查询词典 aromatic

Ethylene unit ; 9 carbon ; aromatic hydrocarbon ; solvent naphtha ; petroleum resin

乙烯装置； 9碳；芳烃；溶剂油；石油树脂

The adsorption and desorption behaviour of polycyclic aromatic hydrocarbons on different fractions was investigated using phenanthrene as model substrate.

研究了多环芳烃菲在不同粒级有机-矿质复合体上的吸附和解吸行为。

The internal and external development of p -aromatic polyamide fiber , particularly poly ( p -phenylene tereph-thalamide) fiber, was introduced from the aspects of fiber varieties, output, properties and advanced composite materials reinforced with this fiber.

介绍了对位芳香族聚酰胺纤维特别是聚对苯二甲酰对苯二胺纤维的国内外发展情况，包括纤维品种、产量、性能和该类纤维作为先进复合材料骨架的发展情况。

Therelationship of the amount of catalyst and the ee% of product was seen to be negative nonlin-ear. Catalyst 3 was used in the enantioselective addition of diethylzinc to aromatic aldehydesand gave good results. The configuration of products was determined by the configuration ofthe catalysts' chiral carbon linked with hydroxy group. Using β- amino alcohols bearing only one chiral center as catalysts for the enantiose-lective addition were studied. D-N, N-dialkyl-2-amino butanol gave poor catalytic effect be-cause of their structure. The configuration of the product is the same as the catalyst. Anotherkind of β- amino alcohols - phenylglycine derivatives and valine derivatives have chiralcenter on the carbon linked with amino group. Catalyzed by-phenylglycine derivatives 6,7, 9, 10, the reactions gave satisfied results. The optical yields exceeded 80%.

在探讨了含有两个手性中心的β-氨基醇之后，选择了只有一个手性中心的β-氨基醇，一是手性中心为连羟基的手性碳原子：D-N，N-二烷基-2-氨基丁醇；二是手性中心为连氨基的手性碳原子：D-苯基甘氨酸衍生物和L-缬氨酸衍生物。D-2-氨基丁醇的催化效果不太好，这与其结构的空间位阻较小有关系，反应产物与连羟基手性碳构型一致；由苯基甘氨酸和缬氨酸出发合成五种β-氨基醇6-10，研究了不同ee％的-6作用下的二乙基锌-苯甲醛加成反应，发现该催化剂具有不对称放大效应；-7，9，lO的催化效果也比较令人满意，光学产率80％以上，所得产物构型与催化剂构型一致。

Fluorescence-quenching experiments of HSA at 330 nm during a 40-min irradiation show aromatic amino acids such as tryptophan were destroyed along with the decrease of CL intensity during the course of photosensitization of HP.

辐照混合液40分钟过程中，HAS在330nm处的发光淬火实验表明HP的光敏化反应过程中色氨酸等芳香族氨基酸随著化学发光强度的降低被破坏。

A method for the determination of polycyclic aromatic hydrocarbons and phthalate esters in soil samples by gas chromatography-mass spectrometry was developed.

建立了气相色谱-质谱测定土壤中多环芳烃和酞酸酯类有机污染物的方法。

C〓 alkylthiophene from aromatic fraction of pyrolysates at 200℃ probably originated from the combination of phytol group of chlorophyll and organic surphur of algal cells.

盘星藻200℃热解产物芳烃组分中的C〓烷基噻吩可能是来源于叶绿素类的植醇基与来源于藻类体内的有机硫结合而形成。

It is light,fruity,aromatic and a perfect choice for ending a meal.Grape Zone Origin: Piedmont .

它是口感轻淡，圆润，芳香的，用于结束一顿饭完美的选择。

Some new α,β-unsaturated sulfones were prepared by condensation of 4-nitrophenylsulfonylacetates with aromatic aldehydes in cyclohexane/CH_3CH_2OH in the presence of catalytic amounts of piperidine.

不饱和砜是以对硝基苯磺酰基乙酸酯为原料与芳香醛在六氢吡啶醋酸盐催化下发生缩合反应制得的。

Planking is a traditional Northwest-style of cooking using aromatic pieces of wood.

用一块略带芳香的木板做平板烧是典型的西北风格的烹饪。

The system can be widely used in belt weighing and batching process control,etc.

介绍了基于智能模糊控制的嵌入式配料系统的设计方法，对模糊PID控制过程和系统调零作了重点的讨论，同时给出了PID控制的程序流程图和系统定长调零子程序。

"I dunno," she answered,"but if you show me aroun', I'll recognize it from the lighthouse just outside the porthole."

"我不知道，"她回答说，"如果你能带我转转，我能认出来的，因为灯塔就在舷窗外。"