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22日星期四
Lactic acid drinks and yoghurt drinks
"Lactobacillus drinks" and "lactic acid drink" Although only a "fungus" the difference, but the essence is completely different. Mostly prepared from lactic acid drinks, non-fermented, Calcium lactate is no lactic acid bacteria, no
intestinal health effects, only as a beverage, but also recommended that children do not drink too much, so as not to affect the normal diet.
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 labeled in fact, does not contain live bacteria, because according to whether after sterilization, is divided into active and non-
active lactobacillus buffered lactic acid rink beverages. In fact, can play a significant role in human intestinal lactic acid bacteria beverages should be preferred. China Agricultural University, Food Science and Nutritional 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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