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原乳의 細菌數에 의한 등급제 실시에 따른 乳質改善 효과
鄭忠一,姜國熙 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1
Bulk tank milk of 34 dairy farms in Pochun area, Kyunggido was tested to investigate how much the sanitary quality of raw milk could be improved. The results obtained were summarized as follows : 1. SPC of bulk tank milk of 34 dairy farms was greatly decreased from 85.7% to 18.9% in SPC above 2.1 X 10 exp (5) through an extension service of dairy farming technics and sanitary conditions. 2. The sanitary conditions of cluster and pail of milking machine, a source of bacterial contamination, were also greatly improved. Approximately 80% of the samples showed less than 100/ml in phychrotrophic bacterial count.
정충일,강현미 한국유가공기술과학회 1999 Journal of Dairy Science and Biotechnology (JMSB) Vol.17 No.2
Many dairy lactic acid bacteria used for manufacturing fermented milk products produce exopolysaccharides(EPS), which are excreted into the milk during fermentation, prevent syneresis, and ensure proper texture and body of the end product. Furthermore, it has been claimed that EPS isolated from lactic acid bacterial cultures have antitumor and cholesterol lowering activities. Stabilizers can adversely affect the true yoghurt taste, aroma, and mouthfeel. Therefore, an alternative way to improve yoghurt texture and stability is the use of EPS producing bacteria. Most of EPS functions are of a protective nature. The ability of microorganism to sur-round itself in a highly hydrated EPS layer may provide it with protection against desiccation and predation by protozoans. Also, native dextran is used potentially in many products of food and pharmaceutical industries for their reasons.