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aref2 The essence of ultra-jet treatment (UJT) is a superpower shock dynamic effect on a liquid when braking a jet against a barrier. Whole raw milk with a weight fraction of fat l 1.5 and 3.2) was subjected to UJT and laser treatment (LT). After UJT and LT there was recorded a reduction of the somatic cells count in milk - from 500 thousand cells/cub.cm (initial quantity) to 300 thousand cells/cub.cm. The quantity of the mesophilic aerobic and facultative-anaerobic microorganisms became lower by two orders. After the treatment by the methods studied the coli-bacteria were absent in 1 cm3 of milk (before the treatment - in 0.001 cub. cm). The most optimal doses of the LT are considered to be 0.2-0.8 Mrad, that provide hundreds of thousands of times reduction of contamination and at the same time do not cause changes of taste, color and odor of the milk. Irradiation with the doses of 1.0-3 Mrad together with cooling at the temperature from the 0 to -2 deg C eliminates possibilities to develop in laser treated milk products for the pathogenic and toxicogenic microorganisms. The both methods are recognized as effective to reduce microbiological contamination of raw milk.

^TRN: 1509870
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