1 me-dium. It was proved that the strains selected from gradient plate produced more Lincomycin (about 6%) than that one from normal plate.

• 实验证明,从洁霉素浓度梯度培养皿分离得到的菌株,它的洁霉素产生能力,比用常规方法从高氏1号琼脂平板得到的菌株的洁霉素产生能力高6%25左右。