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Mostrando ítems 111-120 de 133
Efecto de extractos de artrópodos sobre la multiplicación del Toxoplasma gondii dentro de macrófagos peritoneales de ratón
(Rev. Biol. Trop. 51(2): 317-320, 2003, 2003)
Treatment of toxoplasmosis usually causes secondary effects. It is important to find active substances extracted from natural organisms. In this work we studied some arthropod extracts that have effect against Toxoplasma ...
Polychaetes associated with decaying wood in Térraba mangrove, South Pacific, Costa Rica
Poliquetos asociados a madera en descomposición en el manglar de Térraba, Pacífico Sur, Costa Rica
(2015)
The present study shows spatial patterns in the faunal assemblage of decaying wood and sediments, with emphasis on the polychaetes. The survey was executed across a salinity gradient in a tropical mangrove estuary of Costa ...
Relevance of the plasminogen activation system in the pathogenesis and progression of gastric cancer
(2018-03)
Gastric cancer is ranked as the third death-causing cancer and one of the most incident malignancies worldwide. Although Helicobacter pylori is the most well-established risk factor for the development of this neoplasm, ...
Caracterización anatómica ultraestructural de las variantes “Atlántica”, “Sur” y “Cebolla” del bambú, Guadua angustifolia (Poaceae: Bambusoideae), en Costa Rica
(2006-08-20)
We present an ultrastructural characterization of three variants or “forms” of Guadua angustifolia
and of the closely related Guadua sp., from Costa Rican populations. Their ultrastructure is similar. Differences are: ...
Observaciones sobre la larva del cangrejo marino tropical (Decapoda: Porcellanidae) Petrolisthes armatus en el Golfo de Nicoya, Costa Rica
Observations on the larvae of the tropical marine crab Petrolisthes armatus in the Gulf of Nicoya, Costa Rica
(2008-09)
Durante octubre y noviembre de 1998 (estación lluviosa) y diciembre, febrero y marzo de 1999 (estación seca) se muestreó la distribución de la larva de Petrolisthes spp, así como la densidad del total de las larvas de ...
Aberraciones cromosómicas en trabajadoras expuestas a plaguicidas
Chromosomic aberrations in female workers exposed to pesticides
(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 ...
Micronúcleos y otras anormalidades nucleares en el epitelio oral de mujeres expuestas ocupacionalmente a plaguicidas
Micronuclei and other nuclear abnormalities in the oral epithelium of female workers exposed to pesticides
(Revista de Biología Tropical 52(3) p. 611 -621, 2004-12-15)
In order to study if banana fields labour exposure to pesticides produces some kind of DNA damage,
we determine the presence of micronuclei in epithelial oral cells in working women in Guapiles and
Siquirres, Costa Rica, ...
One year weekly dynamics of limnological conditions and phytoplankton in Lake Bonilla, Costa Rica
(2016)
The detailed response of tropical lake phytoplankton to weather variations has been little studied, but it seems that composition varies in response to rain and wind variability over the course of the year. In order to ...
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 ...
Chromosomal defects in 34 male homosexuals, half of them with HIV antibodies
(Revista de Biologíaa Tropical 50(1):347-353, 2002, 2002-09)
Most of the research about viral interactions with human chromosomes was done during the sixties
and early seventies and very few was performed after the human immunodeficiency virus (HIV) appearance as
an epidemic in ...