ISSN:
0025-116X
Schlagwort(e):
Chemistry
;
Polymer and Materials Science
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Physik
Notizen:
Rate and association constants (kf and K, respectively) for the addition of sulfite ion to three flavins (including isoalloxazines) and to four flavin-containing polymers were determined at 30°C in aqueous systems. The forward reaction rates for polymer-bound flavins at an ionic strength of μ = 0,18 mol/l were enhanced by factors of 15-37 and the association constants by factors of 7-19, compared with those of the corresponding monomeric flavins. A linear log kf - log K relationship was found for monomeric flavins. While the parameters for polymer-bound flavins deviated to the upper area by 0,5-1,0 log units. An increase in the salt concentration suppressed markedly the reaction parameters for polymer-bound flavins, and the log kf - logK plot at μ = 0,7 mol/l was involved in the linear relation for monomeric flavins.
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/macp.1978.021791105
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