芳香

Results The rectangular stemwith longitudinal groove,surface of leaf with fovea,odor acroma were the key identical characters of Ocimum basilicum L.

结果 九层塔的茎近方形，有纵沟纹、叶片表面有凹点，气味芳香。

By use of titration analysis, the thesis investigated various factors such as isocyanate, PE molecular weight, reacting substance molecular ratio, reacting temperature and time etc. influencing upon prepolymerization step. It was found that 2, 4-tolulene diisocyanate and 4, 4'diphenylmethane diisocyanate is more rapidly reacted with PE600 than HDI. With PE molecular weight increasing, the reacting temperature or time should be raised or extended relevantly. Thus PE2000+2HDI pre-polymerization should be better carried out under some catalyst, for example, Triethylene diamine , Dibutyltin dilaurate and Tin octoate were used.

首先采用滴定分析方法对WRPU预聚反应的影响因素进行了研究：芳香族二异氰酸酯TDI、MDI比脂肪族二异氰酸酯HDI反应活性高，其中TDI在反应初始阶段的反应速率比MDI快，不过随着反应的进行，MDI比TDI反应速率加快，这主要是因为TDI分子中的两个-NCO反应活性差异大所致；二元醇分子量越大，反应速度越慢；聚醚二元醇比聚酯二元醇的反应速度快；当分子量超过2000的二元醇与HDI进行预聚反应时，需借助适当的催化剂来加快反应速度，从而使预聚反应能够顺利进行，分别选择DABCO、TOA和DBDTL三种催化剂进行催化反应，发现不同的催化剂，其催化效果相差较大。

A Mediterranean evergreen tree Olea europaea having fragrant white flowers , usually lance shaped leathery leaves , and edible drupes .

树一种地中海地区的常青树有白色芳香花朵，矛状坚韧的叶和可食的核果

Any of various mostly Australian attractively shaped shrubs of the genus Olearia grown for their handsome and sometimes fragrant evergreen foliage and profusion of daisy flowers with white or purple or blue rays.

任何一种属于树紫菀属的大多在澳大利亚的有着迷人形状的灌木丛，由于其美丽的有时是芳香的常青树叶而载植，还有浮现着白色、紫色或兰色的雏菊花。

Olefine, electrophilic or nucleophilic substitution of arenes, nucleophilic addition of carbonyl compounds stereochemistry in elimination reaction of double bond forming and the choosing of oxidants and reducing agents in redox system.

在化学反应方面重点是烯烃的亲电加成，芳香烃的亲电，亲核取代，羰基化合物的亲核加成，消除反应的双键定位和立体化学，氧化，还原反应中氧化还原剂的选择。

They are sometimes difficult to differentiate from aromatic or olefinic absorptions.

有时它们就难于和芳香族或烯烃的吸收峰相互区别。

Recent developments of clean oxidation systems catalyzed by polyoxometalates are summarized in detail. The emphasis is on the epoxidation reaction of olefinic compounds, oxidation of alkanes and aromatic compounds with the comparatively ideal oxidants, hydrogen peroxide and molecular oxygen respectively.

文本总结了多金属氧酸盐在液相清洁催化氧化方面的进展，主要针对以过氧化氢和分子氧为氧化剂的烯烃类化合物的环氧化反应、烷烃和芳香族化合物的氧化反应，并详细探讨了此类氧化反应的反应机理。

Recent developments of clean oxidation systems catalyzed by polyoxometalates are summarized in detail. The emphasis is on the epoxidation reaction of olefinic compounds, oxidation of alkanes and aromatic compounds with the comparatively ideal oxidants, hydrogen peroxide and molecular oxygen respectively. The oxidation mechanisms are elucidated in detail.

文本总结了多金属氧酸盐在液相清洁催化氧化方面的进展，主要针对以过氧化氢和分子氧为氧化剂的烯烃类化合物的环氧化反应、烷烃和芳香族化合物的氧化反应，并详细探讨了此类氧化反应的反应机理。

The olfactometric analysis revealed that 15 aroma compounds showed a similar AEDA value in both wines even if, in some cases, they had different concentrations in the two Fiano wines.

嗅觉测量分析法显示，两类酒中15种芳香复合物具相同的AEDA值，即便是有时浓度不同——这可能是受嗅觉测量法技术的限制。

We discuss the mechanism of trimerization of nitriles catalyzed by organolithium compounds and study the catalystic characteristics. Using this new method, the yield of triazines is greatly improved.

另外，实验探讨了有机锂化物对芳香腈三聚反应的催化作用，得到了较高的产率，同时，研究了它的作用机理和催化性能。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。