Now showing items 1746-1765 of 2727

    • Silva Valenzuela, Cecilia; Velásquez, Felipe; Peñailillo, Johany; Garcías Papayani, H éctor; Fernández, Paulina; Tobar, Pía; Contreras, Inés; Santiviago Cid, Carlos; Álvarez Armijo, Sergio (Elsevier, 2016)
      Lipopolysaccharide (LPS) consists of three covalently linked domains: the lipid A, the core region and the O antigen (OAg), consisting of repeats of an oligosaccharide. Salmonella enterica serovar Enteritidis (S. Enteritidis) ...
    • Bittner, Mauricio; Saldías, Soledad; Estévez, C.; Zaldívar San Román, María Mercedes; Marolda, Cristina; Valvano, Miguel A.; Contreras, Inés (SOC GENERAL MICROBIOLOGY, 2002-12)
      The authors previously reported increased expression of the Salmonella enterica serovar Typhi (S. typhi) rfaH gene when the bacterial cells reach stationary phase. In this study, using a lacZ fusion to the rfaH promoter ...
    • Carter Jaña, Javier Antonio; Blondel, Carlos; Zaldívar San Román, María Mercedes; Álvarez Armijo, Sergio Aníbal; Marolda, Cristina L.; Valvano, Miguel A.; Contreras, Inés (SOC GENERAL MICROBIOLOGY, 2007-10)
      Shigella flexneri 2a 2457T produces lipopolysaccharide (LIPS) with two O-antigen (OAg) chain lengths: a short (S-OAg) controlled by WzzB and a very long (VL-OAg) determined by Wzz(pHS-2). This study demonstrates that the ...
    • Diaz, Eloisa (Sociedad Chilena de Quimica, 1999)
      The EPR spectra of a series of mononuclear complexes [CpFe(dppe)SR]PF6 R = C6H5 (1), C3H7 (2), p-C6H4Br (3) and the binuclear [CpFe(dppe)-S-CH2CH2-S-CpFe(dppe)](PF6) 2 (4) were measured. All the paramagnetic complexes ...
    • Huillet, Thierry; Martínez Aguilera, Servet (Springer, 2013)
      Estimating the number n of unseen species from a k-sample displaying only p ≤ k distinct sampled species has received attention for long. It requires a model of species abundance together with a sampling model. We start ...
    • Carrizo, Carla N.; Pitta Alvarez, Sandra I.; Kogan Bocian, Marcelo; Giulietti, Ana M.; Tomaro, María L. (PERGAMON-ELSEVIER SCIENCE LTD, 2001-07)
      The polyamine, cadaverine, was detected in transformed root cultures of Brugmansia candida (syn. Datuira candida), a Solanaceae which produces the tropane alkaloids scopolamine and hyoscyamine. To the best of our knowledge, ...
    • Chiong Lay, Mario; Lavandero González, Sergio; Ramos, Rodrigo; Aguillón Gutiérrez, Juan Carlos; Ferreira, Arturo (1991)
      Immunoaffinity chromatography involves binding of an antigen or antibody to a solid matrix, usually agarose, frequently using the cyanogen bromide method. These methods are laborious, rather expensive, and their use has ...
    • Pedreschi, Franco; Cocio, Claudia; Moyano, Pedro; Troncoso, Elizabeth (ELSEVIER SCI LTD, 2008-07)
      The objective of this research was to study the kinetics of oil absorption and distribution in the structure of potato slices during frying, considering the effects of three oil temperatures and a blanching pre-treatment. ...
    • Argandoña, Victor H.; Faini, Francesca (1993)
      The concentration of the triterpene oleanolic acid in leaves of Baccharis linearis varies at different stages of plant growth from 1.9 to 3.0 g kg-1 fr. wt. Larvae of Heliothis zea, starved with 1.4 mg of oleanolic acid ...
    • González, J. C.; García, S. I.; Bellú, Sebastián; Atria Salas, Ana María; Salas Pelegrin, Juan Manuel; Rockenbauer, A.; Korecz, L.; Signorella, Sandra; Sala, Luis F. (PERGAMON-ELSEVIER SCIENCE LTD, 2009-09-02)
      Selective oxidation of galacturonic residues of oligo and polyuronic acids by Cr-VI affords CO2/HCO2H, oxidized uronic acid, and Cr-III as final redox products. Kinetic studies show that the redox reaction proceeds through ...
    • Urzúa, Catalina; Prado González, Estefanía; Dueik, Verónica; Bouchon, Pedro; Giménez, Begoña; Robert Canales, Paz (Institution of Chemical Engineers, 2017)
      Olive leaves extract (OLE) was microencapsulated with inulin (OLE-IN) by spray-drying using a central composite design. Oleuropein encapsulation efficiency and recovery values were over 87% in the OLE-IN microparticles ...
    • Soto Andrade, Jorge; Yáñez Valdés, María Francisca (2014)
      We show that the Gel’fand character χG of a finite group G (i.e. the sum of all irreducible complex characters of G ) may be realized as a “ twisted trace” g 7→ T r(ρg ◦ T ) for a suitable involutive linear automorphism ...
    • Lissi Gervaso, Eduardo A.; Cáceres, T.; Llesuy, Susana; Solari, L.; Boveris, Alberto; Videla Cabrera, Luis (Informa Healthcare, 1989)
      The characteristics of the visible luminescence that follows the lipid peroxidative process were investigated either in the autoxidation of rat brain homogenates or in the azo-bis-arnidinopropane initiated lipid peroxidation ...
    • Arriagada, C.; Paris Pizarro, Irmgard; Matas, M. J. S. de las; Martínez Alvarado, P.; Cárdenas, S.; Castañeda, P.; Graumann, Rebecca; Pérez Pastene, C.; Olea Azar, Claudio; Couve, E.; Herrero, M. T.; Caviedes Fernández, Pablo; Segura Aguilar, Juan (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2004-07)
      Leukoaminochrome o-semiquinone radical is generated during one-electron reduction of dopamine oxidation product aminochrome when DT-diaphorase is inhibited. Incubation of 100 muM aminochrome with 100 muM dicoumarol, an ...
    • Ushak, S.; Spodine Spiridonova, Evgenia; Venegas Yazigi, Diego; Le Fur, E.; Pivan, J. Y.; Peña, O.; Cardoso-Gil, R.; Kniep, R. (Royal Society of Chemistry, 2005)
      The new hybrid organic-inorganic copper oxovanadium phosphates of composition Cu4(bipy)4V4O11(PO 4)2·nH2O (n ∼ 5) (1) and Cu 2(bipy)2V2P2O12 (2) (bipy = 2, 2′-bipyridine) adopting the triclinic symmetry were obtained by ...
    • Navarrete Encina, Patricio; Salazar, Ricardo; Vega-Retter, Christian; Pérez, Karina; Squella Serrano, Juan; Núñez Vergara, Luis (Sociedade Brasileira de Química, 2010)
      Substituted chromenos, dihydropyridines and pyridines have been important in the syntheses of compounds having interesting pharmacological properties. Therefore, we found of interest to synthesize chromenopyridines and ...
    • Araya Maturana, Ramiro; Heredia Moya, Jorge; Escobar, C. A.; Pérez, P. (SOCIEDAD CHILENA DE QUIMICA, 2004-03)
      The theoretical global and local electrophilicity patterns of substituted and chelated 4-oxo-4H-benzopyran-3-carbaldehydes (formylchromones) have been evaluated using the electrophilicity index proposed by Parr et al [J. ...
    • Fehlner, T. P.; Calvo Pérez, Víctor; Cen, W. (Elsevier Science Publ. B.V., 1993)
      The clusters of M2[O2CCCo3(CO)9]4-n[O2CR]n, where M is Cr, n= O; where M is Mo, n = 0,1, R is CH3; where M is W, n=0; exhibit allowed transitions with absorvance maxima that correlate with the lowest ionization energy of ...
    • Günther Sapunar, Germán; Lemp Miranda, Else; Zanocco Loyola, Antonio (SOCIEDAD CHILENA DE QUIMICA, 2000-12)
      Time resolved near IR luminescence detection of singlet oxygen, O-2((1)Delta (g)), and steady-state photolysis experiments were performed to study in detail limitations and approaches involved when 9,10-dimethylanthracene ...
    • De O. Costa, Cicero; De O. Costa, Erivaldo; Da R. Ferreira, Fabrícia; Da S. Viana, Luciana; Da Silva, Leonardo V.; De A. Dos Santos Silva, Francisco; De Abreu, Fabiane C.; Figueiredo, Isis M.; Pinho, Waldomiro; De S. Bento, Edson; Lemos, Telma L.G.; Pessoa, Otília D (2012)
      The formation of paramagnetic species from oncocalyxone A in aprotic medium was confirmed by performing in situ electrochemical-electron spin resonance (E-ESR) experiments. The high delocalization of the radical generated ...