Artículos de revistas: Recent submissions
Now showing items 1121-1140 of 4968
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(Elsevier, 1998)Here, we present the analysis of wood to determine trace elements in tree rings. We have irradiated wood pieces directly, for thick target PIXE, and also thin samples obtained by chemical treatment of the wood material. ...
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Predation and spatial distribution of the lizard Podarcis hispanica atrata: An experimental approach (Elsevier B.V., 1998)This study reports on an experiment designed to quantify potential predation by birds on the lizard Podarcis hispanica atrata in the Columbretes islands (Castellon, Spain). We used plasticine replicas to examine predation ...
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(Springer New York LLC, 1998)GC-MS analysis of volatiles released from wheat infested with a high density of aphids showed the presence of 6-methyl-5-hepten-2-ol (sulcatol). The proportion of enantiomers present in the volatiles was determined by ...
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(Springer New York LLC, 1998)Volatiles from wheat and oat seedlings elicited attraction in apterae and alatae Rhopalosiphum padi. Cereal volatiles were identified by GC-MS and olfactometric tests were performed with each compound. Attraction of aphids ...
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(1995)Bone mineralization was evaluated in 36 school age children with calcium intake below 50% of Recommended Dietary Allowances (RDA), and compared with 28 school age children with calcium intake higher than 100% of the RDA. ...
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(1998)The object of this study is to explore the transgenerational influence of the cognitive restraint in 34 mother-daughter dyads of average and below average level social-economical, referred for overweight outpatients of the ...
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(1998)In the early fall of 1996, a bloom of the toxic dinoflagellate Alexandrium catenella occurred in a fjord in the southern part of Chile that resulted in very high levels of paralytic shellfish poisoning (PSP) toxicity (up ...
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(1998)Segregation and proliferation of mitochondria, leading to formation of the teloplasms (pole plasms), were studied in eggs of the leech T. rude by immunocytochemistry, fluorescent time lapse video imaging, confocal and ...
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(1998)Stable red astaxanthin-producing transformants were obtained after genetic transformation of two Phaffia rhodozyma mutants. A yellow mutant, accumulating β-carotene, and an albino mutant, accumulating phytoene, from P. ...
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(1998)Background: Copper is an essential nutrient for humans. Recently, a limit of 31.48 μmol/l (2 mg/l) was proposed by the World Health Organization as the provisional guideline value for copper content of drinking water. The ...
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(1998)Objective: To assess the relative influence of maternal body composition at late gestation on birth weight. Methods: Maternal body composition was estimated in 224 women near term using a deuterium dilution technique. Using ...
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(1998)Stress, pathogens or insects induce profound changes in the expression of the chemical constituents of plants. Some of these changes could be adaptations to the new conditions or the expression of new defensive characteristics. ...
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Does digestion rate affect diet selection? A study in Octodon degus, a generalist herbivorous rodent (Springer Verlag, 1998)Dietary chemistry and an animal digestive physiology should be considered in any explanation of behavioral patterns of food use, as both influence dietary preference. In the degu Octodon degus (Molina, 1782), a generalist ...
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(1998)1. This paper investigates spatial habitat variation in flower visitation by avian pollinators (mainly Hummingbirds) and nectar robbers to Fuchsia magellanica at the southern limit of its range, Tierra del Fuego, and their ...
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(John Wiley and Sons Ltd, 1998)A new method is described for the quantification of 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA) and 2,4-dihydroxy-1,4-benzoxazin-3-one (DIBOA), the main hydroxamic acids in wheat and rye extracts, respectively, ...
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(1998)We have cloned and sequenced a 2,262-bp chromosomal DNA fragment from the chemolithoautotrophic acidophilic bacterium Leptospirillum ferrooxidans. This DNA contained an open reading frame for a 577oaminoacid protein showing ...
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(1998)A multiple Robertsonian fission chromosomal race of the Liolaemus monticola complex in Chile is described and is shown to be the most derived and the most complex among the Liolaemus examined thus far. The 29 karyotyped ...
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(1998)Mesoderm induction requires interaction between cells of the animal and vegetal hemispheres of the embryo. Several molecules have been proposed as candidates for mesoderm-inducing signals, with activin a particularly strong ...
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(1997)The population dynamics of Calanus chilensis (Copepoda: Crustacea) was analyzed using a mixture of field data and mathematical models. Field data were obtained in the Humboldt Current upwelling area, at Mejillones del Sur ...
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(1998)Several studies have demonstrated that the peptide LHRH can modify behavior in the male rat. Peripheral and intracerebral infusions of LHRH impair the acquisition of conditioned avoidance responses (CARs) and increase some ...
