次乙基

This article introduces manufacturing methods of taurine by means of sodium hydroxyethyl sulfonate ammonolysis acidification .

研究了羟乙基磺酸钠氨解酸化法生产牛磺酸的工艺，对其中的高压氨解反应过程采用二次回归正交设计实验方法进行了优化。

The profile of liver CYP450 induction by DEX in male rat After 4 daily i.p. administering of 0,25, 50 and lOOmg/kg/d DEX in male Wistar rat, it was determined the total CYP450 content, the mRNA and protein expression levels of CYP3A1, CYP3A2 and CYP2B1/2, and the ERD (CYP3A catalytic activity), PROD (CYP2B catalytic activity) and BROD (total CYP450 catalytic activity) in livers.

DEX对雄性大鼠肝脏CYP450的诱导效应雄性Wistar大鼠腹注0、25、50和100mg DEX/kg/d诱导处理4天后，测定大鼠肝脏总CYP450含量，CYP3A1、CYP3A2和CYP2B1/2的mRNA及蛋白表达水平，肝脏红酶素脱甲基酶(ERD，CYP3A活性)，苄氧基试卤灵脱乙基酶(PROD，CYP2B活性)，苯氧基试卤灵脱乙基酶(BROD，总CYP450活性)，结果表明，CYP450含量、ERD、PROD和BROD在DEX多次诱导后都有升高，CYP3A1 mRNA表达水平、蛋白含量和酶活性有明显的升高，剂量效应关系明显；CYP3A2蛋白也有明显升高，而其mRNA表达水平却没有变化，提示CYP3A1和CYP3A2的诱导机制可能不同。

The profile of liver CYP450 induction by DEX in male ratAfter 4 daily i.p. administering of 0,25, 50 and lOOmg/kg/d DEX in male Wistar rat, it was determined the total CYP450 content, the mRNA and protein expression levels of CYP3A1, CYP3A2 and CYP2B1/2, and the ERD (CYP3A catalytic activity), PROD (CYP2B catalytic activity) and BROD (total CYP450 catalytic activity) in livers.

DEX对雄性大鼠肝脏CYP450的诱导效应雄性Wistar大鼠腹注0、25、50和100mg DEX/kg/d诱导处理4天后，测定大鼠肝脏总CYP450含量，CYP3A1、CYP3A2和CYP2B1/2的mRNA及蛋白表达水平，肝脏红酶素脱甲基酶(ERD，CYP3A活性)，苄氧基试卤灵脱乙基酶(PROD，CYP2B活性)，苯氧基试卤灵脱乙基酶(BROD，总CYP450活性)，结果表明，CYP450含量、ERD、PROD和BROD在DEX多次诱导后都有升高，CYP3A1 mRNA表达水平、蛋白含量和酶活性有明显的升高，剂量效应关系明显；CYP3A2蛋白也有明显升高，而其mRNA表达水平却没有变化，提示CYP3A1和CYP3A2的诱导机制可能不同。

In this thesis, we developed chiral proton N-O type ligands and employed them in the enantioselective addition of diethylzinc to N-diphenylphosphinoyl imines. The relationship between the structure of the ligands and the enantioselectivity was systematically studied. Furthermore, enantioselective butylation of N-diphenylphosphinoyl imines withBu〓Zn and enantioselective diphenylzinc addition to imine were also examined.

本文致力于亚胺的不对称催化有机锌试剂加成反应的研究：以手性质子型N-O配体为促进剂，对N-二苯基次膦酰亚胺进行不对称乙基锌加成反应而展开研究工作，系统地考查了手性配体的结构对反应的影响；另外，对N-二苯基次膦酰亚胺的不对称催化丁基锌加成进行了研究，并首次对亚胺的不对称苯基锌加成反应进行了初步探索。

Methoxy sec-ethyl acetate, Ethyl acetate, Ethyl forate,α-Pinene,β-Pinene, Camphene, Junipene, Limonene, P-Cymene, Linalool and Terpinole are regarded as the key flavorous components, which result in the peculiar smell and taste in fruits of Rubus L..

综合分析表明，甲氧基次乙基乙酸酯、乙酸乙酯、甲酸乙酯、α-蒎烯、β-蒎烯、莰烯及桧烯、柠檬烯、对伞花烃、芳樟醇、萜品醇类等化合物是四种悬钩子类果实的主要香味成分。

Company will be completed and put into production new products flame-retardant materials CEPPA 2 - carboxy-phenyl ethyl phenyl DCPP Hypophosphorous and phosphorus dichloride.

公司即将建成并投产的新产品阻燃材料CEPPA 2-羧乙基苯基次磷酸及DCPP苯基二氯化磷。

The pure isomers 3-(1-hydroxyethyl)-8-vinyldeuteroporphyrin Ⅸ and 3-vinyl-8-(1-hydroxyethyl)deuteroporphyrin Ⅸ were obtained from protoporphyrin Ⅸ dimethyl ester.Starting from these two acetylating compounds,eight new porphyrin derivatives were synthesized through an alkyloxy fission reaction.

以原卟啉Ⅸ二甲酯为起始原料，合成并分离得到3-(1-羟乙基)-8-乙烯基次卟啉Ⅸ（Ⅱ1）和3-乙烯基-8-(1-羟乙基)次卟啉Ⅸ（Ⅱ2）二个异构体，两者分别经酰化后与醇进行烷氧裂解反应合成了8个全新的卟啉衍生物。

Total mercury and methyl mercury concentrations were analyzed by cold vapor atomic fluorescence spectrometry and aqueous phase ethylation,GC separation,and CVAFS detection.

2006年1~12月，每月采集乌江流域梯级水库入出库河流水样，用两次金汞齐-冷原子荧光光谱法和蒸馏-乙基化结合GCCVAFS法测定了水中总汞和甲基汞的浓度。

We propose that ethylene is part of a signaling pathway that modulates cell diision in the quiescent center in the stem cell niche during the postembryonic deelopment of the root system.

我们假设在根系统胚后发育过程中，次乙基调节在干细胞维环境静止中心区域的细胞分裂的一个信号转导通路

Experiments with CrO(superscript 2- subscript 4) as target molecules, and triethyl 12-mercsptododecylammonium immobilized on a microcantilver as the detection probe, were conducted on an atomic force microscope.

以表面修饰了三乙基氢硫基十二基铵层的微悬臂梁为传感元件，以CrO(上标 2-下标 4)为被测物，在原子力显微镜上检测了敏感层吸附CrO(上标 2-下标 4)前后微悬臂梁的5次、6次、7次和8次谐振频率的变化。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。