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选择性比
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  selectivity ratio
     By Sketchy Method Alternately(SMA) rate constant of oil and fat hydrogenation reaction was calculated,and furthermore Selectivity Ratio(SR) of linoleate and linolenate was calculated respectively in the paper.
     提出迭代作图法,用以计算油脂氢化反应速率常数,进而计算三烯酸(酯)、二烯酸(酯)的选择性比(SR)。
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  “选择性比”译为未确定词的双语例句
     These results provided the evidence that Pt/WZr H β catalysts were not the simple mixture of Pt/WO x ZrO 2 and Pt/H β .
     Pt/WZr Hβ上的n C7转化率及异构化选择性比Pt/WZr Pt/Hβ均高 ,说明Pt/WZr Hβ并非是Pt/WOx ZrO2 和Pt/Hβ的简单加合。
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     ,the resistance to the action of S (n(S)=3×10 -6 ) of CIM-6 catalyst was 1.6 times as high as that of SP-7 catalyst,and the selectivity of CIM-6 catalyst was better than that of SP-7 catalyst.
     2 CIM - 6的抗硫能力 (n(S) =3× 10 - 6 )是SP - 7的1 6倍。 3 CIM - 6的选择性比SP - 7略好
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     The reactivity of Pt/WZr Pt/H β catalyst was much lower than that of either Pt/WO x ZrO 2 or Pt/H β catalysts, its isomerization selectivity was at the middle level, which was remarkably lower than that of Pt/WZr H β catalysts.
     Pt/WZr Pt/Hβ上的n C7转化率比Pt/WOx ZrO2 和Pt/Hβ均明显下降 ,但异构化选择性比Pt/WOx ZrO2 低 ,而比Pt/Hβ显著提高。
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     L-1 at 24h, and 21.07 g. L-1 and 72.70 g. L-1 at 48h after feeding in choice and non-choice tests.
     48h后分别为21.07 g·L~(-1)和72.70 g·L~(-1),选择性比非选择性拒食活性更强。
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     Selectivity of GS-08M catalyst was enhanced about 1 percent higher than that of GS-08 by adding some of new selectivity-promoting additives and optimization of preparation technique.
     通过引入新的选择性调变剂和优化制备工艺,GS-08M催化剂的选择性比GS-08催化剂提高近1个百分点。
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  相似匹配句对
     SELECTIVE FLOCCULATION
     选择性絮凝作用
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     Selectivity of erosion
     侵蚀的选择性
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     In this paper,the writer proves the existence theorem of Nash-Mequilibrium points under the weaker conditions than D.
     本文在 D.
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     V. C higher than families G.
     V.C家系G.
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     VARIATIONS OF THE SEX-RATIO AND DIFFERENTIAL MORTALITY IN THE GOLDFISH,CARASSIUS AURATUS
     鲫鱼Carassius auratus性的变异和选择性死亡
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  selectivity ratio
The best ligand (9, sigma-1 Ki = 0.56 nM, selectivity ratio >amp;gt;1000) was obtained with an azepine side-chain.
      
The selectivity ratio was better for the CP1 and CP2 strains as compared to control.
      
In the XD80EP stage using xylanase extract from CP1 with a pulp consistency of 8 to 15%, the Kappa number was not changed, but the viscosity, brightness, and selectivity ratio were improved proportional to the rise in consistency and delignification.
      
The 5-HT2C selectivity ratio [Kd(5-HT2A)/Kd(5-HT2C)] of the antagonists was directly proportional (r=+0.86,P>amp;lt;0.01) to maximal percent inhibition of the mCPP stimulus.
      
The DA/5-HT selectivity ratio was found to be a better predictor of self-administration behavior than affinity at the DA transporter alone.
      
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GDX-102 is a non-polar porous bead, copoly-merized from ethylvinyl benzene and divinylben-zene. After oxidation-modification, the vinyl groups on GDX-102 are decreased, while the carbonyl group and carbonyl ester group are increased. So the GDX-102 bead is modified into a polar stationary phase, and its polarity is strengthened with the raising oxidation temperature. Under the best oxidation-modification condition, the oxidative-modified GDX-102 possesses of higher selectivity in separating a mixture of hydrocarbon...

GDX-102 is a non-polar porous bead, copoly-merized from ethylvinyl benzene and divinylben-zene. After oxidation-modification, the vinyl groups on GDX-102 are decreased, while the carbonyl group and carbonyl ester group are increased. So the GDX-102 bead is modified into a polar stationary phase, and its polarity is strengthened with the raising oxidation temperature. Under the best oxidation-modification condition, the oxidative-modified GDX-102 possesses of higher selectivity in separating a mixture of hydrocarbon alcohol, aldehyde, ketone, ester, acid etc., and its column efficiency is greatly increased, i.e. 1.3 times for ethyl acetate, 2 times for alcohol and acetic acid, 2.3 times for acetone, and 2.5 times for propylaldehyde. Generally, the column effi-ciency of the oxidative-modified GDX-102 is 2-4 times higher than the polar polymeric porous bead GDX-401,-501 which is synthesized from polar comonomers, and the selectivity is also higher than the latter. Oxidative-modified GDX-102 has been used in the direct gas-chroma-tograpb.ic separation of the waste gas from paraffin oxidation. Good results in selective separation of low boiling compounds, such as hydrocarbons, alcohols, aldehydes, ketones, esters, acids, etc. was obtained.

GDX—102氧化改质后,乙烯基减少.羰基和羧酸酯基增加,成为多官能团极性高分子多孔小球。最佳改质条件下的产品.对烃、醇、醛、酮、酯、酸等多系混合物的分离选择性比改质前明显变好,也比GDX—101,301,401好;柱效是改质前的数倍(丙醛是2.5倍,丙酮是2.3倍,乙醇和乙酸是2倍,乙酸乙酯是1.3倍),是GDX-301,401,501的2—4倍(含氧化合物;对庚烷,是GDX—501的15倍)。它适用于低沸点烃、醇、醛、酮、酯、酸等同系或多系混合物的分析。用于石蜡氧化尾气的气相色谱分析得到了比较满意的结果。

Dehydrogenation of ethylbenzene to styrene using a mixed type catalyst was described. The selectivity and activity of the mixed catalyst were highter than those of single type catalysts.The reaction temperture was 30-50℃ lower.

介绍乙苯脱氢制苯乙烯时使用混合催化剂的情况。工业炉使用此项技术,催化剂的活性和选择性比用单一催化剂有明显提高,反应温度降低30—50℃。

The effect of mechanical mixing of Ir/γ-Al_2O_3 into reforming catalysts was studied with microreactors. It has been found that a separately supported Pt-Ir/γ-Al_2O_3 with 40-60 mesh particle size had the same dehydrocyclization activity as co-supported Pt-Ir/γ-Al_2O_3 but its hydrogenolysis activity of Ir/γ-Al_2O_3 was suppressed to a certain extent. On the other hand, the aromatization selectivity of the separately supported Pt-Ir/γ-Al_2O_3 became higher than that of the co-supported Pt-Ir/γ-Al_2O_3·Even though...

The effect of mechanical mixing of Ir/γ-Al_2O_3 into reforming catalysts was studied with microreactors. It has been found that a separately supported Pt-Ir/γ-Al_2O_3 with 40-60 mesh particle size had the same dehydrocyclization activity as co-supported Pt-Ir/γ-Al_2O_3 but its hydrogenolysis activity of Ir/γ-Al_2O_3 was suppressed to a certain extent. On the other hand, the aromatization selectivity of the separately supported Pt-Ir/γ-Al_2O_3 became higher than that of the co-supported Pt-Ir/γ-Al_2O_3·Even though Ir in separately supported form can not produce Pt/Ir clusters to any significant extent, it still has the same ability to improve the stability of the catalysts. It has been shown that in MCP reactions on Pt-Re/γ-Al_2O_3, and Pt-Sn/γ-Al_2O_3, the addition of Ir/γ-Al_2O_3 into the catalysts enhanced the ring opening and cracking reactions, and the position of ring opening was also changed. It is suggested that Ir can improve the stability of the catalysts due to its stronger hydrogen spillover ability and hydrogenolysis behavior, which converts the coke precurssors into harmless materials.

在微反装置上,利用正庚烷、甲基环戊烷等模型化合物,对以机械混合方式将Ir/γ-Al_2O_3引入单铂和双金属重整催化剂后的催化剂进行反应,考察了Ir/γ-Al_2O_3的引入对催化剂活性、选择性和稳定性的影响。机械混合催化剂的芳构化选择性比共浸催化剂高。机械混合的Ir/γ-Al_2O_3对单铂、铂锡和铂铼催化剂的稳定性也有改善作用,同时还可以提高铂铼催化剂的抗硫中毒能力.试验表明,双金属催化剂中引入铱后,五元环开环裂解活性增加较多,开环的部位也发生了变化初步认为,铱提高催化剂的稳定性的原因主要是发挥了铱自身较强的氢溢出能力和加氢裂解性能较强的特点,使得一些容易生成焦炭的反应中间物经过加氢裂解而除去.本文还利用程序升温还原技术对机械混合和共浸铂铱催化剂进行了初步考察.

 
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