Magnetic Properties of Al-Si-MTM ( Magnetic Transition Metal) Melt Quenched Amorphous Ribbons

Al-Si-MTM( Magnetic Transition Metal) amorphous ribbons were prepared from the melts in order to investigate the magnetic properties. These samples have no magnetic moment, except for Al-Si-Mn amorphous alloys, showing no Curie-Weiss type temperature dependence of the magnetic susceptibility. Al-Si-Mn amorphous alloys exhibit a spin-glass like behavior such as a magnetic cooling effect. The very high electrical resistivity of Al-Si-Mn amorphous alloys is correlated to the magnetic and resonant scatterings. No microcrystalline precipitate was confirmed by electron microscope observation

Structural analysis and taste evaluation of γ-glutamyl peptides comprising sulfur-containing amino acids

<p>The structures, flavor-modifying effects, and CaSR activities of γ-glutamyl peptides comprising sulfur-containing amino acids were investigated. The chemical structures, including the linkage mode of the <i>N</i>-terminal glutamic acid, of γ-L-glutamyl-<i>S</i>-(2-propenyl)-L-cysteine (γ-L-glutamyl-<i>S</i>-allyl-L-cysteine) and its sulfoxide isolated from garlic were established by comparing their NMR spectra with those of authentic peptides prepared using chemical methods. Mass spectrometric analysis also enabled determination of the linkage modes in the glutamyl dipeptides by their characteristic fragmentation. In sensory evaluation, these peptides exhibited flavor-modifying effects (continuity) in umami solutions less pronounced but similar to that of glutathione. Furthermore, the peptides exhibited intrinsic flavor due to the sulfur-containing structure, which may be partially responsible for their flavor-modifying effects. In CaSR assays, γ-L-glutamyl-<i>S</i>-methyl-L-cysteinylglycine was most active, which indicates that the presence of a medium-sized aliphatic substituent at the second amino acid residue in γ-glutamyl peptides enhances CaSR activity.</p> <p>Structural analyses and taste evaluations of g-L-glutamyl-<i>S</i>-(2-propenyl)-L-cysteine and its sulfoxide isolated from garlic and related peptides were performed using authentic chemically synthesized samples.</p

Magnetic Properties of Cr-C and Cr-Zr Amorphous Alloys

Cr-C and Cr-Zr amorphous alloys were prepared by a high-rate dc sputtering method. From the measurements of the magnetization as a function of magnetic field and the temperature dependence of susceptibility, it is concluded that the present amorphous alloys have no localized magnetic moment, and then no spin-glass behavior. The magnitude of susceptibility of Cr-C amorphous alloys is larger than that of Cr-Zr ones at the same composition. The temperature dependence of susceptibility of Cr-20 %C amorphous alloy shows a slight increase at low temperatures. This increase would not be attributed to the magnetic impurities but to the enhancement of the repulsive Coulomb force due to randomness of the amorphous structure