The influences of BY binder on molding sand properties was analysed sysemically and the best proportion BY of bentonite,BY binder,moisture content and coal dust is found by integrative element experiments and singleelement experiments.

分析了BY粘結(jié)劑對型砂性能的影響澳门一级A片免费播放，并通過正交試驗和單因素試驗影音先锋在线资源免费，找出了膨潤土、BY粘結(jié)劑亚洲特a级黄片、水分和煤粉四種原材料在型砂中的最佳配比禁止18随进入的网站；探討了BY粘結(jié)劑的經(jīng)濟(jì)效益。

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.

圍繞上述思路開展了如下工作：1合成了三種可進(jìn)行光二聚反應(yīng)的光敏小分子單體黄色av免费在线播放，LPUV 輻照制作了光控取向膜亚洲精品自拍AV在线日韩；用紫外-可見光譜法和紅外光譜法分析了薄膜中的光化學(xué)反應(yīng)，發(fā)現(xiàn)小分子的光反應(yīng)程度可達(dá)到50%以上影音先锋高清无码，至少比光敏高分子高出5倍国产黄色视频流畅在线免费；薄膜的偏振紅外光譜證實，經(jīng)過LPUV 輻照后薄膜出現(xiàn)了明顯的各向異性色色视频资源网站；將小分子光控取向膜制成液晶器件古装一级婬片A片AAA毛片，在偏光顯微鏡下觀察看到均勻一致的液晶取向；并且熱穩(wěn)定性達(dá)到100℃左右欧美顶级黄片片一区二区，接近實用化要求美女网站在线免费视频色。。2制備了含肉桂酸、香豆素基團(tuán)的自組裝單層膜2019A级毛片；采用接觸角的方法監(jiān)測自組裝反應(yīng)的動力學(xué)過程黄片ID久久；紫外-可見光譜證實了自組裝單層膜在石英基板表面形成；自組裝單層膜經(jīng)LPUV 輻照后能誘導(dǎo)液晶均勻取向一道本a级片，而且熱穩(wěn)定性可達(dá)130℃人人摸天天射，熱穩(wěn)定性進(jìn)一步提高。3合成了含有光敏雙鍵的雙季銨鹽亚洲黑人欧美在线黄片，在水溶液狀態(tài)下將它和聚乙烯基苯磺酸鈉沉積生成layer-by-layer 自組裝多層膜高清无码不卡在线观看，紫外-可見光譜證實這是一個逐層均勻的沉積；在LPUV 照射下XXXX黑人性ⅩXXXX，自組裝膜中的光敏雙鍵按照偏振方向發(fā)生[2+2]環(huán)加成反應(yīng)国产一级A片无码免费欧，形成取向膜，用二向色性值評價的分子取向度高于高分子及小分子光控取向膜的水平精品国产群3p在线交换；實驗證明用自組裝多層膜制成的液晶器件亮暗態(tài)均勻小草在线一区二区欧美，靜態(tài)對比度約為100，達(dá)到實用化器件的水平亚洲黄色a片。

The main results were as follows: 1 The 6, 7, and 8oP worts were fermented by...

主要研究結(jié)果如下： 1 將4株啤酒酵母BY-1男女肏穴网，BY-2，BY-3和BY-4分別接種入6oP91精品国产自产在线观看高清，7oP欧美综合自拍亚洲综合图片区，8oP定型麥汁中，10oC發(fā)酵91另类在线视频。

by reason of：由于 by the way 順便說說

by no means 決不,并沒有 by oneself 單獨(dú)地,獨(dú)自地 | by reason of 由于 by the way 順便說說 | by virtue of 借助,由于 by way of 經(jīng)由,通過......方法

并肩 by then 到那時：side by side

little by little 逐漸地 step by step 逐步地 | side by side 并肩 by then 到那時 | ruin v. 毀壞,破壞 n. 毀滅

借助,由于 by way of 經(jīng)由,通過......方法：by virtue of

by reason of 由于 by the way 順便說說 | by virtue of 借助,由于 by way of 經(jīng)由,通過......方法 | little by little 逐漸地 step by step 逐步地