mater sci mater med ------------------------------------------------------------------------------------------------------------------------------------------ schiiler d formation of magnetosomes in magnetotactic bacteria jmol microbiol biotechnol kirschvink jl, kobayashikirschvink a, diazricci jc and kirschvink sj magnetite in human tissues a mechanism for the biological effects of weak elf magnetic fields bioelectromagnetics suppl van hecke p, marchal g, decrop e and baert al experimental study of the pharmacokinetics and dose response of ferrite particles used as contrast agent in mri of the normal liver of the rabbit invest radiol weissleder r et al superparamagnetic iron oxide pharmacokinetics and toxicity am j roentgenol lawaczeck r et al magnetic iron oxide particles coated with carboxydextran for parenteral administration and liver contrasting preclinical profile of sh ua acta radiol warheit db nanoparticles health impacts?