アルカリ洗浄におけるオゾン改質アルミナ表面からの牛血清アルブミンの脱着速度論  [in Japanese] Kinetics of Desorption of Bovine Serum Albumin from Ozone-Modified Alumina Surfaces during Caustic Alkali Cleaning  [in Japanese]

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Author(s)

Abstract

The kinetics of desorption of bovine serum albumin (BSA) from ozone-modified alumina (Al<sub>2</sub>O<sub>3</sub>) particles during caustic alkali cleaning was studied. Al<sub>2</sub>O<sub>3</sub> particles were treated with gaseous ozone generated from pure oxygen at concentrations of 0.05 to 0.2 vol%. As a result of ozone treatment, the absolute values of the surface charge density of Al<sub>2</sub>O<sub>3</sub> particles decreased, with slight shifts in the apparent points of zero charge to the points corresponding to more acidic pH values, and the amount of BSA adsorbed on Al<sub>2</sub>O<sub>3</sub> also decreased. The desorption curve of BSA, which was obtained by plotting the logarithm of the amount of residual BSA versus cleaning time, could be analyzed by the integrated desorption kinetic model which describes two simultaneous first-order reactions. The desorption curves of BSA from non-ozone-treated and ozone-treated particles could apparently be reduced to the sum of two independent first-order reactions occurring simultaneously at different rates, suggesting that a faster-desorbing and slower-desorbing BSA species were present on Al<sub>2</sub>O<sub>3</sub> surfaces. It was found that the effect of ozone modification of Al<sub>2</sub>O<sub>3</sub> surfaces was reflected both by an increase in the desorption rate constant, by one order of magnitude, of a slower-desorbing BSA species and by a decrease in its relative abundance on Al<sub>2</sub>O<sub>3</sub> surfaces.

Journal

  • Journal of The Surface Finishing Society of Japan

    Journal of The Surface Finishing Society of Japan 53(5), 341-345, 2002-05-01

    The Surface Finishing Society of Japan

References:  23

Codes

  • NII Article ID (NAID)
    10008556650
  • NII NACSIS-CAT ID (NCID)
    AN1005202X
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    09151869
  • NDL Article ID
    6156960
  • NDL Source Classification
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL Call No.
    Z17-291
  • Data Source
    CJP  NDL  J-STAGE 
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