Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNickel K-edge x-ray absorption fine structure of lithium nickel oxidesIngrid J. Pickering, Graham N. George, Joseph T. Lewandowski, and Allan J. JacobsonCite this: J. Am. Chem. Soc. 1993, 115, 10, 4137–4144Publication Date (Print):May 1, 1993Publication History Published onl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSol-gel synthesis of ternary metal oxides. 1. Synthesis and characterization of MAl2O4 (M = Mg, Ni, Co, Cu, Fe, Zn, Mn, Cd, Ca, Hg, Sr, and Ba) and lead aluminum oxide (Pb2Al2O5)Lynn K. Kurihara and Steven L. SuibCite this: Chem. Mater. 1993, 5, 5, 609–613Publication Date (P…
Results from Brownian dynamics simulations of hard sphere diffusion in polymer networks of wormlike chains are presented. The influence of the size of the diffusing particles, the polymer concentration, the polymer radius, and the persistence length of the chains were investigated. The diffusion coefficients obtained…
Abstract A method of identifying and quantifying elastomers and processing oil in tire rubber, called DTG curve simulation method, is proposed. This method is based on DTG (derivative thermogravimetry) analysis of the straight elastomers NR, BR and SBR, which produces a series of decomposition rate data and pairs of k…
Calculations of Cu 2p photoelectron spectra for a ${\mathrm{Cu}}_{3}$${\mathrm{O}}_{10}$ cluster with a reduced basis set show that the introduction of more Cu sites leads to a revised interpretation of the Cu 2p spectrum. Besides the usual peaks of mainly 3${\mathit{d}}^{9}$ and 3${\mathit{d}}^{10}$L character anothe…
Abstract Incorporation of free acids or salts of antimycotic food additives, including propionic acid, benzoic acid or sorbic acid, into low‐density polyethylene (LDPE) films failed to inhibit mould growth when the films contacted inoculated media. However, LDPE films into which benzoic anhydride was incorporated exhi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTetrahedral-atom 3-ring groupings in 1-dimensional inorganic chains: beryllium arsenate hydroxide hydrate (Be2AsO4OH.cntdot.4H2O) and sodium zinc hydroxide phosphate hydrate (Na2ZnPO4OH.cntdot.7H2O)William T. A. Harrison, Tina M. Nenoff, Thurman E. Gier, and Galen D. StuckyC…
Recently a quantum size effect was proposed to be responsible for the blue shift of optical absorption edge and photoluminescence peak wavelength as well as for the porous silicon (PS) formation itself. In the debate about the mechanism of light emission from PS a correlation between particle size and luminescence pea…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRecognition of .alpha.-amino acid esters by zinc porphyrin derivatives via coordination and hydrogen bonding interactions. Evidence for two-point fixation from thermodynamic and induced circular dichroism spectroscopic studiesTadashi Mizutani, Tadashi Ema, Takashi Yoshida, Y…
Laser induced large negative reorientational nonlinearities are observed in dye-doped liquid crystal. The effect is attributed to intermolecular torque exerted by the photoexcited dye molecules, which causes the liquid crystal axis to realign in a direction orthogonal to the optical electric field. Optical nonlinearit…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFracture mechanisms of polymer interfaces reinforced with block copolymers: transition from chain pullout to crazingJunichiro Washiyama, Edward J. Kramer, and Chung Yuen HuiCite this: Macromolecules 1993, 26, 11, 2928–2934Publication Date (Print):May 1, 1993Publication Histo…
Six alkali metal tin polysulfides and one monosulfide, K2Sn2S8 (I), α-Rb2Sn2S8 (II), β-Rb2Sn2S8 (III), K2Sn2S5 (IV), Cs2Sn2S6 (V), and Cs2SnS14 (VI), respectively, were synthesized by a molten salt technique. I and IV were made by heating mixtures of Sn/K2S/S (molar ratio 1/2/8) at 275 and 320°C, respectively, for 4-6…
Resistance to room temperature oxidation and control over wetting properties can be achieved by chemical modification of a porous‐silicon surface. Fourier transform infrared spectroscopy was used in the transmission mode to monitor the surface chemistry of both treated and untreated porous‐silicon samples before and a…
An algorithm is presented for the computation of the saturation characteristics of transformer iron cores based on supplied conventional V/sub rms/-I/sub rms/ curves and no-load losses at rated frequency. Laboratory measurements on a steel sample were carried out. It is shown that the iron core losses are a nonlinear…
Abstract Barite-celestite solid solutions have been synthesized under controlled conditions by the counter-diffusion of Ba 2+ , Sr 2+ and SO 4 2– ions through a porous transport medium (silica gel), to investigate the factors which control compositionalzoning. The equilibrium compositions of solid solution and aqueous…
In prsA (protein secretion) mutants of Bacillus subtilis, decreased levels of exoproteins, including alpha-amylase and subtilisins, are found extracellularly. The effect of prsA on subtilisin secretion is elaborated here. Extracytoplasmic folding and secretion of active subtilisin is assisted by the N-terminal pro-seq…
The conversion of a solid copolymer (ViSiHNH) x ─(MeSiHNH) y into a ceramic was studied in the 20–1450°C temperature range under different atmospheres (inert or oxidative). The ceramic yield, the ceramic composition, and the gaseous evolution directly depend on the heating rate, the pyrolysis atmosphere, and the durat…
A new technique for inducing a large permanent second-order susceptibility in lead silicate glass is reported. The procedure involves implanting electrons by irradiating the glass with an electron beam. Second-order nonlinearities chi((2)) as high as 0.7 pm/V are obtained.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSimultaneous crystallization of diamond and cubic boron nitride from the graphite relative boron carbide nitride (BC2N) under high pressure/high temperature conditionsTakayoshi Sasaki, Minoru Akaishi, Shinobu Yamaoka, Yoshinori Fujiki, and Tetsuo OikawaCite this: Chem. Mater…
International audience