Keiji Sekiguchi、Motoko Kanke、Yasuyuki Tsuda 等 5 位作者1973-01-01Chemical and Pharmaceutical Bulletin
The transition temperature and the heat of transition between the hydrate and the anhdrous forms of phenobarbital were determined to be 36.4° and 1.87kcal/mole, respectively by the initial dissolution rate measurements. These values were in good agreement with values obtained by the conventional solubility equilibrium…
Crystallography and molecular interactionsAnalytical Chemistry and ChromatographyCrystallization and Solubility Studies
G. W. Gray1973-01-01Molecular crystals and liquid crystals
Because of the continued escalation of interest in liquid crystals and in their applications in display devices, the efforts of organic chemists have recently been concentrated on the synthesis of better mesogens for technological exploitation. Therefore, although the stability of available liquid crystal materials, t…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsMolecular spectroscopy and chirality
Chiyoko Henmi、Isao Kusachi、Kitinosuke Henmi 等 5 位作者1973-01-01Mineralogical Journal
The natural analogue of gehlenite hydrate synthesized by Carlson (1964) was found as an alteration product of gehlenite from Fuka, Okayama Prefecture, Japan, and as a crust on wollastonite from Carneal, Northern Ireland. The chemical analyses of the impure Fuka material substantiate the validity of Carlson's formula 2…
Mesoporous Materials and CatalysisCrystal Structures and PropertiesClay minerals and soil interactions
T.J. Bastow、H. J. Whitfield1973-01-01Journal of the Chemical Society Dalton Transactions
The title compound has been shown by X-ray single-crystal study to be isostructural with α-realgar, As4S4. Least-squares refinement of the structure gave R 0·11 for 1008 observed photographic reflections. The far-i.r. spectrum consists of As–Se stretching (205–253) and bending bands (93–135 cm–1). Mean distances: As–A…
Crystal Structures and PropertiesPhase-change materials and chalcogenidesSolid-state spectroscopy and crystallography
H. F. Mildrum、M. S. Hartings、K. Strnat 等 7 位作者1973-01-01AIP conference proceedings
Saturation magnetization values and uniaxial anisotropy constants at 20°C, also Curie points and other magnetic transition temperatures are reported for the alloys Sm2(Co1−xFex)17 as a function of x. For x = 0.3–0.7, the 2:17 phase is probably metastable at room temperature. Saturation has a peak of ∼16300 G at x = 0.…
Rare-earth and actinide compoundsMagnetic Properties and ApplicationsMagnetic Properties of Alloys
K. U. Snowden、K. Veevers1973-01-01Radiation Effects
Annealed Zircaloy-2 was exposed to fast neutron fluences in the range 0.46 to 6.71 × 1019 nvt, E > 1 MeV, at temperatures of up to 450°C. The level of radiation hardening, as measured by the change in yield stress after irradiation, increased with irradiation temperature at least up to 380°C. Post-irradiation annealin…
Nuclear reactor physics and engineeringNuclear Materials and PropertiesNuclear materials and radiation effects
Б. Б. Троицкий、G. A. Razuvaev、L. V. Khokhlova 等 4 位作者1973-01-01Journal of Polymer Science Polymer Symposia
Abstract The kinetics of deacetylation and benzene formation, and the polymer crosslinking and absorption spectra of PVAc during thermal degradation (in vacuo at 200–280°C with or without removal of volatile products) were studied. The effects of the molecular weight of PVAc samples and the addition of various substan…
Polymer crystallization and propertiesPolymer Nanocomposite Synthesis and IrradiationPolymer Science and PVC
M.P.J. Brennan、Roger Brettle1973-01-01Journal of the Chemical Society Perkin Transactions 1
Preparative electrolyses of triethylammonium heptanoate using different types of carbon as the anode material are reported. In protic solvents dodecane, the Kolbe dimer, is the major product at vitreous or baked carbon anodes, but the major products at a graphite anode are the three hexyl heptanoates. Large difference…
Conducting polymers and applications
J. D. Donaldson、David R. Laughlin、Sidney D. Ross 等 4 位作者1973-01-01Journal of the Chemical Society Dalton Transactions
Phases and compositions obtained from the molten systems CsPbCl3–CsPbBr3 and CsPbClnBr3–n-CsSnClnBr3–n have been identified and compared with those from the CsSnCl3–CsSnBr3 system. X-Ray powder data are consistent with all of the products being single-phase solid solutions based on the perovskite lattice and in which…
Perovskite Materials and ApplicationsSolid-state spectroscopy and crystallographyOptical properties and cooling technologies in crystalline materials
P.T. Cunningham、S. A. Johnson、Elton J. Cairns1973-01-01Journal of The Electrochemical Society
The equilibrium phase diagram of the lithium‐tellurium phase system has been investigated. Eutectic points occur at 179.9°C and greater than 99.0 atomic per cent (a/o) lithium, 448.5°C and 35.7 a/o lithium, and 423.1°C and 10.5 a/o lithium. Two intermediate phases, and , are present having melting points of 1204.5° an…
Phase-change materials and chalcogenidesSolid-state spectroscopy and crystallographyThermodynamic and Structural Properties of Metals and Alloys
Robert P. Clark1973-01-01Journal of Chemical & Engineering Data
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTHeats of fusion and heat capacities of lithium chloride-potassium chloride eutectic and potassium nitrateRobert P. ClarkCite this: J. Chem. Eng. Data 1973, 18, 1, 67–70Publication Date (Print):January 1, 1973Publication History Published online1 May 2002Published inissue 1 J…
Extraction and Separation ProcessesThermal and Kinetic AnalysisChemical Thermodynamics and Molecular Structure
Roeland J. M. Nolte、W. Drenth1973-01-01Recueil des Travaux Chimiques des Pays-Bas
Abstract The kinetics of polymerization of various isocyanides by nickel(II) compounds has been studied. The data suggest that reaction occurs by means of successive isocyanide insertions at a positive nickel centre.
Synthesis and properties of polymersMaterial Properties and ApplicationsChemistry and Chemical Engineering
R. Gale、Anthony J. McCaffery1973-01-01Journal of the Chemical Society Dalton Transactions
Magnetic circular dichroism (m.c.d.) and absorption spectra of the hexacyanoferrate (III) ion have been measured in two host lattices at room and liquid-helium temperatures. Previous interprepations of the charge-transfer(c.t)bands have been confirmed and new assignments of the d-d transitions have been made. With the…
Metal complexes synthesis and propertiesMagnetism in coordination complexesElectron Spin Resonance Studies
Harold H. Byer、L. C. Bobb、I. Lefkowitz 等 4 位作者1973-01-01Ferroelectrics
The polarized Raman spectra of large (1 cm × 1 cm diameter) single crystal specimens of proustite (Ag3AsS3) and pyrargyrite (Ag3SbS3) have been obtained The number of irreducible representations of the unit cell, C3μ6 factor group, was calculated and the nineteen fundamental Raman and infrared-active modes (K ≈ 0) wer…
Crystal Structures and PropertiesNonlinear Optical Materials ResearchSolid-state spectroscopy and crystallography
T. L. Chu、J Jackson、R. K. Smeltzer1973-01-01Journal of The Electrochemical Society
The crystal growth of boron phosphide, BP, has been investigated using two approaches: ( i ) the addition of phosphorus to a boron‐nickel or boron‐copper melt, and ( ii ) the recrystallization of boron phosphide from a nickel phosphide or copper phosphide solution in a temperature gradient. To determine the optimum co…
Diamond and Carbon-based Materials ResearchBoron and Carbon Nanomaterials ResearchAdvanced Materials Characterization Techniques
Yuhiko Yamashita、Jiro RYUGO、Kazuo Monobe1973-01-01Journal of Electron Microscopy
Lamellar cystals of amylose V complexes were prepared from aqueous solutions of amylose by using various complexing agents. Electron diffraction studies of these crystals revealed that three modifications exist. Furthermore it was found that the chain molecules of amylose in these modifications possess the 61, 71 and…
Surfactants and Colloidal SystemsEnzyme Structure and FunctionCrystallization and Solubility Studies
Hervé Mal1973-01-01Chemie Ingenieur Technik
Abstract The compound LaNi 5 absorbs nearly 6 atoms of hydrogen per formula unit at an equilibrium pressure of 2.5 at and room temperature. LaNi 5 exhibits a high rate of absorption and desorption of hydrogen and the heat of reaction is about 7.4 kcal/mol H 2 . The dependence of the equilibrium pressure in the two‐pha…
Hydrogen Storage and MaterialsSuperconducting Materials and ApplicationsAmmonia Synthesis and Nitrogen Reduction
Ronald Grigg、Richard Hamilton、M. Jozéfowicz 等 6 位作者1973-01-01Journal of the Chemical Society Perkin Transactions 2
The protonation behaviour of four porphyrins, two corroles, and aza-aetioporphyrin I in toluene–acetic acid mixtures has been studied by visible spectrophotometry. The macrocycles exist in the monoprotonated form in glacial acetic acid. The acidities of the seven monocations are compared. N-methyl substituted porphyri…
Porphyrin and Phthalocyanine ChemistryPhotochemistry and Electron Transfer StudiesPorphyrin Metabolism and Disorders
José A. S. Cavaleiro、Kevin M. Smith1973-01-01Journal of the Chemical Society Perkin Transactions 1
Treatment of trans-octaethylchlorin (1) with one equivalent of thallium(III) trifluoroacetate affords the corresponding aquo-hydroxide chelate (2) after chromatography on deactivated alumina; with four equivalents of the reagent, the ring opened dihydrobiliverdin (4) is obtained. When zinc trans-octaethylchlorin is tr…
Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesMetal-Catalyzed Oxygenation Mechanisms
J. Flis1973-01-01CORROSION
The effect of total carbon content on susceptibility of iron to stress corrosion cracking (SCC, on the depth of intergranular corrosion without stresses, anodic polarization curves, and the general corrosion rate was examined on decarburized Armco iron and its ferritic or martensitic alloys with carbon up to 1.4% in 5…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsNon-Destructive Testing Techniques