摘要：The Central Veterinary Laboratory, Weybridge, England, was requested by the WHO Expert Committee on Biological Standardization to obtain suitable material for an international reference preparation of hygromycin B and to arrange a collaborative assay. A batch of 150 g of a highly purified hygromycin B was assayed in eleven laboratories in nine countries against the hygromycin B standard of a commercial manufacturer. On the basis of the results obtained, the material has been established as the International Reference Preparation of Hygromycin B and the International Unit for Hygromycin B has been defined as the activity contained in 0.0008928 mg of the International Reference Preparation of Hygromycin B. Full text Full text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (891K), or click on a page image below to browse page by page. Links to PubMed are also available for Selected References . 933 934 935 936 937 938 939 940 941 942 943
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