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Search Results: 1 - 10 of 199402 matches for " Darling Viviam; Nu?ez G "
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Prevalencia de lesiones de bajo y alto grado de cuello uterino en una ciudad colombiana
Mendoza T,Luis Alfonso; Pedroza P,Marly Julieta; Micolta C,Paul Hernando; Ramirez R,Andrés; Cáceres G,Christian Ramiro; López S,Darling Viviam; Nuez G,Antonio José; Acu?a P,Maria;
Revista chilena de obstetricia y ginecología , 2012, DOI: 10.4067/S0717-75262012000200009
Abstract: objective: to determine the prevalence of lesions of low and high grade cervical in a lender institution health services, tuluá, colombia, 2008-2010. methods: we performed a retrospective study which included women between 15 and 75 years living in tuluá. we evaluated the normality of quantitative variables, using the median or average with their variances for quantitative variables according to their distribution and frequencies and proportions for categorical variables. results: 3539 women were included. the median age was 38 years with interquartile range (ir: 29-46 years) and the median parity was 1 (ir: 0-3). in relation to social security and family planning birth control, most were private and did not use any method. the 87.5% of smears was reported as negative, low-grade squamous intraepitelial lesions (lsil) 8.2%, atypical squamous cells of undetermined significance (asc-us) 2.6%, high-grade squamous intraepitelial lesions (hsil) 0.9%, atypical squamous cells cannot rule out a high grade lesion (asc-h) 0.0%, atypical squamous glandular cells of undetermined significance (asgus) 0.4% and invasive carcinoma 0.2%. conclusion: the prevalence of cytological abnormalities was low in all groups studied, however, a greater number of lsil to the fourth decades of life and those who began their sexual life after 40 years. similarly, an inverse relationship was found between parity, hormonal family planning and pre-neoplastic lesions.
The importance of controversies in the epistemic progress of ecology
Nuez,Paula G; Nuez,Martín A;
Interciencia , 2007,
Abstract: ecology, as a scientific discipline, has scarcely been studied relative to other fields of science. in general its epistemic changes were described as a cumulative trajectory of scientific progress, such as the one proposed by classical philosophers of science, or as a model of successive ruptures, as in kuhn?s interpretation of scientific change. in this paper we attempt to show that, like in other scientific disciplines, the trajectory of change in ecology can be different from these dynamics s. focus is placed on the analysis of controversies in ecology, one of the main sources of self-criticism in the discipline. in some cases, persistent controversies are seen as evidence of the immaturity and/or weakness of this field. in this study controversies are not assumed to be detrimental. even when controversies do not achieve a synthesis, as many in ecology do not, they can be progressive from an epistemic perspective. in this study two of the most prominent debates in the history of ecology are analyzed: the debate about plant succession and the debate on the role of competition as the principal force structuring natural communities. it is found that, contrary to the common perception of controversies as problems to be avoided, they can produce epistemic progress by means of the incorporation of new questions and the increase in rigor in hypothesis-testing.
Controversias en ecología: la competencia, de la certeza a la pregunta
Nuez,Martín A; Nuez,Paula G;
Ecolog?-a austral , 2005,
Abstract: in the present work we consider the dynamic of change in the science of ecology. to this end, we will keep in mind that ecology, as a scientific discipline, has scarcely been studied relative to other fields of science, and because of this, the main epistemological studies do not consider the peculiarities of ecology. the changes in ecology do not correspond clearly to a cumulative trajectory of scientific progress (such as the one proposed by classical philosophers of science), or to a model of successive ruptures (as in kuhn′s interpretation of scientific change). in comparison to these alternatives, the trajectory of change in ecology is more complex. this complexity is heralded in the analysis of the permanent controversies in ecology, one of the main sources of self-criticism in the discipline that is seen as a problem to solve rather than a way of progress. in some cases, controversies are seen as evidence of the immaturity and/or weakness of this scientific discipline. in this study, we analyzed the changes in ecology using the concepts in the model of controversial spaces, developed by nudler. in this model, even when controversies do not reach a final solution, as many in ecology, they can be progressive from an epistemic perspective, which means that progress can be produced through controversies that do not reach a synthesis. we applied this model to one of the most passionate controversies of recent years in ecology: interspecific competition as an explanatory factor for the structure of communities. since the origin of ecology, competition has been one of the best recorded interactions, producing a large body of empirical data and theories, some of them foundational to the discipline. this controversy was originated by the use of mathematical and statistical tools as null models in the analysis of the effects of competition on natural communities, such as in the g. e. hutchinson rule of 1.3 and in the j. m. diamond community assembly rules, where compet
Arqueología del Hospital San Vicente de Paul
Nuez,Harold; Osorio,Carlos G;
Revista médica de Chile , 2007, DOI: 10.4067/S0034-98872007000200017
Abstract: the san vicente de paul hospital was the first clinical hospital of the university of chile and was located at the same place of present school of medicine. the school area contains several old buildings, which are probably remains of the san vicente de paul hospital. after a careful study of the current plans of the faculty of medicine of the university of chile and those of the san vicente de paul hospital, and after checking measurements on the actual site, we were able to demonstrate that two and a half clinical rooms of the original building and some parts of the old laundry still remain intact. at present, these constructions are being used as storerooms, student's union offices, and other activities. we expect that this article may contribute to improve the knowledge of our roots by our own as well as by future generations and that it may inspire our authorities to take care and preserve this important patrimonial remains of our national medicine
Arqueología del Hospital San Vicente de Paul The archeology of San Vincente de Paul Hospital in Santiago, Chile
Harold Nuez,Carlos G Osorio
Revista médica de Chile , 2007,
Abstract: The San Vicente de Paul Hospital was the first Clinical Hospital of the University of Chile and was located at the same place of present School of Medicine. The School area contains several old buildings, which are probably remains of the San Vicente de Paul Hospital. After a careful study of the current plans of the Faculty of Medicine of the University of Chile and those of the San Vicente de Paul Hospital, and after checking measurements on the actual site, we were able to demonstrate that two and a half clinical rooms of the original building and some parts of the old laundry still remain intact. At present, these constructions are being used as storerooms, student's union offices, and other activities. We expect that this article may contribute to improve the knowledge of our roots by our own as well as by future generations and that it may inspire our authorities to take care and preserve this important patrimonial remains of our national medicine
Vigilancia individual de la exposición ocupacional al r?entgendiagnóstico
ez Nuez,David G.; Borroto Valdéz,Marisela;
Revista Cubana de Higiene y Epidemiolog?-a , 1995,
Abstract: se describe el método seguido en el departamento de higiene de las radiaciones del instituto de medicina del trabajo para la vigilancia radiológica individual del personal ocupacionalmente expuesto en radiodiagnóstico médico en cuba. como control dosimétrico se emplea la dosimetría fílmica personal. se detalla la implementación en computadora de los algoritmos de cálculo y el registro de las dosis equivalentes. el cálculo se realiza a partir de un análisis de las dosis aparentes detrás de los diferentes filtros para tener en cuenta la compensación por dependencia energética, actualizándose la dosis acumulada anual. también se puede calcular el rango energético al que ha sido irradiado un dosímetro. el código desarrollado automatiza los cálculos y posibilita aplicar un método de relativa mayor complejidad y precisión, y permite disponer de archivos de alta confiabilidad y rápido acceso con los resultados y los datos de interés del personal controlado. el sistema ha demostrado su eficacia en el monitoreo del personal controlado.
Vigilancia individual de la exposición ocupacional al r entgendiagnóstico
David G. Sáez Nuez,Marisela Borroto Valdéz
Revista Cubana de Higiene y Epidemiología , 1995,
Abstract: Se describe el método seguido en el Departamento de Higiene de las Radiaciones del Instituto de Medicina del Trabajo para la vigilancia radiológica individual del personal ocupacionalmente expuesto en radiodiagnóstico médico en Cuba. Como control dosimétrico se emplea la dosimetría fílmica personal. Se detalla la implementación en computadora de los algoritmos de cálculo y el registro de las dosis equivalentes. El cálculo se realiza a partir de un análisis de las dosis aparentes detrás de los diferentes filtros para tener en cuenta la compensación por dependencia energética, actualizándose la dosis acumulada anual. También se puede calcular el rango energético al que ha sido irradiado un dosímetro. El código desarrollado automatiza los cálculos y posibilita aplicar un método de relativa mayor complejidad y precisión, y permite disponer de archivos de alta confiabilidad y rápido acceso con los resultados y los datos de interés del personal controlado. El sistema ha demostrado su eficacia en el monitoreo del personal controlado.
Estudio anual de la eliminación de huevos y ooquistes de parásitos gastrointestinales y larvas de nemátodos pulmonares en ovinos de una estancia en Magallanes, Chile
SIEVERS,G.; JARA,M.; CARDENAS,C.; NUEZ,J.;
Archivos de medicina veterinaria , 2002, DOI: 10.4067/S0301-732X2002000100004
Abstract: in order to obtain epidemiological data of gastrointestinal and lungworm parasitosis in sheep in magallanes, chile, a survey was carried out at the "entre vientos" station during a year (september 1999 to august 2000). the tendencies of egg, oocyst and larvae outputs of parasites were determined in 3 age categories of sheep: 9.000 lambs (born in spring 1999), 1.800 ewe hoggets (1 year old) and 13.500 ewes (2 or more years old), which were all kept under the traditional management system of the station. every 14 days, faeces were obtained from the rectum of 25 animals from each age category, sampled at random, to carry out egg counts and differentiation of gastrointestinal worm larvae, counts of cestode eggs, determination of animals that were positive to oocysts of intestinal protozoa and detection of lungworm larvae. lambs showed the greatest egg output of gastrointestinal worms during the summer, with predominance of the genus nematodirus and ostertagia. in ewe hoggets and ewes, the greatest output of ostertagia and trichostrongylus were produced in spring (november), coinciding with the temperature rise. the most contaminating category was the ewes in spring, whereas the lambs were in the summer. during spring, most of the animals were positive to eimeria spp., but the lambs were the ones with more oocyst output. the greatest oviposition of moniezia expansa eggs was registered in lambs and ewe hoggets during summer and spring respectively. dictyocaulus filaria larvae were principally detected in lambs during autumn and winter. no cases of clinic parasitosis were diagnosed during the survey. the reason for this can be the extensive grazing system and the seasonal moving of the animals all over the farm surface
Evaluación de la toxicidad de proteínas de Bacillus thuringiensis Berliner sobre el picudo del algodonero Anthonomus grandis Boheman
Gómez Sylvia,Díaz Gustavo,Nuez Victor Manuel
Agronomía Colombiana , 2006,
Abstract: El picudo del algodonero, Anthonomus grandis Boheman (Coleoptera: Curculionidae), es considerado la principal plaga del cultivo de algodón en Colombia, no sólo por los da os económicos y sociales que causa, sino porque con sus apariciones tempranas altera e interrumpe el desarrollo de los programas de manejo integrado de plagas. La importancia de un manejo inteligente radica en el hecho de que este insecto se comporta como plaga ‘clave’, con una capacidad de da o en el cultivo entre 50% y 90%, si no se controla. En el presente estudio se estableció una metodología de bioensayo que determinó la actividad tóxica de proteínas Cry3Aa y Cry1Ia de cepas de B. thuringiensis sobre larvas de primer instar de A. grandis. En los bioensayos se empleó una dieta artificial mezclada con los extractos bacterianos que contenían el complejo espora-cristal de cada cepa. Los resultados indicaron que la cepa de referencia variedad san diego presentó toxicidad sobre larvas de primer instar de A. grandis, en condiciones de laboratorio, con una concentración letal 50 (CL50) de 147,6143 μg de proteína total por mililitro de volumen final de dieta artificial, representando una alternativa potencial para el manejo de este insecto plaga del cultivo de algodón.
Estudio anual de la eliminación de huevos y ooquistes de parásitos gastrointestinales y larvas de nemátodos pulmonares en ovinos de una estancia en Magallanes, Chile Annual study of the of egg and oocyst outputs of gastrointestinal parasites and lungworm larvae in a sheep station of Magallanes, Chile
G. SIEVERS,M. JARA,C. CARDENAS,J. NUEZ
Archivos de medicina veterinaria , 2002,
Abstract: Con el fin de recabar antecedentes epidemiológicos sobre las endoparasitosis del ovino en Magallanes, XIIa Región de Chile, se trabajó en la estancia "Entre Vientos", comuna de Río Verde, durante un a o (septiembre de 1999 a agosto del 2000). A partir de animales de 3 categorías de edad mantenidos bajo un sistema de explotación extensiva, compuestos por 9.800 corderos (nacidos durante la primavera de 1999), 1.800 borregas (1 a o de edad) y 13.500 ovejas (2 o más a os de edad), se determinaron las tendencias de eliminación de huevos, ooquistes y larvas de parásitos gastrointestinales y pulmonares. Cada 14 días se obtuvo materia fecal desde el recto de 25 animales pertenecientes a cada grupo de edad, muestreados al azar, para realizar recuentos de huevos y diferenciación de larvas de nemátodos gastrointestinales, recuentos de huevos de cestodos, determinación de animales positivos a ooquistes de protozoos intestinales y detección de larvas de nemátodos pulmonares. Los corderos presentaron las mayores eliminaciones de huevos de nemátodos gastrointestinales durante el verano, con predominancia de los géneros Nematodirus y Ostertagia. En borregas y ovejas, las mayores eliminaciones de Ostertagia y Trichostrongylus se produjeron en primavera, coincidiendo con el alza de la temperatura ambiental. La categoría más contaminante fue la de las ovejas en primavera, mientras que los corderos lo fueron en el verano. Durante la primavera, la mayor parte de los animales eliminó ooquistes de Eimeria spp., pero fueron los corderos los mayores contaminantes. La mayor oviposición de huevos de Moniezia expansa se registró en corderos y borregas, durante el verano y primavera respectivamente. Larvas de Dictyocaulus filaria se detectaron principalmente en corderos durante el oto o e invierno. No se diagnosticaron casos de parasitosis clínicas durante los meses del estudio, lo que se puede explicar dado el sistema de crianza extensivo y al traslado estacional de los animales sobre toda la superficie de la estancia In order to obtain epidemiological data of gastrointestinal and lungworm parasitosis in sheep in Magallanes, Chile, a survey was carried out at the "Entre Vientos" station during a year (September 1999 to August 2000). The tendencies of egg, oocyst and larvae outputs of parasites were determined in 3 age categories of sheep: 9.000 lambs (born in spring 1999), 1.800 ewe hoggets (1 year old) and 13.500 ewes (2 or more years old), which were all kept under the traditional management system of the station. Every 14 days, faeces were obtained from the rectum of 25 animals
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