Materials Literature
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Molecular-dynamics simulations have been carried out on a ``soft-sphere'' model for binary alloys quenched into supercooled and amorphous states. The main emphasis of the work is on the static and dynamic characterization of the glass transition. A comparison between molecular-dynamics data and the results of a self-c…
We have determined the three-dimensional structure of two crystal forms of an antilysozyme Fab-lysozyme complex by x-ray crystallography. The epitope on lysozyme consists of three sequentially separated subsites, including one long, nearly continuous, site from Gln-41 through Tyr-53 and one from Gly-67 through Pro-70.…
This paper reviews and analyzes the literature on thin carbon layers with emphasis on their use as protective overcoats for thin-film magnetic media. We discuss carbon as a material, its preparation as a thin film, and review and evaluate various techniques for characterizing its thin-film properties.
We computed the specific heat of site lattice animals with nearest-neighbor attractive interaction for various animal sizes N, with N up to 80, on the simple-cubic lattice. For fixed N, the specific heat as a function of the temperature exhibits a peak at a temperature ${T}_{m}$(N) depending on N. As N increases, this…
Using angular momentum representation a method is proposed that allows the systematic construction of a generalized Landau-de Gennes elastic free energy of liquid crystals, in powers of a symmetric and traceless tensor order parameter, polarization field, of external fields and all respective derivatives. By this meth…
With the use of differential thermal analysis, X‐ray diffraction, and transmission electron microscopic techniques, we showed that γ‐Al 2 O 3 type spinel phase is solely responsible for the 980°C exotherm in the kaolinite‐to‐mullite reaction series. Transmission electron microscopic characterization indicated that the…
A complex new magnetic refrigerant, suitable for the ideal Ericsson cycle, has been investigated. Above ∼15 K it is necessary to use ferromagnets as a magnetic refrigerant. However, temperature variation for the magnetic entropy change in a homogeneous ferromagnet is not suitable for the Ericsson cycle. The present pa…
ABSTRACT Evaluation of the effect of pressure on the temperature of interlayer water loss (dehydration) by smectites under diagenetic conditions indicates that smectites are stable as hydrated phases in the deep subsurface. Hydraulic and differential pressure conditions affect dehydration differently. Smectites under…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTImplications of large RGA-elements on control performanceSigurd Skogestad and Manfred MorariCite this: Ind. Eng. Chem. Res. 1987, 26, 11, 2323–2330Publication Date (Print):November 1, 1987Publication History Published online1 May 2002Published inissue 1 November 1987https://…
A model is presented of the steps involved in the manufacturing process of semicrystal line thermoplastic matrix composites. The model relates the temperature and pressure ap plied during processing to a) the flow of the matrix into the fiber tow, b) the formation of contact and bond between adjacent plies, and c) the…
Type I procollagen was purified from the medium of cultured human fibroblasts incubated with 14C-labeled amino acids, the NH2-terminal propeptides were cleaved with procollagen N-proteinase, and the resulting pC-collagen was isolated by gel filtration chromatography. pC-collagen did not assemble into fibrils or large…
Abstract The size of the minor phase in an immiscible polymer blend can have a significant effect on properties such as the impact strength. Few studies, however, have quantitatively considered the parameters controlling the size of the dispersed phase. In this paper, light and scanning electron microscopy have been u…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCation or solvent-induced supermolecular phthalocyanine formation: crown ether substituted phthalocyaninesNagao Kobayashi and A. B. P. LeverCite this: J. Am. Chem. Soc. 1987, 109, 24, 7433–7441Publication Date (Print):November 1, 1987Publication History Published online1 May…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation Douglass S. Kalika, Morton M. Denn; Wall Slip and Extrudate Distortion in Linear Low‐Density Poly…
Probably the strongest uncharged nitrogen bases are readily accessible, unusually stable oligophosphazenes such as 1–3 (pKa(H2O)≤29–30). They are efficient dehydrohalogenating reagents for primary and secondary halides and exhibit low nucleophilicity. Their stability is revealed by, among other things, the fact that 1…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTrivacant heteropolytungstate derivatives. 3. Rational syntheses, characterization, two-dimensional tungsten-183 NMR, and properties of tungstometallophosphates P2W18M4(H2O)2O6810- and P4W30M4(H2O)2O11216- (M = cobalt, copper, zinc)Richard G. Finke, Michael W. Droege, and Pe…
Neutral amino acid (NAA) transport across the blood-brain barrier was examined in pentobarbital-anesthetized rats with an in situ brain perfusion technique. Fourteen of 16 plasma NAAs showed measurable affinity for the cerebrovascular NAA transport system. Values of the transport constants (Vmax, Km, KD) were determin…
Abstract The effect of the microstructure on the coercive field of sintermagnets is investigated on the basis of the theory of micromagnetism. From the linearized micromagnetic equations nucleation fields are determinded for magnetic inhomogeneities with quasi‐harmonic spatial variations of the magnetocrystalline anis…
The cathodic polarization of the electrodes sputtered on yttria stabilized zirconia electrolyte was studied at 800°C in air. The system showed high electrode activity for oxygen reduction. The study of the electrode resistance as functions of and temperature revealed that the rate‐determining steps for oxygen reductio…
Abstract Dolomite rock textures can be classified according to crystal size distribution and crystal boundary shape. The classification scheme presented here is largely descriptive but carries genetic implications because size distribution is controlled by both nucleation and growth kinetics, and crystal boundary shap…