Materials Literature
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High pressure optical studies have been made on a series of crystalline therochromic and photochromic anils and model compounds. Measurements include absorption and emission peak locations and the integrated intensities of various absorption peaks including the uv peak and visible peaks introduced thermally or by irra…
Abstract For the solid state reactions in powdery state, two steps reaction was assumed, initial rapid surface reaction and later diffusion controlled reaction which obeys J ANDER'S kinetics after completion of the surface layer. In the case of much larger diffusion rate in the surface layer, the measured fraction of…
The phonon scattering by vibrating dislocation dipoles and the scattering by twin boundaries are discussed to explain the thermal conductivity of deformed crystals of bismuth and its dilute alloys. The scattering of phonons by vibrating dislocation dipoles was calculated by employing Ninomiya's formulae of eigenvibrat…
Les études magnétiques, par spectrométrie Mössbauer, par diffraction des neutrons et des rayons X sur les composés MM'P et MM'As ont mis en évidence un ordre très marqué des métaux de transition 3d et 4d, qui ne peut s'expliquer simplement que dans une description cristallochimique analogue à celle des oxydes. Les 4 f…
A simple approach to the alignment of short fibers moving in an air stream was explored, in which transverse air jets acted to alter main stream velocity and direction in a desired manner. An approximate analysis was developed for the effects of aerodynamic forces on fiber motion and was combined with a theory for the…
Abstract Die Schwingungsfrequenzen von Ba 2 ZnTeO 6 werden den ecken‐ und flächenverknüpften TeO 6 ‐Oktaedern zugeordnet. Beide Oktaedersorten unterscheiden sich in Kraftkonstanten, Bindungsordnung und TeO‐Abständen.
The physical properties of radiation- and sulfur-cured poly(butadiene–co–styrene)-based stocks were compared. It was found that the measured lower ultimate strength of radiation-cured stocks is in part attributable to the difference in the glass transition temperatures of the stocks cured by the two methods (an increa…
Phenyl methyl silicone fluids of low phenyl radical concentrations and low viscosities are characterized by their extraordinary gasabsorbing property in high electric fields. Their physical, chemical and electrical properties were investigated and compared with those of dimethyl silicone fluids. The corona resistant c…
The kinetics of growth of KDP crystals from aqueous solution has been examined at various supersaturations and temperatures, when stable supersaturated solutions have been injected with KDP seed crystals. The growth rate has been determined from measurements of the increase in the weight of a crystal. In the unagitate…
Dix (1976) recently has proposed that a “true experiment” be conducted to assess the validity of predictions of imminent violence. A random sample of persons predicted to be iminently violent would be denied emergency civil commitment in order to test whether they do, in fact, commit a violent act. This article analyz…
The mass-yield distribution of fission products following photofission of $^{232}\mathrm{Th}$ using peak bremsstrahlung energies of 9, 15, and 38 MeV were measured by $\ensuremath{\gamma}$ spectrometry for 25 mass chains in the light and heavy mass wings. Fission yields for mass chains 85, 87, 88, 138, and 146 were me…
Abstract Das System Ag 2 SeAg 2 S wurde mittels differential‐thermischer, Röntgen‐Phasen‐ und Mikrostrukturanalyse sowie Bestimmung der Dichte und der Mikrohärte untersucht. Es wurden Gleichgewichtsproben verwendet, die bei Temperung bei 200, 400 und 500° erhalten wurden. Das System Ag 2 SeAg 2 S ist ein polythermis…
Shear creep and creep recovery measurements were carried out on three low-density polyethylenes that were the object of extended investigations of the International Union of Pure and Applied Chemistry Working Party on the Structure and Properties of Commerical Polymers. The measurements were carried out in torsion at…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and characterization of the pentacoordinate mononitrosyliron complexes Fe(NO)[SCH2CH2N(CH3)(CH2)nN(CH3)CH2CH2S], n = 2,3Kenneth D. Karlin, Harold N. Rabinowitz, David L. Lewis, and Stephen J. LippardCite this: Inorg. Chem. 1977, 16, 12, 3262–3267Publication Date (P…
Abstract An experimental approach has been made to investigate and characterize the alignment of short fibers contained in a suspension, during flow of the suspension through a convergent channel. Flow patterns have been obtained and analyzed for suspensions of various fiber concentrations. The influence of parameters…
This work deals with uniaxial orientation and shrinkage of two grades of well-characterized low-density polyethylene (LDPE), and a general-purpose polystyrene (PS). The LDPE grades differed in molecular-weight distribution and degree of long chain branching. The polymer samples were stretched to different levels of de…
The crystal structure, magnetic transition point and saturation magnetic moment were determined for (Fe 1- x M x ) 3 P compounds with M=Cr, Mn, Co, Ni. X-ray examination identified all the compounds as b.c.t., except Mn compounds with 0.3< x <0.7 which were found to be orthorhombic. Co compounds with x >0.3 could not…
Dimethyl ether was pyrolyzed in a flow system at 10 to 80 Torr and 1005 K. The average concentration of CH 3 radicals in the reactor was measured by ultraviolet absorption spectroscopy. Product yields were measured by gas chromatography. The system was simulated using a computer program, taking into account the warm-u…
High voltage (500 kV) scanning transmission electron microscopy (STEM) has been applied for the first time to the observation of thinned silicon transistors of commercial type by using the transmission and conductive (electron-beam-induced conductivity) imaging modes. A high resolution image of crystal defects is obta…
Abstract Polyethylene was spun into a heated chamber, with the spin‐line temperature controlled in the range of 90–120°C. Within narrow limits, the stretch rate of the fiber was also controlled. Spin‐line and crystallization onset conditions were characterized. Characteristics of fibers as‐spun were measured via wide‐…