Browsing by Title Artículos de revistas

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    • Comportamiento de algunos parámetros de calibración de electrodos selectivos a nitrato, a diferentes ... 
      Arada Pérez, María de los Angeles; Yardani Pedram, Mehrdad (Asociación de Químicos e Ingenieros del Instituto Químico de Sarría, 2003)
      The statistical evaluation of seven ion selective chemical sensors (ISE) for nitrate ion determination, based on polymeric membranes on a conductive support, has been carried out in this work. This was donw in order to ...
    • Composición del aceite esencial de limón de pica (Citrus aurantifolia) por cromatografía gas líquido 
      Contreras Villacura, Elsa; Masson Salaué, Lilia; Fuentes T., R.; Abarca A., M. (Universidad de Santiago de Chile. Dirección de Investigaciones Científicas y Tecnológicas, 1980)
      Se analizó por cromatografía gas-líquido los componentes del aceite esencial de limón de "pica" (Citrus aurantifolia) y común (Citrus limonum). Se detectaron 33 componentes en el caso de limón de "pica" y 30 para el limón ...
    • Composición elemental de aerosoles sub-antárticos en función del tamaño de partícula. 
      Préndez Bolívar, María Margarita; Zolezzi Carvallo, Santiago (Instituto Antártico Chileno, 1982)
      La especial situación geográfica de la Antártica y sus características meteorológicas hacen que el estudio de sus aerosoles atmosféricos sea particularmente interesante. En este trabajo se ha estudiado la composición ...
    • Composición en ácidos grasos y proximal de siete especies de pescado de Isla de Pascua 
      Romero, Nalda; Robert Canales, Paz; Masson Salaué, Lilia; Pineda López, Rafael (Sociedad Latinoamericana de Nutrición, 2000)
      En el último tiempo se ha puesto un gran énfasis en el c.'<1udiode la presencia de ácidos grasas potiins3turados de Ja familia omega~3 en aJimentos de origen marino. debido a sus efectos beneficiosos descritos en relación ...
    • Composición química y valor calórico de los chocolates. Características físicas y químicas de la materia grasa. 
      Mella Rojas, María Angélica; Borguenson Gallardo, Ricardo Vicente; Masson Salaué, Lilia (Sociedad Chilena de Tecnología de Alimentos, 1987)
      Se analizan muestras de chocolates: con leche en barra, de fantasía en barra, en polvo amargo, en polvo dulce y coberturas de helados para determinar la calidad y cantidad de la materia grasa como también el valor calórico ...
    • Composition and biological effects of goldenberry byproducts: an overview 
      Nocetti, Diego; Núñez, Hipólito; Puente Díaz, Luis; Espinosa Escalona, Alejandra; Romero, Fernando (Wiley, 2020)
      Goldenberry is a wild fruit that has been widely used for centuries, mainly in folk medicine. Most studies of goldenberry have focused on the fruit, but new research has studied its byproducts, which were considered to ...
    • Computer assisted design of potentially active anti-trypanosomal compounds 
      Paulino, M.; Iribarne, F.; Hansz, M.; Vega, M.; Seoane, G.; Cerecetto, Hugo; Di Maio, R.; Caracelli, I.; Zukerman-Schpector, J.; Olea Azar, Claudio; Stoppani, A. O. M.; Berriman, M.; Fairlamb, A. H.; Tapia, O. (ELSEVIER SCIENCE BV, 2002-04-26)
      A computer assisted molecular modeling was used to design molecules having a shape complementary to the active site of glutathione reductase (GR) and trypanothione reductase (TR). The designed 5-nitro compound derivatives. ...
    • Concentrating n-3 fatty acids from crude and refined commercial salmon oil 
      Pando, María Elsa; Bravo, Beatriz; Berrios, Macarena; Galdames, Andrea; Rojas, Catalina; Romero, Nalda; Camilo, Conrado; Encina, Cristian; Rivera, Matías; Rodríguez, Alicia; Aubourg, Santiago (Institute of Agricultural and Food Information, 2014)
      The urea complexation was used to concentrate n-3 fatty acids (FA) from crude and refined commercial salmon oils. The experimental procedure included salmon oil saponification, free fatty acid (FFA) collection, formation ...
    • Concentration and fractionation of Cu, Cr, Ni and Zn in montmorillonitic and allophanic soils: Comparison ... 
      Schalscha B., Eduardo; Escudero, Paula; Ahumada Torres, Aída Inés de Lourdes (IST CHIMICA AGRARIA, UNIV PISA VIA S MICHELE DEGLI SCALZI, 1999-05)
      The content and the chemical forms of chromium, copper, nickel and zinc in allophanic and montmorillonitic soils, one of them irrigated exclusively with untreated sewage waters, were studied. To gain information about the ...
    • Concentration of Gamma-Linolenic and Stearidonic Acids as Free Fatty Acids and Ethyl Esters from Viper's ... 
      Rincón Cervera, Miguel Ángel; Galleguillos-Fernández, Raúl; González-Barriga, Valeria; Valenzuela, Rodrigo; Valenzuela Bonomo, Carlos (Wiley-VCH Verlag, 2018)
      © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim In this work, gamma-linolenic acid (GLA) and stearidonic acid (SDA) are successfully concentrated as free fatty acids (FFA) and ethyl esters (EE) using the urea complexation ...
    • Concholepas hemocyanin biosynthesis takes place in the hepatopancreas, with hemocytes being involved in its ... 
      Manubens, Augusto; Salazar, Fabián; Haussmann, Denise; Figueroa, Jaime; Del Campo, Miguel; Pinto, Jonathan Martínez; Huaquín, Laura; Venegas, Alejandro; Becker, María Inés (2010)
      Hemocyanins are copper-containing glycoproteins in some molluscs and arthropods, and their bestknown function is O2 transport. We studied the site of their biosynthesis in the gastropod Concholepas concholepas by using ...
    • A conditional tetracycline-regulated increase in gamma amino butyric acid production near luteinizing ... 
      Bilger, Marie; Heger, Sabine; Brann, Darrell W.; Paredes Vargas, Alfonso; Ojeda, Sergio R. (ENDOCRINE SOC, 2001-05)
      Gamma amino butyric acid (GABA) is the main inhibitory neuro-transmitter controlling LH-releasing hormone (LHRH) secretion in the mammalian hypothalamus. Whether alterations in GABA homeostasis within discrete regions of ...
    • Conformation of 4-thio-L-lyxono-1,4-lactone in solution and in the crystalline state 
      Varela, Oscar; Zunszain, Patricia A.; Cicero, Daniel O.; Baggio, Ricardo; Vega, Daniel R.; Garland, María Teresa (Elsevier Ltd, 1996)
      The conformation in 2H2O of 4-thio-L-lyxono-1,4-lactone (1) was studied by nuclear magnetic resonance spectroscopy, by means of homonuclear (J(1(H),1(H))) and heteronuclear (J(1(H),13(C))) coupling constants. The couplings ...
    • Conformational analysis of 3-triphenylphosphoranylidene-2,4-pentanedione by NMR spectroscopy and geometrical ... 
      Castañeda Magliona, Fernando; Recabarren Gajardo, Gonzalo Iván; Hu, J.; Gillitt, N. D.; Bunton, Clifford A. (TAYLOR & FRANCIS LTD, 2003-11)
      The diacyl ylide, 3-triphenylphosphoranylidene-2,4-pentanedione (2) can adopt conformations stabilized by ylidic resonance with both acyl oxygens syn- or with one oxygen syn- and the other anti- to cationoid phosphorus, ...
    • Conformational and physicochemical properties of quinoa proteins affected by different conditions of ... 
      Vera, A.; Valenzuela, M. A.; Yazdani-Pedram Zobeiri, Mehrdad; Tapia, C.; Abugoch James, Lilian (Elsevier, 2019)
      Quinoa proteins (QP) have promise as a potential source of novel food ingredients, and it is of great interest to know how high-intensity ultrasound (HIUS) treatments affect the properties of QP. This work aimed to study ...
    • Conformational constraint in ferroelectric liquid crystals incorporating a pyrrolidine-type ring: FLC ... 
      Ely, Fernando; Cristiano, Rodrigo; Longo, Ricardo; Vergara Toloza, Rafael; Soto Bustamante, Eduardo; Gallardo, Hugo (2007)
      Ferroelectric liquid crystals bearing a chiral pyrrolidine-type ring were prepared using (-)-(S)-malic acid as a building block. The compounds were characterized using the thermal analysis techniques of DSC and POM, ...
    • Conformational differences in stabilized diketo and diester phosphonium ylides in a solid and in solution 
      Castañeda Magliona, Fernando; Aliaga Silva, Christian Marcelo; Garland, María Teresa; Hu, J.; Gillitt, N. D.; Bunton, Clifford A. (TAYLOR & FRANCIS LTD, 2007-01)
      The diacyl ylid, 3-triphenylphosphoranylidene-2,4-pentanedione 2 can adopt conformations with one oxygen syn- and the other anti- to phosphorus 2a as in the crystal, or with both oxygens syn- to phosphorus 2b. In solution, ...
    • Conformational dynamics of substituted N-acetyl-N-phenylbenzylamines. H-1-DNMR and AM1-MO study 
      Weiss López, Boris; Jullian Matthaei, Carolina; Saitz Barría, Claudio; Pessoa Mahana, Hernán; Valderrama, J.; Araya Maturana, Ramiro (SOCIEDAD CHILENA DE QUIMICA, 2001-09)
      Activation parameters for the rotation around the methylene-nitrogen single bond found in a series of four 2,2'-disubstituted N-acetyl-N-phenylbenzylamines, dissolved in DMSO-d(6), were measured employing the temperature ...
    • Conformational studies on 2-guanidinylthiazole, famotidine and some analogues 
      Olea Azar, Claudio; Parra Mouchet, Julia (Elsevier, 1997)
      Conformational analysis of famotidine (FAMO) and some analogues have been performed using AM1 calculations. In addition, conformational analysis were done on the 2-guanidinylthiazole moiety in order to see the effect of ...
    • Conformations of monoylidic diester triphenylphosphonium ylides 
      Castañeda Magliona, Fernando; Silva, Paul; Acuña, Cristina; Garland, María Teresa; Bunton, Clifford A. (2013)
      In ylidic triphenylphosphonium carboxylic esters the ester oxygen can be oriented towards (syn) or away (anti) from phosphorus, but except for small ylidic ester groups, e.g., Me, the anti conformer is dominant. With ...