Lovley, D.R., Roden, E.E., Phillips, E.J.P. and Woodward, J.C., 1993. Enzymatic iron and uranium reduction by sulfatereducing bacteria. In: R.J. Parkes, P. Westbroek and J.W. de Leeuw (Editors), Marine Sediments, Burial, Pore Water Chemistry, Microbiology and Diagenesis. Mar. Geol., 113: 41-53. The potential for sulfate-reducing bacteria (SRB) to enzymatically reduce Fe(III) and U(VI) was inves...

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...

We report a facile and environmentally friendly approach to prepare Ag-Fe₃O₄-silk fiber nanocomposites. The Ag-Fe₃O₄-silk fiber acts as: (i) a biocompatible support for the silver nanoparticles; and (ii) a reducing agent for the silver ions. Neither additional reducing agents nor toxic organic solvents were used during the preparation process. The Ag-Fe₃O₄-silk fiber nanocomposites can be actua...

Generalized arc consistency (GAC) is one of the most fundamental properties for reducing the search space when solving constraint satisfaction problems (CSPs). Consistencies stronger than GAC have also been shown useful, but the challenge is to develop efficient and simple filtering algorithms. Several CSP transformations are proposed recently so that the GAC algorithms can be applied on the tr...

the effect of different solvent systems on the extraction of antioxidant and anti radical agents of grape seed was studied. for this purpose 6 different solvent systems with similar polarity and different selectivity were used to prepare grape seed extract. extraction efficiency, reducing activity, radical scavenging property and the effect of each extract on the increase of thermal resistance ...

Bleomycin 1s a glycopeptidlc antlblotlc used for the treatment of cancer [l] . In vitro, a major effect of bleomycm 1s the mtroduction of strand breaks into DNA [2,3]. Efficient breakage of DNA by bleomycm requues the presence of reducing agents, such as 2-mercaptoethanol, dltiothreitol, ascorbate, or hydrogen peroxlde [3,4]. Although reducing agents alone are injurious to DNA [5,6], the combin...

[1] High-resolution x-ray diffraction provides evidence that potassium (K) alloys with iron (Fe) when the two pure elements are heated together at pressures above 26 gigapascals (GPa). Increases of 2–3% in volume of the e (hexagonal close packed: hcp) high-pressure phase of Fe can be attributed to the incorporation of 1 atomic% ( 7000 ppm by weight) K into Fe. Our results provide experimental s...

A number of alcohols, aldehydes, and carboxylic acids were oxidized under mild conditions (60-80°C, 3 M H2S04 in water) by Fe(II1) using a catalytic amount of Pt black to generate Fe(I1) and protons. The extent of oxidation depended on the structures of the organic reductant and on reaction conditions. A redox fuel cell that catalyzed the complete oxidation of ethylene glycol by dioxygen at 80°...

OBJECTIVE To combine evidence from randomized controlled trials to assess the effect of Fe-fortified foods on mean Hb concentration in children (<10 years). DESIGN We conducted a meta-analysis of randomized, controlled, Fe-fortified feeding trials that evaluated Hb concentration. The weighted mean difference was calculated for net changes in Hb by using random-effects models. Meta-regression ...