starting material

Screening for2-bromo-butyric acid as the starting material, after ammonolysis, esterification, ester amine solution, split, five-step cyclization reaction Levetiracetam.

筛选以2-溴代丁酸为起始原料，经氨解，酯化，酯胺解，拆分，环合五步反应制得左乙拉西坦。

Using magnesia as main starting material and adding appropriate amount of low and intermediate temperature compound sintering agent and super micro powder, with a small oscillation making the substance flow, an unformed material of high density and strength is obtained.

以镁砂为骨料，添加适量的低、中温复合烧结剂和超微粉，在较小的振动力作用下，使物料流动，并获得较高的堆积密度与强度的不定形材料。

A modified method of the preparation of anisaldehyde through oxidation of anethol in the presence of MnO_2-H_2SO_4 with natural star aniseed oil as the starting material is stated.

本文叙述了以天然茴油为原料用MnO2-H2SO4氧化法进行氧化制备大茴香醛的改进方法。

A high strength insulating brick with high alumina and low iron oxide has been developed by using floating particles and bonding clay as starting material with expanding agents, flux and combustible additives.

以漂珠、结合粘土为原料，加入膨胀剂、助熔剂和可燃加入物.可制得高强、高铝、低铁隔热耐火砖。

The Kyoto University researchers hope to be able to repeat their success using sliversof skin as starting material, allowing men to father children that are genetically their own.

日本京都大学的研究者们希望可以复制他们的成功经验，以皮肤组织为原始材料，让男性拥有自己的亲生孩子。

The author's purification methods, which enhanced the yield of pure protein and shorted the time for isolation, have several advantages: 1. use of oxygen_evolving PS ⅱ core complexes as the starting material in order to avoid disturbing from other cytochromes;

该方法的主要特点：1.以放氧核心复合物为起始材料以避免其他细胞色素的干扰；

Using alcohol as starting material, double octyl quaternary ammonium bromide was obtained. It's yield reached 80 %.

以脂肪醇为原料, 合成了双辛基季铵溴盐,其产率达80%.

A new solid base catalyst of calcium methoxide calcium carbonate as the starting material.

以碳酸钙为基础材料,制成高效酯交换催化剂甲醇钙.

Salidroside was synthesized by first preparing the intermediate, salidroside tetraacetate ( using tyrosol as starting material), and then deacetylizing it.

红景天甙以酪醇为原料，经制得中间体四乙酰基红景天甙后，再脱乙酰基合成而得。

A tremendous amount of work has been done on the purification of the starting material.

人们在提纯原始材料方面做了大量的工作.

Conductive Polyaniline was prepared by chemical oxidation using aniline as the starting material and hydrocarbon as the doping agent.

以苯胺为主要原料，盐酸作掺杂剂，采用化学氧化法制备出导电聚苯胺。

With high alumina cement and floating particle as main starting material, a new unfired floating particle insulating refractory product has been developed.

以高铝水泥和漂珠为主要原料.研制出一种新型不烧漂珠隔热耐火制品。

Technical processing of low-sugar preserved Passiflora edulis Sims was studied by use of Passiflora edulis Sims pericarp as starting material.

以西番莲果皮为原料，研究了低糖果脯的加工工艺。

By using tetra-glycol as starting material, a polyamine cross-linked resin is synthesized.

以四甘醇为起始剂, 合成了多胺交联树脂.

The Starting material is melted and poured into the quadrate billets, then rolled out in wire rods, finally drawn into brazing wire.

按合金组份配制的原料用氧化铝坩埚在真空中频感应炉中熔键成方坯条，再轧制成丝坯，最后拉制成钎焊丝材。

What constitutes the "starting material" may not always be obvious.

什么构成了“起始物料”并不总是很明显。

Dioscorea zingiberensis C. H. Wright of dioscoreaceae is an important medicinal plant growing only in China by reason that diosgenin in its rhizome is a widely used starting material for hormone drugs.

盾叶薯蓣（Dioscorea zingiberensis C.H.Wright）是我国特有的、具有重要经济意义的药用植物，其有效成分薯蓣皂甙元（diosgenin）是合成甾体激素药物的重要原料。

Little resistance during operation, capable of starting onload and conveying material at high speed.

运行阻力小, 能有载启动,可高速输送物料.

With the starting material intermediate titanyl sulfate and meta-titanic acid of titanium white product by sulfuric acid process, the titanium dioxide and iron content have been determined.

以硫酸法钛白粉生产工艺中间体浓钛液（硫酸氧钛）和偏钛酸为原料，分析了浓钛液中二氧化钛和铁的含量。

Pinane can be prepared by catalytic hydrogenation of turpentine and can be used as a starting material in the synthesis of many terpenoid perfumes.

将松节油催化加氢可制得蒎烷。蒎烷是合成多种萜类香料的原料。

Loteprednol etabonate was synthesized through oxidation, acylation, hydrolysis and chloromethylation from the starting material prednisolone.

以泼尼松龙为原料,经氧化 、 酰化 、 水解成盐、氯甲基化成酯制得氯替泼诺.

Arachidonic acid is the starting material from which potent inflammatory compounds such as leukotrienes are made.

花生四烯酸是从哪个有力的起始原料,如白三烯是由炎症化合物.

Diosgenin has been studied as an important bioactive compound and starting material, it mainly comes from dioscorea zingiberensis.

薯蓣皂素是一种重要的活性化合物和原料药，主要来自于黄姜。

Let's say we have an abundance of the starting material, and not very much light.

比如我们有大量的反应物，但是没有光。

Zanamivir was synthesized with salic acid as starting material by enzymatic catalysis method.

以自制唾液酸为起始原料，对扎那米韦的合成工艺进行研究。

SOI ( Silicon on insulator) as a kind of irradiation hardness starting material has been widely used in areas of defense and space navigation.

SOI（Silicon on Insulator）材料作为抗辐照器件材料在国防、宇航等领域得到广泛应用。

Cefixime open side chain acid was prepared by oximation, etherification, chlorination, ester decomposition using t-butyl acetoacetate as starting material.

以乙酰乙酸叔丁酯为原料，经过肟化、醚化、氯代酯解反应合成了头孢克肟开环侧链酸。

Provided is a method of preparing the anthracycline carminomycin using a starting material comprising daunorubicin.

本文提供了一种使用包含柔红霉素的起始物料来制备蒽环类洋红霉素的方法.

Method Valganciclovir was synthesized through esterification and hydrogenation, using ganciclovir as starting material.

方法以更昔洛韦为原料,经过酯化、还原两步反应得到目标物缬更昔洛韦.

Ultimately all the starting material is converted into products.

最终全部原料都转变成为产品。