Materials Literature
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Peptidylarginine deiminase (proteinarginine iminohydrolase, EC 3.5.3.15) converted some arginine residues to citrulline residues in soluble vimentin, in a micromolar Ca2+-dependent manner and resulted in the loss of polymerization competence of the intermediate filament protein. When about 8 mol of residues/mol of vim…
The lattice model for linear polymeric glasses proposed by Gibbs and Di Marzio several decades ago is used to calculate the average relaxation time for the structure of the model as a function of temperature. Using the fact that the model exhibits the existence of a temperature ${T}_{0}$ for which the configurational…
The pressure drop and wetting film thickness for isolated bubbles and bubble trains moving in circular and square capillaries are computed. An arclength-angle formulation of a composite lubrication equation allows for the numerical matching of the lubrication solution of the transition region to the static profiles aw…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAsymmetric hydroxylation by a chiral iron porphyrinJohn T. Groves and Peter ViskiCite this: J. Am. Chem. Soc. 1989, 111, 22, 8537–8538Publication Date (Print):October 1, 1989Publication History Published online1 May 2002Published inissue 1 October 1989https://pubs.acs.org/do…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure of a grafted polymer brush: a molecular dynamics simulationMichael Murat and Gary S. GrestCite this: Macromolecules 1989, 22, 10, 4054–4059Publication Date (Print):October 1, 1989Publication History Published online1 May 2002Published inissue 1 October 1989https://…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
By means of a gas‐tight electrochemical cell, oxygen permeation measurements have been performed on the oxygen ion conductor 8 mole percent (m/o) yttria‐stabilized zirconia, as a function of T (800°–1050°C) and p O 2 (0.21–10 −17 atm). Ionic conductivity was measured by the conventional four‐probe method. The followin…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
Geometric measure theory is the mathematical framework for the study of crystal growth, clusters of soap bubbles, and similar structures involving minimization of energy. Morgan emphasizes geometry over proofs and technicalities, and includes a bibliography. This Second Edition features a new chapter on soap bubbles.
Etude experimentale de la variation de la durete en fonction de la grosseur de grain pour des materiaux nanocristallins. En contraste avec la relation de Hall-Petch, cette analyse, realisee sur le cuivre et le palladium a la temperature ambiante, montre un decroissement de la durete lorsque la grosseur de grain decroi…
The present review deals with the latest achievements in the chemistry of ionic melts and liquid crystals (LC). New liquid crystals, formed by salt melts containing organic ions, have been described. The characteristics of their thermodynamic and transport behaviour, structure, and optical properties have been examine…
The third-order optical susceptibility of the Pt, Pb, and metal-free tetrakis(cumylphenoxy)phthalocyanines was measured by degenerate four-wave mixing at 1.064 μm, far from strong absorption bands. Metal substitution strongly enhances the off-resonant χ(3). The χ(3)xxxx for Pt-phthalocyanine (2×10−10 esu) and Pb phtha…
Radiation-induced changes in high-purity fused silica during prolonged irradiation with a pulsed laser at 193 nm have been studied. Radiolytically induced UV absorption bands, an increase in index of refraction, and stress birefringence are observed. The formation mechanisms are analyzed in terms of radiolytic atomic…
Abstract A systematic study of dielectric spectrum on a series of high and low density commercial polyethylenes has been performed. Every polyethylene was characterized by determination of molecular weight distribution, the number of functional groups: ketone, aldehyde, vinyl, vinylidene, trans ‐vinylene, the fraction…
Abstract The novel allenic epoxycyclohexanes 1 , and related compounds 2 and 3 have been isolated from the culture medium of Eutypa lata. Their structures were established by combination of spectroscopic and chemical techniques. Biogenetic origin and biological activity of these compounds are also discussed.
Abstract Natural rubber–polyolefin (70/30) blends have been studied by incorporation of modified rubber and plastic phases with a view to make the heterogeneous phases compatible. The modified rubbers used were epoxidized natural rubber (ENR) and sulfonated ethylene–propylene diene rubber (S‐EPDM) at a level of 20 par…
Abstract A comparative study is undertaken of the dielectric relaxation spectra of poly(methyl acrylate), poly(ethyl acrylate), and poly(butyl acrylate), taking into consideration the spectra of the corresponding polymers in the series of the polymethacrylates. The three polymers, PMA, PEA, and PBA, present an α relax…
Polyester Polyols from Glycolyzed PET Waste: Efect of Glycol Type on Kinetics of Polyesterification*hydroxyl to carboxyl ratio, to obtain the polyester polyols.The kinetics of polyesterification of the three glycolyzed PET products with adipic acid under conditions comparable to commercial scale processing is reported…
The cofactor requirements of dehydroquinate synthase from Escherichia coli have been characterized. The homogeneous enzyme, purified from the overproducing strain RB791 (pJB14), is a monomeric metalloenzyme of Mr = 39,000 that contains 1 mol of tightly bound Co(II) according to atomic absorption analysis. The holoenzy…
Helical complexes formed between fd DNA and reductively methylated fd gene 5 protein were indistinguishable by electron microscopy from complexes formed with the nonmethylated protein. 13C NMR spectroscopy of 13C-enriched N epsilon, N epsilon-dimethyllsyl residues of the protein showed that three of these residues (Ly…