Browsing Ciencias básicas by Title
Now showing items 182-201 of 1562
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Balance hídrico de la cima de los volcanes Irazú y Turrialba y su afectación a la actividad hidrotermal superficial
(2016)Los sectores de análisis, correspondientes a las cimas de los volcanes Turrialba e Irazú presentan áreas y elevaciones máximas respectivamente de 672507,6 m2 y 3340 m s.n.m y 1066650,43 m2 y 3432 m s.n.m. Su origen se ... -
Balanced dynamics of deep and shallow Hadley circulations in the tropics
(Journal of Advances in Modeling Earth Systems 6(3): 777-804, 2014-05-06)This paper examines the dynamics of large-scale overturning circulations in the tropical atmosphere using an idealized zonally symmetric model on the equatorial b-plane. Under certain simplifications of its coefficients, ... -
Banco de germoplasma de Pejibaye.
(2012-04-09)Dilucidar el comportamiento de la planta de Pejibaye respecto a macollamiento y resistencia a la bacteriosis. -
beach.fauna.cvs
(2017)Methodology: The data are 29 sediment samples and these were collected (September 2006) each 200m in a parallel transect on the low spring tide level in a sandy beach of the Caribbean coast of Costa Rica. The data are ... -
Begomovirus de importancia económica que pueden encontrarse en ambientes protegidos
(2015)Los begomovirus (familia Geminiviridae) son un grupo de virus de plantas transmitidos por la mosca blanca Bemisia tabaci (o ‘palomilla’). Las enfermedades causadas por estos patógenos se han propagado a nivel mundial, ... -
Bemisia tabaci Biotype Q is present in Costa Rica
(2011)Whiteflies are an insect group that comprises multiple species and biotypes, capable of affecting crops by phloem feeding, virus transmission and promotion of fungal colonization. The distribution of these pests is worldwide. ... -
Bile salts and derivatives: Rigid unconventional amphiphiles as dispersants, carriers and superstructure building blocks
(2015)Steroidal surfactants like bile salts have a rigid amphiphilic structure significantly different from the typical head–tail one. As a result, these molecules show peculiar features in their self-assembly behavior and ... -
Bioassay-guided isolation of anti-inflammatory O-sulfated withanolides from Acnistus arborescens (Solanaceae)
(2019)Bioassay-guided fractionation of Acnistus arborescens (Solanaceae) organic extract afforded two anti-inflammatory withanolides: 2,3-Dihydro-3β-O-sulfate withacnistin (1) and 2,3-Dihydro-3β-O-sulfate withaferin A (2) showing ... -
Biodegradation of Polybrominated Diphenyl Ethersin Liquid Media and Sewage Sludge by Trametes versicolor
(2015)Polybrominated diphenyl ethers (PBDE) are widely employed as flame retardants and constitute a group of emerging pollutants of high persistence. The degradation of different PBDE commercial mixtures (penta-, octa- and ... -
Biodiversity and density of subtidal benthos of an oceanic tropical island (a comparison within the Pacific Ocean)
(2016)The marine macrofauna of the shallow sandy bottom of Isla del Coco, Costa Rica (5°32′N-87°04′W) was assessed in April 2010. Comparisons of richness, density and diversity between levels of exposure to ocean influence were ... -
Biogeographical assessment of myxomycete assemblages from Neotropical and Asian Palaeotropical forests
(2017-03-16)Aim Lowland/highland and Neotropical/Asian Palaeotropical assemblages of myxomycetes were compared to test the null hypothesis that neither species diversity nor species composition differs between the two ecoregions. ... -
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 ... -
Biosensor for Aluminum(III) Based on α-Chymotrypsin Inhibition using a Disposable Screen-Printed Carbon Electrode and Acetyl-Tyrosine Ethyl Ester as Substrate
(2015)We report on a new amperometric assay for Al(III) ions based on the inhibition of α-chymotrypsin enzyme. The immobilization of the enzyme was performed on screen-printed carbon electrodes modified with gold nanoparticles ... -
Birds in Coastal and Marine Environments
(Springer Science & Business Media, 2009)In Costa Rican coastal and marine environments (e.g., estuaries, mud- flats, islands, open ocean) 96 bird species have been recorded, 11% of the total avifauna in the country. This high diversity is primarily explained by ... -
Bis(μ2-benzoato-κ2O,O′)bis(benzoato-κO)bis(ethanol-κO)bis(μ3-hydroxido)hexakis(μ-pyrazolato-κ2N,N′)hexacopper(II) ethanol disolvate
(2019)Trinuclear copper–pyrazolate entities are present in various Cu-based enzymes and nanojar supramolecular arrangements. The reaction of copper(II) chloride with pyrazole (pzH) and sodium benzoate (benzNa) assisted by ... -
Blaming it on the Weather: The Role of “Inclement” Rainfall in Society- Nature Relations in Liberal Costa Rica (1860-1940)
(2011)This article seeks to shed light on some of the many possible interactions between changes in rainfall regime, one of the climatic factors with the greatest bearing on the history of human society, and the economic and ... -
Body distribution of Bothrops asper (terciopelo) snake venom myotoxin and its relationship to pathological changes
(1988)The distribution of 125I-labelled Bothrops asper myotoxin following i.m. and i.v. injections was studied in mice. After i.m. administration the toxin was concentrated in the injected gastrocnemius muscle, with relatively ...