Materials Literature
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A Landau-model free energy describing possible ${\mathrm{TaTe}}_{4}$ and ${\mathrm{NbTe}}_{4}$ distorted states resulting from transverse columnar distortions is constructed and analyzed, and solutions corresponding to various commensurate and incommensurate states are found. The possibilities of accounting for the ex…
Abstract In the approach to a cycle‐invariant state in the forced feed concentration cycling of the CO oxidation over a NiO catalyst, a very long transient has been observed lasting 80 ks or more. This transient appears to be associated only with CO pretreatment of the catalyst and is not a general phenomenon. The slo…
Streptomyces hygroscopicus var. jinggangensis produces validamycin, an important antibiotic used in agriculture. It was found that there was a positive correlation between the specific activity of mycelial glutamine synthetase (GS) and validamycin biosynthesis in our laboratory. So, in this paper, the purification, ch…
Abstract Quantitative estimation of matrix‐filler interaction in highly loaded ferrite filled Styrene‐isoprene‐styrene block copolymer has been attempted through dynamic viscoelastic melt studies. A correlation between the interaction parameter in the melt state and that in the solid state at comparable frequency of d…
Основные представления Рѕ переходах металл–диэлектрик РІ соединениях 3d-металлов, Зайцев Р .Рћ., РљСѓР·СЊРјРёРЅ Р•.Р’., Овчинников РЎ.Р“.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics and equilibria of silver(1+) and lead(2+) cryptates in dimethyl sulfoxideB. G. Cox, J. Garcia-Rosas, H. Schneider, and Ng Van TroungCite this: Inorg. Chem. 1986, 25, 8, 1165–1168Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Publ…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFurther morphological studies of trans-1,4-polyisoprene crystallized from solutionJiarui Xu and Arthur E. WoodwardCite this: Macromolecules 1986, 19, 4, 1114–1118Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 198…
Abstract With a view to discovering new electron donors for low-dimensionally metallic materials, the title compounds were prepared via the corresponding 1,8-dichalcogen-bridged naphthalenes. Their donor characters were examined by cyclic voltammetry, as compared with those of the reference compounds.
The research investigations aiming at taking advantage of the chemical and structural consequences of ligand macrocyclization are reviewed with regard to the three features as follows: (1) Tetraazacycloalkane complexes which take up carbon dioxide as ROCO2 − or R2NCO2 −; (2) Correlation between axial and inplane coord…
Abstract Chemical reactions in the epoxy‐functional silane hydrolyzate bulk have been studied by Fourier transform infrared spectroscopy (FT‐IR). It was found that the silanol group opened the epoxy ring upon heating, concurrently with the silanol condensation. The kinetics of these reactions were studied, and the rel…
Abstract Poly(ϵ‐caprolactam) (PCL) with improved flame‐retardant (FR) properties can be easily obtained by activated anionic polymerization of the monomer, ϵ‐caprolactam (C), in the presence of adequate amounts of red phosphorus (red P). Analogous results with reduced P content can be achieved by coupling red P with a…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChain flexibility parameter and persistence length of various poly(methacrylic acid esters)Michel TricotCite this: Macromolecules 1986, 19, 4, 1268–1270Publication Date (Print):April 1, 1986Publication History Published online1 May 2002Published inissue 1 April 1986https://p…
A linear correlation between the degree of overloading on the crack tip and brittleness was observed. The intercept, which was √2, is identified with a minimum condition of overloading where branching occurs at twice the fracture energy. The slope was identified with the degree of plastic deformation at the crack tip…
Abstract Photoelectrochemical polymerization of pyrrole occurs at irradiated areas of semiconducting electrodes in aqueous solution of pyrrole. Organic conducting polypyrrole patterns were formed on semiconductors by area-selective irradiation of the semiconductor electrodes. The deposition rate was 0.5–0.7 μm per 100…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHydrophobic, regiospecific guest binding by transition-metal host complexes having permanent voids as revealed by FT-NMR relaxation studiesThomas J. Meade, Whei Lu. Kwik, Norman. Herron, Nathaniel W. Alcock, and Daryle H. BuschCite this: J. Am. Chem. Soc. 1986, 108, 8, 1954–…
High-resolution heat capacity measurements have been carried out in the smectic-A--hexatic-B--crystal-B transitions of the compound 4-propionyl-4'-(n-heptanoyloxy)azobenzene. Qualitatively, the heat-capacity anomalies of this smectic-A--hexatic-B--crystal-B transition sequence mimic those of the smectic-C--smectic-I--…
The equations of Dill for bleaching of photoactive compound in positive photoresists have been solved analytically in closed form. As an application, the contrast γ, has been evaluated explicitly in the absence of reflection from the substrate.
Two new techniques for determining the emissivity, reflectivity and transmissivity of fabrics in the infra-red region of the spectrum are described and experimental results reported. Results obtained by both techniques compared favourably. The thermal radiative properties of many textile fabrics were found to be somew…
A model is developed for the thermally activated motion of 1/2〈110〉 superpartial dislocations on {010} planes and 1/3〈112〉 superpartials on {111} planes, when antiphase boundaries on {111} planes are unstable. These two superpartials are sessile because they have non-planar cores. The model is based on Duesbery′s mode…
We analyze the thermodynamic properties of the metal-insulator transitions at nonzero temperature in the paramagnetic phase, within a model proposed recently. The correlated motion of electrons is expressed through a band narrowing \ensuremath{\Phi} which reflects a restricted hopping of electrons due to on-site Coulo…