Browsing Ciencias básicas by Title
Now showing items 1397-1416 of 1562
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Tadpole begging reveals high quality
(2017)Parents can benefit from allocating limited resources non randomly among offspring, and offspring solicitation (i.e. begging) is often hypothesized to evolve because it contains information valuable to choosy parents. We ... -
Taxonomical and functional diversity of Saprolegniales in Anzali lagoon, Iran
(2020)Studies on the diversity, distribution and ecological role of Saprolegniales (Oomycota) in freshwater ecosystems are currently receiving attention due to a greater understanding of their role in carbon cycling in various ... -
Temperatura, Precipitación y Caudal en Panamá. Parte I: Características generales y distribución estacional
(1998-07)Valores medios mensuales de temperatura máxima y media, precipitación y caudal para diferentes estaciones son utilizadas para estudiar, las características generales y la distribución estacional de esos parámetros en la ... -
Temperatura, Precipitación y Caudal en Panamá. Parte II: ENOS y Cambio climático
(1998-07)En este trabajo se analizaron series de valores medios mensuales de temperatura máxima y media, de precipitación y caudal para diferentes estaciones en la República de Panamá en relación con El Niño-Oscilación del Sur ... -
El temporal de enero 2000: sus características e impactos socio-económicos sobre las comunidades próximas a la cuenca de la Laguna de Arenal y de la región Huetar Norte
(2009)Los fenómenos y procesos climáticos forman parte integral del sistema climático terrestre y son estudiados en consecuencia, pero también adquieren relevancia en tanto son detonantes de desastres, en algunos casos de ... -
Temporal variations in fumarole gas chemistry at Poás volcano, Costa Rica
(2015-03)We report the chemical and isotopic composition of fumarole gas discharges collected at Poás Volcano, Costa Rica from 2001 to 2014, covering a period during which the volcano experienced a series of phreatic eruptions ... -
Tendencias hacia condiciones hidrológicas más secas en Centroamérica (1982- 2005)
(2013-11-11)Se presenta un resumen de los resultados de proyecciones hidrológicas de 30 modelos de circulación general (MCG) a final de siglo y se analizan si varios parámetros hidrometeorológicos presentan tendencias (1982-2005) ... -
Teoría de grupos en cuantización
(Centro de Investigación y de Estudios Avanzados del IPN, México, DF, 1992, 1992-02-15)Esta monografía es un curso doctoral impartido en el CInvEstAv del Instituto Politécnico Nacional en México, DF, durante el año académico 1991-92 (con licencia sabática de la UCR) y luego redactado como publicación ... -
El terremoto de Sámara (Costa Rica) del 5 de setiembre del 2012 (Mw 7,6)
(2013)El 5 de setiembre del 2012 se produjo un terremoto (Mw 7,6) en la región de la península de Nicoya. A partir de dos métodos que usan modelos de velocidades en 1D y 3D presentamos tres soluciones para el inicio de la ruptura ... -
Tetraaquabis(2,3-dihydro-1,4-benzodioxine-2-carboxylato)calcium(II)
(2020)The acid–base reaction of 1,4-benzodioxane 2-carboxylic acid with calcium carbonate furnished the centrosymmetric title compound, [Ca(C9H7O4)2(H2O)4], in which the metal ion is octahedrally coordinated by two monodentate ... -
The 1877-1878 Mega Niño and its social impact in Costa Rica, Central America
(2018-10)This work analyzes the social impact of the 1877-1878 Mega-Niño event in Costa Rica, through the comparison of data about droughts, rains, locust plagues and epidemics, collected from documentary sources and the analysis ... -
The 2:3:6 quasi-periodic oscillation structure in GRS 1915+105 and cubic subharmonics in the context of relativistic discoseismology
(Monthly Notices of the Royal Astronomical Society 440:3011-3015, 2014-06-01)We propose a simple toy model to explain the 2:3:6 quasi-periodic oscillation (QPO) structure in GRS 1915+105 and, more generally, the 2:3 QPO structure in XTE J1550−564, GRO J1655−40 and H1743−322. The model exploits the ... -
The asymptotic distribution of Andrews’ smallest parts function
(2015-12)In this paper, we use methods from the spectral theory of automorphic forms to give an asymptotic formula with a power saving error term for Andrews’ smallest parts function spt(n). We use this formula to deduce an asymptotic ... -
The Bacterial Product Violacein Exerts an Immunostimulatory Effect Via TLR8
(2019)Violacein, an indole-derived, purple-colored natural pigment isolated from Chromobacterium violaceum has shown multiple biological activities. In this work, we studied the effect of violacein in different immune cell lines, ... -
The Caribbean Low-Level Jet, the Inter-Tropical Convergence Zone and Precipitation Patterns in the Intra-Americas Sea: A Proposed Dynamical Mechanism
(2015-01-12)Data from the Global Precipitation Climatology Project covering Central America, the Caribbean Sea, the eastern tropical Pacific and northern South America are used to compute four indexes that describe characteristics ... -
The Central American Dry Corridor: A Consensus Statement and its Background
(2019)A unique gathering of climate, development and environmental experts took place from September 25-28, 2017 in San José and Guanacaste Province, Costa Rica. The subject of their deliberations was the Central American Dry ... -
The Chowla-Selberg formula for abelian CM fields and Faltings heights
(2016-03)In this paper we establish a Chowla-Selberg formula for abelian CM fields. This is an identity which relates values of a Hilbert modular function at CM points to values of Euler’s gamma function Γ and an analogous function ... -
The clerodane diterpene casearin J induces apoptosis of T-ALL cells through SERCA inhibition, oxidative stress, and interference with Notch1 signaling
(2016-01-28)T-cell acute lymphoblastic leukemia (T-ALL) is an aggressive hematologic malignancy that preferentially affects children and adolescents. Over 50% of human T-ALLs possess activating mutations of Notch1. The clerodane ...