Now showing items 1324-1343 of 2543

    • Kainate, N-methylaspartate and other excitatory amino acids increase calcium influx into rat brain cortex cells in vitro 

      Berdichevsky, Elisa; Riveros, Nora; Sánchez-Armáss, Sergio; Orrego, Fernando (1983)
      Kainate (0.62-5 mM) was found to increase the initial rate of influx of 45Ca and of 22Na into the non-inulin space of rat thin brain cortex slices incubated in vitro, and to shorten the equilibration time for both these ...
    • Ketanserin: Polarographic Behaviour And Its Determination In Pharmaceutical Forms 

      Squella Serrano, Juan; Lemus,; Núñez Vergara, Luis (1995)
      Electrochemical reduction of Ketanserin was studied at different pH and concentrations using polarography and cyclic voltammetry. Ketanserin exhibits two differential pulse polarographic peaks at the dropping mercury ...
    • Ketorolac tromethamine: An experimental study of its analgesic effects in the rat 

      Bustamante, Diego; Paeile, Carlos (1993)
      1. 1. The formalin test and R-III nociceptive electromyographic reflex were used to determine the origin of analgesia induced by ketorolac tromethamine (KT) in rats. 2. 2. The effects of KT and morphine were compared after ...
    • Kidney drug metabolizing activities in streptozotocin diabetic rats 

      Del Villar, Eugenia; Gaule, Carlos; Vega, Patricio (1995)
      1. 1. Streptozotocin-induced diabetes produced significant changes on the drug metabolizing enzyme machinery of rat kidney microsomes. 2. 2. It reduced the cytochrome P-450 content by 30%, this effect being reversed by ...
    • Kinetic and in situ FTIR study of CO methanation on a Rh/Al 

      Escobar, Mauricio; Gracia, Francisco; Karelovic, Alejandro; Jiménez, Romel (Royal Society of Chemistry, 2015)
      © The Royal Society of Chemistry 2015.Carbon monoxide hydrogenation was studied over a γ-alumina-supported 1 wt% Rh catalyst by means of kinetic and in situ infrared measurements. The study was carried out at 200-300 °C, ...
    • A kinetic study of the reaction between 2-p-methoxyphenyl-4-phenyl-2-oxazolin-5-one and 2,2,6,6-tetramethyl-1-piperidinyl-N-oxide 

      Zanocco Loyola, Antonio; Cañete Molina, Alvaro Félix; Meléndez, M. X. (SOCIEDAD CHILENA DE QUIMICA, 2000-03)
      The reaction between 2-p-methoxyphenyl-4-phenyl-2-oxazolin-5-one and 2,2,6,6-tetramethyl-1-piperidinyl-N-oxide (TEMPO) in benzene as the solvent generates quantitatively 4,4'-bis-[2-p-methoxyphenyl-4-phenyl-2-oxazolin-5-one]. ...
    • A kinetic study of the reaction between boldine and singlet oxygen [O2(1Äg)] 

      Zanocco Loyola, Antonio; Lemp Miranda, Else; Günther Sapunar, Germán (1997)
      The sensitized photo-oxidation of boldine and its permethylated derivative, glaucine, has been studied in several solvents using steady-state kinetic methods. Values of kB, the total rate constant for the reaction between ...
    • Kinetics and mechanism of St I modification by peroxyl radicals 

      Campos, A. M.; Lissi Gervaso, Eduardo A.; Vergara, C.; Lanio, M. E.; Alvarez, C.; Pazos, I.; Morera, V.; García, Y.; Martinez, D. (1999)
      St I is a toxin present in the Caribbean Sea anemone Stichodactyla helianthus which is highly hemolytic in the nanomolar concentration range. Exposure of the toxin to free radicals produced in the pyrolysis of 2,2'- ...
    • Kinetics and mechanism of st i modification by peroxyl radicals 

      Campos, A. M.; Lissi Gervaso, Eduardo A.; Vergara, C.; Lanio, M. E.; Alvarez, C.; Pazos, I.; Morera, V.; Garcia, Y.; Martinez, D. (1999)
      St I is a toxin present in the Caribbean Sea anemone Stichodactyla helianthus which is highly hemolytic in the nanomolar concentration range. Exposure of the toxin to free radicals produced in the pyrolysis of 2,2′ ...
    • Kinetics and Mechanism of the Photosensitized Oxidation of Furosemide 

      Zanocco Loyola, Antonio; Günther Sapunar, Germán; Fuente, J. R. de la; Lemp Miranda, Else; Pizarro U., N. (1998)
      Detection of O,('A,) phosphorescence emission, A,,,, = 1270 nm, following laser excitation and steady-state competitive methods was employed to measure total rate constants, k,, for the reactions of the diuretic furosemide, ...
    • Kinetics and photophysical behavior of the P,N-Re-I complex [P,N-{(C6H5)(2)(C5H4N)P}Re(CO)(3)(O-O3SCF3)]: a directly coordinated (and labile) triflate 

      Prado, Gaspar; Ibañez, María Belén; Acosta, Alison; Chamorro, Eduardo; Hermosilla Ibañez, Patricio; Günther Sapunar, Germán; Pizarro, Nancy; Vega, Andrés (Elsevier, 2017)
      The reaction of [P,N-{(C6H5)(2)(C5H4N)P}Re(CO)(3)Br] (RePNBr) with silver triflate leads to the complex [P,N-{(C6H5)(2)(C5H4N)P}Re(CO)(3)(O-CF3SO3)] (RePNTfO) with moderate yield. This new P,N-Re-I triflate compound contains ...
    • Kinetics and photophysical behavior of the P,N-ReI complex [P,N-{(C6H5)2(C5H4N)P}Re(CO)3(O-O3SCF3)]: A directly coordinated (and labile) triflate 

      Prado, Gaspar; Ibañez, María Belén; Acosta, Alison; Chamorro, Eduardo; Hermosilla-Ibáñez, Patricio; Günther Sapunar, Germán; Pizarro, Nancy; Vega, Andrés (Elsevier Ltd, 2017)
      © 2017 Elsevier Ltd The reaction of [P,N-{(C6H5)2(C5H4N)P}Re(CO)3Br] (RePNBr) with silver triflate leads to the complex [P,N-{(C6H5)2(C5H4N)P}Re(CO)3(O-CF3SO3)] (RePNTfO) with moderate yield. This new P,N-ReI triflate ...
    • Kisspeptin is involved in ovarian follicular development during aging in rats 

      Fernandois, D.; Na, E.; Cuevas, F.; Cruz, G.; Lara Peñaloza, Hernán; Paredes Vargas, Alfonso (Bioscientifica, 2016)
      We have previously reported that kisspeptin (KP) may be under the control of the sympathetic innervation of the ovary. Considering that the sympathetic activity of the ovary increases with aging, it is possible that ...
    • Kisspeptin level in the aging ovary is regulated by the sympathetic nervous system 

      Fernandois, Daniela; Cruz, Gonzalo; Na, Eun Kyung; Lara, Hernán E.; Paredes, Alfonso H. (BioScientifica Ltd., 2017)
      © 2017 Society for Endocrinology. Previous work has demonstrated that the increase in the activity of sympathetic nerves, which occurs during the subfertility period in female rats, causes an increase in follicular cyst ...
    • Knots can impair protein degradation by ATP-dependent proteases 

      San Martín, Álvaro; Rodriguez Aliaga, Piere; Molina, José Alejandro; Martin, Andreas; Bustamante, Carlos; Baez Larach, Mauricio Andrés (National Academy of Sciences, 2017)
      ATP-dependent proteases translocate proteins through a narrow pore for their controlled destruction. However, how a protein substrate containing a knotted topology affects this process remains unknown. Here, we characterized ...
    • Kupffer cell function in thyroid hormone-induced liver oxidative stress in the rat 

      Tapia Opazo, Gladys; Pepper, Inés; Smok Sahid, Gladys; Videla Cabrera, Luis (1997)
    • La actividad de metaloproteinasa-9 se asocia al estrés oxidativo en el síndrome coronario agudo 

      Bittner, Alex; Castro Gálvez, Pablo; Pérez, Osvaldo; Corbalán, Ramón; Alcaíno Olivares, Hernán Alejandro; Troncoso Cotal, Rodrigo Hernán; Chiong Lay, Mario; Díaz Araya, Guillermo; Vicencio, José Miguel; Moraga, Francisco; Zanolli, Diego; Winter, José L.; Zamorano, Juan J.; Lavandero González, Sergio (Sociedad Chilena de Cardiología y Cirugía Cardiovascular, 2006)
      La metaloproteinasa (MMPs) son enzimas proteolíticas que participan en la inestabilidad de la placa aterosclerótica. En cultivos celulares, la actividad de metaloproteinasas-2 y 9 (MMP-2 y MMP-9) aumenta en presencia de ...
    • La computación: un desafío actual 

      Chávez, H. (Colegio de Químicos Farmacéuticos de Chile (A:G:), 1985)
      Es cada vez más evidente que la informática (manejo de información) y los computadores (procesadores de información), están cambiando nuestro sistema de vida. Por ahora podemos decir que el computador nos ofrece las ...
    • La constitución íntima de la materia. 

      Chávez, H. (Colegio de Químicos Farmacéuticos de Chile, 1980)
      La materia viva nos permite fijar un marco de referencia desde el punto de vista de las dimensiones. Las células y bacterias tienen tamaños que varían entre 0,2 y 10 micrones; los componentes celulares y los virus entre ...
    • la crisis de identidad profesional del farmacéutico en América Latina 

      Arancibia, Aquiles (Organización de Farmacéuticos Ibero-Latinoamericanos, 1990)
      Se describe el impacto de la revolución industrial en el ejercicio de la profesión farmacéutica la cual viene también condicionada por la formación académica adquirida. Se revisa criticamente el contenido de los planes ...