Influence of Atomic and Singlet Molecular Oxygen Generated by RF Plasma on Reduction of Protein

RF plasma was applied for the reduction of human blood and bovine blood in which essential proteins to lives were included. Atomic oxygen and singlet molecular oxygen are significantly important for the treatment of protein by RF oxygen plasma. The reduction rate of the protein was analysed by FTIR spectra, and the light emitted from oxygen plasma was detected by spectrometer. The ratio of emission intensity from atomic oxygen and singlet molecular oxygen strongly depended upon the pressure in the chamber. Irradiation time of the oxygen plasma was obviously related to the reduction rate of the protein. It was found that the reduction rate of protein correlated with the light intensity from atomic oxygen at 777 nm and singlet molecular oxygen at 762 nm.