lyotropic 中文意思是什麼

lyotropic 解釋
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  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. Rheological properties of lyotropic liquid crystal

    表面活性劑溶致液晶的流變學性質
  3. For chitosan, when the concentration of chitosan is under 0. 1mg / ml, the structure of molecular chain can be observed by afm. at the same time, the refined structure of lyotropic liquid crystal of chitosan and the changes of structure were studied. films with liquid crystalline texture can be prepared from diluted solutions which concentration is lower than critical concentration of liquid crystal

    對于殼聚糖（ chitosan ） ，通過afm直接對殼聚糖進行分子結構水平的觀察研究，發現在濃度低於0 . 1mg ml的稀溶液中用afm可以清楚觀察到糖鏈間形成的環狀或螺旋結構，以及鏈內側枝繞合排列的樹枝狀結構，這種現象是由於糖鏈間和糖鏈內的氫鍵締合所致。
  4. Research advancement of structures and application of lyotropic liquid crystals

    溶致液晶的結構及應用研究進展
  5. A typical lyotropic liquid crystal can be prepared by mixing water and one or more amphiphilic compounds

    典型的溶致液晶是由水和一個或多個雙親化合物形成的。
  6. Lyotropic iquid crystals are responsive to concentration changes and to changes in temperature. phase changes can come about by change in either concentration or temperature, or by a change of both simultaneously

    溶致液晶對溫度的改變和濃度的改變都敏感，改變濃度或溫度、或同時改變濃度和溫度都會引起相的變化。
  7. We have synthesized two novel crown ether compounds which possess the properties of lyotropic liquid crystals. the one is n - octoxymethyl - 15 - crown - 5, the other is ( 15 - crown - 5 ) methyl stearate. the hydrolysis of pnpp ( p - nitrophenyl pipolinate ) catalysis by n - octoxymethyl - 15 - crown - 5 micellar solution has been studied spectrephoto - meterically

    我們合成了兩種具有溶致液晶性質的冠醚化合物，正辛氧基甲基- 1 ， 4 ， 7 ， 10 ， 13 -五氧雜環十五烷和硬脂酸（ 15 -冠- 5 ）甲酯和3 -正辛氧基- 1 ， 2丙二醇。
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