Materials Literature
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The lowest-energy state of the incommensurate charge density wave (CDW) near the lock-in transition is found to be a distorted plane wave. An exact solution is found in the weak-coupling limit and the lock-in phase transition is continuous. A new defect is found in the commensurate CDW, a discommensuration, in which t…
We have measured the melting temperatures of crystallized suspensions of polystyrene spheres as a function of concentration. By analyzing the data on the basis of a simple model we can estimate the heat of melting and the entropy change.
The Compton scattering of circularly polarized $\ensuremath{\gamma}$ rays was used for studying the linear momentum distribution of electrons with unpaired spins in ferromagnetic iron metal. The observed Compton profile shows a broad minimum around zero momentum. The results are discussed in comparison with those calc…
The resolution and field of view attainable in electron microscopes is limited by third-order aberrations of the optical system. While considerable effort has been made to determine the effects of these aberrations on the CTEM, little work has been done for the case of the STEM, We have found that one of the advantage…
Report describes effectiveness and materials compatibility of amine nitrites. Particularly of value to those interested in long-term corrosion protection.
A STEM which includes a corrector for primary spherical aberration has been built and is being put into1operation. The microscope is expected to achieve a resolution of 1 Å at 50 keV. This high resolution is possible because of the correction of spherical aberration. The corrector and its operation have been described…
Abstract Exciton fine structure is measured in hexagonal AgI by two‐photon absorption. A detailed assignment of the different P‐exciton states is possible using the appropriate polarization configurations. The experimental results can be explained quantitatively taking into account anisotropy as the only perturbation…
Thirteen alpha, omega-alkanedicarboxylic acids (C2-C12, C14, and C16) and their dimethyl esters were tested against Aspergillus niger, Trichoderma viride, and Myrothecium verrucaria in Sabourauc dextrose agar at pH 4.0 AND 5.6. Toxicity to Canadida albicans, Trichophyton mentagrophytes, and Mucor mucedo was determined…
The motion and location of the molten clad during an unprotected loss-of-flow accident in liquid-metal fast breeder reactors are very important because of their effect on the reactivity and the subsequent fuel motion. The present study analyzes the clad relocation problem based on a single-channel film flow model and…
Abstract Enthalpies of formation h 1 of Ge Te alloys were measured by direct reaction calorimetry in the temperature range 1030 < T /K < 1150 and at mole fractions 0.25 < x Ge < 1. The measurements were performed with a high temperature ( T /K < 1400) Tian‐Calvet calorimeter. When referred to liquid te…
Abstract The absorption and reflection coefficients of GeSe single crystals are measured at various temperatures in the spectral range 0.8 to 2.2 μm using linearly polarised light. The main absorption mechanism is due to indirect interband electronic transitions with participation of two different phonons. Indirect en…
An atomic oxygen beam and mass spectrometer were used to measure the oxygen atom reflection γ16, recombination γ32, general surface reaction γM, and occlusion γ0 probabilities on six different engineering surfaces as a function of atomic oxygen exposure. The materials studied include gold, Nichrome V, aluminum, titani…
Summary Twenty experiments between 1970 and 1974 tested the effect of spring applications of all combinations of five amounts of potassium (0–333 kg K/ha) and two amounts of sodium (0, 150 kg Na/ha) on sugar-beet yield, profitability and the amount of K and Na in the crop in mid-summer. The experiments were in commerc…
Abstract Data on the solubility and diffusion of vinyl chloride monomer (VCM) in PVC resin powders have been combined with published solutions of Fick's diffusion equation to yield predictions of the amount and rate of loss of residual VCM (RVCM) from rigid PVC pipe under storage and service conditions. The principal…
The solubilities and diffusion coefficients of H2 in liquid Li contained in cylinders of Nb and Nb/1%Zr were determined in the temperature range 625–905°C and pressure range 13–1333 Pa. Simultaneous radial and axial diffusion into a finite solid cylinder adequately described the transport of H2 into liquid Li. The dif…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTMagnetic properties of some electrically conducting perylene-metal dithiolate complexesLuis Alcacer and August H. MakiCite this: J. Phys. Chem. 1976, 80, 17, 1912–1916Publication Date (Print):August 1, 1976Publication History Published online1 May 2002Published inissue 1 Aug…
Abstract The crystallization of bisphenol‐A polycarbonate plasticized by trimellitic acid tridecyloctyl ester (Morflex 525) has been studied. A half‐crystallization time of 100 min is observed at 170°C with 10% of plasticizer compared with a figure of 18,000 min for the unplasticized material. The kinetic study is lim…
Abstract The hydrothermal aging of pure silica—alumina gels in presence of 10 ml of 0.1 N sodium hydroxide solution at 175, 150 and 130°C for 8–30 days led to the synthesis of zeolites and the phyllosilicates, beidellite and kaolinite. The solution was neutralized by a partial hydrolysis of the gel which readily reorg…
Bismuth enters into the alkali halide lattice in its trivalent and/or divalent state if it is introduced by diffusion of bismuth vapors at appropriate temperatures. In its trivalent state its ground state is $^{1}S_{0}$ and transitions from this level to the $^{3}P_{1}$, $^{3}P_{2}$, and $^{1}P_{1}$ states are the wel…
The Fujita-Ban model and the classical Free-Wilson model are shown to be linearly related: the de novo group contributions obtained by one model are linear transformations of those obtained by the other model. An example is given to illustrate this linear dependence. The Fujita-Ban model is characterized by a number o…