wán
  • alkane
烷
[wán]
  • 有机化学中,分子式可以用CnH2n+2表示的一类化合物:甲~(沼气、天然气的主要成分)。乙~。丙~。

  1. 有机的同源同期的甲烷及其同系物的δ~(13)C值随烷烃气分子中碳数增加而增大;

    The δ ~ ( 13 ) C values of synchronous and isogenous methane and its homologues increase with the increasing of carbon number of alkane gas molecules .

  2. 提高AEO9/醇/烷/水体系反相微乳液陶瓷墨水浓度的研究

    Enhancement of Solid Content in AEO_9 / Alcohol / Alkane / Water Reverse Microemulsion Ceramic Inks

  3. 事实上还不知道芳香族化合物的直接烷氧基化的方法。

    Direct alkoxylation of aromatic compounds is virtually unknown .

  4. 这些衍生物可以容易地在碱性条件下通过2-巯基吡啶和卤代烷的烷基化而得到。

    These derivatives are readily obtained by alkylation of2-mercaptopyridine and alkyl halides under alkaline conditions .

  5. 二恶烷可能致癌。

    1,4-dioxane is likely to cause cancer .

  6. 黄烷胶很重要,因为它比古尔胶在较高温度时更稳定。

    The xanthan gum is important because it has higher temperature stability than guar gum .

  7. 烷是非极性的。

    The alkanes are non-polar .

  8. 噻氯匹啶对脑血栓病人的血栓烷B2的抑制

    Inhibition of Ticlopidine to Thromboxane B_2 in Cerebral Thrombosis

  9. 以丁二酸和甲胺水溶液为原料,先合成N甲基丁二酰亚胺,再经电解还原得N甲基2吡咯烷酮。

    First , N methyl succinimide are synthesized from succinic acidand methylamine .

  10. 脑梗塞患者血浆血栓烷B2与11-去氢-血栓烷B2的对比研究

    Comparative Studies on Plasma Thromboxane B_2 and 11-dehydro thromboxane B_2 in Patients with Cerebral Infarction

  11. 孕烷X受体基因位点与炎症性肠病的易感性相关

    The Pregnane X Receptor Locus Is Associated with Susceptibility to Inflammatory Bowel Disease

  12. 从甘蔗渣中超临界CO2萃取二十八烷醇的研究

    Study on Supercritical CO_2 Extraction of Policosanol from Bagasse

  13. 长链烷氧基取代金属卟啉/H2O2体系催化烯烃环氧化反应研究

    Epoxidation of styrene with hydrogen peroxide catalyzed by long chain alkoxyl-substituted metalloporphyrins

  14. 方法以2,6二甲基苯胺为起始原料,经氯乙酰氯N酰化反应和2吡咯烷酮的N烷基化反应合成了奈非西坦。

    METHOD Nefiracetam was synthesized by N acylation of2,6 dimethylbenzenamine with chloroacetylchloride and N alkylation of2 pyrrolidone .

  15. 烷醇胺水溶液的CO2吸收机理及其腐蚀行为的相关性研究

    Study on the correlation between co_2 absorption mechanisms and corrosion behavior of alkanolamine solutions

  16. 用HPLC法测定6-氨基青霉烷酸色谱条件的探索

    Developing the Analytical Methods of 6-Amino Penicillanic Acid by HPLC

  17. H2S和CO2在烷醇胺水溶液中的溶解度

    Solubility of H_2S and CO_2 in Water Solutions of Alkanolamine

  18. 而黄烷醇含量差异不大(P0.01);

    Contents of flavanol were almost equivalent ( P0.01 ) .

  19. N,N-二(N-亚甲基-2-吡咯烷酮)甘氨(C(12)H(19)N3O4)的结构及配位性能的研究

    Study on structure and coordination properties of n , n bis ( n methylene 2 pyrrolidone ) glycine

  20. 与一般小分子液体不同,正构烷的B/A~2值不是一个常数,在C9处有一转折。

    Differed from the liquids formed by general small molecules , the value B / A ~ 2 of normal alkanes is not a constant .

  21. 三十烷醇在GA3影响水稻幼苗生长和生理性状中的增效作用

    Enhancement of Triacontanol to GA 3 in Influencing the Growth and Physiological Characteristics of Rice Seedling

  22. 内毒素对呼吸道上皮分泌内皮素、血栓烷素、前列腺素E2的影响及氧自由基的介导作用

    Oxygen Free Radicals mediated Secretion of Endothelin , Thromboxane and Prostaglandin E 2 induced by Endotoxin in Cultured Airway Epithelial Cells

  23. 通过C(27)/C(29)甾烷和有机碳同位素来判断早古生代和前寒武纪的烃源岩的生物来源

    Biological origin of Early Palaeozoic and Precambrian hydrocarbon source rocks based on c_ ( 27 ) / c_ ( 29 ) sterane ratio and organic carbon isotope

  24. 采用硅醚化试剂衍生的方法,以正二十烷为内标,GC法同时测定大蜜丸中果糖和葡萄糖的含量。

    This paper describes a GC method to measure simultaneously fructose and glucose content in Da Mi Wan .

  25. REOx和MOX掺杂的ZrO2催化剂催化羟乙基吡咯烷酮脱水反应研究

    Catalytic Dehydration of N - ( Hydroxylethyl ) pyrrolidone on REO_x and MO_x Doped NnanoZrO_2 Catalysts

  26. 通过对改性后树脂进行FT-IR和DSC表征,探讨了有机硅氧烷改性丙烯酸树脂的反应机理。

    The reaction mechanism of acrylic resin modified with organic siloxane was studied by FT-IR , DSC and characterization .

  27. 在DSC曲线上可以看出随着端基取代烷链的增长,熔点逐渐降低。

    It can be seen from the DSC trace that with the growth of alkyl chains , the melting point decreases .

  28. 藿烷具较强的抗生物降解能力,在生物降解的早期阶段其浓度增加(PM级1-3),到严重降解时其含量才降低。

    Hopanes are slightly more resistant to biodegradation and their concentrations increase at early stages of biodegradation ( PM level 1-3 ) .

  29. 同时总结出烷基取代对吡咯烷酮的影响及吡咯烷酮对烷基化学位移的影响的~(13)C谱两组经验取代参数。

    The alkyl substituent empirical parameters for the calculation of pyrrolidone ( 13 ) C chemical shifts and the pyrrolidone substituent empirical parameters for the alkyl ( 13 ) C δ values were obtained .

  30. 在烃类的热解气相色谱中,使用氧化铝色谱柱和TCD/FID串联的双检测器系统,在一次进样之后,可同时检测出热解产物中的氢和C1~C6烷烯烃。

    In pyrolysis gas chromatography an alumina column and TCD / FID detectors in series are used . H2 and C1 - C6 hydrocarbons in the pyrolysis products can be simultaneously measured for one sample input .