Materials Literature
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Simple empirical formulas for perpendicular and parallel polarization susceptances for a meander-line grating plate are given. The numerical results compared favorably with experimental data and published data. Simple transmission-line model in terms ofE-type mode andH-type mode for multilayered meander-line polarizer…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSonochemistry of aqueous solutions: hydrogen-oxygen combustion in cavitation bubblesEdwin J. Hart and Arnim. HengleinCite this: J. Phys. Chem. 1987, 91, 13, 3654–3656Publication Date (Print):June 1, 1987Publication History Published online1 May 2002Published inissue 1 June 1…
We present general solutions of the inhomogeneous linear elastic equations for pentagonal quasicrystals. The equations are those obtained by minimizing the harmonic elastic energy which includes a nontrivial coupling between the phason and displacement variables. Our solutions are presented in terms of the Green's fun…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA comprehensive investigation of the photophysics and photochemistry of salicylideneaniline and derivatives of phenylbenzothiazole including solvent effectsRalph S. Becker, Christian. Lenoble, and Abudi. ZeinCite this: J. Phys. Chem. 1987, 91, 13, 3509–3517Publication Date (…
Abstract Current research concerning the physical, chemical, and biological processes governing biofilm formation and peristence is reviewed. Biofilm formation processes are explained. Potential research directions in the areas of physical, biological, and genetic control of biofilm processes are also presented.
Classical soft-mode behaviour above the phase-transition temperatures is discussed phenomenologically and the discussion is applied to paraelectric phases of sixteen well known and most investigated ferroelectrics of both displacive and order-disorder type. The experimental dielectric spectra ε'(v) and ε''(v) are obta…
High-intensity femtosecond pulses tunable in the 0.8–1.6-μm range have been generated by parametric amplification of a continuum white light in a new organic crystal, N-(4-nitrophenyl)-L-prolinol (NPP). The traditional concept of noncritical phase matching was revised in view of requirements linked to the observation…
Off-axis uniaxial testing is used to characterize the nonlinear behavior of boron/ aluminum composite. An orthotropic elastic-plastic formulation is used.
X-ray scattering carried out in situ during electrochemical doping indicates an unusual sequence of structural transitions. On doping to \ensuremath{\approx}6-7 mole%, lightly doped regions coexist with a discommensurate-domain channel structure. As the Na concentration increases, the density of domain walls decreases…
Abstract A new quantitative X-ray powder diffraction (QXRPD) method has been developed to analyze polyphase crystalline mixtures. The unique approach employed in this method is the utilization of the full diffraction pattern of a mixture and its reconstruction as a weighted sum of diffraction patterns of the component…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPrescription for stabilization of ferromagnetic exchange in molecular solids via admixing of the ground state with a virtual charge-transfer excited stateJoel S. Miller and Arthur J. EpsteinCite this: J. Am. Chem. Soc. 1987, 109, 13, 3850–3855Publication Date (Print):June 1,…
We consider front formation and steady-state front motion in a one-dimensional polymer system undergoing case-II diffusion. The polymer system approximates a polymer sheet whose thickness is very small compared with its lateral dimensions. The osmotic pressure of Thomas and Windle (TW) is used in the theoretical analy…
Abstract The extent of oxidation of ethyl esters of eicosapentaenoic (EPA) and docosahexaenoic acids (DHA) was compared quantitatively with that of ethyl linoleate (Lo) and ethyl linolenate (Ln) by oxygen uptake and formation of conjugated diene, hydroperoxide and secondary oxidation products. EPA and DHA esters were…
A systematic study of the effects of polymer surface properties on the interaction with human endothelial cells (HEC) may lead to the development of small-diameter vascular grafts. HEC, suspended in culture medium containing 20% serum adhered and spread onto moderately wettable polymers such as TCPS (tissue culture po…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase transition of submicron gel beadsYoshiharu Hirose, Takayuki Amiya, Yoshitsugu Hirokawa, and Toyoichi TanakaCite this: Macromolecules 1987, 20, 6, 1342–1344Publication Date (Print):June 1, 1987Publication History Published online1 May 2002Published inissue 1 June 1987ht…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOlefin epoxidation by manganese (IV) porphyrins: evidence for two reaction pathwaysJohn T. Groves and Michael K. SternCite this: J. Am. Chem. Soc. 1987, 109, 12, 3812–3814Publication Date (Print):June 1, 1987Publication History Published online1 May 2002Published inissue 1 J…
The semiconductive properties of the passive film formed on iron were investigated by measuring the impedance of passivated iron electrodes in neutral borate and phosphate solutions. Mott‐Schottky type of plot was applied to the impedance data to obtain the donor density and the flatband potential as a function of fil…
The defect chemistry in boundary regions of ionic crystals is considered from a thermodynamic point of view. The related effects on the ionic conductivity of two‐phase mixtures and other heterogeneous systems are discussed. Experimental and theoretical findings are critically reviewed. The concept of the formation of…
Key aspects of anodic film growth on aluminium at ambient temperatures in aqueous electrolytes, encompassing barrier- and porous-type films, are described. By direct observation of film sections, incorporating inert marker layers and tracers, in the transmission electron microscope and appropriate analysis, the locati…
The effects of 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP) and 1-methyl-4-phenylpyridinium ion (MPP+) on activities of enzyme complexes in the electron transport system were studied using isolated mitochondrial preparations from C57BL/6J mouse brains. Both MPTP and MPP+ dose-dependently inhibited activity of N…