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Fed-batch culture
Fed-batch culture is one of modes of culture of microorganisms or animal cells. It is also sometimes called Semi-batch culture.
== Introduction ==
Fed-batch culture is, in the broadest sense, defined as an operational technique in biotechnological processes where one or more nutrients (substrates) are fed (supplied) to the bioreactor during cultivation and in which the product(s) remain in the bioreactor until the end of the run.〔Tsuneo Yamanè, Shoichi Shimizu: Fed-batch Techniques in Microbial Processes. Advances in Biochem Eng./Biotechnol 1984, 30:147-194.〕 An alternative description of the method is that of a culture in which "a base medium supports initial cell culture and a feed medium is added to prevent nutrient depletion". It is also a type of semi-batch culture. In some cases, all the nutrients are fed into the bioreactor. The advantage of the fed-batch culture is that one can control concentration of fed-substrate in the culture liquid at arbitrarily desired levels (in many cases, at low levels).
Generally speaking, fed-batch culture is superior to conventional batch culture when controlling concentrations of a nutrient (or nutrients) affect the yield or productivity of the desired metabolite.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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