Many natural and semisynthetic variants have since been produced.
许多天然和半合成的青霉素从此也出现了。
In particular, a semisynthetic medium in the invention is used for to ferment the strain to obtain higher sugar yield.
特别是利用本发明中半合成培养基发酵该菌株可得到较高的产糖量。
Early antibiotics were natural microbial products, But chemists have modified the structures of many to produce semisynthetic and even wholly synthetic ones.
早期的抗生素是由细菌自然生成的产物，化学家改变许多结构产生出半合成或完全合成的抗生素。
A semisynthetic derivative of penicillin that is effective in the treatment of infections caused by certain susceptible strains of Gram-negative bacteria, such as Pseudomonas and Proteus.
盘尼西林的半合成衍生物，在治疗由革兰氏阴性细菌的某些过敏性菌系，如假单胞菌和变形杆菌引起的感染方面有疗效。
A semisynthetic derivative of penicillin that is effective in the treatment of infections caused by certain susceptible strains of Gram-negative bacteria, such as Pseudomonas and Proteus.
盘尼西林的半合成衍生物，在治疗由革兰氏阴性细菌的某些过敏性菌系，如假单胞菌和变形杆菌引起的感染方面有疗效。
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