andrographis paniculata, Curcuma longa (05 recipes each), Citrullus colocynthis, Justicia adhatoda, Nelumbo nucifera, Tinospora cordifolia, Trigonella foenum-graecum, Ziziphus mauritiana and Wattakaka volubilis (4 recipes each). These traditional recipes include extracts, leaves, powders, flour, seeds, vegetables, fruits and herbal mixtures. Data inventory consists of botanical name, recipe, vernacular name, English name. Some of the plants of the above data with experimentally confirmed antidiabetic properties have also been recorded. More investigations must be carried out to evaluate the mechanism of action of diabetic medicinal plants. Toxicity of these plants should also be explained. Scientific validation of these recipes may help in discovering new drugs from these medicinal plants for diabetes. PMID:25176368

  8. In vitro antioxidant potential of dicliptera roxburghiana

    PubMed Central

    2013-01-01

    Background Stress caused by free radicals accumulation result into many hazardous diseases. A number of investigations are focusing to find out the plant oriented natural antioxidant moieties. The basic aim of this research was to investigate the antioxidant potential, total Phenolic and flavonoids contents and photochemical screening of the crude methanol extract and its derived various fractions Dicliptera roxburghiana of Acanthaceae family. Methods Crude methanol extract of aerial parts of Dicliptera roxburghiana (DRME) was partitioned in to n-hexane (DRHF), chloroform (DRCF), ethyl acetate (DREF), n-butanol (DRBF) and the remaining soluble portion as residual aqueous fraction (DRAF). We evaluated the antioxidant activities of the extract and various fractions through different analytical methods such as DPPH, superoxide anion, ABTS, H2O2, hydroxyl radical and phosphomolybdate radical inhibition. In vitro lipid peroxidation and reducing power of the plant was also analyzed. Total flavonoid and phenolic contents of the extract and all fractions were also quantified. Plant was also subjected for preliminary phytochemical screening to confirm the presence or absence of various constituents in the plant. Results Phytochemical screening confirmed the presence of flavonoids, phenolics, tannins, alkaloids, saponins, terpenoids and coumarines. Quantitative analysis revealed the maximum amount of total phenolic and flavonoid contents in DRME while lowest in DRHF. Methanol extract, DREF, DRCF and DRBF exhibited promising antioxidant potential for DPPH, ABTS, H2O2, phosphomolybdate, superoxide anion and hydroxyl radical scavenging capabilities, while these were not appreciable for DRHF and DRAF. All fractions except DRHF and DRAF possess strong reducing power ability and showed appreciable lipid peroxidation inhibition. Conclusion These research investigations revealed that Dicliptera roxburghiana is a potent source of natural antioxidants. Hence the plant can be used for management of different stress and anxiety related ailments. PMID:23777321

  9. Short Communication An efficient method for simultaneous extraction of high-quality RNA and DNA from various plant tissues.

    PubMed

    Oliveira, R R; Viana, A J C; Reátegui, A C E; Vincentz, M G A

    2015-01-01

    Determination of gene expression is an important tool to study biological processes and relies on the quality of the extracted RNA. Changes in gene expression profiles may be directly related to mutations in regulatory DNA sequences or alterations in DNA cytosine methylation, which is an epigenetic mark. Correlation of gene expression with DNA sequence or epigenetic mark polymorphism is often desirable; for this, a robust protocol to isolate high-quality RNA and DNA simultaneously from the same sample is required. Although commercial kits and protocols are available, they are mainly optimized for animal tissues and, in general, restricted to RNA or DNA extraction, not both. In the present study, we describe an efficient and accessible method to extract both RNA and DNA simultaneously from the same sample of various plant tissues, using small amounts of starting material. The protocol was efficient in the extraction of high-quality nucleic acids from several Arabidopsis thaliana tissues (e.g., leaf, inflorescence stem, flower, fruit, cotyledon, seedlings, root, and embryo) and from other tissues of non-model plants, such as Avicennia schaueriana (Acanthaceae), Theobroma cacao (Malvaceae), Paspalum notatum (Poaceae), and Sorghum bicolor (Poaceae). The obtained nucleic acids were used as templates for downstream analyses, such as mRNA sequencing, quantitative real time-polymerase chain reaction, bisulfite treatment, and others; the results were comparable to those obtained with commercial kits. We believe that this protocol could be applied to a broad range of plant species, help avoid technical and sampling biases, and facilitate several RNA- and DNA-dependent analyses. PMID:26782533

  10. Effects of aqueous leaf extract of Asystasia gangetica on the blood pressure and heart rate in male spontaneously hypertensive Wistar rats

    PubMed Central

    2013-01-01

    Background Asystasia gangentica (A. gangetica) belongs to the family Acanthaceae. It is used to treat hypertension, rheumatism, asthma, diabetes mellitus, and as an anthelmintic in South Africa, India, Cameroun, Nigeria, and Kenya respectively. It has also been reported to inhibit the angiotensin I converting enzyme (ACE) in-vitro. Therefore, the aim of this study is to investigate the in-vivo effect of aqueous leaf extract (ALE) of A. gangetica on the blood pressure (BP) and heart rate (HR) in anaesthetized male spontaneously hypertensive rats (SHR); and to elucidate possible mechanism(s) by which it acts. Methods The ALE of A. gangetica (10–400 mg/kg), angiotensin I human acetate salt hydrate (ANG I, 3.1–100 μg/kg) and angiotensin II human (ANG II, 3.1–50 μg/kg) were administered intravenously. The BP and HR were measured via a pressure transducer connecting the femoral artery to a Powerlab and a computer for recording. Results A. gangetica significantly (p<0.05), and dose-dependently reduced the systolic, diastolic, and mean arterial BP. The significant (p<0.05) reductions in HR were not dose-dependent. Both ANG I and ANG II increased the BP dose-dependently. Co-infusion of A. gangetica (200 mg/kg) with either ANG I or ANG II significantly (p<0.05) suppressed the hypertensive effect of both ANG I and ANG II respectively, and was associated with reductions in HR. Conclusions A. gangetica ALE reduced BP and HR in the SHR. The reduction in BP may be a result of actions of the ALE on the ACE, the ANG II receptors and the heart rate. PMID:24160568

  11. Estrogenic and Progestagenic effects of extracts of Justicia pectoralis Jacq., an herbal medicine from Costa Rica used for the treatment of Menopause and PMS

    PubMed Central

    Locklear, Tracie D.; Huang, Yue; Frasor, Jonna; Doyle, Brian J.; Perez, Alice; Gomez-Laurito, Jorge; Mahady, Gail. B.

    2010-01-01

    Objectives To investigate the biological activities of Justicia pectoralis Jacq. (Acanthaceae), an herbal medicine used in Costa Rica (CR) for the management of menopausal symptoms and dysmenorrhea. Study design The aerial parts of Justicia pectoralis were collected, dried and extracted in methanol. To establish possible mechanisms of action of JP for the treatment of menopausal symptoms, the estrogenic and progesterone agonist, and antiinflammatory activities were investigated. Main outcome measures The methanol extract (JP-M) was tested in ER and PR binding assays, a COX-2 enzyme inhibition assay, the ERβ-CALUX assay in U2-OS cells, as well as reporter and endogenous gene assays in MCF-7 K1 cells. Results The JP-M extract inhibited COX-2 catalytic activity (IC50 4.8µg/ml); bound to both ERα and ERβ (IC50 50 µg/ml and 23.1µg/ml, respectively); induced estrogen-dependent transcription in the ERβ-CALUX; and bound to the progesterone receptor (IC50 22.8 µg/ml). The extract also modulated the expression of endogenous estrogen responsive genes pS2, PR, and PTGES in MCF-7 cells at a concentration of 20 µg/ml. Activation of a 2 ERE-construct in transiently transfected MCF-7 cells by the extract was inhibited by the estrogen receptor antagonist ICI 182,780, indicating that the effects were mediated through the estrogen receptor. Finally, the extract weakly enhanced the proliferation of MCF-7 cells, however this was not statistically significant as compared with DMSO controls. Conclusions Extracts of J. pectoralis have estrogenic, progestagenic and anti-inflammatory effects, and thus have a plausible mechanism of action, explaining its traditional use for menopause and PMS. PMID:20452152

  12. Structure of the herb stratum under different light regimes in the Submontane Atlantic Rain Forest.

    PubMed

    Lima, R A F; Gandolfi, S

    2009-05-01

    This study aimed to characterize the structure of the herb stratum in relation to light availability in the Submontane Atlantic Rain Forest at the Carlos Botelho State Park, SP, Brazil. Fortyone 10 x10 m plots were established under the closed canopy (18 plots), small and medium canopy gaps (11) and large canopy gaps dominated by Guadua tagoara (Ness) Kunth (12). Inside each plot, the line intercept method was applied to assess soil coverage as an estimate of density of herb stratum vegetation. Hemispherical photographs were taken at the centre of the plots to evaluate the annual light regime. Overall, Calathea communis Wanderley and S. Vieira had the greater mean coverage, followed by woody seedlings, ground ferns and other herbs (mainly, Araceae, Acanthaceae, Amaranthaceae and Cyperaceae). There were strong correlations among several groups of the herb stratum, such as the negative correlations between woody seedlings with the coverage of C. communis and with rocks. The analysis of the hemispherical photographs confirmed the difference among environments that led to significant differences in the soil coverage of the herb stratum vegetation but woody seedlings. For instance, C. communis showed great coverage in large gaps while ferns were more abundant in small and medium gaps and in the understorey. Other herbs, in turn, demonstrated bigger soil coverage in small and medium gaps. Although this study represents a rough assessment of the structure and composition of the herb stratum, the results found here illustrated the evident relation between herb species density and the environmental variation promoted by changes on canopy structure and topography. PMID:19675929

  13. Andrographolide and its analogues: versatile bioactive molecules for combating inflammation and cancer.

    PubMed

    Lim, Jonathan Chee Woei; Chan, Tze Khee; Ng, David S W; Sagineedu, Sreenivasa R; Stanslas, Johnson; Wong, W S Fred

    2012-03-01

    1. Andrographis paniculata (Burm. f) Nees, commonly known as 'king of bitters', is a herbaceous plant belonging to the Family Acanthaceae. It has been widely used for centuries in Asian countries like China, India, Thailand and Malaysia for the treatment of sore throat, flu and upper respiratory tract infections. 2. Andrographolide, 14-deoxy-11,12-didehydroandrographolide and neoandrographolide are examples of the major labdane diterpenoids isolated from A. paniculata. These bioactive molecules have exhibited varying degrees of anti-inflammatory and anticancer activities in both in vitro and in vivo experimental models of inflammation and cancer. 3. Extensive libraries of andrographolide analogues have been synthesised mainly by modifying the α,β-unsaturated γ-butyrolactone moiety, the two double bonds Δ(8,(17)) and Δ(12,(13)) and the three hydroxyls at C-3 (secondary), C-14 (allylic) and C-19 (primary). Many of these synthetic analogues exhibit superior anticancer activity over the naturally occurring andrographolides. 4. Andrographolide and its derivatives have been shown to have anti-inflammatory effects in experimental models of asthma, stroke and arthritis, as well as in patients with upper respiratory tract infections. Andrographolide reduces the production of cytokines, chemokines, adhesion molecules, nitric oxide and lipid mediators, probably via inhibition of the nuclear factor (NF)-κB signalling pathway. 5. The anticancer mechanisms for andrographolide include inhibition of Janus tyrosine kinases-signal transducers and activators of transcription, phosphatidylinositol 3-kinase and NF-κB signalling pathways, suppression of heat shock protein 90, cyclins and cyclin-dependent kinases, metalloproteinases and growth factors, and the induction of tumour suppressor proteins p53 and p21, leading to inhibition of cancer cell proliferation, survival, metastasis and angiogenesis. 6. Andrographolide drug discovery is a promising strategy for the development of a novel class of anti-inflammatory and anticancer drugs. PMID:22017767

  14. Floristic composition and vegetation analysis in Hail region north of central Saudi Arabia

    PubMed Central

    El-Ghanim, Wafaa M.; Hassan, Loutfy M.; Galal, Tarek M.; Badr, Abdelfattah

    2010-01-01

    In this study, 19 sites representing different habitats in Hail region were regularly visited for two years, in each site 2–5 stands were selected for investigating floristic composition and vegetation types in the area. A total of 124 species representing 34 families were recorded. The family Asteraceae is represented by the highest number of species (21 species) followed by the Poaceae (17 species) and the Brassicaceae (10 species) whereas, 15 families including Acanthaceae, Convolvulaceae, Moraceae, Nyctaginaceae and Primulaceae, are represented by a single species each. Chronological analysis of the vegetation in the area revealed the domination of Saharo-Sindian elements in the wild vegetations and of weedy species in the cultivated plots. Therophytes and chamaephytes are the dominating life forms of the vegetation spectra; therophytes represent 49.20% and chamaephytes represent 29.00% of the total species in the study area. Application of TWINISPAN and DECORANA classification and ordination techniques to the data produced seven vegetation groups. Ruderal habitats comprised two small groups A and F dominated by Phragmites australis and Imperata cylindrical (A), Euphorbia peplus and Sisymbrium irio (F), respectively. Two vegetation groups (B and G) have been recognized in the mountains and slopes dominated by Launaea mucronata, Trigonella stellata (B) and Ficus palmate and Fagonia bruguieri (G). Other two groups (C and E) inhabit the desert and mountainous wadies; these are represented by Gymnocarpos decandrus and Ochradenus baccatus (C) and Senecio glaucus subsp. coronopifolius and Rumex equisetiforme (E). On the other hand, one group (D) inhabits the cultivated plots and is represented by Plantago albicans and Rumex vesicarius, the last group also includes species restricted to the sand dune habitat of the Al-Nafud desert north of Hail city and represented by Calligonum polygonoides and Halyxolon salicornicum. The vegetation analysis indicated the invasion of Hail Flora by some foreign weeds such as Solanum nigrum, Lactuca serriola and Amaranthus lividus. The presence of these weeds points out the need to monitor the vegetation change in Hail region, and also other regions of Saudi Arabia, in order to elucidate the human impact on the wild plants diversity as human activities change with the fast development in the kingdom. PMID:23961067

  15. Quantitative mapping of elemental distribution in leaves of the metallophytes Helichrysum candolleanum, Blepharis aspera, and Blepharis diversispina from Selkirk Cu-Ni mine, Botswana

    NASA Astrophysics Data System (ADS)

    Koosaletse-Mswela, Pulane; Przybyłowicz, Wojciech J.; Cloete, Karen J.; Barnabas, Alban D.; Torto, Nelson; Mesjasz-Przybyłowicz, Jolanta

    2015-11-01

    Multi-element profiling is essential in understanding the metal-tolerant behavior of metallophytes. Although previous reports using multi-elemental analyses show that the metallophytes Blepharis aspera, Blepharis diversispina (Acanthaceae) and Helichrysum candolleanum (Asteraceae) take up metals, no information exists on elemental spatial distribution and concentrations in specific tissues of these plants. The aim of this study therefore was to assess the spatial distribution and concentration of copper, nickel and other elements in leaf tissues of these plants using micro-PIXE. Whole plants were collected with soil in pots from an operational copper and nickel mine (i.e., a copper and nickel mineralized area), Selkirk, about 40 km north-east of Francistown, Botswana. On the same day the samples were transported by air to iThemba LABS in South Africa. Leaf specimens were cryofixed in liquid propane cooled by LN2. Parallel samples were embedded in resin for anatomical studies to facilitate interpretation of elemental maps. The distribution and concentration of copper, nickel, and other elements in leaf tissues were determined using micro-PIXE and proton backscattering spectrometry. Data evaluation was performed using GeoPIXE II software. Micro-PIXE showed that H. candolleanum had the highest whole leaf content of copper (70 ± 3 μg g-1 DW) and nickel (168 ± 5 μg g-1 DW), followed by B. aspera (Cu: 25 ± 1 μg g-1 DW; Ni: 166 ± 4 μg g-1 DW) and B. diversispina (Cu: 3 ± 1 μg g-1 DW; Ni, below detection limit). For specific leaf tissues, the highest levels of copper were found in the vascular bundle for H. candolleanum (167 ± 7 μg g-1 DW) and the lower epidermis for B. aspera (70 ± 9 μg g-1 DW). The highest levels of nickel were present in the vascular bundle of B. aspera (479 ± 10 μg g-1 DW) and H. candolleanum (90 ± 5 μg g-1 DW). Elemental maps showed a similar distribution pattern for copper and nickel in B. aspera and B diversispina, with these elements concentrated in the upper and lower epidermal regions. However, for H. candolleanum, both copper and nickel were concentrated in the mesophyll. The difference in concentration and accumulation patterns between B. aspera, B. diversispina and H. candolleanum suggests that the metal-tolerant adaptation of these metallophytes may differ.

  16. High-resolution vegetation dynamics reconstitution in the Zaire/Congo watershed since MIS 6

    NASA Astrophysics Data System (ADS)

    Dalibard, Mathieu; Popescu, Speranta-Maria; Maley, Jean; Pittet, Bernard; Marsset, Tania; Baudin, François; Dennielou, Bernard; Sionneau, Thomas; Escarguel, Gilles; Droz, Laurence

    2010-05-01

    The present-day latitudinal migrations of the Intertropical Convergence Zone (ITCZ) are controlled by ocean/atmosphere dynamics impact seasonality of monsoon influence on the intertropical eastern Atlantic and western Africa. The geographical position of the Zaire/Congo drainage basin spanning the Northern and Southern hemispheres makes it a key area to study variation of the climatic parameters (temperature and monsoon activity) through time. To identify the ITCZ variability during the last 180 ka, a multiproxy analysis (pollen grains, elemental ratio derived from XRF analysis, organic matter content, clay mineralogy) was performed on the core KZAI-02, drilled offshore Angola at 3418 m water depth. Pollen record indicates a very high plant diversity (327 taxa representative of 106 families). They have been grouped as follow with respect to their ecological requirements: (1) mangrove, (2) rain forest, (3) warm-temperate forest, (4) pioneer forest, (5) afromontane forest, (6) savannah, (7) marshes. The relative fluctuation of these ecological groups during the last 180 ka allows us to reconstruct the dynamics of vegetation and its response to global climate forcing. Generally the glacial periods are characterized by the development of the afromontane forest (mainly Podocarpus) on reliefs while in lower altitudes the savannah (Fabaceae Papilionoidae, Poaceae, Zygophyllum, etc.) spreads in response to the relative precipitation decrease. During interglacials our records indicate a progressive development of forest environments, the pioneer forest (Alchornea, Bridelia, Cnestis, etc.) being progressively replaced by the tropical rain forest (Acanthaceae, Fabaceae Caesalpinoideae, Sapotaceae, etc.). This evolution indicates an increase in temperature and humidity. At the stadial/interglacial transitions the development of the mangrove (Rhizophoraceae, Avicenia, Sonneratia, etc.) seems to respond principally to sea level rise. The maximum extension of Cyperaceae marshes contemporaneously with a significant presence of afromontane forest in MIS 6 may be correlated with rainfall increase probably related to changes in the monsoon activity. The information in term of humidity obtained from some other proxies (clay mineralogy, organic carbon, and elemental ratio measured by XRF, such as Br, etc.) shows a similar trend with the pollen record. A spectral analysis has been performed and reveals that the reconstructed climatic parameters from the Zaire/Congo watershed correlated with Milankovitch cycles, including semi-precession cycles (10 kyrs) characteristic of the Equatorial zone.

  17. La Realidad de la Adquisicion del Lenguaje Oral y Escrito en una Muestra de Escuelas del Sector sur de Santiago. [The Reality of the Acquisition of Oral and Written Language in a Sample of Schools in the Southern Part of Santiago.

    ERIC Educational Resources Information Center

    Oyarce, Carmen Diaz; Mujica, Elena Alvarez-Salamanca

    2001-01-01

    Investigated reading and writing skills of socioeconomically deprived first graders in Santiago, Chile. Found that the children had low achievement in reading and writing and at the end of the school year had not acquired sufficient linguistic competence to successfully master these skills. Also found a dissociation between observed practice and…

  18. For a Child, Life is a Creative Adventure: Supporting Development and Learning through Art, Music, Movement, and Dialogue. A Guide for Parents and Professionals. = Para los ninos, la vida es una aventura creativa: Como estimular el desarrollo y el aprendizaje por medio de las artes visuales, la musica, el movimiento y el dialogo. Guia para padres de familia y profesionales.

    ERIC Educational Resources Information Center

    Cohen, Elena

    Recognizing that creativity facilitates children's learning and development, the Head Start Program Performance Standards require Head Start programs to include opportunities for creative self-expression. This guide with accompanying videotape, both in English- and Spanish- language versions, encourages and assists adults to support children's…

  19. Human Relations Activities for the Single Parent To Develop More Effective Parent/Child Relations. Bilingual Guide = Actividades sobre relaciones humanas para ayudar al padre-soltero o madre-soltera a desarrollar una relacion efectiva entre padre e hijo Guia bilingue.

    ERIC Educational Resources Information Center

    Peterson, Susan

    Written in English and Spanish, this bilingual guide offers 10 activities which single parents can use to improve their relationships with their children. Objectives of activities include: (1) developing children's responsibility for work tasks in the home; (2) improving sibling relationships; (3) discussing emergencies with children; (4)

  20. Experiencias interculturales y la pedagogia de la anglofonia en la ensenanza de ingles como lengua extranjera (EILE) desde una perspectiva deweyana. Working Paper (A Deweyan Perspective on Cross-Cultural Experiences and Anglophone Pedagogy in the Teaching of English as a Foreign Language. Working Paper).

    ERIC Educational Resources Information Center

    Zoreda, Margaret Lee

    This paper discusses a framework for teaching English as a foreign language that incorporates significant cultural content and fosters critical encounters with Anglophone culture. It reviews relevant contemporary perspectives for understanding cross-cultural processes within the foreign language teaching environment with emphasis on the issue of…

  1. Una guia para los padres sobre lo mas importante: el logro academico plan de educacion de Maryland desde preescolar hasta el 12 grado, 2002-2003. (A Parent's Guide to Achievement Matters Most: Maryland's Plan for PreK-12 Education, 2002-2003).

    ERIC Educational Resources Information Center

    Maryland State Dept. of Education, Baltimore.

    To raise the achievement of every student in the state, Maryland implemented "Achievement Matters Most," a new plan for public elementary and secondary schools that sets goals in the areas of achievement, teaching, testing, safety, and family involvement in schools. This Spanish-language guide for parents outlines the goals and characteristics of…

  2. Hacer lo mejor de la educacion de su nino: Una Guia para padres. Preparado para el Proyecto para la Movilizacion de la Communidad Hispana para la Provencion de la Desercion Escolar. (Making the Most of Your Child's Education: A Guide to Parents. Prepared for the ASPIRA Hispanic Community Mobilization for Dropout Prevention Project).

    ERIC Educational Resources Information Center

    Pell, Elena; And Others

    This guide, in Spanish, offers practical advice to Latino parents on how to help their children succeed academically. Chapter 1, "About This Booklet," discusses the importance of parent involvement in a child's education and development and reviews the format of the five other chapters. Chapter 2, "What Is Parent Involvement, and Why Should I Get…

  3. How Do EFL Student Teachers Face the Challenge of Using L2 in Public School Classrooms? (¿Cómo enfrentan los docentes practicantes de inglés como lengua extranjera el reto de usar una segunda lengua en las aulas de clase de la escuela pública?)

    ERIC Educational Resources Information Center

    Viáfara, John Jairo

    2011-01-01

    As an EFL Student teachers' advisor, I had constantly perceived that they regarded using the target language with their pupils inside their classroom as a challenge. That is why I became interested in investigating how thirteen student teachers in Tunja public schools faced this issue. While participants were involved in a reflective teaching…

  4. Teacher Activities and Adolescent Students' Participation in a Colombian EFL Classroom (Actividades de enseñanza y participación de estudiantes adolescentes en una clase de enseñanza de inglés como lengua extranjera en Colombia)

    ERIC Educational Resources Information Center

    Caicedo, Jefferson

    2015-01-01

    The present study concerns the activities teachers develop and ninth-graders' participation in responses to those activities. The objectives of this study were to identify and describe the types of teaching activities developed and how students respond to them and to show how the target language is used in the classroom. The data collection was…

  5. The Design of a Rubric to Evaluate Laboratory Reports in Astronomy: Academic Literacy in the Disciplines (El diseño de una rúbrica para evaluar informes de laboratorio en Astronomía: la alfabetización académica en las disciplinas)

    ERIC Educational Resources Information Center

    Arancibia Aguilera, María Cristina

    2014-01-01

    A rubric was developed to evaluate laboratory reports written by undergraduate students of astronomy and astrophysics from Universidad Católica de Chile. The process of elaboration, peer validation, and application of the rubric to the evaluation of written tasks extended from August 2011 to August 2012. The instrument proved to be effective as an…

  6. Skype™ Conference Calls: A Way to Promote Speaking Skills in the Teaching and Learning of English (Llamadas para conferencia en Skype™: una forma de promover la habilidad de habla en la enseñanza y aprendizaje del inglés)

    ERIC Educational Resources Information Center

    Romaña Correa, Yeferson

    2015-01-01

    This article presents the results of a research project on the teaching and learning of English through the use of Skype™ conference calls. The research was carried out with a group of 12 English as a foreign language adult learners in the language institute of Universidad Distrital Francisco José de Caldas, Bogotá, Colombia. The findings of this…

  7. An Exploration of EFL Teachers' Awareness of the Sources of Pedagogical Knowledge in a Teacher Education Program (Una exploración del nivel de conciencia de docentes de inglés como lengua extranjera respecto a las fuentes del conocimiento pedagógico en un programa de formación de docentes)

    ERIC Educational Resources Information Center

    Macías, Diego Fernando

    2013-01-01

    This project set out to investigate the extent to which the sources of English as a foreign language teachers' pedagogical knowledge are acknowledged and addressed in a teacher education program in a public university in Colombia. It involved the participation of teacher educators and novice teachers as well as the analysis of documents. This…

  8. Teaching English through Stories: A Meaningful and Fun Way for Children to Learn the Language (La enseñanza del inglés a través de historias: una forma divertida y significativa para que los niños aprendan el idioma)

    ERIC Educational Resources Information Center

    Porras González, Nohora Inés

    2010-01-01

    This article presents the results of a study on utilizing stories for teaching English as a foreign language to children in first, second and third grades. It was carried out in a Colombian public elementary school in Bucaramanga, Colombia. The proposal was initiated by a group of student-teachers at Universidad Cooperativa de Colombia, Seccional…

  9. A Guide for Parents and Families about What Your 1st Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de 1er Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new…

  10. A Guide for Parents and Families about What Your 2nd Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de 2do Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new…

  11. A Guide for Parents and Families about What Your Kindergartner Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de Jardin Infantil (Kindergarten) Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new…

  12. Human Relations Activities for the Single Parent To Develop More Effective Parent/Child Relations. Bilingual Guide = Actividades sobre relaciones humanas para ayudar al padre-soltero o madre-soltera a desarrollar una relacion efectiva entre padre e hijo Guia bilingue.

    ERIC Educational Resources Information Center

    Peterson, Susan

    Written in English and Spanish, this bilingual guide offers 10 activities which single parents can use to improve their relationships with their children. Objectives of activities include: (1) developing children's responsibility for work tasks in the home; (2) improving sibling relationships; (3) discussing emergencies with children; (4)…

  13. Self-Programmed Counseling and Self-Programmed Control Manual. A Guide to Self-Image Development with Emphasis on the Chicano Student. Student's Guide = Manual de Sistema de Consejo Auto Programado y Control Auto Programado. Una Guia Para el Desarrollo de La Imagen Propia Con un Enfasis en el Estudiante Chicano.

    ERIC Educational Resources Information Center

    Mireles, S. Raymond

    Self-Programmed Counseling, the instructor's guidance, and Self-Programmed Control (SPC), the student's response, was initially developed by Title III Project USTED (United Students and Teachers for Educational Development) for Mexican American college students on academic probation to use on a non-credit, special group counseling basis. As part…

  14. Comparing Teaching Styles and Personality Types of EFL Instructors in the Public and Private Sectors (Una comparación de los estilos de enseñanza y los tipos de personalidad de profesores de inglés de los sistemas educativos estatal y privado)

    ERIC Educational Resources Information Center

    Diaz Larenas, Claudio H.; Rodriguez Moran, Andrea Victoria; Poblete Rivera, Karen Jocelyn

    2011-01-01

    This is an exploratory non-experimental research study whose main objective is to compare the teaching styles of a group of thirty teachers of English working in either public or private secondary education in Chile. In order to collect the required data, two instruments were administered to the participants: a teaching style inventory and a…

  15. A Visit to the Library: Activities for Families with Children Ages 3 to 5 [Presented by]"Between the Lions[R]" = Una visita a la biblioteca: Actividades para familias con ninos de 3 a 5 anos [presentado por]"Between the Lions[R]."

    ERIC Educational Resources Information Center

    WGBH-TV, Boston, MA.

    "Between the Lions" is a Public Broadcasting System program promoting literacy for children ages 4 through 7 years combining state-of-the-art puppetry, animation, live action, and music to achieve its mission of helping young children learn to read. This guide, in English- and Spanish-language versions, provides suggestions for parents of 3- to…

  16. La Segmentazione Grafica della Scrittura di una Storia Conosciuta. Uno Studio Descrittivo su 450 Testi di Bambini dai 6 agli 8 Anni (Graphic Segmentation of the Writing of a Familiar Story. A Descriptive Study of 450 Texts of Children from 6 to 8 Years Old).

    ERIC Educational Resources Information Center

    Pontecorvo, Clotilde; Di Eduardo, Roberta

    1995-01-01

    The purpose of this study was to analyze how children in the early grades of elementary school divide words while writing. The subjects were 450 Italian children belonging either to upper-middle-class or lower-middle-class families who were asked to write the familiar story of "Little Red Riding Hood." (CFM)

  17. Minority Languages of the Russian Federation: Perspectives for a Ratification of the European Charter of Regional and Minority Languages. Mercator Working Papers = Las lenguas minoritarias de la Federacion Rusa Perspectivas para una ratificacion de la Carta Europea de las Lenguas Regionales y Minoritarias. Mercator Documentos de trabajo.

    ERIC Educational Resources Information Center

    Vieytez, Eduardo J. Ruiz

    This paper describes the linguistic plurality of the Russian Federation, assessing the impact that the hypothetical ratification of the European Charter of Regional and Minority Languages could have on it. Four sections focus on the following: (1) "Introduction"; (2) "Part 1--The Linguistic Plurality of the Russian Federation": the linguistic

  18. Minority Languages of the Russian Federation: Perspectives for a Ratification of the European Charter of Regional and Minority Languages. Mercator Working Papers = Las lenguas minoritarias de la Federacion Rusa Perspectivas para una ratificacion de la Carta Europea de las Lenguas Regionales y Minoritarias. Mercator Documentos de trabajo.

    ERIC Educational Resources Information Center

    Vieytez, Eduardo J. Ruiz

    This paper describes the linguistic plurality of the Russian Federation, assessing the impact that the hypothetical ratification of the European Charter of Regional and Minority Languages could have on it. Four sections focus on the following: (1) "Introduction"; (2) "Part 1--The Linguistic Plurality of the Russian Federation": the linguistic…

  19. Autobiographies: A Way to Explore Student-Teachers' Beliefs in a Teacher Education Program (Autobiografías: una forma de explorar las creencias de docentes en formación en un programa de Licenciatura en Inglés)

    ERIC Educational Resources Information Center

    Durán Narváez, Norma Constanza; Lastra Ramírez, Sandra Patricia; Morales Vasco, Adriana María

    2013-01-01

    Autobiographies depict with words life stories, personal experiences, and perceptions that allow researchers to deeply understand the way people see life, reflect, and construct meaning out of experiences. This article aims at describing the contributions of autobiographies as valuable resources in qualitative research when exploring people's…

  20. A Reappraising of Cosmography: the Interface Between Astronomical and Geographic Studies. (Breton Title: Releitura do Conceito de Cosmografia: a Interface Entre os Estudos Astronômicos e Geográficos.) Una Relectura del Concepto de Cosmografía: la Interfase Entre los Estudios Astronómicos y Geográficos

    NASA Astrophysics Data System (ADS)

    Azevedo Sobreira, Paulo Henrique

    2012-12-01

    The concept of "Cosmography" is in disuse since the 80s of the last century, but the astronomical themes previously discussed in the school subjects of Geography and Cosmography remain in current textbooks. The use of term "Cosmography" was rescued in this research, and the study of its re-signification prompted the appearance of the term Geographic Cosmography. The Geographic Cosmography is a field of studies of the Geography, whose set of knowledge and skills is predominantly scholar. It studies the interface between terrestrial and celestial knowledge, and assigns a geographic significance to them. It examines human and natural relationships with Sidereal Space and its consequences for society and nature. O conceito de "Cosmografia" está em desuso desde os anos 80 do século XX, mas os temas astronômicos anteriormente abordados nas disciplinas escolares de Cosmografia e de Geografia permanecem nos atuais livros didáticos. O uso do termo "Cosmografia" foi resgatado nesta pesquisa e o estudo de sua ressignificação proporcionou o surgimento do termo Cosmografia Geográfica. A Cosmografia Geográfica é um campo de estudos da Geografia, cujo conjunto de conhecimentos e habilidades é predominantemente escolar. Estuda a interface entre os conhecimentos terrestres e os celestes e lhes atribui significância geográfica. Analisa as relações humanas e naturais com o Espaço Sideral e suas consequências para a sociedade e a natureza.

    Aunque el concepto de "Cosmografía" no se usa desde la década de los '80 del siglo pasado, los temas astronómicos que se enseñaban anteriormente en las asignaturas escolares de Cosmografía y de Geografía permanecen en los actuales libros didácticos. El uso del término "Cosmografía" fue rescatado en esta investigación y el estudio de su resignificación proporcionó el surgimiento del término Cosmografía Geográfica. La Cosmografía Geográfica es un campo de estudio de la Geografía, donde el conjunto de conocimientos y habilidades es predominantemente escolar. Estudia la interfase entre los conocimientos terrestres y los celestes, dándoles un significado geográfico. Analiza las relaciones humanas y naturales con el Espacio Sideral y sus consecuencias para la sociedad y la naturaleza.

  1. Self-Programmed Counseling and Self-Programmed Control Manual. A Guide to Self-Image Development with Emphasis on the Chicano Student. Student's Guide = Manual de Sistema de Consejo Auto Programado y Control Auto Programado. Una Guia Para el Desarrollo de La Imagen Propia Con un Enfasis en el Estudiante Chicano.

    ERIC Educational Resources Information Center

    Mireles, S. Raymond

    Self-Programmed Counseling, the instructor's guidance, and Self-Programmed Control (SPC), the student's response, was initially developed by Title III Project USTED (United Students and Teachers for Educational Development) for Mexican American college students on academic probation to use on a non-credit, special group counseling basis. As part

  2. La Roya naranja de la caña de azúcar, una enfermedad emergente: su impacto y comparación con la roya marrón English Translation: Orange rust of sugarcane, an emerging disease: its impact and comparison to brown rust.

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Sugarcane orange rust, caused by Puccinia kuehnii, was first detected in Florida in 2007, the first for Western Hemisphere. Subsequently, it has spread to the majority of sugarcane producing countries in the hemisphere. Orange rust is distinguished from brown rust its pustule size which is slightl...

  3. Astronomy, Art and Mythology in a Public Elementary School in Itaocara/rj. (Spanish Title: Astronomía, Arte y Mitologia en el Ensino Fundamental en Una Escuela de la Red Estatal en ITAOCARA/RJ.) Astronomia, Arte e Mitologia no Ensino Fundamental em Escola da Rede Estadual em ITAOCARA/RJ

    NASA Astrophysics Data System (ADS)

    Oliveira Bernardes, Adriana; Ramos dos Santos, Arleidimar

    2008-12-01

    Volunteer advisors at Itaocara Astronomy Club Marcos Pontes(CAIMP), in their majority high school students, introduced students at Teotônio Brandão Vilela Elementary School to basic concepts in Astronomy, Physics, and Mythology. Computer Science, Arts, puppetry, and educational videos were used to stimulate students to share their feelings and test their knowledge of the concepts presented. The work done by the volunteers helped boost the student's self-esteem and improved their oral skills by applying their knowledge of Physics and Astronomy in Lab experiments. The main goals of the CAIMP are the possibility of including astronomy in Elementary school curricula and developing an interdisciplinary work involving Astronomy, Arts, and Mythology. Through tests and reports, the students who participated in the Brazilian Astronomy Olympics, showed an increase in their knowldge of the sujects presented during the volunteer work. Durante el curso de un trabajo voluntario con estudiantes de nivel primario (1 º a 4 º grado), los guías de Astronomía miembros del CAIMP (Club de Astronomía de Itaocara "Marcos Puentes"), en su mayoría estudiantes secundarios, desarrollaron un trabajo de introducción a las Ciencias y Astronomía con alumnos del colegio estatal Teotônio Vilela Brandão. A través de talleres de informática, artes, videos educativos y teatro de títeres, los estudiantes pudieron expresar sus conocimientos y emociones frente a las leyendas mitológicas con las que se inició el trabajo de introducción. La labor desarrollada por los guías con los alumnos promovió la integración entre las aulas del colegio haciéndolos participar en actividades con el fin de estimular su expresión verbal y aumentar su autoestima. Trabajando diversas formas de expresión, los alumnos pudieron realizar experimentos y conocer algunos conceptos de Física y Astronomía al mismo tiempo que adquirían autonomía para la libre expresión de sus sentimientos y de los conocimientos recibidos. El trabajo en sí ha mostrado además de la posibilidad de la inclusión de la Astronomía en la Educación Primaria, la posibilidad de un trabajo interdisciplinario en los niveles iniciales incluyendo Astronomía, Arte y Mitología. Los resultados presentados por los estudiantes en las Olimpiadas promovidas en la escuela y por la OBA (Olimpiada Brasilera de Astronomía) permitieron verificar un creciente aprendizaje y estimulo hacia las materias científicas, comprobados por la apropiada expresión de los conceptos adquiridos de astronomía y presentados en evaluaciones o en informes obtenidos de ellos mismos, sus familias y profesores. Desenvolvendo um trabalho voluntário junto aos alunos do ensino fundamental no 1º ciclo (1ª a 4ª série), os monitores de Astronomia membros do CAIMP (Clube de Astronomia de Itaocara Marcos Pontes), que eram em sua maioria alunos do ensino médio, desenvolveram um trabalho de aproximação entre os alunos do Colégio Estadual Teotônio Brandão Vilela e os temas envolvendo Ciências e Astronomia. Através de oficinas de informática, artes, vídeos educativos e teatros de fantoches, os alunos puderam expressar seus conhecimentos e emoções diante das lendas mitológicas com as quais começaram a ter contato. O trabalho desenvolvido pelos monitores junto aos alunos proporcionou a integração entre as turmas do colégio e os levou a participação em atividades de maneira a estimular sua oralidade e aumentar sua auto-estima. Trabalhando várias formas de expressões, os alunos puderam realizar seus experimentos e conhecer alguns conceitos de Física e Astronomia, enquanto adquiriam autonomia para se expressarem de acordo com seus sentimentos e conhecimentos adquiridos. O trabalho em si mostrou além da possibilidade de inserção de Astronomia no Ensino Fundamental, a possibilidade de realização de um trabalho interdisciplinar nas séries iniciais envolvendo Astronomia, Arte e Mitologia. Os resultados apresentados pelos alunos nas Olimpíadas promovidas na escola e pela OBA (Olimpíada Brasileira de Astronomia) possibilitaram a verificação de uma crescente aprendizagem e estímulo ao conhecimento de temas científicos, que foi comprovado diante da apropriação dos conceitos de Astronomia adquiridos e apresentados em resultados como avaliações, ou ainda, diante dos relatos obtidos dos mesmos, suas famílias e professores.

  4. Narrative Research into the Possibilities of Classroom-Generated Stories in English Teacher Education (Una investigación narrativa en torno a las posibilidades de los relatos realizados en clase en la formación del profesorado de inglés)

    ERIC Educational Resources Information Center

    Sarasa, María Cristina

    2015-01-01

    This paper summarizes a narrative inquiry carried out with forty volunteer undergraduate participants attending the course Overall Communication, in the English Teacher Education Program in the School of Humanities of the "Universidad Nacional de Mar del Plata," Argentina. It addresses their family/academic identities and personal…

  5. Educacion Bilingue: Una Declaracion del Plan y Accion que Proponen los Regentes de la Universidad del Estado de Nueva York (Bilingual Education: A Statement of Policy and Proposed Action by the Regents of the University of the State of New York.)

    ERIC Educational Resources Information Center

    New York State Education Dept., Albany.

    The primary goal of the Regents in their bilingual education program is to provide equal educational opportunity for non-English-speaking children through activities capitalizing on their proficiency in their native language and developing competency in English. Two complementary goals are inherent: (1) a vitally needed national resource, the…

  6. Educacion Bilingue: Una Declaraccion del Plan y Accion que Proponen los Regentes de la Universidad del Estado de Nueva York. Bilingual Education: A Statement of Policy and Proposed Action by the Regents of the University of the State of New York. Position Paper No. 16.

    ERIC Educational Resources Information Center

    New York State Education Dept., Albany.

    Large numbers of Puerto Rican and other non-English-speaking students live in school districts throughout New York State. To enable these students to function in an English-speaking society while retaining their own culture, a policy to promote bilingual program planning was established by the Board of Regents of New York State in 1972. In this…

  7. A Guide for Parents and Families about What Your 7th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de Septimo Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  8. A Guide for Parents and Families about What Your 9th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de Noveno Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  9. A Guide for Parents and Families about What Your 5th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de 5to Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  10. A Guide for Parents and Families about What Your 10th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de Decimo Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Education Oversight Committee, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  11. A Visit to the Library: Activities for Families with Children Ages 3 to 5 [Presented by]"Between the Lions[R]" = Una visita a la biblioteca: Actividades para familias con ninos de 3 a 5 anos [presentado por]"Between the Lions[R]."

    ERIC Educational Resources Information Center

    WGBH-TV, Boston, MA.

    "Between the Lions" is a Public Broadcasting System program promoting literacy for children ages 4 through 7 years combining state-of-the-art puppetry, animation, live action, and music to achieve its mission of helping young children learn to read. This guide, in English- and Spanish-language versions, provides suggestions for parents of 3- to

  12. A Guide for Parents and Families about What Your 6th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de 6to Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  13. A Guide for Parents and Families about What Your 11th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de Grado 11 Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  14. A Guide for Parents and Families about What Your 12th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de Grado 12 Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Education Oversight Committee, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  15. A Guide for Parents and Families about What Your 4th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de 4to Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  16. A Guide for Parents and Families about What Your 8th Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de Octavo Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  17. A Guide for Parents and Families about What Your 3rd Grader Should Be Learning in School This Year. Don't Fail Your Children = Una Guia para los Padres y Familias Acerca de Lo Que Su Hijo de 3er Grado Debe Aprender en la Escuela Este Ano. No Le Falle a Sus Hijos.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia.

    This guide, in English- and Spanish-language versions, shares with parents information about the South Carolina Curriculum Standards. The standards outline state requirements for children's learning and what students across the state should be able to do in certain subjects. The guide lists seven key reasons parents should be aware of the new

  18. Indigenous Students' Attitudes towards Learning English through a Virtual Program: A Study in a Colombian Public University (Actitudes de estudiantes indígenas frente al aprendizaje de inglés a través de un programa virtual: un estudio en una universidad pública colombiana)

    ERIC Educational Resources Information Center

    Cuasialpud Canchala, Ruth Elena

    2010-01-01

    This article reports an exploratory study carried out at a public university in Bogotá, Colombia, with two indigenous students who took a level I virtual English-course during the second term of 2008 and the first term of 2009. The aim was to analyse their attitudes towards the learning of English through the virtual modality. Interviews,…

  19. EFL Teenagers' Social Identity Representation in a Virtual Learning Community on Facebook (Representación de la identidad social de los estudiantes adolescentes de inglés como lengua extranjera en una comunidad de aprendizaje virtual en Facebook)

    ERIC Educational Resources Information Center

    Jiménez Guamán, Laura Verónica

    2012-01-01

    In this article I report the findings of a descriptive and interpretative qualitative study carried out in a public school in Bogotá, Colombia. The study aimed at analyzing, describing and exploring teenage students' social identity representation as observed in their participation in a learning community on Facebook. Data were collected from…

  20. Oxygen uptake of overweight and obese children at different stages of a progressive treadmill test: Consumo de oxígeno de niños y niñas con sobrepeso y obesos en los diferentes estadios de una prueba progresiva en un tapiz rodante.

    PubMed

    Meléndez-Ortega, Agustín; Lucy Davis, Catherine; Barbeau, Paule; Boyle, Colleen Ann

    2010-01-01

    INTRODUCTION: Maximal oxygen uptake (VO2 max) is associated with cardiovascular and metabolic risks but it is difficult to assess in obese children. The objective of this study was to develop an equation to estimate VO2 (mL/kg/min) and to check the % of tests that were maximal according to recommended criteria. METHODS: Stress tests were analyzed of 222 subjects (94 male and 128 female with a BMI above the 85 percentile for age and sex), and repeated 4 months later. Mean age was 9.4 ± 1.1 years and weighed 52.4 ± 13.3 kg. Body fat % (40.5 + 6.2) was determined by DXA (Hologic QDR 4500W). The protocol on the treadmill started with a warm up at 2.5 and 3 mph with a slope of 0% and 2%. The speed was kept at 3 mph for all the stages and the slope was increased 2% every 2 minutes. Statistical analysis (descriptive, t-test and ANOVAS 2×2×2) was done with SPSS 15.0. RESULTS: Only 35% of the tests were maximal. The equation calculates was Y = 2.6x + 22.3 (x = protocol stage). Data pre and post treatment were not statistically different DISCUSSION: Increments in VO2 were consistent despite subject diversity (sex, % body fat, physical fitness, treatment). CONCLUSION: To be able to estimate VO2 at the different stages of the test without complex equipment or specialized staff, will facilitate the performance of stress tests on a daily basis. PMID:21218170

  1. Desorden Deficitario de la Atencion. Segunda Edicion. NICHCY Briefing Paper [and] El Desorden Deficitario de la Atencion: Una Bibliografia de Materiales en Ingles y Espanol (Attention Deficit Disorder. Second Edition. NICHCY Briefing Paper [and] Attention Deficit Disorder: A Bibliography of Materials in English and Spanish).

    ERIC Educational Resources Information Center

    Fowler, Mary

    This briefing paper uses a question-and-answer format to provide basic information about children with attention deficit disorder (ADD). Questions address the following concerns: nature and incidence of ADD; causes of ADD; signs of ADD (impulsivity, hyperactivity, disorganization, social skill deficits); the diagnostic ADD assessment; how to…

  2. Trajes espaciales - Duration: 32 seconds.

    NASA Video Gallery

    Un traje espacial es mucho más que un conjunto de prendas que los astronautas usan en los paseos espaciales. En realidad, un traje espacial totalmente equipado es una nave para una persona, formada...

  3. Fotometra de imgenes CCD insuficientemente muestreadas

    NASA Astrophysics Data System (ADS)

    Ostrov, P. G.

    Se enfrenta el problema de la fotometra de imgenes CCD con una escala inadecuada (fwhm menor o igual que el tamao de un pixel) y psf fuertemente variable con la posicin. Se analiza, en particular, la aplicabilidad de una tctica propuesta por Massey, consistente en eliminar las vecinas dbiles (utilizando una psf rudimentaria) para luego efectuar una fotometra de apertura sobre las estrellas brillantes. Se determina, mediante experimentos numricos, la precisin alcanzada mediante esta tcnica.

  4. Acanthus montanus: An experimental evaluation of the antimicrobial, anti-inflammatory and immunological properties of a traditional remedy for furuncles

    PubMed Central

    Okoli, Charles O; Akah, Peter A; Onuoha, Nkemjika J; Okoye, Theophine C; Nwoye, Anthonia C; Nworu, Chukwuemeka S

    2008-01-01

    Background Acanthus montanus (Nees) T. Anderson (Acanthaceae) is a shrub widespread in Africa, the Balkans, Romania, Greece and Eastern Mediterranean. It is used in African traditional medicine for the treatment of urogenital infections, urethral pain, endometritis, urinary disease, cystitis, leucorrhoea, aches and pains. In southeastern Nigeria, the root is popular and acclaimed highly effective in the treatment of furuncles. This study was undertaken to experimentally evaluate the antimicrobial and anti-inflammatory properties of the root extract as well as its effect on phagocytosis and specific cell-mediated immune response which may underlie the usefulness of the roots in treatment of furuncles. Methods The aqueous root extract (obtained by hot water maceration of the root powder) was studied for effects on the growth of clinically isolated strains of Pseudomonas aeruginosa and Staphylococcus aureus. The anti-inflammatory activity was investigated using acute topical edema of the mouse ear induced by xylene, acute paw edema induced by agar in rats, formaldehyde arthritis in rats, vascular permeability induced by acetic acid in mice and heat- and hypotonicity-induced haemolysis of ox red blood cells (RBCs). Also evaluated were the effects on in vivo leukocyte migration induced by agar, phagocytic activity of macrophages on Candida albicans and specific cell-mediated immune responses (delayed type hypersensitivity reaction (DTHR) induced by sheep red blood cell (SRBC)). The acute toxicity and lethality (LD50) in mice and phytochemical constituents of the extract were also determined. Results The extract moderately inhibited the growth of the test organisms and significantly (P < 0.05) inhibited (57%) topical acute edema in the mouse ear. It significantly (P < 0.05) suppressed the development of acute edema of the rat paw in a non-dose-related manner and was not effective in inhibiting the global edematous response to formaldehyde arthritis. It also inhibited vascular permeability induced by acetic acid in mice and the haemolysis of ox RBCs induced by heat- and hypotonicity. The extract increased total leukocyte and neutrophil counts and caused a significant (P < 0.05) dose-related increase in the total number of macrophages at the 800 mg/kg dose. On phagocytic activity, the extract evoked a significant (P < 0.05) increase in the number of macrophages with ingested C. albicans at 800 mg/kg dose, and significantly (P < 0.05) inhibited DTHR in a dose-related manner. Phytochemical tests on the extract revealed an abundant presence of alkaloids and carbohydrates while saponins, glycosides, and terpenoids occurred in trace amounts. Acute toxicity test established an oral and intraperitoneal LD50 greater than 5,000 mg/kg. Conclusion The effectiveness of the root of A. montanus in the treatment of furuncles may largely derive from mobilization of leukocytes to the site of the infection and activation of phagocytic activity as well as suppression of exacerbated immune responses by its constituents. Antimicrobial and anti-inflammatory activities are likely contributory mechanisms. Phytochemical constituents such as alkaloids and carbohydrates may be responsible for these pharmacological activities. PMID:18538006

  5. Late Pleistocene- Holocene Dynamics of a Central Himalayan Glacier using multi-proxy data

    NASA Astrophysics Data System (ADS)

    Bali, R.

    2013-12-01

    Palaeoglacial reconstruction based on geomorphological mapping in the Pindari glacier valley of Central Himalaya has revealed the presence of five glacial stages with decreasing magnitude. The oldest and most extensive stage-I glaciation deposited sediments upto an altitude of 2200 masl. The stage-II glaciations luminescence dated to 25 × 2 ka, has deposits at 3200 masl. Remnants morainic ridges found around 3850 masl and dated to 6 × 1 ka represent the Stage-III glaciations. The sharp crested crescentic moraine extending from around 3650 masl to 3900 masl is attributed to stage-IV glaciation and is dated to 3 × 1 ka. Four sharp crested unconsolidated moraines on the valley floor represent the stage-V. A 435 cm deep Glacio-lacustrine sedimentary deposit from Jeha Gaer, in the vicinity of Pindari Glacier has been analysed using multiproxy data. The palynological and mineral magnetic data aided with 14C and Optically Stimulated Luminescence (OSL) dates suggests that the region has witnessed variability in climatic conditions. The study suggests that this region has experienced at least six major natural climatic changes during the last 7,000 years. The climate for the region has been worked out to be cold and dry during 7 ka BP followed by five different vegetational shifts. The vegetation complex as marked by high conifers associated with broad leaved as well as herbaceous taxa and high magnetic susceptibility suggests the amelioration of climate during 7 ka to 4.9 ka BP. Thereafter, during 4.9 ka to 1.75 ka BP, the climate once again shows cold and drier condition as evidenced by acceleration of alpine herbaceous taxa with gradual decrement of conifers and broad leaved taxa. However, during 1.75 ka to 0.9 ka BP, the climate seems to have become relatively warm and moist (~Medieval Warm Period) as evidenced by the presence of both conifers and broad leaved taxa along with fair amount of Rhododendron. During 0.9 ka to 0.2 ka BP, a drastic climatic change has been witnessed (~Little Ice Age) as evidenced by the relative decline in conifers and broad leaved taxa except Quercus and Rhododendron. The sediments of this zone also show lower values of the magnetic susceptibility. Since the last 300 yr BP onwards, the vegetation complex including conifers, broad leaved taxa along with herbaceous elements along with high magnetic susceptibility indicates warm and moist climatic regime. The presence of cereals (>60μm) along with culture pollen like Tubulifloreae, Acanthaceae, Caryophyllaceae and Polygonaceae also support the high pastoral activity during this phase. Further, the steady presence of both monolete and trilete fern spores suggest an overall warm and moist climatic condition as prevailing presently in and around the study area. It is hereby emphasised that both the palynological and environmental magnetic climatic proxies suggest that in the (central) Himalayan region, the present phase of warming started almost 300 years BP and seems to have been continuing since then. The warming of climate thus seems to have been initiated prior to the beginning of the anthropogenic activity.

  6. Découverte d'une mégafaune holocène à la Toca do Serrote do Artur (aire archéologique de São Raimundo Nonato, Piauî, Brésil). A gruta do Serrote do Artur (área arqueológica de São Raimundo Nonato, Piaúi, Brasil): dataçoes holocênicas para megafáuna de mamíferos

    NASA Astrophysics Data System (ADS)

    Faure, Martine; Guérin, Claude; Parenti, Fabio

    1999-09-01

    The cave of Toca do Serrote do Artur (São Raimundo Nonato Archaeological Area, southeastern Piauí, Brazil) has yielded a Mammalian community constituted of Dasypus septemcinctus, Propraopus cf. sulcatus, Hoplophorus euphractus, Glyptodon clavipes, Conepatus sp., Panthera onca, Equus neogaeus, Dicotyles tajacu, Tayassu pecari, Palaeolama major, Mazama guazoubira, Mazama americana and a large Cervid. In comparison with the Mammalian fauna of the other sites from the same area, such a list shows a comparatively reduced biodiversity together with the presence of rare ( Hoplophorus, Conepatus) or unknown ( Propraopus, Palaeolama major) taxa. Explanation lies in the more recent age of the fossiliferous layers, probably Lower Holocene, as demonstrated by two 14C dating of 8 490 ± 120 BP and 6 890 ± 60 BP of the highest one. Moreover, that fauna shows the late survival of some genera ( Propraopus, Hoplophorus, Glyptodon, Equus, Palaeolama) together with climatic modifications related to the Pleistocene-Holocene transition.

  7. Creativity and Democratic Governance. Adult Learning: A Strategic Choice. Proceedings of the ICAE World Assembly (6th, Ocho Rios, Jamaica, August 9-12, 2001) = Creativite et Gouvernance Democratique. L'apprentissage des Adultes: Un Choix Strategique. Actes de la Assemblee Mondiale du CIEA (6th, Ocho Rios, Jamaique, 9 au 12 aout 2001) = Creatividad y Gobernabilidad Democratica. Educacion de Adultos: Una Eleccion Estrategica. Actas de la Asamblea Mundial del ICAE (6th, Ocho Rios, Jamaica, Agosto 9-12, 2001).

    ERIC Educational Resources Information Center

    Dobson, Stephan, Ed.

    This document contains information from and about a world assembly on creativity and democratic governance in adult learning that was held by the International Council for Adult Education (ICAE) and its partner organizations in the Caribbean. The proceedings begin with English, French, and Spanish translations of the address…

  8. Derechos Educacionales de los Padres: Una Explicacion de los Procedimientos de Seguridad para los Padres de Ninos con Discapacidades. Bajo la Clausula del Acta de Educacion para Individuos con Discapacidades (IDEA) y las Reglas para la Administracion del Acta de Educacion para Ninos Excepcionales (Educational Rights of Parents: An Explanation of Procedural Safeguards Available to Parents of Children with Disabilities. Under Provisions of the Individuals with Disabilities Education Act (IDEA) and the Rules for the Administration of the Exceptional Children's Educational Act [ECEA]).

    ERIC Educational Resources Information Center

    Mountain Plains Regional Resource Center, Des Moines, IA.

    This pamphlet, in Spanish, describes Colorado parents' educational rights under federal and state special education rules and regulations. It addresses: (1) free appropriate public education and termination of services; (2) required prior notice to parents if there is a proposed change or refusal to change a child's special education program; (3)…

  9. Hacer frente - Obtener cuidados médicos de seguimiento

    Cancer.gov

    Información sobre los cuidados médicos de seguimiento después del tratamiento del cáncer. Trata sobre su plan de cuidados de seguimiento, cómo obtener un plan para el bienestar e incluye una guía para una vida saludable.

  10. Perspectives on Official English. The Campaign for English as the Official Language of the USA.

    ERIC Educational Resources Information Center

    Adams, Karen L., Ed.; Brink, Daniel T., Ed.

    Essays on the campaign to establish English as the United States' official language include: "Official Languages and Language Planning" (Richard Ruiz); "Una lingua, una patria?: Is Monolingualism Beneficial or Harmful to a Nation's Unity?" (David F. Marshall and Roseann D. Gonzalez); "Canadian Perspectives on Official English" (Joseph E. Magnet);…

  11. Fatiga (PDQ®)—Versión para profesionales de salud

    Cancer.gov

    Resumen de información revisada por expertos acerca de la fatiga, una afección caracterizada por extremo cansancio e incapacidad para funcionar por la falta de energía, que a menudo se observa como una complicación del cáncer y su tratamiento.

  12. Fatiga (PDQ®)—Versión para pacientes

    Cancer.gov

    Resumen de información revisada por expertos acerca de la fatiga, una afección caracterizada por extremo cansancio e incapacidad para funcionar por la falta de energía, que a menudo se observa como una complicación del cáncer y su tratamiento.

  13. Desafíos de la ingeniería -- El Telescopio Espacial James Webb - Duration: 31 seconds.

    NASA Video Gallery

    Cómo colocas un telescopio del tamaño de una cancha de tenis en un cohete ancho como una camioneta? Este es el tipo de preguntas que la gente de la NASA responde acerca del Telescopio Espacial Jame...

  14. Aprendiendo de los errores del pasado - Duration: 91 seconds.

    NASA Video Gallery

    Fernando Abilleira, analista de trayectoria de la NASA para la Oficina de Exploración de Marte, comenta por qué el aterrizaje de una nave espacial en Marte requiere una precisión increíble y hasta ...

  15. Overactive Thyroid: What You Need to Know

    MedlinePlus

    ... medicinas que contienen yodo, como la amiodarona, una medicina para el corazón • tiene fibrilación auricular, un problema ... que lo trate. Su médico puede prescribirle una medicina llamada betabloqueador que le ayudará a sentirse mejor ...

  16. Cigarrillos de mentol | Smokefree Espaol

    Cancer.gov

    Qu es el mentol? El mentol es una sustancia encontrada naturalmente en las plantas de menta, tales como la menta fresca y la hierbabuena. Deja una sensacin refrescante y se usa frecuentemente para aliviar el dolor y la irritacin leve, y para prevenir infecciones [1].

  17. Cigarrillos de mentol | Smokefree Español

    Cancer.gov

    ¿Qué es el mentol? El mentol es una sustancia encontrada naturalmente en las plantas de menta, tales como la menta fresca y la hierbabuena. Deja una sensación refrescante y se usa frecuentemente para aliviar el dolor y la irritación leve, y para prevenir infecciones [1].

  18. Everybody's Different Nobody's Perfect

    MedlinePlus

    ... traten ni qué edad tengan — eso se llama “DISCAPACIDAD.” Some kids have a disability because their muscles ... have one? ¿Conoces a alguien que tenga una discapacidad? ¿Tienes una tú? Everybody’s different, nobody’s perfect. So ...

  19. PROGRAMA PARA LA VERIFICACION DE LA TECNOLOGIA AMBIENTAL - CULTIVANDO ASOCIACIONES PARA EL INCREMENTO DE LAS SELECCIONES DE TECNOLOGIAS AMBIENTALES A LOS SECTORES PUBLICO Y PRIVADO EN LOS ESTADOS UNIDOS Y EN EL EXTERIOR (EPA/600/F-97/005A)

    EPA Science Inventory

    La meta del ETV es verificar, a travs de una
    evaluacin de informacin objectiva y de calidad, las caracteristicas del desempeo de tecnologas
    comerciales ambientales. As el ETV proporciona a
    los compradores y los licenciadores potenciales una valoracin imparcial y creble d...

  20. Fatiga (PDQ)—Versión para profesionales de salud

    Cancer.gov

    Resumen de información revisada por expertos acerca de la fatiga, una afección caracterizada por extremo cansancio e incapacidad para funcionar por la falta de energía, que a menudo se observa como una complicación del cáncer y su tratamiento.

  1. Asunción Garden

    Colonial style courtyard in Asunción with various ornamentals, including exotic species. Se ven dos ejemplares de Palmera Imperial (especie exótica), una la que está en primer plano, con una orquídea Cattleya sp., dos Cocoteros o Mbocayá (Acrocomia totai). La ...

  2. Glossary of MS Terms

    MedlinePlus

    ... en la experiencia y no en una teoría científica. Encéfalo (Se le conoce comúnmente como cerebro.) Parte ... el día anterior) como conversaciones, contenido de una lectura o programas de televisión. Las personas con deterioro ...

  3. Accidentes en plantas nucleares de electricidad y el riesgo de cáncer

    Cancer.gov

    Hoja informativa acerca de los riesgos del cáncer asociados con accidentes en plantas nucleares de electricidad. Incluye información para pacientes con cáncer que viven en una zona que puede haber sido afectada por un accidente en una planta nuclear.

  4. If Your Child Learns in Two Languages: A Parent's Guide for Improving Educational Opportunities for Children Acquiring English as a Second Language = Si su nino aprende en dos idiomes: Una guia para que las familias sepan como mejorar las oportunidades educativas de los ninos que adquieren el ingles como segunda lengua = Neu lon Ban Hoc Bang Hai Thu Tieng: Chi-nam cua phu-huynh de cai tien co hoi hoc van cua con em dang hoc Anh van nhu sinh ngu thu hai.

    ERIC Educational Resources Information Center

    Zelasko, Nancy; Antunez, Beth

    This guide, in English, Spanish, and Vietnamese, aims to inform parents of students who have learned or are learning English as a Second Language about appropriate approaches for educating children so that they can work with schools to ensure a high quality education for their children. The emphasis is on explaining the laws, schools, and research…

  5. [In Process Citation].

    PubMed

    Valdivielso Cortázar, E; Prieto Martínez, C; Fernández-Urién Sainz, I; Vila Costas, J J; Jiménez Pérez, F J; Guerra Lacunza, A

    2016-01-01

    La pancreatitis autoinmune (PAI) es una patología poco frecuente, aunque con una creciente incidencia en países orientales, si bien esto podría deberse a una mayor tasa de detección. Puede asociarse a otras patologías autoinmunes, y se ha descrito su asociación con la enfermedad sistémica por IgG4. La clínica es variada y el tratamiento habitualmente es médico, mediante corticoides.Se describe un caso clínico diagnosticado.Palabras clave. Pancreatitis autoinmune. IgG4. PMID:27125615

  6. Study Urges Church to Stress Migrant Empowerment, Self Determination.

    ERIC Educational Resources Information Center

    Johnston, Robert L.

    1988-01-01

    Summarizes the findings and recommendations of "Una Vida Dura" ("A Hard Life"), a 1988 study by Charles Kyle and others, that criticizes the services provided to migrant farm workers in Illinois by the Catholic Church. (FMW)

  7. Hey! A Brown Recluse Spider Bit Me!

    MedlinePlus

    ... Crushes What's a Booger? Hey! A Brown Recluse Spider Bit Me! KidsHealth > For Kids > Hey! A Brown ... picó una reclusa parda! What's a Brown Recluse Spider? The brown recluse spider is one of the ...

  8. El estrés y fumar | Smokefree Español

    Cancer.gov

    Muchas personas fuman cuando se sienten estresadas. Una parte importante de dejar de fumar es encontrar maneras de manejar el estrés. Reciba recomendaciones sobre formas de disminuir el estrés en su vida.

  9. Introduzione al Laboratorio di Fisica

    NASA Astrophysics Data System (ADS)

    Ciullo, Giuseppe

    La Fisica (dal greco τὰ ϕυσικὰ: le cose naturali) si pone l'obiettivo di descrivere e prevedere il comportamento dei fenomeni naturali, nonché degli apparati e degli strumenti, che hanno reso e rendono la nostra vita più comoda ed efficiente. Tale obiettivo viene perseguito mediante un'attenta osservazione dei fenomeni, con una conseguente schematizzazione dell'osservazione, per fornire una conoscenza della realtà oggettiva, affidabile, verificabile e condivisibile.

  10. Observacion y anatisis de la varlacton de parametros geofisicos de un pozo ubicado en el piedemonte lIanero

    NASA Astrophysics Data System (ADS)

    Montano Mejia, Felix Humberto

    2001-12-01

    Este articulo presenta el desarrollo de instrumentacion especializada que se diseiio y se puso en funcionamiento con el fin de real izar la observacion y el anal isis de la variacion de parametres geofisicos de un pozo ubicado en el piedemonte llanero. La instrumentacion esta compuesta por una estacion remota para el registro multipararnetro y una estacion local en la cual se analizan los registros bajados de la estacion remota mediante la interrogacion periodica.

  11. La distribución multimodal de cúmulos globulares en la galaxia NGC 1399

    NASA Astrophysics Data System (ADS)

    Forte, J. C.; Ostrov, P. G.

    Se presenta una discusión de las características del diagrama de dos colores para un muestreo de 400 cúmulos globulares asociados con NGC 1399. Los resultados indican la presencia de, por lo menos, tres familias de cúmulos. La naturaleza de una cuarta componente, muy azul, no es clara aunque podría tratarse de cúmulos ``sueltos" asociados con el sistema de Fornax.

  12. Establishment of Lipolexis oregmae (Hymenoptera: Aphidiidae) in a classical biological control program directed against the brown citrus aphid (Homoptera: Aphididae) in Florida

    SciTech Connect

    Persad, A.B.; Hoy, M.A.; Ru Nguyen

    2007-03-15

    The parasitoid Lipolexis oregmae Gahan (introduced as L. scutellaris Mackauer) was imported from Guam, evaluated in quarantine, mass reared, and released into citrus groves in Florida in a classical biological control program directed against the brown citrus aphid, Toxoptera citricida Kirkaldy. Releases of 20,200, 12,100, and 1,260 adults of L. oregmae were made throughout Florida during 2000, 2001, and 2002, respectively. To determine if L. oregmae had successfully established, surveys were conducted throughout the state beginning in the summer of 2001 and continuing through the summer of 2003. Parasitism during 2001 and 2002 was evaluated by holding brown citrus aphids in the laboratory until parasitoid adults emerged. Lipolexis oregmae was found in 10 sites in 7 counties and 4 sites in 3 counties with parasitism rates ranging from 0.7 to 3.3% in 2001 and 2002, respectively. Laboratory tests indicated that high rates of mortality occurred if field-collected parasitized aphids were held in plastic bags, so a molecular assay was used that allowed immature L. oregmae to be detected within aphid hosts immediately after collection. The molecular assay was used in 2003 with the brown citrus aphids and with other aphid species collected from citrus, weeds, and vegetables near former release sites; immatures of L. oregmae were detected in black citrus aphids, cowpea aphids, spirea aphids, and melon aphids, as well as in the brown citrus aphid, in 4 of 8 counties sampled, with parasitism ranging from 2.0 to 12.9%, indicating that L. oregmae is established and widely distributed. Samples taken in Polk County during Oct 2005 indicated that L. oregmae has persisted. The ability of L. oregmae to parasitize other aphid species on citrus, and aphids on other host plants, enhances the ability of L. oregmae to persist when brown citrus aphid populations are low. (author) [Spanish] El parasitoide Lipolexis oregmae Gahan (introducido como L. scutellaris Mackauer) fue importado de Guam, evaluado en cuarentena, criado en masa y liberado en huertos de citricos en un programa de control biologico clasico dirigido contra el afido pardo de citricos, Toxoptera citricida Kirkaldy. Se hicieron liberaciones de 20,200, 12,100, y 1,260 adultos de L. oregmae a traves de la Florida durante los anos de 2000, 2001, y 2002, respectivamente. Para determinar si L. oregmae ha logrado en establecer, se realizaron sondeos a traves del estado empezando en el verano del 2001 y continuando hasta el final del verano del 2003. El parasitismo durante 2001 y 2002 fue evaluado con el mantenimiento de individuos del afido pardo de los citricos en el laboratorio hasta que los adultos emergieron. Lipolexis oregmae fue encontrado en 10 sitios en 7 condados y con tasas de parasitismo en 4 sitios en 3 condados entre 0.7 a 3.3% en el 2001 y 2002, respectivamente. Las pruebas del laboratorio indicaron que las tasas altas de mortalidad fueron posibles si los afidos con parasitos recolectados en el campo fueron mantenidos en bolsas plasticas, entonces un ensayo molecular fue usado con lo que permitio la deteccion de inmaduros de L. oregmae dentro de los hospederos de afidos inmediatamente despues de la recoleccion. El ensayo molecular fue usado en el 2003 con individuos del afido pardo de los citricos y con otras especies de afidos recolectados sobre citricos, malezas y hortalizas cerca de los sitios donde los parasitoides fueron liberados anteriormente; inmaduros de L. oregmae fueron detectados en individuos del afido negro de los citricos, el afido del caupi, el afido spirea y el afido del melon, ademas del afido pardo de los citricos en 4 de los 8 condados muestreados, con la tasa del parasitismo entre 2.0 a12.9%, indicando que L. oregmae estaba estabecido y ampliamente distribuido. Las muestras tomadas en el Condado de Polk durante octobre del 2005 indicaron que L. oregmae ha persistido. La capacidad de L. oregmae para parasitar otras especies de afidos sobre citricos y otros afidos sobre otras plantas hospederas, incrementa la capacidad de L. oregmae para persistir cuando las poblaciones del afido pardo de los citricos estan bajas. (author)

  13. Estudio del sistema simbiótico AR Pavonis

    NASA Astrophysics Data System (ADS)

    Quiroga, C.; Brandi, E.; Ferrer, O.; García, L.; Barbá, R.

    Se presenta un estudio espectroscópico y polarimétrico de la binaria eclipsante AR Pavonis a partir de observaciones obtenidas con el telescopio de 2.15 m. del CASLEO (San Juan). El estudio de la naturaleza del sistema se realizó a través del análisis de algunos espectros reunidos entre los años 1990 y 1995 y de datos polarimétricos correspondientes al intervalo 1995 y 1997. El análisis espectroscópico indica que AR Pav está compuesta por una gigante roja M3.7 y una componente caliente compacta, con una temperatura mayor a 90000 K y una luminosidad del orden de 500Lsolar. A lo largo del período orbital, las variaciones observadas en flujo y en velocidades radiales, reflejan que las emisiones permitidas se forman en una región que rodea la componente caliente. El estudio de la polarización lineal de AR Pav indica que además de una componente interestelar, existe una componente intrínseca del sistema que varía temporalmente y con la longitud de onda de la luz polarizada. El distinto comportamiento del grado de polarización y del ángulo de posición observado en fases diferentes, sugiere que distintos mecanismos pueden estar actuando, dependiendo de la región de scattering observado a lo largo de la línea de la visual.

  14. Analysis of acyclic nucleoside modifications in siRNAs finds sensitivity at position 1 that is restored by 5'-terminal phosphorylation both in vitro and in vivo.

    PubMed

    Kenski, Denise M; Cooper, Abby J; Li, Jenny J; Willingham, Aarron T; Haringsma, Henry J; Young, Tracy A; Kuklin, Nelly A; Jones, Jeffrey J; Cancilla, Mark T; McMasters, Daniel R; Mathur, Melina; Sachs, Alan B; Flanagan, W Michael

    2010-01-01

    Small interfering RNAs (siRNAs) are short, double-stranded RNAs that use the endogenous RNAi pathway to mediate gene silencing. Phosphorylation facilitates loading of a siRNA into the Ago2 complex and subsequent cleavage of the target mRNA. In this study, 2', 3' seco nucleoside modifications, which contain an acylic ribose ring and are commonly called unlocked nucleic acids (UNAs), were evaluated at all positions along the guide strand of a siRNA targeting apolipoprotein B (ApoB). UNA modifications at positions 1, 2 and 3 were detrimental to siRNA activity. UNAs at positions 1 and 2 prevented phosphorylation by Clp1 kinase, abrogated binding to Ago2, and impaired Ago2-mediated cleavage of the mRNA target. The addition of a 5'-terminal phosphate to siRNA containing a position 1 UNA restored ApoB mRNA silencing, Ago2 binding, and Ago2 mediated cleavage activity. Position 1 UNA modified siRNA containing a 5'-terminal phosphate exhibited a partial restoration of siRNA silencing activity in vivo. These data reveal the complexity of interpreting the effects of chemical modification on siRNA activity, and exemplify the importance of using multiple biochemical, cell-based and in vivo assays to rationally design chemically modified siRNA destined for therapeutic use. PMID:19917641

  15. Telescopio Solar en Hα (HASTA)

    NASA Astrophysics Data System (ADS)

    Fernández Borda, R.; Francile, C.; Bagala, G.; Bauer, O.; Haerendel, G.; Rieger, E.; Rovira, M.

    El Telescopio Solar en Hα (Hα Solar Telescope for Argentina (-HASTA-) fue recientemente instalado en la Estación Astronómica de Altura Carlos Ulrrico Cesco (OAFA) en El Leoncito. Este instrumento estudiará la evolución de las fulguraciones solares desde tierra con alta resolución temporal y espacial. HASTA es un telescopio refractor de 110 mm con una distancia focal de 165 cm, un filtro Lyot sintonizable (±1Å) con un ancho de banda de 0.3 Å y una cámara CCD de alta resolución (1280×1024 pixels). Todo el conjunto es controlado en forma remota por una PC, la cual además adquiere datos del Sistema de Posicionamiento Global (GPS) y de la estación meteorológica. Diseñado para detectar fulguraciones, el instrumento trabaja en dos modos (patrullaje y fulguración) con una resolución espacial de 1.5 arcseg por pixel y una resolución temporal de 2 seg. HASTA comenzó a operar en Mayo de 1998 y, junto con otros tres instrumentos solares, que se están instalando o se instalaron, harán de El Leoncito un polo de observación solar importante en el Hemisferio Sur.

  16. RETOS EN LA INTERVENCIÓN CON ADOLESCENTES PUERTORRIQUEÑOS/AS QUE MANIFIESTAN COMPORTAMIENTO SUICIDA*

    PubMed Central

    Vélez, Yovanska Duarté; Dávila, Paloma Torres; Hernández, Samariz Laboy

    2015-01-01

    Presentamos un estudio de caso de una adolescente puertorriqueña con comportamiento suicida. Esta comenzó una Terapia Socio Cognitivo-Conductual para el Comportamiento Suicida (TSCC-CS) de tipo ambulatorio luego de una hospitalización por intento suicida. La TSCC-CS incorpora una perspectiva ecológica y de desarrollo a la terapia cognitivo-conductual. Inicialmente mostró baja autoestima y severos síntomas depresivos y de ansiedad. Al finalizar el tratamiento, manifestó un cambio significativo en su sintomatología clínica y evidenció una mejoría en sus destrezas de manejo. No presentó ideas suicidas durante meses previos, ni durante el seguimiento. El análisis de este caso permitió realizar cambios en el protocolo de tratamiento, particularmente en las sesiones de familia y de comunicación con el fin de aumentar la viabilidad del tratamiento. PMID:26702337

  17. Combustión turbulenta de materia nuclear en materia extraña

    NASA Astrophysics Data System (ADS)

    Vucetich, H.

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

  18. Progresos recientes en Astronomía de Rayos Gamma

    NASA Astrophysics Data System (ADS)

    Romero, G. E.

    Tras la exitosa misión del Compton Gamma-Ray Observatory durante los años 1990, la astronomía de rayos gamma ha entrado en una etapa de madurez, convirtiéndose en una de las principales herramientas para el estudio de procesos relativistas en el universo. En este reporte, presentaré una revisión de los principales tópicos abordados a través de estudios con rayos gamma en los últimos años, con particular énfasis en los intentos más recientes por establecer la naturaleza de las fuentes de rayos gamma no identificadas, detectadas por el instrumento EGRET.

  19. Astronomía Mocoví

    NASA Astrophysics Data System (ADS)

    López, A.; Giménez Benitez, S.; Fernández, L.

    El presente trabajo, es una revisión crítica de la astronomía en la cultura Mocoví, aportando a lo realizado previamente por Lehmann Nistche (Lehmann Nistche, 1924 y 1927) el resultado de nuestro trabajo de campo. Un mayor conocimiento de las cosmovisiones de las etnias de esta área es fundamental para una mejor comprensión de la dispersión de las ideas cosmológicas entre los pueblos aborígenes americanos, dada la importancia del corredor chaqueño como conexión entre las altas culturas andinas, la mesopotamia y la región pampeana (Susnik, 1972). Para ello se realiza una comparación con otras cosmovisiones del área americana. Nuestro aporte se enmarca dentro de las actuales líneas de trabajo mundialmente en desarrollo en Astronomía en la Cultura.

  20. [La scuola di psicoterapia post-razionalista oggi: ricerca e pratica clinica].

    PubMed

    De Pascale, Adele; Quiñones, Álvaro; Cimbolli, Paola

    2016-01-01

    RIASSUNTO. La scuola di psicoterapia post-razionalista (approccio cognitivista non classico) ha avuto inizio alla fine degli anni Ottanta con una serie di ipotesi coerenti e scientificamente attendibili. È una scuola che prende l'avvio dalla psicoterapia contemporanea e si sviluppa in aree differenti, offrendo un notevole contributo alla teoria e alla clinica della psicoterapia. Tale scuola ha avuto nel corso degli anni i suoi sviluppi, al pari di tutte le altre scuole di psicoterapia, come pure le stesse difficoltà e capacità di trovare soluzioni. In questo articolo, nostro scopo è quello di illustrare alcune tendenze che non presentano una coerenza epistemologica, teorica e metodologica e non consentono alcuna confutazione, cosa invece fondamentale nelle premesse della scuola iniziata da Vittorio Guidano. Infine, sottolineiamo come sia fondamentale oggi in psicoterapia applicare metodologie coerenti e posizioni concettuali basate sulla ricerca. PMID:27030344

  1. Tiempo para un cambio

    NASA Astrophysics Data System (ADS)

    Woltjer, L.

    1987-06-01

    En la reunion celebrada en diciembre dei ano pasado informe al Consejo de mi deseo de terminar mi contrato como Director General de la ESO una vez que fuera aprobado el proyecto dei VLT, que se espera sucedera hacia fines de este aAo. Cuando fue renovada mi designacion hace tres aAos, el Consejo conocia mi intencion de no completar los cinco aAos dei contrato debido a mi deseo de disponer de mas tiempo para otras actividades. Ahora, una vez terminada la fase preparatoria para el VLT, Y habiendose presentado el proyecto formalmente al Consejo el dia 31 de marzo, y esperando su muy probable aprobacion antes dei termino de este ano, me parece que el 10 de enero de 1988 presenta una excelente fecha para que se produzca un cambio en la administracion de la ESO.

  2. POBREZA Y VULNERABILIDAD EN MÉXICO: EL CASO DE LOS JÓVENES QUE NO ESTUDIAN NI TRABAJAN*

    PubMed Central

    Aguila, Emma; Mejía, Nelly; Pérez, Francisco; Rivera, Alfonso; Ramírez, Edgar

    2015-01-01

    La situación de los jóvenes que no estudian ni trabajan (ninis) se ha vuelto evidente en los últimos años debido a los riesgos que enfrenta dicha población. Este artículo contribuye a la literatura al analizar las características económicas y laborales de los ninis, explora la situación laboral de sus parejas y provee proyecciones al año 2030. Asimismo, propone una clasificación de ninis para focalizar el diseño de políticas públicas, que identifica una tendencia a la baja de éstos debido a las mujeres que acceden al sistema educativo y al mercado laboral y que una mayor proporción de esta población estará compuesta por desempleados. PMID:25918452

  3. Distribución del continuo ultravioleta e infrarrojo en estrellas Be

    NASA Astrophysics Data System (ADS)

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

    Estamos interesados en interpretar los excesos de flujo infrarrojo y/o ultravioleta observados en estrellas Be con respecto al de estrellas B normales, así como su posible correlación. Una envoltura rodeando la estrella distingue una estrella Be de una B normal; para explicar las observaciones es necesario entonces tener en cuenta todos los posibles procesos físicos que en ella tienen lugar. Adoptando un modelo atmosférico específico, hemos estudiado el proceso de recombinación dielectrónica de metales como MgII y FeII, teniendo en cuenta la posible influencia de la opacidad del medio en el flujo emitido.

  4. Errores fotométricos debido al uso del filtro anular de mediana en imágenes CCD

    NASA Astrophysics Data System (ADS)

    Gil-Hutton, R.; Cañada, M.; Noel, N.

    El filtro anular de mediana tiene la importante propiedad de tener una escala claramente definida, lo que permite remover de una imagen CCD todos los objetos con tamaños menores a esta escala, independientemente de su morfología particular, y reemplazarlos por el correspondiente ``background" local. Este filtro es de gran utilidad para remover gradientes de fondo, ``fringing" y halos de objetos extendidos mediante el simple procedimiento de restar a la imagen original una imagen filtrada, repitiendo el proceso las veces que sea necesario. En este trabajo se presentan resultados sobre los errores que introduce este filtro en la fotometría de objetos con diferente relación S/N y su aplicación a imágenes con gradientes de fondo y ``fringing".

  5. Efectos combinados de la ampliación de la atención primaria de salud y de las transferencias condicionadas de dinero en efectivo sobre la mortalidad infantil en Brasil, 1998–2010*

    PubMed Central

    Guanais, Frederico C.

    2015-01-01

    Objetivos. Examiné los efectos combinados del acceso a la atención primaria mediante el Programa de Salud Familiar (PSF) y las transferencias condicionadas de dinero en efectivo del Programa Bolsa Familia (PBF) sobre la mortalidad infantil posneonatal (MIPN) en Brasil. Métodos. Empleé un análisis ecológico longitudinal usando datos en panel de 4 583 municipios brasileños de 1998 al 2010, con 54 253 observaciones en total. Estimé modelos de regresión de efectos fijos por mínimos cuadrados ordinarios, con la tasa de MIPN como la variable dependiente y el PSF, el PBF y sus interacciones como las principales variables independientes de interés. Resultados. La asociación de una mayor cobertura del PSF con una menor tasa de MIPN se volvió más fuerte conforme aumentaba la cobertura del PBF. En los promedios de todas las demás variables, cuando la cobertura de PBF era 25%, la MIPN predicha fue 5,24 (intervalo de confianza [IC] de 95% = 4,95, 5,53) para una cobertura del PSF de 0%, y de 3,54 (IC de 95% = 2,77, 4,31) para una cobertura del PSF de 100%. Cuando la cobertura del PBF era de 60%, la MIPN predicha fue 4,65 (IC de 95% = 4,36, 4,94) para una cobertura del PSF de 0%, y de 1,38 (IC de 95% = 0,88, 1,89) para una cobertura del PSF de 100%. Conclusiones. El efecto del PSF depende de la ampliación del PBF. Para las poblaciones empobrecidas y subatendidas, la combinación de intervenciones tanto del lado de la oferta como del lado de la demanda podría ser necesaria para mejorar los resultados en salud.

  6. Astronomía para ciegos y amblíopes. Proyecto de construcción de un planetario especial en la ciudad de Mar del Plata

    NASA Astrophysics Data System (ADS)

    Musso, S.

    ?`Qué es la Astronomía para Ciegos?. El trabajo es una adaptación en base a la escala de magnitudes de Hipparco que cambia el concepto de luz por una adaptación sonora, donde las estrellas de magnitud 6 se escuchan en 10 dB, más o menos lo que consideramos el umbral de la audición humana. Quienes no escuchan muy bien no pueden escuchar las magnitudes 6, de la misma manera que muchos de nosotros, que no poseemos una visión perfecta, no podemos observar esas mismas estrellas en el cielo (más allá de la polución). A los astros de magnitud 5 vamos a relacionarlos a un sonido en 20 dB. Y así sucesivamente. También los colores estarán representados en una convención de graves a agudos y lo mismo algunas características del cielo. Por ejemplo, la Vía Láctea se mostrará como un ``ruido", como bien nos lo hicieron ver nuestros futuros destinatarios. En Mar del Plata nos encontramos ya trabajando en un proyecto que tiene como objetivo final la construcción del Primer Planetario Acústico del Mundo, una herramienta para la enseñanza de la astronomía, un espacio para la lucha contra la discriminación del discapacitado y una posibilidad de ``ver el cielo de un modo diferente".

  7. La formación de la Nube de Oort y el entorno galáctico primitivo

    NASA Astrophysics Data System (ADS)

    Fernández, J. A.

    Se analizan las condiciones de formación de la nube de Oort en el medio galáctico primitivo, bajo la suposición de que los objetos que alcanzaron la nube fueron planetesimales residuales eyectados por los planetas gigantes durante las etapas finales de su acreción. Los objetos que adquieren órbitas cuasiparabólicas están sujetos a las perturbaciones de estrellas vecinas y al potencial del disco galáctico, las que desacoplan sus perihelios de la región planetaria, dando a los objetos una larga estabilidad dinámica. Se demuestra que un entorno galáctico como el presente pudo, sin embargo, no ser suficiente para formar un reservorio cometario con una vida dinámica comparable a la vida del sistema solar. La existencia de la nube de Oort después de 4600 millones de años es, pues, una fuerte indicación de que el sistema solar se formó en un entorno galáctico mucho mas denso que el presente, tal vez en una nube molecular y/o un cúmulo abierto, que es el modo de producción de la mayoría de las estrellas. Se encuentra que un campo perturbador externo mas intenso, producto de un entorno galáctico mas denso, sería capaz de formar una nube de Oort mas compacta, con un radio del orden de 103- 104 UA. El campo externo mas intenso cesó de actuar una vez que la nube molecular y/o el cúmulo abierto se disiparon, previniendo entonces que ese mismo campo externo disolviera el reservorio cometario.

  8. [ Monotherapy with tamsulosin].

    PubMed

    Sciarra, Alessandro

    2011-01-01

    G.G. è un paziente di 62 anni, in condizioni generali discrete, che giunge alla nostra osservazione per la presenza di sintomi urinari del basso tratto urinario, International Prostate Symptom Score (IPSS) pari a 16. Anamnesi familiare negativa per carcinoma prostatico. Il paziente esegue terapia con calcio antagonista per ipertensione arteriosa. Ha subito un intervento di colecistectomia. Il paziente riferiva inoltre una qualità di vita negativamente influenzata da sintomi minzionali irritativi che lo portavano ad alzarsi più di 3 volte a notte per urinare ed una pollachiuria diurna ogni 3 ore. Viene inoltre riferita un'attività sessuale moderatamente insoddisfacente. PMID:22101552

  9. Anlisis extendido al rojo de espectros estelares

    NASA Astrophysics Data System (ADS)

    Pintado, O. I.; Adelman, S. J.

    En trabajos anteriores hemos estudiado las atmsferas de 8 estrellas de Mercurio-Manganeso (14 Hya, {? Cnc, 28 Her, 3 CenA, HR4487, HR4817, HR7245 y ? Lep) y 7 Sex, usando espectros obtenidos con el espectrgrafo REOSC del CASLEO. Con observaciones realizadas recientemente podemos extender el anlisis hasta los 650 nm. Se muestra que en la regin comprendida entre los 460 y 650 nm hay suficiente cantidad de lneas espectrales como para realizar una muy buena determinacin de abundancias que nos permita obtener una mejor caracterizacin de las estrellas estudiadas.

  10. Trasforiiazioni Termoelastiche Finite di Solidi Incomprimibili

    NASA Astrophysics Data System (ADS)

    Signorini, A.

    Queste lezlioni hanno come direttiva una sintesi di quanto si trova sistematicamente sviluppato in una mia Memoria sulle trasformazioni termoelastiche finite di solidi incomprimibili, in corso di stampa negli Annali di Matematica pura e applicata t. XXXIX ( 1955) pp. 147-201 , Verranno anche esposti, come necessaria premessa, alcuni d ei risultati di due precedenti Memorie degli stessi Annali. Invece, per motivo di brevità, non potrò dare neppure un cenno delle ulteriori ricerche svilup pate dal prof. T. Manacorda in tre recentissimi suoi lavori:

  11. Elaborazione dei dati sperimentali

    NASA Astrophysics Data System (ADS)

    Dapor, M.; Ropele, M.

    L'analisi statistica dei dati sperimentali, la loro elaborazione ed una corretta stima degli errori sono conoscenze necessarie agli studenti di fisica, biologia, chimica, ingegneria e dei corsi di specializzazione tecnico-scientifici in cui a di laboratorio. Chi si occupa di problemi tecnici e di misure, per studio o per lavoro, deve possedere gli strumenti matematici di calcolo e di analisi necessari ad una corretta interpretazione dei dati sperimentali. Il testo fornisce in modo sintetico, chiaro ed esaustivo, tutte le nozioni e le conoscenze utili allo scopo.

  12. Urine sodium excretion increased slightly among U.S. adults between 1988–2010123

    PubMed Central

    Pfeiffer, Christine M.; Hughes, Jeffery P.; Cogswell, Mary E.; Burt, Vicki L.; Lacher, David A.; LaVoie, Donna J.; Rabinowitz, Daniel J.; Johnson, Clifford L.; Pirkle, James L.

    2016-01-01

    Little information is available on temporal trends in sodium intake in the U.S. population using urine sodium excretion as a biomarker. Our aim was to assess 1988–2010 trends in estimated 24-h urine sodium (24hUNa) excretion among U.S. adults (20–59 y) participating in the cross-sectional National Health and Nutrition Examination Survey (NHANES). We used subsamples from a 1988–1994 convenience sample, a 2003–2006 1/3 random sample, and a 2010 1/3 random sample to comply with resource constraints. We estimated 24hUNa excretion from measured sodium concentrations in spot urine samples by use of calibration equations (for men and women) derived from the INTERSALT study. Estimated 24hUNa excretion increased over the 20-y period (1988–1994, 2003–2006, and 2010) [mean ± SEM (n)]: 3160 ± 38.4 mg/d (1249), 3290 ± 29.4 mg/d (1235), and 3290 ± 44.4 mg/d (525), respectively (Ptrend = 0.022). We observed significantly higher mean estimated 24hUNa excretion in each survey period (P <0.001) for men compared to women (31–33%) and for persons with higher body mass index (BMI) (32–35% for obese vs. normal weight) or blood pressure (–26% for hypertensive vs. normal blood pressure). After adjusting for age, sex, and race-ethnicity, temporal trends in mean estimated 24hUNa excretion remained statistically significant (Ptrend = 0.004). We observed no temporal trends in mean estimated 24hUNa excretion among BMI subgroups, nor after adjusting for BMI. While several limitations apply to this analysis (the use of a convenience sample in 1988–1994 and using estimated 24hUNa excretion as a biomarker of sodium intake), these first NHANES data suggest that mean estimated 24hUNa excretion increased slightly in U.S. adults over the last 2 decades and this increase may be explained by a shift in the distribution of BMI. PMID:24623847

  13. Galaxias australes con núcleo doble

    NASA Astrophysics Data System (ADS)

    Gimeno, G.; Díaz, R.; Carranza, G.

    Se estudia una muestra de galaxias australes con núcleo doble a partir de una búsqueda extensiva en la literatura. Se analizan las características morfológicas, fotométricas y espectroscópicas de la muestra. Para algunas galaxias se han realizado observaciones con el espectrógrafo multifunción (EMF) de la Estación Astrofísica de Bosque Alegre a partir de las cuales se determinaron parámetros cinemáticos.

  14. Nuevas oportunidades de inmunoterapia dirigida

    Cancer.gov

    Un equipo de investigadores del NCI ha informado que varios tipos de cánceres gastrointestinales tienen mutaciones específicas al tumor que pueden ser reconocidas por el sistema inmunitario, lo que ofrece una posible oportunidad terapéutica para pacientes

  15. Hacer frente - Para la familia y los amigos

    Cancer.gov

    Si usted ayuda a su familiar o amigo durante el tratamiento del cáncer, usted es quien le cuida. Estar al cuidado de una persona con cáncer puede incluir muchas tensiones. Sugerencias para que se cuide usted cuando cuida a otros.

  16. Combinación de radioterapia con quimioterapia mejora la supervivencia con raro cáncer cerebral

    Cancer.gov

    Los resultados de dos estudios clínicos de seguimiento a largo plazo confirman que ciertos pacientes viven substancialmente más si se les trata con una combinación de quimioterapia y radioterapia en comparación con radioterapia solamente.

  17. Revista Interamericana de Educacion de Adultos, 2003 (Interamerican Review of Adult Education, 2003).

    ERIC Educational Resources Information Center

    Guerra, Alfonso Rangel, Ed.

    2003-01-01

    This journal offers a collection of Spanish-language articles, including: "Educacion a Distancia y Uso de las Tecnologias: Experiencias Desafios y Oportunidades Educativas para Jovenes y Adultos" (Ma. Mercedes Ruiz); "Volver a a Educacion Fundamental? Notas para una Arquelogia de los Mandatos Fundacionales del CREFAL" (Jorge Rivas Diaz); "Una…

  18. Overview of Spanish and Latin American Distance Higher Education.

    ERIC Educational Resources Information Center

    Garcia Garrido, Jose Luis

    1991-01-01

    Provides a brief overview of Spanish and Latin American distance education programs for higher education and describes the three most important institutions: (1) the Spanish UNED (Universidad Nacional de Educacion a Distancia); (2) the Costa Rican UNED (Universidad Estatal a Distancia); and (3) the Venezuelan UNA (Universidad Nacional Abierta).…

  19. Informes de patología

    Cancer.gov

    Hoja informativa que describe el tipo de información que puede aparecer en un informe de patología, el cual contiene los resultados de la examinación visual y microscópica del tejido extirpado durante una biopsia o cirugía.

  20. In Times of Challenge: Chicanos and Chicanas in American Society. Mexican American Studies Monograph Series No. 6.

    ERIC Educational Resources Information Center

    Garcia, Juan R., Ed; And Others

    This anthology compiles articles and essays on Chicano and Chicana political concerns in the 1980's, on cultural aspects of the Chicano experience, and on historical issues and events. The papers are: (1) "Chicano Politics after 1984" by Christine Marie Sierra; (2) "Hacia una Teoria para la Liberacion de la Mujer" (analysis of the relationship of…

  1. Materiales en Marcha para el Esfuerzo Bilingue-Bucultural (Materials on the March for the Promotion of Bilingualism/Biculturalism), December 73.

    ERIC Educational Resources Information Center

    San Diego City Schools, CA.

    This newsletter is designed to promote bilingual/bicultural education. Articles in this issue include: "Una Mejor Comprension de la Cultura Hispanoamericans" ("A Better Understanding of Hispanoamerican Culture"), "Portuguese Science Materials,""Comentario Sobre Materiais Portugueses" ("Commentary on Portuguese Materials"), "Will Foreign Languages…

  2. Energia Renovable para Centros de Salud Rurales (Renewable Energy for Rural Health Clinics)

    SciTech Connect

    Jimenez, T.; Olson, K.

    1999-07-28

    Esta es la primera de una serie de guias de aplicaciones que el Programa de Energia de Villas de NREL esta comisionando para acoplar sistemas comerciales renovables con aplicaciones rurales, incluyendo agua, escuelas rurales y micro empresas. La guia esta complementada por las actividades de desarrollo del Programa de Energia de Villas de NREL, proyectos pilotos internacionales y programas de visitas profesionales.

  3. Hey! A Black Widow Spider Bit Me!

    MedlinePlus

    ... Snowboarding, Skating Crushes What's a Booger? Hey! A Black Widow Spider Bit Me! KidsHealth > For Kids > Hey! ... Me picó una araña viuda negra! What's a Black Widow Spider? The black widow spider is one ...

  4. Biocombustibles - Duration: 31 seconds.

    NASA Video Gallery

    ¿Qué es verde, viscoso y lleno de energía? Las algas, ¡por supuesto! Este biocombustible es apenas una de las muchas energías renovables que estudia la NASA. Los biocombustibles podrían generar y a...

  5. Determinacin de parmetros Post-Newtonianos

    NASA Astrophysics Data System (ADS)

    Orellana, R. B.; Vucetich, H.

    Icaro es un asteroide que, debido a su gran excentricidad, (0.83), puede ser utilizado para verificar la relatividad general. Tiene acercamientos peridicos a la Tierra cada 18 aos aproximadamente. Los ocurridos en 1949 y 1968 permitieron realizar una primera determinacin de la variacin de su perihelio por efectos relativistas. En 1987 tuvo un nuevo acercamiento que permitir mejorar los resultados existentes.

  6. Vacunas contra los virus del papiloma humano

    Cancer.gov

    Una hoja informativa acerca de las vacunas contra los virus del papiloma humano (VPH) para prevenir infecciones con ciertos tipos de VPH, los cuales son la causa principal del cáncer de cuello del útero o cérvix.

  7. Pembrolizumab para carcinoma de células de Merkel

    Cancer.gov

    En un estudio clínico pequeño, más de la mitad de los pacientes con una forma agresiva de cáncer de piel llamada carcinoma de células de Merkel respondieron al fármaco de inmunoterapia pembrolizumab

  8. Capacitación de la fuerza laboral

    Cancer.gov

    El NCI es una organización gubernamental que capacita a la próxima generación de investigadores del cáncer en universidades e instituciones de todo el país y proporciona financiación para investigación científica.

  9. Cuidados paliativos durante el cáncer

    Cancer.gov

    Describe la función de los cuidados paliativos, los cuales son los cuidados que se brindan a pacientes que tienen una enfermedad grave o potencialmente letal, como el cáncer, desde el momento del diagnóstico y durante todo el curso de la enfermedad.

  10. El dolor y el cáncer (PDQ®)—Versión para pacientes

    Cancer.gov

    Resumen de información revisada por expertos acerca del dolor como una complicación a causa del cáncer o su tratamiento. Se discuten enfoques sobre el manejo y tratamiento del dolor relacionado con el cáncer.

  11. Control del cáncer y salud mundial: noticia del Instituto Nacional del Cáncer (NCI)

    Cancer.gov

    En combinación con una reunión de alto nivel de las Naciones Unidas sobre enfermedades no transmisibles en países en vías de desarrollo, el doctor Harold Varmus, director del NCI, y el doctor Ted L. Trimble, del NCI, han publicado un comentario en Science

  12. Informe Anual a la Nación sobre el Estado del Cáncer, 1975 a 2012

    Cancer.gov

    El Informe Anual a la Nación sobre el Estado del Cáncer, 1975 a 2012, es una actualización de los índices de casos nuevos, muertes y tendencias de los cánceres más comunes en los Estados Unidos.

  13. Hacer frente - Supervivencia

    Cancer.gov

    Muchos supervivientes de cáncer dicen que cuando terminó el tratamiento, fue difícil ajustarse a una nueva forma de vida. Entérese de cómo ajustarse a nuevos sentimientos y problemas que aparecen después del tratamiento del cáncer.

  14. Aerodinámica y béisbol - Duration: 32 seconds.

    NASA Video Gallery

    La NASA es conocida por la astronáutica y los aviones, pero ¿también por el Active béisbol? A los investigadores de la NASA les gusta resolver problemas prácticoscomo cuán lejos llegará una bola b...

  15. Los desafíos de tratar con las atmósferas: Entrada, Descenso y Aterrizaje - Duration: 30 seconds.

    NASA Video Gallery

    Ya sea aterrizando en Marte o de regreso a la Tierra, uno de los mayores desafíos de cualquier misión es la entrada, descenso y aterrizaje. Solo piense -- una nave espacial que pasa volando a toda ...

  16. Planes para atender un cáncer avanzado

    Cancer.gov

    Una planificación cuidadosa reducirá el peso que su familia enfrentará más adelante. La planificación puede incluir asuntos económicos y legales, pero puede ser también búsqueda de significado y de celebración de su vida.

  17. Los ojos de la NASA sobre la Tierra - Duration: 97 seconds.

    NASA Video Gallery

    La NASA cuenta con más de una decena de satélites que estudian la Tierra. Conoce la información que recaban los satélites, junto con Gilberto Colón, asistente especial del subdirector del Centro de...

  18. Hacer frente - Los sentimientos y el cáncer

    Cancer.gov

    El cáncer puede causar una amplia gama de sentimientos, ya sea que usted, un amigo o familiar esté en tratamiento ahora o que ya lo haya completado. Sugerencias para superar las muchas emociones causadas por el cáncer.

  19. Estudio de NIH señala relación de la TC en la infancia con leucemia y cáncer de cerebro más tarde

    Cancer.gov

    Niños y adultos jóvenes a quienes se les hicieron exploraciones muchas veces con tomografía computarizada (TC), una herramienta de diagnóstico de uso frecuente, tienen un riesgo ligeramente mayor de padecer leucemia y tumores cerebrales en la década poste

  20. Algunas mujeres con cáncer de seno pueden abstenerse de quimioterapia

    Cancer.gov

    Resumen de resultados del estudio TAILORx indica que mujeres con cáncer de seno receptor de hormonas en estadio inicial tienen un riesgo bajo de recurrencia según una prueba de expresión de 21 genes.

  1. Homogeneity and Entropy

    NASA Astrophysics Data System (ADS)

    Tignanelli, H. L.; Vazquez, R. A.; Mostaccio, C.; Gordillo, S.; Plastino, A.

    1990-11-01

    RESUMEN. Presentamos una metodologia de analisis de la homogeneidad a partir de la Teoria de la Informaci6n, aplicable a muestras de datos observacionales. ABSTRACT:Standard concepts that underlie Information Theory are employed in order design a methodology that enables one to analyze the homogeneity of a given data sample. Key : DATA ANALYSIS

  2. Relationships between salicylic acid content, phenylalanine ammonia-lyase (PAL) activity, and resistance of barley to aphid infestation.

    PubMed

    Chaman, Mercedes E; Copaja, Sylvia V; Argandoña, Victor H

    2003-04-01

    It has been suggested that salicylic acid (SA) is a signal in acquired resistance to pathogens in several plants. Also, it has been suggested that infestation of plants causes an increase in the activity of phenylalanine ammonia-lyase (PAL), a key phenolic biosynthesis enzyme. The purpose of this work was to investigate whether the induction of SA and PAL activity is related to the susceptibility of barley to aphid infestation. The induction of free and conjugated SA in two barley cultivars that differ in susceptibility to aphids was analyzed. Analyses of several physiological parameters showed that cv. UNA-80 was more susceptible to the aphid Schizaphis graminum than cv. LM-109. Salicylic acid was not detected in noninfested plants. Levels of free and conjugated SA in cv. LM-109 and of conjugated SA in cv. UNA-80 increased with aphid infestation, whereas the levels of free SA in cv. UNA-80 remained high under all infestation degrees. Maximum values reached in both cultivars were not significantly different. With respect to PAL activity, cv. LM-109 showed a significantly higher specific activity than cv. UNA-80, the more susceptible cultivar. The relationship between the susceptibility of a plant to aphid and SA induction and PAL activity is discussed. PMID:12670161

  3. Base Lunar Alpha - Duration: 30 seconds.

    NASA Video Gallery

    Tu misión: Recuperar los sistemas críticos cuando un meteoro daña los equipos de supervivencia de tu ambiente lunar. Parece una película de ciencia ficción, ¿verdad? En realidad, es el nuevo juego ...

  4. Primer registro para Peru del genero Nielsonia Young, 1977 (Hemiptera: Cicadellidae: Cicadellinae: Cicadellini)

    Technology Transfer Automated Retrieval System (TEKTRAN)

    En este articulo se reporta por primera vez para el Peru una especies del genero Nielsonia Young, 1977, de material procedente del Departamento de Tumbes. El genero ha sido reportada anteriormente de Ecuador, como unico registro para Sudamerica, y America Central. El unico especimen hembra encontra...

  5. Añadir quimioterapia después de la radioterapia mejora la supervivencia de adultos con un tipo de tu

    Cancer.gov

    Adultos con gliomas de grado bajo, una forma de tumor cerebral, que recibieron tratamiento con quimioterapia después de la radioterapia vivieron más tiempo que pacientes que recibieron solo radioterapia, según los resultados de seguimiento a largo plazo d

  6. Monitoring bird population trends in North America

    USGS Publications Warehouse

    Robbins, C.S.; Bystrak, D.; Geissler, P.H.

    1983-01-01

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

  7. Estudio de NIH indica que la actividad física en tiempo libre alarga la vida tanto como 4,5 años

    Cancer.gov

    La actividad física en tiempo libre está asociada con una expectativa de vida más larga, aun en un grado de actividad relativamente bajo e independientemente del peso corporal, de acuerdo con un estudio llevado a cabo por un equipo de investigadores del I

  8. Complementos de vitamina E aumentan riesgo de cáncer de próstata

    Cancer.gov

    De acuerdo a una revisión ulterior de los datos del Estudio del Selenio y la Vitamina E para Prevenir el Cáncer (SELECT), los hombres que tomaron diariamente 400 unidades internacionales (U.I.) de vitamina E tuvieron más cánceres de próstata que los hombr

  9. Delirio (PDQ®)—Versión para pacientes

    Cancer.gov

    Resumen de información revisada por expertos acerca del delirio como una complicación del cáncer o su tratamiento. Se tratan enfoques de los cuidados médicos de apoyo y los abordajes farmacológicos para el manejo del delirio.

  10. Delirio (PDQ®)—Versión para profesionales de salud

    Cancer.gov

    Resumen de información revisada por expertos acerca del delirio como una complicación a causa del cáncer o su tratamiento. Se discuten los enfoques de los cuidados médicos de apoyo, asi como farmacológicos para el manejo del delirio.

  11. De novo assembly of the mitochondrial genome of Ulva fasciata Delile (Ulvophyceae, Chlorophyta), a distromatic blade-forming green macroalga.

    PubMed

    Melton, James Theodore; Lopez-Bautista, Juan Manuel

    2016-09-01

    We present the 61 614 bp circular-mapping mitochondrial genome of Ulva fasciata. Fifty-eight genes were identified including 29 protein-coding genes, 27 transfer RNA (tRNA) genes, and two ribosomal RNA (rRNA) genes. Four ORFs from the Ulva sp. UNA00071828 mitogenome were conserved compared to the mitogenome of Ulva fasciata. The ∼10 000 bp size difference was mostly due to fewer introns found in U. fasciata mtDNA (4) as compared with the Ulva sp. UNA00071828 mtDNA (10). Introns were annotated in cox1 (3) and nad3 (1). The AT content was similar to Ulva sp. UNA00071828 mtDNA at 67.5%. A phylogenomic anaylsis of 28 chlorophytes and 17 protein-coding genes (14 115 bp alignment) showed that U. fasciata clusters closely with other members of the Ulvophyceae (Ulva sp. UNA00071828, Pseudendoclonium akinetum, and Oltmannsiellopsis viridis). This analysis did not recover a monophyletic Ulvophyceae, however, the Trebouxiophyceae and Chlorophyceae were supported as monophyletic groups. PMID:26369927

  12. Lo que usted necesita saber sobre™ el cáncer de cérvix

    Cancer.gov

    Contiene información sobre las opciones de tratamiento, la obtención de una segunda opinión, los cuidados de seguimiento y las fuentes de apoyo para alguien que ha sido diagnosticado recientemente con cáncer de cérvix o cuello uterino.

  13. Bases para la elaboracion de unidades didacticas de calidad en el area de ciencias (Fisica y Quimica 3 deg ESO)

    NASA Astrophysics Data System (ADS)

    Maccioni, Elena Lucia

    Este Trabajo Fin de Master tiene como objeto, el estudio previo de la educacion de la ciencia en la actualidad y mas destacable, del diseno de las unidades didacticas segun las metodologias mas frecuentes aplicadas por los diferentes sistemas educativos en el area de las Ciencias teniendo en cuenta la importancia y el efecto de la psicologia del alumnado y todo ello como no puede ser de otro modo bajo el corse de la Legislacion aplicable, Estatal, Autonomica y europea. Con estos antecedentes, se extrae cuales son las preguntas que deben contestarse en la elaboracion de una unidad didactica de calidad en el contexto, generacional (edad y sexo), del Proyecto Educativo de Centro, y de la Programacion del Departamento, discutiendo y justificando cada uno de los apartados en que estructuradamente dividiremos dicha Unidad, con un formato manejable, util, y dinamico en el tiempo que sea un verdadero instrumento educativo de aula. Teniendo en cuenta estas premisas, se procede a hacer una recopilacion de una misma unidad didactica publicada por diferentes editoriales, elegidas no al azar, sino en funcion de su penetracion editorial en nuestros centros de ESO, siendo las elegidas (SM y Oxford). Las diferentes unidades seleccionadas son analizadas de forma critica, atendiendo a los criterios generales de calidad bajo parametros cientificos y normativos, concluyendo con la aportacion final que es la redaccion de unas pautas cientifico-pedagogicas, para redactar unidades didacticas de calidad en el area de la Ciencias, en concreto en la Asignatura de Fisica y Quimica de 3º de ESO.

  14. Dinámica de objetos transplutonianos: resultados preliminares

    NASA Astrophysics Data System (ADS)

    Fernández, S.; Brizuela, H.; Roig, F.; Varela, O.

    Se presentan los resultados de una integración numérica de las ecuaciones de movimiento para objetos transplutonianos. Se han calculado los tiempos de Lyapunov para esos objetos y se analiza el comportamiento dinámico de los mismos.

  15. Los mejores ejemplos - Duration: 93 seconds.

    NASA Video Gallery

    El astronauta de la NASA José Hernández nos cuenta cómo cambió su vida cuando oyó en una entrevista radial a Franklin Chang Díaz, el primer astronauta hispano de la NASA. Chang-Díaz contaba sus via...

  16. Operación IceBridge: Explorando la Antártida - Duration: 3 minutes, 4 seconds.

    NASA Video Gallery

    Operación IceBridge es una misión aérea de la NASA dedicada a estudiar cambios en el hielo marino y terrestre en ambos polos del planeta. En octubre y noviembre de 2012, IceBridge completó su cuart...

  17. Asociación de XMRV con enfermedades humanas se debe a contaminación

    Cancer.gov

    Nuevas investigaciones muestran que una asociación, mencionada en numerosos estudios, entre el retrovirus conocido como XMRV y el cáncer de próstata así como el síndrome de fatiga crónica, se debe a contaminación de laboratorio con un virus que se originó en ratones.

  18. Resultado negativo de prueba del VPH es mejor predictor de riesgo bajo de cáncer de cuello uterino

    Cancer.gov

    De acuerdo con un estudio en el que participaron más de un millón de mujeres, los investigadores del NCI han determinado que el resultado negativo de una prueba para la detección del VPH proporciona mayor certeza o seguridad frente a riesgos futuros de cá

  19. Atlas del Genoma del Cáncer: Antecedentes

    Cancer.gov

    El Atlas del Genoma del Cáncer es una iniciativa de los Institutos Nacionales de la Salud (NIH) para crear mapas multidimensionales completos de los cambios genómicos clave en los tipos y subtipos principales de cáncer.

  20. OPERACIÓN IceBridge: Explorando cambios en el hielo de Groenlandia - Duration: 2 minutes, 29 seconds.

    NASA Video Gallery

    Operación IceBridge es una misión aérea de la NASA dedicada a estudiar cambios en la capa de hielo y el hielo marino en ambos polos del planeta. En la primavera de 2012, IceBridge llevó a cabo ...

  1. Good Nutrition Promotes Health: Guide for Parent Nutrition Education.

    ERIC Educational Resources Information Center

    Administration for Children, Youth, and Families (DHHS), Washington, DC. Head Start Bureau.

    The purpose of this manual is to guide users of the nutrition education project produced by Padres Hispanos en Accion por Una Sana Generacion (Hispanic Parents in Action for a Healthy Generation). The project provides nutrition education materials to trainers who provide nutrition counseling to parents of Head Start children. The project has two…

  2. Combinación de fármacos reduce pólipos del duodeno FAP

    Cancer.gov

    En un estudio clínico pequeño de personas con un padecimiento heredado que aumenta en gran medida el riesgo de cáncer gastrointestinal, una combinación de dos fármacos ha mostrado que reduce lesiones precancerosas en el duodeno.

  3. El dolor y el cáncer (PDQ®)—Versión para profesionales de salud

    Cancer.gov

    Resumen de información revisada por expertos acerca del dolor como una complicación a causa del cáncer o su tratamiento. Se discuten enfoques sobre el manejo y tratamiento del dolor relacionado con el cáncer.

  4. órbitas: caos en familia

    NASA Astrophysics Data System (ADS)

    Carpintero, D. D.

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

  5. [Valutazione delle guardie di sicurezza privata attraverso la Suicide Probability Scale e la Brief Symptom Inventory].

    PubMed

    Dogan, Bulent; Canturk, Gurol; Canturk, Nergis; Guney, Sevgi; Özcan, Ebru

    2016-01-01

    RIASSUNTO. Scopo. Lo scopo di questo studio è stato quello di investigare l'influenza della probabilità di suicidio, con le sue caratteristiche sociodemografiche, e di procurare i dati per la prevenzione del suicidio tra le guardie di sicurezza privata che lavorano in condizioni di stress, essendo a contatto ininterrottamente con eventi negativi e traumatici di vita durante il loro lavoro. Metodi. Hanno partecipato allo studio 200 guardie di sicurezza privata e 200 persone dell'Università di Ankara. Per raccogliere i dati sono stati utilizzati un questionario riguardante le condizioni sociodemografiche dei partecipanti, la Suicide Probability Scale (SPS) e la Brief Symptom Inventory (BSI). Risultati. Genere, stato civile, stipendio, credenze religiose, vivere una situazione di pericolo di vita, passato di tentativi di suicidio, fumare e non avere una malattia cronica hanno causato statisticamente una differenza significativa sui punteggi di SPS tra il gruppo di guardie di sicurezza privata e quello di controllo. In aggiunta, c'è stata una correlazione positiva statisticamente significativa tra i punteggi totali delle sottoscale di SPS e quelli di BSI. Conclusioni. Allo stesso modo degli agenti di polizia e dei gendarmi, le guardie di sicurezza privata sono ad alto rischio di commettere e tentare il suicidio trovandosi in condizioni stressanti di lavoro e anche soffrendo del trauma secondario. È necessario che essi siano consapevoli della propria tendenza al suicidio e avere controlli psichiatrici regolari. PMID:27183512

  6. Descompresión microvascular en neuralgia del trigémino: Reporte de 36 casos y revisión de la literatura

    PubMed Central

    Campero, Alvaro; Ajler, Pablo; Campero, Abraham Agustín

    2014-01-01

    Objetivo: El propósito del presente trabajo es presentar los resultados de 36 pacientes con diagnóstico de neuralgia del trigémino (NT), en los cuales se realizó una descompresión microvascular (DMV). Material y Método: Desde junio de 2005 a mayo de 2012, 36 pacientes con diagnóstico de NT fueron operados por el primer autor (AC), realizando una DMV. Se evaluó: Edad, sexo, tiempo de sintomatología previo a la cirugía, hallazgos intraoperatorios (a través de los videos quirúrgicos), y resultados postoperatorios. Resultados: De los 36 pacientes operados, 25 fueron mujeres y 11 varones. El promedio de edad fue de 48 años. El seguimiento postoperatorio fue en promedio de 38 meses. De los 36 pacientes, 32 (88%) evolucionaron sin dolor hasta la fecha. De los 4 casos con recurrencia de dolor, en dos pacientes se observó como hallazgo intraoperatorio un conflicto venoso. Conclusión: La DMV como tratamiento de la NT es un procedimiento efectivo y seguro. El hallazgo intraoperatorio de una “compresión” venosa podría indicar una evolución postoperatoria desfavorable. PMID:25379343

  7. Hacer frente - La vida día a día

    Cancer.gov

    Enfrentarse al cáncer incluye una serie de eventos que cambian la vida de la mayoría de las personas. Aunque puede ser difícil, hay medidas que usted puede tomar para ajustarse a su nueva forma de vida.

  8. Asteroides - Duration: 31 seconds.

    NASA Video Gallery

    Los asteroides son más que una roca metálica que orbita alrededor del sol. Al igual que la Tierra, es posible que Ceres, el asteroide más grande del sistema solar, tenga casquetes polares. Únete a ...

  9. Cigarrillos electrónicos | Smokefree Español

    Cancer.gov

    Seguramente ha oído a personas hablar del uso de los cigarrillos electrónicos como una manera de dejar de fumar. Si esta pensando en usar un cigarrillo electrónico, aquí hay tres cosas que debe de saber.

  10. Cuestionarios | Smokefree Español

    Cancer.gov

    Los cuestionarios de Smokefree son una manera divertida de obtener información importante sobre temas relacionados con dejar de fumar, como los síntomas de abstinencia, el estrés y el humo de segunda mano. Responda un cuestionario y mejore su método para dejar de fumar.

  11. Development of single nucleotide polymorphism (SNP) markers from the mango (Mangiferaindica) transcriptome for mapping and estimation of genetic diversity

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The development of resources for genomic studies in Mangifera indica (mango) will allow marker-assisted selection and identification of genetically diverse germplasm, greatly aiding mango breeding programs. We report here a first step in developing such resources, our identification of thousands una...

  12. Getting a CAT Scan

    MedlinePlus

    ... Snowboarding, Skating Crushes What's a Booger? Getting a CAT Scan (Video) KidsHealth > For Kids > Getting a CAT Scan (Video) Print A A A Text Size en español Obtención de una tomografía computada (video) CAT stands for "computerized axial tomography." Translated, that means ...

  13. Se lanza Red Nacional de Estudios Clínicos del NCI

    Cancer.gov

    El Instituto Nacional del Cáncer (NCI) puso en marcha una nueva red de investigación de estudios clínicos con el objetivo de mejorar el tratamiento de más de 1,6 millones de estadounidenses que reciben un diagnóstico de cáncer cada año.

  14. Constructing and Validating the Foreign Language Attitudes and Goals Survey (FLAGS)

    ERIC Educational Resources Information Center

    Cid, Eva; Granena, Gisela; Tragant, Elsa

    2009-01-01

    The present study describes the process that was followed in the construction and validation of the foreign language attitudes and goals survey (FLAGS), a new questionnaire based on qualitative data from Tragant and Munoz [Tragant, Munoz, C., 2000. "La motivacion y su relacion con la edad en un contexto escolar de aprendizaje de una lengua

  15. Topic 101: Eleven Campuses, One University, Many Strikes

    ERIC Educational Resources Information Center

    Navarro-Rivera, Pablo

    2010-01-01

    Students from the University of Puerto Rico (UPR) went on strike in April, and, soon after, 10 of the 11 campuses of a public system with more than 60,000 students were closed. "Once recintos, una universidad" (eleven campuses, one university) was the maxim students used to emphasize the concept of the UPR as a system unified by similar goals,…

  16. La necesidad de cohetes más veloces - Duration: 31 seconds.

    NASA Video Gallery

    Los cohetes utilizados por la NASA son excelentes, pero no nos pueden llevar muy lejos ni muy rápido a aquellos lugares a los que todavía no llegamos, como Marte, o más lejos. Una solución posible ...

  17. Mapa de Vulnerabilidad en Honduras

    NASA Astrophysics Data System (ADS)

    Sánchez, A. A.

    2013-05-01

    Dado que Honduras geográficamente se encuentra en una zona que esta expuesta a diferentes fenómenos sísmicos y climatológicos. Investigamos cuales son las zonas mas propensas a desastres naturales, la vulnerabilidad y el factor de resiliencia de la población de acuerdo a diferentes parámetros de estudio.

  18. Plantas crucíferas y la prevención del cáncer

    Cancer.gov

    Hoja informativa que resume los resultados de estudios sobre las plantas crucíferas y el cáncer. Incluye una lista de plantas crucíferas y las guías alimentarias recomendadas para el consumo de verduras.

  19. Hojas informativas del NCI

    Cancer.gov

    La colección de hojas informativas del NCI trata de una variedad de temas relacionados con el cáncer. Las hojas informativas se revisan y ponen al día de acuerdo a las investigaciones más recientes sobre el cáncer.

  20. Overview of Spanish and Latin American Distance Higher Education.

    ERIC Educational Resources Information Center

    Garcia Garrido, Jose Luis

    1991-01-01

    Provides a brief overview of Spanish and Latin American distance education programs for higher education and describes the three most important institutions: (1) the Spanish UNED (Universidad Nacional de Educacion a Distancia); (2) the Costa Rican UNED (Universidad Estatal a Distancia); and (3) the Venezuelan UNA (Universidad Nacional Abierta).

  1. Relevamiento de HI en las Nubes de Magallanes

    NASA Astrophysics Data System (ADS)

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

    El relevamiento de HI en el hemisferio sur, que se está realizando desde el IAR con el nuevo receptor enfriado, abarca, en su rango de velocidades, las velocidades desplegadas por el hidrógeno neutro de las Nubes de Magallanes. Esto permite obtener los perfiles de velocidad correspondientes a estas galaxias con una sensibilidad y una completitud de grilla excepcionales para el estudio de la distribución y de la cinemática del gas a gran escala y con una resolución angular de 30' y una resolución en velocidad de 1 km/s. Estas condiciones permiten el estudio de los campos de velocidad, de las componentes múltiples en velocidad, de las asimetrías, concentraciones y burbujas en la distribución del gas, los puentes entre las Nubes y entre las Nubes y la Galaxia, etc. Estas características son de particular importancia para su correlación con los mapas obtenidos con las emisiones en el radio-continuo, el IR y el CO (relacionable con el hidrógeno molecular) todas las cuales permiten el estudio de la dinámica de las Nubes y su relación con la Galaxia, de la formación y evolución estelar y de la evolución de la Nubes mismas.

  2. Materiales en Marcha para el Esfuerzo Bilingue-Bucultural (Materials on the March for the Promotion of Bilingualism/Biculturalism), December 73.

    ERIC Educational Resources Information Center

    San Diego City Schools, CA.

    This newsletter is designed to promote bilingual/bicultural education. Articles in this issue include: "Una Mejor Comprension de la Cultura Hispanoamericans" ("A Better Understanding of Hispanoamerican Culture"), "Portuguese Science Materials,""Comentario Sobre Materiais Portugueses" ("Commentary on Portuguese Materials"), "Will Foreign Languages

  3. Resultados de pruebas de laboratorio

    Cancer.gov

    Hoja informativa que describe la función de las pruebas de laboratorio en la detección y diagnóstico de enfermedades. Incluye una lista de las pruebas regulares que se usan en oncologïa y trata brevemente de cómo se interpretan sus resultados.

  4. Reproduccion del ganado

    Technology Transfer Automated Retrieval System (TEKTRAN)

    La determination de prenez es una de las principales herramientas de manejo en el Ganado de came. Le habilidad de determiner prenez proporciona al productor un medio de tomar sus decsiones de seleccion y descartarte en momentos decisivos, enfocando los recursos de la operacion en reporductores confi...

  5. Constructing and Validating the Foreign Language Attitudes and Goals Survey (FLAGS)

    ERIC Educational Resources Information Center

    Cid, Eva; Granena, Gisela; Tragant, Elsa

    2009-01-01

    The present study describes the process that was followed in the construction and validation of the foreign language attitudes and goals survey (FLAGS), a new questionnaire based on qualitative data from Tragant and Munoz [Tragant, Munoz, C., 2000. "La motivacion y su relacion con la edad en un contexto escolar de aprendizaje de una lengua…

  6. Leyendo con tu hijo: Consejos practicos para los padres... (Reading with Your Child: Practical Advice for Parents...).

    ERIC Educational Resources Information Center

    Colorado State Dept. of Education, Denver.

    This brochure (in Spanish) offers some practical tips for Spanish-speaking parents who wish to read to their young children. The brochure first provides general tips, such as "Lea a su hijo en voz alto por lo menos unos 15 minutos todos los dias" (Read to your child aloud for at least 15 minutes daily), and "Estabeleza una rotina y un lugar para…

  7. New oleanan-type triterpene and cincholic acid glycosides from Peruvian "Uña de Gato" (Uncaria tomentosa).

    PubMed

    Kitajima, Mariko; Hashimoto, Ken-Ichiro; Sandoval, Manuel; Aimi, Norio; Takayama, Hiromitsu

    2004-10-01

    A new oleanan-type triterpene and three new cincholic acid glycosides were isolated from Peruvian "Una de Gato" (Cat's claw, plant of origin: Uncaria tomentosa), a traditional herbal medicine in Peru. Their structures were determined by spectroscopic analysis. PMID:15467250

  8. Cambio climático - Duration: 30 seconds.

    NASA Video Gallery

    ¿La NASA trata sólo temas de astronautas, trasbordadores y el planeta? Sí, la NASA tiene más de una decena de satélites estudiando la Tierra. La información que recaban estos satélites ayudan a que...

  9. Lo que usted necesita saber sobre™ el cáncer de seno

    Cancer.gov

    Contiene información sobre las opciones de tratamiento, los diferentes médicos que tratan el cáncer de seno, la obtención de una segunda opinión, los cuidados de seguimiento y las fuentes de apoyo para alguien que ha sido diagnosticado recientemente con c

  10. The Traffic in Meaning

    ERIC Educational Resources Information Center

    Kramsch, Claire

    2006-01-01

    This paper was addressed to an American audience in response to Mary Louise Pratt's Una Lecture, "English-only "vs." National Security: Language and contemporary geopolitics", at the University of California, Berkeley on March 16, 2004. It makes the point that it is not enough for Americans to learn foreign languages; they must also understand…

  11. Hey! A Bedbug Bit Me!

    MedlinePlus

    ... Snowboarding, Skating Crushes What's a Booger? Hey! A Bedbug Bit Me! KidsHealth > For Kids > Hey! A Bedbug ... español ¡Ay! ¡Me picó una chinche! What a Bedbug Is A bedbug is a small (about the ...

  12. Curiosity --El nuevo robot explorador de Marte - Duration: 114 seconds.

    NASA Video Gallery

    El nuevo Laboratorio Científico de Marte llamado Curiosity tiene grandes preguntas que responder una vez que llegue a Marte. Infórmese sobre la misión con el analista de trayectoria de la NASA Fern...

  13. If Your Child is Raped

    MedlinePlus

    ... All About Food Allergies If Your Child Is Raped KidsHealth > For Parents > If Your Child Is Raped Print A A A Text Size What's in ... Si su hijo es víctima de una violación Rape — forced, unwanted sexual intercourse — can happen to males ...

  14. Mass Ejection from Old and Young Stars and the Sun

    NASA Astrophysics Data System (ADS)

    Jatenco-Pereira, V.; Opher, R.

    1990-11-01

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

  15. Pneumatocele selar a tensión: Reporte de un caso y revisión de la literatura

    PubMed Central

    Campero, Álvaro; Ajler, Pablo; Goldschmidt, Ezequiel; Bendersky, Damián; Campero, Abraham

    2012-01-01

    Introducción: El neumoencéfalo a tensión luego de la cirugía transesfenoidal es poco común. En la literatura existen pocos casos reportados en los cuales el aire se encuentra localizado exclusivamente en las regiones selar y supraselar, constituyendo un pneumatocele selar. En este artículo se describe un caso inusual de pneumatocele selar a tensión de presentación tardía. Descripción del caso: Una mujer de 57 años consultó por hemianopsia bitemporal. Previamente, ya se le había realizado una cirugía transnasal por un adenoma hipofisario y se le había colocado una derivación lumbo-peritoneal por la presencia de una fístula de líquido cefalorraquídeo. Además, se le había realizado una resección transcraneal de un componente intracavernoso del tumor y radiocirugía debido a la agresividad del mismo. Se llevó a cabo una resonancia magnética que demostró un pneumatocele selar y supraselar. Intervención: Se realizó un abordaje transciliar. La región selar estaba encapsulada por tejido cicatrizal debido a los procedimientos previos. Se abrió la cicatriz y el aire fue evacuado. Posteriormente, el piso selar fue cerrado con grasa y cola de fibrina. Despuós del procedimiento, su campo visual retornó a la normalidad. Un año después de su última cirugía, continua asintomática. Conclusión: El pneumatocele selar y supraselar a tensión es un hallazgo extremadamente raro luego de una cirugía transesfenoidal. Su manifestaciónw clínica sería la alteración visual debida a la compresión inferior de la vía óptica. El pneumatocele selar a tensión debe ser evacuado en un corto plazo. PMID:23596554

  16. La implantacion del enfoque constructivista en el aula de ciencia: Estudio de caso multiple

    NASA Astrophysics Data System (ADS)

    Arroyo Betancourt, Luz I.

    Esta investigacion estudia la implantacion del enfoque constructivista en tres aulas de ciencia del contexto puertorriqueno. Se auscultaron las practicas educativas que utilizan maestras consideradas constructivistas y la correspondencia de sus practicas educativas con los elementos esenciales de la didactica que proponen los teoricos de los planteamientos constructivistas. Se ausculto, ademas, a que vision del enfoque constructivista responden las expresiones de las maestras acerca de su practica educativa y como compara con su quehacer, a la luz de los elementos esenciales de las visiones constructivistas piagetiana, social y radical. Se utilizo el diseno de estudio descriptivo de caso multiple. El estudio se baso en entrevistas a profundidad, revision de documentos y observacion no participativa a la sala de clases. El contexto fueron tres escuelas publicas de la Region Educativa de San Juan, una elemental, una intermedia y una superior. Los resultados confirmaron que la transicion hacia el enfoque constructivista es un proceso que toma tiempo, dedicacion y la participacion en adiestramientos y readiestramientos acerca del nuevo enfoque. Las maestras coinciden en la mayoria de las practicas educativas que utilizan para implantar el enfoque constructivista de ensenanza y difieren en algunas debido, probablemente, a que han tenido que adaptarlas a los correspondientes niveles de ensenanza: elemental, intermedio y superior. Dos de las maestras planifican por conceptos generadores, mientras que una de ellas planifica siguiendo la guia que recibe del Departamento de Educacion. Difieren ademas, en el enfasis que confieren al inquirir cientifico. Con relacion a la correspondencia entre la vision manifestada por las maestras a la luz de las visiones piagetiana, social y radical, aparentemente, las preguntas del protocolo de entrevistas no lograron evocar la informacion con suficiente profundidad, por lo que la investigadora tuvo que inferir las visiones de las participantes basado en lo que estas manifestaron en su practica didactica. Dos maestras coinciden en una vision constructivista social de la construccion del conocimiento, del aprendizaje y de los metodos didacticos. La otra manifesto una vision constructivista piagetiana en el aprendizaje, los metodos didacticos y en la construccion del conocimiento. Se espera que este trabajo, ademas de promover los estudios de caso sobre el enfoque constructivista de ensenanza en el contexto puertorriqueno, sirva para que los maestros, que estan transformando su enfoque educativo de uno tradicional a uno constructivista, tengan una vision mas clara de la implantacion de este enfoque. Se espera ademas que sirva para que el Departamento de Educacion y sus programas de adiestramiento y readiestramiento en servicio, asi como las universidades y sus programas de preparacion de maestros, tomen en cuenta los resultados y recomendaciones de este estudio al revisar sus programas.

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

    NASA Astrophysics Data System (ADS)

    Cordova-Santiago, Lizzette Astrid

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

  18. Meningococco B: controllo di due focolai epidemici mediante vaccinazione

    PubMed Central

    2014-01-01

    Riassunto La problematica di un efficace approccio vaccinale nei confronti del Meningococco B (MenB) è stata superata identificando con la metodica della "reverse vaccinology" alcuni antigeni capaci di indurre una risposta verso la maggior parte dei ceppi di MenB circolanti nel mondo. Il nuovo vaccino MenB a 4 componenti (4CMenB) è stato autorizzato in Europa, Australia e Canada, ed è entrato nei calendari di immunizzazione pediatrica internazionali: Australia, Canada, UK. In Italia, le prime regioni che hanno raccomandato la vaccinazione contro il MenB sono state Basilicata e Puglia. La gestione di epidemie/focolai epidemici richiede la messa in atto di una risposta rapida da parte delle autorità sanitarie nei confronti di una emergenza sanitaria ad elevato impatto, anche emotivo, sulla popolazione, come recentemente dimostrato in due università americane. Alla dichiarazione di focolaio epidemico in atto, in entrambi i contesti si è attivata una procedura per l'uso del vaccino 4CMenB non ancora autorizzato negli USA. È stato così possibile organizzare gli interventi di profilassi attiva nei due campus universitari, adottando il primo impiego su larga scala del nuovo vaccino 4CMenB e conseguendo, in tempi relativamente brevi, elevati tassi di copertura vaccinale. A fronte di circa 14000 studenti immunizzati con almeno una dose, non è stata segnalata alcuna problematica di eventi avversi conseguenti all'immunizzazione; ad oggi non si sono verificati casi nei soggetti che hanno ricevuto il vaccino. Come conseguenza dei due focolai descritti, è oggi in corso la valutazione da parte dell'FDA per l'estensione dell'uso del vaccino 4CMenB negli Stati Uniti negli adolescenti e giovani adulti. PMID:25916017

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

    NASA Astrophysics Data System (ADS)

    Garcia-Ramirez, Jaime Antonio

    En esta investigacion, se desarrollo un instrumento que permite medir percepciones relacionadas al contexto de constriccion del conocimiento cientifico. Se examinaron instrumentos existentes y se encontro que el VOSTS (Views on science, technology, and society), instrumento desarrollado empiricamente en Canada por Aikenhead, Ryan y Fleming, podia traducirse y validarse en el contexto cultural puertorriqueno. El instrumento es extenso, consta de 113 reactivos, cada uno con una premisa basica relacionada a la tematica ciencia, tecnologia y sociedad y un numero de alternativas relacionadas a la premisa que oscila entre siete y trece. Se delimito su utilizacion a los quince reactivos identificados por los autores como relacionados a la construccion social del conocimiento cientifico. Metodologicamente, se procedio a utilizar el modelo de adaptacion intercultural, que permite que el instrumento desarrollado satisfaga las dimensiones de equivalencia semantica, de contenido, tecnica, de criterio y conceptual, atemperado asi al instrumento original. Se cumplio con este proposito mediante la traduccion de la version original en ingles al espanol y viceversa. Se utilizaron comites para examinar la traduccion y la retro-traduccion del instrumento. Se realizo una prueba piloto con estudiantes universitarios de nuevo ingreso, utilizando el instrumento traducido para asegurar su intelegibilidad. La confiabilidad del instrumento se determino mediante la intervencion de un panel de expertos quienes clasificaron las distintas posiciones dentro de cada reactivo en: realista, con merito e ingenua; se transformaron estas opciones en valores numericos lo que permitio establecer una escala Likert para cada una. Se suministro el instrumento a una muestra de estudiantes universitarios de nuevo ingreso con caracteristicas similares a las de la poblacion puertorriquena en cuanto a ejecucion en las pruebas de aptitud verbal y matematica del College Board. Los resultados de sus contestaciones fueron transformados numericamente para poder obtener el coeficiente de correlacion de Spearman-Brown para el instrumento (0.661, p < 0.01). El analisis de las contestaciones de los estudiantes refleja percepciones diversas y, en algunos casos, contradictorias con respecto al contexto de construccion del conocimiento cientifico.

  20. Población de galaxias de baja luminosidad en cúmulos

    NASA Astrophysics Data System (ADS)

    Valotto, C. A.; Muriel, H.; Moore, B.; García Lambas, D.

    En este trabajo se discute sobre la presencia de un exceso de galaxias de baja luminosidad en medios de alta densidad de galaxias y la posibilidad de que los halos de galaxias cD puedan ser formados a partir de galaxias en cúmulos ricos, los cuales muestran una función de luminosidad (FL) con el extremo débil plano. Se analizaron muestras de cúmulos cercanos obtenidas a partir de los catálogos de Abell y X-ray Sample of Bright Clusters. Los resultados obtenidos muestran que los cúmulos de galaxias que tienen emisión en rayos X detectada poseen una FL plana (α ≈ -1.2), consistente con los valores encontrados para las galaxias de campo. En cambio, los cúmulos de galaxias identificados a partir de distribuciones bidimensionales de galaxias que no tienen su contraparte en rayos X, muestran una FL con una pendiente pronunciada en el extremo débil (α ≈ -1.6). Se examinaron además, los posibles efectos debido a la presencia de una galaxia central dominante sobre el extremo débil de la FL. Se analizaron muestras de acuerdo a la clasificación Bautz-Morgan dividiendo en las submuestras I,I-II y II, II- III, III. Las FL resultantes para ambas muestras son indistinguibles. Nuestros resultados son consistentes con la hipótesis de que los efectos de proyección en cúmulos identificados en dos dimensiones pueden producir un exceso artificial de galaxias de baja luminosidad.