Materials Literature
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Helium atom scattering (HAS) studies of the H-covered Mo(110) and W(110) surfaces reveal a twofold anomaly in the respective dispersion curves. In order to explain this unusual behavior we performed density functional theory calculations of the atomic and electronic structure, the vibrational properties, and the spect…
An extracellular protease ofBacillus subtilis K2, when compared with the pancreatic bate ‘Oropon’ used at comparable protease activity, produced a finer grain and greater elasticity of goat pelt. Quality of the processed, finished leather after microbial bating showed <41% and <14% increases in tensile and tear streng…
Abstract Reversible dioxygenation reaction of a molybdenum(IV) porphyrin, MoIVO(tmp), in the solid state with dioxygen, was confirmed directly by in-situ UV-vis spectral measurements.
The phase behavior of liquid-crystalline salts having a cholesteryl group was investigated by differential scanning calorimetry and polarized-light microscopy. Cholesteryl hydrogen succinate (CHS) and cholesteryl hydrogen phthalate (CHP) were used as a mesogenic core, and a series of normal aliphatic amines with 12 ∼…
We have investigated tailoring damage effects of explosive devices by addition of unconventional materials, specifically combustible metals. Initial small-scale as well as full-scale testing has been performed. The explosives functioned to disperse and ignite these materials. Incendiary, enhanced-blast, and fragment-d…
Although the (n + 1)p orbital is unoccupied in transition-metal ground-state configurations which are all ndx(n + 1)sy, these (n + 1)p functions play a crucial role in the structure of transition metal complexes. As we show here, the usual solution, adding one or more diffuse functions, can be insufficient to create a…
Different amounts (0.5–3 wt%) of fumaric acid (FA) were added to a solvent-based polyurethane (PU) adhesive. Addition of FA produced a decrease in viscosity and changed the rheological and viscoelastic properties of the liquid PU adhesive, which was more marked upon increasing the time after the adhesive was prepared…
A subwavelength grating structure made in an isotropic medium induces form birefringence effects, and the artificially produced optical axis is parallel to the grating vector. The phase shift between the two orthogonal electric-field components exiting this grating varies linearly with the thickness of the grating. Wh…
Diamond films (DF) have been deposited on AlN ceramic substrates by hot filament chemical vapour deposition method. The diamond nucleation on AlN ceramics has been investigated. A nucleation density more than 10 8 cm -2 was obtained on this kind of insulating polycrystalline substrate under common deposition condition…
Single crystals of Sr 2 (VO) 2 Si 4 O 12 could be obtained by high-pressure high-temperature reaction of a SrSiO 3 /SiO 2 /V 2 O 5 mixture in a modified Belt-type apparatus. The green crystals are orthorhombic, space group Cmcm, with a = 5.3139(3), b = 14.6281(7), c = 7.0329(4) Å and Z = 2. The structure comprises vie…
A compact furnace has been developed, for low-background high-temperature X-ray studies, that can be used routinely with an on-line imaging-plate scanner (MAR Research). The furnace operates under an inert-gas atmosphere between ambient temperature and 1500 K with a relative thermal stability of ±0.5 K in long-time ex…
Abstract According to high pressure spectroscopies, in particular, the nearly linear red‐shift of the R‐line at pressures above ≈ 7 GPa for Gd 3 Ga 5 O 12 : Cr 3+ and Gd 3 Sc 2 Ga 3 O 12 : Cr 3+ crystals, the local linear compressibilities of (CrO 6 ) 9− groups in both systems at P ≈ 7 GPa have been determined by usin…
Dc electrical conductivities [sgrave]dc of 90V2O5−10Bi2O3 (VB) glasses doped with different SrTiO3 concentrations (0–40 wt%) are reported between 80 and 450 K. At higher temperatures, the Mott model of phonon-assisted small-polaron hopping between nearest neighbours is consistent with the conductivity data while, at l…
Technical Briefs Nucleate Pool Boiling on Micro Graphite–Copper Composite Surfaces Gai-Wai Yang, Gai-Wai Yang Department of Mechanical Engineering and Applied Mechanics, University of Michigan, Ann Arbor, MI 48109 Search for other works by this author on: This Site PubMed Google Scholar Hsing-Sheng Liang, Hsing-Sheng…
BACKGROUND/AIMS: Monitoring of ultraviolet (UV) exposure in humans is important, since UV has been implicated in the pathogenesis of skin cancer, skin ageing and immunosuppression. Biological and physical dosimeters are being developed to measure occupational and environmental UV radiation exposure. We studied the UV-…
The segmented poly(urethane urea) copolymers were synthesized by one- and two-step polymerization procedures. The copolymers were based on 4,4′-diphenylmethane diisocyanate, 3,5-diethyltoluene diamine, and ethylene oxide-capped poly(propylene oxide) diol. The mean sequence lengths of polyurethane soft block and polyur…
The structure of Sb 2 WO 6 [ M r = 523.4, triclinic, F {\bar 1}, a = 11.132 (1), b = 9.896 (4), c = 18.482 (7) Å, α = 90.20 (4), β 96.87 (8), γ = 90.21 (5)°, D x = 6.88 g cm −3 , Z = 16, Mo K α, λ = 0.7107 Å, μ = 338.5 cm −1 , F (000) = 3536] has been refined as an enlarged 2 a × 2 b × 2 c F -centred superstructure of…
In cholesteric liquid crystals with positive dielectric anisotropy an electric-field induced texture with unusual properties was observed. This texture appears after the reduction of the electric field during the transition from the homeotropic nematic state into the planar cholesteric one. The angular and the electri…
Abstract The band structure and magnetic properties of the ordered Co 2−x Ni x TiSn Heusler‐type alloys for x = 0, 1, and 2, are studied by using the spin‐polarised TB LMTO method. We found that the Ni 2 TiSn system is paramagnetic. The self‐consistent band calculations for the systems with vacancy (□) have shown that…
The formation of dislocation rings at crack tips is considered when the glide plane is tilted against the crack plane and does not contain the crack front. The emanating ring is described in the Peierls model by a distribution of infinitesimal dislocations and the influence of the interplanar potential in the glide pl…