Tanemichi Chiba、Yuzo Murata、Tatsuro Koike1981-01-01Biomedical Research
Morphological changes in pheochromocytoma (PC12) cells induced by administration of nerve growth factor (NGF), dexamethasone, 5-OH-DA and 6-OH-DA were examined by fluorescence histochemistry and electron microscopy. 1) After 8 days of incubation with 2.5 S NGF (0.1 pg/ml), the branching processes of PC12 cells showed…
Nanoparticle-Based Drug DeliveryPorphyrin and Phthalocyanine ChemistryAnalytical Chemistry and Sensors
Shozo NARA、H. Takeo、Takashi Komiya1981-01-01Starch - Stärke
Abstract Cellulose and the various starches were dried in vacuum line apparatus, deuterated in liquid deuterium oxide, and dried in the same apparatus. Their accessibility was determined by measurement of the maximum absorbance (a) and the integral absorbance (b) at the wave number of each OH and OD group band on the…
Advanced Cellulose Research StudiesGrowth and nutrition in plants
David J. Wollkind、Ronald D. Notestine1981-01-01IMA Journal of Applied Mathematics
An investigation is made of the stability of the shape of a moving planar interface between the solid and liquid phases during the solidification of a pure substance. The prototype problem of controlled two-dimensional growth of a pure solid into a thermally undercooled liquid bath is considered. The model employed po…
Solidification and crystal growth phenomena
P. de Mayo、Keiji Okada、Maria Rafalska 等 5 位作者1981-01-01Journal of the Chemical Society Chemical Communications
A bimolecular process on dry silica gel, the photodimerisation of acenaphthylene, has been accomplished, both by direct excitation and by sensitisation, and its behaviour compared with that in solution and that expected for a two-dimensional fluid model.
Catalytic Processes in Materials ScienceMesoporous Materials and CatalysisCatalysis and Oxidation Reactions
A. Kumao、Hatsujiro Hashimoto、Kensuke Shiraishi1981-01-01Journal of Electron Microscopy
Energy, temperature and electron current dependence of the contamination rate have been examined experimentally. When the density of the electron current irradiating a specimen is of the order of 10−3 A/cm2, the contamination rate is inversely proportional to (v/c)2, where v and c are the velocities of electrons and l…
Advanced Electron Microscopy Techniques and ApplicationsThermography and Photoacoustic TechniquesElectron and X-Ray Spectroscopy Techniques
Zdeněk Johan、Joseph Mantienne、Paul Picot1981-01-01Bulletin de Minéralogie
Chabourneite, Tl₂₁(Sb, As)₉₁S₁₄₇ is triclinic, P1, with a = 16.346, b = 42.602, c = 8.534 Å, α = 95.86°, β = 86.91°, γ = 96.88°, Z = 1, Dx = 5.121 g.cm⁻³. The strongest lines in the powder pattern are : 4.196(5) (0.10.0 ; 2.8.0), 4.067(6) (0.[-4].2 ; [-4].2.0), 3.928(7) ([-4].4.0), 3.573(10) (2.[-6].2 ; 2.10.0), 3.485…
Ionic liquids properties and applicationsCrystal Structures and PropertiesThallium and Germanium Studies
Masaru Nakahara、Yosuke Yoshimura、Jirō Ōsugi1981-01-01Bulletin of the Chemical Society of Japan
Abstract The volumetric behaviors of cholesteryl oleyl carbonate (COC) and cholesteryl oleate(CO) were investigated around the smectic(Sm)-cholesteric(Ch) and cholesteric-isotropic(I) transitions by using chromatographically purified materials. Both transitions showed marked pretransition phenomena in COC and CO. The…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsMolecular spectroscopy and chirality
C. Young1981-01-01OpenAlex
The design and use of kinetic energy marine sediment penetrators require a capability for predicting penetration depth. A natural test target of soft saline clay deposits was chosen for its similarity to marine sediments, and 35 instrumented penetrator tests were conducted. An equation was developed to fit the data wi…
Geophysical Methods and ApplicationsFluid Dynamics Simulations and InteractionsHigh-Velocity Impact and Material Behavior
Yoshihiro Kobori、Shuichi Naito、Takaharu Onishi 等 4 位作者1981-01-01Journal of the Chemical Society Chemical Communications
The H2–D2 kinetic isotope effect was measured on a Ru/SiO2 catalyst not only for the hydrogenation of CO but also for the hydrogenation of deposited carbon formed bv disproportionation of CO; similar inverse kinetic isotope effects were observed in both cases, which led to the conclusion that the rate-determining step…
Advanced Chemical Physics StudiesCatalytic Processes in Materials ScienceCatalysts for Methane Reforming
Robert A. Anderson、R. G. Kepler1981-01-01Ferroelectrics
It is demonstrated theoretically and experimentally that the direct and converse piezoelectric coefficients. ∂P/∂σ and ∂ε/∂E, are not equal as is generally believed. The correct relationship between these coefficients is derived, and it is shown that the experimentally measured quantities analogous to the piezoelectri…
Ferroelectric and Piezoelectric MaterialsUltrasonics and Acoustic Wave PropagationAcoustic Wave Resonator Technologies
KR McKinney、RW Rice1981-01-01OpenAlex
The variation of apparent KIc with crack length is being studied using a variety of commercial ceramic materials. Test methodology is much the same as has been used in the past for natural rock (notched bend test). Where sufficiently definitive data have been obtained, each material showed decreasing KIc with decreasi…
Advanced ceramic materials synthesisFatigue and fracture mechanicsNumerical methods in engineering
D.W. McKee1981-01-01AIP conference proceedings
Various mechanisms have been invoked in the past to explain the effects of catalysts on the gasification reactions of carbon. However in many cases the observed catalytic behavior can be interpreted in terms of oxidataion‐reduced cycles occurring on the carbon surface. This paper describes how the techniques of therma…
Carbon Nanotubes in CompositesCatalysis and Oxidation ReactionsThermal and Kinetic Analysis
Roger J. Snow、Christopher J. R. Fookes、Alan R. Battersby1981-01-01Journal of the Chemical Society Chemical Communications
The chemistry of nitroalkanes has been used to develop two rational synthetic routes to the new class of Cmethylated chlorins.
Nitric Oxide and Endothelin EffectsPorphyrin and Phthalocyanine ChemistryChemical Analysis and Environmental Impact
Andrew Garton、D. J. Carlsson、D. M. Wiles1981-01-01Textile Research Journal
The potential of Fourier-Transform Infrared (FTIR) spectroscopy for characterizing polyethylene terephthalate (PET) fibers is examined both from a practical and a theoretical view point. Problems associated with sample preparation, spectral data analysis, and refraction and reflection at the fiber surfaces are discuss…
Textile materials and evaluationsRecycling and Waste Management Techniques
D. C. Edmeades、O. E. Clinton1981-01-01Communications in Soil Science and Plant Analysis
A simple single‐extraction procedure for measuring exchangeable cations and effective CEC (ECEC, the CEC at natural pH and ionic strength) has been developed for routine advisory soil analysis. The method is based on the use of Sr (1.26M SrCl2) to displace exchangeable cations and effective CEC is taken as the sum of…
Analytical chemistry methods developmentClay minerals and soil interactionsMine drainage and remediation techniques
Sharon K. Brauman1981-01-01Journal of Applied Polymer Science
We pyrolyzed PVC with and without the char-promoters iron (III) pyromellitate, zinc pyromellitate, and MoO3 (1 phr) under isothermal conditions (207°C, nitrogen) and analyzed the soluble and insoluble residues to characterize the reactions important to charring. Both pyromellitates, apparently acting as their metal ch…
Environmental remediation with nanomaterialsPolymer Science and PVC
J. Willemse、W. P. Bosnian、J. H. Noordik 等 4 位作者1981-01-01Recueil des Travaux Chimiques des Pays-Bas
Abstract Deprotonated N ‐phenyl, N ′, N ′‐dialkylthiourea (PhtuR 2 ) complexes of Cu(I) and Cu(II) have been isolated and the existence of a Cu(III) complex inferred from electrochemical measurements. The crystal structure of Cu(I)[(C 6 H 5 )NC(S)N[(C 2 H 4 ) 2 O]] (space group P l̄, Z = 24, a = 10.487(9), b = 28.961(…
Metal complexes synthesis and propertiesMagnetism in coordination complexesOrganic and Molecular Conductors Research
M. P. Reddy、G. S. K. RAO1981-01-01Journal of the Chemical Society Perkin Transactions 1
A high-yield six-step synthesis of sequirin D (1a), a naturally occurring norlignan, is described. Michael addition of deoxyanisoin (2) to acrylonitrile gives a ketonitrile (3), which on Wolff–Kishner reduction is reduced and hyrolysed in situ to 4,5-bis-p-methoxyphenylpentanoic acid (4). Cyclodehydration of (4) with…
Natural product bioactivities and synthesisPlant Toxicity and Pharmacological PropertiesPhytochemistry and Bioactive Compounds
David A. Buckingham、Charles R. Clark、Wayne S. Webley1981-01-01Journal of the Chemical Society Chemical Communications
In aqueous dimethylformamide solution meso-αααα-tetra(o-maleamoylphenyl)porphyrin undergoes rapid metal incorporation (CuII, ZnII, CoII, and NiII) by a mechanism featuring rate-determining intramolecular transfer of the metal ion from the carboxylate binding site to the porphyrin nucleus.
Supramolecular Chemistry and ComplexesPorphyrin and Phthalocyanine ChemistryPorphyrin Metabolism and Disorders
Kenji Uchino、S. Nomura、L. E. Cross 等 4 位作者1981-01-01Phase Transitions
The fact that the polarization-related electrostrictive coefficients Q in the relaxor type ferro-electrics are almost an order of magnitude smaller than in most normal ferroelectric perovskites can be explained under the assumption that the temperature dependence of the soft-mode TO phonon frequency is given as ω2 TO…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesSolid-state spectroscopy and crystallography