Tsortos A, Nancollas GH
Department of Chemistry, State University of New York at Buffalo, Buffalo, New York, 14260
J Colloid Interface Sci. 1999 Jan 1;209(1):109-115. doi: 10.1006/jcis.1998.5881.
The adsorption of two polyelectrolytes, poly-L-Glutamate and poly-L-Aspartate, on hydroxyapatite (HAP) crystals was studied both experimentally and theoretically. Langmuir adsorption isotherms were obtained for both these molecules, with binding constants K = 6 x 10(6) and 3 x 10(6) M-1, respectively, at 37.0 degreesC, pH 7.4, and 0.15 M ionic strength. A theoretical analysis of the data, based on a model proposed by Hesselink, suggested a "train-loop" type of adsorption with non-electrostatic energy terms 3.51 and 4.76 (kT) for poly-L-Glu and poly-L-Asp, respectively. Copyright 1999 Academic Press.
通过实验和理论研究了两种聚电解质——聚-L-谷氨酸和聚-L-天冬氨酸在羟基磷灰石（HAP）晶体上的吸附作用。在37.0℃、pH 7.4和0.15 M离子强度条件下，获得了这两种分子的朗缪尔吸附等温线，其结合常数K分别为6×10⁶和3×10⁶ M⁻¹。基于赫塞林克提出的模型对数据进行的理论分析表明，聚-L-谷氨酸和聚-L-天冬氨酸的吸附为“尾-环”型，非静电能量项分别为3.51和4.76（kT）。版权所有1999年学术出版社。
