在大多数情况下青霉素是首先抗菌素。
目的研究不同温度和相对湿度条件下青霉素钾降解的动力学规律。
Objective To perform a kinetic analysis and formulation of the degradation of penicillin potassium in the solid phase at different temperature and relative humidity.
在使用新抗生素的情况下，再感染可能比使用青霉素或红霉素的情况更少见。
Reinfection will probably be less common in cases where the new antibiotic is prescribed than in cases where either penicillin or erythromycin is prescribed.
在青霉素g的情况下，发酵完成200小时后，细胞的质量是由过滤分离。
In the case of penicillin G, the fermentation is finished after 200 hours, and the cell mass is separated by filtration.
在实验条件下曾用过青霉素、氯霉素、四环素和其它各种抗菌素（和或不和链霉素连用），得到某种程度成功。
Penicillin, chlorampheicol, tetracycline, and various other antibiotics with or without streptomycin have also been needed with some degree of success under experimental conditions.
结果：三种药物在治疗下呼吸道感染时，疗效相同，青霉素的成本最低。
Results:Three drugs in the treatment of lower respiratory trace infection, while cost of penicillin was the lowest.
结果：三种药物在治疗下呼吸道感染时，疗效相同，青霉素的成本最低。
Results:Three drugs in the treatment of lower respiratory trace infection, while cost of penicillin was the lowest.
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