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Gelatin solution(26wt%) was mixed with GA solution (1wt%) with the gelatin/GA volume ratio 7.5/1.0 at 45 ¡æ for gelation in a polypropylene tube and allowed to react for 2min. In the case of albumin gel, 45wt% albumin solution was mixed with 10wt% GA solution with the albumin/GA volume ratio 4.0/1.0. After addition of 5mLPBS(-£©solution to the gel (1g) and incubation at 37¡æ for predetermined durations, the supernatant(extract) was collected and the same amount of new PBS(-) was added, followed by extraction. Release of the unreacted aldehyde from the gelatin gel to each of PBS(-)was determined with the MBTH method.
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