Materials Literature
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Abstract The principal scope of this work is to explore the capacity of XPS spectroscopy in the characterization of oxides through consideration of O 1s spectra. Several examples of oxides, analysed both separately and in the form of mechanical mixtures, are reviewed. The quantitative aspects involved in the XPS analy…
Theoretical spectroscopic constants are reported for the X 1Σ+ and a 3Δ states of the fluorides, chlorides, and bromides of scandium and yttrium. The calculated D0 values (eV) are ScF(6.00), ScC1(4.55), ScBr(3.90), YF(6.72), YC1(5.36), and YBr(4.74). All systems are predicted to have 1Σ+ ground states once the effect…
For pt.I see ibid., vol.3, no.3, p.923-30 (1988). An improved model for the calculation of statistical time lags in SF/sub 6/ insulated electrode arrangements for positive impulse voltage is presented. On the basis of physical considerations, the production rate of initial electrons is ascribed to the local density of…
Atoms and Molecules Structure of Solids Phase Transformations and Phase Equilibria Defects and Imperfections in Solids Rate Processes and Crystallization Surfaces and Interfacial Phenomena Mechanical Properties Metals Ceramics and Related Materials Polymers Electronic Properties Magnetic Properties Thermal Properties…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectrochemistry and spectroscopy of magnesium phthalocyanine. Analysis of the absorption and magnetic circular dichroism spectraEdward Ough, Tebello Nyokong, Katherine A. M. Creber, and Martin J. StillmanCite this: Inorg. Chem. 1988, 27, 15, 2724–2732Publication Date (Print…
The tetragonal tungsten bronze ferroelectrics in the strontium barium niobate system have been extensively studied over many years. As for many of the bronzes, a crude interpretation of the experimental data has been attempted in the past using the simple Landau-Ginsburg-Devonshire expansion of the Gibbs free energy a…
Abstract This paper has described silicone rubber, its first commercial development in 1944, and its technological progress since then. Pioneering research on silicon opened the door to the development of silicone polymers and silicone rubber. The substitution of two methyl groups on silicon was present in the first e…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnesium anthracene systems and their application in synthesis and catalysisBorislav BogdanovicCite this: Acc. Chem. Res. 1988, 21, 7, 261–267Publication Date (Print):July 1, 1988Publication History Published online1 May 2002Published inissue 1 July 1988https://pubs.acs.org…
The electronic structures of two mixed-valence MnMn complexes, [LMnClBr]·HO (2) and [LMnBr]·1/2CHCl (3), and the Mn complex LMnCl (4) are probed. The L ligand is the dianion of the Schiff base condensation of 2 mol of 1,3-diaminopropane and 2 mol of 2,6-diformyl-4-tert-butylphenol. The X-ray structure of complex 4 has…
The effects of temperature on the assembly of collagen fibrils were examined in a system in which collagen monomers are generated de novo and in a physiological buffer by specific enzymic cleavage of type I pC-collagen, an intermediate in the normal processing of type I procollagen to type I collagen. Increasing the t…
Electrochemical copolymerization of pyrrole and thiophene has been accomplished using an acetonitrile solution containing 0.1 M thiophene and pyrrole. The production of copolymers was evidenced by IR measurements of the resulting polymers and their electrochemical properties. The electrochemical behavior of the copoly…
ABSTRACT Adsorption behavior of microcrystalline cellulose, guar gum, wheat bran and oat bran were compared at 4, 25, and 37°C. Guar gum adsorbed the most water and microcrystalline cellulose adsorbed the least. Adsorption abilities of oat bran and wheat bran were similar at low and intermediate water activity levels.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of iron(II) nitrilotriacetate and iron(II) ethylenediamine-N,N'-diacetate complexes with hydrogen peroxideJ. D. Rush and W. H. KoppenolCite this: J. Am. Chem. Soc. 1988, 110, 15, 4957–4963Publication Date (Print):July 1, 1988Publication History Published online1 Ma…
Preparation and magnetic properties of ThMn12-type phases R,Fe,Mo,(Co), R=Y, Ce, Nd, Sm, Gd, Dy, Er are described. The ternary material, without Co, exhibits saturation magnetization up to 1 T and Curie temperature up to 215 °C, the quaternary material, with Co, up to 1.2 T, and 295 °C, respectively.
Ethylene enhanced the senescence of cucumber (Cucumis sativus L. cv ;Poinsett 76') cotyledons. The effect of 10 microliters per liter ethylene was inhibited by 1 millimolar silver thiosulfate, an inhibitor of ethylene action. An increase in proteins with molecular weights of 33 to 30 kilodaltons and lower molecular we…
The formation of mullite in diphasic aluminosilicate gels of stoichiometric composition was studied by quantitative X‐ray diffraction (QXRD) and electron microscopy (AEM and SEM). The transformation is preceded by an incubation time which is apparently an activated process with an activation energy of 236 ± 15 kcal/(g…
Two constitutive acetyl-CoA acetyltransferases (3-ketothiolases A and B) were purified from Alcaligenes eutrophus. Enzyme A was active with only acetoacetyl-CoA and 3-ketopentanoyl-CoA, whereas enzyme B was active with all the 3-ketoacyl-CoAs (C4−C10) tested. Enzyme A appeared to be a tetramer (Mr 70 000) with identic…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and properties of nickel(II) and copper(II) complexes of 14-membered hexaaza macrocycles, 1,8-dimethyl- and 1,8-diethyl-1,3,6,8,10,13-hexaazacyclotetradecaneMyunghyun Paik Suh and Shin Geol KangCite this: Inorg. Chem. 1988, 27, 14, 2544–2546Publication Date (Print)…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT[S4Cd17(SPh)28]2-, the first member of a third series of tetrahedral [SWMX(SR)y]z- clustersGarry S. H. Lee, Don C. Craig, Ida. Ma, Marcia L. Scudder, Trevor D. Bailey, and Ian G. DanceCite this: J. Am. Chem. Soc. 1988, 110, 14, 4863–4864Publication Date (Print):July 1, 1988P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteractions of metals and protons with algaeRay H. Crist, Karl. Oberholser, Dwight. Schwartz, James. Marzoff, Darryl. Ryder, and DeLanson R. CristCite this: Environ. Sci. Technol. 1988, 22, 7, 755–760Publication Date (Print):July 1, 1988Publication History Published online1…