The Use of Reconstituted Non-Fat Dry Milk Solids for Propagating Mother and Batch Starter Cultures

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Abstract
The use of milk reconstituted from spray, non-fat, dry milk solids produced lactic acid starter cultures more constant in activity from day to day than when selected whole milk was employed as the culture medium. Certain water supplies proved unsuitable for reconstituting milk for starter. The water, if other than distilled, should be tested to determine whether or not it affects activity of cultures. Spray, non-fat, dry milk solids varied in ability to provide a satisfactory culture medium for Streptococcus lactis starter cultures. Results indicated that individual barrels of milk powder should be tested to determine their suitability for starter milk. Methods have been outlined for testing suitability of water and non-fat dry milk solids for prepn. of starter milk. A method is also given for preparation of batch starter with reconstituted spray, non-fat,dry milk solids.

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