ADSORPTION OF BOVINE SERUM-ALBUMIN ONTO HYDROXYAPATITE

被引:152
|
作者
WASSELL, DTH
HALL, RC
EMBERY, G
机构
[1] Department of Basic Dental Science, Cardiff Dental School, University of Wales College of Medicine, Cardiff, CF4 4XY, Heath Park
关键词
HYDROXYAPATITE; BOVINE SERUM ALBUMIN; ADSORPTION; CALCIUM; PHOSPHATE; FLUORIDE;
D O I
10.1016/0142-9612(95)99697-K
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
The adsorption of bovine serum albumin (BSA) onto hydroxyapatite (HA) has been studied as a function of protein concentration, pH and ionic strength. Isotherm data (adsorption being a reversible process) have been analysed using the Langmuir model, the adsorption parameters A(T) (maximum amount of protein adsorbed, mg m(-2)) and K (affinity constant, L g(-1)) being calculated for each solution condition (except NaF). For the pH dependence of adsorption, both A(T) and K increase with decreasing pH, indicating that both electrostatic and hydration effects are important. For the ionic strength dependence, increasing NaCl concentrations result in a slight increase in A(T), but K decreases. With increasing CaCl2 concentrations the A(T) and K values increase, the opposite being true for increasing concentrations of Na2HPO4. NaF both enhances and inhibits adsorption depending on the concentration. Possible reasons for these results are discussed.
引用
收藏
页码:697 / 702
页数:6
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