Takashi Nakagawa、Kôji Hayashi、Hiroshi Mitsuhashi1983-01-01Chemical and Pharmaceutical Bulletin
The aglycone portion of the glycosides of the chinese crude drug "Pai-ch'ien" was investigated. Three new compounds named glaucogenin-A (1), -B (3), and -C mono-D-thevetoside (8) were isolated and their structures were characterized on the basis of spectroscopic and chemical evidence, and that of 8 was determined by X…
Natural product bioactivities and synthesisPhytochemistry and Biological ActivitiesPhytochemistry and Bioactive Compounds
L BABCOCK、Richard Pizer1983-01-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTComments on the formation of bis(catecholato)borates. Potassium bis(4-methylcatecholato)borate(III)Lucia Babcock and Richard PizerCite this: Inorg. Chem. 1983, 22, 1, 174–176Publication Date (Print):January 1, 1983Publication History Published online1 May 2002Published iniss…
Inorganic and Organometallic ChemistryThermal and Kinetic AnalysisOrganometallic Compounds Synthesis and Characterization
Harold M. Goff、Eric T. Shimomura、Martin A. Phillippi1983-01-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCorrelations of axial ligand field strength and zero-field splittings in the carbon-13 NMR spectra of five- and six-coordinate high-spin iron(III) porphyrin complexesHarold M. Goff, Eric T. Shimomura, and Martin A. PhillippiCite this: Inorg. Chem. 1983, 22, 1, 66–71Publicati…
Magnetism in coordination complexesPorphyrin and Phthalocyanine ChemistryHemoglobin structure and function
J. Tanaka、Hiroshi Nozaki、Sachio Horiuchi 等 4 位作者1983-01-01Journal de Physique Lettres
La phase monoclinique de l'oxyde de manganèse complexe (La0,8Ca 0,2)MnO3 préparé par la méthode de co-précipitation présente un comportement magnétique particulier : l'aimantation diminue très rapidement à une température de 30 °C inférieure au point de transition ferromagnétique, où la résistivité électrique change.…
Magnetic and transport properties of perovskites and related materialsRare-earth and actinide compoundsAdvanced Condensed Matter Physics
S. A. Horton、H. C. Child1983-01-01Metals Technology
The relationship between the microstructure and properties of high-speed steels has been examined, with particular reference to fracture toughness (as measured by KIC) and fatigue-crack growth rates. Different microstructures have been obtained by varying the heat-treatment parameters - austenitizing temperatures and…
Microstructure and Mechanical Properties of SteelsHigh Temperature Alloys and CreepMetal Alloys Wear and Properties
RW Monroe、CE Bates、C. D. Pears1983-01-01OpenAlex
The possibility of an ignition event leading to component combustion is a significant consideration in the design and operation of all oxygen production and handling systems. Most materials of construction can react violently with oxygen if ignition occurs. This paper discusses some of the current concepts of ignition…
High-Temperature Coating BehaviorsNuclear Materials and PropertiesEngineering and Material Science Research
Nobutaka Miura、Takao Saito、Tatsuya Kanamaru 等 5 位作者1983-01-01Transactions of the Iron and Steel Institute of Japan
Three new types of corrosion-resistant steel sheets for automotive body panels have been developed.1) Zinc-nickel alloy electroplated steel sheet2) Two-layer zinc-iron alloy electroplated steel sheet3) Organic composite-coated steel sheetWith their protective coating alloyed, applied in two layers or composited, these…
Corrosion Behavior and InhibitionMaterial Properties and Applications
J. Kyle1983-01-01Journal of the Chemical Society Dalton Transactions
The kinetics of the decomposition of [PW12O40]3–(1.5 × 10–5 mol dm–3) to [WO4]2– and [PO4]3– has been studied in the range pH 7–9 at an ionic strength of 0.1 mol dm–3. The reaction proceeds via the intermediates [PW11O39]7– and [PW9O34]9–. Only the final stage, the hydrolysis of [PW9O34]9–, was studied in detail. The…
Radioactive element chemistry and processingPolyoxometalates: Synthesis and ApplicationsChemical Synthesis and Characterization
V. G. Rumyantsev、А. В. Иващенко、V. M. Muratov 等 6 位作者1983-01-01Molecular crystals and liquid crystals
The nove approach is proposed to the synthesis of dyes with negative dichroism. The molecular models, which are adequate to the dichroic dyes, are shown. As an example of the approach, the synthesis and dischroic properties of some derivatives of the 2,2′-azomidazole are described. The time and contrast chracteristics…
Liquid Crystal Research AdvancementsPhotonic Crystals and ApplicationsPhotochemistry and Electron Transfer Studies
A. J. Sedriks1983-01-01International Metals Reviews
The role of sulphide inclusions in the pitting and crevice corrosion of stainless steels is reviewed. It is noted that manganese sulphides, particularly those containing a central oxide core, are the most favourable sites for pit initiation. Replacing the manganese in the sulphide by chromium renders pit initiation mo…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsConcrete Corrosion and Durability
Akihiko Kimura、Hiroshi Kimura1983-01-01Journal of the Japan Institute of Metals and Materials
Carbon tends to suppress the grain boundary fracture (GBFR) of α-iron, which is promoted by the segregation of phosphorus and other impurities to grain boundaries. This effect of carbon is due to its grain boundary segregation. It is shown in the present paper that the same effect of carbon is observed when hydrogen i…
Microstructure and Mechanical Properties of SteelsHydrogen embrittlement and corrosion behaviors in metalsMaterial Properties and Failure Mechanisms
Hermann Gies1983-01-01Medical Entomology and Zoology
The high temperature form of melanophlogite, 46 Si02. 6MI4 .2M12(M12 =CH4, N2; M14= C02, N2), is cubic with space group Pm3n and a= 13.436(3) A at 200°C. The mineral is isostructural with the cubic gas hydrates of type 1. Structure refinement with 667 independent reflections led to a weighted Rw= 0.040. Corner-sharing…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisCrystal Structures and Properties
David N.‐S. Hon、K. S. V. Srinivasan1983-01-01Journal of Applied Polymer Science
Abstract Mechanical processing of cotton cellulose by means of a fiber cutter resulted in the disaggregation and defiberation of fiber bundles, shortening of fiber length, and loss of degree of polymerization. It is evident that the mechanical energy supplied by shear forces is sufficient to cause homolytic scission o…
Advanced Cellulose Research StudiesDyeing and Modifying Textile FibersTextile materials and evaluations
A. Nørlund Christensen、Rolf Stomberg、Tuovi Raikas 等 5 位作者1983-01-01Acta chemica Scandinavica/Acta chemica Scandinavica. B, Organic chemistry and biochemistry/Acta chemica Scandinavica. A, Physical and inorganic chemistry/Acta chemica Scandinavica. Series B. Organic chemistry and biochemistry/Acta chemica Scandinavica. Series A, Physical and inorganic chemistry
Croissance de Mo 3 Si par la methode TSZM et de Mo 5 Si 3 par la methode Czochralski. Caracterisation par diffraction de neutrons sur monocristal et sur poudre respectivement. Mo 3 Si cristallise dans Pm3n avec a=4,897 A, distance Mo−Mo la plus courte de 2,449 A. Mo 5 Si 3 cristallise dans In/mcm avec a=9,650 et c=4,9…
Intermetallics and Advanced Alloy PropertiesMXene and MAX Phase MaterialsInorganic Chemistry and Materials
H. J. Stocker、D. E. Aspnes1983-01-01Applied Physics Letters
Dark currents on In0.53Ga0.47As mesa photodiodes can be reduced significantly by treating the surfaces with H2SO4:H2O2:XH2O (10≤X≤500) instead of the usual bromine-methanol etch. Using spectroscopic ellipsometry we show that peroxide etches form porous amorphous As or oxide overlayers according to whether the pH value…
Semiconductor Quantum Structures and DevicesSilicon Nanostructures and PhotoluminescenceAdvanced Semiconductor Detectors and Materials
J. Bradley Nelson1983-01-01OpenAlex
Celion® 6000/PMR-15, Celion 6000/LARC-160, and Celion 6000/RK-99 graphite/polyimides were aged in circulating air ovens at temperatures of 202, 232, 260, and 288°C for various times up to 15 000 h. Three unidirectional specimens were studied: short-beam-shear (SBS), flexure, and 153-mm square panels. The interior regi…
Fiber-reinforced polymer compositesSynthesis and properties of polymersSilicone and Siloxane Chemistry
J�rgen-Hinrich Fuhrhop、Joachim Mathieu1983-01-01Journal of the Chemical Society Chemical Communications
A monolayer vesicle membrane with a (large) thiosuccinic acid and a (small) sulphonic acid head groups is orientated in such a way that 98% of the large head groups are on the outside and, correspondingly, 98% of the small head groupsd are inside.
Lipid Membrane Structure and BehaviorPorphyrin and Phthalocyanine ChemistrySupramolecular Self-Assembly in Materials
Abha Gupta、Gilda H. Loew、James G. Lawless1983-01-01Inorganic Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTInteraction of metal ions and amino acids: possible mechanisms for the adsorption of amino acids on homoionic smectite claysAbha Gupta, Gilda H. Loew, and James LawlessCite this: Inorg. Chem. 1983, 22, 1, 111–120Publication Date (Print):January 1, 1983Publication History Pub…
Clay minerals and soil interactions
T. Takahashi、Hirofumi Mizuno、Edwin L. Thomas1983-01-01Journal of Macromolecular Science Part B
The addition of ethylene-propylene random copolymer (EPR) to polypropylene (PP) homopolymer and the synthesis of polypropylene/ethylene-propylene block-sequential copolymer (PP/E-P) have been developed in order to improve upon the mechanical properties of PP resin. The block-sequential polypropylene/ ethylene-propylen…
Polymer crystallization and propertiesEpoxy Resin Curing ProcessesFiber-reinforced polymer composites
Christopher A. Lipinski1983-01-01Journal of Medicinal Chemistry
A process of bioisosteric drug design is described whereby, in a manner analogous to synthesis, key portions of an effector molecule are successively replaced by pharmacophores or bioisosteres. This process, when applied to histamine, leads to the competitive histamine H2-receptor antagonist prototype 3-amino-5-(2-ami…
Molecular Junctions and NanostructuresSynthesis and properties of polymersOrganic Chemistry Cycloaddition Reactions