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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 1 — Jan. 4, 2012

Effect of Sample Thickness on the Extracted Near-Infrared Bulk Optical Properties of Bacillus subtilis in Liquid Culture

Elitsa Dzhongova, Colin R. Harwood, and Suresh N. Thennadil

Applied Spectroscopy, Vol. 65, Issue 11, pp. 1314-1320 (2011)


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Abstract

In order to determine the bulk optical properties of a <i>Bacillus subtilis</i> culture during growth phase we investigated the effect of sample thickness on measurements taken with different measurement configurations, namely total diffuse reflectance and total diffuse transmittance. The bulk optical properties were extracted by inverting the measurements using the radiative transfer theory. While the relationship between reflectance and biomass changes with sample thickness and the intensity (absorbance) levels vary significantly for both reflectance and transmittance measurements, the extracted optical properties show consistent behavior in terms of both the relationship with biomass and magnitude. This observation indicates the potential of bulk optical properties for building models that could be more easily transferable compared to those built using raw measurements.

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Vol. 7, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Elitsa Dzhongova, Colin R. Harwood, and Suresh N. Thennadil, "Effect of Sample Thickness on the Extracted Near-Infrared Bulk Optical Properties of Bacillus subtilis in Liquid Culture," Appl. Spectrosc. 65, 1314-1320 (2011)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=as-65-11-1314


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