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  • 1995-1999  (2)
  • ANTIOXIDANTS  (1)
  • Computational Chemistry and Molecular Modeling  (1)
  • Analytical Chemistry and Spectroscopy
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Digestive diseases and sciences 43 (1998), S. 646-651 
    ISSN: 1573-2568
    Keywords: ANTIOXIDANTS ; INTESTINE ; SALMONELLA TYPHIMURIUM GLUTATHIONE
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The mucosal pathology of Salmonella typhimuriuminfection may in part be due to the excessive productionof reactive oxygen species (ROS). The influence of S.typhimurium infection on the intestinal mucosal antioxidant defense system was investigated. Weinjected ligated rat ileal loops with Salmonella liveculture or toxin. After 18 hr of infection, the animalswere killed and enterocytes isolated from the ileal loops. The enterocyte-reduced glutathione(GSH) content and activities of the enzymes superoxidedismutase (SOD), glutathione peroxidase (GSH-Px),catalase, glutathione-S-transferase (GST), glutathione reductase (GR), and glucose-6-phosphatedehydrogenase (G6PDH) were spectrophotometricallyestimated. The vitamin E and A contents were determinedby high-performance liquid chromatography (HPLC). Inboth the Salmonella live culture and toxin-treatedgroups, the enterocyte GSH and vitamin E contents andactivities of the enzymes SOD, GSH-Px, catalase, GR, andG6PDH were significantly decreased as compared to the control group. However there was asignificant increase in the enterocyte activity of GST.There was no change in the vitamin A content of theenterocytes. These findings might indicate a decreased endogenous intestinal protection against ROS inS. typhimurium-mediated infection, which couldcontribute to the pathogenesis of the disease.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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  • 2
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 55 (1995), S. 477-484 
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ab initio molecular orbital (MO) calculations with the 3-21G and 6-31G basis sets are carried out on a series of complexes of NH3 with Li+, C≡N-, LiCN, and its isomer LiNC. The BSSE-corrected interaction energies, geometrical parameters, internal force constants, and harmonic vibrational frequencies are evaluated for 15 species. Complexes with trifurcated (C3v) structures are calculated to be saddle points on the potential energy surfaces and have one imaginary frequency each. Calculated energies, geometrical parameters, internal force constants, and harmonic vibrational frequencies of the various species considered are discussed in terms of the nature of association of LiCN with ammonia. The vibrational frequencies of the relevant complexed species are compared with the experimental frequencies reported earlier for solutions of lithium cyanide in liquid ammonia. © 1995 John Wiley & Sons, Inc.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    Library Location Call Number Volume/Issue/Year Availability
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