吸附
离子强度
牛血清白蛋白
朗缪尔吸附模型
白蛋白
人血清白蛋白
材料科学
离子键合
蛋白质吸附
化学工程
血清白蛋白
化学
核化学
无机化学
血液蛋白质类
色谱法
离子
物理化学
有机化学
生物化学
水溶液
工程类
作者
Diana T.Hughes Wassell,Richard L. Hall,G. Embery
出处
期刊:Biomaterials
[Elsevier]
日期:1995-01-01
卷期号:16 (9): 697-702
被引量:188
标识
DOI:10.1016/0142-9612(95)99697-k
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 AT (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 AT and K increase with decreasing pH, indicating that both electrostatic and hydration effects are important. For the ionic strength dependence, increasing NaCI concentrations result in a slight increase in AT, but K decreases. With increasing CaCI2 concentrations the AT 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.
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