英语人>网络例句>戊酸异酯 相关的搜索结果
网络例句

戊酸异酯

与 戊酸异酯 相关的网络例句 [注:此内容来源于网络,仅供参考]

In the process of producing soft urethane polyester foamed plasics,CFCs as forming agent are replaced by cyclopentane whose value of ozone depletion is zero to decrease the destruction of environment,and the modified poly-ether-alcohol is used as reactants through one-step reaction.

为了解决软质聚氨酯泡沫塑料生产过程中的环保问题,采用臭氧消耗值为零的环戊烷为物理发泡剂替代严重破坏臭氧层的氯氟烃,以改性聚醚多元醇与甲苯二异氰酸酯等为主要反应物,一步法反应研制试产了软质聚氨酯泡沫塑料。

BACKGROUND: Copolymers of 3-hydro-xybutyrate and 3-hydroxyvalerate is a synthesized product of microorganism in unbalance growth environment, characterizing by degradation and thermoplasticity.

背景:聚羟基丁酸-羟基异戊酯是微生物在生长条件不平衡状态时合成的产物,具有可降解性、热塑性,作为组织工程的新型支架材料,越来越受到重视。

This experiment with dilute alkali swelling on collagen extraction and separation, then purified by gel from collagen, and then glutaraldehyde, carbodiimide, has three types of di-isocyanate cross-linking agent on the plastic recombinant protein molecules cross-linked, the final test of infrared spectroscopy analysis of the results of their cross-linking to determine the extent of the effectiveness of cross-linking cross-linking agent to have an initial understanding.

本实验用稀碱溶胀法对胶原蛋白进行提取与分离,接下来用凝胶层析纯化所得胶原蛋白,然后用戊二醛、碳化二亚胺、己二异氰酸酯三种交联剂对胶原蛋白分子进行重组交联,最后通过对红外光谱测试结果的分析,对其交联程度进行判断,对交联剂的交联功效有一个初步的了解。,谢谢。

Objective: To use p-toluene sulfonic acid as the catalyst for the esterification reaction of cinnamic acid with isoamyl alcohol in liquid phase.

目的:以对甲苯磺酸为催化剂对肉桂酸与异戊醇的液相酯化反应进行研究。

Using pentaerythritol as initiator, boron trifluoride diethyl etherate as catalyst.dichloroethane as dispersion agent, the chloride polyether polyol is synthesized based on the mechanism of cationic ring-opening polymerization of epiclilnrohyclrin.The azide polyether polyol is synthesized, in DMF through A and sodium azide, and the non-reported azide energetic curing agent is synthesized through the adduction of B and IIDI.

以季戊四醇为起始剂,三氟化硼乙醚为催化剂,1,2—二氯乙烷为分散剂,环氧氯丙烷经阳离子开环聚合反应制成氯化聚醚多元醇,A在N,N—二甲基甲酰胺中与叠氮化钠反应制得叠氮聚醚多元醇,B与六亚甲基二异氰酸酯加成反应制得未见文献报道的叠氮固化剂。

Compounds 3a-3d, 4a-4d, 5a-5d, 6a-6e and 7a-7e were prepared with a new efficient method, in which the aromatic amines were diazotized with isoamyl nitrite in EtONa/EtOH under refluxing condition, and mono -, bis -and tetrakis -substituted calix [4] arenes were obtained respectively as main product by diazo-coupling in different molar ratio to calix [4] arene.

一,提出了一个有效的新方法合成含有芳香偶氮基团的杯[4]芳烃衍生物3a-3d;4a-4d;5a-5d;6a-6e和7a-7e:即在非水溶剂乙醇中用亚硝酸异戊酯,在强碱乙醇钠存在下对芳香胺进行重氮化,得到芳香重氮酸盐沉淀,过滤,然后加入杯[4]芳烃的四氢呋喃溶液,通入CO〓气体调节溶液的pH值为7-9,使其发生偶联反应。

第6/6页 首页 < 1 2 3 4 5 6
推荐网络例句

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面,更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值,分为几个相等的区间作为横轴,并将各区间内所测定值依所出现的次数累积而成的面积,用柱子排起来的图形,也叫做柱状图。

You rap, you know we are not so good at rapping, huh?

你唱吧,你也知道我们并不那么擅长说唱,对吧?