Results 301 to 310 of about 1,130,858 (355)
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Bisulfite reduction of soil iron for the reductive degradation of trichloroethylene
Chemosphere, 2022This study explored the potential reactivities of various reductants in inducing subsurface TCE degradation in natural soils. It was found that bisulfite (HSO3-) exhibited the ability to induce reduction in soil iron minerals, and increase the degradation of TCE in the soil slurry system; however, no TCE degradation occurred in the aqueous system.
Yuwen Hou, Chenju Liang
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Reductive mobilisation of ferritin iron
European Journal of Biochemistry, 1985The reductive mobilisation of iron from ferritin, the principal protein of iron storage, was studied. The kinetic characteristics of iron release by dithionite, thioglycollate, and dihydroriboflavin 5'-phosphate (FMNH2) were found to differ widely. The dependence on pH is most pronounced for the dithionite reduction which proceeds 100 times faster at ...
F, Funk +3 more
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Reduction potential of iron in transferrin
Biochimica et Biophysica Acta (BBA) - General Subjects, 1985The reduction potential of Fe3+ in transferrin was measured spectrophotometrically by equilibration with methyl viologen in the presence of sodium dithionite. For an ionic strength near 0.1 M at 25 degrees C and pH 7.3 under 0.048 atm. CO2, half of the iron is reduced at a potential near -0.40 V (vs. standard hydrogen electrode). At least one disulfide
D C, Harris +5 more
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Ferric iron reduction and iron assimilation in Saccharomyces cerevisiae
Journal of Inorganic Biochemistry, 1992We have used the yeast Saccharomyces cerevisiae as a model organism to study the role of ferric iron reduction in eucaryotic iron uptake. S. cerevisiae is able to utilize ferric chelates as an iron source by reducing the ferric iron to the ferrous form, which is subsequently internalized by the cells.
G J, Anderson +5 more
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1984
In the conventional ironing process the maximum reduction per die is limited to 30–40 per cent due to risk of fracture in the wall at the bottom. This means that often 5 or 6 reduction steps are necessary when cups of considerable heights are produced. A theoretical analysis shows that the application of very small die angles, α= 1–4 degs.
N. H. Nielsen, N. Bay, N. K. Frederiksen
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In the conventional ironing process the maximum reduction per die is limited to 30–40 per cent due to risk of fracture in the wall at the bottom. This means that often 5 or 6 reduction steps are necessary when cups of considerable heights are produced. A theoretical analysis shows that the application of very small die angles, α= 1–4 degs.
N. H. Nielsen, N. Bay, N. K. Frederiksen
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Ferric iron reduction by Cryptococcus neoformans
Infection and Immunity, 1997The pathogenic yeast Cryptococcus neoformans must reduce Fe(III) to Fe(II) prior to uptake. We investigated mechanisms of reduction using the chromogenic ferrous chelator bathophenanthroline disulfonate. Iron-depleted cells reduced 57 nmol of Fe(III) per 10(6) cells per h, while iron-replete cells reduced only 8 nmol of Fe(III). Exponential-phase cells
K J, Nyhus, A T, Wilborn, E S, Jacobson
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The influence of iron reduction on the reductive biotransformation of pentachloronitrobenzene
European Journal of Soil Biology, 2007The effect of iron reduction on the microbial reductive transformation of pentachloronitrobenzene (PCNB), an organochlorine fungicide, was investigated with a mixed, methanogenic culture enriched from a contaminated sediment. Fe(III)EDTA, Fe(III)citrate (completely bioavailable) and FeOOH (less bioavailable) were used as the iron source.
Didem Okutman Tas +1 more
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Reduction of Copper(II) by Iron(II)
Journal of Environmental Quality, 2005ABSTRACTLaboratory and field investigations have clearly demonstrated the important role of reduced iron (Fe(II)) in reductive transformations of first‐row transition metal species. However, interactions of Fe(II) and copper (Cu) are not clearly understood. This study examined the reduction of Cu(II) by Fe(II) in stirred‐batch experiments at pH 5.2 and
C J, Matocha +3 more
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1973
A widely observed electronic transition discovered in iron compounds is the reduction from the ferric to the ferrous state. In a series of studies since 1967 such reduction has been observed in perhaps forty to fifty compounds including halides, cyanides, hydrates, salts of organic acids, and a variety of organometallic compounds [1].
H. G. Drickamer, C. W. Frank
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A widely observed electronic transition discovered in iron compounds is the reduction from the ferric to the ferrous state. In a series of studies since 1967 such reduction has been observed in perhaps forty to fifty compounds including halides, cyanides, hydrates, salts of organic acids, and a variety of organometallic compounds [1].
H. G. Drickamer, C. W. Frank
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