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  • Physics  (3)
  • 2,3-bisphosphoglycerate  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Erythrocyte 2,3-bisphosphoglycerate concentrations and haemoglobin glycosylation in normoxic Type 1 (insulin-dependent) diabetes mellitus (1984)
    Springer
    Diabetologia 26 (1984), S. 389-391 
    Details
    ISSN: 1432-0428
    Schlagwort(e): Haemoglobin A1c ; Type 1 diabetes ; oxygen dissociation curve ; 2,3-bisphosphoglycerate ; p50
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Summary Increased erythrocyte 2,3-bisphosphoglycerate concentrations are associated with increased haemoglobin glycosylation in patients with Type 1 diabetes mellitus who have no cause or symptoms of hypoxic stress. This change in 2,3-bisphosphoglycerate metabolism is additional to its response to changes in circulating haemoglobin concentration. Statistical analysis of data showed that erythrocyte 2,3-bisphosphoglycerate concentration did not correlate with the absolute concentration of circulating haemoglobin A1c, but with the proportion of haemoglobin glycosylated. This finding is consistent with the hypothesis that it is changes in the position of the erythrocyte oxygen dissociation curve which modulate the increase in 2,3-bisphosphoglycerate synthesis upon haemoglobin A1c formation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00266043
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  • 2
    Digitale Medien
    Digitale Medien
    Transient decay studies of photophysical process in aromatic polymers. I. Multiexponential fluorescence decays in copolymers of 1-vinylnaphthalene and methyl methacrylate (1980)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 18 (1980), S. 2401-2413 
    Details
    ISSN: 0098-1273
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: The considerable potential of high resolution time-resolved spectroscopic data for copolymer systems in elucidation of the intramolecular photophysical processes which occur in polymer systems is illustrated. Such information can not be gleaned solely from studies of homopolymers. Kinetic data and time resolved fluorescence spectra of copolymers of 1-vinylnaphthalene and methyl methacrylate indicate that conventional kinetic schemes are inappropriate for the discription of excimer formation in 1-vinylnaphthalene polymers. Evidence is presented for the presence of an emitting species in addition to the expected monomeric and excimeric forms. The nature of this third species is discussed and photophysical kinetic schemes are proposed to describe intramolecular excimer formation in such systems. Kinetic data have been derived for the principle deactivation pathways through investigation of the observed fluorescence decays upon the intrachain concentration of aromatic species.
    Zusätzliches Material: 7 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1980.180181208
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  • 3
    Digitale Medien
    Digitale Medien
    Transient decay studies of photophysical processes in aromatic polymers. VI. Intramolecular excimer formation and dissociation in polystyrene and styrene-methyl methacrylate copolymers (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 20 (1982), S. 1759-1770 
    Details
    ISSN: 0098-1273
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: The time-resolved fluorescence behavior of polystyrene and a series of styrene-methyl methacrylate copolymers has been examined by using pulsed laser excitation. Although the photophysical characteristics of styrene- and naphthalene-containing polymers may be described by the same general kinetic scheme, some differences in the nature of the photophysical interactions are apparent. Umambiguous evidence for the occurrence of excimer dissociation into excited-state monomer in polymers incorporating styrene chromophores is presented.
    Zusätzliches Material: 5 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1982.180201001
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  • 4
    Digitale Medien
    Digitale Medien
    Transient decay studies of photophysical processes in aromatic polymers. V. Temperature dependence of excimer formation and dissociation in copolymers of 1-vinylnaphthalene and methyl methacrylate (1982)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 20 (1982), S. 411-421 
    Details
    ISSN: 0098-1273
    Schlagwort(e): Physics ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: The use of pulsed laser excitation upon a series of 1-vinylnaphthalene/methyl methacrylate co-polymers in which the intramolecular chromophore concentration is varied over a wide composition range has allowed the individual rate constants governing intramolecular excimer formation to be determined at various temperatures between 205 and 295 K. Triple exponential functions are necessary for adequate description of the photophysical kinetics over the entire temperature range. It is proposed that the kinetic and temperature behavior is consistent with a kinetic scheme involving two kinetically distinct monomeric species and an excimer in which energy may be transferred from the second monomer M*2 to the first monomer M*1 which can interact with the excimer by a conventional migration mechanism.
    Zusätzliches Material: 6 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1982.180200305
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