Pure lactic acid is a colorless liquid, is a colorless to pale yellow liquid. Odorless, hygroscopic. The relative density of 1.2060 (25/4 ℃). Melting point 18 ℃. Boiling point 122 ℃ (2kPa). Refractive index nD (20 ℃) ??1.4392. With water, ethanol, glycerin, insoluble in chloroform, carbon disulfide and petroleum ether. Heating under normal pressure, concentrated to 50%, part of the anhydride into milk, thus products often contain 10% -15% of the milk anhydride.
2013年8月21日星期三
Sukhothai two types of bacteria secrete bacteriocins
Sukhothai two types of bacteria secrete bacteriocins, a class is only the inhibition of the related bacteria, antibacterial spectrum is narrow, can hinder contact with pathogenic microorganisms intestinal cells; another with broad-spectrum antimicrobial activity against pathogens such as their : Zinc lactate congratulations coli and Pseudomonas has good inhibition. Therefore, the long-term lactic acid in the diet can reduce the breeding animals add enteritis and other diseases.
Lactic acid bacteria, bacteria growth and magnessium lactate animals produce beneficial nutrients, such as lactic acid, amino acids, vitamins, enzymes and antibacterial substances. In the feed additive, both antiseptic effect, increased feed flavor, promote aquaculture animal appetite.
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