查询词典 alkanes

Butyric acid,phenol,indol and polycyclic aromatic hydrocarbons are inferredin the solution phase of leachate by GC,and 53% of organic acids,18% of alcohol andphenols,and 7% of alkanes are detected in leachate by GC-MS.The colloidal structure oflandfill leachate is analyzed by determination ofξ-potential and the interfacial tension,whichprovide the basis to pretreatment by the coagulation and treatment by advanced oxidation.

首先测定了垃圾渗滤液的常规水质因子及污染物含量，并采用GC及GC-MS技术对垃圾渗滤液有机相的微观结构进行了分析，由GC谱图解析推断渗滤液的溶液相中含有丁酸或辛酸、苯酚、吲哚及多环芳烃等有机物；由GC-MS解析可知其有机物主要为有机酸，约占53％，其次醇及酚类约占18％，烷烃约占7％。

Alkylbenzene, normal alkanes and alkylcyclohexane on the pyrolysates of P. Boryanum at 300℃ had uniform distribution and the relative content of them was similar, indicating that they originated from same precursors. Fatty acids, alcohol and ketone in algal cell are the possible precursors. For example, the precursor of relatively abundant C〓 alkylbenzene and alkylbenzene with C〓 side chain perhaps related with palmitic acid. N-alkylnaphthalene in pyrolysates at 300℃ probably derived from alkylation of cleavage products of aromatic steranes and terpanes.

在盘星藻300℃热解产物中，烷基苯、正烷烃和烷基环己烷碳数分布一致、各化合物的相对含量接近，表明它们有相同的来源，藻类体内的脂肪酸、醇和酮及细胞壁等物质可能是其母质，相对含量较高的碳数为16及侧链碳数为16的烷基苯类化合物，其前身物可能与软脂酸有关。300℃热解产物中的正烷基萘类化合物，可能由芳香甾、萜类的降解产物与直链烃类加成烷基化而形成。

Molecular topological research has been applied to corrlelate hydrogen connectivity indices of 34 alkanes in naphthas and the chromatographic retention index in the gas chromotography.

通过计算石脑油中 34种烷烃的氢连接性指数，用多元线性回归将它与毛细管气相色谱保留指数进行关联分析获得良好的相关性，相关系数R为 0 。990 0 ，标准偏差 s为 15 。2 4 。

An experiment to calculate the fecal recoveries of alkanes was carried out at the Inner Mongolia Grassland Ecosystem Research Station of the Chinese Academy of Sciences in autumn 2004. Twelve wethers (Inner Mongolia fine wool sheep×Inner Mongolia sheep) selected from a group of two year olds were fed fresh mixtures of Leymus chinensis (30%), Cleistogenes squarrosa (20%) and Artemisia frigida (50%) in known proportions and amounts for 14 days.

2004年秋季在中国科学院内蒙古草原生态系统定位站，用不同放牧演替阶段的优势植物羊草、糙隐子草和冷蒿分别按30%、20%和50%的比例混合组成日粮，饲喂12只(39±2.1kg)2岁羯羊。

The main components were terpenoid, alkanes, ester, acid and alcohol compounds.

含量较多的是萜类化合物、烷烃类物质、酯类化合物、酸类化合物和醇类化合物。

The results showed that 42 compounds were identified from perianth at 5 stages, including 18 terpenoid compounds, 7 ester compounds, 4 alcohol compounds, 1 ketone compound, 11 alkanes compounds and 1 unknown compound.

结果表明，5个时期的含笑花被片共鉴定出42种化学成分：萜类化合物18种、酯类化合物7种、醇类化合物4种、酮类化合物1种、烷烃类物质11种和未知物1种。

The total content of alkanes and aromatics were up to 60.01% 57.86% for poplar leaves and birch leaves with H/C molar ratio 1.79 and 1.89, O/C molar ratio 0.035 and 0.036, and HHV 45.47 MJ·kg~（-1）and 46.03 MJ·kg~（-1）These data shows that the oil from leaves was very similar to petroleum.

树皮样品所得油中碳氢化合物成分总含量有所降低，油的热值也有所降低，大体在40MJ·kg~(-1)左右，但是在树皮所得油中出现了大量的酚类物质，百分含量在40%左右。

The three pure component parameters for alkanes were determined by fitting the saturated vapor pressure and liquid density data, near linear relations were observed between the parameter values and the carbon number.

由拟合正构烷烃的饱和蒸汽压和液相密度所确定的三个纯组分参数与烃的碳原子数呈良好的线性关系。

On the other hand, the synergetic effect could be found during BS-UC adding to mixed alkanes culture. Furthermore, BS-UC could increase the hydrophobicity of cell surface and thus enhanced the ability of cell attachment to alkane. Adding BS-UC also increased the Zeta-potential of cell and medium surfaces significantly, i. e. BS-UC could decreased the negative electric charge density of their surface, so the repulsive tension between cell and medium would be weakened and the adsorption of them would be easier. The results of the test with sand filled column for investigating the cell adsorption in pore-medium showed that the residual amount of cell in the column increased with increase of adding BS-UC concentration.

此外，在以混合烃类为底物时会产生一定的协同促进效应；添加生物表面活性剂BS-UC，可以显著提高细胞表面疏水性，使得其与烃类及其它疏水表面接触能力增强；BS-UC还可以明显提高细胞及介质表面的ζ电位，使所带负电荷密度降低，从而使得两者间斥力减小而便于吸附；通过沙填充柱洗脱实验，对BS-UC增强细胞在填充介质中吸附能力进行了考察发现，随BS-UC浓度的增加，细胞在填充介质中的保留量也随之增加。

Information of group property and connectivity in molecules was contained in the model and 16 group bonds were used as input parameters of neural networks to study the correlation of molecular structures with flashpoints of 44 alkanes .

以16种烷烃基团键作为神经网络的输入参数，研究了44种烷烃的闪点与分子结构之间的相关性。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。