Materials Literature
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Planar growth of a solid germ of infinitesimal initial thickness from an undercooled melt is addressed within a continuum model with linear interfacial kinetics. For this problem, we present an analytic solution that describes the global features of the process beyond the initial and long-time limits. In particular, i…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProduction and Toxicity Assessment of Sophorosides from Torulopsis bombicolaSerge Krivobok, Pascale Guiraud, Francoise Seigle-Murandi, and Regine SteimanCite this: J. Agric. Food Chem. 1994, 42, 5, 1247–1250Publication Date (Print):May 1, 1994Publication History Published on…
(CH3NH3)3Sb2Br9 crystals were studied by pyroelectric method in the temperature range 10 – 200 K. Pyroelectric measurements revealed reversal spontaneous polarization below 141 K along the a-axis. The optical observations showed that MABA possesses ferroelastic domains in all low temperature phases.
Abstract The free energies of mixing of two networks in the interpenetrating polymer network based on crosslinked polyurethane and poly(ester acrylate) have been determined by the vapour sorption method. It was established that the constituent networks in the IPN are not miscible. The introduction of fillers of differ…
Isocitrate dehydrogenase (ICDH) from an extreme thermophile, Thermus thermophilus HB8, was overexpressed in Escherichia coli. The enzyme was easily purified to homogeneity by a combination of heat treatment (70 degrees C, 20 min) and column chromatography. The N-terminal sequence of the protein thus purified coincided…
The composition dependence of Raman spectra was measured to study the borate anomaly in cesium borate glass. The changes of structural groups were estimated by the internal vibrational bands. The boson peak of pure borate glass is well fitted only by the function deduced from the disorder-induced model, whereas that o…
The contact mechanics of sharp “glass‐cutting” rollers is analyzed. Assuming the contact to be plastic, expressions are developed for the width and length of a static contact and the width of a rolling track. The residual stress‐intensity factor and stable length for median cracks generated beneath a roller track are…
The object of this study is to understand the mechanism of the growth of a cavity in homogeneous liquids. The cavitation intensity obtained by Niemczewski [Ultrasonics 18, 107–110 (1980)] was elucidated on the basis of the theory of fluctuations proposed by Landau and Lifshitz [Statistical Physics (Pergamon, Oxford, 1…
Cotton is currently graded on its color, leaf, and preparation. Individual component measurements for color and trash are currently reported along with the cotton grades. The cotton industry now requires a method to identify all types of trash in a sample. An image processing system, a test of feature invariance, and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhysical and Spectroscopic Studies of Polypyrrole Films Containing Transition-Metal EDTA ChelatesBrian R. Saunders, Keith S. Murray, Robert J. Fleming, Dougal G. McCulloch, L. Joan Brown, and John D. CashionCite this: Chem. Mater. 1994, 6, 5, 697–706Publication Date (Print):…
Conference Article| May 01 1994 The mitochondrial long-chain trifunctional enzyme: 2-enoyl-CoA hydratase, 3-hydroxyacyl-CoA dehydrogenase and 3-oxoacyl-CoA thiolase Bruce Middleton Bruce Middleton 1Department of Biochemistry, Nottingham University Medical School, Nottingham NG7 2UH, U.K. Search for other works by this…
Enhancement of the sensitivity of photopolymers is needed if photopolymers are to find more extensive applications in the printing and microlithography industries. A new concept is presented for sensitivity enhancement: the use of surface‐activated microgels as a heterogeneous polymer matrix. The preparation of the mi…
Polarization experiments and a potentiostatic pulse technique have been used to show that a monolayer coverage of zinc effectively inhibits the absorption of hydrogen into Monel K500. By depositing a monolayer of zinc on Monel K500, the hydrogen evolution reaction and hydrogen ingress flux rate were reduced by 60%.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHigh-Temperature Kinetics of Si + N2OHans Juergen Mick and Paul RothCite this: J. Phys. Chem. 1994, 98, 20, 5310–5313Publication Date (Print):May 1, 1994Publication History Published online1 May 2002Published inissue 1 May 1994https://pubs.acs.org/doi/10.1021/j100071a022http…
Abstract Ordered structures of poly(1H,1H,2H,2H‐perfluorodecyl α‐fluoroacrylate) (P17FF), poly(α‐chloroacrylate) (P17FC), poly(methacrylate) (P17FM) and poly(acrylate) (P17FA) were investigated by X‐ray diffraction, DSC and polarizing microscopic observations. At room temperature, both P17FF and P17FC prefer the layer…
Abstract A series of novel fluorine‐containing aromatic homopolyazomethines and copolyazomethines were synthesized by solution polycondensation of perfluoroisopropylidene (perfluoropropane‐2,2‐diyl) group‐containing aromatic diamines, 2,2‐bis[4‐(4‐aminophenoxy)phenyl]‐1,1,1,3,3,3‐hexafluoropropane (4,4′‐[1,1,1,3,3,3‐h…
Reports on the importance of the mechanical properties of sewing thread and its interaction with the sewing process.
In order to evaluate the efficiency of various commercial chemical fabric softeners, a technique of obtaining subjective assessment known as 'magnitude estimation' was used to estimate the fabric softness. Particular emphasis was given to subjective scaling and limits of human perception. Comparison between softness a…
We introduce a technique to correct synchrotron brightness maps for their dependence on observing frequency. This correction depends on the shape or "colors" of the synchrotron spectrum and corresponds to the K- correction used for photometry of redshifted galaxies. Using this corrected map and a spectral index map, w…
Abstract Lattice parameters were measured at pressures up to 4GPa (40kbar) for [Co(NH 3 ) 5 NO 2 ]XY (XY=Cl 2 , Br 2 , Cl(NO 3 )) by X‐ray powder diffraction using a Diamond Anvil Cell (DAC) technique. Continuous anisotropic lattice distortion with increasing pressure was observed. Strain tensors were calculated at di…