The invention relates to animal feed supplements containing antibiotic trans-BM123. Such supplements may be economically obtained by adding to a fermentation whole harvest mash containing antibiotic trans-BM123, or to a filtered fermentation broth containing antibiotic BM123, at a suitable acid pH, a complexing agent selected from synthetic tanning agents, alkali metal alkyl sulfates and dioctyl sulfosuccinate salts, whereby to precipitate out a complex of the antibiotic with said complexing agent; and recovering the precipitated complex. These complexes aid in increasing the growth rate and feed efficiency when fed to arm animals, either alone or in combination with carriers.
本发明涉及含有反式 BM123 抗生素的动物饲料补充剂。在适当的酸性 pH 值下,向含有抗生素 trans-BM123 的发酵全收醪或含有抗生素 BM123 的过滤发酵液中加入选自合成鞣剂、碱
金属烷基
硫酸盐和
磺基琥珀酸二辛酯盐的络合剂,从而沉淀出抗生素与所述络合剂的络合物,并回收沉淀的络合物,可以经济地获得这种补充剂。这些复合物在单独或与载体结合喂养臂部动物时,有助于提高生长速度和饲料效率。