Materials Literature
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Abstract The effect of Ethylene Methyl Acrylate (EMA) copolymer as a reactive polymeric compatibilizer in a blend of 50:50 Thermoplastic Polyurethane (TPU)‐Polydimethylsiloxane (PDMS) rubber has been studied. The compatibility was proved by mechanical property measurements and phase morphology studies. EMA reacted wit…
Modeling of kinoforms in optical design software packages can be done in terms of the phase function ϕ(r). The required surface-relief profile t(r) is determined approximately from the relation t(r) = [λ/2π(μ − 1)][ϕ(r)]2π, where λ is the operating wavelength, μ is the refractive index of the optical material of the s…
The hydrogen sites in the disordered metal hydrides, \ensuremath{\beta}-${\mathrm{Ti}}_{1\mathrm{\ensuremath{-}}\mathit{y}}$${\mathrm{V}}_{\mathit{y}}$${\mathrm{H}}_{\mathit{x}}$ (x\ensuremath{\sim}1 and 0.2\ensuremath{\le}y\ensuremath{\le}0.9) were studied using the incoherent inelastic neutron scattering (IINS) tech…
The solid oxide fuel cell shows great potential as an efficient energy conversion system for use in central power stations. These cells can reform most hydrocarbon fuels with air to produce electricity and provide a heat source at 1000°C while maintaining an efficiency of 60–75 percent. This paper describes a steady-s…
Abstract Small‐ and wide‐angle x‐ray scattering is used for structural characterization of amylose solutions and gets. Recently published coordinates determined by x‐ray fiber structure analysis and electron diffraction [A. Imberty and S. Perez: (1988) Biopolymers , Vol. 27. pp. 1205–1212: H. C. Wu and A. Sarko (1978)…
We have investigated multilamellar lipid vesicles (MLV) of defined size (400 nm) containing increasing amounts of cholesterol (CH ) as carriers of azobenzene disperse dyes to wool fibers. The liposomes are made from egg phosphatidylcholine (PC) and contain CI Disperse Orange 1 at different PC : CH relative concentrati…
Magnetic microsphere-methoxtrexate (MM-MTX) conjugates prepared by several different methods were analyzed for their suitability for in vivo use. MM-MTX were prepared by the following methods: (A) reaction of MTX with poly(ethylene glycol) 1500 (PEG) to form a poly(ethylene glycol)-methotrexate conjugate (PEGMTX) whic…
Abstract The mixing of electrically conducting polymers in the undoped state with flexible polymers has been limited due to the stiffness of the delocalized coplanar backbone. The substitution with alkyl side chains has resulted in the distortion of the aromatic rings in the backbone with an increase of the flexibilit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation of 4-Alkoxy-.gamma.-valerolactones from Levulinic Acid and Alcohols during Storage at Room TemperatureChi-Kuen Shu and Brian M. LawrenceCite this: J. Agric. Food Chem. 1995, 43, 3, 782–784Publication Date (Print):March 1, 1995Publication History Published online1 M…
Abstract Dielectric spectroscopy is employed to analyze the molecular dynamics and the charge transport in mixtures of zwitterionic polymers of the type poly{3 [N(ω‐methacryloyloxyalkyl)] N , [ N ‐dimethylammonio propanesulfonate] with sodium iodide in the frequency range of 10 2 Hz–10 7 Hz and in the temperature rang…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCyathocaline, an Azafluorenone Alkaloid from Cyathocalyx zeylanicaE. M. Kithsiri Wijeratne, Leslie B. De Silva, Tohru Kikuchi, Yasuhiro Tezuka, A. A. Leslie Gunatilaka, and David G. I. KingstonCite this: J. Nat. Prod. 1995, 58, 3, 459–462Publication Date (Print):March 1, 199…
Abstract The processing of poly(imide) films from poly(amic acid) solutions involves the simultaneous loss of solvent and chemical conversion, and may involve structural reorganization such as orientation or crystallization. Here, we describe weight loss, solvent sorption. Fourier transform infrared (FTIR), and wide‐a…
A stress‐induced aging phenomenon is observed to occur at room temperature in deformation bands introduced into a 8.5 mol% ceria‐stabilized tetragonal zirconia/alumina (CeTZP/A1 2 O 3 ) composite by flexural loading. The aging occurs with time after unloading and in laboratory air. Over a period of 100 days, the conce…
Anaerobic sn-glycerol-3-phosphate dehydrogenase of Escherichia coli is encoded by an operon of three genes, glpACB. The promoter distal gene, glpB, encodes a 44-kilodalton polypeptide that is not part of the purified soluble dehydrogenase. By recombinant plasmid complementation, in a strain harboring a chromosomal del…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInvestigations of the Chemical Interactions between Molecular Oxygen and Pristine (Undoped) PolypyrroleJunting Lei and Charles R. MartinCite this: Chem. Mater. 1995, 7, 3, 578–584Publication Date (Print):March 1, 1995Publication History Published online1 May 2002Published in…
We investigate a soliton charge and energy transport in anharmonic molecular systems and show that at large enough anharmonicity parameter there are two kinds of envelope solitons, one of which is a Davydov soliton. It has the usual one-bell shape and may exist at any anharmonicity. The other kind has a two-bell shape…
The 2M potassium chloride (KCl) extraction method used to measure soil nitrate (NO3 ‐‐N) concentrations in soils may introduce some artifacts caused by soil sampling, processing, and handling. Furthermore, this method provides soil NO3 ‐‐N concentrations for soil sampled at a particular time, whereas the dynamics of t…
Microhardness and optical properties changes induced by gamma-irradiation are studied in vitreous As2S3. The observed 10-25% microhardness increase’ the shift of the absorption edge to long wavelength accompanied with a decrease in its slope (radiation-induced darkening), as well as increasing of impurity bands intens…
Abstract Size-controlled CdS nanocrystallites were prepared by using thiophenol or hexanethiol as a capping reagent by controlling the ratio of Cd2+ to bis(trimethylsilyl) sulfide (S(TMS)2) as a source of the sulfide ion in reversed micelles. Their solubility and photocatalysis were examined. A series of size-controll…
The effect of applied potential on the stress corrosion cracking (SCC) behaviour of sensitized type 316 stainless steel (SS) in high temperature water containing 5 ppm chloride over the temperature range from 100 to 300 °C has been investigated using the slow strain rate test (SSRT) technique. The results are compared…