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The UV and IR spectroscopic studies of the monomer films showed that the photoreaction ratio of monomer (about 50%) was higher than the corresponding photosensitive polymer (about 10%, PVCi). The polarized IR spectra proved that obvious anisotropic absorption was displayed in the irradiated photosensitive film. With polarizing microscopy method, we found that these kinds of photoalignment films exhibited good alignment ability, and the stability of the photoalignment film could reach about 100℃. 2 A photosensitive self-assembled monolayer was fabricated that contained photo-cycloadditable groups, such as, coumarin and cinnamate. The reaction process were detected by contact angle method because the IR absorption of monolayer was very weak. The photosensitive self-assembled monolayer promote uniform alignment of nematic liquid crystals by LPUV, and it thermal stability could reach about 130℃. 3 A cationic bolaform amphiphiles was synthesized that had two photosensitive double bonds, and can be polymerized by ultraviolet. A layer-by-layer self-assembled deposition film was prepared in aqueous solution by using this material and poly (sodium 4-styrenesulfonate). The UV-Vis. spectra proved that the multilayers film was uniform and layer-by-layer. When LPUV irradiated the film, the photopolymerizable double bond underwent [2+2] cycloaddition, and the production of the reaction distributed along the polarized direction of incident LPUV. Polarized UV-Vis. spectra indicated that the irradiated self-assembled multiplayer film was anisotropic, and the dichromic ration is about 0.09, it is higher than the spin-coating method of photosensitive polymer or monomer. We used this anisotropic film as alignment layer of nematic liquid crystals, and obtained a uniform and stability alignment result, the static contrast ratio is about 100, which is very close to application of liquid crystal device. This thesis is an instance that the photochemical material was used in the physics region of liquid crystals, the route that was from photosensitive monomer, self-assembled monolayer film to self-assembled multiplayer film was undergone, by this logical research method photoailgnment of liquid crystal was extended and consummated.

围绕上述思路开展了如下工作:1合成了三种可进行光二聚反应的光敏小分子单体,LPUV 辐照制作了光控取向膜;用紫外-可见光谱法和红外光谱法分析了薄膜中的光化学反应,发现小分子的光反应程度可达到50%以上,至少比光敏高分子高出5倍;薄膜的偏振红外光谱证实,经过LPUV 辐照后薄膜出现了明显的各向异性;将小分子光控取向膜制成液晶器件,在偏光显微镜下观察看到均匀一致的液晶取向;并且热稳定性达到100℃左右,接近实用化要求。2制备了含肉桂酸、香豆素基团的自组装单层膜;采用接触角的方法监测自组装反应的动力学过程;紫外-可见光谱证实了自组装单层膜在石英基板表面形成;自组装单层膜经LPUV 辐照后能诱导液晶均匀取向,而且热稳定性可达130℃,热稳定性进一步提高。3合成了含有光敏双键的双季铵盐,在水溶液状态下将它和聚乙烯基苯磺酸钠沉积生成layer-by-layer 自组装多层膜,紫外-可见光谱证实这是一个逐层均匀的沉积;在LPUV 照射下,自组装膜中的光敏双键按照偏振方向发生[2+2]环加成反应,形成取向膜,用二向色性值评价的分子取向度高于高分子及小分子光控取向膜的水平;实验证明用自组装多层膜制成的液晶器件亮暗态均匀,静态对比度约为100,达到实用化器件的水平。

Activities of phenylalanine ammonia - lyase, cinnamic acid 4 - hydroxylase and diterpene cyclase in rice plants are induced when their leaves are irradiated with UV light for 12 hours and 24 hours.

紫外光处理水稻化感材料后12 h和24 h,被诱导的苯丙氨酸氨基裂合酶、肉桂酸-4-羟化酶(CA4H)和二萜环化酶的酶活力比紫外光处理的无化感作用水稻中的要高2-4倍。

The electroreduction of cinnamonitrile in MeCN solution was studied using cyclic voltammetry, with two reduction peaks at -1.46 and -2.0 V.

采用循环伏安法研究了肉桂腈在乙腈溶液中的电还原行为,其在-1.46和-2.0V处各存在一个还原峰。

Other compounds: such as Vanillin, Phenyl Acrylic acid and Geranyl Formate.

其它化合物:如香草醛、肉桂酸和甲酸香叶酯等。

In a small bowl, stir together the granulated sugar and cinnamon; sprinkle over dough.

在一个小碗里,将砂糖和肉桂搅拌在一起,洒在面团上。

The performance of this catalyst for the cross-coupling reaction of iodobenzene with acrylic acid was studied.

研究了该催化剂对碘代苯与丙烯酸交叉偶联生成反式-肉桂酸的催化性能。

The Effect of different reaction conditions (solvent, reaction temperature, molar ratio of iodobenzene and acrylic acid, kind and amount of base, amount of catalyst, reaction time) on the yield was investigated. The suitable condition of the reaction was obtained.

考察了不同反应因素(溶剂、温度、原料比、缚酸剂及其用量、催化剂用量、反应时间)对反应的影响,确定了该催化剂对碘代苯与丙烯酸交叉偶联生成反式-肉桂酸的适宜反应条件。

The developed catalysts demonstrated good activities towards the Heck reaction of iodobenzene and methyl acrylate with about 90% yield, easy separation after reaction and reusability. The metal leaching was not apparent after four runs.

以碘代苯与丙烯酸甲酯的Heck反应为例,考察双腈基固载Pd的催化性能,肉桂酸甲酯的收率近90%,四次循环使用后催化活性没有明显的降低,Pd的析出并不严重,该催化剂易回收使用。

ResultsThe optimum synthetic conditions were 2 g cinnamic acid,microwave power was 600 W,reaction temperature was 115℃,reaction time was 14 min,mass percent of macroporous resin was 30%,the molar ratio of cinnamic acid to isobutyl alcohol was 1:7, and the yield of the new process was 89.3%.

结果肉桂酸2 g,酸醇摩尔比1∶7,催化剂用量30%,微波功率600 W,微波温度115℃,微波时间14 min,转化率达89.3%。

Osmophloeum Kaneh. Are endemic species of the Lauraceae in Taiwan. Taxonomy of these closely related species remains unclear. In this study, ISSR fingerprinting using 12 microsatellite primers was employed to investigate the taxonomic status of the tree species and intraspecific diversity and differentiation.

osmophloeum Kanehira等为台湾樟科特有种植物,此三种肉桂类植物在植物分类上一直存有爭议及困难,本研究应用简单序列重复(Inter-Simple Sequence Repeat,简称ISSR)分子指纹技术探討其遗传变异与分类地位关係。

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The objective is to subjugate and discourage the people, because that allows the elite to continue to rule unopposed.

其目的是压制和打击人民的积极性,因为这可以让实权派继续统治不会沦为反对派。

GOD,this is the second time you vanquished me!

天啊,这是第二次你打败了我!

So a kind of strong antagonism permeated in the relations of two countries.

所以两国这一时期的政治关系始终弥漫着一种强烈的对抗情绪。