Materials Literature
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Bolaamphiphile with a glycylglycine unit at each end, N,N′-bis(carboxymethylcarbamoylmethyl)decane-1, 10-dicarboxamide, has been synthesized. The crystal structure was determined by single-crystal X-ray analysis. The space group is P21/a with unit cell parameters: a = 8.678(3), b = 4.873(4), c = 27.161(3) Å, β = 92.68…
Abstract Polybutadiene rubber with 10% vinyl unsaturation has been crosslinked without the addition of any vulcanization chemicals. The crosslinks have been created through treatment at high temperature (240–250°C) and elevated pressure (<293 MPa) in a plunger type mold. The treatment time needed to achieve a cross…
Abstract Every year great quantities of chrome tanned leather wastes produced by the footwear and clothing industries are buried or burned. These practices produce several contaminants that are released into the environment. An alternative to disposing of these wastes is to reuse them. In this work, a method to use th…
The problem of diffusional interactions in a finite-sized cluster of spherical particles is studied. Simulations of diffusional interactions with size distribution and volume fraction ${V}_{v},$ as input parameters, referred to as snapshot (static) simulations, are compared with dynamic (time-dependent) simulation res…
Real surfaces are not flat on an atomic scale. Studying the effects of roughness on microstructural evolution is of relevance because films are sputtered onto nonideal surfaces in many applications. To this end, amorphous rough substrates of two different morphologies, either elongated mounds or facets, were fabricate…
Engineered manufacturing of high quality garments has long been a target of textile technology. There are three main factors for manufacturing high quality garments. They are: the selection of good fabrics for the garments; the process control of garment manufacturing; and the performance and correct adjustment of man…
The effects of W on the precipitation behaviour of 25 Cr-6Ni base super duplex stainless steels with various Mo and W contents have been examined following heat treatments in the temperature range 700–1050°C. Upon aging, the major intermetallic phase of the duplex stainless steel containing Mo was σ phase. In duplex s…
Space-charge distributions in plate and coaxial cable samples of various polyethylene (PE) materials such as high density polyethylene, linear low density polyethylene, low density polyethylene, and cross-linking polyethylene under dc voltage are systematically investigated by the pulsed electro-acoustic method. The c…
A variety of photostructural changes observed in tetrahedral and chalcogenide amorphous semiconductors are reviewed from physical and chemical points of view. In particular, observations of the photodarkening and related phenomena in chalcogenide glasses are summarized, and structural models which have been proposed s…
Corrosion of steel equipment from oil-containing water has been a significant problem in the petroleum industry for many years. Despite this known problem, essentially no methodical study has been performed to elucidate the mechanisms. Moreover, no attempts have been made to predict corrosion in predominately oil-base…
Abstract The study of structure and properties of semi‐crystalline polymer inter‐phases is important to explain and extend polymer applications. In this region, polymer chains exist in three distinct populations: tie chains that bridge the two crystals, chain folds and chain ends. The distribution of these populations…
Chemical imidization of polyamic acid based on 1,5-diaminonaphthalene and a dianhydride was studied by UV−visible and FT-IR ATR techniques under various reaction conditions, such as polyamic acid concentration, solvent condition (dry vs humidity-exposed NMP), catalysts of tertiary amines with different degrees of ster…
Raman spectroscopy was used to study strain-induced molecular stress in cold-drawn polyethylenes, which were being used as a model system for fibrils present in the crazes formed during environmental stress crack resistance (ESCR) tests. The molecular stress was measured at 240 K in order to minimize relaxation phenom…
The possibility that the structure of the novel semiconducting perovskite-related material strontium niobium oxide, Sr 5 Nb 5 O 17 , refined by Schmalle et al. [ Acta Cryst. (1995), C 51 , 1243–1246] in space group Pnn 2, might instead belong to space group Pnnm has been investigated following an analysis of the atomi…
The Unified Interaction Model (UNIM), developed to describe thermoluminescence dose response, is based on both radiation absorption stage and recombination stage mechanisms. The UNIM incorporates both the Track Interaction Model (TIM) for heavy charged particles (localised and highly nonuniform ionisation density dist…
This paper reports the near-infrared (NIR) surface-enhanced Raman scattering (SERS) detection of immune reaction on gold colloid particles without bound/free (B/F) antigen separation. A SERS spectrum was measured for anti-mouse IgG at 2.2×10-8 M adsorbed on gold colloid particles. The spectrum showed a number of Raman…
The various irreversible and reversible photoinduced phenomena in chalcogenide glasses, among them isotropic and anisotropic effects, were considered until now to have different origins. Upon reexamination, we find that the elemental photostructural steps are the same for all these phenomena. These are nonradiative re…
Abstract Novel guest-host liquid crystal systems containing 3,3-disubstituted azobenzenes as guests were prepared on the basis of molecular design by molecular calculations to achieve the improvement of compatibility of the chromophore with nematic phases. No phase change of nematic liquid crystals was induced by the…
71 Ga and 69 Ga single-crystal NMR spectra of a β-Ga 2 O 3 twin have been analyzed in terms of the 71 Ga/ 69 Ga quadrupole coupling and chemical shielding anisotropy (CSA) interactions. Analyses of the magnitudes and orientations of the interaction tensors for the two distinct crystallographic gallium sites in the two…
Type VIII collagen is a short chain collagen. Two chains have been described, alpha1(VIII) and alpha2(VIII), but the chain composition of type VIII collagen is far from resolved. To address this question, we have expressed full-length alpha1(VIII) and alpha2(VIII) chains in an in vitro translation system supplemented…