Jack Barrett、J. D. Donaldson、Jack Silver 等 4 位作者1977-01-01Journal of the Chemical Society Dalton Transactions
A series of coloured compounds of general formula CsPb1–xSnxX3(X3= Br3 or Br2Cl) has been prepared. X-Ray and Mössbauer data show that the compounds have highly symmetrical tin–lead environments. Their electronic resistivity and optical-reflectance spectra are interpretable in terms of the partial filling of electroni…
Crystal Structures and PropertiesSolid-state spectroscopy and crystallographyInorganic Chemistry and Materials
Y. Sakamoto、U-ichi Hanada1977-01-01Transactions of the Japan Institute of Metals
An investigation of hydrogen diffusion in a martensitic Type 403 stainless steel subjected to heat treatment was carried out in an attempt to establish the effect of heat treated microstructure on diffusivity and solubility of hydrogen. The diffusivity and solubility vary with the microstructure and the diffusion coef…
Microstructure and Mechanical Properties of SteelsHydrogen embrittlement and corrosion behaviors in metalsHigh Temperature Alloys and Creep
C. Brémard、Maurice Muller、G. Nowogrocki 等 4 位作者1977-01-01Journal of the Chemical Society Dalton Transactions
The salt Na2[Ru(NO)(NO2)4(OH)] reacts with barbituric acid in water to give Na[Ru(H2va)3](H2va–= bidentate violurate), and with 1,3-dimethylbarbituric acid to give Na[Ru(dmva)3](dmva–= bidentate 1,3-dimethylviolurate). The complexes react with Na[NO2] in acidic aqueous solutions to afford a series of novel diamagnetic…
Nitric Oxide and Endothelin EffectsMetal complexes synthesis and propertiesMagnetism in coordination complexes
J. C. McMenamin、W. E. Spicer1977-01-01OpenAlex
Ultraviolet photoemission spectroscopy (UPS) has been used to study the valence-band electronic structure of $2H\ensuremath{-}\mathrm{M}\mathrm{o}{\mathrm{S}}_{2}$. The samples were cleaved or heated in ultrahigh vacuum of \ensuremath{\sim} 1 \ifmmode\times\else\texttimes\fi{} ${10}^{\ensuremath{-}10}$ Torr to achieve…
2D Materials and ApplicationsMachine Learning in Materials ScienceInorganic Chemistry and Materials
Takeshi Kuroki、Tsutomu Honda、Yuuki Sekiguchi 等 6 位作者1977-01-01NIPPON KAGAKU KAISHI
ポリスチレンの熱分解反応を流通系充てん層反応器で実施するとともに,生成物の同定を行なった。熱処理試料(280℃/hr)と原試料の熱分析では,低温度領域と高温度領域の二段階反応が存在し,熱劣化の影響は低温度領域の活性化エネルギーに顕著に示された。原試料54.7kcal/mol,熱処理試料30.2kca1/molが得られた。処理温度2500C,1時間以下では原試料とかわらない。同定した成分は20種類,そのなかの主要なものは,α-メチルナフタレン,ビフェニル,1,2-ジフェニルプロバン,1,2-ジフェニルー1-プロペン,1,3-ジフェニルー1-プロペンである。不揮発成分は500℃ではワヅクス,350。Cでは二量体相当留分のグリース状であ…
Polymer crystallization and propertiesFiber-reinforced polymer compositesPolymer Science and PVC
J.W. Mullin、H.M. Ang、H.M. Ang1977-01-01Kristall und Technik
Abstract The desupersaturation of nickel ammonium sulphate aqueous solutions, during the precipitation of the hydrated salt, has been followed by refractive index measurements. The addition of seed crystals has a considerable effect on the desupersaturation process: the induction and latent periods and the crystal siz…
Minerals Flotation and Separation TechniquesCrystallization and Solubility Studiesnanoparticles nucleation surface interactions
J. Cazaux、D. Gramari1977-01-01Journal de Physique Lettres
L'analyse, aux petits angles de diffusion, des spectres de pertes d'énergie d'électrons rapides traversant des films de carbone amorphe de 40 Å d'épaisseur nous a permis de mettre en évidence l'existence de deux plasmons de surface (ħωs1 ≃ 5,25 eV et ħωs2 ≃ 19,75 eV), dont la dispersion diffère nettement de celle qui…
Semiconductor materials and devicesElectron and X-Ray Spectroscopy TechniquesSurface Roughness and Optical Measurements
A. S. R. Juo1977-01-01Communications in Soil Science and Plant Analysis
Aluminum in soil saturation extracts and exchangeable Al determined by N KCl extraction were studied using a large number of Ultisol and Alfisol samples from West Africa. The concentration of soil solution Al ranged from 0.05 to 4.5 ppm. Solution Al content was generally higher in the surface horizon (Ap and A1) than…
Heavy metals in environmentClay minerals and soil interactionsAluminum toxicity and tolerance in plants and animals
Mario Ciampolini、Fabrizio Mani、Nicoletta Nardi1977-01-01Journal of the Chemical Society Dalton Transactions
A number of β-diketonates of cerium(III), [NEt4][CeIIIL4], and cerium(IV), [CeIVL4], have been prepared and their spectra have been recorded in the visible and u.v. regions. The spectra of the cerium(III) complexes show a group of two or three bands of moderate intensity at frequencies just below those of the strong i…
Metal complexes synthesis and propertiesLanthanide and Transition Metal ComplexesInorganic and Organometallic Chemistry
A. Packter1977-01-01Kristall und Technik
Abstract The kinetics of precipitation of barium chromate from well‐stirred aqueous solutions of initial solute concentrations C 0 = 0.0001 to 0.0010 M (supersaturations 8 to 80) was studied at 25 °C by conductivity measurements and chemical analysis. Nucleation occurred during induction periods and regular crystal gr…
Minerals Flotation and Separation TechniquesCrystallization and Solubility Studies
K.-Y. T. Kao、J. G. Leslie1977-01-01Connective Tissue Research
Fifty percent of human uterine collagen has been solubilized by limited pepsin digestion. Carboxymethyl cellulose-, Bio-gel A-5m-chromatography and amino acid analysis revealed that the solubilized collagen consists of 20% Type III and 80% Type I collagen. Reduction and alkylation reactions indicated that the alpha1(I…
Cell Adhesion Molecules ResearchCollagen: Extraction and Characterization
C. Wilkinson、Michael J. Sprague1977-01-01Zeitschrift für Kristallographie
The magnetic structure of NiWO 4 has been determined from neutron-diffraction measurements on single-crystal specimens. It is a collinear anti-ferromagnet in which the nickel ions have moments of 2.25 ± 0.04 μ B at 19.4 ± 2.6° to the c axis in obtuse β . The form factor of the Ni ++ ions follows closely the free-ion f…
Luminescence Properties of Advanced MaterialsTransition Metal Oxide NanomaterialsSolid-state spectroscopy and crystallography
S. R. Fletcher、T. C. Gibb1977-01-01Journal of the Chemical Society Dalton Transactions
The crystal structures of Cs2Na[Fe(CN)6](I) and Cs2K[Fe(CN)6](II) have been elucidated by single-crystal X-ray analysis and compared with that of Cs2Li[Fe(CN)6]. Crystals of both are monoclinic, space group P21/n, with Z= 2 in unit cells of dimensions: (I), a= 10.870(1), b= 7.709(1), c= 7.573(1)Å, β= 89.994(6)°: (II),…
Organometallic Complex Synthesis and CatalysisMagnetism in coordination complexesInorganic Chemistry and Materials
J. D. Siegwarth1977-01-01Journal of Applied Physics
Peaks observed in the temperature dependence of the dielectric constant of SrTiO3 glass ceramics do not appear in the dc polarization. A remanent polarization is observed between 4 and 77 K. The dielectric properties at low temperature are attributed to the relaxation of permanent dipoles to an electret state rather t…
Ferroelectric and Piezoelectric MaterialsGlass properties and applicationsMicrowave Dielectric Ceramics Synthesis
Shigeru Asano、Ryutaro Tsunoda、Rikuro Otsuka1977-01-01Journal of the Japan Institute of Metals and Materials
The temperature dependence of internal friction was measured from 100 to 350 K at a frequency of about 700 Hz for hydrogen-charged 310S, 316 and 304 stainless steels. A characteristic relaxation peak due to dissolved hydrogen was found at about 280 K, on which there is little information in the literature. The charact…
Corrosion Behavior and InhibitionHydrogen embrittlement and corrosion behaviors in metalsMaterial Properties and Failure Mechanisms
Haim Grosfeld、Hermona Soreq、Uriel Z. Littauer1977-01-01Nucleic Acids Research
The physical and functional properties of the mRNA population from developing embryos of the brine shrimp Artemia salina were characterized. About 20% of the total poly(A)-rich mRNA in these embryos appears to be specifically associated with the membrane fraction throughout early development, and physically differs ma…
RNA and protein synthesis mechanismsRNA Interference and Gene DeliverySilk-based biomaterials and applications
M. Lannoo1977-01-01Journal de physique
Local field effects are calculated in the R.P.A. approximation from two extreme points of view. The first consists of an analytical inversion of the dielectric matrix in reciprocal space. If confirms the results of recent numerical calculations, that local field effects tend to reduce the dielectric constant. The seco…
Ferroelectric and Piezoelectric MaterialsAcoustic Wave Resonator TechnologiesSurface and Thin Film Phenomena
Tosuke Murai、Mitsuo Ishikawa、Chikatoshi Miura1977-01-01Corrosion engineering digest
The critical potential of hydrogen absorption and the hydrogen absorption rate into titanium under catholic polarization have been measured in artificial sea water with flow velocity of 2.0m/sec and then the effect of flow velocity, dispersed sand, dissolved zinc ion and dissolved chlorine or oxygen gas on the hydroge…
Metal and Thin Film MechanicsHydrogen embrittlement and corrosion behaviors in metalsTitanium Alloys Microstructure and Properties
W. Urbach、F. Rondelez、P. Pierański 等 4 位作者1977-01-01Journal de physique
Streaming due to thermal surface tension gradients — the so-called Marangoni effect in isotropic fluids - has been observed in thin droplets of nematic liquid crystals deposited on a glass substrate. The coupling between the molecular orientation and the hydrodynamic flow induces distortions in the molecular alignment…
Liquid Crystal Research AdvancementsSurfactants and Colloidal SystemsFluid Dynamics and Thin Films
Peter Baas、Hans Cerfontain1977-01-01Journal of the Chemical Society Perkin Transactions 2
Upon irradiation at 366 nm (E)-3-ethoxyiminobutan-2-one undergoes EZ-isomerization. By spectroscopic analysis [i.r., u.v., and n.m.r. (a.s.i.s.)] it was established that the E- isomer exists in the s-trans-and the Z-isomer in the s-cis-conformation. The photostationary state (PSS) ratio obtained by direct irradiation…
Radical Photochemical ReactionsPhotochromic and Fluorescence ChemistryPhotopolymerization techniques and applications