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Acetamide and thiouera had the parallel effect with GdnCl on the renaturation of lysozyme , both of them were able to prevent the aggregation of peptide, and at the high concentration they were able to restrain the refolding of peptide , but the structure of lysozyme under experiment condition could not be destroyed by them.

乙酰胺和硫脲则起着和盐酸胍近似的作用,能够抑制肽链间的聚集和肽链内的折叠,但是两者在本实验浓度内不能使溶菌酶变性。

Methods:Celiac injection of Acetamide hyposulfite 300mg/for 2days to rat was used as an animal model of hepatorenal syndrome.

给大鼠腹腔注射硫代乙酰胺300mg/,共2天,制造肝肾综合征模型。测定大鼠血中ALT/GPT、CRE、UREA、TBL、NO、内毒素、ET及ATⅡ的量。同时测定16h尿量,并计算肌酐清除率。

Fourth new aryl acyl ureas of triazole, tetrazole and thiodiazole have been synthesized.

合成了30个新的含三唑、四唑和噻二唑的芳酰基硫脲类化合物。

The present invention relates to a process for rapid solution synthesis of a peptide, the process comprising repetitive cycles of steps-: a coupling step, using an excess of an activated carboxylic component to acylate an amino component, a quenching step in which a scavenger is used to remove residual activated carboxylic functions, wherein the scavenger may also be used for deprotection of the growing peptide, one or more aqueous extractions and optionally, a separate deprotection step, followed by one or more aqueous extractions, characterised in that the process comprises at least one step, referred to as step, in which an amine or a thiol comprising a free anion or a latent anion is used as a scavenger of residual activated carboxylic functions.

本发明涉及快速溶液合成肽的方法,该方法包括步骤-的重复循环:偶联步骤,使用过量的活化羧基成分酰化氨基成分,淬灭步骤,在该步骤中使用清除剂除去残余的活化羧基官能团,其中该清除剂还可以用于使生长中的肽去保护,一或多个水抽提和任选地,独立的去保护步骤,之后进行一或多次水抽提,其特征在于该方法包括至少一个步骤,称作步骤,在该步骤中包含自由阴离子或潜阴离子的胺或硫醇用作残余活化羧基官能团的清除剂。

Then Doripenem came into the market in the July ,2005. We studied the synthesis of Doripemen.Firstly, we synthesized the chemical 2 from the starting material------o-hydroxylphenylacylamine through Reformastky reaction, alkylation, Diekmann reaction, enolization, esterification and etc. Secondly, we synthesized the chemical 3 from L — hydroxylproline through the protection of carboxyl, amidogen and hydroxyl group, reduction by NaBr, SN_2 substitution and Mitsumobu reaction.

我们以水杨酰胺为起始原料,经Reformatsky反应、烷基化、Diekmann环合、烯醇化、酯化等反应合成双环母核2;再从L-羟基脯氨酸出发,经酯化保护羧基、保护氨基、保护羟基、硼氢化还原酯得醇、Sn2取代和Mitsumobu反应等合成巯基侧链3;最后由化合物3经脱保护、水解得硫醇,和化合物2在二异丙基乙基胺的作用下缩合,最后Pd/C催化脱保护,历经16步反应最终得到产物多尼培南。

Wedgeplug O-Seal plug valves with their positive, no-leak features are not only recommended as the best general purpose valves for handling hydrocarbons, vegetable oils, solvents, etc., but are ideal for such tough service as butane, propane, butadiene, acetone, ethyl alcohol, ammonia, anhydrous ammonia, benzene, vinyl chloride, dry chlorine, Dowtherm, ethane, ethylene, hydrogen chloride, napthalene, oxygen, hydrogen, phthalic anhydride, dry phosgene, phosphoric acid, potassium carbonate, styrene, molten sulphur, sulphur dichloride and related services within a temperature range from -300oF to + 450oF within pressure limits of the valves.

楔塞O形密封旋塞阀具有积极的、无泄漏特性,不但是最好的通用的阀门,用于处理碳化氢,植物油,溶剂等,还特别适用于严酷的应用环境,如丁烷,丙烷,丁二烯,丙酮,乙醇,氨,无水氨,苯,氯乙烯,干氯,道氏热载体,乙烷,乙烯,氯化氢,萘,氧,氢,邻苯二甲酸酐,干碳酰氯,磷酸,碳酸钾,苯乙烯,融化硫,二氯化硫,以及温度在-184oC至232oC之间,压力在阀门额定压力等级范围内的有关应用。

The results showed 3 types of aluminum compound prepared in this paper all had good poison protection effectiveness on such impurities as stannous chloride,lead oxide,sodium hydrogen sulfate,and so on.Moreover,the mechanism of the poison of catalyst was also discussed.

结果表明,合成的3种防中毒剂即防-1、防-2(主要成分为乙酰丙酮合铝)及防-3(主要成分为二乙酰丙酮基异丙氧基铝)对二月桂酸二丁基锡、氯化亚锡、二正丁胺、硫脲、氧化铅及硫酸氢钠等杂质均有较好的防中毒作用;不同防中毒剂对不同杂质的防中毒作用有一定的选择性。

Preferably, at least one member selected from among heterocyclic compounds having any of hydroxyl, carbonyl, carboxyl, amino, amido and sulfinyl and containing at least either a nitrogen or a sulfur atom is contained in the polishing solution.

优选其中包含杂环化合物,所述杂环化合物含有羟基、羰基、羧基、氨基、酰胺基和亚磺酰基中的任1种,且含有氮和硫原子中的至少1种。

Five expressed genes contributed to the flowering process and embryonic development such as prolamine, gene for allergenic protein, chalcone synthase, putative peptide methionine sulfoxide reductase and acyl carrier protein Ⅱ gene were chosen to hybridize with a 1510-RNA-blot (time-point phenotypes) array. The 1510 RNA blots were prepared into an RNA array for the purpose of conferring and validating global transcriptional profiles on booting, flowering and filling quantitatively and qualitatively at a statistic level. The results verified: Prolamine and allergenic protein were high-expressed in filling grains after being regulated by development, Chalcone synthase and methionine sulfoxide reductase were high-expressed in the leavies induced by light, in the root stressed for nitrogen deficiency.

为了全局性分析基因表达谱以及进一步验证它们与开花过程的相关性,选取参与水稻开花过程和胚胎发育过程的基因:查尔酮合酶、酰基载体蛋白Ⅱ、醇溶蛋白、S-腺苷基甲硫氨酸还原酶、过敏反应蛋白等为探针,与1500个水稻RNA斑点阵列进行杂交时,结果证实:醇溶蛋白和过敏反应蛋白受发育调节在乳熟成穗中高表达,查尔酮合酶和S-腺苷基甲硫氨酸还原酶在叶片中受光诱导、在根中受缺氮胁迫高表达。

X 6.36(3)? is formed.Liquid-liquid extraction experiments, between twelve heterocyclic thioalkoxycalix[4]arene on the lower rim, fifteen heterocyclic thioacetamidecalix[4]arene on the upper rim and Na~+、K~+、Cs~+、Mg~(2+)、Cu~(2+)、Co~(2+)、Cd~(2+)、Ni~(2+)、Pb~(2+)、Hg~(2+) and Ag~+ picrates, have been carried out and their results are compared.

分别将十二个下沿含有杂环硫烷氧基杯芳烃衍生物和十五个上沿含有杂环硫乙酰胺基的杯芳烃衍生物与Na~+、K~+、Cs~+、Mg~(2+)、Cu~(2+)、Co~(2+)、Cd~(2+)、Ni~(2+)、Pb~(2+)、Hg~(2+)和Ag~+的十一种苦味酸盐进行了离子萃取实验,并对两类衍生物与不用金属离子的萃取能力进行了分析和比较。

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