以...为条件

Epoxypropyl triethyl ammonium chloride intermediate was synthesized by the reaction of triethylamine with epichlorohydrin in aqueous methanol using K_2SO_4 as catalyst.

以环氧氯丙烷的转化率和产物中环氧基保留率的乘积作为中间体性能的评价指标，通过正交实验优化出最佳条件：甲醇水溶液为溶剂，反应温度50℃、n∶n=0.010、n∶n=1.0、反应时间为1.5 h。

The different enzyme protecting agent had effected on the liquid alkaline protease under the dissimilar condition. Taking the living rate of enzyme as the target, we obtained one high effective alkaline protease stabilizing agent formula through orthogonal experiments as following: 5 mmolL^(-1) Ca(superscript 2+), 15mgmL^(-1) trimethylene glycol-single methyl ether, 0.015% 4-formyl phenyl-boron dihydroxide, 1% glycerine.

在此基础上，进行L13(3^7)正交实验，以相对酶活率为指标，考察了不同酶活性保护剂在不同条件下对液体碱性蛋白酶活力的影响，筛选到一种优质高效的碱性蛋白酶稳定剂配方为：5mmolL^(-1) Ca(上标 2+)，15mgmL^(-1)丙二醇－单甲醚，0.015% 4-甲酰苯基硼酸，1%甘油。

The effects of temperature,time,EtOH consistency and stock ratio on extraction yield of 4 kinds of triterpene acid s were investigated by orthogonal test.

以科罗索酸提取率为指标，通过正交试验考察了枇杷叶中4种三萜酸提取效果的影响因素，其最佳提取条件为：温度80℃，提取时间3。

In addition, environmental induced structure conversion of amphiphilic block copolymer film is also being investigated.3. Acrylic acid was polymerized directly in aqueous phase in the presence of a water-soluble trithiocarbonate as RAFT agent, and well-defined poly with low polydispersity index and high molecular weight was successfully prepared.

与同类文献比较，具有方法简单易操作并在以环境友好的水为介质的条件下反应的优点，且在高的单体和RAFT试剂比例与高转化率的情况下，没有观察到链转移的现象，为进一步合成高分子量的嵌段共聚物提供了潜在的方法。

Nine medium compositions were used to study their effect on I40 using Plackett-Burman design. The production of biomass for I40 was affected in order of yeast extract, tryptone, glucose, and production of protease affected in order of feather, tryptone and yeast extract.

最是化条件探讨方面，於基础培养基中分别添加九种单因子，以PB design分析，结果发现对於I40生长影响较为显著的因子依序为：yeast extract、tryptone、glucose，而对於该菌生产蛋白酶产量影响较为显著的因子依序为：feather、tryptone、yeast extract。

In this paper, 35 Tupaia blangeri chinensises captured from Kunming,Yunnan province were investigated. We analyzed hereditary conditionality index about some morphological characters. According to Rife-Buranamanas law, We analyzed the appearance characteristics with hereditary conditionality including color of fur, orbit etc.. The results showed the following: wild fur with seasonal red spot, white fur of abdomen, non-white orbit, fleshcolor palm, non-cocked ear, round tip tail, and the line between the breasts of both sides in a vertical position with axis line.

主要以上海市肿瘤研究所购自云南昆明地区的35只中缅树鼩及其实验室条件下繁殖的G1代为试验素材，对涉及形态性状遗传制约性的一些指标进行分析，应用Rife-Buranamanas 定律分析中缅树鼩涉及毛色等诸多具有遗传制约性的外貌特征的显隐性关系，得出中缅树鼩典型的外貌特征为野生型毛色有季节性红斑、白腹、没有白眼圈、掌底肤色为肉色、耳朵不竖、圆形的尾尖、两侧乳房每对之间的连线分别与体轴线垂直。

With the fact of the unmature F1 maket of China, this article also suggestes, in order to promote the development of F1 industry, people should invest companies like FOA to develop the whole car-racing market firstly.

本文认为，在当前我国 F1产业刚起步的条件下，应当借鉴 FOA 的模式，投资发展赛事管理类公司，以培养赛车市场为目标，从而为 F1 产业的发展创造盈利空间。

The infrared radiation characteristics of unsymmetrically two dimensional nozzle are experimentally studied. UTDN is designed and manufactured by prolonging one broad side of a general two-dimensional nozzle AR8 and its aspect radio is 8. Temperature distribution on the axes and spectral IR intensity on the orientation of 0, 10, 30, 60 and 90° on three typical detective planes of the hot plume are measured on hot plume simulation platform of the turbo fan engine.

为了研究非对称二元喷管(Unsymmetrically two-dimensional nozzle， UTDN)的红外辐射特性，首先以宽高比为8的常规二元喷管(AR8)为基础，设计加工了UTDN，然后在涡扇发动机热喷流实验台上测量了UTDN轴线上的温度分布以及在后半球典型探测面内0， 10， 30， 60和90°方向上的红外光谱辐射强度，积分得到辐射强度的空间分布，并在相同的实验条件下，与AR8进行了比较。

The research results of the seed dormancy showed, the seeds of Valeriana amurensis reached highest germination rate (82%) at the temperature treatment in alteration of 10℃ and 25℃, and soil was fertile sandy.

对黑水缬草种子休眠生理进行研究的结果显示：以沙质壤土为基质，配合(10-25-10)℃的变温条件，黑水缬草的发芽率达到最大，为82.1%；黑水缬草种子浸泡液、粗提液以及乙醚浸提液均对黑水缬草的发芽率有抑制作用。

n thes paper, the oligomers with different molecular weight of monohydroxylpolyethersulfones were synthesized in solution and the optimum condition ofpolymerization was obtained; With phase transfer catalyst method,the oligomerswas obtained and transformed to monovinylpolyethersulfones macromer. Its structure was characterized with IR and 1H-NMR.

本文采用溶液法以单酚（4－氯－4'－羟基二苯砜）为原料合成了不同聚合度的单酚低聚体，得到了控制聚合度的最佳聚合条件；用相转移催化剂法成功地将单酚转化为单烯大分子单体，并用IR、1H—NMR对其结构进行了表征；测定了双键官能度均在1.90以上。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。