查询词典 in preparation for

In addition, the preparation and package and store for standard reference materials of antioxidant BHT are studied.

本论文主要叙述了对工业品防老剂BHT的重结晶提纯和区域熔融提纯(自行设计和制造了区域熔融仪，申请了发明专利)来制定防老剂BHT标准物质的研究：通过实验确定了乙醇重结晶提纯工艺；利用自行设计区域熔融装置，拟定操作规程和技术条件；确定提纯样品的高效液相色谱法和差示扫描量热法的纯度检测条件和实验方法；用高效液相色谱检验BHT标准物质的均匀性、稳定性；分别用高效液相色谱法和差示扫描量热法测定这种标准物质的不确定度评定及两种不同原理检测的定值分析；最后确定标准物质BHT的纯度和合成标准不确定度：标准物质的制备、包装及贮存。

The preparation method of a solid defoamer for papermaking was discussed in this paper.

讨论一种在造纸过程中应用的固体消泡剂的制备方法和应用。

In the second part of the paper , oxidation of phenanthrene for the preparation of phenanthrenequinone by using halogen compound was studied . The chief factors of this method was discussed , and the optimum processing condition was obtained . The mechanism of the reaction by potassium hydroxide-precipitated was discussed , and the reaction kinetic parameters was measured .

论文第二部分研究了卤素化合物作为氧化剂氧化菲合成菲醌的方法，探讨了这种氧化方法的主要影响因素，从中找出较佳的工艺条件，并对其反应机理进行了初步探讨，测定了氧化反应的一些动力学参数。

A new synthesizing route for ethyl-2-(p -ethoxyphenyl) propenoate preparation was proposed, in which, the ethyl-2-(p-ethoxyphenyl) propenoate was synthesized from phenetole via Friedel-Crafts reaction and Wittig G reaction.

设计了一条以苯乙醚为起始原料，经过Friedel-Crafts反应、WittigG反应合成2-对乙氧基苯基丙烯酸乙酯的新路线。

A series of convenient and efficient reactions have been developed. Especially, instead of using toxic phosgene, the triphosgene was employed in the synthetic process of some receptors, which provides a convenient. safe and efficient method for the preparation of chiral unsymmetrical urea.

深入研究了它们的合成方法，实现了多种简便有效的选择性合成，特别是以三光气代替剧毒的光气，实现了一条简便、安全、有效的制备手性不对称脲的方法。

In addition, the conditions for preparation of nano-CdSwith the optimal photocatalysis activity were summarized.

此外，总结了光催化活性最佳时CdS催化剂的制备条件。

Solid-state pyrolysis of iron phthalocyanine in a sealed system was investigated for the preparation of carbon with novel nanostructures.

研究了酞菁铁在密封体系中固态热裂解制备新型炭纳米材料的方法。

In this paper , the molecular structure , characteristic of molecular spectra , methods for preparation and the applicable areas of metal phthalocynine and metal free phthalocyanine were commented .

本文首先对酞菁配合物的结构、性质、制备方法和应用做了介绍，并回顾了近年来蛋白质探针的研究进展及蛋白质分析的一些重要方法。

This paper has studied the technological process for preparation of grain potassium picrate, which can meet the requirements of production in batches.

研究了粒状苦味酸钾的合成方法和工艺条件，此工艺已扩大到几百克量级，可满足于火工药剂的批量生产。

The invention discloses an antibody against cattle piron and method for preparation, wherein the antibody is obtained by using polypeptide selected from the following polypeptide family as the antigen immunological animal, said polypeptide family is formed by the following polypeptides,(1) polypeptide of the amino acid residue sequence 1 in the sequence table,(2) polypeptide obtained by removing 1-24 amino acid residues continuously from No.

本发明所提供的制备牛朊病毒抗体的方法，是以选自下述多肽家族之一的多肽为抗原免疫动物得到的抗体；所述多肽家族由以下多肽组成：1具有序列表中序列1的氨基酸残基序列的多肽；2从序列1的自氨基端第1位氨基酸残基开始向羧基端连续去除1至24个氨基酸残基，和/或从序列1的自氨基端第264位氨基酸残基开始向氨基端连续去除1至23个氨基酸残基得到的多肽。

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