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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 15 — May. 20, 2006
  • pp: 3659–3664

Effect of washing on identification of Bacillus spores by principal-component analysis of fluorescence data

Joseph Kunnil, Sivananthan Sarasanandarajah, Easaw Chacko, and Lou Reinisch  »View Author Affiliations


Applied Optics, Vol. 45, Issue 15, pp. 3659-3664 (2006)
http://dx.doi.org/10.1364/AO.45.003659


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Abstract

The fluorescence spectra of Bacillus spores are measured at excitation wavelengths of 280, 310, 340, 370, and 400   nm . When cluster analysis is used with the principal-component analysis, the Bacillus globigii spores can be distinguished from the other species of Bacillus spores (B. cereus, B. popilliae, and B. thuringiensis). To test how robust the identification process is with the fluorescence spectra, the B. globigii is obtained from three separate preparations in different laboratories. Furthermore the fluorescence is measured before and after washing and redrying the B. globigii spores. Using the cluster analysis of the first two or three principal components of the fluorescence spectra, one is able to distinguish B. globigii spores from the other species, independent of preparing or washing the spores.

© 2006 Optical Society of America

OCIS Codes
(300.0300) Spectroscopy : Spectroscopy
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence
(300.6540) Spectroscopy : Spectroscopy, ultraviolet

ToC Category:
Spectroscopy

History
Original Manuscript: August 24, 2005
Manuscript Accepted: November 23, 2005

Citation
Joseph Kunnil, Sivananthan Sarasanandarajah, Easaw Chacko, and Lou Reinisch, "Effect of washing on identification of Bacillus spores by principal-component analysis of fluorescence data," Appl. Opt. 45, 3659-3664 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-15-3659


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