decrease of acid-concentration 中文意思是什麼
decrease of acid-concentration
解釋
酸濃度的減少- decrease : n 1 減少，減小，減退。2 減少額，減小量。vt vi 減，減少，減退；（溫度表等）下降。 decrease the num...
- of : OF ＝Old French 古法語。
- acid : adj. 1. 酸味的。2. 【化學】酸的，酸性的。3. 〈比喻〉尖酸刻薄的，易怒的。n. 1. 酸味物。2. 【化學】酸。adv. -ly ,-ness n.
- concentration : n. 1. 集中。2. 【化學】提濃，蒸濃，濃縮；濃度；稠密度；【礦物】汰選，選礦，富化。3. 集中注意，專心。
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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 -
The decomposition rate of acetic acid increases, up to 99 %, with the increase of temperature, concentration of acetate acid or oxygen excessive rate and with the decrease of mass - flow
在實驗的條件范圍，氧氣過量倍數和溫度越高，乙酸水溶液質量流量越小，乙酸的降解率也越高。
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