Now showing items 621-640 of 4968

    • Guixé Leguía, Victoria Cristina (Taylor & Francis, 2000)
      Modification of Escherichia coli phosphofructokinase-2 (Pfk-2) with N- (1-pyrenil)maleimide results in an enzyme form that is inactive. However, the rate of modification is drastically reduced in the presence of the ...
    • Glavic Maurer, Álvaro; Gómez Skarmeta, José Luis; Mayor, Roberto (Wiley, 2001)
      Th e Iroquoi s gene scod eforho- meodomai nprotein stha thav ebee nimplicated intheneura ldevelopmen tof Drosophil a an dver- tebrates .Wesho w her eforthefirs ttim ethat Xiro-1 ,on eofthe X ...
    • Quesada, Luisa; Areche Medina, Carlos; Astudillo, Luis; Gutiérrez, Margarita; Sepúlveda, Beatriz; San Martín Barrientos, Aurelio (Natural Products, 2012)
      Four isoflavones, isolated from the whole plant of Azorella madreporica, were identified as angustone C (1), alpinumisoflavone (2), licoisoflavone A (3) and isolupalbigenin (4) by spectroscopic studies. The compounds were ...
    • González Moraga, Guillermo; Santa Ana, María Angélica; Sánchez, Víctor; Benavente Espinosa, Eglantina (Gordon Breach, 2000)
      Chemical modification of molybdenum disulfide based either in the restacking of the layered solid or the intercalation of lithium or organic donors as poly(ethylene oxide) or dialkylamines lends to products with improved ...
    • Mendizábal Emaldía, Fernando (John Wiley, 1999)
      The basis-set dependence and quasirelativistic and nonrelativistic effects on the Au - C2H4 interaction are examined at the ab initio level. The effects on the interaction energies are modulated by f-type polarization ...
    • Burgos, Patricia; Metz, Claudia; Bull, Paulina; Pincheira, Roxana; Massardo, Loreto; Errázuriz, Carolina; Bono Merino, María Rosa; Jacobelli, Sergio; González, Alfonso (AAAS, 2000)
      OBJECTIVE: To explore the role of the NF - kappaB/Rel transcription factor family in autoimmunity, we investigated whet her peripheral blood mononuclear cells (PBMC) and T cells from the blood of patients ...
    • Perrin, Robyn M.; DeRocher, Amy E.; Bar-Peled, Maor; Zeng, Weiqing; Norambuena Morales, Lorena; Orellana, Ariel; Raikhel, Natasha V.; Keegstra, Kenneth (1999)
      Cell walls are crucial for development, signal transduction, and disease resistance in plants. Cell walls are made of cellulose, hemicelluloses, and pectins. Xyloglucan (XG), the principal load-bearing hemicellulose of ...
    • Medel Contreras, Rodrigo (Ecological Society of America, 2000)
      A two-year field study was conducted to evaluate the potential of two cactus species, Echinopsis chilensis and Eulychnia acida, to evolve defensive traits against the parasitic mistletoe Tristerix aphyllus (Loranthaceae). ...
    • Muñoz, Marcelo A.; Areche Medina, Carlos; San Martín Barrientos, Aurelio; Rovirosa, Juana; Joseph-Nathan, Pedro (2009)
      The absolute configuration of the pentacyclic ichthyotoxin stypotriol, a constituent of Stypopodium zonale, was deduced to be 3S,5R,8R,9R,10S,13S,14S-(-) -1 by vibrational circular dichroism spectroscopy of the derived ...
    • Allnutt, T. R.; Newton, A. C.; Lara, A.; Premoli, A.; Armesto, Juan J.; Vergara, R.; Gardner, M. (Blackwell, 1999)
      Fitzroya cupressoides (alerce, Cupressaceae) is a large and exceptionally long-lived conifer, endemic to a restricted area of southern Chile and neighbouring areas of Argentina. As a result of its high economic value, ...
    • Martín González, Yves; Osses, Denis (Springer, 2011)
      We generalize Weil's converse theorem to Jacobi cusp forms of weight k, index m and Dirichlet character χ over the group Γ0(N)⋉ℤ2. Then two applications of this result are given; we generalize a construction of Jacobi forms ...
    • Vergara Montecinos, Cecilia; Álvarez Araya, Osvaldo; Latorre, Ramón (The Rockefeller University, 1999)
      Using Ba2 1 as a probe, we performed a detailed characterization of an external K 1 binding site located in the pore of a large conductance Ca2 1-activated K 1 (BKCa) channel from skeletal muscle incorporated into planar ...
    • Eisenman, George; Aqvist, Johan; Álvarez Araya, Osvaldo (Royal Soc Chemistry, 1991)
      As a step to increasing the reliability of the calculation of free energies underlying ion binding and transport in protein channels, free energy perturbation simulations have been performed for the binding of alkali-metal ...
    • Bono Merino, María Rosa; Reyes, Lilian I.; Rosemblatt Silber, Mario César (1999)
      We present a simple non-radioactive cytometry-based assay that permits the simultaneous quantitation of cell adhesion of distinct subsets of cells contained in a mixture without any previous fractionation. The procedure ...
    • Imamoglu, Özlem ̈; Martin, Yves (2009)
      We define a twisted two complex variables Rankin-Selberg convolution of Siegel cusp forms of degree 2. We find its group of functional equations and prove its analytic continuation to ℂ2. As an application we obtain a ...
    • Molina Gálvez, Mario; Rössler, Jaime (Sociedad Mexicana de Fisica, 1998)
      We study Bose-Einstein condensation (BEC) for a non-interacting gas in a very anisotropic trap. Therefore, at enough small temperatures some degrees of freedom "freeze", thus reducing the "effective" dimensionality of the ...
    • Poulin, Elie; Cárdenas, L.; Hernández, C. E.; Kornfield, I.; Ojeda, F. P. (Blackwell Publishing Ltd, 2004)
      Phylogeographic reconstructions using mitochondrial DNA sequences from both the control region and the cytochrome b gene demonstrated that two disjunct populations be recognized as Trachurus murphyi and Trachurus symmetricus. ...
    • Lennon Duménil, Ana María; Ottone, Catherine; Rosemblatt Silber, Mario César; Fellous, Marc; Bono Merino, María Rosa; Alcaïde-Loridan, Catherine (Springer-Verlag, 1998)
      In this study, various sets of somatic cell hybrids, generated by the fusion of epithelial cell lines with B-lymphoblastoid cell lines, were analyzed for the expression of major histocompatibility complex (MHC) class ...
    • Jara Vergara, Paul; Yutronic Sáez, Nicolás; González Moraga, Guillermo (Taylor and Francis, 1998)
      13C CP-MAS NMR spectra of thiourea host-guest inclusion compounds containing amines, 1-azabicyclo[2.2.2]octane, 1,4-diazabicyclo[2.2.2]octane, 3-azabicyclo[3.2.2]nonane and 1, 3, 5, 7 tetrazadamantane at 25°C are reported. ...
    • Vergara Montecinos, Cecilia; Latorre, Ramón; Marrion, Neil V.; Adelman, John P. (Elsevier Ltd, 1998)
      Calcium-activated potassium channels are fundamental regulators of neuronal excitability, participating in interspike interval and spike-frequency adaptation. For large-conductance calcium-activated potassium (BK) channels, ...