结论：溶解氧对青霉素发酵有重要影响。
Conclusion: Dissoluble oxygen have an important influence on penicillin fermentation.
前言：目的：确定适合青霉素发酵的溶解氧条件。
Objective: Decide on a suitable dissoluble oxygen condition of penicillin fermentation.
方法：通过调整氮源比较，考查其对青霉素发酵的影响。
Method: We investigated that affected to penicillin fermentation for increasing penicillin yield by a step.
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