Listar Ciencias básicas por título
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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 ... -
Dilation of a non-quasifree dissipative evolution
(1981-03)A semigroup evolution for the 1/2-spin which admits a conservative dilation is known to be governed by a Bloch equation in a standard form. Here we construct a conservative dilation directly from the Bloch equation, thus ... -
Dinámica de Activación e Inactivación del Sistema de Dos Componentes BvrR/BvrS durante la Vida Intracelular de Brucella
(2021-11)Las bacterias del género Brucella son patógenos intracelulares de vertebrados con la capacidad facultativa de crecer extracelularmente. El establecimiento de la vida intracelular de Brucella involucra al menos cuatro ... -
Dinámica de aguas alrededor de la Isla del Coco, Costa Rica
(2016-11-17)Se analizan datos climatológicos superficiales y subsuperficiales usando parámetros físicos y químicos, nutrimentos y oxígeno disuelto sobre el Pacífico Tropical Este, algunos resultados de bases de datos, y otros de modelos ... -
Dinámica de las aguas en la parte interna del Golfo de Nicoya ante altas descargas del Río Tempisque
(1998-06-14)Se estudió la dinámica de las aguas de la parte interna del Golfo de Nicoya ante grandes descargas de los ríos. Valores de 0 ppm fueron encontrados al norte de la Isla Chira representando los valores mas bajos reportados ... -
Direct functionalization of Mn12-(methacrylate) clusters on Si(100): surface characterization and electrochemical properties
(2016-09)The reaction of H–terminated Si(100) with methacrylate–substituted manganese carboxylate clusters [Mn12O12{CH2C(CH3)COO}16(H2O)4], [Mn12–(methacrylate)] via hydrosilylation afforded Mn12–(methacrylate)−Si(100). The chemically ... -
Discovery of cahuitamycins as biofilm inhibitors derived from a convergent biosynthetic pathway
(2016-02-16)Pathogenic microorganisms often have the ability to attach to a surface, building a complex matrix where they colonize to form a biofilm. This cellular superstructure can display increased resistance to antibiotics and ... -
Discovery of nicoyamycin A, an inhibitor of uropathogenic Escherichia coli growth in low iron environments
(2017)High-throughput screening and activity-guided purification identified nicoyamycin A, a natural product comprised of an uncommon 3-methyl-1,4-dioxane ring incorporated into a desferrioxamine-like backbone via a spiroaminal ...