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  抗生素

  抗生素一般分為5 類: β- 內酰胺類抗生素(如青霉素) 、氨基酸糖苷類抗生素、大環內酯類抗生素(如紅霉素、螺旋霉素) 、四環內酯類抗生素(如四環素) 和多肽抗生素(如萬古霉素等) , 相對分子質量u=2308964132,2627655056&fm=23&gp=0.jpg在300~1 200 范圍內, 存在于液體中。從發酵液中提取的方法主要有吸附法、溶媒萃取法、離子交換法和沉淀法, 但這些工藝往往十分繁雜,所需時間長, 提取過程中需要消耗大量的原料, 能耗高, 抗生素在漫長的提取過程中易變性失活, 產品回收率低, 廢水污染嚴重且處理難度大, 得到的溶液中抗生素濃度往往很低。

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