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7日星期三
anaerobic production of lactic acid
Organisms in anaerobic respiration, organic incomplete oxidation of pyruvate First, they produce alcohol in the absence of oxygen and Ethyl lactate . Generated is large, will be deposited in the body. General anaerobic respiration produces ethanol plants, such as rice, rice rot is caused by lack of oxygen because of alcoholism. And animals, such as the human anaerobic respiration to produce ferrous lactate. People in strenuous exercise enough to provide the energy needed for aerobic respiration, oxygen will produce lactic acid causes muscle soreness. Bath and massage can slow this situation.
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