Synthesis and Magnetic Properties of (C5H5)3Ce-Center-HMPA.

The 1:1 adduct (C5H5)3 de.O=P(NMe2)3 of cerium(III)-triscyclopentadienide with hexamethylphosphoric triamide (HMPA) was synthesized, isolated, purified and characterized by elemental analysis, IR- and 1H-NMR spectroscopy. The 1H-NMR spectrum obtained in solution in CDCl-3 at room temperature exhibits a single signal for the Cp-proton at 5.6 ppm and a signal for the CH3-proton of the base HMPA at 0.49 ppm. The paramagnetic shift due to the Ce(III) ion could be evaluated by comparison to the corresponding signals of the homologous diamagnetic compound Cp3La.HMPA. The temperature-dependent paramagnetic susceptibility of the compound was measured within the temperature range from 4.2 up to 300 K. From the 1/Chi-mol vs. T-plot the empirical constant C=(mu- eff) is consistent with a Ce(III) ion. The ground state of the Ce ion is only partially populated. The magnetic moment at room temperature is 2.25 mu-b=B, an indication of covalency, as it has been observed for several Ce(III)-organometallics.JRC.E-Institute for Transuranium Elements (Karlsruhe

Structures of the Anhydrous Yb(III) and the Hydrated Ce(III), Sm(III) and Tb(III) Methanesulfonates.

Abstract not availableJRC.E-Institute for Transuranium Elements (Karlsruhe

Structure and Properties of Hydrated La(III), Nd(III) and Er(III) Methanesulonates.

Abstract not availableJRC.E-Institute for Transuranium Elements (Karlsruhe

Structure and Properties of Hydrated La(III), Nd(III) and Er(III) Methanosulfonates.

Abstract not availableJRC.E-Institute for Transuranium Elements (Karlsruhe

Development Of New Systems Of Nano-disperse Pt-(2%pt-ce0.9w 0.1o2)/c Electrocatalysts Tolerant To Carbon Monoxide (co) For Pemfc Anodes

The nanophase material (powder) of Ce0.9W0.1O 2 was synthesized via coprecipitation of oxalates of cerium (IV) and tungsten cations. Pt-Ce0.9W0.1O2 (2 wt% Pt) was prepared by an alcohol-reduction process using H2PtCl 6.6H2O as source of Pt, Ce0.9W 0.1O2 as support and ethylene glycol as solvent and reducing agent. Pt-Ce0.9W0.1O2 was physically mixed with commercial Pt/C E-TEK (20 w% Pt) to produce the Pt-(2%Pt-Ce 0.9W0.1O2)/C electrocatalyst. The prepared electrocatalysts were characterized by energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD) and CO stripping. The performances of Pt/C E-TEK and Pt-(2%Pt-Ce0.9W0.1O2)/C electrocatalysts were tested in single fuel cell fed with a mixture H2/CO (100 ppm of CO). The results showed that the mixture of 2%Pt-Ce0.9W 0.1O2 and Pt/C E-TEK increases the CO tolerance in a single fuel cell operating at 85°C compared with Pt/C E-TEK. ©The Electrochemical Society.431185189Du Melle, F., The global and urban environment: The need for clean power systems (1998) Journal of Power Sources, 71 (1-2), pp. 7-11Oliveira Neto, A., Farias, A.L., Dias, R.R., Brandalise, M., Linardi, M., Spinacé, E.V., Enhanced electro-oxidation of ethanol using PtSn/CeO2-C electrocatalyst prepared by an alcohol-reduction process (2008) Electrochemistry Communications, 10 (9), pp. 1315-1317Pamqvist, A.E.C., Wirde, M., Gelius, U., Muhammed, M., Surfaces of Doped Nanophase Cerium Oxide Catalysts (1999) NanoStructured Materials, 11 (8), pp. 995-1007Rothenberg, G., De Graaf, E.A., Bliek, A., Solvent-Free Synthesis of Rechargeable Solid Oxygen Reservoirs for Clean Hydrogen Oxidation (2003) Angew. Chem. Int. Ed., (42), pp. 3366-3368. , BartGu, D.M., Chu, Y.Y., Wang, Z.B., Jiang, Z.Z., Yin, G.P., Liu, Y., Methanol oxidation on Pt/CeO2-C electrocatalyst prepared by microwave-assisted ethylene glycol process (2010) Applied Catalysis B: Environmental, 102 (1-2), pp. 9-18Hou, Z., Yi, B., Lin, Z., Zhang, H., CO tolerance of PtRu-HxMeO3/C (Me = W, Mo) made by composite support method (2003) Journal of Power Sources, 123 (2), pp. 116-125Santiago, E.I., Batista, M.S., Assaf, M.E., Ticianelli, E.A., Mechanism of CO tolerance on Molybdenum-Based Electrocatalysts for PEMFC (2004) Journal of the Electrochemical Society, 151 (7), pp. A944-A94

Development and Initial Validation of the Macrophage Activation Syndrome/Primary Hemophagocytic Lymphohistiocytosis Score, a Diagnostic Tool that Differentiates Primary Hemophagocytic Lymphohistiocytosis from Macrophage Activation Syndrome

To develop and validate a diagnostic score that assists in discriminating primary hemophagocytic lymphohistiocytosis (pHLH) from macrophage activation syndrome (MAS) related to systemic juvenile idiopathic arthritis. OBJECTIVE: To develop and validate a diagnostic score that assists in discriminating primary hemophagocytic lymphohistiocytosis (pHLH) from macrophage activation syndrome (MAS) related to systemic juvenile idiopathic arthritis. STUDY DESIGN: The clinical, laboratory, and histopathologic features of 362 patients with MAS and 258 patients with pHLH were collected in a multinational collaborative study. Eighty percent of the population was assessed to develop the score and the remaining 20% constituted the validation sample. Variables that entered the best fitted model of logistic regression were assigned a score, based on their statistical weight. The MAS/HLH (MH) score was made up with the individual scores of selected variables. The cutoff in the MH score that discriminated pHLH from MAS best was calculated by means of receiver operating characteristic curve analysis. Score performance was examined in both developmental and validation samples. RESULTS: Six variables composed the MH score: age at onset, neutrophil count, fibrinogen, splenomegaly, platelet count, and hemoglobin. The MH score ranged from 0 to 123, and its median value was 97 (1st-3rd quartile 75-123) and 12 (1st-3rd quartile 11-34) in pHLH and MAS, respectively. The probability of a diagnosis of pHLH ranged from\u2009<1% for a score of\u2009<11 to\u2009>99% for a score of \u2009 65123. A cutoff value of\u2009 6560 revealed the best performance in discriminating pHLH from MAS. CONCLUSION: The MH score is a powerful tool that may aid practitioners to identify patients who are more likely to have pHLH and, thus, could be prioritized for functional and genetic testing