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Search Results: 1 - 10 of 198284 matches for " Delsy; Colmenares-Sulbarán "
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Ultraestructura de las miofibrillas en cardiomiocitos durante el desarrollo embrionario tardío y postnatal temprano de ratón.
Nancy Jaimes-Méndez,Zulma Pe?a-Contreras,Delsy Dávila-Vera,Melisa Colmenares-Sulbarán
Bistua : Revista de la Facultad de Ciencias Básicas , 2011,
Abstract: En este estudio se describen por medio del análisis ultraestructural los cambios en la citodiferenciación de las miofibrillas en los cardiomiocitos del tejido cardiaco en desarrollo embrionario tardío y postnatal temprano de ratón. El proceso de diferenciación progresiva en diferentes espacios celulares de las miofibrillas, es una manifestación propia de las etapas estudiadas. En algunas células se observa la ultraestructura propia de las sarcómeras, con sus respectivas bandas Z, I, A y H, en contraste con otras miofibrillas que no se evidencian éstas estriaciones, posiblemente porque están en proceso de formación. En edades embrionarias las miofibrillas están separadas unas de otras por un espacio interfibrilar irregular; mientras que en edades postnatales, tienen una mejor organización y muchas de ellas están empaquetadas en masas confluentes y compactas que se fusionan para formar fibras largas, ramificadas y se disponen siguiendo el eje longitudinal de la célula, intercaladas con filas de mitocondrias. Esta conformación se relaciona con la forma alargada de los cardiomiocitos y con el aumento de la longitud de las miofibrillas; mientras que la presencia en el sarcoplasma de grandes áreas electrón- translucidas se reducen a medida que aumenta la maduración, producto de la diferenciación estructural de la síntesis, organización de las miofibrillas y otras organelas. Estos cambios morfológicos en la citoarquitectura son consecuencia de la adaptación del miocardio postnatal a las exigencias de trabajo poco después del nacimiento y además, están relacionados con los cambios circulatorios que ocurren en el periodo neonatal.
Investigación de Blastocystis sp. en agua de consumo humano en una población escolar de la zona rural del estado Mérida-Venezuela
Flores-Carrero,Ana Deixy; Pe?a-Contreras,Zulma; Dávila-Vera,Delsy; Colmenares-Sulbarán,Melisa; Mendoza-Brice?o,Rosa Virginia;
Kasmera , 2011,
Abstract: in order to determine the presence of blastocystis sp. in drinking water at a rural school in merida, 36 water samples were collected from natural sources that feed the distribution tank and faucets during the months of september, 2008, february and december, 2009, and may, 2010. samples were processed using the technique proposed by suresh et al. (2005). all samples were negative. these results suggest that the water was exempt from blastocystis or that the quantity of viable cysts present in the samples was very low, not permitting reproduction in the culture. this report suggests the importance of using more sensitive techniques to detect low amounts of the organism in drinking water. the study of student water consumption habits at the rural school showed that more than half the population consume boiled water; probably, they are aware that the water source has not been treated for drinking.
Diagnóstico técnico del sistema de producción con vacunos de doble propósito en la zona de colinas del estado Guárico, Venezuela
Sulbarán,Luis; Drescher,Karín; Martínez,Nelson; Colmenares,Omar; Ricca,Robustino;
Zootecnia Tropical , 2008,
Abstract: this research aimed to make a diagnosis of the technical production system located in a hilly area of guarico state, venezuela. we followed the criteria: of geographic location and a maximum of 150 animals to determine the sample, which was 95 farms selected at random. as a tool for collecting information, a survey containing socio-economic, production, and management variables was utilized. descriptive statistics were used to analyze the data. it was observed low proportion of milking cows (23.6%), uncontrolled mating, with an average of 18 cows per bull in herds with a predominance of breed and crossbredherd (47%). the most important workforce was the family and a few producers keep and use records. the average farm size was 113.1 ha. the physical productivity was very low, with a stocking rate of 0.3 au/ha. farms produced grain as the main product (78.4%), while beef production was a complement system, as the milk being drawn by hand and processed as cheese for sale. we found that low production rates reflect a small use of technology in the system, in turn shaped by a high variability of properties that differ in the way they used local resources. also, it was shown the high influence on the dual purpose system by cereals, such as maize and sorghum, which are closely linked by the feeding benefit that have on the animals of the herd.
Patrón tecnológico del sistema con vacunos de doble propósito en la región colinosa del bosque seco tropical en Venezuela
Sulbarán,Luis; Drescher,Karín; Martínez,Nelson; Colmenares,Omar; Ricca,Robustino;
Zootecnia Tropical , 2008,
Abstract: the study was carried out in a tropical dry forest on a hilly landscape at the central plains of venezuela having as objective the definition of the technological patterns implemented in the bovine production system in the area. a sample of 79 production units was chosen, in which 20 structural and functional variables were evaluated. the multivariate analysis of hierarchical upward classification was used with the purpose of detecting groups of production units with similar variable characteristics with the intention to homogenize into classes of similar properties. there were defined three farm typologies with characteristic specific in the technological area: class 1, conformed by units of production of double purpose (29.1%) with low use of technological level. class 2, represented by units of production of double purpose (60.8%) with an intermediate use of technology, and class 3, constituted by units of production of double purpose (10.1%) with high use of technology. it is concluded that in the 79 farms surveyed, three patterns of technological use were identified, demonstrating a wide variability of the existing dual system in the region, which becomes more pronounced as it deepens within each type of farms established.
Efecto antiinflamatorio de la Atorvastatina en pacientes con Síndrome Coronario Agudo: Evaluación del perfil lipídico
Sulbarán,MA; Lanza,L;
Archivos Venezolanos de Farmacología y Terapéutica , 2004,
Abstract: the purpose of this study was evaluated the anti-inflammatory effect and the effect on the profile lipidics of the atorvastatine (tarimyl?) in patients with acute coronary syndrome, were studied patient of both sexes, among 39 and 75 years of age that entered in the service of cardiology of the general hospital of the south ?dr. pedro iturbe?, located in the municipality san francisco of the state zulia with diagnostic of acute coronary syndrome (unstable angina or myocardium infarct), during the period understood among the months of march from the 2003 to may of the 2004, to which were divided in two groups, one that received atorvastatine 40 mg. and another group that didn?t receive any estatine and it was considered control. in all the patients were quantified the levels plasmatic of protein c and fibrinogen at the beginning, to the week and the month, as well as the lipids levels before and after 4 weeks of treatment. the following results were obtained: the studied population?s age average was located in 58.24 ± 9.39 years in the group control and of 55.31 +/- 9.76 years in the treatment group, the masculine sex prevailed with 58% of the cases in the group control and 62% in the group that atorvastatina received. the diagnosis of myocardial infart was carried out in 65% of the cases. the average of the levels plasmatics of protein c to the entrance in the patients treaties with atorvastatine was located in 3.76 ± 4.5 mg/dl, and after a month in 1.36 ± 1.73 mg/dl. in the patients not tried with atorvastatine the average of the levels plasmatics of protein c to the entrance was located in 1.89 ± 2.9 mg/dl, and after a month in 1.91 ± 2.4 mg/dl. the levels of cholesterol were similar to the beginning in both groups presenting a descent in the treated group of 22% (p = 0.005), the levels of ldl-cholesterol diminished in a significant way in the group under treatment 30% (p=0.02). conclusions: the levels plasmatics of protein c diminished in 63% in the group tried w
Incidencia de las variaciones del salario real sobre la actividad económica de Venezuela: Período (1998-2006)
Pozo Sulbarán,Bladimir David;
Revista de Ciencias Sociales , 2008,
Abstract: this article analyses the influence of real wage variations on private consumption, on the one hand, by constituting a source of income, and on the production function of companies, on the other hand, by constituting a production cost; finally, on the aggregate level, its influence on venezuelan gnp during the period from 1998:i to 2006:i is analyzed, using quarterly data and taking as a ?proxy? variable for real wage variations, the index of remunerations for salaried workers, the real earned wage index (real ire) and using the ordinary minimums squared (oms) method to estimate linear - logarithmic models (log - lin), among them a cobb-douglas type production function. conclusions with the evidence available were that the real ire, despite having an inverse (negative) and significant relationship regarding the product within the production function of companies, when constituted as a production cost, it does not show a direct (positive) relationship regarding consumption when constituting a source of income for workers; likewise, it does not show a significant influence on economic activity (gnp). these results could be attributed to the fact that price variations have been proportionally higher than variations in nominal salary, thereby diminishing the actual purchasing power of the population and to the great influence the informal sector of the economy exercises on the economic activity of the country.
Efecto antiinflamatorio de la Atorvastatina en pacientes con Síndrome Coronario Agudo: Evaluación del perfil lipídico
MA Sulbarán,L Lanza
Archivos Venezolanos de Farmacología y Terapéutica , 2004,
Abstract: Con el fin de evaluar el efecto antiinflamatorio de la atorvastatina (Tarimyl ) en pacientes con Síndrome Coronario Agudo, así como el efecto sobre el perfil lipídico, se estudiaron pacientes de ambos sexos, entre 39 y 75 a os de edad que ingresaron en el Servicio de Cardiología del Hospital General del Sur "Dr. Pedro Iturbe", ubicado en el Municipio San Francisco del Estado Zulia con diagnóstico de Síndrome Coronario Agudo: Angina Inestable o Infarto Agudo al Miocardio, durante el período comprendido entre los meses de Marzo del 2003 a Mayo del 2004, a los cuales se les dividió en dos grupos, uno que recibió atorvastatina 40 mg diarios desde su ingreso y otro grupo que no recibió ningún tipo de estatina y se consideró grupo control. A todos los pacientes se les cuantificó los Niveles Séricos de Proteína C Reactiva y Fibrinógeno al momento de su ingreso, a la semana y al mes, así como los niveles de lípidos antes y después de 4 semanas de tratamiento. Se obtuvieron los siguientes resultados: La edad promedio de la población estudiada se ubicó en 58.24 ± 9.39 a os en el grupo control y de 55.31 ± 9.76 a os en el grupo de tratamiento, predominó el sexo masculino con 58% de los casos en el grupo control y 62% en el grupo que recibió Atorvastatina. El diagnóstico de infarto agudo del miocardio se realizó en un 65% de los casos. (El promedio de los Niveles Séricos de Proteína C Reactiva al ingreso en los pacientes tratados con Atorvastatina se ubicó en 3.76 ± 4.5 mg/dl, y al mes en 1.36 ± 1.73 mg/dl. En los pacientes no tratados con Atorvastatina el promedio de los Niveles Séricos de Proteína C Reactiva al ingreso se ubicó en 1.89 ± 2.9 mg/dl, y al mes en 1.91 ± 2.4 mg/dl. Los niveles de colesterol fueron similares al inicio en ambos grupos, presentando un descenso en el grupo tratado de 22% (P= 0.005), los niveles de LDL-colesterol disminuyeron de manera significativa en el grupo bajo tratamiento 30% (P=0.02). Conclusiones: Los Niveles Séricos de Proteína C Reactiva disminuyeron en un 63% en el grupo tratado con Atorvastatina, mientras que en el grupo que no recibió Atorvastatina disminuyó en un 1% The purpose of this study was evaluated the anti-inflammatory effect and the effect on the profile lipidics of the atorvastatine (Tarimyl ) in patients with acute Coronary Syndrome, were studied patient of both sexes, among 39 and 75 years of age that entered in the Service of Cardiology of the General Hospital of the South Dr. Pedro Iturbe , located in the Municipality San Francisco of the State Zulia with diagnostic of acute Coronary Syndrome (Unstable angina o
Rese a de "Peor el Remedio... El Impacto de las Respuestas a la Violencia Delincuencial en la Convivencia Ciudadana" de Alexis Romero Salazar
Miguel Angel Romero Sulbarán
Espacio Abierto , 2008,
Abstract:
Aplicación de una guía didáctica sobre cine para generar conocimiento en educación: resultados preliminares
Arreaza,Emperatriz; Sulbarán,Eugenio; Avila,Rita;
Enlace , 2009,
Abstract: the main objective of this paper is to present the didactic guide for the critical teaching of the audiovisual means, with the purpose to facilitate instructional strategies for the critical study and alternative use of the audiovisual means in the classroom, based in the transversal contents (values) and the knowledge contents for each grade.
Aplicación de una guía didáctica sobre cine para generar conocimiento
Emperatriz Arreaza,Eugenio Sulbarán,Rita Avila
Enlace , 2009,
Abstract: El objetivo general de este artículo es presentar los resultados preliminares de la aplicación de una guía didácticasobre el uso del cine en la generación de conocimientos, con el fin de facilitar estrategias instruccionales para elestudio crítico y el uso alternativo de los medios audiovisuales en el aula de clases, basándose en los ejes trasversales(ense anza de valores) y los ejes del conocimiento (contenido programático) para la educación básica.
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