酸基
- 与 酸基 相关的网络例句 [注:此内容来源于网络,仅供参考]
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The present invention relates to a coating composition comprising; A at least one polyester oligomer prepared from reactants comprising a 20 60 wt.% of at least one polyol, b 5 30 wt.% of at least one polycarboxylic acid selected from the group of cyclic polycarboxylic acids, the esters or the anhydrides thereof, wherein the carboxyl groups are separated by 3 carbon atoms or less, and from the group of alpha , beta -saturated acyclic polycarboxylic acids, the esters or the anhydrides thereof, and c 20 60 wt % of at least one monocarboxylic acid, the sum of the wt.% indicated for the reactants,, and always being 100 wt.%, and the oligomer being a low-viscosity oligomer having a weight average molecular weight Mw of less than 5,000, and a hydroxyl number in the range of about 200 to about 400 mg KOH/g oligomer, and B at least one polyisocyanate.
本发明涉及一种包含如下组分的涂料组合物:A至少一种由包含如下成分的反应物制备的聚酯低聚物:a20-60wt%至少一种多元醇,b5-30wt%至少一种选自其中羧基被3个或更少碳原子隔开的环状多元羧酸、其酯或酸酐以及选自α,β-饱和的无环多元羧酸、其酯或酸酐的多元羧酸,以及c20-60wt%至少一种一元羧酸,其中反应物、和的wt%之和总是为100wt%,所述低聚物是重均分子量Mw低于5000且羟基值为约200-约400mg KOH/g低聚物的低粘度低聚物,以及B至少一种多异氰酸酯。
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The present invention relates to compounds of formula wherein R is hydrogen, lower alkyl, lower alkoxy, halogen or lower alkyl substituted by halogen; R is hydrogen or halogen; or R and R are together with the carbon atom to which they are attached -CH=CH-CH=CH-; R is hydrogen, lower alkyl, phenyl optionally substituted by halogen, or is hetaryl, optionally substituted by lower alkyl; R is hydrogen, lower alkyl, phenyl, benzyl, lower alkenyl, lower alkoxy, phenyloxy, benzyloxy, S-lower alkyl, halogen, CN, lower alkyl substituted by halogen or O-lower alkyl substituted by halogen; R is hydrogen or lower alkyl, aryl is phenyl or naphthyl; n is 1, 2 or 3; m is 1 or 2; and pharmaceutically acceptable acid addition salts and tautomeric forms thereof.
本发明涉及式化合物及其可药用的酸加成盐和互变异构形式,其中R 1 是氢、低级烷基、低级烷氧基、卤素或被卤素取代的低级烷基;R是氢或卤素;或R 1 和R与它们连接的碳原子一起是-CH=CH-CH=CH-;R 2 是氢、低级烷基、任选被卤素取代的苯基或者是任选被低级烷基取代的杂芳基;R 3 是氢、低级烷基、苯基、苄基、低级链烯基、低级烷氧基、苯氧基、苄氧基、S-低级烷基、卤素、CN、被卤素取代的低级烷基或被卤素取代的O-低级烷基;R 4 是氢或低级烷基,芳基是苯基或萘基;n是1、2或3;m是1或2。
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Professional sales companies operating bromide products: sodium bromide, sodium bromide, potassium bromide, potassium bromate, Tetrabromobisphenol A, Deca-BDE, ten PBDEs, DBDPE, hexabromodiphenyl Central dodecane, dibromo neopentyl glycol, neopentyl bromide three alcohols, three bromine phenol, octabromodiphenyl ether, brominated polystyrene, bromide, calcium bromide, dibromo succinic acid, dibromo-D ene glycol, bromide surfactants series: Dodecyl trimethyl ammonium bromide, tetradecyl trimethyl ammonium bromide, cetyltrimethyl ammonium bromide, octadecyl trimethyl ammonium bromide dodecyl trimethyl ammonium chloride, tetradecyl trimethyl ammonium chloride, cetyl trimethyl ammonium chloride, octadecyl trimethyl ammonium chloride, tetrabutyl ammonium bromide wholesale sales: dimethylolpropionic acid, DL-malic acid, isophthalic acid PIA, glycolic acid, adipic acid.
公司专业经营销售溴化物系列产品:溴化钠、溴酸钠、溴化钾、溴酸钾、四溴双酚A、十溴二苯醚、十溴联苯醚、十溴二苯乙烷、六溴环十二烷、二溴新戊二醇、三溴新戊醇、三溴苯酚、八溴醚、溴化聚苯乙烯、溴化铵、溴化钙、二溴丁二酸、二溴丁烯二醇、溴化表面活性剂系列:十二烷基三甲基溴化铵、十四烷基三甲基溴化铵、十六烷基三甲基溴化铵、十八烷基三甲基溴化铵、十二烷基三甲基氯化铵、十四烷基三甲基氯化铵、十六烷基三甲基氯化铵、十八烷基三甲基氯化铵、四丁基溴化铵批发销售:二羟甲基丙酸、DL-苹果酸、间苯二甲酸 PIA、羟基乙酸、己二酸。
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Alanine, glycine and glutamine, and present weak resonances of creatinine also; diabetes mellitus patients show hyperglycorrhachia and strong resonances for ketone bodies and glycine; patients with benign prostatic hypertrophy or urethral stone have high levels of creatinine; the genital tumor females can be distinguished with low pyruvate levels on the bases of /sup 1/H-NMR spectra.
以下乃是由上述样品族群之氢光谱所得之结论;孕妇的脑脊髓液具有低浓度的脊髓糖;胺基酸(如丙氨酸;麸氨酸和甘氨酸)和肌酸酐;有酮体生成,糖尿病患的脊髓液在氢核光谱显示高浓度的脊髓糖,另外有丙酮酸;乙醯乙酸盐和甘氨酸的强烈共振讯号,而具摄护腺肥大症或是尿道结石的病患,具有高浓度的肌酸酐在其CSF的氢光谱中。
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Water, C12-20 acid PEG-8 ester, hydrogenated polysobutene, petrolatum, dicaprylyl maleate, hydrogenated vegetable oil, propylene glycol, acetylated lancolin, glycoprrotiens,panax ginseng root extract,equisetum arvense extract, carbomer, butyrospermum parkill fruit, potassium cetyl phosphate, triethanolamine, hypericum perforatum extract, malva sylvestris extract, methylparaben, glycerin, urea, saccharide hydrolysate, magnesium aspartate, glycine, alanine, creatine, propylparaben, ethlparaben, imidazolidinyl urea, polyperfluoromethylisopropyl ether, fragrance
水,C12-20 酸 PEG-8酯,氢化聚异丁烯,凡士林,马来酸二辛酯,氢化植物油,丙二醇,乙醯化羊毛脂,糖蛋白,人参根萃取,问荆萃取,卡波姆,乳木果,鲸蜡醇磷酸酯钾,三乙醇胺,金丝桃萃取,锦葵萃取,羟苯甲酯,甘油,尿素,水解糖,天门冬酸镁,甘氨酸,丙氨酸,肌酸,羟苯丙酯,羟苯乙酯,尿素醛,聚全氟甲基异丙基醚,香料
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In this study, new benzo[l,2,3]thiadiazole derivatives were designed according to relationship of structure and efficacy. The 9 novel compounds were synsthesized with following reactions. The chlorine atom in 2-chloro-3,5-dinitro-benzoic acid as beginning raw material was substituted by 2-methylpropane-2-thiol, esterified then with bromoethane, reduced by iron powder and cyclized to obtain ethyl benzo[l,2,3]thiadiazole-7 after diazonation reation.
本论文根据苯并噻二唑诱导剂的构效关系设计了新的苯并噻二唑的结构,并合成了9个未见文献报道的化合物,合成步骤如下:采用2-氯-3,5-二硝基苯甲酸为起始原料,苯环上的氯原子被叔丁基硫醇置换,羧酸由溴乙烷酯化,硝基由铁粉还原,随后经重氮化关环生成苯并[1,2,3]噻二唑-7-羧酸乙酯。
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Benzoyl chloride was treated with potassium selenocyanate in dichioromethane by using polyethylene glycal-400 as the solid-liquid phase transfer catalyst to yield the corresponding benzoyl isoselenocyanate. This intermediate did not need to be isolated and directly reacted with arylamines, affording the N-benzoyl-N'-arylselenoureas 2a~2p. These compounds were characterized by IR, 1H NMR spectra and elemental analysis and the single crystal structure of 2k has been confirmed by X-ray crystallographic analysis.
以PEG-400为固液相转移催化剂,通过苯甲酰氯与硒氰酸钾反应合成了中间体苯甲酰基异硒氰酸酯,该中间体不需分离,直接与芳胺反应,得到N-苯甲酰基-N'-芳基硒脲(2a~2p),这些化合物用1H NMR,IR及元素分析进行了表徵,并用X射线单晶衍射确定了化合物2k的单晶结构。
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In addition to the two axial ligations provided by His18 and Met80, the hydrogen bond and hydrophobic interactions between the heme and the protein polypeptide, the heme also covalently linked to the protein matrix through two thioether bonds which are formed between vinyl groups of the heme and cysteine residues of a classic Cys-Xaa-Xaa-Cys-His heme-binding motif of the polypeptide chain.
Cyt c是血红素蛋白中电子传递蛋白的典型代表,其辅基heme与蛋白肽链的结合除了来自heme轴向配体组氨酸(His18)和甲硫氨酸(Met80)的配位作用、氢键和疏水相互作用等非共价键作用方式外,血红辅基heme的两个乙烯基还与蛋白肽链上的结构片段域Cys-Xaa-Xaa-Cys-His中的两个半胱氨酸形成硫醚键以共价键方式相结合。
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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。
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By cloning and sequencing those DNA fragments with polymorphisms we found 3 SNPs, they were as following: T→C in exon 3, G→C in introns 5,A→C in exon 6, in which A→C in exon 6 was non-synonymous substitution, it resulting in Thr→Arg.
对有多态的位点进行克隆测序,结果发现:外显子3中的一处碱基由T→C,是同义突变;内含子5中的一处碱基由G→C;外显子6中的一处碱基由A→C,是错义突变,导致苏氨酸变成精氨酸。
- 推荐网络例句
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We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.
索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称;三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起,称之为挽歌体诗人或者史诗诗人,他们被称为诗人,似乎只是因为遵守格律写作,而非他们作品的模仿本质。
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The relationship between communicative competence and grammar teaching should be that of the ends and the means.
交际能力和语法的关系应该是目标与途径的关系。
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This is not paper type of business,it's people business,with such huge money involved.
这不是纸上谈兵式的交易,这是人与人的业务,而且涉及金额巨大。