Takashi Sawaguchi、Kazumasa Suzuki、Takeshi Kuroki 等 4 位作者1981-04-01Journal of Applied Polymer Science
Abstract The kinetic equation for the pyrolysis gasification reaction of isotactic and atactic polypropylenes has been established. The difference in tacticity of the samples does not much affect the kinetic parameters. The exponent a of the intensity function I F = T δ a (K·sec a ), concerning the severity of decompo…
Thermochemical Biomass Conversion ProcessesPolymer crystallization and propertiesThermal and Kinetic Analysis
Ichiro Hatta、Takao Nakayama1981-04-01Molecular crystals and liquid crystals
A hyperscaling relation v″ + 2v┴ = 2 – α is examined for the nematic to smectic A transition of 4-octyloxy-4′-cyanobiphenyl (8OCB) and 4-octyl-4′-cyanobiphenyl (8CB). From the heat capacity results, 2-α is analyzed to be 1.84 ± 0.03 for 8OCB and 1.75 ± 0.02 for 8OCB. On the other hand v″ + 2v┴ is calculated from the r…
Liquid Crystal Research AdvancementsPhotochemistry and Electron Transfer StudiesMolecular spectroscopy and chirality
Leszek Sowul、M. Epstein1981-04-01Industrial & Engineering Chemistry Process Design and Development
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystallization kinetics of sucrose in a CMSMPR evaporative crystallizerLeszek Sowul and Mary Anne Farrell EpsteinCite this: Ind. Eng. Chem. Process Des. Dev. 1981, 20, 2, 197–203Publication Date (Print):April 1, 1981Publication History Published online1 May 2002Published in…
Crystallization and Solubility StudiesFreezing and Crystallization Processes
E. Husain、R.S. Nema1981-04-01IEEE Transactions on Electrical Insulation
An investigation of power frequency (50 Hz) surface partial discharges in dry air, using 21r/3 Rogowski profile electrodes in the low pressure range of 0.067 to 91.333 kPa, shows that for the discharges occurring symmetrically around the electrodes and just outside the uniform field region, the breakdown voltages are…
High voltage insulation and dielectric phenomenaPlasma Diagnostics and ApplicationsAerosol Filtration and Electrostatic Precipitation
Masasi Inoue、Hisato Oshima、Motoji Morisaki 等 6 位作者1981-04-01Journal of the Physical Society of Japan
Magnetization measurements have been carried out to study various types of magnetism in degenerate magnetic semiconductors Sn 1- x (Me) x Te with different 3d transition metals Me=Cr, Fe, Co, and Ni. Of these impurities with x =1 at.%, only Cr and Fe act as ferromagnetic centers, while Co and Ni are magnetically ineff…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsHeusler alloys: electronic and magnetic properties
Shunsuke Uchida、Masao Kitamura、Yasunori Matsushima 等 6 位作者1981-04-01Nuclear Science and Engineering
The characterization of radioactive corrosion products deposited on the internal surfaces of recirculation pipes was carried out to determine the deposited amounts and configurations. The test specimens were taken from the auxiliary pipes of the recirculation lines of Shimane Nuclear Power Plant after operation for ∼2…
Nuclear Materials and PropertiesGraphite, nuclear technology, radiation studiesNuclear and radioactivity studies
Ken‐ichi Machida、Gin‐ya Adachi、H. Hata 等 4 位作者1981-04-01Bulletin of the Chemical Society of Japan
Abstract The europium(II) orthoborate Eu3(BO3)2 is trigonal, space group R\bar3c, with a=9.069(1), c=12.542(2) Å and Z=6. The structure has been refined to R=0.082 for 259 observed reflections with isotropic thermal parameters. The borate contains isolated and planar triangle BO33− ions, the anions and Eu atoms being…
Magnetism in coordination complexesCrystal Structures and PropertiesX-ray Diffraction in Crystallography
Günther Eulenberger1981-04-01Zeitschrift für Naturforschung B
Abstract Tl 4 Ge 4 Se 10 crystallizes in space group C2/c with a = 15.602(6), b = 15.549(5), c = 9.052(3) Å, β - 107.10(3)° and Z = 4. The compound was prepared by fusion of a stoichiometric mixture of Tl 2 Se and GeSe 2 . The crystal structure is characterized by adamantane-like anions [Ge 4 Se 10 ] 4- and Tl + catio…
Crystal Structures and PropertiesSolid-state spectroscopy and crystallographyChemical Thermodynamics and Molecular Structure
T. A. P. Kwak、P. W. Askins1981-04-01Journal of the Geological Society of Australia
The nomenclature of replacement deposits is reviewed in terms of two processes, namely those involving the reaction between: (a) carbonate and siliceous rocks and (b) carbonate and unusual solutions, commonly, but not always, related to granitoids. ‘Wrigglite’ skarn is an example of a replacement deposit produced by p…
Advanced ceramic materials synthesisFiber-reinforced polymer compositesMaterial Properties and Applications
Β. Eisenmann、Herbert Schäfer1981-04-01Zeitschrift für Naturforschung B
Abstract The new isotypic compounds BaGe 2 P 2 and BaGe 2 As 2 crystallize in the tetragonal system (P4 2 mc) with the following lattice constants: BaGe 2 P 2 : a = 761.8 ± 0.5 pm, c = 850.0 ± 0.5 pm, c/a = 1.12, BaGe 2 As 2 : a = 778.6 ± 0.5 pm, c = 866.4 ± 0.5 pm, c/a = 1.11. Fourbonded Ge atoms and twobonded P (As)…
Iron-based superconductors researchSemiconductor materials and interfacesSurface and Thin Film Phenomena
Malcolm Gerloch、Mark R. Manning1981-04-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural and ligand field parameters of some trigonally distorted tetrahedral cobalt(II) and nickel(II) complexesMalcolm Gerloch and Mark R. ManningCite this: Inorg. Chem. 1981, 20, 4, 1051–1056Publication Date (Print):April 1, 1981Publication History Published online1 May…
Metal complexes synthesis and propertiesMagnetism in coordination complexesLanthanide and Transition Metal Complexes
Charles V. Clemency、Feng-Chih Lin1981-04-01Clays and Clay Minerals
Abstract The rate of dissolution of phlogopite in an open system was measured at low temperature and pressure and at pH 3–5. The maximum dissolution rate was achieved by maintaining extremely low ionic concentrations in the solution using a cation-exchange resin (hydrogen form) as a trap for released cations. The resi…
Mesoporous Materials and CatalysisClay minerals and soil interactionsLayered Double Hydroxides Synthesis and Applications
Β. Eisenmann、Hanna Jordan、Herbert Schäfer1981-04-01Zeitschrift für anorganische und allgemeine Chemie
Abstract Die erstmals dargestellten isotypen Verbindungen Ba 4 SiAs 4 , Ba 4 GeAs 4 , Sr 4 SiAs 4 und Sr 4 GeAs 4 kristallisieren kubisch, Raumgruppe P 4 3n, mit 8 Formeleinheiten in der Elementarzelle: In den Strukturen liegen isolierte, d.h. nur von Ba‐Ionen umgebene SiAs ‐ bzw. GeAs ‐Tetraeder vor. Die Verbindungen…
Crystal Structures and PropertiesIron-based superconductors researchInorganic Chemistry and Materials
B Uratani-Wong、Juan M. Lopez、Ernst Freese1981-04-01Journal of Bacteriology
In Bacillus subtilis, conditions causing partial deprivation of guanine nucleotides initiated sporulation and caused the synthesis of citrate synthase, aconitase, and alpha-ketoglutarate dehydrogenase. Alpha-ketoglutarate dehydrogenase could also be induced by acetate, and the specific activity of this enzyme was elev…
Bacterial Genetics and BiotechnologyEnzyme Structure and FunctionAmino Acid Enzymes and Metabolism
D. E. Holmes、H. C. Gatos1981-04-01Journal of Applied Physics
An experimental investigation of the morphological stability of the planar solid-liquid interface was carried out in which, for the first time, all pertinent solidification parameters were determined quantitatively and the effect of convenction was evaluated. The microscopic growth rate and interface morphology were d…
Solidification and crystal growth phenomenaMetallurgical Processes and ThermodynamicsFluid Dynamics and Thin Films
B. E. Read、Jennifer Duncan1981-04-01Polymer Testing
Methods for measuring various storage moduli and damping factors of glassy polymers in the frequency range 10−2 to 10−7 Hz are critically reviewed. At frequencies between about 10−2 and 200 Hz, components of the complex tensile modulus E∗ and complex Poisson's ratio ν∗ have been determined at 21 °C for polymethyl meth…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesStructural Analysis of Composite Materials
Teresa H. Swanson、Steven Bailey1981-04-01Clays and Clay Minerals
Abstract The structure of a lepidolite-2 M 1 from Biskupice, Czechoslovakia, has been redetermined. Violations of systematic extinctions and of monoclinic equivalences plus the results of a second harmonic generation test indicate that the true symmetry most likely is C 1̄. The deviation of the data set from C 2/ c sy…
Crystal Structures and PropertiesClay minerals and soil interactionsMineralogy and Gemology Studies
Anne Buyle Padías、H. K. Hall1981-04-01Journal of Polymer Science Polymer Chemistry Edition
Abstract A process that uses terephthalic acid and excess 1,4‐butanediol for the production of polybutylene terephthalate was investigated and the reaction conditions were maximized for fast reaction and minimal loss of butanediol by dehydration to tetrahydrofuran. For best results a mixed catalyst was selected: butyl…
biodegradable polymer synthesis and propertiesCatalysis for Biomass ConversionSynthesis and properties of polymers
Ken‐ichi Machida、Gin‐ya Adachi、Yoshikazu Moriwaki 等 4 位作者1981-04-01Bulletin of the Chemical Society of Japan
Abstract The crystal structures of Eu2B5O9X (X=Cl and Br) were determined by the method of X-ray diffraction analysis and refined by the least-square method to give R=0.054 for 1967 observed reflections of Eu2B5O9Cl and R=0.047 for 1979 observed reflections of Eu2B5O9Br. These haloborates are isostructural and belong…
Luminescence Properties of Advanced MaterialsCrystal Structures and PropertiesX-ray Diffraction in Crystallography
Bao Jingsheng、You Anji、Zhang Shengqing 等 5 位作者1981-04-01Journal of Applied Polymer Science
Abstract In this article, the polycondensation of terephthaloyl chloride and p ‐phenylenediamine was systematically studied, including the liquid–crystalline state of the solution and the spinning of poly(1,4‐phenyleneterephthalamide) (PPTA). High‐molecular‐weight PPTA with ε inh = 5–7 was prepared and the main factor…
Hydrogels: synthesis, properties, applicationsAdvanced Polymer Synthesis and CharacterizationSynthesis and properties of polymers