A recent paper from this hospital (Morrison, Bass, Davis, Hobson, Madsen and Masters, 1957) reported that about one half of the children under 2 years of age admitted because of acute respiratory infections had haemoglobin concentrations below 11 g. per 100 ml. The purposes of the present investigation were to determine the distribution of the haemoglobin levels in children between 3 months and...

OBJECTIVES To compare the safety and efficacy of iron carboxymaltose with ferrous sulfate to treat iron deficiency anemia in the post partum. METHODS Patients were randomized (2:1 ratio) to receive iron carboxymaltose (up to 3 weekly doses of 1000 mg maximum, applied in 15 min; n=227) or ferrous sulfate (100 mg twice daily, 12 weeks; n=117). Changes in hemoglobin and iron stores up to week 12...

28 Fenton’s reagent, a solution of hydrogen peroxide and ferrous iron catalyst, is used for an 29 in-situ chemical oxidation of organic contaminants. Sulfuric acid is commonly used to 30 create an acidic condition needed for catalytic oxidation. Fenton’s reaction often involves 31 pressure buildup and precipitation of reaction products, which can cause safety hazards 32 and diminish efficiency....

Anaerobic oxidation of methane (AOM) is crucial for controlling the emission of this potent greenhouse gas to the atmosphere. Nitrite-, nitrate-, and sulfate-dependent methane oxidation is well-documented, but AOM coupled to the reduction of oxidized metals has so far been demonstrated only in environmental samples. Here, using a freshwater enrichment culture, we show that archaea of the order ...

Ferritins are a class of iron storage and mineralization proteins found throughout the animal, plant, and microbial kingdoms. Iron is stored within the protein shell of ferritin as a hydrous ferric oxide nanoparticle with a structure similar to that of the mineral "ferrihydrite." The eight hydrophilic channels that traverse the protein shell are thought to be the primary avenues by which iron g...

Ferrous iron has been known to function as an electron source for iron-oxidizing microorganisms in both anoxic and oxic environments. A diversity of bacteria has been known to oxidize both soluble and solid-phase Fe(II) forms coupled to the reduction of nitrate. Here, we show for the first time Fe(II) oxidation by Sphaerotilus natans strain DSM 6575(T) under mixotrophic condition. Sphaerotilus ...

The total concentration and redox state of iron were examined along a transect across the continental shelf off the Peruvian coast during. January 1984. Total and dissolved iron (0.4~pm filter) were measured by the Co-APDC coprecipitation method. Fe(II) was measured by a preconcentration step with S-hydroxyquinoline bonded to silica as the stationary phase, followed by elution and the ferrozine...

Bacteria evolved over millennia in the presence of the vital micronutrient iron. Iron is involved in numerous processes within the cell and is essential for nearly all living organisms. The importance of iron to the survival of bacteria is obvious from the large variety of mechanisms by which iron may be acquired from the environment. Random mutagenesis and global gene expression profiling led ...

The synthetic cubane-type iron–sulfur clusters [Fe4S4(SR)4] form a four-member electron transfer series (z 3 , 2 , 1 , and 0), all members of which except that with z 0 have been isolated and characterized. They serve as accurate analogues of protein-bound [Fe4S4(SCys)4] redox centers, which, in terms of core oxidation states, exhibit the redox couples [Fe4S4] /2 and [Fe4S4] /1 . Clusters with ...

Diverse bacteria are known to oxidize millimolar concentrations of ferrous iron [Fe(II)] under anaerobic conditions, both phototrophically and chemotrophically. Yet whether they can do this under conditions that are relevant to natural systems is understood less well. In this study, we tested how light, Fe(II) speciation, pH, and salinity affected the rate of Fe(II) oxidation by Rhodobacter cap...