Artículos de revistas: Recent submissions
Now showing items 4721-4740 of 4968
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(SOCIEDAD CHILENA DE QUIMICA, 2006-03)A simple synthetic route for the preparation of 2-phenyl-1,3-propanediamines, based on a Knoevenagel-Michael double condensation followed by reduction, was developed using nitromethane as reagent and solvent, and sodium ...
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(COMPANY OF BIOLOGISTS LTD, 2006-10-15)The transition from trot to gallop in quadruped mammals has been widely hypothesized to be a strategy to minimize the energetic costs of running. This view, however, has been challenged by some experimental evidence ...
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(BLACKWELL, 2006-02)Aim We ask whether contemporary forests of the Chilean Coastal Range can be considered to be direct and conservative descendants of pre-Pleistocene palaeofloras that occurred in southern South America from the Palaeogene ...
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(ASSOC BRAS DIVULG CIENTIFICA, FACULDADE MEDICINA, 2006-09)
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(AMER INST PHYSICS, 2006-05-15)First-principles calculations of the single-crystal elastic constants of the body-centered cubic phase of bismuth are carried out in the pressure range of 31-191 GPa. The calculations are performed in the framework of ...
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(ELSEVIER, 2006-06-24)We propose and test a new reactivity index tentatively called homofugality, to quantitatively rank the leaving group ability of radical fragments present in homolytic substitution reactions. The model is validated for a ...
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(ELSEVIER, 2006-02-15)In this Letter, the mathematical expressions corresponding to the kernel, local and global spin softness have been derived, and their relationship with other indices have been explored. Introducing various spin kernels, ...
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(ELSEVIER, 2006-03)In teleosts, the lateral line system is composed of neuromasts containing hair cells that are analogous to those present in the inner ear of all vertebrates. In the zebrafish embryo and early larva, this system is composed ...
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(SPRINGER, 2006-05)Habitat fragmentation modifies ecological patterns and processes through changes in species richness and abundance. In the coastal Maulino forest, central Chile, both species richness and abundance of insectivorous birds ...
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(WILEY-LISS, DIV JOHN WILEY & SONS, 2006-12)An important body of evidence documents the differential expression of ion channels in brains, suggesting they are essential to endow particular brain structures with specific physiological properties. Because of their ...
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(ELSEVIER, 2006-04-20)Surface properties of aqueous solutions of mixtures of humic acid, HA, and a series of cationic surfactants, C(n)TAB, have been studied. For a fixed amount of HA, the concentration of surfactant at which micelle-like ...
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(SOCIEDAD CHILENA DE QUIMICA, 2006-06)A Density Functional microscopic model of C-60, consisting of seven molecular orbitals (3 occupied and 4 empty), was employed to get the best values for the half-width and the scanning distance of the mathematical function ...
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(SOCIEDAD CHILENA DE QUIMICA, 2006-12)Two medium-sized molecular systems X-60 (X=C,N) were analyzed using Extended Huckel, Density Functional and ab initio Hartree-Fock methods. The aim of the work was to test the reliability of the EHT methodology to calculate ...
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(PERGAMON-ELSEVIER SCIENCE LTD, 2006-08)We assessed responses of late copepodid stages of Calanus chilensis, as subject to spatial heterogeneity in oceanographic conditions. during coastal upwelling off Mejillones Peninsula., northern Chile. An oceanographic ...
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(ELSEVIER, 2006-10-01)The solitonic-like solutions predicted by the continuum semi-classical two-dimensional XY-model are investigated using canonical Monte Carlo simulation. In particular, we verify the existence of kink states, and study their ...
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(WILEY-LISS, DIV JOHN WILEY & SONS INC, 2006-03)The aim of this work is to determine when and how ooplasmic segregation is initiated in the zebrafish egg. To this end, the organization of the ooplasm and vitelloplasm were examined in oocytes and eggs shortly after ...
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(JOHN WILEY & SONS, 2006-06)The anthocyanin composition of berries of Maqui [Aristotelia chilensis (Mol.) Stuntz] was deter-mined by HPLC with photodiode array and MS detection. Eight pigments corresponding to the 3-glucosides, 3,5-diglucosides, ...
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(ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2006-12)Chemical, electrochemical and flow variables were optimized to examine the effectiveness of the electrocoagulation process for the removal of copper, lead and cadmium. The electrochemical process, which uses electrodes of ...
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(BLACKWELL, 2006-09)Individuals of social and partially social species typically reduce their vigilance activity when foraging in groups. As a result, per capita risk of predation decreases and individuals allocate more time to foraging and ...
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(SOCIEDAD CHILENA DE QUIMICA, 2006-06)The spectroelectrochemical properties of a conducting polymer derived from Co(II) tetra-3-amino-phenyl-porphyrin,(poly-Co(II)-TAPP) were studied towards the electrochemical reduction of CO2 on ITO Surface. Under inert ...
