查询词典 several-for-one

First, a chlorinator was self-designed in this paper, and dichloride of 2-methyl-1-propene was synthesized by 2-methyl-1-propene reacted with chlorine fast in this reactor. By means of the Orthogonal Experiments design and single factor experiments, the influence of several reaction variables on the yield were examined and the optimum reaction conditions under the intervallic operation were obtained, the yield and selectivity of dichloride of 2-methyl-1-prop-ene were more than 65% and 80% respectively. Second, the preparation of 2-methylene-1, 3-propanediol, which dichloride of 2-methyl-1-propene reacted with alkali was investigated. By means of the Orthogonal Experiments design and single factor experiments, the influence of several reaction variables on the yield were examined and the optimum reaction conditions under the intervallic operation were obtained, the conversion of dichloride of 2-methyl-1-propene was 100%. Moreover the preparation of MPO, which 2-methylene-1, 3-propanediol reacted with hydrogen, in presence of Al_2O_3-Pd catalyst, was gotten, and the product was appraised.

本文在氯化反应过程中，自行设计制作出了氯化管式反应器，在该反应器中异丁烯和氯气迅速混合反应生成二氯异丁烯，根据该氯化反应特征利用正交试验和单因素试验考察了有关因素的影响并优化得到了最佳工艺条件，二氯异丁烯的总收率达65％以上，选择性达80％；接着，对二氯异丁烯进行水解反应制得了2-甲烯-1，3-丙二醇，讨论了相关因素对水解反应的影响，并通过正交试验和单因素试验得到了较佳工艺条件，二氯异丁烯的转化率达100％；同时还对制备的2-甲烯-1，3-丙二醇在常压下采用三氧化二铝负载钯催化剂催化加氢得目的产物MPO，并对产品进行了鉴定，从而打通了整个工艺路线。

The method can precisely regulate and control the operation time of silicon rubber cold curing; the operation time endures from several minutes to several hours, and the design of the curing process is greatly facilitated.

本发明公开了一种操作时间可控的端乙烯基硅橡胶室温固化方法，该方法可精确调节控制室温硅橡胶操作时间，使得操作时间从几分钟到若干小时，极大方便了固化加工工艺的设计。

Several months ago I invested several days in order to find how to implement the multiline combobox issue.

数个月前，我投资数天，以找到如何实现多行框的问题。

The techniques of computing the domain of convergence and sum function and expanding functions in several variables to power series of functions in several variables are mainly discussed by many examples.

引入了多元函数项级数的概念，给出了其收敛域及和函数的定义；通过详实的例子讨论了多元幂级数的收敛域、和函数及多元函数展开为多元幂级数的计算方法。

Several coterminous bands could be observed by PAGE of natural Eisenin Ⅰ and several coterminous peaks of Eisenin Ⅰ were also detected with MALDI-TOF-MS when the molecular weight of three main peaks are 24, 645, 25, 052 and 25, 281, separately. The amino acid composition of Eisenin Ⅰ(pI. 8) is specilized with high content of acidic amino acids and low content of alkaline amino acids; At the same time, the content of Ser and Thr are quite high and that of Lys, Met, Phe and Trp are quite low. Eisenin Ⅰ is highly homologous with serine proteases. Then, by fibrin plate assay, Eisenin Ⅰ was identified to be a plasmin and also a plasminogen activator, and the fibrinolytic activity was inhibited by PMSF (an inhibitor of serine proteases).

赤子素Ⅰ氨基酸组成特点为高的酸性氨基酸和低的碱性氨基酸含量，且Ser、Thr含量高而Lys、Met、Phe和Trp含量很低；等电聚焦电泳测得其等电点pI.8.N端序列比较结果显示赤子素Ⅰ与丝氨酸蛋白酶类高度同源，纤维蛋白平板法测得赤子素Ⅰ同时具有纤溶酶和纤溶酶激酶活性；通过PMSF对赤子素Ⅰ纤溶酶活性的抑制实验证明，赤子素Ⅰ属于丝氨酸蛋白酶类。

There were surely several peach trees with several peaches sparsely, which survived because of growing at the crag.

我们同时发现一棵桃树有枝丫折断的痕迹，树下是百丈深渊。

This paper has described several influential factors concered with determination of work capacity of screw friction press with copper cylinder adopted as specimen, and analysed the variation law of effects of several factors on tho result of calculation.

全—一A： 2(1)由于滑块的速度和飞轮转动的角速度之间有确定的关系，所以一般测量滑块的移动速度从而确定压力机的做功能力(滑块与螺杆的动能在这里略而不计)。

The difference of analyzes result could be up to several times even several decuple if could not add the restrict to the earthquake input.

如果对输入地震波不加限制，分析结果的差异可以高达几倍甚至几十倍。

This part tries to explore several key issues in Ideological and Political Dialogue Teaching from three aspects; i.'e.; creating dialogue environment; role play of dialogist; design of topics and choice of content. It also points out several misunderstanding and alienation phenomenon that should be avoided when applying Ideological and Political Dialogue Teaching.

本部分主要从创设对话情境、对话者的角色扮演、话题的设计和对话内容的选择三方面来探讨思想政治对话教学中的几个重点问题，并指出落实思想政治对话教学应防止的几个误区和异化现象。

Now the research on HPL focus on dicotyledon, and the research on HPL of monocotyledon still havent been reported. In this paper, the research on cloning of rice HPL and enzyme activity assay were carried out and several result were obtained.1. Enzyme activity assay of rice HPLBased on the method of measure HPL Enzyme activity in other plants, the means on preparation of hydroperoxides and measurement rice HPL activity were set up. The 9-HPL arid 13-HPL activity of several rice varieties with different storability and different dormancy were tested.

本试验建立了水稻的HPL酶活性测定体系，测定了水稻萌发过程中的HPL酶活性，并进行了水稻HPL基因的克隆及表达研究，结果如下： 1、水稻HPL的酶活性测定在参考其它植物HPL酶活性测定方法的基础上，建立了水稻的HPL底物发生体系和酶活性测定体系，并测定了不同贮藏性水稻品种萌发过程中的种胚9-HPL、13-HPL活性和不同休眠性水稻品种种子的9-HPL、13-HPL酶活性。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。