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Comparison of pulsed and CW ultraviolet light sources to inactivate bacterial spores on surfaces

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3 Author(s)
McDonald, K.F. ; Electr. Eng. Dept., Univ. of Missouri-Columbia, Columbia, MO, USA ; Curry, R.D. ; Hancock, P.J.

The University of Missouri-Columbia is optimizing photosensitized UV processes for the decontamination of surfaces. The biological inactivation results obtained with high-power pulsed xenon flashlamps are compared to those of a continuous-wave medium-pressure mercury-argon lamp. The inactivation mechanisms associated with pulsed and continuous-wave multispectral light sources, which are used synergistically with a hydrogen peroxide photosensitizer, are discussed. Typically, the process yields more than six logs reduction of Bacillus subtilis spores on various surfaces.

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Plasma Science, IEEE Transactions on  (Volume:30 ,  Issue: 5 )