查询词典 alkane

The soluble tetra-alkyl phthalocyanine compounds have the following general structure, wherein Rn represents straight-chain or branching chain alkane, n represents the number of straight-chain or branching chain alkane, M represents center ligand of bivalence or more, L represents axial ligand, X represents the number of L.

该可溶性四烷基酞菁化合物符合如下结构通式：结构通式中，Rn代表直链或支化链的烷烃，n代表直链或支化链的烷烃的数目，M代表二价或二价以上的中心配体，L代表轴向配体，X代表L的数目。

Based on the characteristics of molecular structure, the adjacent matrix and dyeing matrix were used to characterize the molecular structure of alkane and cycloalkane, a new method——the group contribu-tion method, was developed to calculate the boiling points of alkane and cycloalkanes from molecular struc-ture.

根据分子结构的特点，通过用邻接矩阵和染色矩阵表征分子结构，发展一种根据分子结构信息计算烷烃和环烷烃沸点的新方法——基团贡献法。

After the decarboxylation process the alkane produced can be degraded or "cracked"=to lower carbon number alkane s.

脱羧基作用后，所形成的烷烃能被降解或"裂解"成低碳数烷烃。

Paraffin consists of n-alkane,short p-alkane,naphthene and aromatic, minimal amount of compounds containing elements S,N,O.

石蜡主要是由正构烷烃组成，还有较少的异构烷烃、环烷烃和芳烃，以及含微量S、N、O的化合物。

The reaction performance of Pt-Sn-Li/Al_2O3/FeCrAl catalyst was measured,and the properties of the catalyst were characterized.It was found that reaction temperature,LHSV and the molar ratio of hydrogen to alkane have greatly affected on the catalytic performance of the Pt-Sn-Li/Al_2O_3/FeCrAl catalyst.Under a set of optimal reaction conditions,at 0.1 MPa,470℃,the molar ratio of hydrogen to alkane of 4 and LHSV of 0.14 mL·m~(-2)·h~(-1),the dodecane conversion is 6%,and the dodecene selectivity is about 72%.

结果表明：工业催化剂的催化性能比至今实验室制备的γ-Al_2O_3和SBA-15颗粒负载型颗粒状催化剂的性能好；反应温度、液时空速和氢烃摩尔比对Pt-Sn-Li/Al_2O_3/FeCrAl金属基整体式催化剂脱氢性能都有重要影响，最适宜的反应条件是压力为0.1 MPa，反应温度为470℃，进料氢烃摩尔比为4和LHSV为0.14 mL·m~(-2)·h~(-1)，此时十二烷的转化率约为6%，十二烯的选择性约为72%；活性组分涂层与金属基体结合良好。

This paper demonstrates distribution features and geochemical significance of biomarker in Tangyuan Depression and crude oil,and indicates that,abundant n-alkane,isoprenoid-n-alkane,terpenoid and steride are tested in Tangyuan Depression .

主要论述了汤原断陷生物标志化合物及原油生物标志化合物的分布特征及其地球化学意义，指出汤原断陷内检出丰富的正烷烃、类异戊二烯烷烃、萜类化合物及甾类化合物。

A part of microbial cells would autolyzed to release the intercellular alkanedegrading enzymes when they were cultured on alkane. Thus alkane could be degraded and synthesized alkane derivative with surface activity extracellularly. This surface-active agent would improve alkane emulsifying, and those unautolyzed cells could utilize the emulsified alkane sequentially.

微生物细胞在烃类基质中培养时，为了适应其疏水性环境以更好地摄取烷烃，会通过一部分细胞的自溶解体而使得胞内烃类代谢酶等释放，这样烃类在胞外被代谢生成具有表面活性的烷烃衍生物，该表面活性产物将促进烃类的乳化，使得剩余的未自溶解体的细胞可以借助生物表面活性剂而摄取降解烃类。

Methods:to consider sugarcane total alkane alcoholas effective part objective, total alkane alcohol and octacosanol as investigation index,determine contentby gas chromatography method,learn the contribution of different factors to extraction of sugarcane wax with orthogonal design.

以甘蔗滓总烷醇为药材有效部位目标产物，并以总烷醇及二十八烷醇为主要考察指标，用气相色谱法进行含量测定，采用正交设计法，得出不同因素对提取甘蔗烷醇的影响程度。

The washing experiment of soil contaminated by petroleum alkane was performed with two kinds of biosurfactants in laboratory. The results showed that biosurfactant would enhance on removal of residual alkane in soil, after washing with 20 pore volume solution the removal rate with BS-UC and MELs were three times and twice as that of water, respectively.

在实验室内对南极假丝酵母产生的两种生物表面活性剂进行了石油烃类污染土壤的冲洗实验，结果表明，经过大约20个孔隙体积的冲洗，BS-UC溶液的除油率为清水的三倍，MEL溶液为清水的两倍，这表明该生物表面活性剂能够加速土壤残油的去除，而来自污染底物的生物表面活性剂更具有优越性。

The phosphines such as 〓, dppm bis(diphenylphosphinemethane, dppebis(diphenylphineethane and dppp bis(diphenylphosphinrpropaneare chosen for study. The chloro alkane, bromide alkane and acetone arechosen as solvents.

选择有机单膦〓和双膦配体dppm二(二苯基膦甲烷、dppe二(二苯基膦乙烷、dppp二(二苯基膦乙烷与〓反应，选择氯代烷、溴代烷和丙酮为反应溶剂。

This is not an ordinary box, which is used as a background picture of the dialog box, very pretty.

详细说明：这可不是一个一般的对话框，它是用图片作为背景的对话框，非常好看。

Conceal me what I am,and be my aid for such disguise as haply shall become the form of my intent.

遮掩我的身份，帮助我，我的面具将成为我的目的。