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- W1993281344 abstract "The effects on N2O and N2 gas on the radiation degradation yield of aqueous kappa (κ-) carrageenan were investigated. The Gd of solution saturated with N2O solution was expectedly much higher than in air (1.7 and 1.2 × 10−7 mol J−1). On the other hand, a lower Gd of 1.1 × 10−7 mol J−1 was obtained from κ-carrageenan solution saturated with N2. The rate constant of reaction of OH radicals with sonicated and irradiated κ-carrageenan were determined using e-beam pulse radiolysis. The rate constant of OH interaction with sonicated κ-carrageenan decreased with decreasing molecular weight. On the other hand, the OH interaction with irradiated κ-carrageenan decreased but did not vary significantly with decreasing molecular weight. Metal ion (Na+) induced conformational transition into helical form decreased the rate constant of OH reaction with κ-carrageenan. Likewise, the Gd in aqueous form was affected by the conformational state of κ-carrageenan. The helical conformation gave a lower Gd (7 × 10−8 mol J−1) than the coiled conformation (Gd = 1.2 × 10−7 mol J−1)." @default.
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- W1993281344 date "2010-05-01" @default.
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- W1993281344 title "Radiolysis studies of aqueous κ-carrageenan" @default.
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- W1993281344 doi "https://doi.org/10.1016/j.nimb.2010.02.006" @default.
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