Rod-shaped bacteria capable of oxidizing ferrous iron at 55 degrees C were cultured from samples of a copper mine leach dump. Yeast extract or cysteine was required by these Thiobacillus-like bacteria for growth, using ferrous iron as an energy source.

simulation using a commercially available computational fluid dynamics package (FLUENT) were adopted to investigate complex behavior involving hydrodynamics and ferrous biological oxidation in a gas–liquid bubble column reactor. By combining the hydrodynamics and chemical species transport equations, the velocity field, air volume fraction and ferrous biooxidation rate in the column were simula...

BACKGROUND Recent studies in humans suggest that ferritin iron in soybeans has high bioavailability. However, direct evidence for this is lacking because the soybeans were intrinsically labeled; thus, iron bound to other ligands, such as phytate, was also labeled. OBJECTIVE The objectives of the study were to evaluate the absorption of iron from extrinsically labeled, purified ferritin (horse...

The equilibrium constants for the tryptophan binding to indoleamine 2,3-dioxygenase, a protohemoprotein, in its ferric (Fe3+), ferrous (Fez+), and CO-bound (Fea+CO) forms were determined by the spectrophotometric titration method. All these enzyme derivatives showed marked spectral changes upon tryptophan binding. Such a spectral change for the ferric enzyme was, however, specific to the L isom...

Heme a is a redox cofactor unique to cytochrome c oxidases and vital to aerobic respiration. Heme a differs from the more common heme b by two chemical modifications, the C-8 formyl group and the C-2 hydroxyethylfarnesyl group. The effects of these porphyrin substituents on ferric and ferrous heme binding and electrochemistry were evaluated in a designed heme protein maquette. The maquette scaf...

BACKGROUND Although ferric pyrophosphate is a promising compound for iron fortification of foods, few data are available on the effect of food matrices, processing, and ascorbic acid on its bioavailability. OBJECTIVE We compared the relative bioavailability (RBV) of ferrous sulfate in an experimental form of micronized dispersible ferric pyrophosphate (MDFP) in a wheat-milk infant cereal give...

Introduction: Increased iron requirements to supply the expanding blood volume of the mother and the rapidly growing fetus and placenta can cause iron deficiency anemia.Plenty of oral iron formulations are available.A comparative study was planned to find out the best oral iron supplement for improving iron deficiency anemia in pregnant females as well as to compare their tolerability, as this ...