Repositorio Académico de la Universidad de Chile: Recent submissions
Now showing items 44141-44160 of 98648
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(2001)The effect of alternative host condition on the pattern of specialisation of the aphid Rhopalosiphum maidis (Fitch) was studied. R. maidis commonly occurs in Chile on Johnson grass (Sorghum halepense L.) but rarely on ...
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(2001)Calreticulin, a molecular chaperone involved in the folding of endoplasmic reticulum synthesized proteins, is also a shock protein induced by heat, food deprivation, and chemical stress. Mobilferrin, a cytosolic isoform ...
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(2001)Peroxidase enzymes have been found in soluble, ionically bound, and covalently bound forms and have been implicated in several physiological processes in plants. This paper investigates the effect of aphid infestation ...
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(Academic Press Inc., 2001)A crystallographic and thermal study of the system CuxM1-x(HCOO)2·2H2O (M:Mn, x=0.47; Co, x=0.35; Ni, x=0.37; Cd, x=0.47) has been performed. The compounds, grown at room temperature, crystallize in space group P2I/c and ...
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(2000)We use the discrete nonlinear Schrödinger (DNLS) equation to show that nonlinear tight-binding lattices of different geometries and dimensionalities display a universal self-trapping behavior. First, we consider the problem ...
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(2001)An important disturbance of anthropogenic origin frequently occurring in freshwater ecosystems is a rise in the concentration of heavy metals in solution, among which copper stands out due to its known toxicity. However, ...
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(2001)A bacterial contact assay is described which uses a chemoautotrophic microorganism, Nitrosomonas communis (strain Nm2) to evaluate the biological effect of contaminated soils. The effects of two toxicants on the ammonium ...
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(2000)A spirostanic saponin was isolated from the ethanolic extract of the aerial parts of Solanum laxum Steud. The compound, named luciamin, was characterised by NMR spectroscopy, mass spectrometry and chemical methods, as (22R, ...
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(Elsevier, 2000)We present a theoretical conformational study of neutral and N- protonated form of dopamine in which we relate its pharmacological activity to the chemical hardness. We have found that the neutral form presents small ...
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(2001)A set of different protein kinases have been involved in tau phosphorylations, including glycogen synthase kinase 3b (GSK3b), MARK kinase, MAP kinase, the cyclin-dependent kinase 5 (Cdk5) system and others. The latter ...
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(2001)Effects of cytisine (cy), 3-bromocytisine (3-Br-cy), 5-bromocytisine (5-Br-cy) and 3,5-dibromocytisine (3,5-diBr-cy) on human (h) α7-, α4β2- and α4β4 nicotinic acetylcholine (nACh) receptors, expressed in Xenopus oocytes ...
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(2000)Nitric oxide (NO) activates a K+ current in dissociated amphibian olfactory receptor neurons. Using the patch-clamp technique in its whole-cell mode and stimulation with puffs of the NO-donor sodium nitroprusside, we further ...
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(1999)There is evidence that severe malnutrition started during gestation and continued through lactation affects adversely the morphologic development of the neocortex leading to increased neuronal cell packing density and ...
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(Academic Press Inc., 2000)The markers Xslug, Xsnail, and Xtwist all are expressed in the presumptive neural folds and are thought to delineate the presumptive neural crest. However, their interrelationship and relative spatiotemporal distributions ...
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(2000)The phosphorylation of microtubule-associated proteins (MAPs) is thought to be a key factor in the regulation of microtubule (MT) stability. Previously we isolated DMAP-85, a Drosophila MAP shown to be associated with ...
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(Kluwer Academic/Plenum Publishers, 1999)Experimental tests were conducted to determine whether females and males of the tree-dwelling lizard Liolaemus tenuis (Tropiduridae) show intraspecific chemical recognition during breeding and postreproductive seasons. ...
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(Society for Neuroscience, 2000)Using a newly developed dissociation procedure, we isolated the specialized rhabdomeral membranes from Drosophila retinal photoreceptors. From these membranes, we have recorded spontaneous active currents in excised patch, ...
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(American Chemical Society, 2000)The surface-enhanced Raman scattering (SERS) spectra for phthalimide (PIMH) vacuum evaporated, cast onto silver island films, and from colloidal silver are clearly identified with the formation of a phthalimide-silver ...
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Electronic structure and bonding of the ground state of alkaline-earth-metal monoxides and carbides (American Chemical Society, 2000)The electronic structure of the ground state of monoxides MO and carbides MC2 with M an alkaline-earthmetal atom (Be to Ba) has been investigated. Bond energies, vibrational frequencies, dipole moments and equilibrium bond ...
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(Marcel Dekker Inc., 2000)By means of 13C-NMR spectroscopy and AM1 molecular orbital calculations of mono-, bi- and tri-methoxy-β-nitrostyrenes at the meta and para positions, we have characterized a long distance electronic charge transfer pattern ...
