Browsing Revista de Biología Tropical by Title
Now showing items 1-20 of 145
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Aberraciones cromosómicas en trabajadoras expuestas a plaguicidas
(Revista de Biología Tropical 52(3) p.623-628, 2004-12-15)The purpose of this work was to determine if the occupational exposure to those pesticides used at banana plantations’ packaging plants produces genetic damage to somatic cells of female workers. Chromosomal aberrations ... -
Abundance of Petrolisthes armatus (Crustacea: Porcellanidae) on a tropical estuarine intertidal rocky beach, Gulf of Nicoya estuary, Costa Rica
(2016-09-22)Se estudió, de diciembre de 1997 a noviembre de 1998 (14 fechas), la población del cagrejo porcelánido Petrolisthes armatus en dos sitios en una playa rocosa de entre mareas en el Golfo de Nicoya, costa pacífica de Costa ... -
Abundancia y fluctuaciones de aves limícolas (Charadriiformes) en una playa fangosa de Chomes, Costa Rica
(1992)We recorded 27 species of Charadriiformes on the mud flats of Chomes, Golfo de Nicoya, Costa Rica, during biweekly censuses over one year. These were grouped taking into account their abundance and permanence on the flat. ... -
Abundancia, biomasa y floración de Thalassia testudinum (Hydrocharitaceae) en el Parque Nacional Cahuita, Caribe de Costa Rica
(2007)Tesis publicada en: Rev. Biol. Trop. (Int. J. Trop. Biol. ISSN-0034-7744) Vol. 56 (Suppl. 4): 175-189, December 2008. Entre agosto 2003 y agosto 2006 se estudiaron tres sitios representativos del Parque Nacional Cahuita ... -
La actividad proteolítica de los venenos de serpientes de Costa Rica sobre la caseína
(Revista de Biologia Tropical 31(1), 37-40, 1983)Se establecen las condiciones óptimas para la determinación comparativa de la actividad proteolítica de los venenos de serpientes costarricenses sobre la caseína y se describe dicha actividad para 13 venenos diferentes. ... -
Algunas características de las corrientes marinas en el Golfo de Nicoya, Costa Rica
(2016-10-13)The spatial and vertical structure of the water currents and its relationship with the tidal cycles were studied using current meters in the Gulf of Nicoya. In the upper gulf, the vertical marine current differences increase ... -
Algunas relaciones entre las zonas de surgencia del Pacífico Centroamericano y los Océanos Pacífico y Atlántico Tropical
(2001-02)Con el fin de explorar la influencia de los océanos tropicales sobre las Anomalías de la Temperatura Superficial del Mar (ATSM) de la costa pacífica centroamericana, se ajustó un modelo de función de transferencia a las ... -
Análisis de varios marcadores genéticos clásicos en la población de Costa Rica
(2001)A study of several loci blood groups (ABO, Diego, Duffy, Kell, Kidd, Lewis, Lutheran, MNSs, P, Rhesus and Secretor), and Hp serum protein was carried out on a sample of 2 196 unrelated Costa Rican individuals of both ... -
Análisis ultraestructural de membranas de glóbulos grasos lácteos de calostro y leche humana
(Revista de Biología Tropical 31(2):245-250, 1983)Lacteous fat globules with their membranes from human milk and calostrum were studied by scanning and transmission electron microscopy. The first appear as spheroidal structures with some irregularities on the surface. ... -
Aplicación del método de coagulación de plasma al estudio ultraestructural de especímenes biológicos
(1991)Biological particulate specimens, including Saccharomyces cerevisiae yeast, bovine spermatozoa and human blood cells (normal erythrocytes and leukemic cells) were processed for scanning and transmission electron microscopy ... -
Aquatic insect diversity of Costa Rica: state of knowledge
(2008)Costa Rica hosts an extraordinarily high biodiversity and is among the best studied neotropical countries. Insects represent the most diverse group of organisms, not only in terrestrial but also in aquatic, especially ... -
El arrecife coralino de Punta Cocles, costa Caribe de Costa Rica
(2004)This paper describes the Punta Cocles reef (Limón, Costa Rica). Data were obtained by sampling nine transects along the coast and observations done by skin diving between September and November of 2002.This reef consist ... -
Asociación del polimorfismo del codon 72 del gen P53 con el riesgo de cáncer gástrico en una población de alto riesgo de Costa Rica
(Revista de Biología Tropical 53 (3-4): 317-324, 2005, 2005-10-03)El cáncer gástrico es la segunda causa de muerte por cáncer en el mundo. Varios factores han sido asociados con el riesgo de llegar a desarrollarlo, entre ellos la predisposición genética. El gen p53 presenta un polimorfismo ... -
Aspectos ecológicos del cáncer gástrico en Costa Rica
(Revista de Biología Tropical 31(1) p.11-18, 1983-07-18)An analysis of 1315 cases of gastric cancer from the records of the Ministry of Public Health, San Jose, Costa Rica between 1977 and 1980 showed important geographical differences in the incidence, and especially in ... -
Atmospheric forcing of cool subsurface water events in Bahía Culebra, Gulf of Papagayo, Costa Rica
(Revista Biología Tropical, 60 (2): 173-186, 2012-04)Bahía Culebra, at Gulf of Papagayo on the north Pacific coast of Costa Rica, is an area of seasonal upwelling where more intense cooling events may occur during some boreal winter weeks mainly. To study these extreme cool ... -
Biología molecular del virus del rayado fino del maíz
(1986-06)A condensed report of research on the molecular biology of Maize Rayado Fino Virus is offered, along with a tentative model for the capsid structure that fits the biochemical analysis of this virus. Given the existence of ... -
Bosque y Población en la Península de Osa, Costa Rica
(Revista de Biología Tropical 50 (2):585-598, 2002, 2002-01)Este estudio relaciona datos geocodificados de censos de población con información de uso de la tierra proveniente de imágenes de satélite y fotografías aéreas. Se analizan tres procesos: deforestación, reforestación y ... -
Brachiopods, sipunculans, enteropneusts and metals from two estuarine tidal flats, Pacific, Costa Rica
(2016-09)Reports on the abundances and on metal concentrations in intertidal estuarine invertebrates from the Eastern Tropical Pacific are rare. Thus, the objectives of this report are to make accessible data on the abundances ... -
Cambios en el patrón electroforético del veneno de cascabela muda (Lachesis muta stenophrys) durante el almacenamiento bajo diferentes condiciones
(1985)Liquid and lyophilized samples of Lachesis muta venom were stored at different temperatures and for different periods of time, and analyzed by polyacrylamide gel electrophoresis (PAGE) and immunoelectrophoresis. Only slight ... -
Cambios post mortem en mucosa intestinal y tejido pulmonar de Mus musculus, observados al microscopio electrónico de barrido
(Revista de Biología Tropical 29(2) p.265-272, 1981)Post mortem ultrastructural alterations of surface epithelial tissues were studied by scanning electron microscopy. Ten male albino mice were sacrificed, and the duodenum, ileum arid lung excised and fixed immediately, ...