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 energy loss for protons on Al, Cu, and Ag thin foils around the maximum of the stopping have been measured at two different exit angles. The bombardment energy ${E}_{\mathrm{max}}$ where such a maximum occurs is found to depend on the angle of observation, ${E}_{\mathrm{max}}$ being greater when the detector is po…
The reflection and transmission of thin-film guided waves incident at variable angles upon a variety of transverse discontinuities are analyzed. A thin film bounded by semi-infinite media is modeled by a thin film bounded by finite media, terminated at shorting planes situated parallel to and a long distance from the…
Five (2,2-dimethylchroman-6-yl)alkanoic acids were synthesized and tested for antigelling activities. It was envisioned that these agents might bind via hydrophobic bonding to nonpolar sites of the "donor-acceptor" regions of hemoglobin S. Several (2,2-dimethylchroman-6-yl)alkanoic acids containing 1-4 carbon atoms on…
Abstract Deeply weathered soils forming on andesitic mudflows are common in the foothills of the Sierra Nevada of California. Many of these soils (Humults) have oxidic mineralogy based on extractable Fe and gibbsite detected by x‐ray diffraction and differential thermal analysis. Thermal analysis and differential ther…
Forces required by complete dentures for penetrating some commonly used food items were measured experimentally. These forces were compared with the maximal bite forces of twenty-seven complete denture wearers. Food items that required the greatest forces in direct closure were rye bread (167 N), raw carrot (118 N), b…
In order to obtain accurate film thickness measurements using various spectroscopic reflection techniques, it is necessary to have accurate refractive index measurements over the spectral range. A simplified representation of the dispersion of many of the films and materials used in the manufacture of semiconductor de…
Abstract The ordered phase of Tris(hydroxymethyl)aminomethane can be described in terms of molecular layers with intermediate intralayer and weak interlayer hydrogen bonds. The results of a normal coordinate treatment prove the strong coupling of the OH and NH deformation modes with other internal vibrations. Except f…
The combined effect of water and oxygen on stress corrosion cracking (SCC) of carbon-manganese steel in liquid and vaporous ammonia has been studied in detail. The highest susceptibility to SCC was found in liquid ammonia with 3 to 10 ppm oxygen and a water content lower than 100 ppm. SCC can occur in ammonia with an…
The past 15 years have seen major advances in the development of ceramic tool materials to give high cutting speeds and long tool lifetimes. These developments require rigid machine tools and high-power motors, and a change in the way the tool tips are used. The main areas of application of these new tool materials ar…
A homologous series of methacrylate side-chain liquid crystalline (LC) homopolymers and copolymers was studied in solution by several techniques. The molecular weight distributions and some hydrodynamic and thermodynamic parameters were calculated. A decrease in the dn/dc values of the copolymers compared to those of…
By 205 Tl and 207 Pb NM R the chemical shift in polycrystalline samples of binary halides AX, BX 2 and ternary halides ABX 3 (A = Cs, Tl; B = Pb; X = Br, I) was studied at room temperature. The chemical shift tensors δ ( 205 Tl) and δ ( 207 Pb) were determined in magnitude and orientation on single crystals of the ort…
A two layer model for water flux through the artery is studied using a mathematical model based on the theory for the consolidation of water saturated soils. The matrix is considered to be constituted by two layers with different permeabilities and different elastic constants and the two systems of equations are coupl…
A recently proposed model for interstellar grains (Duley, Jones & Williams) in which the extinction arises from small (radius, a≲ 100 Å) silicate cores with mantles (30–50 Å thick) of hydrogenated amorphous carbon (HAC or α-C:H), and large, but thinly coated, silicate grains (a∼0.05−0.25 μm) can successfully explain m…
Silicon carbide test bars were made by a simple wet‐processing technique. The pressure casting method used the same equipment as conventional dry‐pressing, but with a modified die. This casting technique was employed in order to produce test bars with improved strength and smaller fracture flaws than produced by dry‐p…
An electrochemically formed polyazulene(PAz), one of the electroconductive polycyclic hydrocarbons, was studied for its electrochemical properties in order to examine the possibility of utilizing it as a cathode active material of rechargeable lithium battery. The electrode kinetics of PAz film electrode, especially t…
Waste and scraps, from polyurethane elastomers, mainly from the shoe sole production, can be conveniently converted by a transesterification process into polyols which can be reused in the production of rigid foams, with both economical and ecological advantages. In the transesterification process, secondary reactions…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAdsorption of boron on molybdenum(100) and its effect on chemisorption of carbon monoxide, ethene, propene, and 3,3,3-trifluoropropeneT. B. Fryberger, J. L. Grant, and P. C. StairCite this: Langmuir 1987, 3, 6, 1015–1025Publication Date (Print):November 1, 1987Publication Hi…
Abstract Die bisher nur aus Pulverdaten bekannten Strukturen der Verbindungen FeAs 2 (Löllingit) und RuTe 2 (Pyrit) wurden anhand von Einkristalldaten neu bestimmt. Die Darstellung der FeAs 2 ‐Einkristalle (Kantenlänge bis zu 6 mm) erfolgte durch Gasphasentransport mit Iod, die Einkristalle des RuTe 2 wurden aus einer…
Methods of surface preparation of steel for adhesive bonding are reviewed. With advanced adhesives, joints of unprepared oily steel can prove very strong, but for durability in adverse environments one must remove all contamination and provide a new, chemically active surface of high surface energy. Degreasing, organi…
Abstract Results are reported of optical transmission experiments on the spinel NiAl 2 O 4 that have been made at temperatures up to 1400°C. The spectra are discussed, and analyzed in relation to the temperature dependence of the distribution of cations on the two cation sublattices. The kinetics of cation sublattice…