The reactions of hydrogen with the 14-electron high-spin iron( 1 1 ) dialkyls of stoichiometry [ FeRJdippe)] [dippe = 1,2-bis(diisopropylphosphino)ethane] have been studied. The p-methylbenzyl complex in diethyl ether yielded the zerovalent p-xylene complex [Fe(q6-C,H4Me,-1 ,4) (dippe)], where the arene ligand has been formed by addition of a hydrogen atom to the a-carbon of the p-methylbenzyl ...

X-ray absorption near edge structure (XANES) measurements at the C, N, and Fe K absorption edges were performed for iron(III)-tetraphenylporphyrin (FeTPP), iron(III)-tetrakis(p-carboxyphenyl)porphyrin (FeTCPP), and iron(III)-tetrakis(p-sulfonatophenyl)porphyrin (FeTSPP). The spectral shapes differ in the Fe K XANES, but not in C and N K XANES among FeTPP, FeTCPP, and FeTSPP. Crosschecks of XANE...

The effects of ascorbic acid (AA), phytate and tannic acid (TA) on Fe bioavailability from Fe supplied as reconstituted ferritin were compared with FeSO4 using an in vitro digestion-Caco-2 cell model. Horse spleen apoferritin was chemically reconstituted into an animal-type ferritin (HSF) and a plant-type ferritin (P-HSF) according to the typical ratios of Fe:P found in these molecules. In the ...

M. Mahgoub, R. Krücken, Th. Faestermann, A. Bergmaier, D. Bucurescu, R. Hertenberger, Th. Kröll, H.-F. Wirth, and A. F. Lisetskiy 1 Physik Department, Technische Universität München, D-85748 Garching, Germany 2 Institut für Angewandte Physik und Messtechnik, Universität der Bundeswehr München, D-85577 Neubiberg, Germany 3 Horia Hulubei National Institute of Physics and Nuclear Engineering (IFIN...

This work utilizes Fe(2+)-catalyzed cleavages and molecular modeling to obtain insight into conformations of cytoplasmic domains and ATP-Mg(2+) binding sites of Na(+),K(+)-ATPase. In E(1) conformations the ATP-Fe(2+) complex mediates specific cleavages at 712VNDS (P domain) and near 440VAGDA (N domain). In E(2)(K), ATP-Fe(2+) mediates cleavages near 212TGES (A domain), near 440VAGDA, and betwee...