查询词典 aromatic

The result of the coupling reaction of aromatic aldehydes in Al-Na_2CO_3-MeOH and that in Al-NaOHMeOH with grinding were compared.

研究了超声波引发和研磨下Al Na2CO3MeOH体系中进行的一系列芳香醛的偶联反应，比较了研磨作用下Al Na2CO3MeOH和Al NaOH MeOH这2种体系中进行的一系列芳香醛偶联反应的结果

The reactions of aromatic aldehydes with 〓also were studied and a similar mechanism as that of for-maldehyde was found.

第四部分研究了取代苯甲醛与〓在酸催化下的反应动力学，确证了与甲醛反应相似的机理。

In the first part of this thesis, Stress relaxation method set up in the software of DMA was used to perform the aromatic and aliphalic (D2192-BAPP) PI film stretching process. To study the optical anisotropies property to the light leakage from the crossed polarizers, we put the stretched samples into one set of crossed polarizers and as expected, the stretched PI films could reduce the light leakage at view angle of ±45 deg, and exhibited a visually observed compensating property of an A-plate. No color shift wasobserved, and the birefringence was very uniform. These results prove a uniform birefringence can be obtained by a stretched process for PI films.

首先，我们以动态机械分析仪的应力缓和模式对芳香族FDA-BAPP PI及脂肪族D2192-BAPP PI薄膜进行拉伸实验，并将拉伸后的PI薄膜置於一组相互交差的偏光片中观察其光学异向性，发现拉伸后的PI薄膜试片可以降低在±45o视角的漏光的效果，展现出如同A-Plate的光学补偿特性，所显现的光学补偿效果相当的均匀而且没有色偏的情形发生，证实以拉伸方法可以造成PI薄膜很均匀的双折射效应。

The results show that the aromatic structures of vacuum residue fraction s with different polarity and aromaticity can be distinguished by their synchronous flourescence spectra.

减压渣油组分的同步荧光光谱能够较好地反映出各极性和芳香度不同的组分的芳香环系大小。

Partition coefficients of neutral aromatic solutes in LEKC between 288~323 K were measured. A series of thermodynamic parameters were obtained by third-order polynomial fitting Van't Hoff plots. The thermodynamic partitioning behavior of those solutes was investigated. The results showed that the partition coefficient became greater with the increment of temperature and the number of CH2 functional groups on benzenering.

在288~323K范围内测定了中性芳香族溶质在脂质体电动色谱中的分配系数，通过三项式拟合Van't Hoff图获得了一系列的热力学参数，研究了溶质在脂质体电动色谱中的热力学分配行为。

Complex notes of cedar, clove and charcuterie abound, creating an impressive aromatic Shiraz offering.

此外，雪松与丁香的复杂气味更增添了穗乐仙葡萄给人深刻印象的芬芳。

In chemical terms, humic substances are condensations of aromatic compounds combined with the decomposition products of proteins and polysaccharides.

在化学条款中，腐殖质的物质是把芳香的化合物与蛋白质和多糖的分解产品结合起来的凝聚。

Chapter 3: The microscopic and macroscopic NLO properties of these condensations of aromatic amine with benzaldehyde derivatives were studied.

第三章：从微观和宏观两个方面研究了四类苯甲醛缩芳胺希夫碱衍生物系列二阶非线性光学材料的性质。

Knoevenagel condensations of aromatic aldehydes with active methylene compounds were performed in the presence of room temperature ionic liquid without any additional volatile organic solvents.

6利用室温离子液体作催化剂，在无另加有机溶剂的条件下，考察了芳香醛和活泼亚甲基化合物的Knoevenagel缩合反应。

Chapter 2: Four kinds of condensations of aromatic amine with benzaldehyde derivatives were obtained by solid phase synthesis. Their structures were identified by element analysis and 1H NMR spectroscopy. Their SHG properties, fluorescent and thermochromic properties were also tested.

第二章：通过室温固相反应合成了四类苯甲醛缩芳胺希夫碱衍生物，用元素分析和核磁共振对其结构进行了确定，并测试了它们的非线性性质、荧光性质以及热致变色性质。

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。