麥迪霉素 化學藥品說明書麥迪霉素片麥迪霉素膠囊
1)將麥迪霉素發(fā)酵液先調(diào)至酸性,用陶瓷膜過濾器過濾,過濾完成后,用1?2倍體積的pH已調(diào)至4.0?5.0的純化水溶液頂水,全收集濾過液; 2)將上述濾液調(diào)至堿性,加入乙酸丁酯萃取,乙酸丁酯的體積為濾液體積10%?15%; 3)將上述萃取液在酸溶液中轉(zhuǎn)相; 4)通過堿性溶液將轉(zhuǎn)相液pH調(diào)至8.0?8.5,加入為轉(zhuǎn)相液體積10 %?15 %的乙酸丁酯45?50°C的條件下萃取,得到萃取液后,再在常溫下逐漸滴加pH為6.0?8.0的純化水至有大量晶體析出; 5)晶體用離心機分離后,用潮晶質(zhì)量1?2倍體積50 %濃度的乙酸丁酯溶液洗滌晶體,干燥得到麥迪霉素成品。
Antibacterial
Midecamycin inhibits the majority of streptococci , staphylococci , and strains of Haemophilus and Listeria at concentrations of less than 3.1 μg/mL. Midecamycin is a 16-membered macrolide. Midecamycin is a new macrolide antibiotic, which is produced by Streptomyces mycarofaciens .