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.
You know that tempeh is a fermented food, but what is fermentation exactly? The scientific meaning of fermentation is the energy-yielding anaerobic metabolism of a nutrients, such as sugars, without oxidation. Fermentation converts these nutrients mainly into lactic acid, acetic acid, and ethanol.These are fermentation end product of some microorganisms: In a broader meaning, fermentation refers to the growth of microorganisms on food.Here no distinction is made between aerobic (oxygen is used) and anaerobic (no oxygen is used) metabolism. We will here use this broader meaning of fermentation.n a broader meaning, fermentation refers to the growth of microorganisms on food. Here no distinction is made between aerobic (oxygen is used) and anaerobic (no oxygen is used) metabolism. We will here use this broader meaning of fermentation.