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Search Results: 1 - 10 of 570994 matches for " Bárbara C; Sánchez "
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Bibliotecas virtuales adaptables: un desafío de la sociedad de la información
Sánchez Vignau,C. Bárbara Susana; Vargas Villafuerte,Manuela Marina;
ACIMED , 2006,
Abstract: the development of information technologies is an indicative of the evolution of the information systems. the origin of the use of internet, based on the traditional models still in force, has developed this task. virtual libraries are a necessary information resource for the access and management of digitalized information, and the last few years witnessed the efforts made by several organizations to promote their development. nevertheless, an improvement of the user/system integration is needed. a new theoretical design, adaptable to virtual libraries model, is proposed
Valoración germinativa de 20 accesiones de leguminosas almacenadas en condiciones desfavorables Germinative evaluation of 20 legume accessions stored under unfavorable conditions
Bárbara C Mu?oz,J. A Sánchez,Laura A Montejo,Yolanda González
Pastos y Forrajes , 2009,
Abstract: Se valoró la respuesta germinativa de 20 accesiones de leguminosas procedentes de diferentes tiempos de almacenamiento, en condiciones inadecuadas de humedad y temperatura, y sometidas a tratamientos de escarificación térmica y ácida antes de la siembra, con distintas temperaturas del sustrato. Independientemente del tiempo de almacenamiento, el contenido de humedad de las semillas fue inferior al 15%. Las semillas de las accesiones con más de 12 a os presentaron porcentajes de germinación inferiores al 10% para todos los tratamientos de siembra ensayados, excepto en Centrosema pubescens cv. CIAT 438, Crotalaria sp. cv. Derecha, Crotalaria spectabilis, Crotalaria brownii cv. 687, Macroptilium atropurpureum, Stylosanthes guianensis cv. CIAT 136 y Mimosa invisa. El resto de las accesiones presentaron diferentes grados de pérdida de la viabilidad. Las de mejor respuesta germinativa fueron Crotalaria sp. cv. Derecha, M. invisa e Indigofera sp., debido a que alcanzaron porcentajes de germinación final superiores al 70% para, al menos, uno de los termoperíodos de siembra ensayados. An evaluation was made of the germinative response of 20 legume accessions from different storage times, under inadequate humidity and temperature conditions, and subject to thermal and acid scarification treatments before seeding, with different temperatures of the substratum. Independently from the storage time, the moisture content of the seeds was lower than 15%. The seeds from the accessions with more than 12 years showed germination percentages lower than 10% for all the essayed planting treatments, except in Centrosema pubescens cv. CIAT 438, Crotalaria sp. cv. Derecha, Crotalaria spectabilis, Crotalaria brownii cv. 687, Macroptilium atropurpureum, Stylosanthes guianensis cv. CIAT 136 and Mimosa invisa. The other accessions showed different degrees of viability loss. The best germinative response occurred in Crotalaria sp. cv. Derecha, M. invisa and Indigofera sp., because they reached final germination percentages higher than 70% for, at least, one of the studied seeding thermoperiods.
Bibliotecas virtuales adaptables: un desafío de la sociedad de la información Adaptable virtual libraries: An information society challenge
C. Bárbara Susana Sánchez Vignau,Manuela Marina Vargas Villafuerte
ACIMED , 2006,
Abstract: El desarrollo de las tecnologías de información es un indicativo de la evolución de los sistemas de información; en especial, la aparición y uso de Internet han revolucionado el quehacer, a partir de los modelos tradicionales vigentes hasta el momento. Las bibliotecas virtuales son un recurso de información necesario para el acceso y manejo de información digitalizada y los últimos a os son testigos de los esfuerzos que han hechos muchas organizaciones para potenciar su desarrollo. Sin embargo, es preciso mejorar la integración de los usuarios con estos sistemas. Se propone un nuevo modelo teórico para el dise o de bibliotecas virtuales adaptables The development of information technologies is an indicative of the evolution of the information systems. The origin of the use of Internet, based on the traditional models still in force, has developed this task. Virtual libraries are a necessary information resource for the access and management of digitalized information, and the last few years witnessed the efforts made by several organizations to promote their development. Nevertheless, an improvement of the user/system integration is needed. A new theoretical design, adaptable to virtual libraries model, is proposed
Tratamientos pregerminativos de hidratación-deshidratación de las semillas y sus efectos en plantas de interés agrícola
Jorge A. Sánchez,Ramón Orta,Bárbara C. Mu?oz
Agronomía Costarricense , 2001,
Abstract:
Tratamientos robustecedores de semillas para mejorar la emergencia y el crecimiento de Trichospermun mexicanum, árbol tropical pionero
Jorge A. Sánchez,Bárbara C. Mu?oz,Luis Hernández,Laura Montejo
Agronomía Costarricense , 2006,
Abstract: Se estudió la emergencia y el crecimiento de plantas de Trichospermum mexicanum en condiciones de vivero y de campo y cuyas semillas fueron sometidas a tratamientos pregerminativos de hidratación-deshidratación y choque térmico (semillas robustecidas). Todos los tratamientos robustecedores fueron adecuados para incrementar la emergencia y el crecimiento de las plantas con relación al testigo; alcanzándose los mejores resultados con la hidratación parcial en agua, hasta 2 h antes del inicio de la germinación visible, en combinación con un choque térmico a 40oC durante una 1 h. El crecimiento de las plántulas se afectó significativamente cuando la siembra se realizó a plena exposición solar en condiciones de vivero, independientemente del tratamiento pregerminativo aplicado. En cambio, la aclimatización de las plántulas en condición de sombra parcial, previo a su exposición en insolación total, resultó un procedimiento favorable para aumentar el crecimiento de la especie en condiciones de vivero y de campo. También, la combinación de los tratamientos robustecedores incrementó la floración y producción de semillas. La efectividad de la combinación de los tratamientos robustecedores para mejorar el crecimiento de las plantas en condiciones de campo fue demostrado en esta contribución.
Valoración germinativa de 20 accesiones de leguminosas almacenadas en condiciones desfavorables
Mu?oz,Bárbara C; Sánchez,J. A; Montejo,Laura A; González,Yolanda; Reino,J;
Pastos y Forrajes , 2009,
Abstract: an evaluation was made of the germinative response of 20 legume accessions from different storage times, under inadequate humidity and temperature conditions, and subject to thermal and acid scarification treatments before seeding, with different temperatures of the substratum. independently from the storage time, the moisture content of the seeds was lower than 15%. the seeds from the accessions with more than 12 years showed germination percentages lower than 10% for all the essayed planting treatments, except in centrosema pubescens cv. ciat 438, crotalaria sp. cv. derecha, crotalaria spectabilis, crotalaria brownii cv. 687, macroptilium atropurpureum, stylosanthes guianensis cv. ciat 136 and mimosa invisa. the other accessions showed different degrees of viability loss. the best germinative response occurred in crotalaria sp. cv. derecha, m. invisa and indigofera sp., because they reached final germination percentages higher than 70% for, at least, one of the studied seeding thermoperiods.
Presentación de dos casos de traumatismo palpebral severo Presentation of two cases of severe palpebral traumas
Alexander Pérez Llanes,Francis Yalile Cárdenas Pérez,Yaima Hernández Sánchez,Bárbara Estrada Amador
Revista Cubana de Oftalmolog?-a , 2012,
Abstract: Los traumatismos de los anejos oculares son frecuentes, debido a la ubicación anatómica de estas estructuras y cumplir con una de sus principales funciones de protección del globo ocular. Se pueden clasificar en afecciones traumáticas de párpados, conjuntiva, órbita y traumas del aparato lagrimal. Según los datos aportados por el United States Eye Injury Registry, las lesiones de los anejos oculares constituyen el 5 % de todos los traumas oculares y las más frecuentes con 81 % son las laceraciones canaliculares. Se presentan dos casos de pacientes masculinos con diagnóstico de trauma palpebral severo (avulsión palpebral) que fueron atendidos en el servicio de urgencia y recibieron tratamiento quirúrgico con evolución satisfactoria. El reporte de estos casos nos permite un mejor manejo en el diagnóstico y tratamiento de los traumas palpebrales severos. The ocular adnexal traumas are common due to the anatomical location of these structures, and the fulfilling of one of its main duties, that is, the protection of the eyeball. They are classified into traumatic conditions of the eyelids, the conjunctiva, the orbit, and lachrymal system traumas. According to data provided by the United States Eye Injury Registry, the ocular adnexal injuries account for 5 % of all ocular traumas, and the most common are canalicular lacerations with 81 %. Two cases of male patients diagnosed with severe eyelid trauma (eyelid avulsion) were presented. They had been treated in the emergency department; they had undergone surgical treatment with satisfactory results. The report of these cases allows us to better manage the diagnosis and treatment of severe palpebral traumas.
Estrategia para desarrollar habilidades intelectuales en la asignatura Bioquímica I en estudiantes de medicina
Valdés de la Rosa,Cecilia; álvarez Aguilar,Nivia C; Valls García,Martha; Valle Sánchez,Tamara; Fajardo Cisneros,Bárbara;
Educaci?3n M??dica Superior , 2001,
Abstract: higher medical education prepares students for becoming broad-profile physicians so he correct assimilation of knowledge and the development of intellectual and practical skills is necessary. this research paper presents a strategy for the development of intellectual skills in biochemistry i subject because the development of such skills makes the students play an active role in the teaching-learning process, which will positively affects their intellectual development and help their professional skills. the effectiveness of the creation and development of these skills depends on a strategy where steps to follow to turn action into skill will be structured and the process will be carried out in a systematic, continuous and conscious way.
Síndrome de ovario poliquístico (SOP) y embarazo: Experiencia clínica
Villarroel,Ana Claudia; Echiburú,Bárbara; Riesco,Virginia; Maliqueo,Manuel; Cárcamo,Michael; Hitschfeld,Catalina; Sánchez,Fernando; del Solar,María Paz; Sir-Petermann,Teresa;
Revista médica de Chile , 2007, DOI: 10.4067/S0034-98872007001200005
Abstract: background: polycystic ovary syndrome (pcos) is an endocrine metabolic dysfunction closely associated with insulin resistance and obesity, which predisposes to pregnancy complications. aim: to report a prospective clinical experience in pcos patients who became pregnant after diet, exercise and metformin treatment intervention, and were followed up during the whole pregnancy. patients and methods: seventy pregnant pcos (ppcos) women and forty normal pregnant (np) women of similar age and with singleton pregnancies were included in the study. during gestational ages 10-16 and 22-28 weeks, a 2h, 75 g oral glucose tolerance test (ogtt) was performed with measurement of glucose and insulin in each sample. results: no differences were found in duration of gestation, weight gain during pregnancy, or systolic and diastolic blood pressure between ppcos and np women. there were significant differences in body mass index (bmi) at the initiation and in the third trimester of pregnancy between both groups. the incidence of gestational diabetes was significantly higher (p <0.01) in the pcos group (35.2%) compared to the control group (5.0%). the prevalence of small for gestational age (sga) infants tended to be higher (p =0.09) in the pcos group. during pregnancy, 2h glucose and insulin were significantly higher in ppcos than in np women. conclusions: pcos mothers showed a higher prevalence of gestational diabetes and sga newborns, which cannot be attributed to the weight gain during pregnancy, and seems to be more related to the bmi at the initiation of pregnancy, and to the pcos condition of the mothe
Desde la teoría a la praxis en las bibliotecas universitarias de hoy: El valor de las tres I: iniciativa, inventiva e inteligencia
Sánchez Vignau,Bárbara Susana;
ACIMED , 2008,
Abstract: the evolution of technological, cultural and scientific education′s settings demands new products, services and projects from the university libraries. however, little variations can be really perceived in the evolution of those libraries that fight to "obey" the good written theory within a changing and acute reality. the value of the three i′s: initiative, inventiveness and intelligence, is the goal and the working project of many libraries, therefore to share that know how is useful and necessary.
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