DIMENSIONAL STABILITY OF PLAIN-KNIT FABRICS
(1960). DIMENSIONAL STABILITY OF PLAIN-KNIT FABRICS. Journal of the Textile Institute Proceedings: Vol. 51, No. 4, pp. P200-P209.
Materials Literature
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On the Mechanism of the Lewis-Rayleigh Nitrogen Afterglow
The relative intensities in the nitrogen afterglow, from 5000 to 11 000 A, have been measured in pure nitrogen and after addition of several foreign gases. Most of the bands in the recently discovered Y — B 3Πg system are overlapped by B 3Πg — A 3Σu+ bands but intensity assignments have been made. Changes in relative…
The Dynamic Bulk Viscosity of Polystyrene and Polymethyl Methacrylate
The transverse and longitudinal wave measurement on polystyrene and polymethyl methacrylate was carried out at frequencies of 0.5, 1, and 2.25 Mc, in the temperature range 20°C to 190°C. For the transverse wave measurement, a modified rotating plate method was used. An energy-dissipating process associated with volume…
AUXOTROPHY AND HETEROTROPHY IN MARINE LITTORAL DIATOMS
Forty-four pure cultures of marine littoral diatoms (43 pennate and 1 centric) have been studied to determine (a) whether any accessory organic factors (vitamins) are essential for growth in light, and (b) whether the cells can grow in darkness using glucose, acetate, or lactate as substrates.Six isolates were shown t…
The effect of network flaws on the elastic properties of vulcanizates
Abstract A treatment is given of the effect of network flaws due to the finite chain length of the primary elastomer molecules on the elastic properties of rubber vulcanizates. In this treatment full allowance is made for the elastically inactive material which exists either as sol or as loose ends of the network. The…
Neutron Diffraction Study of the Magnetic Properties of Rare-Earth-Iron Perovskites
A neutron diffraction study has been made of the magnetic properties of the rare-earth-iron perovskites, NdFe${\mathrm{O}}_{3}$, HoFe${\mathrm{O}}_{3}$, and ErFe${\mathrm{O}}_{3}$, at temperatures ranging from 955\ifmmode^\circ\else\textdegree\fi{} to 1.25\ifmmode^\circ\else\textdegree\fi{}K. The iron ions in each of…
Effects of Double Exchange in Magnetic Crystals
This paper discusses some effects of mobile electrons in some antiferromagnetic lattices. It is shown that these electrons (or holes) always give rise to a distortion of the ground state spin arrangement, since electron transfer lowers the energy by a term of first order in the distortion angles. In the most typical c…
The reactions of oxygen at dark and irradiated zinc oxide surfaces
Abstract Studies of the kinetics of adsorption of oxygen on zinc oxide over the temperature range from 25 to 390°C have provided evidence for two distinct types of chemisorption, one prevalent below 200 and the other above 300°C. This pattern of activity has been confirmed by measurements of desorption rates over the…
Extension of the Madelung Method for the Evaluation of Lattice Sums
The Madelung formulas for the electrostatic potential of a linear or planar Bravais lattice of ions, neutralized by a uniform distribution of charge, are extended to the lattice sums over a linear or planar Bravais lattice involving two-body interactions of the type ${R}^{\ensuremath{-}n}$ ($R$, interatomic distance;…
Ferroelectric Transition in Rubidium Bisulfate
RbHS${\mathrm{O}}_{4}$ is ferroelectric below -15\ifmmode^\circ\else\textdegree\fi{}C. The room-temperature phase is monoclinic, with space group $\frac{P{2}_{1}}{c}$, $a={14.35}_{6}$ A, $b={4.62}_{2}$ A, $c={14.80}_{7}$ A, $\ensuremath{\beta}=121.0\ifmmode^\circ\else\textdegree\fi{}$ and $Z=8$. The symmetry of the fe…
Semiconducting Properties of Cubic Boron Phosphide
Received 15 February 1960DOI:https://doi.org/10.1103/PhysRevLett.4.282©1960 American Physical Society
Mechanism for the Sidewise Motion of 180° Domain Walls in Barium Titanate
An important unanswered question concerning the sidewise motion of 180\ifmmode^\circ\else\textdegree\fi{} domain walls in single crystal BaTi${\mathrm{O}}_{3}$ is the mechanism by which the boundaries move. This paper considers two possible models. One model assumes that the wall motion results from the repeated nucle…
Corrosion and Weldability Studies On Chromium-Manganese Austenitic Stainless Steels
Corrosion and weldability studies have been made on Cr-Mn-Ni and Cr-Mn-N grades of austenitic stainless steel to determine their usefulness for chemical plant applications. These studies show that the corrosion resistance of Type 202 (18% Cr-5% Ni-8% Mn-0.10% max. C) stainless steel is comparable to that of Type 304 s…
9—THE TEARING STRENGTH OF FABRICS: I. A REVIEW OF THE LITERATURE
A comprehensive survey of the literature on the tearing strength of fabrics is presented. The various test methods employed for determining tearing strength, the machines and instruments used in making these tests, and the different expressions for tearing strength are discussed. The elfccts of the type of fibre, clot…
Direct electron microscopy of thin foils of internally oxidized dilute copper alloys
(1960). Direct electron microscopy of thin foils of internally oxidized dilute copper alloys. The Philosophical Magazine: A Journal of Theoretical Experimental and Applied Physics: Vol. 5, No. 51, pp. 298-301.
Infrared spectra of crystalline polysaccharides. IV. The use of inclined incidence in the study of oriented films
Abstract The infrared spectra (tilting spectra) obtained with the incident beam inclined to oriented films are discussed. Various experimental settings for obtaining the tilting spectra are studied. It is pointed out that quantitative interpretations (to determine the direction of the transition moment of a normal mod…
Studies on Lead Titanate Ceramics Containing Niobium or Tantalum
Dielectric, lattice constant, and thermal‐expansion measurements have been made on solid solution ceramics in the systems PbTiO 3 Pb 0.5 NbO 3 and PbTiO 3 ‐Pb o.5 TaO 3 . The ferro‐electric Curie temperature is lowered to 465OC. at the solubility limit (2 to 5% Nb or Ta). Replacement of Ti 4+ by Nb 5+ or Ta 5+ in thes…
Polymerization of α‐piperidone by alkali metal and certain acyl compounds
Abstract It has been shown that the resonance‐stabilized, six‐membered lactam, α‐piperidone, is polymerized by alkali metal and acyl compounds to form poly‐5‐valeramide, melting point 259°C., [ r ] = 0.25, d = 1.243. A mechanism is proposed for the polymerization of α‐piperidone with alkali metal and acyl compound whi…
Infrared Properties of Gold in Germanium
The fundamental parameters of gold in germanium have been investigated between 60-300\ifmmode^\circ\else\textdegree\fi{}K by absorption, photoconductivity, and lifetime studies.Photoconductivity measurements reveal the following capture cross sections for electrons and holes at 80\ifmmode^\circ\else\textdegree\fi{}K (…
Stability of Dicalcium Phosphate Dihydrate in Aqueous Solutions and Solubility of Octocalcium Phosphate
Abstract The hydrolysis of dicalcium phosphate dihydrate, CaHPO 4 ·2H 2 O, in dilute phosphoric acid solutions and in water was investigated at 25° C. in the absence of CO 2 . Octocalcium phosphate, Ca 4 H(PO 4 ) 3 ·3H 2 O, was found to precipitate when the pH of the solution was higher than 6.38. The extent of the hy…