Materials Literature
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Effect of pressure on the CuAu alloy having a long period ordered structure has been studied using mainly a tetrahedral-anvil type press. The alloy was annealed at various temperatures ranging from 350°C to 500°C during application of pressure. After temperature and pressure were reduced to ambient ones, the structure…
Single crystals of Pb3GeO5 were grown from the melt by the Czochralski technique. Based on observations of the domain structure under mechanical stress, and the presence of an SHG signal, the crystals are ferroelastic and possibly ferroelectric, but show no phase transitions up to the melting point (738°C). The powder…
Thermal stabilities of mature insoluble collagen, salt-precipitated fibrils of acid-soluble collagen and acid-soluble collagen in solution were compared as a function of acid pH. Both insoluble and precipitated collagens showed large parallel destabilization with decrease in pH, whereas the intrinsic stability of indi…
Differential cross sections for the elastic scattering of $\ensuremath{\alpha}$ particles by $^{208}\mathrm{Pb}$ have been measured over the laboratory energy range 16.0 to 25.5 MeV in 0.5-MeV steps and over the laboratory angle range of 30 to 170\ifmmode^\circ\else\textdegree\fi{} in 5\ifmmode^\circ\else\textdegree\f…
This paper outlines the development of a general macroscopic failure theory. The result is a relatively simple cubic equation where interaction coefficients for tension-tension and compression-compression strengths may be defined separately. Approximations for biaxial and triaxial normal stress interactions are includ…
The yarn torque developed by the applied tension in the torsion-balance apparatus described in Part 1 of this series is calculated by using an expression derived in an earlier paper. Differences in shape of net-torque–twist curves are studied for nylon monofilaments and model plied yarns; these differences in shape ar…
The transmission of monochromatic light through the sandwich cell of MBBA (a typical n -type liquid crystal) with vertical alignment is investigated. When the cell is set in crossed Nicol and controlled by a.c. voltages, the transmissivity is zero at any voltage V below the threshold value V th . When V > V th , it sh…
Abstract Poly(ethylene terephthalate) oxidizes on heating at 300°C in an air stream. Various literature has cited crosslinking under such conditions through a butanetriol or a biphenyltricarboxylic acid. In this study gelled polymer was found to contain the latter trifunctional compound, but not the former. In additio…
When Byssochlamys is grown for production of ascospores, some of the asci break up into their constituent ascospores, whereas others do not. For heat resistance studies, it is desirable to prepare a uniform suspension of free ascospores. This was accomplished with the aid of a pressure cell, from which a suspension of…
Abstract The Raman spectrum of orthorhombic sulphur has been measured in the frequency range 0‐100 cm −1 for all polarisations. The A 1 g ( zz ) and B 1 g ( xy ) spectra have been clarified by later subtraction of unwanted scattering belonging to other polarisations. Definite assignments are made for all but one A 1 g…
The combined effect of film thickness and grain size diameter on the temperature coefficient of resistance of a uniform continuous polycrystalline metal film of thickness greater than the intrinsic mean free path has been theoretically investigated. It has been found that the value of the temperature coefficient of re…
Abstract The mechanical properties of gelatin films were studied in relation to the effect of water, and compared with those of collagen films. The S‐shaped sorption isotherm was separated into an adsorption curve C 1 and dissolution curve C 2 . From the C 2 curve, the interaction parameter χ 1 of Flory–Huggins' equat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis of superstoichiometric poly(carbon monofluoride)R. J. Lagow, R. B. Badachhape, J. L. Wood, and J. L. MargraveCite this: J. Am. Chem. Soc. 1974, 96, 8, 2628–2629Publication Date (Print):April 1, 1974Publication History Published online1 May 2002Published inissue 1 A…
Abstract The photostabilizing effect of six Ni(II) chelates in films of polystyrene is compared with their efficiency in quenching triplet benzophenone and a correlation between the two established. In both polymer stabilizing and triplet quenching experiments, the diamagnetic chelates are more effective than the para…
Abstract Brillouin scattering of laser light has been used to study the temperature dependence of phonon velocity in a variety of amorphous polymeric systems, particularly internally and externally plasticized methacrylates. Discontinuities in the temperature coefficient of the hypersound velocities are observed at th…
The thermal conductivity vs temperature relation in deformed germanium single crystals is measured in the temperature range from 1.5 to 30 K. The results are analysed on the basis of the Callaway model. Klemens' theory on the scattering of phonons due to the static strain field of dislocations accounts for the experim…
Abstract The soils of the summit region of Mauna Kea are similar to the soils of the high mountain deserts and to the soils of cold deserts. Dramatic differences, however, exist between the soils of the summit and other neighboring cones and the soils of the glaciated terrain. The soils of some of the cones of the sum…
Two methods of calculation of indicatrices of diffuse X-ray scattering by globular proteins in a medium with a non-zero electron density are described. The methods are used in calculation of curves of scattering by sperm whale native myoglobin in different solvents. The indicatrices obtained are close to the experimen…
Article Notizen: Die Kristalldaten der Goldhalogenide AuBr3 und AuCl / The Lattice Parameters of the Gold Halogenides AuBr3 and AuCl was published on April 1, 1974 in the journal Zeitschrift für Naturforschung B (volume 29, issue 3-4).
Algal and fungal microfossils recovered from the type area of Matanomadh Formation (Palaeocene), in the district of Kutch, Gujarat have been described. The assemblage comprises 20 genera and 27 species. Out of these, 10 genera and 13 species belong to algae and 10 genera and 14 species belong to fungi. Of the algae, L…