教師資料查詢 | 類別: 期刊論文 | 教師: 曾琇瑱 Tseng Shio-jenn (瀏覽個人網頁)

標題:Effect of PH on the electrophoretic mobility of a particle with a charge-regulated membrane in a general electrolyte solution
學年87
學期2
出版(發表)日期1999/07/01
作品名稱Effect of PH on the electrophoretic mobility of a particle with a charge-regulated membrane in a general electrolyte solution
作品名稱(其他語言)
著者曾琇瑱; Tseng, Shio-jenn; Lin, Sung-hwa; Hsu, Jyh-ping
單位淡江大學數學學系
出版者Elsevier
著錄名稱、卷期、頁數Colloids and Surfaces B: Biointerfaces 13(6), pp.277-286
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.
關鍵字Electrophoretic mobility;Charge-regulated membrane;Dissociable acidic function groups;General electrolyte;Donnan potential
語言英文
ISSN0927-7765
期刊性質國外
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國別荷蘭
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