Artículos de revistas: Recent submissions
Now showing items 1201-1220 of 4968
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(2001)Cd0.5In0.33PS3, Fe0.5In0.33PS3, Mn0.5In0.33PS3, and compounds have been synthesized by ceramic method at 923 K. These compounds were characterized by powder X-ray diffraction (XRD), Fourier transform infrared (FTIR), ...
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(2001)A series of S-nitrosothiol compounds, structurally related to the NO-donor S-nitroso-N-acetyl-D,L-penicillamine (SNAP) that contain amidin groups were synthesised by S-nitrosation of the corresponding thiols and characterised. ...
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(Elsevier, 1999)NaCN is a classical stimulus used to elicit discharges from carotid body chemoreceptors. The effect is assumed to be mediated by glomus (type I) cells, which release an excitatory transmitter for the excitation of carotid ...
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(2001)Inorganic polyphosphate (polyP) is obtained by the polymerization of the terminal phosphate of ATP through the action of the enzyme polyphosphate kinase (PPK). Despite the presence of polyP in every living cell, a gene ...
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(2001)As well as being phytohormones, gibberellins (GAs) are present in some fungi and bacteria. Indeed, GAs were first discovered in the fungus Gibberella fujikuroi, from which gibberellic acid (GA3) and other GAs are produced ...
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(2001)At the Beni Biological Station, Bolivia, we compared the fate of seeds of the palm Attalea phalerata dispersed by tapirs to a lattine with that of non-dispetsed seeds. Survival of seeds that had passed through tapir guts ...
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(2001)Sex determination in mammals is controlled by the SRY gene located on the Y chromosome. It encodes a protein containing a DNA-binding and DNA-bending domain. In spite of recent advances in the identification of the mechanisms ...
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(Company of Biologists Ltd, 2001)In the early Xenopus embryo, the Xiro homeodomain proteins of the Iroquois (Iro) family control the expression of proneural genes and the size of the neural plate. We report that Xiro1 functions as a repressor that is ...
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(2001)We calculate thermodynamic properties of a disordered model insulator, starting from the ideal simple-cubic lattice (g = 0) and increasing the disorder parameter g to » 1/2. As in the earlier Einstein and Debye approximations, ...
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(2001)Beilschmiedia miersii is an endemic endangered tree of central Chile, protected only in La Campana National park. The regeneration of B. miersii is very low, presumably due to strong fruit and seedling predation by livestock. ...
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Asymptotic properties of solutions to nonautonomous Volterra difference systems with infinite delay (2001)We show that under certain conditions there is a one-to-one correspondence between weighted bounded solutions of a linear nonautonomous Volterra difference system with infinite delay and its perturbed system. Under additional ...
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(1999)We performed in situ experiments during the summer of 1995 and 1996 to assess the potential effect of solar ultraviolet B (UVB) radiation (290-320 nm) on the survival of Cyclops abyssorum tatricus Kozminski and Boeckella ...
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(2001)The effects of parasitisation by Aphidius ervi on the thermoregulatory behaviour of the pea aphid Acyrtosiphon pisum were studied in alfalfa fields and in an experimental thermal gradient. In the field, mummies were found ...
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(2001)1. Colonies of the aphid Rhopalosiphum maidis on Johnsongrass, Sorghum halepense, usually occur inside the whorl. The present work assessed the role of two biotic factors, plant quality and parasitism by Lysiphlebus ...
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(2001)Copper effects on human health represent a relevant issue in modern nutrition. One of the difficulties in assessing the early, acute effects of copper ingested via drinking water is that the taste of copper may influence ...
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(2001)Establishment success of plants derived from large seeds has been proposed to be greater than that of those derived from smaller ones, particularly under unfavourable conditions of moisture. Therefore, the advantages ...
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(2001)We studied plant-animal interactions and vegetation structure in two geographically close tropical Bolivian forests subjected to different hunting intensities. We hypothesized that reduction of mammals of > 1 kg in an ...
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(Academic Press, 2001)Berberidopsis corallina Hook. f. (Berberidopsidaceae) is a threatened vine, endemic to the temperate rainforests of southern Chile. A RAPD analysis was carried out to assess the extent of genetic variation in remaining ...
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(2001)We used experimental nests baited with California Quail (Callipepla californica) eggs or clay eggs to examine relative risks of nest predation in an agricultural landscape and in two large forest preserves in a south-temperate ...
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(2001)The purpose of this work was to investigate whether ethylene is involved in the oxidative and defensive responses of barley to the aphids Schizaphis graminum (biotype C) and Rhopalophum padi. The effect of aphid infestation ...