ESR investigations on lyophilized blood: mixtures with ascorbic acid.
نویسنده
چکیده
The main contribution to ESR spectra of lyophilized tissues of plant or animal origin usually is given by an anisotropic singlet, which is known to be caused at least in the majority of cases by the adsorption of an ascorbyl radical. Model systems have been investigated in order to discuss experimental parameters, which influence these spectra qualitatively and quantitatively.
منابع مشابه
On the possible involvement of ascorbic acid and copper proteins in leukemia. III. ESR investigations on the interaction between ascorbic acid and some transition metal ions.
The interaction between lyophilized samples of ascorbic acid and Cu2+, Fe3+ or Mn2+ has been investigated by means of ESR spectroscopy. All of the three transition metal ions form complexes with vitamin C, but only in the case of Cu2+ and Fe3+ the interaction results in a reduction of the metal ions. Cu2+ and ascorbic acid seem to form 2 : 1 complexes with an equilibrium constant of about K = 1...
متن کاملOn the possible involvement of ascorbic acid and copper proteins in leukemia. IV. ESR investigations on the interaction between ascorbic acid and some copper proteins.
The interaction between lyophilized samples of ascorbic acid and some copper proteins (ceruloplasmin, cytochrome-c-oxidase, ascorbate-oxidase) has been investigated by means of ESR spectroscopy. The spectra obtained are identical to the one obtained with leukemic blood. The consequences of this for the molecular events occurring in cancer are discussed. The model proposed can explain the experi...
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عنوان ژورنال:
- Zeitschrift fur Naturforschung. Section C, Biosciences
دوره 39 1-2 شماره
صفحات -
تاریخ انتشار 1984