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calcium contamination
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  “calcium contamination”译为未确定词的双语例句
     A cement slurry system free of salt and calcium contamination
     XSM抗盐抗钙水泥浆体系研究
短句来源
     Laboratory evaluation and field tests were conducted, and results showed its advantages as effective fluid loss control, better thermal stability, salt tolerance and free of calcium contamination.
     经室内评价和现场应用表明,PSA-1降滤失剂热稳定性好,抗盐及抗高价金属离子污染能力强,是一种具有推广应用价值的钻井液处理剂。
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  相似匹配句对
     Fenoprofen Calcium
     苯氧布洛芬钙
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     About Calcium
     补钙切莫一“钙”而论
短句来源
     Vaccination contamination
     接种疫苗的污染
短句来源
     A cement slurry system free of salt and calcium contamination
     XSM抗盐抗钙水泥浆体系研究
短句来源
     ACN contamination could result in the disharmony of calcium homeostasis of liver in rats.
     结果认为丙烯腈能显著地抑制大鼠肝脏Ca2+-ATPase和激活磷酸化酶A的活性,可导致大鼠肝脏钙稳态的失调。
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  calcium contamination
These results suggest that the fast component that emerges after treatment with EGTA-AM is largely due to calcium contamination.
      
To address these issues and eliminate calcium contamination, we used EGTA in the external solution.
      
Part of the signal may arise from calcium contamination of the external solution.
      
All of the manipulations were carried out using disposable plasticware wherever possible to avoid calcium contamination.
      


In this work,arsenazo Ⅲ was purified,andcompared with the purest arsenazo Ⅲ of Sigma.These two reagents showed no difference in ab-sorption spectrum,calcium differential spectrumand calcium contamination.It indicates that thepurified arsenazo Ⅲ is suitable for the purposeof measuring intracellular calcium.

偶氮胂Ⅲ的萃取纯化方法。经纯化的产品可用于细胞内钙的分析。

The first port of this paper resumes the situation and tendency of main varieties of viscosity reducers for aqueous drilling fluids in later 1980s and points out the need in more effective chemicals for both viscosity reduction and clay inhibition. In the second port the synthesis and preliminary laboratory evaluation of cationic polymer DSAA are presented. This is a quartenary polymer of acrylic acid, acrylamide, sodium allylsulfonate, and diethyldiallyl amnonium chloride and is prepared through an aqueous...

The first port of this paper resumes the situation and tendency of main varieties of viscosity reducers for aqueous drilling fluids in later 1980s and points out the need in more effective chemicals for both viscosity reduction and clay inhibition. In the second port the synthesis and preliminary laboratory evaluation of cationic polymer DSAA are presented. This is a quartenary polymer of acrylic acid, acrylamide, sodium allylsulfonate, and diethyldiallyl amnonium chloride and is prepared through an aqueous solution polymerization initiated by redox system t-BuOOH-Na_2SO_3 at ambient temperatures. The polymer is tolerent to calcium contamination and thermally resistant to 120 ℃.The rate of viscosity reduction by 0.1% DSAA is 84% in a fresh and 60% in a 4 %-salt water muds.

本文前部分概述了80年代后期各种降粘剂的状况和发展趋势,指出需要研制兼具降粘和粘土抑制性的高性能降粘剂。后部分介绍了阳离子聚合物降粘剂DSAA的合成和室内初步评价结果。加量0.1%的DSAA降粘率达到84%(淡水泥浆)和60%(4%盐水泥浆),抗钙污染性能良好,可耐热120℃。

This paper proposes a method of synthesizing hydroxypropyl starch using starch and epoxypropane as crude materials, and alkali as accelerant. The synthesizing procedure of hydroxypropyl starch is described, and the synthetic hydroxypropyl starch is used to produce a fluid loss additive called QDF. QDF shows good fluid loss control and calcium contamination properties, and its usage in different kinds of drilling fluids are recommended based on tests results.

以淀粉和环氧丙烷为原料,以碱为催化剂,采用溶剂法合成了取代度为0.5—0.8、具有冷水溶胀性的羟丙基淀粉。考察了用作钻井液降滤失剂的羟丙基淀粉的合成条件,并以羟丙基淀粉为主剂复配得到了QDF降滤失剂,测定了加入QDF后的钻井液性能。实验结果表明,当环氧丙垸与淀粉的物质的量比为0.6:1.0—1.0:1.、溶剂与淀粉的质量比为2.0:1.0—3.0:1.0、催化剂用量为淀粉质量的0.05%—0.1%、温度为90—110℃时,可以得到用作钻井液降滤失剂的羟丙基淀粉。QDF在淡水钻井液、4%盐水钻井液和饱和盐水钻井液中的加量为0.7%时,滤失量可分别由21.6、100.0和118.0 ml,下降到6.8、7.1和8.6 mL;当QDF加量为0.7%,CaCl_2加量为5%时,淡水钻井液和4%盐水钻井液的滤失量均小于8mL,QDF表现出了优良的降滤失性能和抗盐性能。

 
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