Hengshun chemical industry is a modern enterprise which is the subordinate cooperation of anhuibaofeng group , mainly produces and develops fine chemicals . the company was founded in 1997 . at present , our main products are low - carbon fatty acid n - valeric acid , n - caproic acid , oenanthic acid , flavor series etc 恒顺化工厂是宝丰集团下属的一家以生产开发精细化工产品为主的现代型企业，具有强大的技术开发能力与丰富的生产经验，同时也拥有先进的生产与检测设备
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The synthesis of poly ( - hydroxybutyrate - co - - hydroxyvalerate ) by the strain g - iiiy from different precusor was studied . it was found that the strain g - iiiy could accumulate phbv with sucrose as carbon source and propionic acid or valeric acid as precursor . in 2l self - controlled fermentor , the dry cell weight , phbv concentration and phbv content reached 35 . 8g ? l - 1 , 22 . 6g ? l - 1 and 38 . 4 % respectively in the case of fermentation for 42 hours and the propionic acid as precursor 研究了添加不同前体物， g - y菌株生产聚-羟基丁酸和聚-羟基戊酸共聚物( phbv )的发酵条件，结果表明，此菌株能以丙酸或戊酸为前体，在蔗糖为碳源的条件下合成phbv共聚物；在2l发酵罐中，以丙酸为前体，发酵16小时开始流加丙酸，根据发酵液ph值变化控制丙酸流加量，发酵42小时，细胞干重、 phbv产量和含量分别达到35 . 8g / l ， 22 . 6g / l ， 63 . 13 。
