Abstract
The effects of poly (2-hydroxyethyl methacrylate) gels on the mutarotation rates of α- and β-D-glucose have been studied. Using polarimetric techniques, mutarotation rates in slurries of gels containing poly (2-hydroxy- ethyl methacrylate-co-4-vinyl pyridine) were found to be 15% higher than in similar tests performed with gels not containing 4-vinyl pyridine. Mutarotation rates in gels containing the 4-vinyl pyridine were the same as in the bulk aqueous phase of the system, while rates in gels without the 4-vinyl pyridine were essentially nil. The effect of the decreased mutarotation rate was experi- mentally observed using α-D-glucose as a reagent with glucose oxidase which had been immobilized by entrapment in similar gels. These results are interpreted as arising from the difference in the activity of water in poly (2-hydroxyethyl methacrylate) gels with and without 4-vinyl pyridine.
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