Materials Literature
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Bacteria with strongly depressed phosphoglucomutase (EC 2.7.5.1) activity are found among the mutants of Escherichia coli which, when grown on maltose, accumulate sufficient amylose to be detectable by iodine staining. These pgm mutants grow poorly on galactose but also accumulate amylose on this carbon source. Growth…
Mild alkaline extraction of native poly-beta-hydroxybutyrate (PHB) granules results in the solubilization of a protein fraction. Both the solubilized protein fraction and the extracted granules are essentially devoid of PHB synthetase activity unless recombined. The protein fraction has been separated by chromatograph…
The mean square displacement (x2) from the theoretical lattice point, obtained from X-ray structure data for myoglobin crystals, is compared with the corresponding value, (x2)T, measured by Mössbauer experiments on the iron in myoglobin crystals. (x2)T depends only on the vibrations of the lattice. The value (x2), how…
Article The crystal structures of two oligoclases : A comparison with low and high albite was published on November 1, 1971 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 133, issue 1-6).
A memory switching effect in bulk polycrystalline selenium has been investigated. I–V characteristics are related to structural changes revealed by microscopic examination, where it is shown that the switching mechanism is a crystal–amorphous phase transformation.A molten zone, produced by a direct current through the…
This study deals with the effect of tuft size and its variation on lap uniformity, carding quality, and yarn properties. Three different types of tufts (small, big, and blend) have been covered in 40s, 80s, and 30s counts from suitable cottons and staple fiber. Results of this study show that, while opening the cotton…
Dielectric properties of various types of mixtures of α-Fe 2 O 3 , TiO 2 , and Fe 2 TiO 5 are investigated. Mixtures of α-Fe 2 O 3 and Fe 2 TiO 5 , and of TiO 2 and Fe 2 TiO 5 powders respectively show the interfacial polarization. For these types of mixtures there are fairly good agreements between observed values of…
A theoretical analysis of the shear deformation of a fabric under biaxial load was carried out and the amount of twisting deformation of spherical inflated structures made from skewed fabric was calculated and compared with the twisting observed in a model structure. A device was constructed for the measurement of the…
Pitting of steel in chloride solutions was studied in an experimental cell that permitted measurement of the pH and potential at active and passive areas as well as the current flowing between the areas. The potentials could be controlled potentiostatically. When the potentials of the active and passive areas were hel…
The conditions under which the space-charge-limited current in a solid is enhanced by the Frenkel effect are discussed and the current-voltage relations are calculated analytically.
Abstract The reaction between BaCO 3 and Fe 2 O 3 in the proportions necessary for the formation of the hexaferrite has been studied in air. The decarbonation reaction was followed by measuring weight loss isothermally, the formation of hexaferrite by measurement of saturation magnetisation and by X‐ray diffractometry…
The governing partial differential equation for the distribution of orientations is obtained for nematic liquid crystals. The boundary condition for orientation at the surface of the container depends on the type of surface and the type of liquid crystal. Two extreme cases, orientation either parallel or perpendicular…
The electrochemical behavior of high purity aluminum has been studied to clarify the corrosion behavior of the metal when exposed to oxygen free and oxygen saturated saline solutions of varying pH. The mixed or corrosion potential, EM, of the electropolished high purity aluminum decreases as the pH is increased except…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTTungstovanadate heteropoly complexes. I. Vanadium(V) complexes with the constitution M6O19n- and vanadium:tungsten .leq. 1:2C. M. Flynn Jr. and M. T. PopeCite this: Inorg. Chem. 1971, 10, 11, 2524–2529Publication Date (Print):November 1, 1971Publication History Published onl…
Article Zur Abgrenzung der Koordinationssphäre und Ermittlung der Koordinationszahl in Kristallstrukturen was published on November 1, 1971 in the journal Zeitschrift für Kristallographie - Crystalline Materials (volume 133, issue 1-6).
Article Diffiisionsuntersuchung von Wasser an 13X- sowie an 4A- und 5A-Zeolithen mit Hilfe der Methode der gepulsten Feldgradienten was published on November 1, 1971 in the journal Zeitschrift für Physikalische Chemie (volume 248O, issue 1).
An apparatus has been designed and constructed to determine the effects of applied oscillatory loads on fibres. It includes a piezoelectric transducer to register the oscillatory loads on the fibre. This, combined with a strain gauge bridge system and suitable amplification, provides signals directly proportional to t…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPhase Separation in n-Hexatriacontane-n-Hexatriacontane-d74 and Polyethylene-Poly(ethylene-d4) SystemsFerdinand C. Stehling, E. Ergos, and Leo MandelkernCite this: Macromolecules 1971, 4, 6, 672–677Publication Date (Print):November 1, 1971Publication History Published online…
Efficiency factors are proposed describing the effectiveness of utilization of fibre stiffness and strength when a random distribution of extensible fibres is incorporated in a brittle matrix. A length efficiency factor for strength calculation is derived, which includes the effect of sliding friction during fibre pul…
A recently elaborated theory of the p-V-T properties successfully describes the behavior of amorphous polymers above the glass temperature. The improvement over earlier results arises from the introduction of a vacancy fraction which is obtained as a function of volume and temperature by a maximization of the partitio…