The preparation , modification , and cytocompatibility of poly - l - lactic acid ( plla ) scaffold for cartilage tissue engineering were studied 研究了聚- l -乳酸( plla )软骨组织工程支架的制备、改性及细胞相容性。
Its product was relatively pure l - lactic acid . according to the fungus taxonomy , it belongs to hyphomycetales , hyphomycetes , deuteromycotina , eumycota , fungi 据真菌分类学分类，该菌为真菌门、半知菌亚门、丝孢纲、丝孢目。
In this paper , a strain was selected with high esterase activity . its characteristics of production and enzymology and separation of l - lactic acid were investigated . through primary screening and rescreening , a fungus , f - 16 , with high esterase activity was selected 本文选育出了高活性酯酶产生菌株并对该菌体的产酶性质、酶学特性及酶对乳酸乙酯的手性拆分后产物分离作了一定的研究。
In order to separate the l - lactic acid and lactic acetate , the adsorption chromatography was utilized besides the extraction with ethyl ether . the operation conditions for resin a was initial 15 % lactic acid , ph 6 . 5 , temperature 30 , flow velocity 2 . 28 ml / min taking the condition of optimal enzymatic reaction , the amount of adsorption and natural hydrolyzation of lactic acetate into account 综合考虑酯酶的最适反应条件、树脂吸附量和乳酸乙酯的自发水解情况，确定酶解底物乳酸乙酯浓度为15 ，上柱条件为； ph值为6 . 5 ，温度为30 ，流速为2 . 28ml min 。
The major products includes 1 ) food additives : citric acid & its derivatives , l - lactic acid & its derivatives , msg , starch sugar etc ; 2 ) feed additives : lysine & its salts , corn gluten powder etc ; 3 ) bio - energy : fuel ethanol , bio - diesel etc ; 4 ) biochemical products range : bio - ethylene & its derivatives , poly lactic acid ( pla ) bio - degradable plastics , poly lactic acid polymer fiber fabrics etc 主要产品有柠檬酸及其盐类、 l -乳酸及其衍生物、味精、淀粉糖等食品添加剂；赖氨酸及其盐类、玉米蛋白粉、氨基酸蛋白粉等饲料添加剂；燃料乙醇、生物柴油等生物能源产品；生物乙烯及其衍生物、聚乳酸生物可降解塑料、聚乳酸聚酯纤维布料、无毒绿色溶剂、无毒增塑剂等生物化工系列产品。
