oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2019 ( 34 )

2018 ( 90 )

2017 ( 73 )

2016 ( 147 )

Custom range...

Search Results: 1 - 10 of 65202 matches for " Luis; Jiménez Torres "
All listed articles are free for downloading (OA Articles)
Page 1 /65202
Display every page Item
Evaluación farmacognóstica y fitoquímica preliminar de hyllanthus rbicularis HBK
Gutiérrez Gaitén,Yamilet Irene; Miranda Martínez,Migdalia; del Barrio,Gloria; Varona Torres,Noel; Mayoral Jiménez,José Luis;
Revista Cubana de Farmacia , 2000,
Abstract: we performed a preliminary pharmacognosic and phytochemical study of phyllanthus orbicularis hbk where the macro- and micromorphologic features of stems and leaves of this plant were inicially determined. we standardized the raw drug whose average values were tithin the allowable range if compared to those of the official drugs. through phytochemical sieving tests, we determined the general chemical composition of this drug in which the presence of flavonoids, alkaloids, coumarins, saponins, aminoacids, anthocyanidins, mucilages, triterpenes and or steroids, reducing substances, pyrocathecolic tannins, bitter and astringent principle, glycosides and quinones. also some of these metabolites were quantified. finally, we carried out the extraction and fractioning of flavonoids into very simple fractions having these compounds. also rutine and quercentin were detected together with two chromatographically pure compounds which, according to the tests applied, are suspected to be flavonoids.
Notas para una reflexión sobre el cristocentrismo y la devoción medieval a la Pasión y para su estudio en el medio rural castellano
Torres Jiménez, Raquel
Hispania Sacra : Revista de Historia Eclesiástica , 2006,
Abstract: This study presents a methodological reflection on medieval devotion to Jesus Christ, especially to Christ’s sufferings in his Passion. It critically analyses the characteristics of spirituality between the 11th and 13th centuries, which supposedly focused on Christ’s humanity. We also emphasize the complexity of the pathetic piety of the next two centuries. Finally we propose an approach to the profile of this type of devotion in a specific area of research, a Castilian rural territory at the end of the Middle Ages (Campo de Calatrava), as a contribution to people’s religiousness knowledge. Este trabajo propone una reflexión metodológica sobre la devoción medieval a Jesucristo y, en especial, la tributada a Cristo doloroso y su Pasión. Analiza de forma crítica los rasgos de la espiritualidad supuestamente centrada en la humanidad de Cristo entre los siglos XI y XIII y hace hincapié en la complejidad de la piedad patética de los dos siglos siguientes. Por último, plantea una vía de estudio sobre el alcance de este tipo de devoción en un área de observación concreta, un espacio rural castellano al final de la Edad Media (el Campo de Calatrava), a modo de contribución al conocimiento de la religiosidad del pueblo.
Efectividad de un curso de pregrado sobre medicina de familia: Validez y fiabilidad de un test de concordancia script
Ruiz Moral,Roger; Pérula de Torres,Luis Angel; Barrios,Luciano; Parras Rejano,Juan Manuel; Aparicio Sánchez,Julio; Lemos Pe?a,Ana; Pérez Jiménez,Francisco;
Educación Médica , 2004, DOI: 10.4321/S1575-18132004000300006
Abstract: introduction: family medicine is gathering momentum in undergraduate studies in spain. teaching methods, assessment tools and the practicability of new programs need to be explored. aims: to assess the effectiveness of an undergraduate family medicine training program; to determine the reliability and validity of tests of concordance scripts. material & methods: a quasi-experimental "before-after" study with 20 students. training program: a 60-hour course focusing on areas of knowledge, clinical reasoning, decision making and communication using a problem-based approach. measurements: multiple choice questions (mcq), concordance scripts tests (cs) and standardized patients (cc). 10 family physicians designed the cs tests (face and consensus validity). communication skills were assessed with a low difficulty clinical case simulation with a standardized patient. the session was videotaped and we used the gatha questionnaire to rate behaviours. student satisfaction was measured by a questionnaire. results: the differences between pre&post situations (wilcoxon) were: mcq: 14.45±2.7 - 17.2±2.4 (p=0.003); cs: 15.97±1.56 -17.93±2.16 (p<0.0001) and cc: 14.45±3.8- 18.55±3.3 (p=0.001). the reliability of cs test was: alpha: 0.96 and icc: 0.7876. a high degree of student satisfaction was detected with all the activities, materials and teachers. conclusions: the course was practicable and well-received. students noted improvements in knowledge acquisition and in their ability to apply this knowledge to clinical situations. their communication skills also improved after the course. cs is a valid and reliable test.
Análisis Numérico de la Convección Mixta en un Conducto Horizontal de Sección Rectangular Tridimensional que Encierra un Escalón
Barbosa-Salda?a,Juan G; Jiménez-Bernal,José A; Gutiérrez-Torres,Claudia del C; Moreno-Pacheco,Luis A;
Información tecnológica , 2007, DOI: 10.4067/S0718-07642007000600002
Abstract: laminar mixed convection over a backward-facing step is studied and presented in this work. a finite volume discretization technique is used to solve the momentum and energy equations. the simple algorithm is used to link the pressure distribution and velocity field inside the computational domain. the buoyancy forces affecting the velocity and temperature distributions are simulated for constant air flow and constant reynold number (re=200) for a mixed convective flow (ri=3) and the results are compared with those of pure force convective flow (ri=0). the results indicate that the re-circulation zones at the vicinity of the back step are reduced if the buoyancy effects are considered. it is concluded that the flow is highly tridimensional.
Estudio numérico-experimental de zona de separación en conducto rectangular con escalón
Morales Contreras, Oscar Adrián;Barbosa Salda?a, Juan Gabriel;Jiménez Bernal, José Alfredo;Gutiérrez Torres, Claudia del Carmen;Moreno Pacheco, Luis Alfonso;Quinto Diez, Pedro;
Ingeniería mecánica, tecnología y desarrollo , 2010,
Abstract: the separation and reattachment for a laminar flow through of a forward facing step channel (ffs) was numerically and experimentally studied in this work. three different reynolds numbers (269, 365, 530) were analyzed and in order to considered the strong flow tri-dimensionality, the channel aspect ratio was set equal to four (ra=4). hence the relevance and importance of the present work. the numerical study was done by means of the software fluent 6.3?, while the experimental study was carried out using the particle image velocimetry (piv) and a method of smoke visualization. the results showed that the height of the separation zone is not influenced by the reynolds, whereas its length depends on the u-velocity. the comparison of the numerical and experimental results is acceptable, for example, when measuring at the center of the channel, the height of the separation zone is 0.74h and 0.71h for experimental and numerical analysis respectively, having a difference around 4%.
Nevus azul prostático: Aportación de un nuevo caso
Garrido Abad,Pablo; Jiménez Gálvez,Milagros; Fernández Arjona,Manuel; Herranz Fernández,Luis Miguel; Bocardo Fajardo,Gloria; Herrero Torres,Lorenzo; Pereira Sanz,Ignacio;
Archivos Espa?oles de Urología (Ed. impresa) , 2007, DOI: 10.4321/S0004-06142007000500017
Abstract: objective: to state the scarce incidence of this prostatic pathology and the relative confusion with terminology applied to the presence of intraprostatic melanin pigments. methods/results: 66-year-old patient with elevated serum psa with the diagnosis of prostatic blue nevus after biopsy. conclusions: this diagnostic finding has not clinical or prognostic significance. they are benign lesions that must not be confused with other similar more aggressive lesions.
Ordenamiento ecológico comunitario: un modelo de manejo de recursos naturales para el desarrollo comunitario. Estudio de caso ejido Potrero de los López, Aguascalientes
Meraz Jiménez, Antonio de Jesús;Galarza Mendoza, José Luis;Sosa Ramírez, Joaquín;Ponce Montoya, Amalio;Torres González, Jorge Alejandro;
Revista Chapingo. Serie ciencias forestales y del ambiente , 2011, DOI: 10.5154/r.rchscfa.2010.11.044
Abstract: natural resource management based on participatory community-based environmental management (pcem) is a support tool to implement rural development projects at the community level, from a regional planning framework through the use and application of technical tools to analyze the potentials and limits of natural resources and the use of a methodology to drive participatory processes. management elements and production processes were characterized and defined using landform, land use and vegetation through field samplings of 1000 m2 plots for forests and 1 m2 ones for pasturelands, validated by sub-supervised spot image classification and the edaphological conditions proposed by inegi (1978). through participatory planning workshops conducted in 2006, the results of the technical analysis were compared and validated and the community proposals were identified. among the strategic guidelines are: appropriate livestock, agricultural, forestry and ecotourism uses; conservation, reconstruction of water bodies; and restoration of degraded ecosystems, which is based on taking decisions such as establishing buffer zones between use areas and conservation areas where the original ecosystem remains.
Subregistro de defunciones de menores y certificación de nacimiento en una muestra representativa de los 101 municipios con más bajo índice de desarrollo humano en México
Hernández,Bernardo; Ramírez-Villalobos,Dolores; Duarte,María Beatriz; Corcho,Alexander; Villarreal,Gabriela; Jiménez,Aline; Torres,Luis Manuel;
Salud Pública de México , 2012, DOI: 10.1590/S0036-36342012000400009
Abstract: objective: to measure the underregistry of mortality in children under five years old, and the coverage of the birth certificate (bc) in municipalities with very low human development index (hdi) in mexico. materials and methods: we studied all deaths of children under five years old occurred in 2007 and all births occurred in 2007 and 2008 in a sample of 20 municipalities with very low hdi in mexico. we conducted an intentional search of births and deaths. results: we identified 12 additional deaths not included in official registries, for an underregistration of 22.6%, and 68.1% of births did not have a bc. lack of bc was more frequent if the mother did not speak spanish, if she did not have seguro popular if the birth was attended by a traditional midwife. conclusions. it is necessary to strengthen the registry of deaths and births in municipalities with very low hdi.
Análisis Numérico de la Convección Mixta en un Conducto Horizontal de Sección Rectangular Tridimensional que Encierra un Escalón Numerical Analysis for a Mixed Convective Flow Over a Tri-Dimensional Horizontal Backward-Facing Step
Juan G Barbosa-Salda?a,José A Jiménez-Bernal,Claudia del C Gutiérrez-Torres,Luis A Moreno-Pacheco
Información Tecnológica , 2007,
Abstract: Se realiza un estudio sobre la convección mixta para flujo laminar sobre un conducto horizontal que encierra un escalón. Las ecuaciones de momento y energía se discretizan usando la técnica de los volúmenes finitos. Se utiliza el algoritmo SIMPLE para enlazar los campos de velocidad y presión en el dominio computacional. La influencia de las fuerzas de flotación (Ri=3) sobre los campos de velocidad y de temperaturas, se simulan para un flujo de aire y un número de Reynolds constante (Re=200) y los resultados se comparan con los de flujo a convección forzada (Ri=0). Los resultados mostraron que las zonas de recirculación adyacentes al escalón, se ven reducidas cuando se consideran las fuerzas de flotación. Se concluye que el flujo es altamente tridimensional. Laminar mixed convection over a backward-facing step is studied and presented in this work. A finite volume discretization technique is used to solve the momentum and energy equations. The SIMPLE algorithm is used to link the pressure distribution and velocity field inside the computational domain. The buoyancy forces affecting the velocity and temperature distributions are simulated for constant air flow and constant Reynold number (Re=200) for a mixed convective flow (Ri=3) and the results are compared with those of pure force convective flow (Ri=0). The results indicate that the re-circulation zones at the vicinity of the back step are reduced if the buoyancy effects are considered. It is concluded that the flow is highly tridimensional.
Efectos a corto plazo de la contaminación atmosférica sobre la mortalidad: resultados del proyecto EMECAM en Cartagena, 1992-96
Guillén Pérez José Jesús,Cirera Suárez Lluís,García-Marcos álvarez Luis,Jiménez Torres Enrique
Revista Espa?ola de Salud Pública , 1999,
Abstract: FUNDAMENTO: Los problemas de contaminación atmosférica se han venido percibiendo en la ciudad de Cartagena desde la década de los setenta, con episodios puntuales de altos niveles de SO2 y partículas. Nos proponemos evaluar, utilizando la metodología del proyecto EMECAM, los efectos agudos de la contaminación atmosférica por SO2 y partículas sobre la mortalidad diaria en la ciudad de Cartagena de 1992 a 1996. MéTODOS: se relacionan las defunciones diarias por todas las causas excepto las externas, en población general y en la de 70 y más a os, por causas cardiovasculares y por causas respiratorias, con la contaminación atmosférica por dióxido de azufre y partículas, en el período1992-1996, utilizando modelos de Poisson autorregresiva que controlan por estacionalidad, meteorología, calendario, gripe, eventos especiales y retardos. RESULTADOS: En el periodo en estudio se ha producido una disminución de la contaminación por SO2, con respecto a a os anteriores, lo que no ha sido evidente para la contaminación por partículas. Los análisis muestran asociaciones significativas en las defunciones totales sin accidentes en mayores de 69 a os y el valor promedio de partículas, estas son las defunciones cardiovasculares del mes de mayo a octubre. En el semestre frío, encontramos asociación estadísticamente significativa positiva en el valor máximo horario diario de las partículas y las muertes por enfermedades cardiocirculatorias y respiratorias. Sin embargo no hay consistencia en las asociaciones al evaluar la fiabilidad de los modelos.
Page 1 /65202
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.