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Search Results: 1 - 10 of 466498 matches for " Marisol Ure?a Vargas "
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Razones de Consumo de Frutas y Vegetales en Escolares Costarricenses de una Zona Urbana
Urea Vargas,Marisol;
Revista Costarricense de Salud Pública , 2009,
Abstract: objective: to determine the reasons for consumption and non-consumption of fruits and vegetables in school students of an urban zone. methods: the present study is descriptive, cross-sectional and qualitative in nature. during 2004, seventy two schoolchildren between ten and twelve years of age, coming from the fifth and sixth grades of three schools in the municipalities of montes de oca and curridabat, province of san josé, participated in the study. the purpose of the work was to determine the reasons for fruit and vegetable intake. six focal groups were organized, three with girls and three with boys. the information was classified on the basis of content and matrices analysis, in which the most common opinions given by the children were considered, in addition to the concepts derived from dimensions established in the literature, and expert opinion on education and nutrition. results: the schoolchildren mentioned that the main reasons for consumption of both food groups are their physical characteristics. for vegetables, the physical characteristics were also a motive of rejection. other reasons for non-consumption are reduced availability at home, restaurants and school cafeterias, inadequate family nutritional habits, ignorance of the importance of intake of these foods, and a reduced buying ability. the schoolchildren acknowledge that fruits and vegetables are foods that contribute to good health, because in general they provide vitamins and minerals. however, they do not eat them on a daily basis because they prefer "junk foods". discussion: fruit and vegetable consumption is associated with several intrinsic and external factors that can increase or limit their intake.
Razones de Consumo de Frutas y Vegetales en Escolares Costarricenses de una Zona Urbana Reasons for Fruit and Vegetable Consumption in Costa Rican Students of an Urban Zone
Marisol Urea Vargas
Revista Costarricense de Salud Pública , 2009,
Abstract: Objetivo: Determinar cuáles son las razones del consumo y no consumo de frutas y vegetales por parte de los escolares de una zona urbana. Método: Estudio de tipo descriptivo, transversal y cualitativo. Participaron 72 escolares entre 10 y 12 a os de cuarto, quinto y sexto grado de tres escuelas de los cantones de Montes de Oca y Curridabat, de la provincia de San José, Costa Rica, en el a o 2004. Se realizaron 6 grupos focales, de los cuales 3 fueron con ni as y 3 con ni os. La información obtenida fue categorizada a partir del análisis de contenido y de matrices en las que se consideraron las opiniones más comunes dadas por los escolares, así como los conceptos derivados de las dimensiones establecidas en la literatura y las opiniones de expertos en educación y nutrición. Resultados: Los escolares refieren que la principal razón de consumo de frutas y vegetales, son las características físicas, para el caso de los vegetales estas características son también motivo de rechazo. Entre las razones de no consumo están la poca disponibilidad tanto en el hogar como en las sodas y comedores escolares, los inadecuados hábitos alimentarios familiares, el desconocimiento de la importancia del consumo de estos alimentos y un poder de compra restringido. Los escolares reconocen que las frutas y los vegetales son alimentos que contribuyen a la buena salud porque aportan de manera general vitaminas y minerales, no obstante, no los consumen diariamente porque prefieren la "comida chatarra". Discusión: El consumo de frutas y vegetales está asociado con una serie de factores intrínsecos y extrínsecos que potencian o limitan el consumo de estos alimentos. Objective: To determine the reasons for consumption and non-consumption of fruits and vegetables in school students of an urban zone. Methods: The present study is descriptive, cross-sectional and qualitative in nature. During 2004, seventy two schoolchildren between ten and twelve years of age, coming from the fifth and sixth grades of three schools in the municipalities of Montes de Oca and Curridabat, province of San José, participated in the study. The purpose of the work was to determine the reasons for fruit and vegetable intake. Six focal groups were organized, three with girls and three with boys. The information was classified on the basis of content and matrices analysis, in which the most common opinions given by the children were considered, in addition to the concepts derived from dimensions established in the literature, and expert opinion on education and nutrition. Results: The schoolchildren mentioned t
CARACTERIZACION CITOGENéTICA POR BANDAS R-REPLICATIVAS DE LA GUAGUA DE COLA (DYNOMIS BRANICKII)
Urea Vargas,Lisbeth Katherine; López Ortiz,Juan Bautista;
Revista Facultad Nacional de Agronomía, Medellín , 2010,
Abstract: dinomys branickii is also called tail guagua or ?pacarana?, is the second biggest living rodent of the world. due to man factors this rodent is actually endangered. according to hair colour and height have been proposed the existence of three subspecies: dinomys pacarana in brasil, dinomys gigas in colombia and dinomys branickii occidentalis in ecuador and colombia. eventhough morphological rating there have been made, no other cytogenetic reports exist to let know whether the three subspecies have same karyotype. the goal of this work was to make the karyotype of dynomis branickii using r-replicative bands through the incorporation of 5-bromo-2′-deoxyuridine (brdu). the cytogenetic study showed a chromosome number 2n=64 and a fundamental number fn=98. the result of the karyotype was organized in three groups as: a group with 1 chromosome metacentric pair and 11 chromosome submetacentric pairs, b group with 5 metacentric pairs, c group with 14 chromosome subtelocentric pairs, and sexual chromosome pair xy, where x chromosome is submetacentric and y subtelocentric. the ideogram was made with metaphase chromosomes on third stage of replication. the r-replicative banding revealed: the inactive behavior of the x chromosome like other mammalian females, and the smallest size in whole genome and late replication of the y chromosome. this cytogenetic evidence showed the karyotype and ideogram of this specie for first time, which supports future cytogenetic knowledge of other subespecies related.
CARACTERIZACION CITOGENéTICA POR BANDAS R-REPLICATIVAS DE LA GUAGUA DE COLA (DYNOMIS BRANICKII) CYTOGENETIC CHARACTERIZATION WITH R-REPLICATIVE BANDS OF TAIL GUAGUA (DYNOMIS BRANICKII)
Lisbeth Katherine Urea Vargas,Juan Bautista López Ortiz
Revista Facultad Nacional de Agronomía, Medellín , 2010,
Abstract: La Dinomys branickii llamada guagua de cola ó “Pacarana”, es el segundo roedor más grande del mundo. Debido a factores antrópicos este roedor se encuentra en peligro de extinción. De acuerdo a su pelaje y tama o se ha propuesto la existencia de tres subespecies: D. pacarana en Brasil, D. gigas en Colombia y D. branickii occidentalis en Ecuador y Colombia. A pesar de que se han hecho valoraciones morfológicas no existen estudios citogenéticos detallados que permitan determinar si las tres subespecies tienen el mismo cariotipo. El presente trabajo tuvo como objetivo determinar el cariotipo de la especie Dynomis branickii usando bandeo cromosómico R-replicativo mediante la incorporación de 5-Bromo 2′deoxi-Uridina (BrdU). Los resultados citogenéticos mostraron un número cromosómico 2n=64 y un número fundamental NF=98. El hallazgo del cariotipo se presentó en tres grupos: el A con 1 par metacéntrico y 11 pares de cromosomas submetacéntricos, el B con 5 pares metacéntricos, el C con 14 pares subtelocéntricos y el par sexual XY, donde el X es submetacéntrico y el Y subtelocéntrico. El idiograma se construyó tomando metafases localizadas en estadio III de replicación. El bandeo R-replicativo reveló el carácter inactivo del cromosoma X suplementario como se observa en otras hembras de mamíferos; de otra parte, el cromosoma Y resultó ser el más peque o del genoma y de replicación tardía. Con este resultado se estudia por primera vez el cariotipo y el idiograma de esta especie y servirá de base para compararlo con futuros estudios de las otras subespecies estudiadas. Dinomys branickii is also called tail guagua or “Pacarana”, is the second biggest living rodent of the world. Due to man factors this rodent is actually endangered. According to hair colour and height have been proposed the existence of three subspecies: Dinomys pacarana in Brasil, Dinomys gigas in Colombia and Dinomys branickii occidentalis in Ecuador and Colombia. Eventhough morphological rating there have been made, no other cytogenetic reports exist to let know whether the three subspecies have same karyotype. The goal of this work was to make the karyotype of Dynomis branickii using R-replicative bands through the incorporation of 5-bromo-2′-deoxyuridine (BrdU). The cytogenetic study showed a chromosome number 2n=64 and a fundamental number FN=98. The result of the karyotype was organized in three groups as: A group with 1 chromosome metacentric pair and 11 chromosome submetacentric pairs, B group with 5 metacentric pairs, C group with 14 chromosome subtelocentric pairs, and sexual chromosome pai
Anorexia y bulimia: caracterización y sistematización de la experiencia de intervención de una Clínica de Adolescentes
Morales,Alberto; Ramírez,Walter; Urea,María Elena; Sevilla Vargas,Angela; Uma?a,Pamela; Chaves Víquez,Rocío;
Acta Pediátrica Costarricense , 2002,
Abstract: objetivo: caracterizar la población de adolescentes con trastornos de la alimentación y presentar el modelo de intervención de la clínica de adolescentes del hospital nacional de ni?os. pacientes: 22 adolescentes seleccionados con el diagnóstico de anorexia o bulimia. resultados: se encontraron los siguientes aspectos relevantes: dinámica familiar disfuncional donde sobresale conflictos a nivel del subsistema parental, adolescentes con rendimiento escolar alto previo a la enfermedad, síntomas ansiosos y preocupación por la imagen corporal desde la infancia, como antecedentes premórbidos. se da una asociación significativa de la enfermedad con trastornos afectivos, trastornos ansioso y con conductas de riesgo de los adolescentes. los trastornos más frecuentemente encontrados a través de exámenes de laboratorio son: anemia, enfermedad eutiroidea, alteraciones del sodio y de las gonadotropinas hipofisiarias. el modelo de intervención planteado enfatiza sobre el abordaje interdisciplinario y de la necesidad de complementar la intervención con opciones adecuadas para el internamiento.
Crude extracts of bacterially expressed dsRNA can be used to protect plants against virus infections
Francisco Tenllado, Belén Martínez-García, Marisol Vargas, José Díaz-Ruíz
BMC Biotechnology , 2003, DOI: 10.1186/1472-6750-3-3
Abstract: We have developed an in vivo expression system to produce large amounts of virus-derived dsRNAs in bacteria, with a view to providing a practical control of virus diseases in plants. Partially purified bacterial dsRNAs promoted specific interference with the infection in plants by two viruses belonging to the tobamovirus and potyvirus groups. Furthermore, we have demonstrated that easy to obtain, crude extracts of bacterially expressed dsRNAs are equally effective protecting plants against virus infections when sprayed onto plant surfaces by a simple procedure. Virus infectivity was significantly abolished when plants were sprayed with French Press lysates several days before virus inoculation.Our approach provides an alternative to genetic transformation of plant species with dsRNA-expressing constructs capable to interfere with plant viruses. The main advantage of this mode of dsRNA production is its simplicity and its extremely low cost compared with the requirements for regenerating transgenic plants. This approach provides a reliable and potential tool, not only for plant protection against virus diseases, but also for the study of gene silencing mechanisms in plant virus infections.Posttranscriptional gene silencing (PTGS) in plants is a homology-dependent RNA degradation system designed to act as a natural defence barrier against virus infections [1]. Mechanistically similar processes are known in fungi (quelling, [2]) and animals (RNA interference, [3]) and are considered a surveillance mechanism against mobilization of transposons [4,5]. Moreover, it has been widely conjectured that RNAi may also serve as an antiviral system in vertebrates [6,7]. It is even possible that these related processes are part of an ancient, RNA-based regulatory network aimed at regulating gene expression [8,9]. In addition, induction of RNA silencing in different organisms can be activated by exogenously supplied double-stranded RNA (dsRNA) [10,11]. In this sense, RNAi has become
Transient expression of homologous hairpin RNA interferes with PVY transmission by aphids
Marisol Vargas, Belén Martínez-García, José Díaz-Ruíz, Francisco Tenllado
Virology Journal , 2008, DOI: 10.1186/1743-422x-5-42
Abstract: One of the most efficient mechanisms by which plants protect themselves from viruses is the specific RNA-dependent silencing pathway termed post-transcriptional gene silencing (PTGS). In certain circumstances, the RNA silencing machinery recognizes several features of viral infections involving the formation of double-stranded (ds) RNA and initiates a response that degrades viral RNA and eventually enables the plant to recover from virus infection [1]. This principle can be manipulated by biotechnologists to confer resistance to crops against virus diseases in several ways. Several studies have demonstrated that inverted repeat constructs encoding self-complementary RNAs (hairpin RNAs) can effectively induce RNA silencing and lead to high resistance frequencies in transgenic plants [2,3]. However, questions concerning the potential ecological risk of virus-resistant transgenic plants, including genetic flow and reversal of silencing by viral suppressors, have so far significantly limited its use [4]. As an alternative approach, we and others have previously shown that exogenously supplied dsRNA, or vectors expressing it, derived from viral sequences can specifically interfere with virus infection in non-transgenic plants [5-7]. It was proposed that the effect mediated by direct application of dsRNA onto plant surfaces concurrent to mechanical inoculation of the virus resembles the analogous phenomenon of RNA interference (RNAi) observed in animals [8,9]. The interfering dsRNA would mimic double-stranded forms of RNA produced during virus replication, triggering the initiation step of PTGS. This may lead to the production of 21 to 24 nucleotides duplexes (small interfering RNAs, siRNAs) which are incorporated into a nuclease complex responsible for the degradation of the cognate viral RNA [1]. Thus, the invading virus containing sequences homologous to the dsRNA is recognized and degraded by the plant's defence mechanism. This non-transgenic, RNAi-based approach coul
The Application of the Generalized Finite Difference Method (GFDM) for Modelling Geophysical Test  [PDF]
Angel Muelas, Eduardo Salete, Juan José Benito, Francisco Urea, Luis Gavete, Miguel Urea
Journal of Geoscience and Environment Protection (GEP) , 2019, DOI: 10.4236/gep.2019.74001
Abstract: The possibility of using a nodal method allowing irregular distribution of nodes in a natural way is one of the main advantages of the generalized finite difference method (GFDM) with regard to the classical finite difference method. Moreover, this feature has made it one of the most-promising meshless methods because it also allows us to reduce the time-consuming task of mesh generation and the numerical solution of integrals. This characteristic allows us to shape geological features easily whilst maintaining accuracy in the results, which can be a source of great interest when dealing with this kind of problems. Two widespread geophysical investigation methods in civil engineering are the cross-hole method and the seismic refraction method. This paper shows the use of the GFDM to model the aforementioned geophysical investigation tests showing precision in the obtained results when comparing them with experimental data.
CONSEJOS PSICOLóGICO-DEPORTIVOS PARA EL FUTBOLISTA
Pedro Urea Bonilla
Revista en Ciencias del Movimiento Humano y Salud , 2006,
Abstract: En este artículo se ofrece una serie de consejos psicológico-deportivos para el futbolista. En resumen, se presentan y discuten algunos factores psicológicos determinantes de su rendimiento. El texto se ofrece en forma de tesis seguida de consejos prácticos. Finalmente, se brinda algunas consideraciones relacionadas con el trabajo psicológico. El propósito fundamental de esta guía es ayudar al futbolista, facilitándole algunos consejos que le permitan expresar su verdadero talento en la cancha. La guía es mucho más provechosa si se trabaja con el acompa amiento de un psicólogo deportivo.
CALIDAD DE VIDA, SENTIDO DE COHERENCIA Y NIVELES DE SEDENTARISMO EN ACADéMICOS (AS) Y ADMINISTRATIVOS (AS) DEL CAMPUS PRESBíTERO BENJAMíN Nú EZ, UNA
Pedro Urea Bonilla
Revista en Ciencias del Movimiento Humano y Salud , 2008,
Abstract: El propósito de este estudio fue analizar la Calidad de Vida de académicos (as) y administrativos (as) del Campus Presbítero Benjamín Nú ez de la Universidad Nacional, Costa Rica. Asimismo, valorar la influencia de los factores Sentido de Coherencia y Ejercicio Físico en la Calidad de Vida de los supracitados trabajadores (as). En el estudio participó un grupo de 37 académicos (as) y 30 administrativos (as). Se aplicó el cuestionario de Calidad de Vida SF-36, la escala de Sentido de Coherencia y un cuestionario para medir hábitos relacionados con el Ejercicio Físico. Los resultados encontrados mostraron en general valores correspondientes a una Calidad de Vida relativamente buena. Similar fue la valoración que se hizo en cuanto al Sentido de Coherencia. Asimismo, se encontró relaciones significativas entre algunos aspectos del Sentido de Coherencia y de la Calidad de Vida. También, se evidenció que las personas que realizan Ejercicio Físico, comparadas con las que no lo hacen, poseen una mejor Calidad de Vida. Se concluyó de manera general que, aunque la Calidad de Vida y el Sentido de Coherencia fueron relativamente buenos, es necesario dise ar y ejecutar propuestas con el propósito de mejorar ambos aspectos. En este sentido, el Ejercicio Físico se delineó como uno de los pilares a partir de los cuales se podría ejecutar propuestas innovadoras para la salud de los (as) trabajadores (as) universitarios(as), todo ello, en el marco de lo que se denomina “Universidades Saludables”..
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