Production of Gold Nanoparticles by Biogenesis Using Bacteriaстатья
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Дата последнего поиска статьи во внешних источниках: 6 апреля 2016 г.
Аннотация:Diazotrophic cyanobacteria Anabaena sp. PCC 7120, four Nostoc strains, and two Azotobacter spe-
cies (A. vinelandii and A. chroococcum) were found to produce gold nanoparticles (GNP) under nitrogen fix-
ation conditions. GNP biogenesis occurred at AuHCl4 concentrations from 0.1 to 1 mM. In the cultures of
unicellular cyanobacteria Synechococcus sp. PCC 7942 and Synechocystis sp. PCC 6803 incapable of nitrogen
fixation, no GNP were formed at the same concentrations of gold salts. The plasmon resonance band peak
was located at 552 nm. This position is characteristic of spherical GNP 10 to 30 nm in size. Small amounts of
GNP were also formed in the culture liquid supernatants of the tested nitrogen-fixing bacteria at AuHCl4
concentrations from 0.25 to 0.5 mM.