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23日星期五
Lactic acid bacteria beverage is based on milk or milk powder as raw material
The lactic acid bacteria beverage is based on milk or milk powder as raw material, made from fermented lactic acid bacteria culture. But there are "bacteria" is certainly a role here? Market a lot of lactic acid bacteria beverage products Lactic acid fact, does not contain live bacteria, because according to whether after sterilization, is divided into active and non-active lactobacillus lactobacillus drink beverages. In fact, can play a significant role in human intestinal lactic acid bacteria beverages should be preferred. China Agricultural University, Food Science and magnessium lactate Engineering, doctoral tutor Professor Ren Fazheng also said: If we evaluated against a certain kind of bacteria, such as Lactobacillus casei, is certainly viable bacteria better than death.
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