Materials Literature
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Preferential interactions between proteins and metals play an important role in a great number of physiological and biochemical processes. With these premises, the influence of LiCl on the conformation and function of lysozyme has been the main object of our studies. Viscometric, densimetric, solubility and spectropho…
The Horvath–Kawazoe (H–K) method, which is frequently used to obtain the micropore size distributions of microporous materials, has been tested by Monte Carlo Simulation of nitrogen adsorption isotherms. The results show that the H–K method only gives good results when the microporosity is confined to a pore size lowe…
The design and simulated performance characteristics of narrow band-induced transmission infrared filters in the wavelength range of 2000 to 4500 nm are presented. These dielectric-spacer-metal-spacerdielectric (D-S-M-S-D) filter structures are composed of Si as high index dielectric (D) and Al2O3 as low index dielect…
The addition of a small amount of oxygen to a hot filament assisted chemical vapor deposition reactor allows diamond to be deposited at significantly lower filament and substrate temperatures. Scanning electron microscopy and Raman spectroscopy are used to compare films grown with and without oxygen addition as a func…
Numerical simulation of patterns of shear bands in plane-strain compression tests using an elastoplastic Cosserat constitutive equation with consideration of inertia is presented. Random distribution of the material properties acts as a trigger for the localized deformation. Two types of stress-strain curves, namely s…
Fast proton conducting glasses have been obtained in Mg(PO3)2 glasses by implantation of protons at 120 keV to a fluence of 1×1018 cm−2. The dc conductivity and the activation energy of the conduction in the implanted glasses are 5×10−4 s cm−1 at room temperature and 0.18 eV, respectively. No fast proton conduction wa…
The interaction between electrons and organized organic thin films was investigated by measuring the energy distribution of photoelectrons injected from a thin silver film coated with thin organic layers. Electrons with energy above ∽0.8 eV were transmitted ballistically through an organic layer that contains up to fi…
The temperature-spectral dependencies of refractive indices ni and birefringence Δni of first time synthesized RbNH4SO4 crystals in wide temperature (77–300 K) and spectral (250–850 nm) regions were measured. It was shown that ni dispersion is normal and very fine described by Zelmeer's formula. It was found that Δny…
Abstract Mesophases are briefly summarized and defined on a uniform basis, making use of order and mobility parameters. A schematic one‐component phase diagram is then reviewed that includes equilibrium as well as nonequilibrium phases. Assuming only five condensed phases (crystal, melt, glass, mesophase, and mesophas…
Mechanical properties of experimental nitrogen alloyed powder metallurgically produced duplex stainless steels were investigated. The microstructure of the studied powder metallurgically (PM) fabricated and hot isostatically pressed (hipped) duplex stainless steels was homogeneous and isotropic. The proportions of aus…
Caesium titanium alum, CsTi(SO4)2⋅12H2O, is a β alum and exhibits a large trigonal field and a dynamic Jahn–Teller effect. Exact calculations of the linear 2T2⊗e Jahn–Teller coupling show that in the strict S6 site symmetry the ground multiplet consists of a Kramers doublet 2Γ6 with magnetic splitting factors g∥=1.1 a…
Abstract Various new partially fluorinated polymers on the basis of substituted N ‐phenylmaleimides are prepared by radical copolymerisation. Nearly alternating copolymers are produced with vinyl ethers and styrene derivatives. The copolymers show high stability against thermal degradation in comparison to conventiona…
Three different conversion coatings have been evaluated. One of these is an established chromate-phosphate treatment (BONDERITE 705) whilst the others are chromate-free (BONDERITE 777 and EP2472) and not widely used for adhesive bonding. In the present study, the degree of surface modification introduced by these trea…
Abstract Five kinds of poly(aryl ether ketone)s (PAEKs) having para‐substituted linear molecular chains were synthesized via nucleophilic substitution reaction of the corresponding difluoro‐ and dihydroxy‐compounds. The glass transition temperature and melting temperature of the PAEKs measured through differential sca…
Other| February 01, 1997 Twinning in synthetic anorthite: A transmission electron microscopy investigation Huifang Xu; Huifang Xu Arizona State University, Department of Geology, Tempe, AZ, United States Search for other works by this author on: GSW Google Scholar Peter R. Buseck; Peter R. Buseck Search for other work…
A Born–von Karman rigid-ion lattice-dynamical model, using empirical atomic charges and valence force fields derived from the best fit to the vibrational frequencies of a group of silicates and oxides, has been applied to andalusite, kyanite and sillimanite, the three naturally occurring Al 2 OSiO 4 polymorphs. For an…
Hexa- n -alkylcyclotrisiloxanes with side chains ranging from butyl up to decyl were polymerized anionically with cryptated lithium as the counterion. The polymerizations usually yielded polymers with low polydispersity, demonstrating the presence of a single growing species and the successful breaking up of aggregate…
A novel in - situ phosphating coating system is developed by predispersing an optimum amount of phosphatizing reagents into the paint formulation. Five possible in - situ phosphatizing reagents are used in the formulation of a model solvent-borne polyester−melamine enamel paint system. The new formulation is then coat…
Abstract We report about the crystal structure of Cu 12 P 20 Br 10 , a polyphosphide containing the new polyanionic phosphorus polymer [unk][P 20 2− ]. It crystallizes in the triclinic system, space group P [unk] (No. 2) with a = 9.886(2) Å, b = 13.190(2) Å, c = 14.763 (3) Å, α = 70.83(1)°, α = 82.68(1)°, γ = 80.13(1)…
A new Rietveld refinement of previously reported powder neutron diffraction data on ND 4 ReO 4 taken over a wide range of temperatures [Powell, Brown, Harnden & Reid (1993). Acta Cryst . B 49 , 463–468] is reported. Rigid-body constraints are applied to the cation geometry and occupation of a second cation orienta…