用合成法合成

This method were very different from coprecipitation method by which Cu-based catalysts were normally prepared.

该方法完全不同于通常用来制备铜基甲醇合成催化剂的共沉淀法。

Cu/ZrO2 catalyst prepared by coprecipitation was used for synthesis of iminodiacetic acid from diethanolamine via dehydrogenation.

用共沉淀法制备的Cu/ZrO2催化剂进行二乙醇胺催化脱氢合成亚氨基二乙酸，分别考察了催化剂用量、原料配比、反应温度、反应压力和反应时间等因素对反应的影响。

Its mainly produced by cumene peroxidation process, which requires three steps of reactions and is limited by the market requirement of equimolar byproduct acetone.

目前工业合成苯酚的最主要方法是异丙苯法，此法经过三个步骤：以苯和丙烯为原料，在酸催化下生成异丙苯，异丙苯经氧化生成过氧化氢异丙苯，再用硫酸或树脂分解，同时得到等摩尔的苯酚和丙酮。

The invention clones geranyl pyrophosphate synthase GGPPS gene from the ginkgo to construct plant expression vectors which contain ggpps gene, the ggpps gene is inducted into immature embryos of the ginkgo to induct out the callus tissue by the mediating of agrobacterium tumefaciens, PCR and semiquantitative RT-PCR detect the conformation and expression status of exogenous target gene ggpps, high-performance liquid chromatography and an evaporative light-scattering detector are employed to determine the terpene lactones content inside the callus tissue of the ginkgo, and the obtained callus tissue of the ginkgo of which the terpene lactones content is increased is screened.

本发明从银杏中克隆香叶基香叶基焦磷酸合成酶GGPPS基因，构建含ggpps基因的植物表达载体，用根癌农杆菌介导，将ggpps基因导入银杏幼胚并诱导出愈伤组织，PCR和半定量RT-PCR检测外源目的基因ggpps的整合和表达情况，高效液相色谱法及蒸发光散射检测器测定银杏愈伤组织中萜内酯含量，筛选获得银杏萜内酯含量提高的转基因银杏愈伤组织。

To study genetic mutations of methylenetetrahydrofolate reductase C677T and cystathioinine-β-synthase T833C related to homocysteine metabolism in patients with ischemic stroke, the MTHFR gene C677T gene mutation and the CBS T833C gene mutation were detected by PCR-RFLP or ARMS method in 74 patients with ischemic stroke and 83 normal people for control. Results showed that the frequencies of MTHFR genet homogenetic type(2.7%), heterogenetic type(51.4%) and T allele(28.4%) in ischemic group were higher than those in control group(1.2%, 39.8% and 21.1%, respectively).

为研究同型半胱氨酸代谢相关酶亚甲基四氢叶酸还原酶基因C677T和胱硫醚-β合成酶基因T833C位点碱基突变与缺血性脑卒中的关系，对74例缺血性脑卒中患者和83例健康对照者，采用聚合酶链反应-限制性片段长度多态性技术检测MTHFR基因C677T基因型，用扩增阻滞突变体系法检测CBS基因T833C突变。

The iodometric titration was used to determine the oxida- tion state of Fe ions and the oxygen nonstoichiometry in La1-xSrxFeO3-δ.

用FTIR、TG-DTA、XRD等对产物形成过程及结晶学特征进行了研究，考察了合成样品与Sm0.2Ce0.8O1.9的化学相容性；利用碘滴定法测定了该系列产物中Fe元素的平均表观化合价和氧的非化学计量值。

The results show that monoclinic sulfur nanoparticles was successfully synthesized by liquid phase precipitation method.

结果表明，用液相沉淀法成功地合成了颗粒均匀、粒径50～80 nm 的球形单斜相硫纳米粒子。

The reaction conditions for synthesizing methylhydroquinone using p nitrotoluene and conc.H\-2SO\-4 in the presence of catalyst were studied experimentally with the uniform design method,and the major influencing factors were researched.

用均匀设计法实验研究了对硝基甲苯与浓硫酸在催化剂作用下合成甲基对苯二酚的反应条件，考察了各种影响因素。

Four new solid complexes of rare earth with phenoxyacetic acid and 1,10 phenanthroline were synthesized ,and their composition,solubility and molar conductance were studied.

合成了钕、钇、镝、镥等稀土·苯氧乙酸·邻菲罗啉三元配合物。用化学分析法研究了它们的组成以及它们在不同溶剂中的溶解性能和摩尔电导等物理性质。

Phenylbenzimidazole was synthesized by solvent-free reaction of o-phenylenediamine and phenylacetic acid accelerated by microwave irradiation and catalyzed by HCl.

标题化合物C14H12N2在无溶剂条件下，用微波辐射法以盐酸作催化剂、邻苯二胺和苯乙酸为原料合成得到。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失