Solid-State Schikorr Reaction from Ferrous Chloride to Magnetite with Hydrogen Evolution as the Kinetic Bottleneck.

The selective formation of meta-stable FeO from ferrous sources by suppressing its oxidative conversion to the most stable hematite (α-FeO) is challenging under oxidative conditions for solid-state synthesis. In this work, we investigated the conversion of iron(II) chloride (FeCl) to magnetite (FeO) under inert atmosphere in the presence of steam, and the obtained oxides were analyzed by atomic-resolution TEM, Fe Mössbauer spectroscopy, and the Verwey transition temperature (). The reaction proceeded in two steps, with HO as the oxide source in the initial step and as an oxidant in the second step.

The Steric Effect in Preparations of Vanadium(II)/(III) Dinitrogen Complexes of Triamidoamine Ligands Bearing Bulky Substituents.

The reactions of newly designed lithiated triamidoamines Li ( = iPr, Pen, and Cy) with VCl(THF) under N yielded dinitrogen-divanadium complexes with a μ-N between vanadium atoms [{V()}(μ-N)] ( = iPr () and Pen ()) for the former two, while not dinitrogen-divanadium complexes but a mononuclear vanadium complex with a vacant site, [V()] ( = Cy ()), were obtained for the third ligand. The V-N and N-N distances were 1.7655(18) and 1.

Dinitrogen Fixation by Vanadium Complexes with a Triamidoamine Ligand.

Dinitrogen-divanadium complexes with triamidoamine ligands, 1-3, were synthesized and characterized by resonance Raman, UV-vis, and NMR spectroscopy and elemental and X-ray structure analyses. X-ray structure analyses reveal that all three of the complexes have a dimeric structure with a μ-N ligand (N-N bond length 1.200-1.

Mesoporous silica-catalysed continuous chemical fixation of CO(2) with N,N'-dimethylethylenediamine in supercritical CO(2): the efficient synthesis of 1,3-dimethyl-2-imidazolidinone.

MCM-41- and HMS-type mesoporous silicas were found to be efficient catalysts for the continuous chemical fixation of CO(2) into 1,3-dimethyl-2-imidazolidinone with N,N'-dimethylethylenediamine in supercritical CO(2).

Circulating insulin-like growth factor-1 and insulin-like growth factor binding protein-3 are associated with early carotid atherosclerosis.

Objective: Growth hormone (GH)-insulin-like growth factor (IGF)-1 axis regulates growth and survival of vascular cells and cardiomyocytes. The role of GH-IGF-1 axis in cardiovascular disease is controversial.

Methods And Results: We assessed the association of circulating levels of IGF-1 and IGF binding protein-3 (IGFBP-3) with early carotid atherosclerosis and atherosclerotic risk factors in 330 Japanese men (age 51.

Effects of dietary treatment alone or diet with voglibose or glyburide on abdominal adipose tissue and metabolic abnormalities in patients with newly diagnosed type 2 diabetes.

Unlabelled: OBJECTIVE; To examine the effects of diet and diet with voglibose or glyburide on abdominal adiposity and metabolic abnormalities in patients with type 2 diabetes.

Research Design And Methods: A total of 36 Japanese patients with newly diagnosed type 2 diabetes (50.8 +/- 8.