Materials Literature
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Analysis of recently published X-ray and neutron diffraction data for LiOH reveals that there are pronounced non-spherical deformations of the electrondensity about the oxygen pseudo-atom. Comparison with a theoretical calculation of the electron density for the isolated hydroxide ion shows that these deformations are…
The morphological, cultural, physiological, and biochemical characteristics of a new actinomycete are described. The organism is distinctive because of the absence of aerial mycelium and the presence of glycine and LL-diaminopimelic acid in its cell wall. The mycelium bore numerous round-to-pyriform sporangia, each of…
The relaxed (110) surface electronic structure of GaAs is calculated within the tight-binding model. The symmetry and dispersion of the surface states are compared to those measured by angle-resolved photoemission experiments. Variations in photoemission intensity with measurement geometry are related to matrix-elemen…
Reflection spectra have been measured in the far infrared region (10 cm -1 –500 cm -1 ) for several kinds of crystals of transition-metal dichalcogenides (TX 2 ). Optical phonon frequencies of infrared active mode ( E ⊥ c ) are determined for the group IV compounds HfSe 2 , ZrSe 2 and TiSe 2 and for the group VI compo…
The effect of nickel and manganese addition on the ductility and magnetic properties of 6.5% silicon-iron sheet has been studied. Ductility was studied by tensile tests and cold-rolling under various conditions. It was found that the nickel addition did not improve the cold-workability of the alloys. Alloys with 0.10-…
Alloy characteristics that relate directly to wear resistance are much sought after, but elusive. Attempts have been made to correlate wear resistance with mechanical and physical properties, including hardness, but only with limited success. During the course of this investigation, cast, wrought, and hard facing wear…
Isocitrate lyase was isolated in homogeneous state from a thermophilic Bacillus. The enzyme has a mol.wt. of 180000 and a pI of 4.5 and contains threonine as the N-terminal residue. It resembles in size the cognate enzyme from the mesophilic bacterium Pseudomonas indigofera, but is smaller than the enzyme from the euk…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProcess Variable Effects in the Conversion of Methanol to Gasoline in a Fluid Bed ReactorDavid Liederman, Solomon M. Jacob, Sterling E. Voltz, and John J. WiseCite this: Ind. Eng. Chem. Process Des. Dev. 1978, 17, 3, 340–346Publication Date (Print):July 1, 1978Publication Hi…
The RISM equation is used to study the local structure of acetonitrile. The theoretical calculations predict neutron and X-ray scattering structure factors that are in good agreement with experiment. The following conclusions are drawn from this study. (1) Dipole-dipole interactions play, at most, a minor role in form…
Room-temperature continuous operation (cw, 300 °K) of photopumped AlxGa1−xAs-GaAs-AlxGa1−xAs quantum-well heterostructure lasers embedded in Cu under diamond windows is demonstrated. The quantum-well heterostructures are grown by metalorganic chemical vapor deposition (MO-CVD) and possess undoped (nd−na≲1015/cm3) or c…
In systems with pronounced resonance conditions and a low degree of damping, temporary overvoltages may develop when transformers are switched in or at fault clearing. Overvoltages can occur e.g. in generator networks feeding HVDC stations and in high voltage cable systems.
Abstract Thermodynamic parameters derived from experimental results were determined for the potassium‐calcium and magnesium‐calcium exchange reactions on a kaolinitic soil clay separated from the B horizon of a strongly weathered soil profile. The clay samples were equilibrated at 10° and 30°C with a mixed solution of…
The relationship between the total loss under tensile stress and the tilt angle of the [001] out of crystal surface β was studied in 3 percent Si-Fe single crystals. The total loss largely depends upon β. When β is about 2°, the total loss under tensile stress is the smallest, and the decrease of the total loss due to…
The effects of 20 oxide dopants on the microstructure development of Mn‐Zn ferrite during sintering were investigated by diffusion‐couple‐like experiments. Nine oxides enhanced grain growth in ferrite; the effects of TiO 2 dopant were studied in detail. The TiO 2 ‐induced exaggerated grain growth shows a parabolic tim…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNature of naked-metal-cluster polyanions in solution. Evidence for (Sn9-xPbx)4-(x = 0-9) and tin-antimony clustersR. W. Rudolph, W. L. Wilson, F. Parker, R. Craig Taylor, and D. C. YoungCite this: J. Am. Chem. Soc. 1978, 100, 14, 4629–4630Publication Date (Print):July 1, 197…
Abstract The pressure–volume–temperature (PVT) properties of a commercial polysulfone derived from bisphenol A and 4,4′‐dichlorodiphenylsulfone are studied experimentally and theoretically in the temperature range 30–370°C and for pressures to 2000 kg/cm 2 . PVT surfaces are determined for an annealed glass, formed un…
The inherent texture and unique Burgers vector in h.e.p. zircaloy tubing should confer anisotropic creep properties on the material. The results of an experiment designed to measure the anisotropy of irradiation creep using pressurized tubes are analysed in terms of a texture-dependent model based on glide. The predom…
Zinc chloride glass is a potentially useful medium for ultralow-loss (∼1 dB/103 km) optical fibers for wavelengths in the 3.5–4-μm region. In this region, intrinsic absorption, scatter, and material dispersion are all expected to be small, and the common fully oxidized transition metal impurities and H2O should exhibi…
Solid-state physicists are turning more and more to complex synthetic materials in their search for novel phenomena and potentially useful properties. Many of these materials are highly anisotropic, so that interatomic interactions can for all practical purposes be neglected along one or two crystal axes. One of the o…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThermodynamics of Polymer CompatibilityDonald Patterson and Andrée RobardCite this: Macromolecules 1978, 11, 4, 690–695Publication Date (Print):July 1, 1978Publication History Published online1 May 2002Published inissue 1 July 1978https://pubs.acs.org/doi/10.1021/ma60064a015…