THE PHYSICAL PROPERTIES OF SKIN IN CUTIS LAXA
RODNEY GRAHAME, PETER BEIGHTON; THE PHYSICAL PROPERTIES OF SKIN IN CUTIS LAXA, British Journal of Dermatology, Volume 84, Issue 4, 1 April 1971, Pages 326–
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Temporary and Permanent Fiber-Friction Increases Induced by Corona Treatment
"Frictionizing" textile fibers by corona treatment produces larger effects than conventional chemical methods. A marked increase in wool fiber friction occurs, both with and against the scales. For wool, the increase in with-scale fric tion decays slowly with time after treatment; against-scale friction does not. Init…
A High Resolution Spectrometer for the Shorter Millimeter Wavelength Region
A description is given of a molecular beam apparatus which extends high resolution absorption spectroscopy into the shorter millimeter wavelength region (up to 500 GHz). A parallel-plate-type absorption cell, allowing for Stark modulation, is used with the molecular beam passing between the plates. The half-width of t…
Molecular Orbital Calculation for Trigonally Distorted Octahedral Complexes
A perturbed ligand molecular orbital (PLMO) method is presented for the calculation of magnetic ion properties in diamagnetic cubic lattices at a site having trigonal (C3i) symmetry. Expressions for the anisotropic orbital reduction factors k‖ and k⊥ and spin–orbit coupling constants ζ‖ and ζ⊥ are derived in terms of…
Kinetic studies of permanganate oxidation reactions. III. Reaction with tris(1,10-phenanthroline)iron(II)
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetic studies of permanganate oxidation reactions. III. Reaction with tris(1,10-phenanthroline)iron(II)John R. Sutter and Kenneth W. HicksCite this: J. Phys. Chem. 1971, 75, 8, 1107–1113Publication Date (Print):April 1, 1971Publication History Published online1 May 2002Pub…
Selected thermodynamic values and phase diagrams for copper and some of its binary alloys
Abstract : Selected values of the thermodynamic properties of copper and thirty-one of its binary alloys are presented. Selections have been made by testing experimental data for self-consistency, consistency with known thermodynamic relationships, with the phase diagram, and with other measurements on the same system…
Low Temperature Heat Capacities of Transition Metal Borides
Abstract Low temperature heat capacities from 1.5 to 15 K have been measured for a number of transition metal borides with the compositions Me 2 B, MeB and MeB 2 , and their solid solutions. The measurements show that the borides are characterized by a narrow d-band with a relatively large density of electron states.…
Studies of surface reactions of nitric oxide by isotope labeling. II. Deuterium kinetic isotope effect in the ammonia-nitric oxide reaction on a supported platinum catalyst
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStudies of surface reactions of nitric oxide by isotope labeling. II. Deuterium kinetic isotope effect in the ammonia-nitric oxide reaction on a supported platinum catalystKlaus Otto, Mordecai Shelef, and Joseph T. KummerCite this: J. Phys. Chem. 1971, 75, 7, 875–879Publicat…
Polyimides based on pyrazinetetracarboxylic dianhydride and some related model compounds
Abstract A study was made of polyimides based on pyrazinetetracarboxylic dianhydride (PTDA) plus heterocyclic diamines different from the one previously reported by Hirsch. It was postulated that thermal properties might be improved if the diamine portion did not contain the N–N linkage. The results indicate that thes…
Absolute Total Cross Sections for the Scattering of Low-Energy Electrons by Rubidium, Cesium, and Potassium
Using the atom-beam recoil technique, absolute total cross sections were measured for the scattering of electrons in the energy range 0.3-9 eV by potassium, rubidium, and cesium. The results of these measurements are in substantial disagreement with the experimental values of Brode, obtained more than 40 years ago. On…
Elektronenmikroskopische untersuchung der versetzungsanordnung verformter kupfereinkristalle im belasteten zustand
Copper single crystals orientated for single glide were deformed in tension at 78°K and irradiated before load-removal with fast neutrons at 4°K or 20°K. The dislocation arrangement which was thus stabilized in the stress-applied state was investigated extensively by transmission electron microscopy and compared with…
Raman Spectrum and Polymorphism of Titanium Dioxide at High Pressures
Raman spectra of the rutile and high-pressure orthorhombic (TiO2 II) phases of titanium dioxide have been studied at pressures as high as 40 kbar. The frequency of the B1g mode of rutile has an unusual negative pressure dependence, dυ / dp = − 0.3 ± 0.1 cm−1·kbar−1. Onset of the rutile:TiO2 II transition is observed a…
Investigation of Nitric Oxide Formation Kinetics in Combustion Processes: The Hydrogen-Oxygen-Nitrogen Reaction
An experimental and analytical investigation of the kinetics of formation of NO in shock-induced combustion of hydrogen-oxygen-nitrogen mixtures has been carried out. In the experimental study, concentration lime-histories of NO, OH and H20 were measured during reaction using spectroscopic techniques. Experimental con…
The Liquid Crystalline Properties of Alkyl, Aryl and Arylalkyl 4-p-Substitutedbenzylideneamino-cinnamates and α-methylcinnamates
Five homologous series (methyl to n-decyl) of n-alkyl 4-p-substituted-benzylideneaminocinnamates with p-substituents = CN2, NO2, MeO2 MeCO.O and Ph have been prepared and the liquid crystalline properties established. The relative thermal stabilities of the mesophases of the esters with different p-substituents are in…
A High Resolution Electron Spectrometer for Use in Transmission Scanning Electron Microscopy
The design and construction of a double focusing uniform field magnetic electron spectrometer are described. The pole pieces of the magnet are curved in an effort to correct all median plane aberrations and thereby increase the collecting power. The spectrometer has been installed on a scanning microscope which uses a…
The Development of Terrain Following Radar
ATTACKING aircraft in the first world war used to fly in low, drop their bombs by hand over the cockpit side and be considered unlucky if a rifle bullet came anywhere near them.
Surface Phenomena on Rhodium-Platinum Gauzes
The rare occurrence of inactive catalyst gauzes for no obvious reason has led to comparative studies of the structures of rhodium-platinum wires from both active and inactive gauzes. Active gauzes showed the regular development of octagonal crystal faces on the nodular growths on the wires. Inactive gauzes showed no c…
Absorption and Scattering Losses in Glasses and Fibers for Light Guidance
Fiber optics for telecommunications applications require very high purity glass. Light loss in glass results primarily from absorption and scattering. Transition metal ions and OH ions cause most of the absorption, whereas scattering is caused by microheterogeneity. Scattering losses vary from 1 to 4 dB/km at 850 nm;…
Analysis of the 3-Tube Symmetrical Electrostatic Unipotential Lens
The 3-tube symmetrical electrostatic unipotential lens was analyzed in great detail. Starting from a mathematical expression for the axial potential distribution, the cardinal points and coefficients of spherical and chromatic aberration were obtained with the help of a digital computer. Values for S/R, the separation…
Ignition Temperatures of Metals in Oxygen Atmospheres
The ignition temperature of ten common non-toxic metals has been determined experimentally in an oxygen environment. In this investigation a induction furnace facility that emphasized the pre-ignition surface oxidation effects upon the ignition temperature was used. The bulk ignition temperatures of barium, bismuth, c…