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compound log
相关语句
  相似匹配句对
     Compound Words of log2 in Shui Language
     水语loη~2构成的复合词
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     Compound Encryption
     复合加密法
短句来源
     On the Compound Matrices
     复合矩阵
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     Log is necessary.
     记录日志是项目开发必不可少的部分.
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     The pilot's Log
     飞行员日志
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The formation constants of ternary mixed ligand complex compounds (log K_(MAB)~(MA) formed from 1, 10-phenanthroline (A), N-(para-substituted phenyl)glycines, p-RC_6H_4-NHCH_2COOH (B, p-RPhG, R=CH_3O, CH_3, H, Cl) with copper (II), nickel(II), cobalt(H) and zinc(II) were determined by pH method at 25℃ in 30% (volume) ethanol solution in presence of 0.1M NaClO_4. It was found that some linear free energy relationships exist between the stability of M(U)-phen-p-RPhG ternary complex compounds...

The formation constants of ternary mixed ligand complex compounds (log K_(MAB)~(MA) formed from 1, 10-phenanthroline (A), N-(para-substituted phenyl)glycines, p-RC_6H_4-NHCH_2COOH (B, p-RPhG, R=CH_3O, CH_3, H, Cl) with copper (II), nickel(II), cobalt(H) and zinc(II) were determined by pH method at 25℃ in 30% (volume) ethanol solution in presence of 0.1M NaClO_4. It was found that some linear free energy relationships exist between the stability of M(U)-phen-p-RPhG ternary complex compounds and the base strengths of the ligands p-RPhG, conforming to the equation log K_(MAB)~(MA)=apK_b+C. The factors influencing the stability of the ternary complex compounds have been discussed. The enhancement of stability of ternary complex compounds was explained by the formation of π backbonding between metal ion and the ligand 1, 10-phenanthroline. In contrast to the binary system, the ternary Ni(II) and Zn(H) complexes showed higher stability which phenomenon might be accounted for by the formation of π back bonding and by intramolecular ligand-ligand interaction, possibly aromatic stacking.

应用pH法,在25.0±0.1℃,0.1M NaClO_4,30%(V/V)乙醇水溶液中,测定了以邻菲罗啉(phen)为第一配体(A),N-(对位取代苯基)氨基乙酸(p-RphG;R=CH_3O,CH_3,H,Cl:G=NHCH_2COOH)为第二配体(B)的Cu(Ⅱ),Ni(Ⅱ),Co(II),Zn(Ⅱ)三元配合物的生成常数1ogK_(MAB)~(MA).结果表明,三元配合物的稳定性与第二配体的酸碱强度之间存在着直线自由能关系,即logK_(MAB)~(MA)=apK_B+C.文章讨论了影响三元配合物稳定性的各种因素.三元配合物稳定性的增加可以用金属离子与phen之间形成π反馈键来解释.与二元体系比较,Ni(Ⅱ)和Zn(Ⅱ)的三元配合物稳定性增长更大.此现象可以用π反馈键的生成以及分子内配体的芳环之间的重叠来解释.

The DFT-B3LYP method, with the basis set 6-311G**, was employed to calculate the molecular geometries and electronic structures of 30 nitroaromatics. EHOMO, ELUMO, ENHOMO, ENLUMO, ?E, ET, QN O2, QC -NO2, QC-X, μ and V were selected as structural descriptors. According to the type and number of substitu- ents, the acute toxicity (-log IC50) of such nitroaromatics to Tetrahymena pyriformis along with hydropho- bicity quantified by the 1-octanol/water partition coefficient (log Kow) and the above eleven...

The DFT-B3LYP method, with the basis set 6-311G**, was employed to calculate the molecular geometries and electronic structures of 30 nitroaromatics. EHOMO, ELUMO, ENHOMO, ENLUMO, ?E, ET, QN O2, QC -NO2, QC-X, μ and V were selected as structural descriptors. According to the type and number of substitu- ents, the acute toxicity (-log IC50) of such nitroaromatics to Tetrahymena pyriformis along with hydropho- bicity quantified by the 1-octanol/water partition coefficient (log Kow) and the above eleven structural pa- rameters, was used to establish the quantitative structure-activity relationships (QSARs). The results indicate that the frontier orbital energies have important contributions to the toxicity of those nitroaromatics, and the electronic transfer interactions between the chemicals and biological molecules are the chiefly toxic actions of the nitroaromatics to the Tetrahymena pyriformis. For mononitro derivatives, their toxicities were corre- lated to log Kow too. The existence of halogen substituent may enhance the toxicities of such nitroaromatics. A highly predictive model was obtained for all objective compounds: -log IC50=18.037+10.446QN O2 -41.323?E-20.471ENLUMO+24.989ENHOMO with n=30, R=0.962, SE=0.185, F=78.640, Sig.=0.000.

用30种硝基芳烃化合物DFT-B3LYP/6-311G全优化计算结构参数:最高占有和最低未占分子轨道能级(EHOMO和ELUMO)、次最高占有和次最低未占分子轨道能级(ENHOMO和ENLUMO)、前线轨道能级差(?E=ELUMO-EHOMO)、分子的总能量(ET)、硝基和硝基碳上净电荷(QNO2和QC-NO2)、与卤素相连碳原子上的净电荷(QC-X)、分子偶极矩(μ)和分子体积(V),结合文献中的疏水性参数(logKow),按取代基类型和数目分类进行其对梨形四膜虫急性毒性(-logIC50)的定量构效关系(QSARs)研究.结果表明,前线轨道能级对硝基芳烃毒性作用有重要贡献,硝基芳烃对梨形四膜虫的毒性作用主要以与生物分子发生电子转移等化学反应为主,单硝基芳烃的毒性作用还与疏水性有关.卤素的存在增加了硝基芳烃化合物的毒性,卤素易被亲核取代.对30种标题物作多元线性回归,所得模型(-logIC50=18.037+10.446QNO2-41.323?E-20.471ENLUMO+24.989ENHOMO,n=30,R=0.962,SE=0.185,F=78.640,Sig.=0.000)具有较高毒性预测作用.

In view of the complex lithology of volcanic rocks, the identification and evaluation on gas and water layers in deep zone in northern Songliao Basin, Daqing Oilfield Co. Ltd. enlarges the development and application of compound log data and develops newmethod for the identification and evaluation on gas and water layers of deep zone through the establishment of evaluation chart for thequick judgment on physical properties of reservoirs, the parameter evaluation of reservoir and the establishment of evaluation...

In view of the complex lithology of volcanic rocks, the identification and evaluation on gas and water layers in deep zone in northern Songliao Basin, Daqing Oilfield Co. Ltd. enlarges the development and application of compound log data and develops newmethod for the identification and evaluation on gas and water layers of deep zone through the establishment of evaluation chart for thequick judgment on physical properties of reservoirs, the parameter evaluation of reservoir and the establishment of evaluation on gas andwater zone layers , which has obtained remarkable achievements in practical application. Accurate evaluation is timely provided for thehigh-production gas wells, such as Xushen-1 well, Weishen-5 well, Xushen-6 well and Xushen-601 well, etc. It is favorable for DaqingOilfield to make new breakthrough in deep gas exploration and meets the demand of complex geological exploration.

针对松辽盆地北部深层火山岩岩性复杂、气水层识别及评价难题,大庆油田加大了综合录井资料的开发应用力度,通过对储层物性好差程度的快速判断、储层评价参数的求取和气水层评价图版的建立,提出了深层气水层识别与评价新方法,在实际应用中见到了明显的效果,及时准确地评价了徐深1、卫深5、徐深6、徐深601等井的高产气层,为大庆深层气勘探取得新突破发挥了重要作用,较好地适应了复杂地区天然气勘探的需求。

 
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