A family of soluble, reduced iron-sulfur clusters with nuclearities 4, 8, and 16 having tertiary phosphine ligation and based on the Fe(4)S(4) cubane-type structural motif has been synthesized. The results of this investigation substantially extend and improve the results of our original work on iron-sulfur-phosphine clusters (Goh, C.; Segal, B. M.; Huang, J.; Long, J. R.; Holm, R. H. J. Am. Ch...

Reduction of Fe(3+) to Fe(2+) is a prerequisite for Fe uptake by tomato roots. Ferric chelate reductase activity in plasma membranes (PM) isolated from roots of both iron-sufficient (+Fe) and iron-deficient (-Fe) tomatoes (Lycopersicon esculentum Mill.) was measured as NADH-dependent ferric citrate reductase and exhibited simple Michaelis-Menten kinetics for the substrates, NADH and Fe(3+)(citr...

A series of bimetallic, trigonal bipyramidal clusters of type {[Co(N-N)(2)](3)[Fe(CN)(6)](2)} are reported. The reaction of {Co(tmphen)(2)}(2+) with [Fe(CN)(6)](3)(-) in MeCN affords {[Co(tmphen)(2)](3)[Fe(CN)(6)](2)} (1). The cluster can exist in three different solid-state phases: a red crystalline phase, a blue solid phase obtained by exposure of the red crystals to moisture, and a red solid...

Humic acid (HA) modifying Fe(3)O(4) nanoparticles (Fe(3)O(4)/HA) was developed for removal of Rhodamine B from water. Fe(3)O(4)/HA was prepared by a coprecipitation procedure with cheap and environmentally friendly iron salts and HA. TEM images revealed the Fe(3)O(4)/HA (with ≈ 10 nm Fe(3)O(4) cores) were aggregated as aqueous suspensions. With a saturation magnetization of 61.2 emu/g, the Fe(3...

BACKGROUND This study explored the pharmacokinetic parameters and tissue distribution of magnetic iron oxide nanoparticles (Fe(3)O(4) MNPs) in imprinting control region (ICR) mice. METHODS The Fe(3)O(4) MNPs were synthesized by chemical coprecipitation, and their morphology and appearance were observed by transmission electron microscopy. ICR mice were divided into a control group and a Fe(3)...

AIMS To determine the effects of anaerobic electron acceptors on 3-methylindole (3-MI) and 4-methylphenol (4-MP) production in swine lagoon enrichments and Clostridium scatologenes ATCC 25775. METHODS AND RESULTS Swine lagoon sediment was incubated anaerobically in tryptone-yeast extract medium with (10 mmol l(-1)) Na(2)SO(4), KNO(3), dimethyl sulfoxide or Fe(III). With Fe(III), 3-MI and 4-MP...

In the title compound, [Fe(H(2)O)(6)][FeBr(3)(CO)(3)](2), both Fe atoms have an octa-hedral coordination and the bromide carbonyl complex has a fac-stereochemistry. The [Fe(H(2)O)(6)](2+) octa-hedron has point symmetry and is slightly compressed along one O-Fe-O axis. The [FeBr(3)(CO)(3)](-) anion has point symmetry 1 and mean bond lengths of Fe-Br = 2.455 (5) Å and Fe-C = 1.809 (2) Å. The cati...