[Brain metabolism alterations in patients with anorexia nervosa observed in 1H-MRS]

Contains fulltext : 48323.pdf (publisher's version ) (Open Access)The causes of metabolic brain changes in patients with anorexia nervosa are still not fully explained. The purpose of this study was to use the 1H-MRS method in investigating metabolic changes in the brain of patients with anorexia nervosa. We studied 10 patients for visible alternations in brain metabolism and compared the results to healthy controls. 1H-MRS was acquired by the method of single voxels in white and grey matter. Proton MRS was performed after image guided localization using stimulated echo acquisition mode (STEAM) sequence with a short echo time of 20 ms. For data evaluation we used standard Siemens software and the additional PC. Choosing of the MRS sequences was related with particular interest in metabolites of short time echo: myoinositol and lipids. Besides this we evaluated peaks of: N-acetylaspartate (NAN), creatine (Cr) and choline (Cho). The results show significant differences in the levels of metabolites connected with fatty metabolism. In white matter we observed the reduction of lip-peak. The data was evaluated approximately and presented as lip:Cr. We did not observe any differences in other metabolites. As far as we know similar results had been reported and our study confirmed significant disorders in metabolism of these chemicals in patients with anorexia nervosa

Design of One-Dimensional Coordination Networks from a Macrocyclic {3d-4f} Single-Molecule Magnet Precursor Linked by [W(CN)8]3− Anions

The outcome of 1:1 reactions of the tetranuclear 3d-4f Single Molecule Magnet (SMM) [Cu3Tb(LPr)(NO3)2(H2O)]NO3 (1) with (TBA)3[W(CN)8] (TBA = tri-nbutyl ammonium cation, [(n-Bu)3N−H]+) in dimethylformamide (DMF) is dependent on the crystallization method employed: liquid−liquid diffusion of the reagents together gives {[Cu3Tb(LPr)W(CN)8(DMF)4]*(DMF)}n (2) whereas diethyl ether vapor diffusion into the reaction solution gives {[Cu3Tb(LPr)W(CN)8(DMF)3(H2O)3]*(DMF)1.5*(H2O)0.5}n (3). Both compounds are obtained as black single crystals and feature one-dimensional (1D) coordination networks (chains) of [1]3+ macrocycles linked by [W(CN)8]3− anions. The two assemblies differ from a structural point of view...