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jp7635859

银虫 (小有名气)

[求助] 求助 谢谢 已有1人参与

外审专家意见:what do you mean by saying "exclusion limit"? Is this the same to "molecular weight cut-off? How do you achieve a molecular weight cut-off of a M.W. range between 7-14 kDa?   我做的是多糖,纯化时用了透析袋,具体为:The extracts were dissolved in distilled water and dialyzed (exclusion limit 7.0 kDa to14.0 kDa) for 24 h. The resulting dialyzed solution was concentrated and then lyophilized to obtain crude polysaccharides.  请高手帮我指点下问题出在哪里 怎么改?感激不尽。透析袋的用处到底是什么?谢谢、
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chaijudi

至尊木虫 (著名写手)

【答案】应助回帖

感谢参与,应助指数 +1
一般的透析袋只是截留大分子量的物质,不会出现截留范围的。比如5kd的,就是截留分子量大于5kd的
2楼2014-04-04 15:03:27
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