膽甾 的英文怎麼說

中文拼音 [dǎnzāi]
膽甾 英文
cholest-α-ene
  • 膽 : 名詞1 [解剖學] （膽囊） gallbladder2 （膽量） courage; guts; bravery 3 （裝在器物內部 可容納水、...
  • 甾 : 名詞[化學] （有機化合物的一類） steroid
  1. Abstract : methanesulfonic acid method was used to prepare five acylated chitins. except heptanoyl chitin, four of them, i. e. acetyl chitin, propionyl chitin, butyryl chitin and hexanoyl chitin, had high degree of substitution ( from 1. 5 to 2. 0 ) and exhibited lyotropic liquid crystalline behavior and cholesteric phase. as the length of the side chain increased the critical concentration ( w / w ) somewhat increased from 0. 21 to 0. 26 because the chain rigidity dropped. the critical concentration values of all the four derivatives were much higher than that of chitin ( 0. 12 ) due to the decrease of intramolecular hydrogen bonds. the four acylated chitin can form typical banded texture after being sheared. there minimum concentrations to form banded texture of them were evidently different, varied from 0. 25 ( for acetyl chitin ) to 0. 37 ( for hexanoyl chitin ). these results further indicated that liquid crystallinity decreased while the length of flexible side substituents increased

    文摘:四種羧酰化甲殼素即乙酰化、丙酰化、丁酰化和己酰化甲殼素在二氯乙酸溶液中均呈現膽甾型溶致液晶相.臨界濃度隨側基長度增加而略有增加，衍生物的臨界濃度明顯都比原甲殼素高許多，這些規律都可以用鏈剛性的變化來解釋.四種羧酰化甲殼素在剪切時均能形成條帶織構，而且能形成條帶織構的最低濃度有明顯差別，隨側基長度增加而提高，進一步表明側基較長，液晶性減少
  2. The microscopic mechanism of cholesteric liquid crystals

    液晶膽甾相的形成機制
  3. The form of the interaction potential between molecules is assumed to be the same with which is used in the theory of cholesteric phase

    分子間相互作用勢與膽甾相微觀理論中所採用的作用勢相同。
  4. There are some disputes about the potential vx. it had not been proved by far that the form of the chiral potential vx that is generally accepted can induce the cholesteric phase

    關于v _ x的形式存在爭議，並未從理論上證明目前採用的形式一定會導致膽甾相的螺旋性結構。
  5. The microscopic mechanism of the helix structure is one of the most important questions for cholesteric phase, from the general view, which is because there are chiral potential vx

    膽甾相理論的一個核心問題是導致其螺旋性結構的微觀機制。一般認為這是由於分子之間存在手性作用勢v _ x 。
  6. In this paper, we introduce quantum theory into the liquid crystals in order to research the collective effect ( i. e. the physics effect produced by many - body effect and collective excitation ). in this way, we research the microscopic theory of nematic phase and cholesteric phase

    為了探索其集體效應（多體效應以及集體激發導致的物理效應） ，本文將量子理論引入到液晶體系，研究向列相和膽甾相的微觀理論。
  7. A super acylation catalyst, 4 - dimethylamino pyridine ( dmap ), was prepared and used to synthesize cholesteryl ester compounds. four kinds of cholesteryl ester compounds such as cholesteryl p - alkoxyl benzoate, cholesteryl dicarboxylate, cholesteryl lumequeic ester and coattail - like cholesteryl ester were synthesized by acylation method and super acylation catalyst method. chemical structures and liquid crystal behaviors of the synthesized samples have been characterized by using element analysis, ftir, dsc and polarized microscopy with a hot stage

    本文合成了高效酰化催化劑4 -二甲基氨基吡啶（ 4 - dimethylaminopyridine ， dmap ） ，採用酰氯化法和高效酰化催化劑法分別合成了對烷氧基苯甲酸膽甾醇酯、對稱脂族二羧酸膽甾醇酯、烯酸膽甾醇酯及燕尾型膽甾醇酯四類膽甾醇酯衍生物，並進行了化學結構和液晶性能的表徵。
  8. Cholesteryl carboxylic ester

    膽甾醇羧酸酯
  9. Synthesis and mesomorphism of disubstituted pyridazines containing cholesteryl

    含膽甾基的雙取代噠嗪的合成和介晶性
  10. The synthesized liquid crystal samples as a component were mixed with commercial cholesteryl liquid crystals to prepare thermochromatic liquid crystal mixture, respectively

    然後將合成的膽甾型液晶與幾種商品化的膽甾型液晶，進行混合液晶的調配與顯色示溫試驗。
  11. Among general thermochromatic liquid crystals, cholesteryl ester liquid crystals have been used in showing color and displaying temperature due to their easy obtaining, low price and reversible fresh color change

    在熱色液晶中，膽甾型液晶因原料易得，價格便宜，且顏色變化鮮艷而被廣泛使用。
  12. There are usually some disadvantages such as more toxicity and low yield in the acetylating reaction which was used to synthesize cholesteryl ester liquid crystals

    合成膽甾醇酯常用的酰氯化法存在毒性大，產率低的缺陷。
  13. The present paper covers the study on textured exchange of nematic - chocesteric liquid crystals with negative decectric anisotropy under electric field induction

    摘要對負性向列-膽甾相液晶在電場作用下的織構改變做理論分析。
  14. Like other liquid crystals ( lc ), chorlesteric phase liquid crystal ( clc ) not only owns liquidity, deformability and viscosity of liquid, but also holds the optical anisotropy of crystal

    膽甾相液晶同其他液晶態物質一樣，既有液體的流動性、形變性、粘性，又具有晶體的光學各向異性，是一種優良的非線性光學材料。
  15. At present, the planar structure of clc can be acquired by two methods. one is treating the panel of lc cell by orienting and rubbing, the other is by forming polymer net in the lc. the both method can be used at the same time

    目前，膽甾相液晶平面排態的獲得主要有兩種方法:一是通過對液晶盒的兩個基板表面進行取向摩擦;二是通過在膽甾相液晶中形成聚合物網路;當然也有二者兼用的。
  16. Then, the numerical calculation to the reflection light spectrum is deduced by utilizing berremam ’ s 4 4 matrix, which will supply theoretical gist to the following experiments. at last, the psct with better planar structure is achieved, and the psct is bistable at zero field

    本論文首先簡要介紹了膽甾相液晶自身特有的光學特性，然後利用berrenman 』 s4 4矩陣方法對膽甾相液晶的反射光譜進行了數值理論計算，從而為下一步製作psct提供了理論依據。
  17. Because of the segment of the orienting and rubbing cost high in the whole lcd production craft, omitting it can save cost of production. the method of manufacturing polymer stabilized chorlesteric texture ( psct ) with better planar structure under without orienting and rubbing is searching in this article. first, the special properties of clc are introduced

    因為摩擦取向在整個液晶生產工藝中成本很高，如果省去此環節，將會極大的節約生產成本，因此本文試圖尋找一種在省去摩擦取向環節的前提下製造具有較好平面排列態的聚合物穩定的膽甾相液晶（ psct ）的方法。
  18. Here we show that 27 - hydroxycholesterol ( 27hc ), an abundant cholesterol metabolite that is elevated with hypercholesterolemia and found in atherosclerotic lesions, is a competitive antagonist of estrogen receptor action in the vasculature

    在此我們發現27 -羥基膽甾醇（ 27hc ）是一種含量豐富的膽固醇代謝產物，它的過量引起高膽固醇血癥並存於粥樣硬化病變中，在血管中是雌激素受體競爭性拮抗劑。
  19. Phenyl group introducing to cholesteryl ester molecules can enhance the phase transition temperatures of the liquid crystals and their stability. an increase in the chain length for cholesteryl dicarboxylate samples reduced stability of liquid crystal phases. while coattail - like structures on the ester group of the molecules have an adverse effect to form cholesteryl liquid crystal phase

    化學結構對液晶性的影響表現為：分子中引入苯環剛性結構可以提高液晶的相變溫度和穩定性；脂族二羧酸膽甾醇酯中脂肪鏈的長度增加會降低液晶的穩定性；而末端含有燕尾結構則對液晶態的形成產生不利影響。
  20. The emphasis of this article is studying the influence of the polymer net in the clc to the reflected spectrum. at the same time, under the laboratory condition in possession, a design scheme of manufacturing psct with better planar structure, which needn ’ t orienting and rubbing, is found out by optimizing the craft condition like the species of polymer monomer, the concentration of monomer, the polymerization conditions ( temperature, time, uv light intensity )

    本論文的重點是研究膽甾相液晶中聚合物網路對反射譜特性的影響，在實驗室現有的條件下，通過改變聚合物單體材料、聚合物單體濃度及聚合條件（紫外光光強、光照時間、聚合溫度） ，並結合一定的理論指導和實驗現象分析，找出了一種製作具有較好平面取向的psct的設計方案。
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