ISSN:
1750-3841
Source:
Blackwell Publishing Journal Backfiles 1879-2005
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
,
Process Engineering, Biotechnology, Nutrition Technology
Notes:
Growth stimulation of B. bifidum var. pennsylvanicus by filter- sterilized, unheated amino sugars was studied utilizing an ATCC medium 76 assay system. The order of stimulatory effect was N-acetylglu- cosamine (GlcNAc) 〉 N-acetylgalactosamine 〉 N-acetylmannosamine 〉 N-acetylneuraminic acid. When GlcNAc was heated at 121°C for 15, 30 and 45 min, depression of growth occurred and was directly related to the heat treatment applied. The presence of E. coli B organisms in the assay system did not influence the growth stimulatory effect of the amino sugars on B. bifidum Spent broth, prepared by growth of E. coli B in the assay medium followed by filter sterilization, was found to stimulate the subsequent growth of B. bifidum. The spent broth contained small quantities of amino sugars. E. coli B failed to grow in spent broth prepared from B. bifidum without pH adjustment. Growth of E. coli B was observed when this spent medium was neutralized and fortified with amino sugars, however, without any specific stimulatory pattern attributable to the type of amino sugar.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1111/j.1365-2621.1978.tb15282.x
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