PURPOSE This study examined the impact of 10 d of exercise-heat acclimation on sweat mineral concentrations. METHODS Eight male subjects walked on a treadmill at 3.5 mph, 4% grade for 100 continuous minutes or until rectal temperature reached 39.5 degrees C on 10 consecutive days in an environmental chamber set at 45 degrees C, 20% relative humidity. Arm sweat samples were collected during th...

Potato consumption provides significant dietary contributions to several essential minerals, but the effects of cultivar and planting site are not well-understood. The mineral content of 16 cultivars, grown at 5 locations, was measured using inductively coupled plasma-optical emission spectroscopy and evaluated on a per serving basis for percent recommended daily intake (% RDI), emphasizing som...

BACKGROUND Andean indigenous crops such as quinoa (Chenopodium quinoa), kiwicha (Amaranthus caudatus) and kañiwa (Chenopodium pallidicaule) seeds are good sources of minerals (calcium and iron). Little is known, however, about mineral bioavailability in these grains. Thus the aim of the present study was to determine the iron, calcium and zinc potential availability in raw, roasted and boiled q...

Many different species of acidophilic prokaryotes, widely distributed within the domains Bacteria and Archaea, can catalyze the dissimilatory oxidation of ferrous iron or reduction of ferric iron, or can do both. Microbially mediated cycling of iron in extremely acidic environments (pH < 3) is strongly influenced by the enhanced chemical stability of ferrous iron and far greater solubility of f...

Several strategies have been identified to address micronutrient malnutrition, including dietary diversification, nutrient supplementation, increased public health measures, and food fortification. Of these, food fortification is the most effective intervention to deliver vitaminand mineral-rich food to a large population. Fortification involves adding minute quantities of nutrients, such as vi...

Vitamin and mineral supplementation is often prescribed by physicians to meet the additional nutrient requirements of pregnancy. In order to partially ascertain the effectiveness of these prenatal supplements, the retention of calcium and iron was determined in pregnant women consuming supplemented or unsupplemented self-selected diets. The retention of phosphorus and magnesium, minerals not in...

Dissimilatory metal-reducing bacteria (DMRB) utilize numerous compounds as terminal electron acceptors, including insoluble iron oxides. The mechanism(s) of insoluble-mineral reduction by DMRB is not well understood. Here we report that extracellular melanin is produced by Shewanella algae BrY. The extracted melanin served as the sole terminal electron acceptor. Upon reduction the reduced, solu...

The mineral status in two ecosystems typical of the Iberian Peninsula was evaluated. Ecosystem I was formed by forests and ecosystem II by hilly areas. The levels of calcium, phosphorus, magnesium, iron, copper, zinc and selenium in soils, rations and serum were measured. The concentratons of iron, copper, zinc and selenium were also checked in liver. Ecosystem I showed higher values of every m...

Little is known about the importance and/or mechanisms of biological mineral oxidation in sediments, partially due to the difficulties associated with culturing mineral-oxidizing microbes. We demonstrate that electrochemical enrichment is a feasible approach for isolation of microbes capable of gaining electrons from insoluble minerals. To this end we constructed sediment microcosms and incubat...

This study was carried out to determine the mineral concentrations in the hair and serum of normal pregnant women and hair mineral concentrations in cases of obstetric disorders. The hair mineral concentrations were analyzed by inductively coupled plasma atomic emission spectrometry. Serum mineral concentrations were analyzed by the established method. The following results and conclusions were...