Artículos de revistas: Recent submissions

Now showing items 4581-4600 of 4968

    • Seasonal and geographic variation in thermal biology of the lizard Microlophus atacamensis (Squamata: Tropiduridae) 
      Sepúlveda, Maritza; Vidal, Marcela A.; Fariña, José M.; Sabat Kirkwood, Alejandro Pablo (PERGAMON-ELSEVIER SCIENCE LTD, 2008-04)
      1. We studied physiological thermal adaptation in the lizard Microlophus atacamensis along a latitudinal range. 2. Field body temperatures were independent from thermal environmental conditions, and show seasonal, but not ...
    • Reduction of prion infectivity in packed red blood cells 
      Morales, Rodrigo; Buytaert-Hoefen, Kimberley A.; González Romero, Dennisse; Castilla, Joaquín; Hansen, Eric T.; Hlavinka, Dennis; Goodrich, Raymond P.; Soto, Claudio (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2008-12-12)
      The link between a new variant form of Creutzfeldt-Jakob disease (vCJD) and the consumption of prion contaminated cattle meat as well as recent findings showing that vCJD can be transmitted by blood transfusion have raised ...
    • AtHMA1 is a thapsigargin-sensitive Ca2+/heavy metal pump 
      Moreno, Ignacio; Norambuena Morales, Lorena; Maturana, Daniel; Toro, Mauricio; Vergara Montecinos, Cecilia; Orellana López, Ariel; Zurita Silva, Andrés; Ordenes, Viviana R. (AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC, 2008-04-11)
      The Arabidopsis thaliana AtHMA1 protein is a member of the P-IB-ATPase family, which is implicated in heavy metal transport. However, sequence analysis reveals that AtHMA1 possesses a predicted stalk segment present in ...
    • Isotopic evidence for hydrologic change related to the westerlies in SW Patagonia, Chile, during the last ... 
      Moy, Christopher M.; Dunbar, Robert B.; Moreno Moncada, Patricio; Francois, Jean-Pierre; Villa Martínez, Rodrigo; Mucciarone, David M.; Guilderson, Thomas P.; Garreaud Salazar, René (PERGAMON-ELSEVIER SCIENCE LTD, 2008-07)
      The Southern Hemisphere westerly winds influence the spatial distribution of precipitation in southern South America and play a significant role in the global carbon cycle, yet little is known about how this important ...
    • Steroids from the marine fungus Geotrichum sp. 
      San Martín Barrientos, Aurelio; Orejarena, Silvia; Gallardo, Claudia; Silva, Mario; Becerra, José; Reinoso, Rodrigo; Chamy, María C.; Vergara, Karen; Rovirosa, Juana (SOC CHILENA QUIMICA, 2008-03)
      Ergosterol 1, peroxyergosterol 2, ergosta-4,6,8(14), 22-tetraen-3-one 3 and 24-ethyl-cholesta-4-ene-3-one 4 were isolated from the cultures of a fungus Geotrichum sp. obtained from a marine sediment. It was established ...
    • Divalent metal transporter 1 (DMT1) contributes to neurodegeneration in animal models of Parkinson's disease 
      Salazar, Julio; Mena, Natalia P.; Hunot, Stephane; Prigent, Annick; Alvarez Fischer, Daniel; Arredondo Olguín, Miguel Armando; Duyckaerts, Charles; Sazdovitch, Veronique; Zhao, Lin; Garrick, Laura M.; Núñez González, Marco; Garrick, Michael D.; Raisman Vozari, Rita; Hirsch, Etienne C. (NATL ACAD SCIENCES, 2008-11-25)
      Dopaminergic cell death in the substantia nigra (SN) is central to Parkinson’s disease (PD), but the neurodegenerative mechanisms have not been completely elucidated. Iron accumulation in dopaminergic and glial cells ...
    • Imprinting of CCR9 on CD4 T cells requires IL-4 signaling on mesenteric lymph node dendritic cells 
      Elgueta, Raúl; Sepúlveda, Fernando E.; Vilches, Felipe; Vargas, Leonardo; Mora, J. Rodrigo; Bono Merino, María Rosa; Rosemblatt Silber, Mario César (AMER ASSOC IMMUNOLOGISTS, 2008-05-15)
      It has recently been shown that IL-4 can educate dendritic cells (DC) to differentially affect T cell effector activity. In this study, we show that IL-4 can also act upon DC to instruct naive T cells to express the ...
    • On the classification of commutative right-nilalgebras of nilindex 5 and dimension 4 
      Elduque, Alberto; Labra Jeldres, Alicia (TAYLOR & FRANCIS INC, 2008-05)
      Gerstenhaber and Myung (1975) classified all commutative power-associative nilalgebras of dimension 4. In Elduque and Labra (2007), Gerstenhaber and Myung's results are generalized by giving a classification of commutative ...
    • Do changes in dietary chemistry during ontogeny affect digestive performance in adults of the herbivorous ... 
      Sabat Kirkwood, Alejandro Pablo; Bozinovic, Francisco (ELSEVIER SCIENCE INC, 2008-11)
      We characterize the flexibility in digestive performance in degus (Octodon degus) an herbivorous rodent. We tested the hypothesis that dietary and physiological-digestive flexibility are correlated. Degus were fed with ...
    • AHL communication is a widespread phenomenon in biomining bacteria and seems to be involved in mineral-adhesion ... 
      Ruiz, Lina María; Valenzuela, Susana; Castro, Matías; Gonzalez, Alex; Frezza, Marine; Soulère, Laurent; Rohwerder, Thore; Queneau, Yves; Doutheau, Alain; Sand, Wolfgang; Jerez Guevara, Carlos; Guiliani Guerin, Nicolás (ELSEVIER SCIENCE BV, 2008-11)
      Biofilm development plays a pivotal role in the bioleaching process. Quorum sensing (QS) is recognized as one of the main regulatory ways of extracellular polymeric substances (EPS) production and biofilm formation in ...
    • Intercalation of polyethylene oxide in layered thiophosphate of Bi and Sb 
      Ruiz León, Domingo; Galdámez Silva, Antonio; Manríquez Castro, Víctor (SOC CHILENA QUIMICA, 2008-06)
      The intercalation compounds Li0.43(PEO)2.4(H2O)1.4K0.57BiP2S6 and Li0.38(PEO)2.1(H2O)1.6K0.62SbP2S6 have been synthesized by the insertion of polyethylene oxide PEO in LiKMP2S6 (M=Bi, Sb), that contained Li+ and K+ ...
    • Cyanobacterial diversity in Salar de Huasco, a high altitude saline wetland in northern Chile: an example ... 
      Dorador, Cristina; Vila Pinto, Irma; Imhoff, Johannes F.; Witzel, Karl-Paul (BLACKWELL, 2008-06)
      The diversity of Cyanobacteria in water and sediment samples from four representative sites of the Salar de Huasco was examined using denaturing gradient gel electrophoresis and analysis of clone libraries of 16S rRNA gene ...
    • Caco-2 Intestinal Epithelial Cells Absorb Soybean Ferritin by u2 (AP2)-Dependent Endocytosis1,2 
      San Martín Rovirosa, Carol; Garri, Carolina; Pizarro Aguirre, Fernando; Walter, Tomas; Theil, Elizabeth C.; Núñez González, Marco (Journal of Nutrition, 2008-05)
      Iron deficiency, a condition currently affecting ;3 billion people, persists in the 21st century despite half a millennium of medical treatment. Soybean ferritin (SBFn), a large, stable protein nanocage around a mineral ...
    • Hydraulic lift in three shrub species from the Chilean coastal desert 
      Muñoz, M. R.; Squeo, F. A.; León, M. F.; Tracol, Y.; Gutiérrez, J. R. (ACADEMIC PRESS LTD ELSEVIER SCIENCE LTD, 2008-05)
      Hydraulic lift is defined as the passive movement of water through roots from wetter, deeper soil layers into drier shallower layers along a gradient in soil water potential. This process is generally found in plant species ...
    • Molecular analysis of enrichment cultures of ammonia oxidizers from the Salar de Huasco, a high altitude ... 
      Dorador, Cristina; Busekow, Annika; Vila Pinto, Irma; Imhoff, Johannes F.; Witzel, Karl-Paul (SPRINGER TOKYO, 2008-05)
      We analyzed enrichment cultures of ammonia-oxidizing bacteria (AOB) collected from different areas of Salar de Huasco, a high altitude, saline, pH-neutral water body in the Chilean Altiplano. Samples were inoculated into ...
    • Genetic relationships in apricot (Prunus armeniaca L.) using SSR markers and their implications for breeding 
      Donoso, J. M.; Aros Orellana, Danilo; Meneses, C.; Narváez, C.; Infante Espiñeira, Rodrigo (WFL PUBL, 2008-10)
      In this paper we evaluated the genetic diversity among apricot cultivars of different origins using SSR markers. Thirty-one apricot cultivars were evaluated, including one Japanese plum and one apricot x plum hybrid as ...
    • Water deficit as a driver of the mutualistic relationship between the fungus Trichoderma harzianum and two ... 
      Donoso, Eduardo P.; Bustamante Araya, Ramiro; Carú Marambio, Margarita; Niemeyer Marich, August (AMER SOC MICROBIOLOGY, 2008-03)
      The aim of this study was to assess the occurrence of mutualistic interactions between the fungus Trichoderma harzianum and two wheat genotypes, Triticum aestivum cv. Talhuen and T. turgidum subsp. durum cv. Alifen, and ...
    • Synthesis and Characterization of N3P3(O2C12H8)(2)(OC6H4Si(CH3)(3))(OC6H4Br) and Its Conversion to ... 
      Díaz Valenzuela, Carlos; Valenzuela, María Luisa; Ushak, Svetlana (Springer, 2008)
      A new silicated cyclotriphosphazene N3P3(O2C12H8)(2)(OC6H4Si(CH3)(3))(OC6H4Br) 1 has been synthesized and characterized. The solid state pyrolysis of 1 in air gives a nanostructured SiP2O7 3D network. The morphology of the ...
    • Modulatory effects of histamine on cat carotid body chemoreception 
      Río, Rodrigo del; Moya, Esteban A.; Koenig, Cecilia S.; Fujiwara, Kunio; Alcayaga Urbina, Julio; Iturriaga, Rodrigo (ELSEVIER, 2008-12-31)
      Histamine has been proposed to be an excitatory transmitter between the carotid body (CB) chemoreceptor (glomus) cells and petrosal ganglion (PG) neurons. The histamine biosynthetic pathway, its storage and release, as ...
    • Relativistic effects on the hexafluorides of group 10 metals 
      David, Jorge; Fuentealba Rosas, Patricio; Restrepo, Albeiro (ELSEVIER, 2008-05-20)
      We present relativistic and non-relativistic ab initio treatments of the hexafluorides of group 10 metals. Non-relativistic equilibrium geometries belong to the D-4h point group while relativistic calculations afford O-h ...