Materials Literature
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A concentration dependence of elastic and viscous properties of nematic poly-\ensuremath{\gamma}-benzyl glutamate (PBG) was studied experimentally. The splay and bend constants are similar in magnitude, both linear in concentration. The twist constant is much smaller and constant. Viscosities exhibit large anisotropie…
The corrosion products of iron formed in 3% sodium chloride solution under various conditions of temperature, pH values of the solution, concentrations of dissolved oxygen, and durations of immersion were analyzed by conversion electron Mössbauer spectrometry (CEMS) at room and dry ice temperatures (297 and 200 K), pa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComparison of the translational diffusion of large spheres and high-molecular-weight coils in polymer solutionsWyn Brown and Roger RymdenCite this: Macromolecules 1988, 21, 3, 840–846Publication Date (Print):March 1, 1988Publication History Published online1 May 2002Publishe…
X-ray diffraction patterns of GeS2 and GeO2, glasses under pressure up to 100 kbar have been measured in order to examine their medium-range structure. Qualitative differences have been found between the pressure dependences of the first sharp diffraction peaks, suggesting distinct glassy structures. The first peak in…
Department of Ophthalmology University Hospital Division of Clinical Immunobiology Department of Internal Medicine University of Innsbruck Austria
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNMR of silk fibroin. 8. Carbon-13 NMR analysis of the conformation and the conformational transition of Philosamia cynthia ricini silk fibroin protein on the basis of Bixon-Scheraga-Lifson theoryTetsuo Asakura, Hitoshi Kashiba, and Hiroaki YoshimizuCite this: Macromolecules…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProtection and polymerization of functional monomers. 11. Synthesis of well-defined poly(4-vinylbenzoic acid) by means of anionic living polymerization of 2-(4-vinylphenyl)-4,4-dimethyl-2-oxazolineAkira Hirao, Yoshiaki Ishino, and Seiichi NakahamaCite this: Macromolecules 19…
Abstract A systematic study of the process variables for polyester composites based on different natural fibers like jute, sisal, ramie, and pineapple has been made with a view to determine the most suitable processing conditions for such composites. Effect of polyesteramide polyol (PEAP) as interfacial agent in such…
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…