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 The early studies of chain scission in the oxidation of rubber by Dr. E. M. Bevilacqua, and his subsequent work on the identification of the various acids, methyl ketones, and other volatile products of the oxidation reaction, have contributed much to our present knowledge of the nature of the processes invol…
The magnetic properties of the rare-earth metals and a number of the alloy and compound systems formed with rare earths are discussed. Emphasis is placed on current experimental results of bulk magnetic measurements and related transport phenomena and their bearing on theoretical studies. Topics covered include exchan…
Single crystals of Cr 3 Te 4 with the pseudo-NiAs type structure have been made by chemical transport method in order to investigate the anomaly below 80 K. The saturation moment at 4.2 K is equal to 1.79±0.03 µ B per Cr 1- x Te (x=0.25), and the Curie temperature is 316 K. The magnetization only in the direction to t…
Application of an electric field to a thin layer of nematic liquid-crystal causes the formation of a lattice of cylindrical lenses within the liquid-crystal material. An expression for the far-field diffraction pattern of light transmitted through this lattice is derived. The observed diffraction pattern agrees with t…
Spatially uniform birefringences tunable over the range 0. 0–0. 15 for applied voltages less than 20 V rms and with a sharp threshold below 4 V rms are obtained for thin layers of nematic liquid crystals with negative dielectric anisotropy. The achievement of spatially uniform tunable birefringence with negative-diele…
It is shown from measurements of the resistivity ratio (RR ≡ resistivity at room temperature divided by resistivity at 10°K), superconducting transition temperature, and transition-temperature width that high-quality single-crystal niobium films can be fabricated by rf sputtering. The observed dependence of RR on samp…
The effect on the interfacial gravity wave between two fluids is studied when there is a temperature gradient in the fluids. It is found that the thermal effect is closely related to the phase transformation across the interface. The interfacial conditions with mass flow are first derived. Then the dispersion relation…
Summary The adsorption of silicate and phosphate from pure and mixed solutions by four soils known to fix phosphate strongly has been measured. The adsorption at constant pH for each acid from its pure solution follows the Langmuir isotherm. The maximum adsorption of silicate by three of the soils from the pure soluti…
The scattering of x rays from noncrystalline samples of BeF2 and SiO2 at 25°C has been measured and analyzed. The diffraction patterns, typical of the atomic arrangement found in liquids, show interference to values of the scattering variable s=16 and beyond. The glasses contain BeF4 (SiO4) tetrahedra joined at the co…
Dielectric specimens in the shape of a frustum of a cone were evaluated for surface flashover strength in vacuum of 10-5 torr. Data were obtained for positive and negative pulses of several hundred kilovolts amplitude and with rise times in the nanosecond and microsecond region. The results indicate that most material…
I - Absorption of Finite-Amplitude Waves.- II - Acoustic Radiation Pressure.- III - Acoustic Streaming.- IV - Pulsations of Cavitation Voids.- V - Experimental Investigations of Ultrasonic Cavitation.- VI - The Cavitation Zone.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNitrogen-hydrogen tautomerism in porphyrines and chlorinesC. B. Storm and Y. TekluCite this: J. Am. Chem. Soc. 1972, 94, 5, 1745–1747Publication Date (Print):March 1, 1972Publication History Published online1 May 2002Published inissue 1 March 1972https://pubs.acs.org/doi/10.…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNovel antiferromagnetic oxo-bridged manganese complexP. M. Plaksin, R. C. Stoufer, M. Mathew, and G. J. PalenikCite this: J. Am. Chem. Soc. 1972, 94, 6, 2121–2122Publication Date (Print):March 1, 1972Publication History Published online1 May 2002Published inissue 1 March 197…
Abstract Calcite phases with different amounts of ferrous iron (determined by microprobe analysis) are distinguishable by study of stained thin sections and stained acetate peels. We have defined four such phases, they are (a) non-ferroan calcite (0.0% FeO; red stain), (h) ferroan calcite I (0.5% to 1.5% FeO; red-purp…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStereochemistry of low-spin iron porphyrins. I. Bis(imidazole).alpha.,.beta.,.gamma.,.delta.-tetraphenylporphinatoiron(III) chlorideD. M. Collins, R. Countryman, and J. L. HoardCite this: J. Am. Chem. Soc. 1972, 94, 6, 2066–2072Publication Date (Print):March 1, 1972Publicati…
An analysis of infrared conversion to visible and ultraviolet radiation by Yb3+–Er3+, Yb3+–Ho3+, and Yb3+–Tm3+ ions in crystals is presented. The expression for the visible power output in the presence of back transfer from the active ion to the energy-transferring ion (Yb3+) is given and the relationship between the…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMolecular Weight Dependence of the Crystallization Kinetics of Linear Polyethylene. I. Experimental ResultsE. Ergoz, J. G. Fatou, and L. MandelkernCite this: Macromolecules 1972, 5, 2, 147–157Publication Date (Print):March 1, 1972Publication History Published online1 May 200…
Not available
Not available
Not available