查询词典 synthesis

Subsequently,enol methylation of P in basic condition completed the synthesis of malyngamide O.Applied this route to the synthesis of malyngamides Q and R,the chiral unsaturated acid was connected with the vinyl chloride part by amidation,then the resulting product was converted into the corresponding aldehyde,followed by aldol condensation of the aldehyde with the chlorotitanium enolate of pyrrolidone to complete the skeleton of malyngamides Q and R,then the synthesis of them was completed via enol methylation in acid condition.

该合成路线拓展应用到malyngamides Q和R的合成时，首先用酰胺键将手性不饱和脂肪酸和烯氯片段连接，再转化成相应的醛，与乙酰基吡咯酮进行TiCl_4催化的aldol反应即得到malyngamides Q和R的骨架结构，再经过酸催化的烯醇甲基化反应完成了Q和R的全合成。

Fluorenyl methoxy carbonylsolid-phase synthesis of Fusukang was studied firstly,including stepwise solid-phase peptide synthesis and solid-phase convergent synthesis.

研究了36肽扶素康的9-芴甲氧羰基法固相化学合成，包括Fmoc固相逐步化学合成和Fmoc固相片断缩合化学合成。

Using the intact G1-nuclei prepared from an isogenic yeast strain lacking mitochondrial DNA , we demonstrated that the DNA synthesis observed within the first 10-20 min was largely due to mitochondrial DNA synthesis, whereas nuclear DNA synthesis did not begin until after a 10-20 min lag period.

利用从缺少线粒体DNA的菌株中制备的完整G1期细胞核，证明了最初10-20min的滞后期内的DNA合成主要是由线粒体DNA合成造成的，而核DNA合成是在经过10-20 min后才开始。

Five synthesis methods of AlN powder were discussed,namely direct nitrogenation of Al powder,carbothermal reduction of Al2O3,chemical vapor deposition,sol-gel method,self-propagating high-temperature synthesis and plasma chemical synthesis.

凝胶法、自蔓延高温合成法和等离子化学合成法；分析AlN烧结助剂的选择和5种烧结工艺：热压烧结、无压烧结、放电等离子烧结、微波烧结及自蔓延烧结；阐述AlN基板的制备工艺及其影响因素。

Five synthesis methods of AlN powder were discussed, namely direct nitrogenation of Al powder, carbothermal reduction of Al2O3, chemical vapor deposition, sol-gel method, self-propagating high-temperature synthesis and plasma chemical synthesis. The choice of AlN sintering additives and five sintering technologies were analysed, namely hot pressing sintering, pressureless sintering, spark plasma sintering, microwave sintering and self-propagating sintering. The preparation processes of AlN substrate and its influencing factors were expounded.

介绍AlN陶瓷的典型性能和导热机理；讨论AlN粉末的5种合成方法：铝粉直接氮化法、Al2O3碳热还原法、化学气相沉积法、溶胶凝胶法、自蔓延高温合成法和等离子化学合成法；分析AlN烧结助剂的选择和5种烧结工艺：热压烧结、无压烧结、放电等离子烧结、微波烧结及自蔓延烧结；阐述AlN基板的制备工艺及其影响因素。

Results (1) the laminin synthesis was significantly improved by PBMC from nontreatment group (P＜0.05);(2) the 3 H-prolin incorporation was significantl decrease in the GEC treated by PBMC supernatant from nontreatment group(P＜0.05);(3) the supernatant of PBMC from nontreatment group stimulated the collagen Ⅲ synthesis(P＜0.05), while, there was no significant difference of collagen Ⅳ synthesis between 4 groups;(4) the activity of PBMC supernatant have no close relation with urinary protein excretion, pathological type and clinical type.

结果 (1)肾病极期未经激素治疗组PBMC上清明显促进了GEC合成层粘连蛋白；(2)未治PBMC上清抑制了GEC合成总胶原；(3)未治组PBMC上清促进了Ⅲ型前胶原的合成，而对Ⅳ型胶原的合成无明显影响；(4)肾病患儿PBMC的上述作用与是否足量激素治疗有关，而与尿蛋白能否阴转、肾组织病理类型、肾病临床类型等无直线相关关系。

At last,a convergent and general protocol to marine natural product,as demonstrated by the enantioselective total synthesis of malyngamides O,P,Q,R, 5"-epi-Q and 5"-epi-R bearing terminal vinylic chloride structure,was developed in detail.E,(7S)-7-methoxytetradec-4-enoic acid was prepared using the above described Johnson-Clainsen rearrangement,the terminal vinyl chloride was constructed using Wittig reaction as key step,the pyrrolidone derivative was constructed using L-serine as natural chiral pool.Starting from the synthesis of malyngamides O and P to explore the general route,an aldol reaction of methyl acetate with the vinyl chloride part in the presence of LDA gave the skeleton of amine portion,followed by amidation with the fatty acid finished the synthesis of malyngamide P.

先以malyngamides O和P为试点探索通用合成路线，将乙酸甲酯和烯氯部分在LDA存在下进行aldol反应得到氨部分的骨架，再将手性不饱和脂肪酸和氨部分进行酰胺化反应完成了malyngamide P的合成，将P在碱性条件下进行烯醇甲基化反应完成了malyngamide O的全合成。

Industrial synthesis carboxylic acid, the hydrolytic synthesis amide in industry, as well as the method and the process of industrial coholysis synthesis esters.

掌握水解合成酰胺的工业方法。掌握工业醇解合成酯的方法与工艺。

Which can be used as the body of vitamin B1 coenzyme of many enzymes in the normal human body has an important role in glucose metabolism, it can inhibit the activity of cholinesterase, and choline esterase is an important neurotransmitter, and thus nerve conduction impact; vitamin B2 in the organization by participating in a variety of yellow enzymes constitute a coenzyme, its role in bio-oxidation process in the delivery of hydrogen role in regulating the body's metabolism process; vitamin B6 can also be a variety of enzymes as coenzyme participate in all kinds of amino acid metabolism, promote the absorption of amino acids and protein synthesis, cell growth is necessary for the material, which also promote fat metabolism, involved in neurotransmitter synthesis, hemoglobin synthesis and the impact on the normal reproductive functions such as human body an important metabolic process, Volkswagen Medicine Net: What liver protection effect of vitamin B family?

可作为维生素乙许多酶的辅酶，在正常人体组织中有一个用糖代谢的重要作用，能抑制胆碱酯酶活性，和胆碱脂酶是一个重要的神经递质，神经传导，从而影响；由黄色参与各种酶在组织中维生素B2构成辅酶，其作用在生物氧化氢的作用，调节人体的代谢过程中产程；维生素B6也可以是作为辅酶参与氨基酸代谢的各种酶的品种，促进氨基酸的吸收和蛋白质合成，细胞生长是必要的材料，这也促进脂肪代谢的神经递质合成，血红蛋白合成和参与，如影响人体生殖功能的正常新陈代谢过程中一个重要的，（大众医药网：什么样的维生素B家庭肝脏的保护作用？

Different contribution of the genes to starch biosynthesisLeaves and developing endosperms of Q319, C7-2, q404, ZN-A and S8 were used to study the expression patterns of 44 genes participating in starch synthesis. We found that ZmGBSSⅠ、ZmSSⅢ、ZmSBEⅡb、ZmBT2-2、ZmSh2-2、ZmSh2-3、ZmBT1 were expressed exclusively in the metaphase and anaphase of developing endosperm, and the expression patterns of ZmSUS1、ZmSus1L、ZmSUS3、ZmSSⅠ、ZmSSⅡa、ZmSBEⅠ、ZmISO1、ZmPul were consistent with the process of starch synthesis in the endosperm, while ZmUGP3 and ZmSUT2 were highly-expressed in all samples, suggesting that these genes perhaps devoted to starch synthesis in endosperm.

淀粉生物合成基因的不同贡献以Q319、C7-2、q404、ZN-A和S8自交系的幼叶、成熟叶、成熟子房、授粉后1d、5d、10d的种子和15d、20d、25d的胚乳为材料，研究了参与淀粉合成的44个基因的表达模式，研究发现ZmGBSSⅠ、ZmSSⅢ、ZmSBEⅡb、ZmBT2-2、ZmSh2-2、ZmSh2-3、ZmBT1在胚乳发育中后期特异性表达，ZmSUS1、ZmSus1L、ZmSUS3、ZmSSⅠ、ZmSSⅡa、ZmSBEⅠ、ZmISO1、ZmPul的表达在淀粉合成期显著上调，ZmUGP3和ZmSUT2在所有组织中高水平表达，说明这些基因可能主要负责胚乳淀粉的生物合成。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失