Repositorio Académico de la Universidad de Chile: Recent submissions
Now showing items 44481-44500 of 98852
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(2002)The stability, refolding, and assembly properties of FtsZ cell division proteins from Methanococcus jannaschii and Escherichia coli have been investigated. Their guanidinium chloride unfolding has been studied by circular ...
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(2002)The exact mechanism of cell death in neurodegenerative diseases remains obscure, although there is evidence that their pathogenesis may involve the formation of free radicals originating from the oxidative metabolism of ...
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(2002)Theoretical studies on the thermolysis of three ethyl β-hydroxycarboxylates in the gas phase were carried out using ab initio theoretical methods, at the MP2/6-31G(d) and MP2/6-311++G(2d,p)//MP2/6-31G(d) levels of theory. ...
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(Academic Press Inc., 2002)We report here the identification and characterization of a novel gene (AUTS2) that spans the 7q11.2 breakpoint in a monozygotic twin pair concordant for autism and a t(7;20) (q11.2; p11.2) translocation. AUTS2 is 1.2 Mb ...
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(2002)This study evaluated the antioxidant defense system of the rat kidney following chronic exposure to red wine rich in flavonols. Both ethanol and antioxidant non-alcoholic wine components, mainly polyphenols, could contribute ...
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(2002)The crystal structure of Na2Si3O7 has been determined by direct methods using integrated intensities of conventional X-ray powder diffraction data and subsequently refined with the Rietveld technique. The title compound ...
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(2002)For territorial organisms, recognition of familiar individuals can reduce the frequency and intensity of aggressive encounters ('dear enemy' phenomenon), stabilize social systems, and reduce the cost of territory maintenance. ...
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(2002)Endemic taxa are those restricted to a specific area, and could be defined as the exclusive biodiversity of a region. An area of endemism contains taxa found nowhere else and could be catalogued as irreplaceable and of ...
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(2002)A new species of lizard, belonging to the montanus group of the genus Liolaemus, is described from the northern Chile. The specimens of the new species were collected in February, 1999 at the Farellones de Tara, Loa Province, ...
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(2002)Pollen analysis of two sediment records from a coastal swamp forest site in the Chilean semiarid region (31°50′S; 71°28′W) shows an alternation of dry and wet phases during the past ∼6100 cal yr B.P. The most prominent ...
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(2002)Wnt signalling has been implicated in antero-posterior patterning of the vertebrate embryonic body axis and in a number of other developmental processes. One of the downstream effectors of Wnt signalling is the β-catenin ...
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(Company of Biologists Ltd, 2002)It has been observed that the relationship between locomotor performance and body mass in terrestrial mammals does not follow a single linear trend when the entire range of body mass is considered. Large taxa tend to ...
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(2002)The Palaeoarctic parasitoid Aphidius ervi Haliday (Hymenoptera, Aphidiidae) parasitises legume aphids in its region of origin. In Chile, it parasitises both legume and cereal aphids. This special situation was studied at ...
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(Academic Press Inc., 2002)Central Chile (32-35°S) lies at the northern border of strong Westerly influence and thus exhibits a steep precipitation gradient. Therefore, the palaeoclimatic archives in the region are suitable for detecting past moisture ...
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(2002)The production of active microcin E492, a channel-forming bacteriocin, was studied in exponential and stationary phase. The structural gene for this bacteriocin (mceA) is transcribed in exponential as well as in stationary ...
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(Sociedad de Biologia de Chile, 2002)We studied a chronosequence of forest fragments in northern Chiloé Island, southern Chile, with the aim of assessing ecosystem recovery patterns following anthropogenic disturbance. Hypotheses regarding successional trends ...
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(Polish Academy of Sciences, 2002)The wing morphology of bats is very diverse, and may correlate with energetic, behavioural, and ecological demands. If these demands conflict, wing shape may reflect compromise solutions. In this study, we compared the ...
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(2002)Theoretical studies of the thermolysis of two α-amino acid ethyl esters in the gas phase were carried out using ab initio theoretical methods, at the HF/6-31G(d) and the MP2/6-311 + G(2d,p)//MP2/6-31G(d) levels of theory. ...
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(2002)The series of complexes [N3P3(OC6H5)5 OC6H4CH2CN·MCln] PF6, N3P3(OC6H4CH2 CN)6·(MCln)6] (PF6)6, [N3P3(OC6H5)5 OC6H4CH2CN·MCln-1]Cl and [N3P3(OC6H4CH2 CN)6·(MCln-1)6]Cl6, MCln = MnCl2, FeCl3, COCl2, NiCl2, CuCl2 have been ...
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(2002)Induced plant responses may affect the behaviour and growth of the attacking herbivore insect. The aphid Sipha flava (Forbes) produces reddish spots on the infested leaf of its host plant Sorghum halepense (L.). In order ...
