Shanghai Metro, China. The 468km network of the Shanghai Metro makes it the world's second longest. Shanghai Metro is the third rapid transit system in Mainland China, after Beijing and Tianjin. Shanghai Shentong Metro operates the network through its four subdivisions.
fermentation. n. 1. (Biochemistry) a chemical reaction in which a ferment causes an organic molecule to split into simpler substances, esp the anaerobic conversion of sugar to ethyl alcohol by yeast. Also called: ferment.
If the temperature is too cool, the fermentation will be sluggish, resulting in an opportunity for the growth of contaminants, such as wild yeast and bacteria. In terms of fermentation, lager yeasts are routinely fermented between 40â54 Â°F (4â12 ÂºC) while ale yeast is used from 55â70 Â°F (13â21 ÂºC). The optimal fermenting temperatures of yeast vary considerably. Some ale yeasts for example, do not perform well below 65 Â°F (18 ÂºC).