Visible Light-Induced Bactericdal Species Generated From Silver-Loaded Hydrogen Zirconium Phosphate Active Against Escherichia coli K12.

• MIYOSHI HIROKAZU

  Radioisotope Research Center, The University of Tokushima

• TANABE ASAKA

  Department of Biological Science and Technology, Faculty of Engineering, The University of Tokushima

• MAEDA TAKUYA

  Department of Biological Science and Technology, Faculty of Engineering, The University of Tokushima

• KOURAI HIROKI

  Department of Biological Science and Technology, Faculty of Engineering, The University of Tokushima

抄録

Hydroxyl radical (OH ·) was produced under visible light as an oxidized product and superoxide anion (O₂ ·) as a reduced product from silver-loaded hydrogen zirconium phosphate [Ag_1-xH_xZr₂ (PO₄) ₃] suspension in air. These radicals showed the electron spin resonance (ESR) spectra of 5, 5-dimethyl-1- pyrroline-N-oxide (DMPO) adducts, and usually only DMPO-OH can be obtained because of the rates of reaction between DMPO and OH · and O2 · The ESR spectrum of DMPO-O₂- emanated in the presence of I^- because I^- is a trapping reagent of OH ·.I^- acted first as an inhibitor and finally as did the bactericidal species in the bactericidal activity against Escherichia coli. I₂ formed from the reaction between OH · and I^-.This indicated that OH · was a bactericidal species. OH · produces (CH₃) ₂ C · OH and CH₃C · H OH from ethyl alcohol and isopropyl alcohol because the redox potential of OH · is much more positive than those of the alcohols. Those radicals showed stronger bactericidal activities than OH ·. We propose that the strong reducing species has higher bactericidal activity against E. coil than the strong oxidizing species.

収録刊行物

• Ｂｉｏｃｏｎｔｒｏｌ　Ｓｃｉｅｎｃｅ

  Ｂｉｏｃｏｎｔｒｏｌ　Ｓｃｉｅｎｃｅ 6 (2), 69-74, 2001

  日本防菌防黴学会

キーワード

• Silver-loaded hydrogen zirconium phosphate
• Bactericidal species
• Superoxide radical
• Ccentered radical
• ESR

詳細情報

• CRID: 1390001204464897664
• NII論文ID: 10011318236
• NII書誌ID: AA11169621
• DOI: 10.4265/bio.6.69
• COI: 1:CAS:528:DC%2BD3MXntlels7Y%3D
• ISSN: 18840205
• ISSN: 13424815
• ISSN: http://id.crossref.org/issn/13424815
• 本文言語コード: en
• データソース種別:
  • JaLC
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可