Listar Articulos, Pre-prints (Facultad de Ciencias) por título
Mostrando ítems 161-180 de 488
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Facilitation and edge effects influence vegetation regeneration in old-fields at the tropical Andean forest line
(Alemania, 2015)Questions: Do local plant-plant interactions and facilitation play an important role in vegetation dynamics after disturbance in the high tropical Andes? In particular, does the dominant shrub Baccharis prunifolia have an ... -
Factores que afectan la dosis en mamografía
(2011-10-11)La Mamografía es un método de diagnóstico radiológico de la mama útil en mujeres mayores de 30 años, ampliamente difundido y probado en el mundo, simple de realizar. La importancia de esta técnica radica en que es capaz ... -
Factors controlling decomposition of soil organic matter in fallow systems of the high tropical Andes: A field simulation approach using 14C- and 15N- labelled plant material
(2006)N-rich (C:N ¼ 27) and N-poor (C:N ¼ 130) wheat straw, labelled with 14C and 15N, was incubated for 2 yr in two major ecosystems of the upper elevation belt of cultivation in the high Andes: the moist Paramo (precipitation ... -
Fermion localization on thick branes
(SABER ULA, 2007-03-19)Fermion localization on thick branes. (Melfo, Alejandra; Pantoja, Nelson and Tempo, José David) Abstract We consider chiral fermion confinement in scalar thick branes, which are known to localize gravity, coupled ... -
Fire as a factor influencing the diversity of life forms in neotropical savannas
(SABER ULA, 2005-01-25)Artículo publicado en:Pereira, R.C., Nasser L.C.B. (eds). 1996. Biodiversity and Sustainable Production of Food and Fibers in the Tropical Savannas, EMBRAPA, Brazil, pp. 6-9. -
Fire in neotripical savannas
(Encyclopedia of life support systems (EOLSS), developed under the auspices of the UNESCO, EOLSS publishers, Oxford ,UK, [http://www.eolss.net], Reino Unido, 2007)This chapter reviews the main characteristics of tropical savannas and their interactions with fire, a main factor involved in the dynamics of these ecosystems. Burning in savannas generally takes place by the end of the ... -
First European interlaboratory study of the analysis of benzoxazinone.
(SABER ULA, 2008-07-02)First European interlaboratory study of the analysis of benzoxazinone derivatives in plants by liquid chromatography (Eljarrat, E.; Guillamón, M.; Seuma, J.; Mogensen, B. B.; Fomsgaard, I. S.; Oliveros Bastidas, Alberto; ... -
La flora de los páramos
(1981) -
Floristic, structural and physiognomic recovery of tropical dry forest in La Jarreta, Península de Guanahacabibes
(Revista Anales de la Academia de Ciencias de Cuba 4(1):1-17., Cuba, 2014) -
Flowering and fruit production dynamics of sweet pepper (Capsicum chinense Jacq) under different shade conditions in a humid tropical region
(2006)Growing sweet pepper (C. chinense) under shade has increased in the region south of Lake Maracaibo in Venezuela. We studied the effects of different shade conditions on the dynamics of flowering and fruit production of C. ... -
Formation of vortices in first order phase transitions
(SABER ULA, 2003-12-05)Formation of vortices in first order phase transitions (Melfo, Alejandra; Perivolaropoulos, Leandros) Abstract Using a toy model Lagrangian we investigate the formation of vortices in first order phase transitions. ... -
Freezing avoidance in tropical Andean bamboos
(The Journal of the American Bamboo Society 27:1-10., 2014)Frost resistance was compared in five species of different life forms in the neotropical woody bamboo genus Chusquea growing along a cloud forest-paramo gradient, between 2250-4010 m a.s.l. in the Venezuelan Andes. C. ... -
Freezing avoidance in tropical Andean bamboos
(LXth World bamboo Congress proceedings. Sección 2, Massachusetts, USA. pp. 247-257, Estados Unidos, 2012-04-15)Frost resistance was compared in five species of different life forms in the neotropical woody bamboo genus Chusquea growing along a cloud forest-paramo gradient, between 2250-4010 m a.s.l. in the Venezuelan Andes. C. ... -
Freezing tolerance in grasses along an altitudinal gradient in the Venezuelan Andes
(SABER ULA, 2006-12-07)Freezing tolerance in grasses along an altitudinal gradient in the Venezuelan Andes (Márquez, Edjuly J., Rada, Fermín y Fariñas, Mario) Abstract The tropical high Andes experience greater daily temperature oscillations ... -
El fuego y los árboles de las sabanas
(Medina E, Huber O, Nassar JM & Navarro (Eds). Recorriendo el paisaje vegetal de Venezuela. Ediciones IVIC., 2013) -
Functional characterisitcs of the arborescent genus Polylepis along a latitudinal gradient in the high Andes
(Interciencia 32(10): 663-668, Venezuela, 2007-09)Polylepis is a genus restricted to the Andean Mountain Range, naturally occurring above the upper continuous forest limit. The purpose of this work was to integrate and compare functional characteristics in terms of water ...