cholesteric 中文意思是什麼

cholesteric 解釋
膽甾醇類的
  1. Main ingredient : bio - gold, sodium dna, extracts of ginseng, with hazel, tea and horsetail, cholesteric esters

    主要成分:活性金植物dha人參金縷梅茶馬尾草提取物。
  2. 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
  3. The microscopic mechanism of cholesteric liquid crystals

    液晶膽甾相的形成機制
  4. 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。
  5. 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。
  6. 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 。
  7. 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。
  8. The chiral compounds synthesized in the project have an unsaturated double bond, which can be mixed with polymerizable nematic liquid crystal compounds, and the resulting mixture can be polymerized to form an optical film having cholesteric liquid crystal texture

    具有可聚合基之旋光性化合物可添加於可聚合型向列型液晶單體中，聚合成具有膽固醇相、反射特定波長之光學薄膜，且較少用量之高螺旋扭轉力性質之旋光性化合物即可配出特定螺距之膽固醇液晶紋理。
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