Does aqueous fullerene inhibit the growth of Saccharomyces cerevisiae or Escherichia coli?

Studies reporting on potentially toxic interactions between aqueous fullerene nanoparticles (nC(60)) and microorganisms have been contradictory. When known confounding factors were avoided, growth yields of Saccharomyces cerevisiae and Escherichia coli cultured in the presence and absence of independently prepared lots of underivatized nC(60) were found not to be significantly different.