Examination of peak power dependence in the UV inactivation of bacterial spores.
We examine whether the rate of delivery of photons from a UV radiation source has an effect on the inactivation of spores. We directly compare the output of a high-peak-power UV laser source at 248 nm to a low-power continuous lamp source (254 nm) in the inactivation of Bacillus subtilis spores. The two UV sources differ by a factor of 10(8) in peak power. Contrary to previous reports, no clear differences in spore survival were observed.
Rice
J K
JK
Chemistry Division, Naval Research Laboratory, Washington, DC 20375-5342, USA. rice@ccf.nrl.navy.mil
Ewell
M
M
D001412:Bacillus subtilis / Q000502:physiology* / Q000528:radiation effects*; D017785:Photons; D013171:Spores, Bacterial / Q000502:physiology / Q000528:radiation effects; D014466:Ultraviolet Rays