Treatment of second-order structures of proteins using oxygen radio frequency plasma

Nobuya Hayashi, Akari Nakahigashi, Hao Liu, Masaaki Goto

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


Decomposition characteristics of second-order structures of proteins are determined using an oxygen radio frequency (RF) plasma sterilizer in order to prevent infectious proteins from contaminating medical equipment in hospitals. The removal of casein protein as a test protein with a concentration of 50 mg/cm2 on the plane substrate requires approximately 8 h when singlet atomic oxygen is irradiated. The peak intensity of Fourier transform infrared spectroscopy (FTIR) spectra of the β-sheet structures decreases at approximately the same rate as those of the α-helix and first-order structures of proteins. Active oxygen has a sufficient oxidation energy to dissociate hydrogen bonds within the β-sheet structure.

Original languageEnglish
Article number08JH02
JournalJapanese journal of applied physics
Issue number8 PART 2
Publication statusPublished - Aug 2010
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)


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