乙烯基

The variance of ABA of grape during storage were discussed in this paper.The following results are been drawn:the change of the content of ABA of grapes during storage characterizes by a parabolic shaped curve with obvious peak.Low temperature (0±0.5℃) is conducive to delaying the appearance of the peak of ABA and reduces the peak value.Nine kinds of plant growth regulators and two kinds of chemicals were chosen to treat grape bunches so as to study their mechanisms on ABA of grapes,2,3,5 triiodobenzoic a...

试验研究了葡萄贮期脱落酸的变化，结果表明：葡萄贮期 ABA含量呈抛物线形变化，有明显的高峰出现，低温( 0± 0 。5℃)贮藏具有推迟 ABA峰期和降低峰值的作用，经用 9种植物生长调节剂和 2种化学药品对葡萄果穗处理试验，三碘苯甲酸对 ABA的形成有极强的抑制作用，吲哚- 3-乙酸、赤霉素( GA3)、萘乙酸和 6-苄基氨基嘌呤( 6- BA)对 ABA的形成也具有拮抗作用，矮壮素、比久( B9)、乙烯利和外源脱落酸对 ABA的形成有促进作用。

After several decades, the tireless efforts of several generations of people, has now developed into a provincial owned paint Institute, 8 production base, five branch offices and 24 holding subsidiaries specializing in the production of paint coating integrated enterprises, production 18 major categories of more than 3000 varieties, varieties have polyester, polyurethane, nitro, perchlorethylene, acrylic, epoxy, silicone, alkyd, natural resins, phenolic, asphalt, etc., are widely used in automobile, heavy industries, ships, bridges, sports facilities, chemical, pharmaceutical, power plant, metallurgy, electronics, light industry, food, city utilities, roads, railways, household appliances, furniture, architecture, decoration and other social production in all aspects of life.

经过几十年、几代人的不懈努力，现已发展成为拥有1个省级涂料研究所、8个生产基地、5个分公司及24个控股子公司的专业生产涂料油漆的综合企业，生产18大类3000多个花色品种，品种有聚酯、聚氨酯、硝基、过氯乙烯、丙烯酸、环氧、有机硅、醇酸、天然树脂、酚醛、沥青等，广泛用于汽车、重工业、船舶、桥梁、体育设施、化工、制药、电厂、冶金、电子、轻工、食品、城市公用设施、公路、铁路、家电、家具、建筑、装修等社会生产生活的各方面。

Methyl propionate is an important organic chemical raw material.

丙酸甲酯是重要的有机化工原料，在过去的研究中大多是利用CO+CH_3OH与乙烯氢酯基化反应而合成。

The item will establish a set of producing propyl- aldehyde 20 thousand t/y and its backwards' process using the advanced technology above. The main productions are propyl- aldehyde, propyl- alcohol propyl-ache, and etc..

本项目拟建设一套2万吨/年丙醛生产装置及其下游产品加工装置，采用国内研制开发的以催化稀乙烯和合成气为原料的羰基合成工艺，主要产品有：丙醛、丙醇、丙酸、丙酸钙、丙酸钠和丙酸胺等。

The obtained activation barrier of β-scission of 1-butene is 217 kJmol^(-1) in the reverse reaction of ethene dimerization.

反应的逆过程也就是1-丁烯在酸性分子筛表面的1-丁基烷氧化合物发生B分裂反应，计算所得相应的l-丁烯B分裂反应的能垒为217kJmol^(-1)，远高于相应的乙烯二聚反应能垒。

The factors A and the rate constants are given at temperature range of 200-1200 K.The results in-dicate that the loss of aβ-hydrogen from 2-hydroxyethyl radical to yield vinyl alcohol and that a 1,3-hydrogen shift to form ethoxy radical have close A factors and rate constants.

用量子化学结果和Eyring过渡态理论计算了200－1200K温度范围内，标题反应的A因子和速度常数，结果表明，2－羟乙基脱去β－H生成乙烯醇与其经［1，3］重排生成乙氧基有相近的A因子和速度常数，且常温下速度较慢，反应难以进行。

The spectral characteristics and photolysis quantum yields of ACRM composed of vinylidene chloride-methyl acrylate(VdCl2-MA) copolymer and pentamethoxyl red were measured.

本文研究了由偏二氯乙烯-丙烯酸甲酯共聚合物(VdCl2-MA)和五甲氧基红指示剂组成的酸敏变色记录材料的光谱特性，测定了其光分解量子产率。

The structuresof phosphate polyoxyethylene abietate was identified by IR.

红外光谱表明，合成产物为松香基聚氧乙烯醚磷酸酯。

The yield was 84%. With OP-10, NPE as the the catalyzer for the diazo reaction, the use of hydrolyzed propenenitrile instead of propenoic acid, and OP-10 as the catalyzers of the aminate reaction, these experiments showed the feasibility of industralization, due to the much reduced costs, shortened reaction time and a higher yield.

采用壬基酚聚氧乙烯醚（OP-10）、萘磺酸甲醛缩合物作重氮化反应催化剂，丙烯腈加成、水解替代丙烯酸，OP-10做氨化反应催化剂，通过四因子三水平正交试验法实验，得到较佳反应参数，反应时间、收率、成本都大大降低，适宜工业化生产。

Quick vulcanization adjuvant, and said adjuvant includes dithioalchol benzothiazole, dibenzothiazole disulfide, tetra methylthiuram disulfide, zinc methyl phenyl dithio carbamate and ethyleen thiourea.

助剂是：二硫醇基苯并噻唑、二硫化二苯并噻唑、二硫化四甲基秋兰姆、甲基苯基二硫代氨基甲酸锌、乙烯硫脲。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。