A polyaniline / polyisoprene composite film with permselectivity was synthesized by electrochemical method for the first time , which can determine selectively h2o2 in the presence of electroactive interferent ascorbic acid 采用电化学方法首次制备了具有特殊渗透选择性的聚苯胺/聚异戊二烯复合膜，它能在抗坏血酸存在下让过氧化氢选择透过。
Rubber and rubber products - determination of the composition of vulcanizates and uncured compounds by thermogravimetry - butadiene , ethylene - propylene copolymer and terpolymer , isobutene - isoprene , isoprene and styrene - butadiene rubbers 橡胶和橡胶制品.用热解重量分析法测定硫化和未硫化化合物的成分.丁二烯乙烯丙烯共聚物和三元共聚物异丁烯异戊二烯异戊二烯和丁二烯橡胶
Rubber and rubber products - determination of the composition of vulcanizates and uncured compounds by thermogravimetry - part 1 : butadiene , ethylene - propylene copolymer and terpolymer , isobutene - isoprene , isoprene and styrene - butadiene rubbers 橡胶和橡胶制品.用热重分析法测定硫化和未硫化化合物的成分.第1部分:丁二烯乙烯-丙烯共聚物和三聚物异丁烯-异戊二烯异戊二烯和苯乙烯-丁二烯橡胶
It was confirmed that the key enzyme of coq10 synthesis is p - hydroxybenzoate polyprenyltransferase , encoded by gene ubia in e . coli and lacks specificity to the aggregation length of its substrate ( polyisoprenyl pyrophosphate ) . if gene ubia can be introduced into psb and is high expression in psb , a recombinant strain producing coq10 could be obtained . consequently , the productive cost will decrease sharply 业已证实coq _ ( 10 )生物合成的关键酶为对羟基苯甲酸聚异戊二烯焦磷酸转移酶(在大肠杆菌中该酶由ubia基因编码) ，该类酶对底物聚异戊二烯焦磷酸( ppp )的聚合长度并无特殊要求。
It was found that the composite film containing 28 . 6 % polyisoprene suited well for biosensor construction . the apparent michaelis constanst and activation energy for the immobilized glucose oxidase are 11 . 9 mm and 41 . 1 kj - mol " 1 , respectively . the biosensor response was influenced by ph value of determined solution , applied potential and operational temperature 研究发现，复合膜中聚异戊二烯含量28 . 6为传感器制作的最佳条件；固定化葡萄糖氧化酶的表观米氏常数为11 . 9mm ，酶催化反应的表观活化能为41 . 1kj ? mol ~ ( - 1 ) ；被测溶液的ph值、工作电位、使用温度等对葡萄糖传感器的响应有一定的影响。
The newly development of rubber industry in china was reviewed and the present situation through the export and import instance of natural or synthetic rubber was analyzed . summarizing the synthesis technology of isoprene monomer and isoprene rubber and we believe that china has abundant raw material and mature synthesis technology to develop rare earth isoprene rubber 论述了国内橡胶行业的发展现状,通过近年来我国合成橡胶与天然橡胶的进出口情况,分析了国内市场的发展趋势及存在的问题,并对国内外异戊二烯的单体生产技术和异戊橡胶的合成技术进行了总结,认为我国已经具备发展稀土异戊橡胶的原料及合成技术,具有广阔的发展前景。
