http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Gopal Kedia,Pearl Passanha,Richard M. Dinsdale,Alan J. Guwy,Sandra R. Esteves 한국생물공학회 2014 Biotechnology and Bioprocess Engineering Vol.19 No.6
In this study volatile fatty acids (VFAs), whichare by-products from anaerobic fermentations, have beenused as the carbon source for polyhydroxyalkanoates(PHA) production by pure culture bacteria, Cupriavidusnecator. A number of factors influence the conversionefficiencies of VFAs to PHAs including the bacterialfeeding regimes. When VFA was supplied as a single feed,it was found that concentrations higher than 2% v/v VFAled to substrate inhibition and only 18% acetic acid and12% of butyric acid was converted into PHA. This resultedin less than 65% (w/w) of PHA content within themicrobial cells. Hence, the single VFA feeding strategywas found to provide low conversion rates of VFA intopolymer. An improved feeding strategy was found to bethe use of an automatic VFA feed based on the pH controlof the medium, which led to a more continuous feedingregime. The conversion of VFA to PHA was increased byalmost 2-fold to 33 and 22% for acetic acid and butyricacid respectively, with up to 75% (w/w) of PHA resultantwithin the microbial cells.