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  • Free radicals
  • Springer  (6)
  • Elsevier
  • Wiley
  • 1990-1994  (6)
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Publisher
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 16 (1994), S. 783-788 
    ISSN: 0392-6737
    Keywords: Free radicals ; Amorphous materials ; glasses ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary Linear and non-linear Electron Spin Resonance spectroscopies have been designed to study the decay of the orientation correlations on different time scales. The reorientation of radicals («spin probes») dissolved in host phases (in the present case a polymeric liquid crystal (PLC)) may be investigated in the time window 10−11–10−5 s. Evidence of the non-exponential regression of fluctuations is given. The temperature dependence of the correlation time of the spin probe orientation is discussed in the case of semi-crystalline PLCs and contrasted with the case of amorphous PLCs.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Il nuovo cimento della Società Italiana di Fisica 16 (1994), S. 1285-1289 
    ISSN: 0392-6737
    Keywords: Amorphous materials, glasses ; Free radicals ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We study the reorientation process of a paramagnetic radical dissolved in supercooledo-terphenyl around and belowT g via the Electron Spin Resonance spectroscopy. The experimental results are at variance with the hypothesis of diffusive reorientation of the radical. Instead, the ESR lineshapes are fairly well reproduced by assuming that the radical reorientates via large angular jumps with a width Δϕ=80° −5° +10° . The results are compared with previous2H NMR studies.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 16 (1994), S. 31-33 
    ISSN: 1573-739X
    Keywords: Cisplatin ; Doxorubicin ; Drug resistance ; Free radicals ; Glutathione ; Metabolic detoxication, drug ; Platinum-DNA adducts
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 13 (1991), S. 104-108 
    ISSN: 1573-739X
    Keywords: Alkylating agents ; Antineoplastic agents ; Bisaziridinylbenzoquinones ; DNA ; Free radicals ; Glutathione ; Oxidation—reduction ; Oxygen ; Clinical trials ; Enzymes ; Drug evaluation ; Rheumajecta® ; Rheumatoid arthritis ; Vasolastine®
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Pharmacy world & science 15 (1993), S. 146-150 
    ISSN: 1573-739X
    Keywords: Antioxidants ; Clinical trials ; Dyskinesia, drug-induced ; Free radicals ; Parkinson disease ; Pathology ; Vitamin E
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In this article the effect of vitamin E on two extrapyramidal disorders, tardive dyskinesia and Parkinson's disease, is reviewed. After a brief description of the symptoms, the current hypotheses for the pathogenesis of these diseases are described. A summary of the clinical research that has been done to establish the effectiveness of vitamin E is given. In tardive dyskinesia four clinical trials (double-blind, placebo-controlled) showed improvement in the symptoms with vitamin E in doses of up to 1,600 IU/day. Preliminary studies concerning Parkinson's disease suggested that vitamin E (2,000 IU/day) probably cannot prevent the development of the disease. It was suggested that vitamin E is able to slow the progression of the illness. The results from a large double-blind, placebocontrolled clinical trial, however, did not show any beneficial effect of vitamin E in Parkinson's disease.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-136X
    Keywords: Life span ; Free radicals ; Antioxidants ; Malondialdehyde ; Vertebrate lung
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract It has been proposed that antioxidants can be longevity determinants in animals. However, no comprehensive study has been conducted to try to relate free radicals with maximum life span. This study compares the lung tissue of various vertebrate species — amphibia, mammals and birds — showing very different and well known maximum life spans and life energy potentials. The lung antioxidant enzymes superoxide dismutase, catalase, Se-dependent and non-Se-dependent glutathione peroxidases, and glutathione reductase showed significantly negative correlations with maximum life span. The same was observed for the lung antioxidants, reduced glutathione and ascorbate. It is concluded that a generalized decrease in tissue antioxidant capacity is a characteristic of longevous species. It is suggested that a low rate of free radical recycling (free-radical generation and scavenging) can be an important factor involved in the evolution of high maximum animal longevities. A low free-radical production could be responsible for a low rate of damage at critical sites such as mitochondrial DNA.
    Type of Medium: Electronic Resource
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