Materials Literature
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Pellets formed from isolated bovine growth plate chondrocytes were grown in various capacitively coupled electrical fields. The signals chosen were 0, 10, 100, 250, 500, 750, 1,000, and 1,500 V peak-to-peak, 60 kHz. The effect on cell proliferation and matrix production of these different voltages was determined by [3…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAccurate self-diffusion coefficients of lithium(1+), sodium(1+), and cesium(1+) ions in aqueous alkali metal halide solutions from NMR spin-echo experimentsBernd M. Braun and Hermann WeingaertnerCite this: J. Phys. Chem. 1988, 92, 5, 1342–1346Publication Date (Print):March 1…
Bacillus subtilis strains containing a deletion in the gene coding for the major small, acid-soluble, spore protein (SASP-gamma) grew and sporulated, and their spores initiated germination normally, but outgrowth of SASP-gamma- spores was significantly slower than that of wild-type spores. The absence of SASP-gamma ha…
Silicon‐29 nuclear magnetic resonance has been used to probe the effects of temperature and the addition of reactive silica on the silicate structure of amorphous calcium silicate hydrate (C‐S‐H), produced by the hydration of alite (Ca 3 SiO 5 ). Both an increase in the temperature of formation and the addition of rea…
Abstract Quantitative scale of a new parameter d has been proposed for the spectrochemical series of ligands in the mixed ligand complexes of d6 metals, which enables us to predict the positions of low energy d–d absorption bands of a d6 complex. Introduction of a new reduction parameter α has improved the prediction…
Abstract Various morphologies can be realized via processing of incompatible polymer blends such as droplets or fibers in a matrix and stratified or cocontinuous structures as is shown for the model system polyethylene/polystyrene The structures induced are usually intrinsically unstable. Modelling of extrusion proces…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSterically hindered magnesium aryloxidesJoseph Calabrese, Martin A. Cushing Jr., and Steven D. IttelCite this: Inorg. Chem. 1988, 27, 5, 867–870Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Published inissue 1 March 1988https://pubs.acs.…
On Pb2CoWO6 the linear (ME)H effect has been measured in the ferromagnetic/ferroelectric phase (T < 7.6K) and the quadratic one in its paramagnetic/ferroelectric phase (T > 7.6K). On Pb2FeTaO6 the quadratic (ME)H-effect has been measured (4–17K), a new magnetic transition evidenced at ∼ 9K and the magnetoelectric coef…
Abstract A detailed model for emulsion polymerization is compared with extensive data from continuous stirred tank reactors. Model predictions are compared with both steady‐state and dynamic data, for polymerization of styrene, methyl methacrylate, and vinyl acetate. Good agreement between model and experiment is achi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAb initio calculations of the effects of substituents on the stabilization of silyl radicals versus methyl radicalsMichael B. Coolidge and Weston Thatcher. BordenCite this: J. Am. Chem. Soc. 1988, 110, 7, 2298–2299Publication Date (Print):March 1, 1988Publication History Pub…
A study has been conducted to determine the frictional characteristics of several fabrics used in apparel. The objective was to generate fabric frictional data to help in developing automated assemblies for fabrics. The results revealed that the coefficients of static and dynamic friction between fabrics decreased as…
Das bekannte, äußerst reaktive [18]Annulen 1 und das hypothetische Isomer 2 sollten sich durch CH 2 ‐ und CHCH‐Gruppen als innere bzw. äußere Brücken stabilisieren lassen. Die entsprechenden Kohlenwasserstoffe 3 bzw. 4 sind nicht bekannt, obwohl sie als Bindeglieder zwischen den nicht‐natürlichen Annulenen und dem Po…
Abstract The clay-mineralogical assemblages of Purbeckian carbonate sediments of the Swiss and French Jura Mountains are often composed of illite and interstratified illite-smectite. These illitic minerals occur mainly in thin layers of green marls which show evidence of subaerial exposure and mark the top of shallowi…
Abstract A kinetic model for the free‐radical‐initiated molecular weight degradation of polypropylene was further developed. The model has a single variable parameter, the initiator efficiency, f. Assumptions were detailed, new comparisons with experimental data presented, and model sensitivity to the value of f evalu…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTIsolation of a bis-oxo-bridged manganese(III)manganese(IV) intermediate by regulated air oxidation. Synthesis, structure, and properties of dioxobis[tris(aminoethyl)amine]dimanganese(5+) trifluoromethylsulfonateKarl S. Hagen, William H. Armstrong, and Hakon HopeCite this: In…
We present a density-functional theory for the growth of equilibrium nematic and smectic-A wetting layers near free surfaces. In the nematic case our theory predicts complete wetting, with the integrated order parameter diverging logarithmically as one approaches the ordering temperature from the isotropic phase. When…
Abstract Four periods of loess deposition in the Lower Mississippi Valley can be identified on the basis of geochemical and mineralogical criteria, radiocarbon dating, and thermoluminescence dating. These are designated Loess Units 1,2,3, and 4 in order of increasing age. Carbonate‐rich Unit 1 loess comprises more tha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSize effects on the .alpha.-.beta. transformation of phthalocyanine crystalsFumio IwatsuCite this: J. Phys. Chem. 1988, 92, 6, 1678–1681Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Published inissue 1 March 1988https://pubs.acs.org/doi/…
A sol-gel process for low-temperature preparation of BaTiO{sub 3} powders is described. Chemical polymerization between barium acetate and titanium(IV) isopropoxide leads to the formation of barium titanate gels. After suitable drying and calcination treatments, the barium titanate gels were converted to BaTiO{sub 3}…
Abstract Polypropylene was degraded by injection of a free‐radical initiator during extrusion. Molecular weight distribution, molecular weight averages, and melt flow index were measured to see the effect of initiator concentration (0.00 to 0.04 wt%), temperature (200 and 220°C), and screw rpm (31 and 44). Initiator c…