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[求助] 一个英文实验方法,求解释!

Gelatin solution(26wt%) was mixed with GA solution (1wt%) with the gelatin/GA volume ratio 7.5/1.0 at 45 ℃ 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℃ 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.
我理解的是:
    26wt%的明胶溶液与1wt%的戊二醛溶液按体积比7.5::1.0在45℃条件下混合,塑料管内反应2min,制成1g胶;45wt%的牛血清白蛋白溶液与10wt%戊二醛溶液按体积比4.0:1.0按上述方法制成1g胶。
    然后在塑料管内加入5mlPBS,37℃培养预定时间(如1,2,3,4,5h)后,收集上清液,用MBTH方法测量5ml上清液中未反应醛的释放量。同时再在这个塑料管内加入5mlPBS,再培养预定时间后,收集上清液,MBTH方法测量5ml上清液中未反应醛的释放量。
    如果时间间隔均为1h,那个对于同1g胶来说,每个5mlPBS测得的醛含量为每1小时内的释放量,如果我想得到前2,3,4,5...小时内的醛释放量,就得把每个值相加,这样理解对吗?如果对的话,相加得到的值误差不会不太大?谢谢各位解答,不胜感激!
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