2002
Mechanism of elemental sulfur oxidation by acidophilic bacteria
MANDL, Martin; Pavla ČEŠKOVÁ; Šárka HELÁNOVÁ a Oldřich JANICZEKZákladní údaje
Originální název
Mechanism of elemental sulfur oxidation by acidophilic bacteria
Autoři
MANDL, Martin; Pavla ČEŠKOVÁ; Šárka HELÁNOVÁ a Oldřich JANICZEK
Vydání
Bratislava, Zborník, XVIII. biochemický zjazd, s. 276-276, 2002
Nakladatel
SAV
Další údaje
Jazyk
angličtina
Typ výsledku
Stať ve sborníku
Obor
Biotechnologie a bionika
Stát vydavatele
Slovensko
Utajení
není předmětem státního či obchodního tajemství
Označené pro přenos do RIV
Ano
Kód RIV
RIV/00216224:14310/02:00006462
Organizační jednotka
Přírodovědecká fakulta
Klíčová slova anglicky
sulfur oxidation; sulfur-oxidizing bacteria
Změněno: 9. 10. 2002 16:40, doc. Ing. Martin Mandl, CSc.
Anotace
V originále
We observed sulfur oxidation by both free and adsorbed bacteria. A dominant oxidation role for free bacteria was suggested based on kinetic observations in both growing and non-growing cultures. The linear phase of sulfur oxidation was related to sulfur limitation in agreement with the Monod equation. The active growth phase always followed adsorption of bacteria on sulfur; however, the special metabolic role of adsorbed bacteria was unclear. The presence of the pigment iodinin, an A. ferrooxidans culture metabolite, was demonstrated after growth of bacteria on elemental sulfur. Although its physiological function is unknown, it is possible that sites on the cell surface are covered with this metabolite, thereby facilitating hydrophobic interactions between cell surfaces and sulfur particles. Such an interaction would be important for the adsorption of A. ferrooxidans onto sulfur surfaces, in addition to other possible adsorption mechanisms. The role of adsorbed bacteria may be to solubilize sulfur. But sulfur limitation and oxidation activity of free cells were fundamental to explain kinetic data of sulfur biooxidation.
Návaznosti
| GA525/00/0785, projekt VaV |
| ||
| MSM 143100005, záměr |
|