In order to solve the problem whether to keep the hole and block the leakage or protect the permeability of the formation,we propose the use of such polymers as Na-CMC,guar gam and konjaku flour to develop the temporarily blocked drilling fluid combined with the chain scission and degradation mechanics in modern biology.
针对钻井工程中出现的护壁堵漏与保护地层渗透性的矛盾,提出了利用羧甲基纤维素钠、胍尔胶、魔芋等聚合物,并结合现代生物技术中聚合物的断链降解原理,开发出适合于石油、天然气、地下水等钻井领域的自动降解无伤害钻井液——暂堵型钻井液,与传统的暂堵剂不同,它在钻进完成后不需要采用解堵工艺,如压力解堵、酸化解堵、油溶解堵、破胶等,从根本上改进了解堵工艺;分析了暂堵型钻井液的基本原理和两种典型聚合物的酶降解原理,并介绍了室内的粘度实验、渗透性恢复测试实验和在甘肃张掖和广西柳州的现场试验;理论和实践均证明,暂堵型钻井液能自动降解,对产层无伤害,在进行有效护壁堵漏的同时,还能在可控制的时间内显著地恢复地层的渗透性,因此具有推广价值。
Some important microbial steroid biotransformations such as side chain cleavage and hydroxylation were reviewed, including their mechanism, development and applications.
对几种重要的甾体微生物转化反应如甾体边链降解、甾体羟基化反应的机理及其发展与应用作了概述 ;同时也介绍了固定化微生物细胞、非水溶液中酶催化反应及混合发酵等微生物转化技术在制药工业中的应
The mechanism of HP-β-CD acting on phytosterols side chain cleavage was preliminary investigated.
本文对羟丙基-β-环糊精(HP-β-CD)提高植物甾醇(PS)侧链降解反应效率的作用机理进行了初步研究。
Synthesis of Cleavable Multiblock Copolymer via Ring-Opening Metathesis Polymerization
烯烃易位聚合制备主链降解型多嵌段功能化聚合物
The correlation of the degradation parameter with some known soil properties was statistically analyzed.
结果表明地乐酚的降解主要是生物降解。
MICROBIAL DEGRADATION OF β-SITOSTEROL:PRODUCTION OF △~4-ANDROSTENE-3,17-DIONE
β-谷甾醇侧链的降解:Δ~4-雄甾烯-3,17-二酮的生成
Study on Lysosomes Degradation of Ricin A Chain;
溶酶体参与蓖麻毒素A链降解途径的研究
The Optimized Treatment of the Refractory Straight-chain Alkanes in the Groundwater
地下水中难降解直链烷烃治理方法的优化研究
Studies on Screening Microorganisms Degrading Linear Sodium Alkylbenzenesulphonate(LAS) and its Degrading Characteristics;
阴离子表面活性剂直链烷基苯磺酸钠（LAS）高效降解菌的筛选及其降解特性研究
Hydrolysis is one of the most important methods of tebufenozide degradation in the environment.
水解是虫酰肼进入环境后的主要降解方式之一。
For example, the production of short-chained fatty acids from fats renders butter rancid and unpleasant odors.
例如,脂肪降解产生的短链脂肪酸使奶油产生腐败难闻的气味。
The rate of chain-reaction degradation is retarded by the presence of small amounts of antioxidants.
这种链式降解反应的速率可通过加入少量抗氧剂而受到阻滞。
Advance in Degrading Side Chain of Sterols of Getting Androst-4-Ene-3,17-Dione by Microorganism
微生物降解甾醇侧链转化雄甾-4-烯-3,17-二酮的研究进展
Studies on the Degradation of Pseudomonas Aeruginosa Immobilized to LAS (Linear Alkyl Benzene Sulphonate) with Low Intensity Ultrasonic Irradiation;
低强度超声波干预固定化细胞降解直链十二烷基苯磺酸钠的研究
DNA Modification in Streptomyces Lividans 1326 and DNA Degradation in Mycobacterium Smegmatis mc～2155;
变铅青链霉菌DNA的修饰与耻垢分枝杆菌DNA的降解
Localization and Rudiment Studies of Biological Function of DNA Degradation Gene Cluster add from Streptomyces Avermitilis;
除虫链霉菌DNA降解基因簇add的定位及生物学功能的初探
Expermental Study on Streptomycin Combined Slow-releasing Degradable Menbrane to Prevent Tendon Adhesion;
肌腱损伤局部置入链霉素复合缓释降解膜的实验研究
A Research on Delaying the Muscular Dystrophy That the Implanting of Streptomycin Composite Degradation Membrane into the Local Muscle That Defects of Spinal Cord;
链霉素复合降解膜植入脊髓缺损局部延缓肌萎缩的研究
Gene Cloning and Characterization of the Xylanolytic Enzymes from Streptomyces spp.
链霉菌来源的木聚糖降解酶相关基因的克隆及酶学性质研究
Purification and Characterization of an ε-Poly-L-lysine-degrading Enzyme Isolated from Streptomyces diastatochromogenes TUST2
淀粉酶产色链霉菌TUST2中ε-聚赖氨酸降解酶的纯化和性质
CV can build intelligent link on the base of reference linking with subject resolve over DOI and URI.
受控语言在参考文献链接基础上提供主题解析以实现知识链接。
