Investigación
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Artes y letras [362]
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Recent Submissions
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Promoting action control and coping planning to improve hand hygiene
(2015-09)Background We examined a brief educational intervention addressing hand hygiene self-regulatory mechanisms, and evaluated which psychological mechanisms may lead to hand hygiene behaviours. Methods Two hundred forty ... -
Estudios sobre la estabilidad del virus del rayado fino del maíz por degradación enzimática del ARN viral y microscopia electrónica de las partículas
(1986)The stability of "Maize Rayado Fino Virus" capsids was studied correlating enzymatic degradation analysis of the RNA in full capsids with electron microscopy of negatively stained particles. The great thermal stability of ... -
Identificación y selección de híbridos somáticos obtenidos mediantefusión de protoplastos
(2009)El poder seleccionar eficientemente las plantas híbridas producidas a partir de fusión de protoplastos es fundamental. Se han logrado muchos avances en el tema en las últimas décadas. Entre los métodos utilizados para la ... -
Fatty acids and triacylglycerols in the mesocarp and kernel oils of maturing Costa Rican Acrocomia aculeata fruits
(2019-03)Total lipids, fatty acids, and triacylglycerols in mesocarp and kernels from Costa Rican Acrocomia aculeata fruits were characterized at three maturity stages. C16:0 and C18:1n9 were the most abundant fatty acids in the ... -
Imipramine attenuates neuroinflammatory signaling and reverses stress-induced social avoidance
(2015-05)Psychosocial stress is associated with altered immunity, anxiety and depression. Previously we showed that repeated social defeat (RSD) promoted microglia activation and social avoidance behavior that persisted for 24 ... -
Synthesis and Evaluation of Aromatic Surfactants as Potential Antibacterial and Cytotoxic Agents
(2019-01)Two ether and one ester derivatives of the 4-nitro-3-hydroxybenzoic acid were synthesized and characterized. The in vitro antimicrobial and cytotoxic activities of the three novel compounds were also evaluated. The ... -
Biodiversity, Agrobiodiversity and Ecosystem Change
(2011)Biodiversity is the variety of life, in all its forms. It provides the foods and medicines used around the world today, the fiber for clothes, and many of the materials for shelter and houses, and a plethora of other goods ... -
The Interoceanic Canal and Boundaries in Central America: The case of the San Juan River
(1994)The global political map is undergoing a process of rapid change as former states disintegrate and new states emerge. Territorial change in the form of conflict over land and maritime boundaries is inevitable but the ... -
Endogenous hormone levels in explants and in embryogenic and non-embryogenic cultures of carrot
(2001)Carrot (Daucus carota L. F1 hybrid Starca) excised hypocotyls were cultured on Murashige and Skoog medium with and without 2,4‐dichlorophenoxy acetic acid (2,4‐D) to determine the effect of this plant growth regulator on ... -
Hormonal status of maize initial explants and of the embryogenic and non-embryogenic callus cultures derived from them as related to morphogenesis in vitro
(2001)Endogenous hormone levels (indole-3-acetic acid [IAA], abscisic acid [ABA], gibberellins 1, 3 and 20 [GAs], zeatin/zeatin riboside [Z/ZR] and N6[Δ2-isopentenyl] adenine/N6[Δ2-isopentenyl] adenosine; [iP/iPA]) were analysed ... -
Relationship between endogenous hormone levels of grapevine callus cultures and their morphogenetic behaviour
(2000-01-01)Dark callus cultures from leaves and anthers of three grapevine genotypes (Seyval blanc, Riesling and Trollinger) were propagated in vitro for almost two years on medium deprived of growth regulators. Three different callus ... -
Endogenous hormonal status of embryogenic callus in cocos (Cocos nucifera L.) explants
(1997-01-01)Endogenous hormonal concentrations of Z/ZR, IP/IPA, ABA and free IAA were determined in Cocos in vitro cultures during the period of embryogenic callus (calloid) formation and in selected tissues after 16 weeks grown on ... -
Propagación in vitro de Phalaenopsis (Orchidaceae) mediante el cultivo de secciones de ejes florales después de la senescencia de las flores
(1996-01-01)Segmentos nodales provenientes de inflorescencias senescentes de híbridos de Phalaenopsis fueron desinfectados dos veces y colocados en un medio sólido MS modificado bajo en calcio y con varios aditivos orgánicos (vitaminas, ... -
Endogenous hormonal status of embryogenic callus in cocos (Cocos nucifera L.) explants
(1996-01-01)The application of optimum concentrations of hormones according to specific culture stages plays an important role, especially in plants which are concerned lo be recalcitrant for propagation in vitro, like Cocos nucifera ... -
Consultas de información de medicamentos en un hospital de trauma costarricense de diciembre del 2013 a junio del 2014
(2016)Objetivo: Caracterizar las consultas de información de medicamentos recibidas por el Centro de Información de Medicamentos del Hospital del Trauma. Método: Estudio descriptivo prospectivo realizado de diciembre del 2013 ... -
Regeneración in vitro mediante embriogénesis somática de variedades de cítricos. I. Obtención de callo friable y suspensiones celulares de naranja dulce (Citrus sinensis) y naranja agria (Citrus aurantium) cultivadas en Costa Rica
(1995-03-31)In vitro plant regeneration of citrus through somatic embryogenesis. I. Establishment of friable calli and suspension cultures of local cultivars of sweet orange (Citrus sinensis) and sour orange (Citrus aurantium). Friable ... -
Synergistic effects of social support and self-efficacy on dietary motivation predicting fruit and vegetable intake
(2015-04)Background: Self-efficacy and social support are considered relevant predictors of fruit and vegetable intake. This study examines whether the effect of self-efficacy on fruit and vegetable intake is mediated by intention ... -
Algunas reflexiones de la gestión de conocimiento como estrategia de cambio institucional
(2016-11)El cambio supone la adaptación a las nuevas condiciones del entorno. Es precisamente la búsqueda de nuevos significados e interpretaciones, como las instituciones transforman sus procesos internos, sus funciones y estructuras, ... -
Sustentabilidad urbana en espacios territoriales: caso municipio San José, Costa Rica
(2018-11-09)El tema del desarrollo sustentable y sustentabilidad se encuentran en creciente importancia, desde que en 1987 (Informe Brundtland), sin embargo, aún su avance teórico y metodológico se encuentra en proceso de desarrollo. ... -
La investigación como herramienta para la gestión del conocimiento organizacional
(2017-11)Los temas de investigación relacionados al estudio de las organizaciones, permiten identificar aspectos relevantes a estudiar en las mismas, ante las transformaciones de los tiempos actuales, cada más dinámicos y globales, ...
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