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9月1日星期日
Environmental advantages of microbial flora
From the point of view of microbial flora , there are suitable wine microflora . Heart Wine production plant perennial food wine to keep cool and moist , and the fresh air, is a good variety of habitat for beneficial microorganisms . In order to build koji microorganisms inhabit the environment , surroundings regularly to spray a large music room of the old yeast rice , Calcium lactate environment flora advantage. Nearly 40 years, is constantly the production process, after long-term natural selection , domestication and preferably in the music room , plant , air, ground , tools and other places, especially the music room and pits formed a specific , suitable for concentrated heart liquor flavor microbial strains . On the walls of the brewing plant , screening produces fragrant Bacillus aroma yeast, mold and other bacteria , magnessium lactate and molds and other winemaking functions bacteria . Liquor brewing and liquor formation of flavor components are the result of microbial metabolism . Therefore , the heart of wine typical style formation benefited from this special natural environment.
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