Now showing items 4221-4240 of 4968

    • Muñoz Alvarado, Raúl; Suárez, Marco Antonio; Oyarzún, Simón; Henríquez, Ricardo; Espinosa, Andrés; Kremer Erdmann, Germán; Moraga, Luis; Cancino, Simón; Morales, Roberto (AMER PHYSICAL SOC, 2010-04-05)
      We report the measurement of the longitudinal magnetoresistance, performed on 4 thin gold films of different thickness evaporated onto preheated mica, where the signal can be univocally attributed to electron-surface scattering. ...
    • Cretton, Sylvian; Glauser, Gaetan; Humam, Munir; Jeannerat, Damien; Muñoz Muñoz, Orlando; Maes, Louis; Christen, Philippe; Hostettmann, Kurt (AMER CHEMICAL SOC, 2010-02-18)
      Investigation of the aerial parts of Schizanthus tricolor yielded seven isomeric tropane alkaloids: 3 alpha-(1-methylitaconyl)-6 beta-senecioyloxytropane 3a-(1-methylitaconyl)-6 beta-angeloyloxytropane (2), 3 alpha-(1-me ...
    • Cárdenas Valencia, Carlos; Tiznado Vásquez, William; Ayers, Paul W.; Fuentealba Rosas, Patricio (AMER CHEMICAL SOC, 2011-02-25)
      In the course of a reaction it is the shape of the Fukui potential that guides a distant reagent toward the site where an electrophile/nucleophile is willing to accept/ donate charge. In this paper we explore the ...
    • Anic, Vinka; Hinojosa Opazo, Luis; Díaz Forester, Javiera; Bustamante, Elena; Fuente, Luz María de la; Casale, Jean Francois; Harpe, Jean Paul de la; Montenegro, Gloria; Ginocchio, Rosanna (INST ARCTIC ALPINE RES, UNIV COLORADO, 2010-01)
      Temperature is one of the major abiotic factors influencing distribution and productivity of alpine plant species. Although some edaphic parameters (e.g. soil acidity) have also been suggested as determinants in the ...
    • Fuentes, S.; Ayala, M. V.; Benavente Espinosa, Eglantina; González Moraga, Guillermo (TAYLOR & FRANCIS LTD, 2010)
      A series of new Chitosan=poly(mercaptopropysiloxane) hybrid films were obtained by blending mercaptopropylsiloxane oligomers (pMPS) with chitosan (CHI). The MPS oligomers were prepared by sol-gel using as precursor ...
    • Donoso, J. P.; Tambelli, C. E.; Magon, C. J.; Mattos, R. I.; Silva, I. D. A.; De Souza, J. E.; Moreno, M.; Benavente Espinosa, Eglantina; González Moraga, Guillermo (TAYLOR & FRANCIS LTD, 2010)
      Impedance spectroscopy and nuclear magnetic resonance (NMR) were used to investigate the mobility of water molecules located in the interlayer space of Hþ – exchanged bentonite clay. The conductivity obtained by ac ...
    • Díaz Valenzuela, Carlos; Valenzuela, María Luisa; Laguna, Antonio; Lavayen, Vladimir; Jiménez, Josefina; Power, Lynn A.; O’Dwyer, Colm (AMER CHEMICAL SOC, 2010-09-04)
      We present a method for the preparation and deposition of metallic microstructures and nanostructures deposited on silicon and silica surfaces by pyrolysis in air at 800 C of the corresponding metallophosphazene (cyclic ...
    • Foreword 
      Benavente Espinosa, Eglantina; González Moraga, Guillermo; Kajzar, F.; Rau, Ileana (Taylor & Francis Group, 2010)
    • Abin Carriquiry, Juan Andrés; Paulino Zunini, Margot; Cassels Niven, Bruce; Wonnacott, Susan; Dajas, Federico (PERGAMON-ELSEVIER SCIENCE LTD, 2010-05-06)
      Homology models of nicotinic acetylcholine receptors (nAChRs) suggest that subtype specificity is due to non-conserved residues in the complementary subunit of the ligand-binding pocket. Cytisine and its derivatives ...
    • Torres Contreras, Hugo; Canals Lambarri, Mauricio (SPRINGER/PLENUM PUBLISHERS, 2010-05-01)
      Animals display foraging trajectories when exploiting food patches. These displacements have been studied, particularly in organisms that forage from a central place. The complexity of a movement path may be analyzed by ...
    • Silva, Nataly; Moris, Silvana; Herrera, Bárbara; Castro Díaz, Maximiliano; Kogan Bocian, Marcelo; Barrientos, Lorena; Yutronic Sáez, Nicolás; Jara Vergara, Paul (TAYLOR & FRANCIS LTD, 2010)
      This work presents the preparation of copper nanoparticles (CuNPs), using as support, inclusion compounds (ICs) formed by a-cyclodextrin (a-CD) with alkylamines as guests. These ICs provide a suitable environment to ...
    • Rivas, Cristóbal (WALTER DE GRUYTER & CO, 2010-03-29)
      We classify C-orderable groups admitting only finitely many C-orderings. We show that if a C-orderable group has infinitely many C-orderings, then it actually has uncountably many C-orderings, and none of these is isolated ...
    • Paris Pizarro, Irmgard; Pérez Pastene, Carolina; Cárdenas, Sergio; Iturra, Patricio; Muñoz, Patricia; Couve, Eduardo; Caviedes Fernández, Pablo; Segura Aguilar, Juan (SPRINGER, 2010-01-20)
      Abstract In previous studies, we observed that cells treated with aminochrome obtained by oxidizing dopamine with oxidizing agents dramatically changed cell morphology, thus posing the question if such morphological changes ...
    • Otero, Rodrigo A.; Soto Acuña, Sergio; Rubilar Rogers, David (INST PALEOBIOLOGII PAN, 2010-02-11)
      The revision by Hiller et al. (2005) of the species Mauisaurus haasti Hector (Plesiosauroidea, Elasmosauridae) from the Late Cretaceous of New Zealand, has provided reliable postcranial characters that permit recognition ...
    • Muñoz, Marcelo A.; Chamy, Cristina; Carrasco, Alvaro; Rovirosa, Juana; San Martín Barrientos, Aurelio; Joseph Nathan, Pedro (WILEY-BLACKWELL, 2009-11-06)
      The configuration of a chiral center in semisynthetic (2)-(2R,5R,5aR,8f,9aS)- 2,8-dibromo-2,5,9,9a-tetrahydro-5-hydroxy-5,8,10,10-tetramethyl-6H-2,5a-methano-1-benzoxepin- 7(8H)-one (3 or 4), prepared in two steps from ...
    • Lavín, Roberto; Denardin, Juliano C.; Cortés, Andrea; Gómez, Humberto; Cornejo, Manuel; González Moraga, Guillermo (TAYLOR & FRANCIS LTD, 2010)
      Arrays of Co nanowires with different lengths and diameters have been prepared by electrodeposition into nanopores of alumina and polycarbonate membranes. The dependence of the coercivity and remanence of the arrays as ...
    • Hood, Michael E.; Mena-Alı, Jorge I.; Gibson, Amanda K.; Oxelman, Bengt; Giraud, Tatiana; Yockteng, Roxana; Arroyo, Mary T. K.; Conti, Fabio; Pedersen, Amy B.; Gladieux, Pierre; Antonovics, Janis (WILEY-BLACKWELL, 2010-03-02)
      Understanding disease distributions is of fundamental and applied importance, yet few studies benefit from integrating broad sampling with ecological and phylogenetic data. Here, anther-smut disease, caused by the fungus ...
    • Grossi, Bruno; Canals Lambarri, Mauricio (WILEY-LISS, DIV JOHN WILEY & SONS INC, 2010-03-08)
      We analyzed the morphology and the walk–trot and trot–gallop transition velocities of nine juvenile horses and compared them with their mothers. We also compared the relative stride length and the duty factor of the ...
    • González Wevar, Claudio; Nakano, Tomoyuki; Cañete, Juan I.; Poulin, Elie (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2010-02-06)
      The evolution and the historical biogeography of the Southern Ocean marine benthic fauna are closely related to major tectonic and climatic changes that occurred in this region during the last 55 million years (Ma). ...
    • van Dongen, Wouter F. D.; Munimanda, Gopi K.; Augustin, Jakob; Blomqvist, Donald; Szép, Tibor; Wagner, Richard H. (SPRINGER, 2010-03-07)
      We isolated and characterised six novel microsatellite loci for paternity analysis in the sand martin Riparia riparia, by screening an enriched genomic library. In addition, we tested 16 already published microsatelli ...