淡江大學機構典藏:Item 987654321/41685
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    题名: Effect of PH on the electrophoretic mobility of a particle with a charge-regulated membrane in a general electrolyte solution
    作者: 曾琇瑱;Tseng, Shio-jenn;Lin, Sung-hwa;Hsu, Jyh-ping
    贡献者: 淡江大學數學學系
    关键词: Electrophoretic mobility;Charge-regulated membrane;Dissociable acidic function groups;General electrolyte;Donnan potential
    日期: 1999-07
    上传时间: 2010-01-28
    出版者: Elsevier
    摘要: The electrophoretic motion of an entity comprised of a rigid, uncharged core covered by a charge-regulated membrane which simulates a biological cell, in a general a:b electrolyte solution is analyzed. The membrane carries a fixed charge which arises from the dissociation of the acidic functional group HA. We show that the higher the concentration of cations in the bulk liquid phase, the lower the absolute Donnan potential, ∣ϕD∣, and the lower the concentration of functional group, N0, the lower the ∣ϕD∣. Also, the higher the pH, the higher the absolute electrical potential, and the greater the N0, the lower the pH. The absolute mobility of a cell, ∣μ∣, increases with pH, but decreases with the increase in the friction coefficient of the membrane phase, γ. For a fixed total number of HA, if γ is large, μ/μs is less than unity, μs being the mobility of the corresponding rigid particle, and it decreases with the thickness of membrane d, and the inverse is true if γ is small. For a medium γ, the variation of μ/μs as a function of d has a local maximum, and depending upon d, it can be either greater or less than unity.
    關聯: Colloids and Surfaces B: Biointerfaces 13(6), pp.277-286
    DOI: 10.1016/S0927-7765(99)00040-5
    显示于类别:[數學學系暨研究所] 期刊論文

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