Shama_IEEE_Transactions_on_Plasma_Science_34_4.pdf (230.63 kB)
Download fileModeling the inactivation kinetics of Bacillus subtilis spores by nonthermal plasmas
journal contribution
posted on 2009-01-16, 11:43 authored by Stefano Perni, Xu-Tao Deng, Gilbert Shama, Michael G. KongThe inactivation performances of different nonthermal
plasmas are often compared with each other in terms of their
decimal reduction values, typically obtained by linearizing selected
segments of their inactivation curves. However, this approach is
subjective and can result in uncertainties in the prediction of this
parameter. To overcome this, in this paper, the application of
models capable of describing inactivation curves in their entirety is
considered. The authors employ the Baranyi and Weibull models,
both commonly used for microbial inactivation by heat. An empirical
model based on a third-order polynomial to seek greater accuracy
is further proposed. Using these three inactivation models,
predictions of decimal reduction values for 11 plasma inactivation
studies of Bacillus subtilis spores are obtained and compared with
their reported values. Although the agreement obtained between
these different approaches is generally fair, the current practice of
segmented linearization is shown to be overly simplistic. A rigorous
model is therefore critical to capture the essentially nonlinear
character of plasma inactivation kinetics and hence allow for
an objective comparison of the performances of similar biocidal
nonthermal plasmas.
History
School
- Mechanical, Electrical and Manufacturing Engineering
Citation
PERNI, S. ... et al, 2006. Modeling the inactivation kinetics of Bacillus subtilis spores by nonthermal plasmas. IEEE Transactions on Plasma Science, 34 (4), part 2, pp. 1297-1303Publisher
© IEEEVersion
- VoR (Version of Record)
Publication date
2006Notes
This article was published in the journal, IEEE Transactions on Plasma Science [© IEEE] and is also available at: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=27&year=2006 Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.ISSN
0093-3813Language
- en