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。
Abstract Samples of poly(vinylidene fluoride) were crystallized either (a) isothermally at a series of temperatures, or (b) in the presence of varying amounts of diluent (dimethylphthalate or dimethylacetamide). The α‐polymorph was the only crystalline form present in these samples. Melting points of the first series…
The corrosion behavior of sintered SiC in gaseous environments and alkaline melts was investigated at 900°C. In oxidizing atmospheres such as normally exist in a gas turbine, SiC forms a dense coherent surface film of SiO 2 which is not corroded by thin layers of condensed sodium sulfate. However, under some condition…
Abstract N ‐Acetylchitosan gel, a polyhydrate of chitin, and partially O ‐acetylated N ‐acetylchitosan gel were produced by a facile acetylation of chitosan with acetic anhydride in 10% acetic acid and in aqueous acetic acid/methanol at room temperature. Under the same conditions, a series of N ‐acylchitosan gels was…
Aminooxyacetate and alpha-amino-gamma-aminooxybutyrate (canaline) react specifically with the P-pyridoxal groups of cystathionase to produce characteristic changes in the absorption and fluorescence properties of the bound cofactor. The increase in fluorescence at 450 nm was used to monitor the reaction. Aminooxyaceta…
Electric field-induced deformation is studied in a unique hybrid-aligned nematic (HAN) cell, in which the director of a nematic liquid crystal (LC) with either positive or negative dielectric anisotropy is varied continuously, lying perpendicular to one substrate and parallel to the other. The experimental results sho…
Abstract Overall growth and dissolution rates of potash alum crystals have been measured over the size range 3 to 70 μm. The derived surface integration growth kinetics, which are found to be linear with respect to supersaturation and strongly size dependent, are evaluated in terms of the step model of crystal growth.…
Abstract The location of iron in five deferrated soil kaolinites and several reference samples has been investigated using chemical analyses, acid dissolution and electron paramagnetic resonance spectroscopy. The iron of most of the kaolinites can be divided into a 'structural iron' content, measured by the amount of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe dioxygen adduct of meso-tetraphenylporphyrinmanganese(II), a synthetic oxygen carrierBrian M. Hoffman, Charles J. Weschler, and Fred BasoloCite this: J. Am. Chem. Soc. 1976, 98, 18, 5473–5482Publication Date (Print):September 1, 1976Publication History Published online1…
We describe studies of the Pt(100) – (1×1) and Pt(100) – (5×20) surfaces with LEED, UPS, AES, and flash desorption spectroscopy. The clean Pt(100) – (1×1) surface is prepared by adsorbing CO, then reacting it off with oxygen ions in the form of CO2. The clean (1×1) surface formed is metastable, converting back to the…
Abstract Thermal behavior of glasses, as observed from the isobaric variations of volume, v , and enthalpy, H , is analyzed in terms of retardation kinetics. A phenomenological theory involving a single retardation time, τ, is developed, assuming that molecular mobility is controlled essentially by the actual free vol…
Abstract The drawing behavior of a series of linear polyethylene homopolymers with weight‐average molecular weight (M̄ w ) ranging from 67,800 to ∼3,500,000 and variable distribution (M̄ w /M̄ n = 5.1−20.9) has been studied. Sheets were prepared by two distinct routes: either by quenching the molten polymer into cold…
A review of the current understanding of nitric oxide production in hydrocarbon/air and hydrogen/air combustion processes shows that the extended Zeldovich mechanism yields accurate nitric oxide predictions for fuel/air equivalence ratios from zero to infinity for hydrogen combustion and from zero to about 1.5 for hyd…
The first part of this work concerns a thorough study of both global and local field equations that govern deformable (not necessarily linear elastic) ferrimagnets and antiferromagnets from a phenomenological viewpoint. The main tool used is a generalized version of d’Alembert’s principle, valid for both reversible an…
In previous publications the performance of a high field-high gradient magnetic filter was calculated using a particle trajectory model to obtain the capture cross section of the fibers. The configuration of the particle buildup was assumed to be constant without considering the forces on the particle after impinging…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInitiation of Polypropylene Photooxidation. 2. Potential Processes and Their Relevance to StabilityD. J. Carlsson, A. Garton, and D. M. WilesCite this: Macromolecules 1976, 9, 5, 695–701Publication Date (Print):September 1, 1976Publication History Published online1 May 2002P…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPoly(vinylamine hydrochloride). Synthesis and utilization for the preparation of water-soluble polymeric dyesDaniel J. Dawson, Richard D. Gless, and Robert E. Wingard Jr.Cite this: J. Am. Chem. Soc. 1976, 98, 19, 5996–6000Publication Date (Print):September 1, 1976Publication…
Abstract Spanish montmorillonites from Frente Archidona were used to demonstrate the determination of charge density, CEC and, in mixtures, the montmorillonite content by the aikylammonium method. Special attention is directed to heterogeneous montmorillonites and the determination of the charge density distribution.…
Summary Thirty‐three samples of Ando soils were extracted by sodium pyrophosphate (O.IM; pH 10) and by dithionite‐citrate. The Al, Fe, and C contents of these two extracts offer a means of differentiating the status of humus in relation to Al and Fe in the different horizons. The humus that forms at first in the Al ho…
M H Loretto and R E Smallman London: Chapman and Hall 1976 pp ix + 134 price £5.50 (cased), £3.50 (paperback) This book, based on courses given by the authors at Birmingham University, is aimed at providing students and young experimentalists with simple explanations of transmission electron microscope techniques for…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolution Properties of Poly(D-β-hydroxybutyrate). 1. Biosynthesis and CharacterizationS. Akita, Y. Einaga, Y. Miyaki, and H. FujitaCite this: Macromolecules 1976, 9, 5, 774–780Publication Date (Print):September 1, 1976Publication History Published online1 May 2002Published i…