Abstract: A syrup from starch is prepared by glucosidase which is fermentation product from our strains. The product syrup contins 60 % isomaltooligosaccharides. The ability of the syrup and other biological material to promote growth of Bifidobacterium adolescentis was tested in milk solidifying. Supplements include: carbohydrate, extract of fungi and β-carotene.Extract of fungi is the best promoter for milk - solidifying.galactose,raffinose and melezitose also have effect to promote milk - solidifying. The syrup,especially the purified syrup,has obvious effect to decrease the time of milk - solidifying. The results of growth-promoting test show the same effect that the syrup is able to promote the growth of Bifidobacterium adolescentis.

Key words: Enzyme Oligosaccharides syrup Bifidobacterium Growth-promoting