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。
The new ternary compounds NaAlSe 2 , NaAlTe 2 , NaGaTe 2 and KAlTe 2 crystallize in the Tl I Tl III Se 2 -structure type. The analogous Tl-compounds build up the same structure but show a variable composition within the limits (Na x Tl 1-x )TlSe 2 (0 < x < 0.47) and (K x Tl 1-x )TlSe 2 (0 < x &…
Correlations of experimental data on heat transfer from nonboiling, horizontal fluid layers with internal heat generation have been cast into a form suitable for analysis of postaccident heat removal in fast reactors. Available data on layers with equal boundary temperatures indicate that the downward heat transfer ra…
Abstract Glauconite pellets in the Cambrian of the central U.S.A. frequently contain two textural forms of glauconite–aggregate and oriented—which differ in both mineralogy and chemistry. The aggregate glauconite composes the bulk of most pellets and consists of crystals in a nearly random arrangement. The oriented gl…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe structure of chetominA. G. McInnes, A. Taylor, and J. A. WalterCite this: J. Am. Chem. Soc. 1976, 98, 21, 6741Publication Date (Print):October 1, 1976Publication History Published online1 May 2002Published inissue 1 October 1976https://pubs.acs.org/doi/10.1021/ja00437a07…
High-efficiency silicon solar cells have been reported that use a surface alteration to reduce reflection. The process here reported purposely alters the cell surface with an anistropic etching in ternary mixtures of KOH, H2O, and ethyl glycol. Wafers were "sensitized" with a carbon compound to insure etching uniformi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDynamics and thermodynamics of axial ligation in metalloporphyrins. 5. Affinity of ferric porphyrins for nitrogenous bases and the stoichiometry and spin states of the product complexesJames D. Satterlee, Gerd N. La Mar, and James S. FryeCite this: J. Am. Chem. Soc. 1976, 98…
The theory of the longitudinal vibrations of a composite ’’crystalline-amorphous’’ elastic rod with perturbing forces at the ends has been developed. The longitudinal-acoustic-mode fundamental frequencies are tabulated as a function of the relative elastic moduli, relative densities, and relative composition of the co…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular stereochemistry of a nitrogen-bridged metalloporphyrin: .mu.-nitrido-bis[.alpha.,.beta.,.gamma.,.delta.-tetraphenylporphinatoiron]W. Robert Scheidt, David A. Summerville, and Irwin A. CohenCite this: J. Am. Chem. Soc. 1976, 98, 21, 6623–6628Publication Date (Print)…
The angle between the nematic director and an aligning surface in contact with a nematic phase is of importance in defining the mechanism of surface alignment of liquid crystals. A new and simple optical method of determining this tilt angle is described, and measurements are reported on a number of homologues of the…
Thermal-expansion measurements were made for five varieties of mixed-alkali silicate glasses (Na-K, Na-Rb, Na-Cs, K-Rb, and K-Cs), with special emphasis on the Na-K silicates. Negative deviations from additivity were observed in the glass transformation temperature in every case, with the deviations increasing with to…
Charging and discharging current transients in polypropylene films were measured over a wide range of temperatures and electric fields. Some limited studies of the behaviour of these current transients were also made with different electrode materials and sample thicknesses. The experimental evidence suggests that the…
The trace of the force-dipole tensor (A+2B) as well as the components A and B of hydrogen interstitials in niobium were determined from measurements of the lattice parameters of the alpha , alpha ' and beta phases. It is shown that the orthorhombic structure of the beta phase is due to a direct hydrogen-hydrogen inter…
Abstract ABS systems which differ distinctly in particle size and degree of grafting were prepared and investigated by dynamic mechanical measurements as function of temperature in the glass transition region of the rubber phase. Variation of rubber content within different sample series results in effects which were…
Using the method of small-angle x-ray scattering (SAXS), the time-dependent structural changes in some linear-segmented urethanes have been investigated. The results directly support the time- and temprature-dependent morphological model proposed earlier by one of the authors. Specifically, upon heating of many linear…
1. Fractionation of fibroin prepared from the posterior silk glands of Bombyx mori was carried out. After carboxymethylation of the fibroin, it was fractionated by ammonium sulfate precipitation, Sephadex G-200 gel filtration and DEAE-cellulose column chromatography. 2. The fibroin was composed of at least two protein…
The most successful techniques for producing graphite-aluminum com posites have been those that utilize liquid-metal infiltration of graphite yarn. Almost all grades and types of graphite yarn can be infiltrated; how ever, a fiber coating is required, which results in wetting and provides a diffusion barrier to inhibi…
Machine learning (ML) is transforming all areas of science. The complex and time-consuming calculations in molecular simulations are particularly suitable for an ML revolution and have already been profoundly affected by the application of existing ML ...Read More
"Optical Properties of Solids-New Developments." Optica Acta: International Journal of Optics, 23(10), pp. 841–842
The Sondheimer oscillations in the electrical resistivity and the Hall coefficient have been measured in copper single crystals. The magnetic field was oriented to the [100] and close to the [110] directions, and it is shown that in these cases the oscillations are interpreted as the type 2 according to the theory of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXT[Mo3(OAc)6(CH3CH2O)2(H2O)3]2+ and other new products of the reaction between molybdenum hexacarbonyl and acetic acidA. Bino, M. Ardon, I. Maor, M. Kaftory, and Z. DoriCite this: J. Am. Chem. Soc. 1976, 98, 22, 7093–7095Publication Date (Print):October 1, 1976Publication Hist…