J. A. McKeague、P. A. Schuppli1982-10-01Soil Science
Centrifugation for long times or at high speeds resulted in progressively decreasing concentrations of iron and aluminum in 0.1 M sodium pyrophosphate extracts of soil. Centrifugation at 80 000 g for 6 hours, as compared with 20 000 g for 20 minutes, decreased the Fe concentrations from 23 to 80 percent and the Al con…
Clay minerals and soil interactions
E. L. Rodriquez、F. E. Filisko1982-10-01Journal of Applied Physics
Temperature changes as a result of large rapid hydrostatic pressure changes were measured for poly(methyl methacrylate) at various temperatures from ambient to 95 °C and for various pressure increments from 14 to 207 MN/m2. We observe complete reversibility of the measurements over the pressure range studied. The valu…
Crystallography and molecular interactionsThermal and Kinetic AnalysisChemical Thermodynamics and Molecular Structure
Robert M. Richman、Mark W. Peterson1982-10-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhotodisproportionation of .mu.-oxo-bis[(tetraphenylporphinato)iron(III)]Robert M. Richman and Mark W. PetersonCite this: J. Am. Chem. Soc. 1982, 104, 21, 5795–5796Publication Date (Print):October 1, 1982Publication History Published online1 May 2002Published inissue 1 Octob…
Porphyrin and Phthalocyanine ChemistryRadioactive element chemistry and processingMetal-Catalyzed Oxygenation Mechanisms
George E. Harlow1982-10-01American Mineralogist
Cell-parameter and structure refinements using single-crystal X-ray diffraction have been carried out on three natural low-Ca anorthoclases (K-analbites), (Or32.5Ab66.7Ano.s, Or22.3Ab7o.sAn69'Orl3.sAbs3.7An2.5),at room temperature and at temperatures above the triclinic/monoclinic symmetry inversion (400°, 510°, and 7…
Crystal Structures and PropertiesInorganic Chemistry and MaterialsX-ray Diffraction in Crystallography
William J. Bailey、Shang‐Ren Wu、Zhende Ni1982-10-01Journal of Macromolecular Science Part A - Chemistry
Two alkyl-substituted cyclic ketene acetals, 4-n-hexyl-2-methylene-1,3-dioxolane (4) and 4-n-decyl-2-methylene-1,3-dioxolane (6), were shown to undergo free radical ring-opening polymerization with the introduction of an ester group into the backbone of an addition polymer. The spontaneous polymerization of 4 (presuma…
Organometallic Complex Synthesis and CatalysisPolyoxometalates: Synthesis and ApplicationsSynthetic Organic Chemistry Methods
E. Thibaut、Jean Pol Boutique、J.J. Verbist 等 5 位作者1982-10-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of uranium halides and oxyhalides in the solid state. An x-ray photoelectron spectral study of bonding ionicityElisabeth Thibaut, Jean Pol Boutique, Jacques J. Verbist, Jean Claude Levet, and Henri NoelCite this: J. Am. Chem. Soc. 1982, 104, 20, 5266–527…
Radioactive element chemistry and processingNuclear Materials and PropertiesNuclear materials and radiation effects
Yuzo Saeki、Ryoko Matsuzaki、Akimasa Yajima 等 4 位作者1982-10-01Bulletin of the Chemical Society of Japan
Abstract The reaction products of gaseous TiCl4 with ammonia were TiCl4·5NH3 at 200 °C, TiCl4·5NH3, TiClN, and NH4Cl at 250–400 °C, TiCl4·5NH3, TiClN, TiNx, and NH4Cl at 450–650 °C, TiNx and NH4Cl at 700–1000 °C, and TiNx, NH4Cl, and HCl at 1100–1400 °C. The N/Ti atomic ratio, x, of the TiNx formed was 1.21 at 700 °C,…
Catalytic Processes in Materials ScienceAmmonia Synthesis and Nitrogen ReductionInorganic Chemistry and Materials
Hideatsu Maeda、E. Fukada1982-10-01Biopolymers
Abstract The complex piezoelectric constant ( d = d ′ − id ″), elastic constant ( c = c ′ + ic ″), and dielectric constant (ε = ε′ − i ε″) were measured at a frequency of 10 Hz over the temperature range from −150 to 50°C and for a range of hydration up to 0.26 g/g for decalcified bone and up to 0.084 g/g for bone. Fo…
Bone Tissue Engineering MaterialsDental Implant Techniques and OutcomesCollagen: Extraction and Characterization
Angie Sarkis、Earl Callen1982-10-01Physical review. B, Condensed matter
The exchange coupling between rare-earth ($R$) and transition-metal ($T$) moments in ${R}_{x}{T}_{y}$ compounds is not so large as to hold the $R$ and $T$ moments rigidly parallel (for light rare-earth elements) or antiparallel (for heavy rare-earth elements); ionic magnetocrystalline anisotropy energy can be comparab…
Magnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter PhysicsMagnetic Properties of Alloys
J.K. Bates、L.J. Jardine、M.J. Steindler1982-10-01Science
The aging of simulated nuclear waste glass by contact with a controlled-temperature, humid atmosphere results in the formation of a double hydration layer penetrating into the glass and in the formation of minerals on the glass surface. The hydration process described here provides insight into the aging kinetics of n…
Glass properties and applicationsRecycling and utilization of industrial and municipal waste in materials productionNuclear materials and radiation effects
Graham Cox、Christiane Bobillier、David G. Whitten1982-10-01Photochemistry and Photobiology
Abstract Protoporphyrin IX and its various ester derivatives have been previously shown to undergo self‐sensitized photooxygenation to yield hydroxyaldehydes (photoprotoporphyrin) and mono‐ and diformyl deuteroporphyrin derivatives. In the present study the photoreactions of these products in the presence of oxygen ha…
Porphyrin and Phthalocyanine ChemistryPhotodynamic Therapy Research StudiesMetal-Catalyzed Oxygenation Mechanisms
Minoru Sato、B. H. Grier、S. M. Shapiro 等 4 位作者1982-10-01Journal of Physics F Metal Physics
Neutron inelastic scattering measurements have been carried out on two single crystals of the thermally quenched gamma phase (FCC) alloy Fe 1-x Pd x with x=0.28 and 0.37. The x=0.28 sample (crystal 2) exhibits a face centred cubic to face centred tetragonal (FCC-FCT) transition at T m approximately 265K. The x=0.37 sa…
High-pressure geophysics and materialsRare-earth and actinide compoundsMagnetic Properties of Alloys
Tadao Sato、T. Ishii、Nobuo Setaka1982-10-01Journal of the American Ceramic Society
When rhombohedral BN, which has a layer structure with a three‐layered stacking sequence, was shock‐compressed at 40, 60, and 100 GPa, it was converted to cubic BN. Hexagonal BN was converted to wurtzite‐type BN under the same conditions. These results indicate that the transformation proceeds by a diffusionless mecha…
Graphene research and applicationsDiamond and Carbon-based Materials ResearchBoron and Carbon Nanomaterials Research
Djelloul Messadi、J.M. Vergnaud1982-10-01Journal of Applied Polymer Science
Abstract The transfer of plasticizer from compression‐molded sheets of plasticized poly(vinyl chloride) into ethanol–water mixtures was studied over the temperature range of 30–55°C. A simultaneous diffusion occurred for ethanol and water into polymer and for dioctylphthalate plasticizer from polymer into liquid. The…
Polymer crystallization and propertiesAdvanced Polymer Synthesis and CharacterizationPolymer Science and PVC
Yitzhak Rabin、William E. McMullen、William M. Gelbart1982-10-01Molecular crystals and liquid crystals
We present a simple theory of rod/plate liquid-crystal mixtures in which the angle-dependent pair interactions are assumed to be of second-rank form. Calculations are reported for varying relative anisotropies of the “rods” and “plates”. Temperature vs. mole-fraction phase diagrams show successive isotropic (I) → unia…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesNonlinear Dynamics and Pattern Formation
Andrew Proctor、Peter M. A. Sherwood1982-10-01Surface and Interface Analysis
Abstract Carbon fibres, surface treated by an industrial process, were analysed by x‐ray photoelectron spectroscopy (XPS). The results allow the surface chemistry to be compared with that achieved by controlled laboratory methods. It is found that industrial treatment has less control over individual fibre surface tre…
Nuclear Physics and ApplicationsElectron and X-Ray Spectroscopy TechniquesSurface Roughness and Optical Measurements
Rafael Acerete、Charles F. Hammer、Louis C. W. Baker1982-10-01Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTungsten-183 NMR of heteropoly and isopolytungstates. Explanations of chemical shifts and band assignments and theoretical considerationsRafael Acerete, Charles F. Hammer, and Louis C. W. BakerCite this: J. Am. Chem. Soc. 1982, 104, 20, 5384–5390Publication Date (Print):Octo…
Polyoxometalates: Synthesis and ApplicationsCatalysis and Oxidation Reactions
M.G. Drexhage、O. H. El‐Bayoumi、Cornelius T. Moynihan 等 7 位作者1982-10-01Journal of the American Ceramic Society
Beginning with a 19BaF 2 −27ZnF 2 −27YbF 3 −27ThF 4 (mol%) base glass, compositional modifications were made to improve optical properties and glass‐forming ability. Replacement of YbF 3 by LuF 3 removed a strong near‐ir electronic absorption band, and small additions of LiF and NaF improved glass quality. The multico…
Luminescence Properties of Advanced MaterialsGlass properties and applicationsSolid State Laser Technologies
Kazuyuki Kakegawa、Jun‐ichi Mohri、S. Shirasaki 等 4 位作者1982-10-01Journal of the American Ceramic Society
Tetragonal and rhombohedral phases always coexist in Pb(Zr x Til 1−x )0 3 near the morphotropic phase boundary compositions (0.52≤x≤0.55) when prepared by solid‐solid reaction among the constituent oxides. A special technique was developed to obtain perovskite ceramics exhibiting no co‐existence in the boundary compos…
Ferroelectric and Piezoelectric MaterialsMaterial Dynamics and PropertiesAcoustic Wave Resonator Technologies
H. Chanzy、S. Nawrot、A. Péguy 等 5 位作者1982-10-01Journal of Polymer Science Polymer Physics Edition
Abstract The crystallization and melting behavior of the system N ‐methylmorpholine‐ N ‐oxide (MMNO)–H 2 O–cellulose has been studied by differential scanning calorimetry, optical and electron microscopy, and x‐ray scattering. The phase diagram of the MMNO–H 2 O solvent system is reported up to a water content of 28%…
Liquid Crystal Research AdvancementsAdvanced Cellulose Research StudiesMaterial Properties and Processing