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  • Biochemistry and Biotechnology  (3)
  • Aspirin central action  (1)
  • 1
    Digitale Medien
    Digitale Medien
    Aspirin analgesia evaluated by event-related potentials in man: Possible central action in brain (1980)
    Springer
    Experimental brain research 39 (1980), S. 359-364 
    Details
    ISSN: 1432-1106
    Schlagwort(e): Pain ; Brain-evoked potentials ; Aspirin central action
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary The mechanism of aspirin analgesia is still unclear, but it is generally assumed that aspirin exerts its analgesic effect mainly on peripheral nociceptors. In this study, we demonstrate possible brain effects of 975 mg aspirin in man. When brain electrical potentials evoked by painful electrical tooth shocks were examined, aspirin was observed to significantly reduce the amplitude of the late waveform components, but it did not affect the earlier components. Since our earlier findings suggest that early waveform components reflect the energy transmission and the late components manifest the brain activities in an individual's perception of painful information, we postulate that aspirin may act centrally in pain processing.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00239300
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  • 2
    Digitale Medien
    Digitale Medien
    Potentiometric method for subatrate analysis using immobilized NAD+-dependent oxidoreductase enzymes (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 21 (1979), S. 1905-1915 
    Details
    ISSN: 0006-3592
    Schlagwort(e): Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Two coenzyme-dependent oxidoreductases, glucose dehydrogenase and alcohol dehydrogenase, were immobilized in polyacrylamide gel over a platinum grid matrix and used as enzyme electrodes to measure their substrate concentrations in buffered aqueous solutions. The immobilized enzymes were used to oxidize their substrates in the presence of NAD+. Ferricyanide was used as the redox mediator and electroactive specific. The determinations of glucose and ethenol were utilized to demonstrate and evaluate the performance of the system. The described methodology should be readily applicable to the analysis of numerous other substrates of coenzyme-dependent oxidoreductases.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bit.260211103
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  • 3
    Digitale Medien
    Digitale Medien
    Potentiometric quantitation of glycerol using immobilized glycerol dehydrogenase (1982)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 24 (1982), S. 971-975 
    Details
    ISSN: 0006-3592
    Schlagwort(e): Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Glycerol dehydrogenase was immobilized in polyacrylamide gel layered over a small platinum screen and used to catalyze the oxidation of glycerol. In the presence of NAD+ and potassium ferricyanide, the coupling reaction generated a measurable electrical potential which was found to be Nernstian with respect to the glycerol concentration range of 10-4M to 10-1M. The reproducibility of the measurement and the optimal conditions for glycerol determination were described.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bit.260240416
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  • 4
    Digitale Medien
    Digitale Medien
    Electrochemical evaluation of lactate dehydrogenase immobilized in polyacrylamide gels (1977)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 19 (1977), S. 1785-1792 
    Details
    ISSN: 0006-3592
    Schlagwort(e): Chemistry ; Biochemistry and Biotechnology
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Biologie , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: Lactate dehydrogenase (EC 1.1.1.27) has been immobilized in polyacrylamide gels over a platinum grid matrix. The immobilized enzyme is used to oxidize L-lactate in the presence of nicotinamide adenine dinucleotide (NAD+) and femcyanide. The NADH produced is then chemically oxidized back to NAD+by ferricyanide. The coupled reduction of ferricyanide ions to ferrocyanide ions results in a measurable electrochemical potential. This measurable zero-current potential is found to be Nernstian in nature and directly proportional to the logarithm values of L-Iactate concentration over the range of 2 × 10-5to 5 × 10-2M. The results indicate that immobilized lactate dehydrogenase can be incorporated into a system to detect L-Lactate acid in aqueous solutions.
    Zusätzliches Material: 3 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/bit.260191205
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