OBJECTIVE We compared the effects of different kinds of bread fermentation on mineral bioavailability. METHODS Wistar rats were fed one of the following experimental diets for 21 d: control, reconstituted whole wheat flour (white flour plus bran), yeast bread, and sourdough bread. The apparent mineral absorption and intestinal fermentation were measured in each animal. RESULTS Phytate conte...

Our aim in this study was to create a noninvasive and practical method for evaluating metabolic information on the liver (iron content and lipid infiltration) and spine (bone mineral density and marrow fat degeneration) using double gradient-echo with and without the spectral fat suppression technique (double-GRE-FS). We arranged phantoms made of various concentrations of superparamagnetic iron...

Seven strains of heterotrophic iron-oxidizing acidophilic bacteria were examined to determine their abilities to promote oxidative dissolution of pyrite (FeS2) when they were grown in pure cultures and in mixed cultures with sulfur-oxidizing Thiobacillus spp. Only one of the isolates (strain T-24) oxidized pyrite when it was grown in pyrite-basal salts medium. However, when pyrite-containing cu...

Our aim in this study was to create a noninvasive and practical method for evaluating metabolic information on the liver (iron content and lipid infiltration) and spine (bone mineral density and marrow fat degeneration) by using double gradient-echo with and without the spectral fat suppression technique (double-GRE-FS). We arranged phantoms made of various concentrations of superparamagnetic i...

As a commensal and opportunistic pathogen, Candida albicans possesses a range of determinants that contribute to survival, persistence and virulence. Among this repertoire of fitness and virulence attributes are iron acquisition factors and pathways, which allow fungal cells to gain this essential mineral in the iron-poor environment of the host. The aim of this review is to present the strateg...

Electrodeposition has been widely used for the low-cost formation of large-area thin films of various crystalline materials. In this work, we use thermodynamic calculations to guide electrochemical experiments, in which we conduct a systematic investigation of crystalline iron sulfides formation on electrically poised iron substrates in H2S aqueous solutions. Whereas thermodynamic calculations ...

Analysis of a global compilation of dissolved-iron observations provides insights into the processes controlling iron distributions and some constraints for ocean biogeochemical models. The distribution of dissolved iron appears consistent with the conceptual model developed for Th isotopes, whereby particle scavenging is a two-step process of scavenging mainly by colloidal and small particulat...

Introduction: Microbe-mineral interactions and biosignature preservation in oxidized sulfidic ore bodies (gossans) are prime candidates for astrobiological study. Such oxidized iron systems have been proposed as analogs for some Martian environments [1]. Recent studies identified microbial fossils preserved as mineral-coated filaments [2,3,4,5,6,7,8,9]. This study documents microbially-mediated...

Background: Iron is an essential mineral for normal cellular physiology but its ‎overload can lead to cell injury. For many years, deferoxamine injection has been used ‎as an iron chelator for treatment of iron overload. The aim of this study is to compare ‎oral deferoxamine, activated charcoal, and vitamin C, as an absorbent factor of Fe, in ‎changing the serum level of iron in iron overload r...

During primary colonization of rock substrates by plants, mineral weathering is strongly accelerated under plant roots, but little is known on how it affects soil ecosystem development before plant establishment. Here we show that rock mineral weathering mediated by chemolithoautotrophic bacteria is associated to plant community formation in sites recently released by permanent glacier ice cove...