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 ISSUEPREVArticleNEXTEffect of silicate ratio on the distribution of silicate and aluminosilicate anions in TPA aluminosilicate solutionsR. F. Mortlock, A. T. Bell, A. K. Chakraborty, and C. J. RadkeCite this: J. Phys. Chem. 1991, 95, 11, 4501–4506Publication Date (Print):May 1, 1991Publication…
Recent genetic mapping of the aspartokinase II (lysC) operon of Bacillus subtilis [M. Petricek. L. Rutberg & L. Hederstedt (1989) FEMS Microbiology Letters 61, 85-88; N.Y. Chen. J. J. Zhang & H. Paulus (1989) Journal of General Microbiology 135, 2931-2940] has shown its chromosomal location to be close to the aecA loc…
Magnetron sputtering was used to deposit a thin film of lanthanum hexaboride for cathode structures. The chemistry of the coatings was studied with x-ray diffraction, Auger electron spectroscopy, and x-ray photoelectron spectroscopy. The work function and electron emission characteristics of the coating have been stud…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTransition-metal borides with the tantalum boride (Ta3B4) crystal structure: their electronic and bonding propertiesR. M. Minyaev and Roald HoffmannCite this: Chem. Mater. 1991, 3, 3, 547–557Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Pu…
Abstract Oxygen plasma treatments of transparent polymers such as polystyrene (PS) and polycarbonate (PC) were performed. Then the hydrophobic recovery of treated surfaces and its effect on their misting behavior was studied. Surface investigations, such as XPS and water contact angle measurements, were combined with…
Sediments between 10 and 15 km thick have prograded approximately 400 km into the small oceanic basin which formed along the southern margin of North America subsequent to early Mesozoic rifting. Redistribution of mass during burial diagenesis, and the chemistry of present‐day formation waters in Jurassic through Plei…
The changes in composition of the grain boundary regions in Nimonic PE16, which occur during heat treatment and on neutron irradiation, are described. The results show that the composition of these regions is sensitive to heat treatment variables, bulk composition, and irradiation. In particular, molybdenum has a stro…
This article Introduces a technology for the simultaneous control of the emissions of PCDD/ PCDF, hydrochloric acid (HCI) and nitrogen oxides (NOx) from municipal solid waste (MSW) Incinerators. The technology uses ammonia as the control medium for all three pollutants. In this paper, the theoretical basis of the tech…
Abstract The strength distribution of reaction-bonded silicon carbide tubes that failed by internal pressurization was predicted from strength distributions obtained from simple laboratory test specimens at room temperature. The strength distributions of flexure bars, C-rings tested in tension, C-rings tested in compr…
Abstract Graft copolymerization was carried out onto a poly(methyl methacrylate) (PMMA) plate for surface modification. The following treatments were conducted to introduce peroxides into the PMMA surface prior to graft copolymerization: UV irradation, corona discharge, glow discharge, and ozone exposure. The static c…
In order to study the structure of defects in nematic liquid crystals, we have constructed a numerical procedure that minimizes the Landau-de Gennes free energy model. Using a new representation, a finite-element discretization, and a direct minimization scheme based on Newton's method and successive overrelaxation, t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRole of large but defective deltahedra in the structural chemistry of very complex solid borides and gallidesJeremy K. Burdett and Enric CanadellCite this: Inorg. Chem. 1991, 30, 9, 1991–1998Publication Date (Print):May 1, 1991Publication History Published online1 May 2002Pu…
Reversible phase transformations with volume contractions were found at 18 GPa and 22 GPa when graphite was compressed at room temperature. Volume contraction was detected in a diamond anvil cell by observing a plateau in the curve of generated pressure versus the cell load. The phase realized at 18 GPa is thought to…
Reactive sputter deposition was used to grow a phase-separated 0.40 Au/0.56 Au2O3/0.04 Au-hydroxide cermet film and x-ray photoelectron spectroscopy was used to examine the Au 4f and O 1s core electron binding energy of each phase. The valence band structure of Au2O3 is reported here for the first time, and consists o…
Abstract 2‐Ethyl‐2‐hydroxymethyltrimethylene carbonate (5‐ethyl‐5‐hydroxymethyl‐1,3‐dioxan‐2‐one) ( 1 ) was treated with trimethylsilyl chloride, benzyl chloroformate and phenyl isocyanate to give the corresponding 5,5‐disubstituted 1,3‐dioxan‐2‐ones 2 , 3 and 4 . These monomers were subjected to anionic ring‐opening…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTEffects of a bridging dicarboxylate ligand on the synthesis and physical properties of (.mu.-oxo)bis(.mu.-carboxylato)diiron(III) complexesRobert H. Beer, William B. Tolman, Simon G. Bott, and Stephen J. LippardCite this: Inorg. Chem. 1991, 30, 9, 2082–2092Publication Date (…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDielectric relaxation studies of poly(4-hydroxybenzoic acid) and copolyesters based on 4-hydroxybenzoic acid and 6-hydroxy-2-naphthoic acidDouglass S. Kalika and Do Y. YoonCite this: Macromolecules 1991, 24, 11, 3404–3412Publication Date (Print):May 1, 1991Publication Histor…
Calculations are reported of the dynamic second hyperpolarizabilities (\ensuremath{\gamma}) of ${\mathrm{H}}_{2}$ and ${\mathrm{D}}_{2}$ which are relevant to three different nonlinear optical processes. They have been carried out using an expanded basis set for the \ensuremath{\Delta} states that occur in the sum-ove…
Losses were measured as a function of magnetization frequency f/sub d/ for two advanced soft magnetic alloys: laser-scribed 0.23-mm HI-B steel ZDKH (designated HB) and consolidated amorphous Powercore (designated PC). Although domain observations on HB yielded distinct domain refinements due to the laser treatment, an…
Perovskite oxides , [ and , ] containing A site defects were studied by thermal analysis, measuring of the temperature dependence of electrical conductivity (373–1273 K) and x‐ray diffraction. The results showed that underwent a phase transition accompanied by oxygen desorption at about 1000 K in air. The electrical c…