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.
This makes yeast popular for making bread, beer, and wine, by using either the carbon dioxide or the ethanol from fermentation. Lactic acid fermentation is another form of anaerobic fermentation, and is commonly used by muscle cells during times of stress when not enough oxygen is available.his makes yeast popular for making bread, beer, and wine, by using either the carbon dioxide or the ethanol from fermentation. Lactic acid fermentation is another form of anaerobic fermentation, and is commonly used by muscle cells during times of stress when not enough oxygen is available.