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Leaf spectra and weight of species in canopy, sub-canopy, and understory layers in a Venezuelan Andean cloud forest
(Scientifica, Article ID 839584, 14 pages http://dx.doi.org/10.6064/2012/839584, 2012-04-22)
We characterize the leaf spectra of tree species of an Andean cloud forest in Venezuela, grouped according to position in canopy, subcanopy and understory. We measured leaf reflectance and transmittance spectra in the ...
Freezing avoidance in tropical Andean bamboos
(LXth World bamboo Congress proceedings. Sección 2, Massachusetts, USA. pp. 247-257, 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. ...
Assessing and modeling the role of the native legume Lupinus meridanus in fertility restoration in a heterogeneous mountain environment of the tropical Andes
(Agriculture, Ecosystems and Environment 159 (2012) 29-39, 2012)
The role of the native legume Lupinus meridanus on fertility restoration in long fallow agriculture of the Venezuelan Andes was analyzed using field and laboratory data and a process-based model of succession (FAPROM). L. ...
Hidrogenación de Aromáticos en la Catálisis del Complejo Ru(η5- C5H5)(Cl)(TPPDS)2 en Medio Bifásico Orgánico/Agua
(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 ...
Aqueous biphasic olefin hydroformylation catalyzed by water-soluble rhodium complexes
(2011-08-17)
Catalysis with water-soluble rhodium complexes, RhCl(CO)(TPPMS)2, [TPPMS = P(C6H5)2(C6H4SO3)] (1),
RhCl(CO)(TPPDS)2, [TPPDS = P(C6H5)(C6H4SO3)2] (2) and RhCl(CO)(TPPTS)2, [TPPTS = P(C6H4SO3)3] (3)
in hydroformylation of ...
Hydrogenation of aromatics with [Ru(g5-C5H5)Cl(TPPDS)2] in biphasic medium
(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 ...
Biphasic catalysis with RuCl2(DMSO)(TPPMS)3
(2011-08-16)
A mononuclear RuCl2(DMSO)(TPPMS)3 complex (1) (TPPMS ¼ triphenylphosphine monosulfonate) has been
synthesized. Spectroscopic analysis by i.r., u.v.–vis., 1H-, 13C-, 31P-n.m.r., cyclic voltammetry, m.s. analysis and ...
Avian nectar robbers of Passiflora mixta (Pasifloraceae): Do they have a positive effect on the plant?
(Interciencia 36(8): 587-592, 2011-08-05)
The effect of nectar robbing on plant reproduction may be negative, positive or neutral. The effect was evaluated on Passiflora mixta, an Andean high-mountain species that is pollinated
by the Sword-billed Hummingbird ...