加碱

The reported organocatalyst for asymmetric Michael additions include proline and its derivatives, chiral imidazolidinone derivatives, chiral urea, cinchona alkaloids and so on.

目前报道的催化Michael加成反应的有机催化剂主要有脯氨酸及其衍生物、手性咪唑啉酮、手性脲、金鸡纳碱衍生物等。

The reaction of α-hydroxyketone with Michael acceptor nitroalkene.was studied. After many experiments, we then found that in the presence of Zn2 and cinchonine, the α-hydroxyketone could successfully react with nitroalkene. Under our optimized condition, we gained the 95% yield of product with the ratio of syn : anti of 3:1 and 72% ee value for syn-product.

有机碱作用下α－羟基酮对硝基烯烃的加成反应研究研究了α－羟基酮类化合物与Michael受体硝基烯烃类化合物的反应，通过分析和实验发现在Zn2和辛可宁的作用下α－羟基苯乙酮能够与硝基烯烃化合物顺利反应，在优化的条件下以95%产率和3：1的Dr主要得到顺式产物，其中顺式产物的ee值最高为72%。

The indispensable salt in food, prevent the iodine that thyroid disease adds, what leaven dough uses is alkaline, people has sea fish, prawn, kelp, cod-liver oil, produce from deep-sea medicines and chemical reagents, nourishment.

食品中必不可少的盐，预防甲状腺病加的碘，发面用的碱，人们吃海鱼、对虾、海带、鱼肝油、产自海洋的药品、营养品。

The changes of gossypol in the process of cottonseed oil production,and its influence on the quality of the oil were also described.

在毛油制取过程中采用润湿蒸炒，加稀碱液蒸炒，湿式膨化等预处理工序都可有效降低毛油中棉酚含量并提高粕的品质。

Up has ball bearing, Can enlarge tyre 's transmit intension, This product possess high intensity, Acidproof, Alkali, Brine wait for feature, Temperature range widely, Prevents viscosity good, Can plus crosspiece board, Promotes point of view big, Easily washing, Maintenance simply.

上面有滚珠，可以加大轮胎的输送强度，本产品具有高强度、耐酸、碱、盐水等特点，温度范围广、防粘性佳，可加档板，提升角度大，容易清洗，维修简单。

A new process for treatment of high-sulphur and high-arsenic gold concentrate was studied, with included the roasting at lower temperature with the addition of alkali fusion agent and the cyanidation leaching with the addition of active additive.

摘 要：研究富硫高砷金精矿在加入碱熔剂经低温焙烧预处理后，再加活性添加剂条件下的氰化工艺，结果表明，金的氰化浸出率从直接氰化或沸腾炉焙烧后的焙砂氰化的30%～50%提高到87%～93%，浸出速度也有很大提高。

Accordingly, as catalyst of light oil sweetening,the binuclear cobalt sulfonate phthalocyanine was selected in this paper. Due to the double active centers in a plane, bi-CoSPc not only increases the solubility in alkaline, but also avoids its dimerisation, which expects to increase the catalyst activity in sweetening process.

为此，本文选用双核酞菁钴磺酸盐作为轻质油品脱臭催化剂，该催化剂具有平面双核的分子结构，这不仅增加了其在碱液中的溶解度，同时也减弱了二氧加合物的形成趋势，有望在轻质油品催化氧化脱臭工艺中具有更高的催化活性和使用寿命。

The addition reaction with hydrogen cyanide is base-catalysed.

与氰氢酸的加成是碱催化的。

Terephthalic acid ; hydrogenator ; stress corrosion cracking ; alkaline washing ; catalyst ; safety analysis

对苯二甲酸；加氢反应器；应力腐蚀开裂；碱洗；催化剂；安全分析

The invention use an alcaligenes faecalis as a fermentation strain, using sucrose or glucose commonly used in food industry as carbon source for microbe cultivation, using conventional chemical fertilizer in the agricultural production as nitrogen source and inorganic salt, the medium of microbial growth is prepared by auxiliary yeast powder, aerobic fermentation is processed in the conditions of 30 DEG C, 1.0vvm, 500r/min ventilatiing and stirring, adding specially supplementary food fluid in the fermentation course achieves the following aims:(1) controlling the penetrating pressure of the broth in the hypotonicity condition;(2) controlling the pH of the broth between 4.0 and 7.0;(3) providing abundant nutritious matter such as carbon source and nitrogen source for microbial growth, obtaining Weilan gum broth after 72 hours, obtainin Weilan gum product by drying in 95-115 DEG C and atmospheric pressure.

本发明以一株粪产碱杆菌为发酵菌种，使用食品工业中常用的蔗糖或葡萄糖作为微生物培养的碳源，以农业生产中常用的化肥作为氮源和无机盐，辅以酵母粉配制微生物生长的培养基，在30℃以1.0vvm、500r/min通风搅拌条件下好氧发酵，发酵过程中流加特殊配制的补料液以达到以下目的：(1)控制发酵液的渗透压处于低渗条件；(2)控制发酵液的pH处于4.0～7.0之间；(3)为微生物生长提供丰富的碳源和氮源等营养物质，经72小时得到威兰胶发酵液，在95℃～115℃下常压干燥得到威兰胶产品。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。