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[en] Chambersite (Mn3B7O13Cl)–Ti composites were fabricated using spark plasma sintering. The microstructure and phase composition of the composites were investigated along with the effects of chambersite on the mechanical properties and friction properties of Ti. The results show that chambersite reacts with Ti during sintering to form TiB, TixOy, and MnCl2. The mechanical properties of the composites were optimal for the composite with 5 vol% chambersite. Chambersite helps to improve the friction properties of Ti: with increasing amount of chambersite added, the wear rate of the composites decreases. (paper)
[en] The MnCl2-UC14 system is a part of a long series of our phase and thermodynamic studies on the binary uranium tetrachloride systems (MCln-UC14, where M is any metal). It was formerly noted  that there is a relation between the phase equilibrium type and the ionic potentials ratio (ΦMn+/(ΦU4+ of cations in those systems. The ionic potential Zi of the cation ''i'' is defined as the ratio of the cation valence (Zi) and of the cation radius (ri): Φ= Zi/ri . The relation has been illustrated in Table 1
[en] The longitudinal (T1) relaxation mechanisms involving magnetization transfer (MT) were analytically studied using spoiled gradient recalled acquisition in steady state with MT pulse (MTSPGR) sequences on gelatin and MnCl2 phantoms. The (Ge-P) phantoms contained gelatin of various concentrations. The latter (>Mn-P) phantoms had various MnCl2 concentrations in 20% gelatin gel. Magnetization transfer ratios (MTRs) were calculated with and without the MT pulse applied. The change of T1 value was analysed on the assumption that it was related to the MT. An apparent saturation transfer ratio (1/T1*) was separated into the conventional longitudinal ratio (1/T1) and the associated cross relaxation rate (1/TIS). The values of 1/T1 and 1/T1* decreased with increasing gelatin and MnCl2 concentrations of the phantoms. The MTRs of the Ge-P and Mn-P showed different characteristics, which were presumably attributed to their dominant relaxation mechanisms. In the Ge-P, the relaxation mechanism was possibly dominated by cross relaxation. On the other hand, in the Mn-P, the relaxation mechanism was possibly dominated by apparent saturation transfer. Still more, it was accounted that the change of the MTR reflected the tissue malignancy. Results of this study were explicative to the MTR changes in clinical cases, and the analysis of T1 mechanism in this study should prove to be suggestive of a new approach to tissue characterization of human subjects. (author)
[en] We explore the potential of a microfluidic continuous flow particle separation system based on the repulsion of diamagnetic materials from a high magnetic field. Diamagnetic polystyrene particles in paramagnetic manganese (II) chloride solution were pumped into a microfluidic chamber and their deflection behaviour in a high magnetic field applied by a superconducting magnet was investigated. Two particle sizes (5 and 10 μm) were examined in two concentrations of MnCl2 (6 and 10%). The larger particles were repelled to a greater extent than the smaller ones, and the effect was greatly enhanced when the particles were suspended in a higher concentration of MnCl2. These findings indicate that the system could be viable for the separation of materials of differing size and/or diamagnetic susceptibility, and as such could be suitable for the separation and sorting of small biological species for subsequent studies.
[en] Powder neutron diffraction measurements were performed on NaMnCl3 at temperatures above and below its Neel temperature (6.5 +- 0.5) K. Symmetry analysis was used to find magnetic models consistent with the experiment. The spin-flip transition was found in the magnetic field approx. 15 kOe at T = 4.2 K and its temperature dependence was investigated. (orig.)