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6日星期二
Lactic acid chloride enzymatic conversion
The University of Tokyo, Japan, Kawasaki and other studies of enzymatically catalyzed synthesis of lactic acid, respectively, from the stench A Single-saturated bacteria and Pseudomonas bacteria cells full extraction and purification of L-2-halo acid Lactic acid and DL-2 A halo acid dehalogenase, acting on a substrate 2-chloro-DL acid, L-lactic acid obtained a milk or D
Acids. L-2-halo acid dehalogenase catalyzed L-2-halo acid dehalogenation; while DL-2-halo acid Dehalogenases either L-2 a catalytic dehalogenation of halogenated acids, but also a 2-D catalytic Ethyl lactate of halogenated acids, in
Catalysis is the change in conformation can occur. Hummel enzymatic conversion of pyruvate and other people from the D-lactic acid ?
Dehydrogenase activity was the highest confusion bacteria Lactobacillus DSM 20196 to get D-lactate dehydrogenase,A non-optically active pyruvate as substrate to obtain D-lactic acid.
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