Repositorio Académico de la Universidad de Chile: Recent submissions

Now showing items 43481-43500 of 101544

    • Influence of burrow acoustics on sound reception by frogs Eupsophus (Leptodactylidae) 
      Penna Varela, Mario; Solís Muñoz, Rigoberto (Academic Press, 1996)
      The effect of burrow acoustics on the reception of sounds by a leptodactylid frog, Eupsophus emiliopugini, from Southern Chile was investigated. Burrows occupied by E. emiliopugini males amplified vocalizations produced ...
    • Anxiety and hostility in written verbal samples of male and female subjects: A content analytic study 
      Sanfuentes, María Teresa; Larragitibel, Marcela; Schiattino, Irene; Lolas Stepke, Fernando (1996)
      Nonclinical populations of male and female subjects of middle socioeconomic level and different age ranges were assessed by means of the content analysis method developed by Gottschalk and associates. Verbal samples consisted ...
    • Interleukin 1 and tumor necrosis factor in obese alcoholics compared with normal-weight patients 
      Bunout Barnett, Daniel; Muñoz, Carlos; López, Marcelo; Maza Cave, María Pía de la; Schlesinger, Liana; Hirsch Birn, Sandra; Pettermann, Margarita (American Society for Nutrition, 1996)
      We performed a liver biopsy and measured plasma concentrations of interleukin 1β (IL-1β) and tumor necrosis factor α (TNF-α), and spontaneous and lipopolysaccharide-stimulated in vitro monocyte production of IL-1β and TNF-α ...
    • Altered maternal psychological profile as health risk factor in poor urban infants 
      Araya, M.; Espinoza, J.; Zegers, B.; Cruchet, S.; Brunser, O.; Humphreys, D.; Fernandez, C. L. (1996)
      To test the hypothesis that the increased health risk of children selected by a previously calculated and validated predictive model is associated with some maternal psychological characteristics, the universe of 107 mothers ...
    • Calcium and gadolinium ions stimulate the GTPase activity of purified chicken brain tubulin through a ... 
      Soto, Claudio; Rodríguez, Patricio H.; Monasterio Opazo, Octavio (1996)
      Ca2+ and Gd3+ stimulated the GTPase activity of chicken brain tubulin 13- and 26-fold, respectively. Mg2+, Tb3+, and Na+ had no effect. This GTPase activity showed a saturation behavior with Ca2+ and Gd3+ with a maximal ...
    • Dissociation of hypoxia-induced chemosensory responses and catecholamine efflux in cat carotid body superfused ... 
      Iturriaga, R.; Alcayaga Urbina, Julio; Zapata, P. (Blackwell Publishing Ltd, 1996)
      1. To examine the correlation between chemosensory response and dopamine release induced by hypoxic stimulation, we studied carotid bodies excised from anaesthetized cats. 2. The carotid bodies with their carotid (sinus) ...
    • Biochemical aspects of cellular antioxidant systems 
      Fernández Arancibia, Virginia; Videla Cabrera, Luis (1996)
      Aerobic life is characterized by a steady generation of reactive oxygen species balanced by a similar rate of their consumption by antioxidants. To maintain homeostasis, there is a requirement for the continuous regeneration ...
    • Zinc transport in mammalian cells 
      Reyes, Juan G. (American Physiological Society, 1996)
      The importance of zinc in cell physiology is related mainly to its intracellular involvement in enzyme catalysis, protein structure, protein- protein interactions, and protein-oligonucleotide interactions. The mechanisms ...
    • Studies related to progesterone-induced hamster sperm acrosome reaction 
      Llanos Silva, Miguel; Anabalón, Mireya C. (1996)
      Experiments were designed to characterize the effect of progesterone on the hamster sperm acrosome reaction (AR). Progesterone stimulated exocytosis of previously capacitated spermatozoa in a dose-dependent manner. ...
    • Cardiovascular responses to graded degrees of hypoxaemia in the llama fetus. 
      Llanos,; Riquelme,; Moraga,; Cabello,; Parer, (1995)
      The fetal llama exposed to an intense degree of hypoxaemia did not increase cerebral blood flow, but showed a marked peripheral vasoconstriction. The same cardiovascular response is observed in fetal sheep submitted to a ...
    • Neuronal changes induced by chronic toluene exposure in the cat 
      Saavedra Saavedra, Iván; De Marinis,; Palestini, (1996)
      Chronic toluene inhalation provokes significant deleterious neurological effects in young glue sniffers and exposed workers. We have developed a chronic toluene inhalation model in the cat to address this issue. Neuronal ...
    • Karyotype variability in Trypanosoma rangeli 
      Henriksson, J.; Solari Illescas, Aldo; Rydåker, M.; Sousa, O. E.; Pettersson, U. (Cambridge University Press, 1996)
      The molecular karyotypes of several different protozoan parasites show high intra-species variation, including different kinetoplastids such as Trypanosoma brucei, Trypanosoma cruzi and Leishmania ssp. In this study, the ...
    • Glutathione and trypanothione in several strains of Trypanosoma cruzi: Effect of drugs 
      Repetto Scaramelli, Yolanda; Opazo, Eduardo; Maya Arango, Juan; Agosin, Moises; Morello Casté, Antonio (Elsevier Inc., 1996)
      Glutathione (GSH), trypanothione (T(SH)2) and glutathionyl spermidine (GSH-SP) concentrations were determined in the Tulahuen and LQ strains and the DM 28c clone of Trypanosoma cruzi. The concentrations of GSH, T(SH)2 and ...
    • Neurite outgrowth through lesions of neonatal opossum spinal cord in culture 
      Varga, Z. M.; Fernandez, J.; Blackshaw, S.; Martin, A. R.; Muller, K. J.; Adams, W. B.; Nicholls, J. G. (1996)
      The aim of these experiments was to analyze neurite outgrowth during regeneration of opossum spinal cord isolated from Monodelphis domestica and maintained in culture for 3-5 days. Lesions were made by crushing with forceps. ...
    • Effect of constant light on fetal and maternal prolactin rhythms in sheep 
      Parraguez Gamboa, Víctor; Valenzuela, Guillermo J.; Vergara, Marcela; Ducsay, Charles A.; Yellon, Steven M.; Serón Ferré, María (Endocrine Society, 1996)
      A 24-h rhythm of plasma PRL is present in fetal sheep. This rhythm is synchronized to an environmental clue (zeitgeber). We determined whether the light-dark cycle (L:D) is a zeitgeber for the fetal PRL rhythm and, if ...
    • Tubulin domains for the interaction of microtubule associated protein DMAP-85 from Drosophila melanogaster 
      Henríquez, Juan P.; Cambiazo Ayala, Verónica; Maccioni Baraona, Ricardo (1996)
      The interaction of microtubule associated proteins (MAPs) with the microtubule system has been characterized in depth in neuronal cells from various mammalian species. These proteins interact with well-defined domains ...
    • The casein kinase 1α gene of Drosophila melanogaster is developmentally regulated and the kinase activity ... 
      Santos, João A.; Logarinho, Elsa; Tapia, Claudio; Allende, Catherine C.; Allende, Jorge E.; Sunkel, Claudio E. (1996)
      We report the molecular cloning and characterisation of the first CK1 (casein kinase) gene of Drosophila melanogaster (dmCK1). The protein sequence (DMCK1) shares significant homology with other mammalian CK1 protein kinases ...
    • Obesity as a protective factor for postmenopausal osteoporosis 
      Albala Brevis, Cecilia; Yáñez, M.; Devoto, Enzo; Sostin, C.; Zeballos, L.; Santos, J. L. (1996)
      Background: Obesity is considered a protective factor for osteoporosis improving bone mass and maintaining higher levels of estrogen during menopause. Objective: To determine the association of obesity with bone mineral ...
    • Developmental changes and differential regulation by testosterone and estradiol of growth hormone receptor ... 
      Yu, Yu M.; Domené, Horacio M.; Sztein, Jorge; Counts, Debra R.; Cassorla Goluboff, Fernando (BioScientifica Ltd., 1996)
      To investigate the effects of testosterone and estradiol (E2) on growth hormone receptor (GH-R) gene expression, we measured GH-R mRNA levels in relation to the changes of sex steroid concentrations in the normal male ...
    • Fluconazole in treatment of urinary candidiasis. Experience with 24 patients Fluconazol en el tratamiento ... 
      Thompson,; Pino,; Castrillón,; Schenone,; del Canto, (1995)
      Since fluconazole achieves high urine concentrations, we assessed its usefulness in the treatment of urinary candidiasis. We studied 24 patients (8 male) aged 23 to 97 years old, that presented pyuria with a negative urine ...