查询词典 customs bond
- 与 customs bond 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Furthermore, the paper has found the relation between depth of diagenetic stages and depth of boundaries of strata, and established prognostic model for diagenetic stages, which provides basis for prediction of secondary porosity bond.
在此基础上,找到了成岩阶段的界线深度与地层界线深度之间的关系,建立了成岩阶段界线深度定量预测模型,为次生孔隙发育带的预测提供了依据。
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According to the intrinsic viscosity in dichloroacetic acid at 25℃, the molecular weight of polymers were estimated to be 20, 000~50, 000.Because of the thermal instability of the urea bond in molecular chain, all synthetic polymers began to degrade around 220℃, and had no melting point.
由于模拟聚合物中所含的脲键存在着热不稳定性,所有聚合物的热分解温度都在220℃附近(低于天然动物丝蛋白分解温度),并且所有聚合物样品在熔融之前已开始分解;另外只有分子量比较大的模拟聚合物P4有明显的玻璃化转变(T〓=107℃)。
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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。
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Theoretical studies on the halogen-bond in complexes of furan and dihalogen molecules have been carried out at the level of DFT and MP2.
用DFT和MP2方法研究了呋喃-XY (XY=ClF, BrF, BrCl)体系分子间的相互作用,讨论了两种卤键类型 Y—X…O和Y—X…π的作用。
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In accompanying with the - dihydrogen bond, two secondary interactions are exposed.
证明了键函数在此类体系的计算中是可行的。
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At the same time,dihydrogen bond in 2,7'-Ethq2 and M(2,7'-Ethq2)2 have been studied using NBO analysis.
同时,利用自然键轨道理论对分子内氢键进行了分析。
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A new organic compound, trans-2--5-dimesitylborylthiophene (abbreviated as DMASBT, 5) with dimesitylboryl, dimethylamino and styryl-thiophene as electron acceptor, electron donor and conjugate bridge respectively, was synthesized. Its crystal structure determined by X-ray diffraction method indicates that the B-C bond between B atom and it bridge is obviously shorter than those of between B atom and mesityl groups. This remarkably strengthened B-C bonding can be regarded as an evidence of additional p-7t conjugation between the B atom and n bridge.
合成了以含硼基团为电子受体,以二甲胺基为电子给体,以苯乙烯基噻吩为共轭桥的新化合物2-[(4'-N,N-二甲胺基)苯乙烯基]-5-二米基硼-噻吩 trans-2-[(4'-N, N-dimethylamino) styryl]-5-dimesitylboryl-thiophene(简写为DMASBT,5)。X射线衍射方法测定其单晶结构表明,硼原子与π共轭桥之间的硼碳键相对于其它的硼碳键明显缩短,硼与π共轭桥之间存在除了σ键之外的p-π共轭作用。
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The results showed that new type structure of organic phase containing inorganic phase between polyimide and titania particle by bond conjunct was formed.The discomposing temperature was decreased with the increasing of TiO2 contents,and the thermal stability was better than polyimide materials under the temperature of 450℃.The pore size increased with the increasing of TiO2 contents,and pore size distribution tended to disperse.The permeability of N2,H2 and CO2 across the membrane were controlled by Knudsen diffusion,and the memebrane exhibited outstanding hydrophilicity since their permeation coefficients of H2O/N,are higher than the Knudsen diffusion values.
结果表明,杂化膜材料形成了有机相包裹无机相的交联结构;聚酰亚胺与二氧化钛粒子形成了新型键联结构;其热分解温度随二氧化钛含量的增加而降低,在 450℃以下热稳定性优于聚酰亚胺膜材料;平均孔径随二氧化钛含量增大而增大,孔径分布趋于弥散;N2、H2和CO2在膜内渗透由Knudsen扩散控制,H2ON2分离因子均大于Knudsen扩散值,表现出良好的亲水性。
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He has dissoluble bond with literature in his early year.
他早年就和文学结下了不解之缘。
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Ild type azurin is immobilized using a disulphide bridge to form a covalent bond with gold surfaces.
T和K27C两种铜蓝蛋白在表面分布和分子高度上都存在差异。
- 相关中文对照歌词
- Rockafella
- My Word Is Bond
- James Bond
- Word Iz Bond
- What U Lookin' 4
- We'll Be The Same
- Bond
- J.B.G.
- Who Is A Thug
- Maid Of Bond Street
- 推荐网络例句
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However it can often be frust ating for a child when people are unable to pronounce their name.
但它往往可以令人沮丧的一个孩子当人们无法断言他们的名字。
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All these compounds were obtained from this genus for the first time. Compound, 4-cumylphenol, was a new nature product.
所有化合物均为首次从本属海藻中分离得到,其中4cumylphenol为新天然产物。
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But this is unbelievable .too much.
但是这太令人难以置信。