D. C. Bassett、F. C. Frank、A. Keller1963-10-01Philosophical magazine
The obliquity of the fold surfaces of monolayer polyethylene crystals was investigated quantitatively. Two crystal types were used: (a) true lozenges formed at 76°c (high supercooling) previously observed as corrugated; (b) truncated lozenges formed at 90°c (low supercooling) previously observed as hollow pyramidal. Q…
Polymer crystallization and propertiesPolymer Nanocomposites and PropertiesRheology and Fluid Dynamics Studies
Manfred Voigt1963-10-01Journal of the Royal Microscopical Society
SYNOPSIS After some general remarks concerning the interpretation of certain structural markings of Mastogloia , which have hitherto often been neglected, but which must now be considered as being of value in separating otherwise similar species, some new Mastogloia are described, in the first part from collections ma…
Genomics and Phylogenetic StudiesProtist diversity and phylogenyDiatoms and Algae Research
Adi Eisenberg1963-10-01The Journal of Chemical Physics
A previously derived theory of equilibrium polymerization is generalized to take into account the effect of superposed hydrostatic pressure, and the results are applied to the equilibrium polymerization of sulfur. It is shown that the transition which at atmospheric pressure occurs at about 160°C is shifted with press…
Polymer crystallization and propertiesAdvanced Physical and Chemical Molecular InteractionsThermal and Kinetic Analysis
J. B. Birks、John H. Appleyard、Rosalind Pope1963-10-01Photochemistry and Photobiology
Abstract— Ultra‐violet irradiation of deoxygenated solutions of anthracene, tetracene or pentacene causes the disappearance of the polyacene absorption spectrum and the appearance of an absorption spectrum which is attributed to the photo‐dimer of the polyacene. Molecular structures for ditetracene and dipentacene are…
Analytical Chemistry and ChromatographyPhotochemistry and Electron Transfer StudiesPhotochromic and Fluorescence Chemistry
E. Nakamura、Toshio Mitsui、Jiro Furuichi1963-10-01Journal of the Physical Society of Japan
It has been tried to classify newly discovered ferroelectrics as well as old ones according to their Curie-Weiss constants. Results have suggested that the displacive type ferroelectrics are not necessarily oxide crystals, and have also shown that small Curie-Weiss constants are not very rare in new ferroelectrics. Cl…
High-pressure geophysics and materialsSolid-state spectroscopy and crystallographyThermodynamic and Structural Properties of Metals and Alloys
T. Vasilos、R. M. SPRIGGS1963-10-01Journal of the American Ceramic Society
Pressure sintering (or hot‐pressing) of pure alumina and magnesia in graphite dies and in ceramic dies over the range 1100° to 1700°C and 4000 to 10,000 psi has been shown to be very useful in fabricating these materials with controlled microstructures (e.g., very high relative density and fine grain size or controlle…
Advanced ceramic materials synthesisAluminum Alloys Composites PropertiesIntermetallics and Advanced Alloy Properties
M. O’Keeffe1963-10-01The Journal of Chemical Physics
The transmission and reflection spectra of cuprous oxide have been measured from 2 to 25 μ. The transmission studies included Cu2O18. The isotope shifts help to establish that all the observed infrared bands are due to lattice vibrations and not to defect mechanisms as some authors have suggested. The reflectivity can…
ZnO doping and propertiesCopper-based nanomaterials and applicationsStrong Light-Matter Interactions
Joshua Jortner、Sang‐Il Choi、Joseph Katz 等 4 位作者1963-10-01Physical Review Letters
Triplet energy migration and triplet-triplet annihilation leading to fluorescence radiation are discussed. The molecular crystals considered are arthracene and naphthalene. Conclusions concerning the mechanism of the triplettriplet annihilation, the recombination of the ion pair, and the rate- determining step in the…
Nonlinear Optical Materials ResearchLuminescence and Fluorescent MaterialsSolid-state spectroscopy and crystallography
G. M. Bower、L. W. Frost1963-10-01Journal of Polymer Science Part A General Papers
Abstract Aromatic polyimides were prepared in two steps. Pyromellitic dianhy dride was added to a solution of an aromatic diamine in a highly polar solvent, such as dimethylformamide, dimethylacetamide, dimethyl sulfoxide, or N ‐methyl‐2‐pyrrolidone, until a high molecular weight polypyromellitamic acid was obtained.…
Synthesis and properties of polymers
R. L. Comstock、R. C. LeCraw1963-10-01Journal of Applied Physics
A calculation is presented of the generation of microwave elastic waves by the uniform precession resonance in ferromagnets. The excitation of the thickness shear modes in a normally magnetized ferromagnetic disk is treated. For uniform precession the elastic modes are driven only on the surfaces of the disk. The effe…
Magnetic Properties and Synthesis of FerritesMagnetic Properties and ApplicationsMagneto-Optical Properties and Applications
Melvin J. Hatch、Joseph Dillon1963-10-01Industrial & Engineering Chemistry Process Design and Development
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTAcid Retardation. Simple Physical Method for Separation of Strong Acids from Their SaltsM. J. Hatch and J. A. DillonCite this: Ind. Eng. Chem. Process Des. Dev. 1963, 2, 4, 253–263Publication Date (Print):October 1, 1963Publication History Published online1 May 2002Published…
Crystallization and Solubility Studies
E. F. Riebling1963-10-01The Journal of Chemical Physics
An improved counterbalanced sphere viscometer was used to determine the viscosity of pure molten GeO2 at temperatures from 1470° to 1720°C. This data agrees with the Kurkjian and Douglas data obtained below 1500°C. Activation energy and entropy calculations suggest a gradual thermal breakdown of molten GeO2 compared t…
Zeolite Catalysis and SynthesisGlass properties and applicationsMicrowave Dielectric Ceramics Synthesis
J. D. Mackenzie1963-10-01Journal of the American Ceramic Society
The annealing or volume variation with time of both silica and boron oxide glasses densified in the rigid state was studied. Appreciable annealing of silica glass was observed at temperatures as low as 200°C and of boron oxide glass at even room temperature. This anomalous volume flow depended on temperature, time, an…
High-pressure geophysics and materialsMaterial Dynamics and PropertiesGlass properties and applications
Evan Baltazzi、Lewis I. Krimen1963-10-01Chemical Reviews
ADVERTISEMENT RETURN TO ISSUEPREVArticleRecent Advances in the Chemistry of Pyrrole.Evan Baltazzi and Lewis I. KrimenCite this: Chem. Rev. 1963, 63, 5, 511–556Publication Date (Print):October 1, 1963Publication History Published online1 May 2002Published inissue 1 October 1963https://pubs.acs.org/doi/10.1021/cr60225a0…
Porphyrin and Phthalocyanine Chemistry
Elizabeth B. Brackett、Thomas E. Brackett、Ronald L. Sass1963-10-01The Journal of Physical Chemistry
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE CRYSTAL STRUCTURES OF BARIUM CHLORIDE, BARIUM BROMIDE, AND BARIUM IODIDEElizabeth B. Brackett, Thomas E. Brackett, and Ronald L. SassCite this: J. Phys. Chem. 1963, 67, 10, 2132–2135Publication Date (Print):October 1, 1963Publication History Published online1 May 2002Pub…
Crystallization and Solubility Studies
J. D. Mackenzie1963-10-01OpenAlex
Densification of SiO 2 , GeO 2 , and B 2 O 3 glasses in the rigid state was studied at pressures up to 80 kb and at temperatures up to 600°C in different pressure‐transmitting media. The infrared, ultraviolet, and nuclear magnetic resonance absorptions of the compressed glasses were examined. Densification increased w…
Material Dynamics and PropertiesGlass properties and applicationsPhase-change materials and chalcogenides
Robert J. Hardy1963-10-01OpenAlex
A systematic derivation of the energy-flux operator for a three-dimensional lattice is given. The treatment is based on the general expressions for the energy flux which are valid for all phases of matter; a short derivation of these expressions, making no restrictions to two-body forces, is presented. The average ene…
Thermal properties of materialsMechanical and Optical ResonatorsQuantum, superfluid, helium dynamics
W. A. Zisman1963-10-01OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTINFLUENCE OF CONSTITUTION ON ADHESIONW. A. ZismanCite this: Ind. Eng. Chem. 1963, 55, 10, 18–38Publication Date (Print):October 1, 1963Publication History Published online1 May 2002Published inissue 1 October 1963https://pubs.acs.org/doi/10.1021/ie50646a003https://doi.org/10…
Surface Modification and SuperhydrophobicityAdhesion, Friction, and Surface InteractionsMechanical stress and fatigue analysis
N. Laine、F.J. Vastola、P.L. Walker1963-10-01OpenAlex
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTHE IMPORTANCE OF ACTIVE SURFACE AREA IN THE CARBON-OXYGEN REACTION1,2N. R. Laine, F. J. Vastola, and P. L. Walker Jr.Cite this: J. Phys. Chem. 1963, 67, 10, 2030–2034Publication Date (Print):October 1, 1963Publication History Published online1 May 2002Published inissue 1 Oc…
Catalytic Processes in Materials ScienceGas Sensing Nanomaterials and SensorsCO2 Reduction Techniques and Catalysts
R. A. Cowley1963-10-01OpenAlex
The theory of the physical properties of an anharmonic crystal is discussed by using the thermodynamic Green's functions for the phonons. A perturbation procedure is developed to obtain the Green's functions and it is shown that for some purposes a quasi-harmonic approximation is useful, in which the frequencies of th…
High-pressure geophysics and materialsAcoustic Wave Resonator TechnologiesSolid-state spectroscopy and crystallography