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ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMethods for calculating energy-level densitiesWendell ForstCite this: Chem. Rev. 1971, 71, 4, 339–356Publication Date (Print):August 1, 1971Publication History Published online1 May 2002Published inissue 1 August 1971https://pubs.acs.org/doi/10.1021/cr60272a001https://doi.or…
The temperature dependence of elastic constants c 11 – c 12 and c 44 of Fe 2.05 Ti 0.95 O 4.00 is measured by the ultrasonic pulse echo method, using a small (110) platelet with approximate dimension of 5×7×1.364mm, for the temperature range of 77°∼300°K. c 11 – c 12 decreases anomalously with decreasing temperature i…
Many of the classical problems involved in the mechanism of photoconductivity in chemically deposited PbS layers have been resolved by a combination of (a) materials control, (b) measurements of conductivity, photoconductivity, Hall effect, thermoelectric effect, and oxygen sorption, and (c) analysis of an inhomogeneo…
The conduction-band structure of In1−xGaxP has been studied by cathodoluminescence (CL) and photoluminescence (PL). An accurate determination of the direct energy gap (± 10 meV) as a function of alloy composition (Δx = ± 0.025) is achieved by the simultaneous electron probe microanalysis of alloy composition and spect…
The thermodynamic data for the lanthanide and actinide metals have been combined with spectroscopic data to develop a method of estimating the energies of the electronic configurations of the neutral gaseous atoms. Energies are tabulated for the lowest spectroscopic level of each configuration. Many of the odd terms o…
A microwave structure was built that is, essentially a scaled up model of a cholesteric liquid crystal. The model consists of a series of thin plastic sheets to which copper wires are attached of dimensions small compared to the microwave length. The direction of the wires on successive sheets varies in a screw-type f…
The thermal expansion of ammonium chloride has been measured in the neighborhood of the order-disorder transition near 242 \ifmmode^\circ\else\textdegree\fi{}K. At 1 atm, the transition is found to be first order with a hysteresis of 0.21 \ifmmode^\circ\else\textdegree\fi{}K. The measured thermal expansion shows sampl…
Abstract A new theory of deformation and strain induced crystallization of network polymers has been developed. The effects of lattice vacancies, variation in distribution of trans and gauche bond conformations in stretched amorphous polymers, and the crystallite orientation in the partially crystalline stretched vulc…
Abstract A thermodynamic theory of the elastic and dielectric properties of gadolinium molybdate is developed on the basis of a free energy expansion, which properly describes the space group symmetry change of gadolinium molybdate at 159 °C. The temperature dependence of the material constants is qualitatively explai…
HNN groups have appeared in several papers, e.g., [ 3; 4; 5; 6; 8 ]. In this paper we use the results in [ 6 ] to obtain a structure theorem for the subgroups of an HNN group and give several applications. We shall use the terminology and notation of [ 6 ]. In particular, if K is a group and { φ i } is a collection of…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTThe Stability of Fiber Drawing ProcessesD. GelderCite this: Ind. Eng. Chem. Fundamen. 1971, 10, 3, 534–535Publication Date (Print):August 1, 1971Publication History Published online1 May 2002Published inissue 1 August 1971https://pubs.acs.org/doi/10.1021/i160039a032https://d…
The phase diagrams of the systems PbBr 2 + MeBr (Me = L i , Na, K, Rb, Cs, Tl) have been measured by visual and DTA methods. The structures and the thermal characteristics of the intermediate compounds have been pointed out by X-ray diffractometric technique and by DTA-calorimetric measurements, respectively. Moreover…
Samples of kaolinite, illite, and montmorillonite were consolidated from slurries containing chemical dispersant and flocculating agents. The resulting microstructures of the six clays so produced have been studied in the scanning electron microscope, following a preliminary investigation of the problems of sample dis…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTProperties of triarylimidazolyl radicals and their dimersG. R. Coraor, L. A. Cescon, R. Dessauer, E. F. Silversmith, and E. J. UrbanCite this: J. Org. Chem. 1971, 36, 16, 2262–2267Publication Date (Print):August 1, 1971Publication History Published online1 May 2002Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolubility study of calcium hydrogen phosphate. Ion-pair formationJ. R. Sutter, Hershel McDowell, and Walter E. BrownCite this: Inorg. Chem. 1971, 10, 8, 1638–1643Publication Date (Print):August 1, 1971Publication History Published online1 May 2002Published inissue 1 August…
Optical second harmonic coefficients, refractive indices, and optical transmission of hexagonal SiC have been measured at room temperature. The nonlinear coefficients measured relative to quartz for a 1.064-μm fundamental are d15SiC=(25± 3)d11α −SiO2, d31SiC=(27± 3)d11α −SiO2, and d33SiC=(45± 5)d11α −SiO2. The observe…
Abstract The content of acrylic acid and acrylamide in their copolymers can be controlled by changing pH. The reactivity ratio of acrylic acid decreases with increasing pH, while the reactivity ratio of acrylamide increases with increasing pH. At low pH values, acrylamide is present in its protonated form which causes…
When Escherichia coli growing in minimal medium is shifted from 37 C to any temperature in the range 40 to 45 C, the growth rate immediately assumes a new, lower value, characteristic of that temperature. The decrease is shown to be due, in several strains, to decreased activity of the first enzyme of the methionine p…
Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Peer Review Share Icon Share Twitter Facebook Reddit LinkedIn Tools Icon Tools Reprints and Permissions Cite Icon Cite Search Site Citation J. Mo/lgaard, W. W. Smeltzer; Thermal Conductivity of Magnetite and Hematite. Journal of Applied…
Some experimental investigations have been made in order to understand the nature of phase transitions in the perovskite-type crystal CsPbCl 3 . Measurements of the birefringence and conoscopic observations confirm three phase transitions occurring at 37°C, 42°C and 47°C, respectively. The crystal system in each phase…