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
Specializing in the production fermentation agent
In addition to a number of national research institutions to establish a microbial resources outside of the library, some large dairy industry, company or enterprise specializing in the production ferment lactic acid bacteria have established their own repository.Zinc lactate bacteria such as Danone company established preservation center, collected a total of about 3500 lactic acid bacteria, but currently its only hundreds of strains of lactic acid bacteria has been systematically studied, and lactic acid powder of the 50 used in the production. However, these strains untapped resource for the company's next one laid a solid foundation.
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