Browsing Ciencias básicas by Title
Now showing items 841-860 of 3130
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Determination of the process variables for adsorption and desorption of phosphate from wastewater by selective ion exchangers on magnetic particles
(2015-08-04)In this study different process variables were evaluated for the adsorption and desorption of phosphate from wastewater by using selective ion exchangers with magnetic particles modi-fied with layered double hydroxides ... -
Detritus camouflage in webs of Helvibis longicauda (Araneae: Theridiidae)
(2007)Adult females of Helvibis longicauda accumulated tiny pieces of vegetation in the mesh of their webs. The amount of debris accumulated was much greater in webs of spiders with either egg sacs, spiderlings or juveniles than ... -
Development of an extraction method for the determination of inorganic anions (chloride, sulfate and phosphate) in edible oils from different origins by ion chromatography
(2018)The present work reports the development of ion chromatography conductivity based detection analytical method for the determination of some inorganic anions (chloride, sulfate and phosphate) in vegetable oils. The analytes ... -
Developmental morphology of granular skin glands in pre-metamorphic egg-eating poison frogs
(2017)Parents in many taxa, including insects, mol- luscs, fish, snakes, and amphibians provision chemical defences, such as peptides, steroids, or alkaloids to their offspring to reduce the risk of predation. In most cases, ... -
Diagnóstico de contaminación de agua en la Quebrada Camaronera, Parque Nacional Manuel Antonio, Área de Conservación Pacífico Central, MINAE, Costa Rica
(2009-11-01)"La quebrada Camaronera en Manuel Antonio se considera un objeto de conservación y un valor natural para el Parque Nacional Manuel Antonio, encentrándose actualmente con un alto grado de amenaza. El objetivo de este estudio ... -
Diagnóstico de las ciencias de la tierra y del espacio en Costa Rica
(2006)En este informe se resumen los aspectos generales del desarrollo de las ciencias de la tierra y del espacio en Costa Rica. Para aspectos más específicos se recomienda revisar los artículos de Montero (2000) y Soto et al. ... -
El diagnóstico en psiquiatría: una discusión teórica y práctica para el abordaje clínico
(2017)El artículo aborda las dificultades en el diagnóstico psiquiátrico por las características propias de estos trastornos que, junto con la definición de lo patológico desde la prescripción de lo moralmente aceptado y los ... -
Diccionario histórico-toponímico de la Isla del Coco, Costa Rica
(2012-09)Many names have been used for the different places of Isla del Coco, and some have changed over time. Studying different historic sources, seventy-six names of the main topographic features were collected for Isla del Coco ... -
Diet and Leukocyte Telomere Length in a Population with Extended Longevity: The Costa Rican Longevity and Healthy Aging Study (CRELES)
(2021)Elderly Costa Ricans have lower mortality rates compared to their counterparts from developed countries. Reasons for this survival advantage are not completely known. In the present study, we aimed to identify dietary ... -
Differences in escape behavior between a cryptic and an aposematic litter frog
(2011)Clay models have been used to investigate the relative antipredator effectiveness of cryptic and of aposematic coloration in litter frogs, but such studies do not account for possible differences in prey escape behavior. ... -
Differences in plasmatic butyrylcholinesterases (BChE) values between Pacific and Caribbean populations of terciopelo (Bothrops asper) in Costa Rica
(2019)The terciopelo (Bothrops asper) inhabits human-modified environments such as agricultural areas, becoming more prone to be exposed to organophosphate insecticides. These chemicals can inhibit plasmatic butyrylcholinesterases ... -
Differences in web features between two sympatric Leucauge species (Araneae: Tetragnathidae) suggest a trade-off in prey capture strategy
(2021)The design of orb webs is affected by multiple abiotic (e.g., wind, available space), biotic (e.g., prey availability, predation), and species specific (e.g., spider size) factors. Thus, some features of each spider web ... -
Different Messages are Transmitted by Individual Duet Contributions and Complete Duets in a Species with Highly Overlapped Duets
(2018)Background: Duet function hypotheses have been mostly studied in bird species that produce duets with male and female solo songs. However, in order to understand if patterns of duet function are similar across all duetting ... -
Differential volatile organic compound expression in the interaction of Daldinia eschscholtzii and Mycena citricolor
(2023)Fungi exhibit a wide range of ecological guilds, but those that live within the inner tissues of plants (a.k.a. endophytes) are particularly relevant due to the benefits they sometimes provide to their hosts, such as ... -
Differentiation in reproductive traits of geminatemangrove crabs of the genus Aratus (Decapoda: Brachyura)across the Central American Isthmus
(2016)The mangrove crab Aratus pisonii was considered to have an amphi-American distribution; however, a recent study revealed that the Eastern Tropical Pacific populations were genetically distinct, thus representing a new ... -
Diketopiperazines from Costa Rican endolichenic fungus Colpoma sp. CR1465A
(2016-05-15)Three new diketopiperazines (1–3), cyclo(l-Pro-d-trans-Hyp) (1), cyclo(l-Pro-d-Glu) (2), and cyclo(d-Pro-d-Glu) (3) and five known diketopiperazines (4–8) were isolated from the endolichenic fungus Colpoma sp. CR1465A ...