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- The electron withdrawing group (F) being introduced into the alkyl groups of the n-hexyl ZDDP is able to strengthen chemical adsorption between ZDDP and Fe atoms. 在伯烷基上吸电子基团能增强硫原子与铁原子之间的化学吸附作用力。
- In the fatty acid, the carboxyl group is joined while electron withdrawing group, strengthen acidly; 光气具有酰氯的典型化学性质，容易发生水解、醇解和氨解。光气是生产某些染料、医药和农药的原料。
- electronic withdrawing group 吸电子取代基
- electron withdrawing group [化] 吸电子基团
- electron withdraw group 吸电子基团
- It could also use the electronic withdrawing ability properties to moderate the ferrocene’s oxidative potential. 更可以利用其拉电子能力所引起的共振效应而提升二茂铁单元的氧化电位。
- The introduction of the electron withdrawing ester groups to the chromophore makes compound 2 to be a very sensitive fluorescent probe for Na analysis. 研究结果表明：在荧光团中引入吸电子的酯基使化合物2成为一种高灵敏性的检测钠离子的荧光探针。
- In this work, several chalcone derivatives which contained strong electron donor moiety and different groups with various electron withdrawing ability were synthesized. 本工作合成了几种具有强电子给体和不同拉电子能力基团的查耳酮衍生物;
- The introduction of the electron withdrawing ester groups to the chromophore makes compound 2 to be a very sensitive fluorescent probe for Na+ analysis. 研究结果表明:在荧光团中引入吸电子的酯基使化合物2成为一种高灵敏性的检测钠离子的荧光探针。
- The reason is that the electron withdrawing and donating of two substituting groups result in the changes in the density of electron cloud of chemical bonds in ortho position. 这是由于两个取代基的吸或供电子引起了相邻化学键的电子云密度发生变化,使旋光度相应变化,从而导致旋光性。
- Objective To research the effect of melatonin (MT) on the blood follicle stimulating hormone (FSH), luteinizing hormone (LH) and testosterone (T) of the morphine withdrawal group mice. 目的 探讨褪黑素 (MT)对吗啡戒断小鼠血液中黄体生成素 (LH)、卵泡刺激素 (FSH)和睾酮(T)的影响。
- Account keeping fees and transaction fees are debited to your account.Your electronic withdrawal transactions will be calculated from the least expensive to the most expensive. 记帐费用及交易费用将在贵方银行账户中扣除电子取款业务手续费将按照从最低收费标准到最高收费标准计算。
- Results:1 The SBP and DBP of drinking group are higher than those of nondrinker and alcohol withdrawal groups,even after adjustment for age,BMI, smoking and educa-tion(P <0.05). 结果：1 在调整年龄、体重指数、有无吸烟史及文化程度的差异后，男性饮酒组收缩压和舒张压均高于不饮酒组和戒酒组(P <0.;05) 。
- Helen became an electronic engineer. 海伦成了一名电子工程师。
- An unwanted false electronic pulse. 一种不希望有的假电子脉冲。
- This dictionary is available in electronic version. 这部词典有电子版。
- Let's have a look at your electronic computer. 让我们瞧一瞧你们的电子机算机。
- The machine is operated by an electronic pulse. 这台机器由电子脉冲信号操纵。
- I like to read books on electronic music. 我喜欢读一些关于电子音乐的书。
- An electronic device amplified the speaker's voice. 电子设备放大了演讲人的声音。
