Only 9 (11.2%) out of 80 studied bacterial strains were able to utilize iron saturated 2-oxo acids and hydroxyacids and grow on o-phenantroline containing media. These strains belonged to Enterococcus faecalis and Enterococcus faecium species and were isolated from clinical material. Iron sources utilized by all of these strains were Fe(III) complexes with pyruvic, 2-oxobutyric, 4-methylthio-2-...

Restricting the availability of iron is an important strategy for defense against bacterial infection. Mycobacterium tuberculosis survives within the phagosomes of macrophages; consequently, iron acquisition is particularly difficult for M. tuberculosis, because the phagosomal membrane is an additional barrier for its iron access. However, little is known about the iron transport and acquisitio...

Atmospheric deposition of iron (Fe) plays an important role in controlling oceanic primary productivity. However, the sources of Fe in the atmosphere are not well understood. In particular, the combustion sources of Fe and the subsequent deposition to the oceans have been accounted for in only few ocean biogeochemical models of the carbon cycle. Here we used a mass-balance method to estimate th...

The prevalence of nutritional iron deficiency anemia in infants and toddlers has declined dramatically since 1960. However, satisfaction with this achievement must be tempered because iron deficiency anemia in infants and toddlers is associated with long-lasting diminished mental, motor, and behavioral functioning. Additionally, the prevalence of iron deficiency anemia in one- to three-year-old...

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Abstract The atmospheric deposition of soluble (bioaccessible) iron enhances ocean primary productivity and subsequent CO 2 sequestration in iron-limited basins, especially the Southern Ocean. While anthropogenic sources have been recently suggested to be important some northern hemisphere oceans, role Ocean remains ambiguous. By comparing multiple model simulations with new aircraft observatio...

Iron release from melting continental and sea ice is deemed important for phytoplankton, the growth of which iron-limited in Southern Ocean. Both sources are generally considered separately, yet their effects on biological carbon pump could interact. Using a global ocean-sea-ice-biogeochemical model with representation both iron sources, we find them to have an overall additive effect phytoplan...

Previous authors have shown that the transverse relaxivity R(2)* and frequency shifts that characterize gradient echo signal decay in magnetic resonance imaging are closely associated with the distribution of iron and myelin in the brain's white matter. In multiple sclerosis, iron accumulation in brain tissue may reflect a multiplicity of pathological processes. Hence, iron may have the unique ...

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BACKGROUND There is a need to determine whether iron absorption from iron amino acid chelates is protected from inhibition by dietary phytate and regulated normally by iron status. OBJECTIVE The objective of this study was to compare iron absorption from ferrous sulfate, ferrous bisglycinate, and ferric trisglycinate in whole-maize meal; to determine whether iron from ferrous bisglycinate and...