高等学校化学学报

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298.15 K下氨基酸在D-木糖水溶液中的体积性质

许莉1, 王旭1, 马林2, 林瑞森1   

    1. 浙江大学化学系, 杭州 310027;
    2. 广西大学化学化工学院, 南宁 530004
  • 收稿日期:2006-01-18 修回日期:1900-01-01 出版日期:2006-08-10 发布日期:2006-08-10
  • 通讯作者: 林瑞森

Volumetric Properties of Amino Acids in Aqueous D-Xylose Solutions at 298.15 K

XU Li1, WANG Xu1, MA Lin2, LIN Rui-Sen1   

    1. Department of Chemistry, Zhejiang University, Hangzhou 310027, China;
    2. College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China
  • Received:2006-01-18 Revised:1900-01-01 Online:2006-08-10 Published:2006-08-10
  • Contact: LIN Rui-Sen

摘要: 报道了甘氨酸、L-丙氨酸和L-丝氨酸3种典型氨基酸在D-木糖水溶液中的体积性质.

关键词: 氨基酸, D-木糖水溶液, 偏摩尔体积

Abstract: Densities of glycine, L-alanine and L-serine in various aqueous D-xylose solutions were measured at 298.15 K by an Anton Paar Model 55 densimeter. Apparent molar volumes, limiting partial molar volumes and hydration numbers for these amino acids were calculated. The transfer volumes from water to aqueous D-xylose solutions were obtained and discussed in terms of the structural hydration interaction model. The results show that all of the transfer volumes are positive, and increase with increasing xylose concentration; the side-chain contributions to the transfer volumes are highly related to the nature of side-chain groups; the hydration numbers for the three amino acids in solutions decrease with increasing xylose concentration.

Key words: Amino acid, Aqueous D-xylose solution, Partial molar volume

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