Listar Articulos, Pre-prints (Facultad de Ciencias) por título
Mostrando ítems 184-203 de 488
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Gas exchange, growth, flowering and furit production in sweet pepper (Capsicum chinenseJacq) along a thermal gradient determined by altitudinal differences in a tropical region
(Experimental Agriculture 15: doi:10.1017/S0014479715000071., Inglaterra, 2016-04)A common practice in some South American countries consists in moving around Capsicum chinense cultivars between regions where edaphoclimatic conditions differ notably. The purpose of this research was to compare and relate ... -
Gauge invariance for the massive axion
(SABER ULA, 2003-12-05)Gauge invariance for the massive axion (Khoudeir, Adel; Arias, Pío José) Abstract A massive gauge invariant formulation for scalar Φ and antisymmetric (Cmnp) fields with a topological coupling, which provides a ... -
Gauge theories at finite temperature and the background field method
(SABER ULA, 2006-01-19)Gauge theories at finite temperature and the background field method Antikainen, J.; Chaichian, M.; Pantoja, N.R.; Salazar, J.J. Abstract The background field method has been employed to ... -
Generalised soliton solutions of the Weyl class
(SABER ULA, 2008-07-02)Generalised soliton solutions of the Weyl class (Verdaguer, Enric ; Carot, Jaume) Abstract The whole family of generalised soliton solutions of the Weyl class for Einstein's equations in vacuum is considered. A ... -
Genetic typing of Trypanosoma cruzi isolates from different hosts and geographical areas of western Venezuela
(2011-12-13)A total of 72 Trypanosoma cruzi isolates from different hosts and geographical regions of western Venezuela, where Chagas disease is endemic, were typed using ribosomal and mini-exon gene markers. The isolates were obtained ... -
La geometría del universo y la radiación cósmica de fondo
(SABER ULA, 2004-06-16)La geometría del universo y la radiación cósmica de fondo (Rago, Héctor) Resumen La Radiación Cósmica de Microondas que plena uniformemente el espacio, es un vestigio de una época cuando el universo era unas mil ... -
Giant cowbird (Molothrus orizivora) as broodparasite of the green jay (Cyanocorax yncas) in the Venezuelan Andes
(Ornitología Neotropical 20: 305-309, Venezuela, 2009) -
Global change effects on the vegetation of tropical high mountains and savannas
(Tiessen, H., Brklacich, M., Breulmann, G. and Menezes, R. (Eds). Communicating global change science to society. An assessment and case studies. SCOPE 68. Island Press, Washington, pp. 165-169, Estados Unidos, 2007) -
Grazing impact on vegetation structure and plant species richness in an old-field succession of the venezuelan Páramos
(Spehn, E., Liberman, M., Körner, C. (Eds)., Estados Unidos, 2006) -
GridChoque: a grid environment to experiment on spherically symmetric general relativistic radiation hydrodynamics
(2009-10-20)This paper presents a Grid application, GridChoque: a distributed, and a grid based, environment devised to explore the general relativistic spherically radiative stellar collapse using several tools of calculus and ... -
Heterogeneidad del paisaje de selva semicaducifolia montana en tres cuencas de Los Andes venezolanos
(SABER ULA, Venezuela, 2011-12)Se realizó un análisis comparativo de la heterogeneidad del paisaje de selva semicaducifolia montana en tres cuencas con diferente grado y tipo de intervención. Se elaboraron mapas de cobertura de la vegetación natural e ... -
Hidrogenación de Aromáticos en la Catálisis del Complejo Ru(η5- C5H5)(Cl)(TPPDS)2 en Medio Bifásico Orgánico/Agua
(Venezuela, 2011-08-17)En este trabajo se presentan los resultados de la hidrogenación de compuestos aromáticos como el tolueno, benceno y m-xileno en un sistema bifásico heptano/agua, utilizando como precursor catalítico el complejo ... -
Historias de amor, de tragedias y terremotos.
(SABER ULA, 2007-06-04) -
Homothetic perfect fluid spacetimes
(SABER ULA, 2008-07-02)Homothetic perfect fluid spacetimes (Carot, Jaume; Sintes, A. M.) Abstract A brief summary of results on homotheties in general relativity is given, including general information about spacetimes admitting an ... -
How do two Lupinus species respond to temperature along an altitudinal gradient in the Venezuelan Andes?
(Revista Chilena de Historia Natural 81: 335-343, Chile, 2008)Temperature determines plant formations and species distribution along altitudinal gradients. Plants in the tropical high Andes, through different physiological and morphological characteristics, respond to freezing night ... -
Hydrodynamics in class b warped spacetimes.
(SABER ULA, 2006-01-26)Hydrodynamics in class b warped spacetimes. (Núñez, Luis; Carot, Jeumes.) Abstract We discuss certain general features of type B warped spacetimes which have important consequences on the material content they may ... -
Hydroformylation reactions of the trans-Mo(CO)4(p-C5NH4SO3NA)2 complex in biphasic medium
(Akadémiai Kiadó, Budapest and Springer, Dordrecht, 2008-10-12)Trans-bis(sodium pyridine-p-sulphonate)tetracarbonylmolybdenum(0) complex, (trans-Mo(CO)4(p-PySO3Na)2, (1)) was used as a catalytic precursor for the 1- hexene hydroformylation reaction, in biphasic toluene/water medium ... -
Hydrogen cyanide release during feeding of generalist and specialist lepidopteran larvae on a cyanogenic plant, Passiflora capsularis.
(SABER ULA, 2007-04-09)Hydrogen cyanide release during feeding of generalist and specialist lepidopteran larvae on a cyanogenic plant, Passiflora capsularis. (Alonso Amelot, Miguel; Avila Nuñez, Jorge Luis; Duarte, Lisday y Oliveros Bastidas, ... -
Hydrogenation of aromatics with [Ru(g5-C5H5)Cl(TPPDS)2] in biphasic medium
(Venezuela, 2011-08-16)[Ru(g5-C5H5)Cl(TPPDS)2], [TPPDS=P(C6H5)(C6H4SO3 ))2] in biphasic (n-heptane/water) medium hydrogenates toluene, benzene and m-xylene (105 C, 1400 psig H2, substrate/catalyst=600:1, 4 h) and in toluene hydrogenation gives ...