Materials Literature
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The anisotropy of rapid fluctuations of the peptide planes in ubiquitin is explored by combined 15 N and 13 C‘ nuclear spin relaxation measurements and molecular dynamics (MD) computer simulation. T 1, T 2, and NOE data were collected at B 0 -field strenghts corresponding to 400 and 600 MHz proton resonance. A 1.5-ns…
The phase diagram of the ferromagnetic Kondo model for manganites was recently investigated using computational techniques by Yunoki et al. [Phys. Rev. Lett. 80, 845 (1998)]. In dimensions 1, 2, and $\ensuremath{\infty}$ and using classical localized spins, this study suggested a rich low-temperature phase diagram wit…
6,7-Bis(alkyloxy)-2,3-dihydrophthalazine-1,4-diones self-assemble into lactim−lactam trimeric disks in solution as demonstrated by SEC and NMR. With suitable substituents, as in Phthal 8, Phthal 12, and Phthal 16, these disks self-organize into a thermotropic, columnar, discotic phase. The disubstituted phthalhydrazid…
Recent studies have produced 0.1 × 0.1 μm ferroelectric cells in both bismuth titanate and strontium bismuth tantalate, thus taking thin-film ferroelectric memories into the regime of nanoscale (100 nm or less) devices. A review is presented of deposition, switching, and leakage current in these devices, which are sma…
The mineralogy and microstructure, which affect the slaty cleavage, are linked with the strong preferred orientation of phyllosilicates and this enables the rock to be split into large, thin, flat sheets. Roofing slate samples with different commercial fissilities have been analyzed by radioluminescence (RL), thermolu…
This paper follows another one published in the preceding number of this same journal, that reviewed some scientific papers on the influence of the factors of the cutting equipments (machinery, cutting characteristics, disks, etc) on the efficiency of the cutting process of ornamental rocks with diamond disks. In this…
The development of microstructural damage in silicon carbide fibre (Nicalon™) reinforced glass matrix composite samples subjected to thermal shock was investigated by using a nondestructive forced resonance technique and fibre push out indentation tests. Thermal shock testing involved quenching samples in a water bath…