Extracellular production of tellurium nanoparticles by the photosynthetic bacterium Rhodobacter capsulatus.

@article{Borghese2016ExtracellularPO,
  title={Extracellular production of tellurium nanoparticles by the photosynthetic bacterium Rhodobacter capsulatus.},
  author={Roberto Borghese and Marco Brucale and Gianuario Fortunato and Massimiliano Lanzi and Alessio Mezzi and Francesco Valle and Massimiliano Cavallini and Davide Zannoni},
  journal={Journal of hazardous materials},
  year={2016},
  volume={309},
  pages={
          202-9
        }
}
The toxic oxyanion tellurite (TeO3(2-)) is acquired by cells of Rhodobacter capsulatus grown anaerobically in the light, via acetate permease ActP2 and then reduced to Te(0) in the cytoplasm as needle-like black precipitates. Interestingly, photosynthetic cultures of R. capsulatus can also generate Te(0) nanoprecipitates (TeNPs) outside the cells upon addition of the redox mediator lawsone (2-hydroxy-1,4-naphtoquinone). TeNPs generation kinetics were monitored to define the optimal conditions… CONTINUE READING
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