Investigation of elemental sulfur speciation transformation mediated by Acidithiobacillus ferrooxidans.
Curr Microbiol
; 58(4): 300-7, 2009 Apr.
Article
em En
| MEDLINE
| ID: mdl-19085035
ABSTRACT
The speciation transformation of elemental sulfur mediated by the leaching bacterium Acidithiobacillus ferrooxidans was investigated using an integrated approach including scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, energy dispersive X-ray spectroscopy, and X-ray absorption near edge spectroscopy (XANES). Our results showed that when grown on elemental sulfur powder, At. ferrooxidans ATCC23270 cells were first attached to sulfur particles and modified the surface sulfur with some amphiphilic compounds. In addition, part of the elemental sulfur powder might be converted to polysulfides. Furthermore, sulfur globules were accumulated inside the cells. XANES spectra of these cells suggested that these globules consisted of elemental sulfur bound to thiol groups of protein.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Enxofre
/
Acidithiobacillus
/
Microanálise por Sonda Eletrônica
Idioma:
En
Ano de publicação:
2009
Tipo de documento:
Article