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Proceedings Paper

Light scattering spectra of sulfur-reducing bacteria Desulfuromonas acetoxidans under the influence of ions Fe metals
Author(s): Oleksandr I. Bilyy; Oresta M. Vasyliv; Svitlana O. Hnatush
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Paper Abstract

Desulfuromonas acetoxidans are uncoloured gram-negative sulfur bacteria that inhabit sulfur containing aquatic environments. These are gram-negative obligatory anaerobes that have an ability to reduce S0 to H2S and Fe3+ to Fe2+ in the processes of dissimilation Sulfur- and Fe (III)-reduction. Existence of Sulfur and Ferric ions in the anaerobic sediments causes binding of hydrogen sulfide which diffuses from the zone of sulfur reducing. As a result hydrogen sulfide is detoxificated. The ability of these bacteria to use Sulfur or Ferric ions as acceptors of electrons during organic carbon oxidation causes their special adaptation to the changes of surrounding environment. Interaction between bacterial Desulfuromonas acetoxidans cells and different concentrations of ferrous Fe2+ and ferric Fe3+ ions possibly could cause the changes of cells' light scattering characteristics. The changes of cells relative content and their size distribution during five days of cultivation under the influence of FeSO4 and FeCl3×6H2O in concentration from 0.01 to 10 mM was investigated by the new method of measurement. It includes sounding of flow suspended bacterial cells by monochromatic coherent light, registration of signals of co-operation of sounding radiation with the explored microbiological objects by detects of the changes of amplitudes and durations of scattered light impulses. Under the influence from 0.01 to 10 mM of FeSO4 the maximum of cells' size distribution changed from 0.55 to 0.62 μm and effect of investigated range of FeCl3×6H2O concentrations caused it changes from 0.43 to 0.49 μm during five days of sulfurreducing Desulfuromonas acetoxidans bacteria growth.

Paper Details

Date Published: 22 November 2011
PDF: 7 pages
Proc. SPIE 8338, Tenth International Conference on Correlation Optics, 83381I (22 November 2011); doi: 10.1117/12.916150
Show Author Affiliations
Oleksandr I. Bilyy, Ivan Franko National Univ. of Lviv (Ukraine)
Oresta M. Vasyliv, Ivan Franko National Univ. of Lviv (Ukraine)
Svitlana O. Hnatush, Ivan Franko National Univ. of Lviv (Ukraine)

Published in SPIE Proceedings Vol. 8338:
Tenth International Conference on Correlation Optics
Oleg V. Angelsky, Editor(s)

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