• 、硫代甲酰胺格氏试剂合成了取二芳基

    One-pot synthesis method of diarylmethylamines was investigated using aryl lithium salt, thioformamide and aryl Grignard reagent.

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  • 本文认为,“天书”是产生于新石器代甲古文更原始图画会意文字,称古图形文字,应该一则古时的“公告”。

    This paper thinks "the Red Cliff a Book from Heaven" produced New Stone Age, it was ancienter than inscriptions on bones or tortoise shells of Shang Dynasty.

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  • 下周回归星球大战克隆人战争》在视觉上将巨大改变因为克隆人士兵穿上我们西斯复仇》中见到他们所穿的

    Star Wars: the Clone Wars returns next week with a big visual change, as the Clone Troopers transition into the Phase 2 armor we saw them wearing in Revenge of the Sith.

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  • 目的为了有效控制乙型肝炎病毒感染和发病,提高下一人群免疫力

    Objective To control the infections and morbidities of hepatitis A and B and improve the immunity of population of the next generation.

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  • 方法:2氨基45氧基为原料,分别经过化、氯等反应,合成五种目标化合物。

    The five quinazoline compounds were prepared by using 2 amino 4,5 dimethoxy benzoic acid as original material, which underwent ring closing, halogenation and substitution.

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  • 草胺草胺均乙酰胺类除草剂它们水田中活性极高

    Metolachlor and acetochlor are belong to acetanilide herbicides, they have high activity in rice field.

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  • 研究十六烷基存在下8-羟基喹啉-5-磺酸络合反应

    The reaction of gallium with 8-hydroxyquinoline 5 sulfonic acid in presence of CTMAB has been studied.

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  • 新的17-的19-去甾醇类,制备方法中间体,它们作为药物以及含有它们的药物组合物

    Novel 17-halogenated 19-Nor steroids, method and intermediates for preparing same, use as medicines and pharmaceutical compositions containing same.

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  • 目的了解去万古霉素脑膜炎模型中的脑脊液透过率其他动力学参数

    Objective it is to investigate the filterability of Norvancomycin in cerebrospinal fluid and other pharmacokinetic indexes in meningitis models of rabbits.

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  • 阿维菌素品系选育42抗性增长8.7酯品系选育至40,抗性增长到68.5倍。

    After 42 and 40 generations selection with abamectin and fenpropathrin, Tetranychus (cinnabarinus) developed 8.7 and 68.5-fold resistance to the two acaricides respectively.

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  • 光解N-氧基偕亚胺化合物高产率获得相应,并转变过程中小影响常见脱水剂卤化敏感官能团

    Photolysis of N-methoxyimidoyl bromides leads to formation of the corresponding nitriles without affecting functional groups sensitive to ordinary dehydrating and halogenating reagents, in high yield.

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  • II(85系列)无色显示包衣标准差低于相同工艺条件下的标准无色羟丙纤维素薄膜包衣

    In this study, Opadry II (85 series) Clear was shown to have lower coating weight gain standard deviations than a standard clear hypromellose based film coating.

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  • 国内个二病例确诊卫生部上周五宣布,中国大陆内出现首个型h1n 1流感病毒传播病例

    First domestic flu case confirmed. The a (H1N1) flu virus has been transmitted on the Chinese mainland for the first time, the Ministry of Health said on Friday.

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  • 相色谱上,乙酰乙酸、乙酰乙酸酯、3-氧在无任何催化剂存在下,发生酯交换反应。

    Gas chromatography(GC) as a chemical reactor, methyl acetoacetate, ethyl acetoacetate, and methyl(3-oxo) pentanoate can undergo transesterfication with various alcohols without any catalyzers.

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  • 草酸加氢催化剂采用了无铬配方性能指标也优于技术。

    In addition a chromium-free formula is applied to prepare new generation dimethyl oxalate hydrogenation catalyst, showing better performance than the former generation catalyst.

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  • 本文介绍中国第二国内通信卫星——东方红二号DFH-2A总体及分系统概貌。

    This paper gives a brief description of the DFH-2A communication satellites which are the second generation of Chinese domestic communication satellites.

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  • 硫酸酯是一种重要化工原料有机合成用于作为基化

    Sulfuric acid dimethyl ester, one of the important chemical raw materials ACTS as the methylating agent in the organic synthesis for the purpose of replacing alkyl halide.

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  • 环己烷乙酯原料经过反应合成了丙烯酸二环己基苯酯。

    With bromocyclohexane and ethyl benzoate as raw materials, dicyclohexylphenylmethyl methacrylate was synthesized by two steps.

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  • 由羊蹄树叶提取叶绿素并经皂化及成盐反应制备叶绿素铜研究探讨了优惠提取工艺条件和反应条件。

    The technology of preparing sodium copper chlorophyllin from Banhinia purpurea linn leaves was studied. The optimum technological condition was found.

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  • 随着20世纪20透明发明,1926年美唯一改变就是简单透明的

    With the invention of clear nail polish in the 1920s, the only change for the 1926 look is just a simple layer of clear lacquer.

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  • 克斯籍此于1970年早期完成了一支半职业队连续几届欧洲冠军转型

    With it, Ajax was transformed from a semi-professional side into consecutive European champions by the early 1970's.

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  • 曲康特比萘芬好的特性,特别是通过口服给药血运达进而渗透进入板,起抑杀真菌效果。

    With the good pharmacokinetic properties of itraconazole and terbinafine, by oral route effective concentration of the two drugs can be obtained in nail bed and then be diffused into nail plate.

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  • 2个完整51个核心系的系谱分析,发现瓣状的遗传特点与常染色体单基因显性性状一致

    Analyzing the data of 51 nuclear families and 2 families with 3 generations, it was found that petaloid toenail had the same hereditary characters as a dominant single-gene trait.

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  • 基因发生表明近几年型流感病毒与90流行存在基因特性不同分支

    The phylogenetic tree showed that in recent years there existed a branch for influenza a virus of genetic characteristic different from that of epidemic strains in 1990s.

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  • 2,4-二羟基酯为原料经过反应水解反应羧反应合成2,4-二氯间苯二酚。

    The compound 2,4-dichlororesorcinol was obtained from the starting material 2,4-dihydroxybenzoate via chlorinated reaction, hydrolysis and decarboxylation.

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  • 液态橡胶、异氟尔酮二异氰酸酯扩链剂3,6 -二硫基-2 ,5 -苯胺为原料,合成了不同硬段质量分数的聚硫硫聚脲。

    A series of polysulfide based thio-polyurea was synthesized, which were based on isophorone diisocyanate, liquid polysulfide and 2,5-diamino-3,6-dimethylmercapto toluene.

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  • 液态橡胶、异氟尔酮二异氰酸酯扩链剂3,6 -二硫基-2 ,5 -苯胺为原料,合成了不同硬段质量分数的聚硫硫聚脲。

    A series of polysulfide based thio-polyurea was synthesized, which were based on isophorone diisocyanate, liquid polysulfide and 2,5-diamino-3,6-dimethylmercapto toluene.

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