1，关于多糖纯化：我采用的是先自来水后蒸馏水的方法进行透析。编辑问题：
It is interesting to note that you ran your dialysis in tap water then in distilled water. Research has shown that polysaccharides have a unique capability of absorbing compounds (organics, metal ions) from tap water. Did you notice any effect if the dialysis was only run in distilled water?

2，关于高分子粒度（particle size）的控制：怎样能够控制高分子粉末的粒度在50微米左右？是否需要特殊的工艺？


希望给点专业意见，不胜感激。：）
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