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。
SUMMARY: The effectiveness of a number of different materials in the negative staning method for electron microscopy of viruses is evaluated. Shadowing was used to study the degree of distortion suffered by the specimen. Changes in pH value which occurred while the negative staining solution was trying were measured i…
The dispersion relation for the longitudinal acoustic lattice waves propagating in the direction of the hexad axis in (pyrolitic) graphite, at room temperature, has been determined by neutron spectrometry. The dispersion curve has very closely the form of a sine curve, with a maximum frequency of (3.84\ifmmode\pm\else…
Abstract This is a review of silicone rubber and challenging it is since the silicones, a relatively new group of completely synthetic materials, are growing very rapidly even when viewed against today's rapidly advancing technology. The silicones bring together something of the properties of inorganic materials with…
This paper is concerned with an investigation of the electrical,the galvanomagnetic, and the thermoelectric properties of pyrolytic graphites whose morphological features are conditioned by the deposition temperature, the heat treatment, and the doping level. (1) Basal-plane magnetoresistance and c-direction specific…
Isothermal sections at 600°, 650°, 700°, 750°, and 800° C, run for the most part at 15 kilobars total pressure, were obtained using a squeezer-type apparatus. Above approximately 675° C. the system contains two two-phase and two single-phase areas. One single phase region extends a short distance into the ternary syst…
By slow removal of CO2 from Ca(HCO3)2 solution containing MgCl2 at room temperature, pure and homogeneous aragonite crystals were obtained. During the crystal syntheses, labeling with either or both C14 and Ca45 was feasible.
The phase equilibrium diagram for the binary system bismuth sesquioxide-niobium pentoxide has been constructed from observations of fusion characteristics and X-ray diffraction data. In the system five binary compounds were observed with Bi(2)O(3):Nb(2)O(5) ratios of 5:3, 1:1, 4:9, 1:5, and 1:6. The 1:1 compound was f…
Abstract The nonohmic behavior of carbon black‐loaded natural rubber viilcanizates was studied. Three samples contained high‐abrasion furnace black (HAF) in good, moderate, and poor dispersion. Another sample contained a good dispersion of medium thermal black (MT). The nonohmic behavior of the poor HAF dispersion and…
Abstract A variety of metastable conditions can be produced in polypropylene of normal commercial tacticity by quenching, cold drawing, and annealing. The resultant x‐ray patterns suggest a two‐component three‐phase model of the molecular organization, and such a model has suffcient scope to produce good agreement bet…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallographic Data for New Rare Earth Borate Compounds, RX3(BO3)4A. D. MillsCite this: Inorg. Chem. 1962, 1, 4, 960–961Publication Date (Print):November 1, 1962Publication History Published online1 May 2002Published inissue 1 November 1962https://pubs.acs.org/doi/10.1021/…
The adsorbed surface species which result when aluminum oxide is exposed to methanol or ethanol vapor have been studied. Three different surface species have been identified for both methanol and ethanol. At 35°C a weakly bound layer of liquid alcohol is observed, which is removed by evacuation. Another species which…
Expressions have been derived for the optical birefringence and elastic moduli of an idealized semicrystalline polymer in terms of the molecular orientation. The predicted birefringence and moduli show qualitative agreement with previous experimental data for polyethylene at low extension ratios. A result of particula…
"Applied Clay Mineralogy." Geologiska Föreningen i Stockholm Förhandlingar, 84(4), p. 533
Abstract Equations are given for estimating equivalent isothermal life from thermogravimetric data and for estimating the apparent activation energy for volatilization even though the nature of the kinetic process is unknown. Illustrative data for polytetrafluoroethylene are presented. The importance of using sample t…
An x-ray diffraction study of the crystal structure of Cu2B10H10 shows that the earlier proposal that the B10H10—2 ion has D4d symmetry is correct, and further establishes the covalent nature of the interactions of CuI with B atoms forming the edges of the polyhedron. There are eight Cu2B10H10 in a unit cell having di…
(I) The requirements for making a critical test of whether two- or three-dimensional surface nucleation controls the radial growth of lamellar spherulites in bulk are discussed. Radial-growth-rate data were obtained on spherulites of polychlorotrifluroethylene (PCTFE) for a wide range of supercooling ΔT, and found to…
The effects of different fluxing ingredients on melting characteristics, thermal expansion, DC resistivity and dielectric properties of the glass compositions, MgO 10, CaO 10, Al2O3 19, SiO2 61% and MgO 18, Al2O3 19, SiO2, 63% were studied. Li2O is the strongest fluxing ingredient but it increased expansivity and diel…
The Hall coefficient of alloys of up to 5% Ni, Co, Fe, and Mn in Au has been measured from 4.2°K to room temperature. The Hall coefficients are strongly temperature dependent in these alloys and have been fitted to an equation of the form R=R0+R1χ, where R0 is close to the value for the Hall coefficient of pure Au, an…
Basic domain structures of epitaxially grown single-crystal thin films of iron are investigated by the powder pattern technique. For films with (001) orientation, where two easy axes of magnetization lie within the plane of the film, a checkerboard pattern, i.e., a regular square domain pattern made up of 90° walls on…
Abstract Es wurde die Kinetik der CaCO 3 ‐Bildung aus dem Oxyd unter verschiedenen CO 2 ‐Drucken untersucht und gefunden, daß die Geschwindigkeit der CO 2 ‐Aufnahme bei Temperaturen über 800 °C durch die druck‐abhängige Keimbildung und den ebenfalls druckabhängigen Wachstumsprozeß bestimmt wird. Bei 800 °C und Drucken…