Iron-containing nanoparticles from microbial metabolism

A Method for Introduction of Magnetic Nanoparticles into Tissues by Means of Magnetic Field Gradient: An Experimental Study

“…Previous studies have shown that the bacteria synthesized ferrihydrite (5Fe 2 O 3 ×9H 2 O) nanoparticles in the course of their vital activity [6,7]. Ferrihydrite is an antiferromagnetic.…”

Characterization of biogenic ferrihydrite nanoparticles by means of SAXS, SRD and IBA methods

“…The investigated samples are ferrihydrite nanoparticles produced by bacteria Klebsiella Oxytoca in the course of biomineralization of iron salt solutions from natural environment [5][6][7]. The bacterial biomass isolated from the sapropel obtained from the Lake Borovoe (Krasnoyarsk region) was grown under microaerophilic conditions on a Lovley medium of composition (g/L) NaHCO3, 2.5; CaCl2· H2O, 0.1; KCl, 0.1; NH4Cl, 1.5; and NaH2PO4·H2O, 0.6.…”

“…), bacterium Klebsiella oxytoca creates, as was established in previous works [6][7][8][9][10][11] different types of ferrihydrite nanoparticles. Two types of ferrihydrite nanoparticles (Fe12 and Fe34), separated from a bacterial biomass grown during 8 and 21 days, respectively, were accurately identified by means of Mossbauer spectroscopy [7] and static magnetic measurements analysis [8].…”

Nanotoxicology of Metal Oxide Nanoparticles

“…Toxic effects and morphological changes in the peripheral blood cells were not observed from bacterial synthesized magnetic iron oxide nanoparticles [38]. Biogenic ferrihydrite (Fe2O3 nH2O) nanoparticles that were synthesized by the bacteria Klebsiella oxytoca demonstrated composites in which amorphous or crystalline nanomaterials were observed with organic molecules [39][40][41]. Dissimilatory Fe(III)-reducing bacteria, such as Geobacter metallireducens and Shewanella putrifaciens, produce magnetite (nanocrystals) as a by-product of their metabolism in a growth medium [42].…”