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Applied and Environmental Microbiology, December 2001, p. 5830-5832, Vol. 67, No. 12
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.12.5830-5832.2001

Examination of Peak Power Dependence in the UV Inactivation of Bacterial Spores

Jane K. Rice1,* and Michael Ewell2,dagger

Chemistry Division, Naval Research Laboratory, Washington, D.C. 20375-5342,1 and Center of Marine Biotechnology, Baltimore, Maryland 212022

Received 9 July 2001/Accepted 19 September 2001

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 108 in peak power. Contrary to previous reports, no clear differences in spore survival were observed.

* Corresponding author. Mailing address: Chemistry Division, Code 6111, Naval Research Laboratory, Washington, DC 20375-5342. Phone: (202) 767-0721. Fax: (202) 767-0727. E-mail: rice{at}ccf.nrl.navy.mil.

dagger Present address: BBI Biotech Research Laboratories, Inc., Gaithersburg, MD 20877.

Applied and Environmental Microbiology, December 2001, p. 5830-5832, Vol. 67, No. 12
0099-2240/01/$04.00+0   DOI: 10.1128/AEM.67.12.5830-5832.2001


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