Antioxidant Activity of Noble Metal (Gold, Platinum) -Biopolymer Nanocomposites

DOI Web Site 1 Citations 30 References
  • AKIYAMA Shintaro
    Department of Applied Chemistry and Institute of Colloid and Interface Science,
  • YOSHIMURA Tomokazu
    Department of Applied Chemistry and Institute of Colloid and Interface Science,
  • ESUMI Kunio
    Department of Applied Chemistry and Institute of Colloid and Interface Science,

Bibliographic Information

Other Title
  • 金-生体高分子ナノコンポジットの活性酸素消去活性

Search this article

Abstract

Three different gold-biopolymer nanocomposites have been prepared independently in the presence of tetrachloroauric acid and biopolymers like fucoidan, alginic acid and sodium hyaluronate via sodium borohydride reduction. The average particle size of gold nanoparticles using fucoidan becomes smaller, with a decrease of the concentration of fucoidan, ranging from 6.8 nm to 3.2 nm. On the other hand, the average particle sizes of the gold nanoparticles are 3.4 nm-5.4nm for alginic acid and sodium hyaluronate cases and independent of the biopolymer concentrations. The antioxidant activities of the gold-biopolymer nanocomposites upon elimination of hydroxyl radicals formed in an H2O2/FeSO4 system have been examined using a spin-trapping method. The gold-biopolymer nanocomposites exhibit high catalytic activities that are affected by the concentration and the kind of the biopolymer. The highest antioxidant activity obtained by the gold-alginic acid nanocomposites has been observed to be 60 times higher than that of ascorbic acid.

Journal

Citations (1)*help

See more

References(30)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top