Repositorio Académico de la Universidad de Chile: Recent submissions
Now showing items 44101-44120 of 98648
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(Academic Press Inc., 1996)Ion channels are deeply involved in sperm physiology. In sea urchin sperm cyclic nucleotide levels increase during quimotaxis and in the acrosome reaction (AR). Although cyclic nucleotides are second messengers known to ...
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Possible involvement of the phloem sealing system in the acceptance of a plant as host by an aphid (Birkhauser Verlag AG, 1996)Possible reasons for the rejection of some lines of Triticum monococcum (Tm44 and Tm46) by the aphid Sitobion avenae were explored. In all T. monococcum lines studied, whether unfavourable (non-host/resistant plant) or ...
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(Springer Verlag, 1996)The effects of temperature and photoperiod on the ability of wheat (Triticum aestivum L.) seedlings to show induced responses (increased accumulation of hydroxamic acids, Hx) upon infestation by the bird cheery-oat aphid. ...
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(Thieme, 1996)Parasitic diseases are widespread in less developed countries, and are a major cause of suffering and inability of the affected populations to improve their own living conditions. Among these diseases, American trypanosomiasis ...
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(1998)Lumbering of Fitzroya cupressoides in Chile began in 1599 and continued until 1976, when the species was declared a national monument and cutting of live trees was prohibited. Today, F. cupressoides is threatened; many of ...
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(Walter de Gruyter GmbH, 1996)We contrasted two approaches to test the hypothesis that microclimate influences selection of microhabitat by two species (Abrothryx longipilis and Phyllotis darwini) of nocturnal rodents of central Chile. Microhabitats ...
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(Kluwer Academic Publishers, 1995)A simple, sensitive and selective method by solvent extraction-first derivative spectrophotometry is described for the determination of microamounts of copper in water by means of its reaction and extraction at pH 8.0 with ...
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(1995)Feeding behaviour of five species of cereal aphids in wheat seedlings differing in hydroxamic acid (Hx) levels, was monitored via electrical penetration graphs (EPG). Aphid species could be grouped as sensitive to the ...
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(Elsevier, 2001)The electronic structures of one-dimensional metallomacrocycles with bidentate bridging ligands, such as -[MacM(L)]n (Mac = phthalocyaninato dianion, tetrabenzoporphyrinato dianion; M = Fe(II), Ru(II), Os(II); L = dabco, ...
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(Lippincott Williams and Wilkins, 2001)In vertebrate olfactory receptor neurons, NO synthase (NOS) has been detected in embryonic and early postnatal stages. However, expression of the enzyme in the mature epithelium is still controversial. We analyzed the ...
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(2001)The synthesis of low-density polyethylene from ethylene as the only monomer feed has been investigated as an alternative route to branched polyethylene and to obtain new materials with different properties, avoiding the ...
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The P450-1 gene of Gibberella fujikuroi encodes a multifunctional enzyme in gibberellin biosynthesis (2001)Recent studies have shown that the genes of the gibberellin (GA) biosynthesis pathway in the fungus Gibberella fujikuroi are organized in a cluster of at least seven genes. P450-1 is one of four cytochrome P450 monooxygenase ...
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(2001)The postcentral sulcus has two fissurization patterns: (I) the sulcus extends continuously into the sylvian fissure; (II) the sulcus is interrupted in its trajectory. In the left but not in the right hemisphere, there was ...
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(Taylor and Francis Ltd., 2001)Thermodynamic and dynamic properties of intercalation products of lithium into MoS2 are strongly determined by the coordination of lithium in the interlaminar spaces. Lithium redox potentials as well as lithium diffusion ...
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(2001)Infrared (middle and far) and Raman spectroscopy were used to study the adsorption of vanadylnaphthalocyanine and vanadylporphine tetraphenyl substituted macrocycles adsorbed onto metallic surfaces. The IR spectra of the ...
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(2001)Understanding the relative timings of climate events in the Northern and Southern hemispheres is a prerequisite for determining the causes of abrupt climate changes. But climate records from the Patagonian Andes1-4 and New ...
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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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(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 ...
