转化率

The researching content was as follows: 1. When AlClx/HY zeolite be used as catalyst, the effects of the ratio of 2-methylnaphthalene to tetramethyl benzene, catalyst concentration, reaction temperature and reaction time on the conversion (based on 2-methylnaphthalene), yield and selectivity (both based on 2,6-DMN) were discussed. In addition, by orthogonal experiment, the optimum reaction conditions were determined at the same time. The optimum reaction conditions : the molar ratio of 2-methylnaphthalene and tetramethyl benzene =1:1, reaction temperature was 400℃.

具体研究如下： 1、以AlClx/HY型分子筛为催化剂，研究原料配比(2-甲基萘与均四甲苯的摩尔比)、反应温度和反应时间对2-甲基萘的转化率、目的产物2，6-DMN的收率和选择性的影响，并通过正交实验确定了该催化剂体系下的最佳反应条件为：原料的摩尔比为(2-甲基萘：均四甲苯)=1：1，反应质量空速为6h-1，反应温度为400℃。

By PCR analysis and spreads the leaf examination with PPT in T0 regeneration, 4 transgenic plants were identified with a transferent frequency of 0.33%. In addition, we transfer the wheat Bar gene into wheat cultivated varieties with backcross way.

通过PCR检测和涂叶检测，初步证明其中有4株已将Bar基因整合到小麦基因组中并且得到表达，平均转化率为0.33%。

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。

A series of UV curable waterborne hyperbranched polyester s with different acid/amine terminal rate,which contained -OH?-COOH and methacrylic chain end groups,and were partly neutralized with thertiary amine,were synthesized from trimellitic anhydride,epichlorohydrin,glycidyl methacrylate and triethylamine.

以偏苯三酸酐、环氧氯丙烷、甲基丙烯酸缩水甘油酯、三乙胺合成了末端羧基与氨基不同比例的一系列可UV固化的高支化聚酯，研究了末端官能团对合成产物水溶性、粘度以及凝胶转化率的影响。

The cyclization conditions were optimized with respect to reaction system, time, temperature, catalyst nature and its content, and ZnCl2 is found to be more suitable than other catalysts investigated for the trimerization of aromatic nitriles under normal pressure, and the maximum conversations of terephthalonitrile and 4,4'-dicyanobiphenyl were 82% and 78%, respectively.

优化了反应体系、温度、时间、催化剂种类和含量等工艺条件，结果表明，对于氰基在常压下的环化反应，ZnCl2是较为合适的催化剂，TPH和DCB聚合转化率最高分别可达82%和78%。

Experimental results showed that the hydrogenation degree can be enhanced significantly by the addition of triphenylphosphine. When the molar ratio of TPP, TPPTS and Ru is 2:5:1, 89% hydrogenation degree can be achieved after 12 h under reaction conditions of 5.0 MPa and 150~C.

考察了溶剂种类、水溶液的pH值、添加助剂三乙胺、水／有机两相体积、底物浓度等对对-氯硝基苯转化率和生成对-氯苯胺选择性的影响，并在90℃、4.0MPa、反应时间为6h的条件下，进行了催化剂的循环实验。

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。

There were 48 broilers in every replication, and the broilers were reared in unartificial environment.

结果表明，AA肉鸡和北京油鸡在三个不同生长阶段的日增重、日耗料和饲料转化率具有不同变化趋势。

CO conversion of 80.27%, 78.41% and 61.14% and selectivity to C(superscript + subscript 5) of 88.54%, 88.57% and 77.95%, respectively, were obtained for Fischer-Tropsch synthesis under n(H2): n=2.0, 483 K, 1.5 MPa and 800h^(-1) over uncalcined catalyst, those calcined at 673 K and 923 K.

在原料气n(H2)：n=2.0、483K、1.5MPa和800h^(-1)条件下，未焙烧、673K和923K焙烧的催化剂上进行F-T合成反应，CO的转化率分别为80.27%、78.41%和61.14%，重质烃的选择性C(上标+下标 5)分别为88.54%、88.57%和77.95%。

The invention uses low cost grease which are mainly waste resources such as the unedible Jatropha curcas seed oil, the waster oil in the restaurant industry and the acid value oil, etc. as raw materials, thereby enlarging the material sources; because the Rhizopus chinensis CCTCC M201021 full cell lipase which is extremely low in cost is used as the catalyst, the problem of high price catalyst is effectively resolved; the toxic action of the alcohol on the biological catalyst is resolved by the batching fed-batch the short chain alcohol, thereby improving the conversion rate of the short chain alcohol.

本发明以廉价油脂为原料，主要是非可食用性的麻疯籽油以及餐饮业废油、酸价油等废物资源，扩大了原料的来源；采用价格极其低廉的华根霉全细胞脂肪酶作为催化剂，有效地解决了催化剂价格高昂的问题；分批流加短链醇以解决醇对生物催化剂的毒害作用，提高短链醇转化率。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。