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The recovery of dimethylbenzene and butylacetate from industrial spent solvent oil by batch distillation was studied,and the batch distillation experiment was performed with pretreated material.

研究采用间歇精馏法从工业废溶剂油中回收二甲苯和醋酸丁酯，对预处理后的原料进行了间歇精馏工艺实验研究。

PGF(subscript 2α) did not potentiate insulin secretion stimulated by 16.5mmolL^(-1) glucose when NIT-1β cells were in depolarized condition in the presence of 60mmolL^(-1) KCl and 250μmolL^(-1) diazoxide or pretreated with chloride channel blocker 4,4'-diisothiocyanatostithene-2,2'-disulfonic acid.

促进细胞膜去极化在PGF(下标 2α)增强胰岛素分泌中起着重要作用。

Solid superacids SO~2-_4/TiO_2-Al_2O_3 were prepared and used to catalyze the esterfication of iso-octyl alcohol and by-products in oxidization reaction of durene,which were pretreated before esterifying reaction.

考察了催化剂用量、异辛醇与混合酸的质量比、反应时间等因素对酯化反应的影响，确定了较佳的反应工艺条件：m∶m∶m=0。

Solid superacids SO(superscript 2- subscript 4)/TiO2-Al2O3 were prepared and used to catalyze the esterfication of iso-octyl alcohol and by-products in oxidization reaction of durene, which were pretreated before esterifying reaction.

以均四甲苯氧化反应副产物预处理后得到的混合酸和异辛醇为原料，在固体超强酸SO(上标 2-下标 4)/TiO2-Al2O3作用下进行合成混合酯的研究。

Solid superacids SO~2-_4/TiO_2-Al_2O_3 were prepared and used to catalyze the esterfication of iso-octyl alcohol and by-products in oxidization reaction of durene,which were pretreated before esterifying reaction.

考察了催化剂用量、异辛醇与混合酸的质量比、反应时间等因素对酯化反应的影响，确定了较佳的反应工艺条件：m∶m∶m=0.01∶3.18∶1，反应时间为3 h，在此反应条件下预处理后的混合酸转化率可达到99.9%。

The other was pretreated the electrode with electrochemical oxidation and then reduction to get an electrochemically modified electrode.

通过〓和几种常用的DNA杂交指示剂在预处理玻碳电极上的吸附和电化学行为对活化电极进行了表征。

A greater separation of dopamine and ascor-bic acid could be obtained when the electrode was pretreated electrochemically at high potentials.

更大的分离多巴胺和ascor-bicacid可当电极electrochemicallypretreated高潜能。

Electrochemical detection of DNA damage induced by Fenton reaction using an electrochemically pretreated glassy carbon electrode was studied by means of adsorptive stripping voltammetry.

利用电化学预处理的玻碳电极和吸附溶出伏安法研究了由Fenton反应引起的DNA损伤的直接电化学检测。

In order to cutting down the cost, flocculation of recombined Erwinia carotovora-Eccl3B cell from broth, influence of temperature, pH and oxidants on the separation of PHB were studied; and the method which measure the molecular weight of PHB by intrinsic viscosity was also studied; furthermore, a phenomenon was found that insolubility of PHB in chloroform can be changed by pretreated at over 120℃ for the fist time, and the mechanism of this phenomenon was explored.

为了降低成本，提高生产效率，本文针对发酵法生产PHB过程中存在的，发酵液难以分离沉淀，非有机溶剂提取PHB时分子量严重降低等问题，进行了发酵液的絮凝，及温度、pH、氧化剂对提取PHB影响的研究。并对粘度法测定PHB分子量的方法进行了研究，同时，对于研究过程中发现的，加热后PHB在三氯甲烷中的溶解性变化及其原因进行了探索。

Result The results revealed that different concentration of C6-HSL could obviously inhibit the growth rate of root and the number of roots, but have no effects on plant height, number of nodes and leaf size. The POD and SOD activities and the concentration of H2O2 showed a significantly increased when the potato implants were pretreated with C6-HSL, however, no effect of C6-HSL pretreatment on PAL and PPO activities were found. The ability of resistance aginst Erwinia carotovora subp. carotovora was signifinantly improved after treated by C6-HSL. Incidence was obviously lower than the control group.

结果］不同浓度的C6-HSL能明显抑制马铃薯的出根率和生根数，而对株高、茎节数及叶片大小没有影响；植物标志性防御酶类中POD和SOD的活性以及H2O2的产生量经C6-HSL诱导后显著提高，而PAL和PPO的活性则没有明显变化；抗病试验中，经C6-HSL诱导的马铃薯植株能有效抑制胡萝卜软腐欧文氏菌的侵染，发病率明显低于对照组。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。