Now showing items 4761-4780 of 5098

    • Castañeda Magliona, Fernando; Zanocco Loyola, Antonio; Meléndrez Cancino, Mónica Ximena; Günther Sapunar, Germán; Lemp Miranda, Else (ELSEVIER SCIENCE SA, 2004-12-01)
      Three lipid-soluble furan derivatives, 2,5-disubstituted with different n-alkyl chains, and a terminal trimethylammonium group were obtained by reaction of a metalated monoalkylfuran with alkyl dihalides under conditions ...
    • Tapia, Cristián A.; Ormazabal, Víctor; Costa, Edda; Yazdani-Pedram Zobeiri, Mehrdad (TAYLOR & FRANCIS INC, 2007-06)
      The aim of this work was to develop prolonged diltiazem hydrochloride release matrices based on alginate-gelatin mixtures and establish the drug release mechanism. The erosion, swelling, and dissolution behavior of the ...
    • Romero, Nalda; Robert Canales, Paz; Masson Salaué, Lilia; Ortiz Viedma, Jaime; González, Karina; Tapia, Karla; Dobarganes, Carmen (ELSEVIER SCI LTD, 2007)
      The antioxidant effects of tocols (α-tocopherol and α-tocotrienol) and Rosa mosqueta shell extract added to antioxidant-stripped canola oil (TCO) were evaluated and compared with the non-stripped oil (CO) under the same ...
    • Venegas Yazigi, Diego; Cano, Joan; Ruiz, Eliseo; Alvarez, Santiago (ELSEVIER, 2006-10-01)
      Density functional theory (DFT) calculations on the tetranuclear Ni(II) complex [Ni-4(C5H11O3)(4) (CH3CN)(4)](NO3)(4)center dot 1.33NaNO(3), have been made in order to explain the exchange magnetic phenomenon. Two ferromagnetic ...
    • Venegas Yazigi, Diego; Cortés, Susana; Paredes García, Verónica; Peña, Octavio; Ibáñez, Andrés; Baggio, Ricardo; Spodine Spiridonova, Evgenia (PERGAMON-ELSEVIER SCIENCE LTD, 2006-07-10)
      A group of dinuclear copper(II) compounds containing the macrocyclic complexes Cu2L2+ (LH2 = C(24)H(2)sN(4)O(4): a ligand derived from the condensation of 4-methyl-2,6-diformylphenol with 1,3-diamine-2-propanol) have been ...
    • Ruiz, Inés; Jirón Aliste, Marcela; Pinilla, E.; Paulos, Claudio; Pezzani Valenzuela, Marcela; Rubio, Betzabé; Chávez, H.; Pineda López, Rafael; Mellado, Rose Marie (AMER ASSOC COLL PHARMACY, 2002)
      The study of Pharmacy at the University of Chile has been continuously adapting to the scientific developments and change in the practice of pharmacy. The University of Chile has considered, since 1997, the internship as ...
    • Eltit Ortega, José Miguel; García, Alejandra; Hidalgo Tapia, Jorge; Liberona Leppe, José; Chiong Lay, Mario; Lavandero González, Sergio; Maldonado Maldonado, Edio; Jaimovich Pérez, Enrique (AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC, 2006-04-28)
      Tetanic electrical stimulation of myotubes evokes a ryanodine receptor-related fast calcium signal, during the stimulation, followed by a phospholipase C/inositol 1,4,5-trisphosphate-dependent slow calcium signal few seconds ...
    • Ushak, S.; Spodine Spiridonova, Evgenia; Venegas Yazigi, Diego; Le Fur, Eric; Pivan, J. Y. (ELSEVIER, 2006-09-08)
      The hybrid organic/inorganic copper oxovanadium diphosphonates of formula [Cu(bipy)(VO2)(2)(O3PCH2PO3)H2O] 1, which crystallizes in the orthorhombic symmetry, and [Cu(bipy)(VO2)(O3P(CH2)(2)PO2OH)] (.) 1.5H(2)O 2, which ...
    • Greiner Gebauer, Monika Marcela; Cárdenas Muñoz, Sergio Patricio; Parra, C.; Bravo, Jaime F.; Avalos, Ana María; Paredes Vargas, Alfonso; Lara Peñaloza, Hernán; Fiedler Temer, Jenny (HUMANA PRESS INC, 2001-08)
      Morphological studies of granular neurons of the hippocampus have shown that adrenalectomy (ADX) induces the cell death of granular neurons, an effect prevented by corticosterone replacement. We addressed the hypothesis ...
    • Donoso, M. V.; Carvajal, A.; Paredes Vargas, Alfonso; Tomic, A.; Koenig, Cecilia S.; Huidobro Toro, Juan Pablo (ELSEVIER SCIENCE INC, 2002-09)
      Neuropeptide Y (NPY) and noradrenaline (NA) are co-transmitters at many sympathetic synapses, but it is not yet clear if their release is independently regulated. To address this question, we quantified the electrically ...
    • Paredes Vargas, Alfonso; Romero Osses, Carmen; Dissen, G. A.; DeChiara, T. M.; Reichardt, L.; Cornea, A.; Ojeda, Sergio R.; Xu, B. J. (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2004-06-01)
      Although it is well established that both follicular assembly and the initiation of follicle growth in the mammalian ovary occur independently of pituitary hormone support, the factors controlling these processes remain ...
    • Greiner Gebauer, Monika Marcela; Paredes Vargas, Alfonso; Araya, Verónica; Lara Peñaloza, Hernán (HUMANA PRESS INC, 2005-12)
      This article presents a review of the role of the sympathetic activity in ovarian pathologies affecting reproductive function. We provide a succinct outline of the findings of our group in this area. The participation of ...
    • Boric, M. P.; Figueroa, X. F.; Donoso, M. V.; Paredes Vargas, Alfonso; Poblete, I.; Huidobro Toro, Juan Pablo (AMER PHYSIOLOGICAL SOC, 1999-09)
      To evaluate whether sympathetic activity induces nitric oxide (NO) production, we perfused the rat arterial mesenteric bed and measured luminally accessible norepinephrine (NE), NO, and cGMP before, during, and after ...
    • Dissen, G. A.; Romero Osses, Carmen; Paredes Vargas, Alfonso; Ojeda, Sergio R. (WILEY-LISS, DIV JOHN WILEY & SONS INC, 2002-12-15)
      Substantial evidence now exists indicating that the neurotrophins, a family of growth factors required for the survival, development, and differentiation of various neuronal populations of the nervous system, are also ...
    • Romero Osses, Carmen; Paredes Vargas, Alfonso; Dissen, G. A.; Ojeda, Sergio R. (ENDOCRINE SOC, 2002-04)
      The neurotrophin nerve growth factor (NGF) and its two membrane-anchored receptors are expressed in the developing ovary before the organization of the first primordial follicles. In the absence of NGF, the growth of ...
    • Paredes Vargas, Alfonso; García Rudaz, C.; Kerr, B.; Tapia, V.; Dissen, G. A.; Costa, M. E.; Cornea, A.; Ojeda, Sergio R. (ENDOCRINE SOC, 2005-12)
      In the rat ovary, germ and somatic cells become organized into primordial follicles 48-72 h after birth. Although several genes have been implicated in the control of early follicular growth, less is known about the factors ...
    • Dissen, G. A.; Lara Peñaloza, Hernán; Leyton Canales, Víctor; Paredes Vargas, Alfonso; Hill, D. F.; Costa, M. E.; Martínez Serrano, A.; Ojeda, Sergio R. (ENDOCRINE SOC, 2000-03)
      A single injection of estradiol valerate induces a form of cystic ovary resembling some aspects of the human polycystic ovarian syndrome. Preceding the development of follicular cysts, there is an increase in intraovarian ...
    • Lara Peñaloza, Hernán; Dissen, G. A.; Leyton Canales, Víctor; Paredes Vargas, Alfonso; Fuenzalida Cruz, Héctor; Fiedler Temer, Jenny; Ojeda, Sergio R. (ENDOCRINE SOC, 2000-03)
      A form of polycystic ovary (PCO) resembling some aspects of the human PCO syndrome can be induced in rats by a single injection of estradiol valerate (EV). An increase in sympathetic outflow to the ovary precedes, by several ...
    • Jiménez T., Inés; Aracena Stiven, Paula; Letelier Muñoz, María Eugenia; Navarro, P.; Speisky Cosoy, Hernán (PERGAMON-ELSEVIER SCIENCE LTD, 2002-04)
      Metallothionein (MT) and reduced glutathione (GSH) play an important role in the intracellular handling of copper by preventing the generation and favouring the removal of copper-derived free radicals. The present study ...
    • Letelier Muñoz, María Eugenia; Izquierdo Lazo, Pamela Alejandra; Godoy Oviedo, Luis; Lepe Agrodnik, Ana María; Faúndez Cáceres, Mario Antonio (JOHN WILEY & SONS LTD, 2004-11)
      Toxic effects of several nitro-aryl drugs are attributed to the nitro-reduction that may be suffered in vivo, a reaction that may be catalysed by different reductases. One of these enzymes is NADPH-cytochrome P450 reductase, ...