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Zeta potential of anoxygenic phototrophic bacteria and Ca adsorption at the cell surface: Possible implications for cell protection from CaCO3 precipitation in alkaline solutions by Irina A. Bundeleva; Liudmila S. Shirokova; Pascale Bénézeth; Oleg S. Pokrovsky; Elena I. Kompantseva; Stephanie Balor is a Chemistry article available to read on EtoBox.
What is Zeta potential of anoxygenic phototrophic bacteria and Ca adsorption at the cell surface: Possible implications for cell protection from CaCO3 precipitation in alkaline solutions about?
Electrophoretic mobility measurements and surface adsorption of Ca on living, inactivated, and heatkilled haloalkaliphilic Rhodovulum steppense, A-20s, and halophilic Rhodovulum sp., S-17-65 anoxygenic phototrophic bacteria (APB) cell surfaces were performed to determine the degree to which these bacteria metabolically control their surface potential equilibria. Zeta potential of both species was measured as a function of pH and ionic strength, calcium and bicarbonate concentrations. For both live APB in 0.1 M NaCl, the zeta potential is close to zero at pH from 2.5 to 3 and decreases to À30 to À40 mV at pH of 5-8. In alkaline solutions, there is an unusual increase of zeta potential with a maximum value of À10 to À20 mV at a pH of 9-10.5. This increase of zeta potential in alkaline solutions is reduced by the presence of NaHCO 3 (up to 10 mM) and only slightly affected by the addition of equivalent amount of Ca. At the same time, for inactivated (exposure to NaN 3 , a metabolic inhibitor) and heat-killed bacteria cells, the zeta potential was found to be stable (À30 to À60 mV, depending upon the ionic strength) between pH 5 and 11 without any increase in alkaline solutions. Adsorp
Who reads Zeta potential of anoxygenic phototrophic bacteria and Ca adsorption at the cell surface: Possible implications for cell protection from CaCO3 precipitation in alkaline solutions?
It is typically read by researchers, students, and practitioners in Chemistry.
- Author
- Irina A. Bundeleva; Liudmila S. Shirokova; Pascale Bénézeth; Oleg S. Pokrovsky; Elena I. Kompantseva; Stephanie Balor
- Publisher
- Elsevier Science; Elsevier ; Elsevier Inc.; Elsevier BV (ISSN 0021-9797)
- Published
- 2011
- Language
- EN
- Field
- Chemistry (Physical Sciences)