Temperature distribution in Escherichia coli liquid suspensions during irradiation by a high-power Nd:YAG laser for sterilization applications

Wang, R. K., Watson, I. A. , Ward, G. D., Stewart-Tull, D. E. S. and Wardlaw, A. C. (1997) Temperature distribution in Escherichia coli liquid suspensions during irradiation by a high-power Nd:YAG laser for sterilization applications. Journal of Biomedical Optics, 2(3), p. 295. (doi:10.1117/12.275338)

Wang, R. K., Watson, I. A. , Ward, G. D., Stewart-Tull, D. E. S. and Wardlaw, A. C. (1997) Temperature distribution in Escherichia coli liquid suspensions during irradiation by a high-power Nd:YAG laser for sterilization applications. Journal of Biomedical Optics, 2(3), p. 295. (doi:10.1117/12.275338)

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Publisher's URL: http://dx.doi.org/10.1117/12.275338

Abstract

A time-dependent, heat diffusion equation was used to predict the three-dimensional temperature distribution of <i>Escherichia coli</i> in liquid-suspension during irradiation by a high-power Nd:YAG laser. The model may be used to calculate the temperature rise and the transient 3-D temperature profile in the liquid suspension under arbitrary combinations of laser wavelength, pulse shape, pulse width, repetition rate, energy density, and for different concentrations of bacteria. The temperature profiles in the liquid, for a range of energy densities, were measured to validate the theoretical model. The experimental results were in good agreement with the theoretical ones. A temperature gradient was found in the sample in the radial and axial directions during laser irradiation. The model enables the parameters that affect the temperature distribution of the liquid suspension to be identified and optimized when designing laser sterilization systems.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Stewart-Tull, Prof Duncan and Wardlaw, Prof Alastair and Watson, Dr Ian
Authors: Wang, R. K., Watson, I. A., Ward, G. D., Stewart-Tull, D. E. S., and Wardlaw, A. C.
College/School:College of Medical Veterinary and Life Sciences > Institute of Infection Immunity and Inflammation
College of Medical Veterinary and Life Sciences > School of Life Sciences
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:Journal of Biomedical Optics
Publisher:Society of Photo-optical Instrumentation Engineers
ISSN:1083-3668
ISSN (Online):1560-2281
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