Materials Literature
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Pyrenoids of 6 diatoms, Acnanthes minutissima, Cyclotella meneghiniania, Cymbella affinis, Gomphonema parvulum, Nitzschia sp., and Surirella ovalis, were examined comparatively with the electron microscope. All except those of G. parvulum were membrane‐limited. The pyrenoid membrane forms a ridge around the pyrenoid o…
The properties of TaS3, TaSe3 and TaTe4 have been studied by means of X-ray diffraction, density and magnetic susceptibility measurements: TaS3 crystallizes orthorhombic with TaSe3 crystallizes monoclinic with TaTe4 crystallizes tetragonal with The compounds have diamagnetic susceptibilities.
Abstract Während durch extrem scharfes Abschrecken dünner Schichten von geschmolzenem Bi 2 O 3 das bei Zimmertemperatur metastabile β‐BiO 1,50 hergestellt werden kann, entstehen durch Umsetzung von Bi oder Bi 2 O 3 + C im Graphit‐Schiffchen mit Sauerstoff ≥ 800°C Präparate der Zusammensetzung β‐BiO > 1,50 . Die Pha…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTKinetics of the Copper-Ferric Chloride Reaction and the Effects of Certain InhibitorsW. H. Burrows, C. T. Lewis Jr., D. E. Saëre, and R. E. BrooksCite this: Ind. Eng. Chem. Process Des. Dev. 1964, 3, 2, 149–159Publication Date (Print):April 1, 1964Publication History Publish…
The effects of package dimensions, structure, and density on the flow of air and water through yarn packages have been investigated. Packages are considered as homogeneous porous bodies, and the experimental results are correlated by theoretical relationships based on Darcy's law and the Kozeny–Carman equation. The pa…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUrethane Elastomers Containing Disulfide and Tetrasulfide LinkagesG. D. T. Owen, W. J. MacKnight, and A. V. TobolskyCite this: J. Phys. Chem. 1964, 68, 4, 784–786Publication Date (Print):April 1, 1964Publication History Published online1 May 2002Published inissue 1 April 196…
The magnetic susceptibility of Eu2O3 has been studied as a function of temperature between 300° and 1300°K. The results can be satisfactorily explained by the Van Vleck theory of paramagnetism with Judd's energy levels of free Eu3+ ions.
The phase relations in the system U02‐U03‐Yz03, particularly in the Y203‐rich region, were examined by X‐ray and chemical analyses of reacted powders heated at temperatures up to 1700°C in H 2 , CO 2 ‐CO 2 and air. Four phases were identified in the system at temperatures between 1000° and 1700°C: U308, face‐centered…
Abstract Heat capacities of three chromium tellurides representing the compounds Cr 5 Te 6 and Cr 3 Te 4 with monoclinically‐deformed structures, and Cr 2 Te 3 with hexagonal structure were determined over the range from 5 to 350°K. Values of the heat capacities, enthalpy functions, and entropy increments are tabulate…
The additional elastic scattering of monochromatic neutrons, wavelength 7·5 Å, produced by irradiating a sample of AGXP graphite to a dose of 6 × 1019 fast neutrons/cm2 at 30°C has been measured as a function of the scattering angle. If we make the reasonable assumptions that equal concentrations of vacancies and inte…
The infrared spectrum of ammonia adsorbed on porous glass at 20 °C and 150 °C has been studied in the region 1450–4000 cm −1 . No absorption band due to the asymmetric bending mode of ammonia was observed but in the NH stretching region, bands occurred at 3280 cm −1 , 3320 cm −1 , 3365 cm −1 , and 3400 cm −1 . The ban…
Kinetics of the two-stage dehydration of CaSO 4• 2H 2 O have been examined under controlled water vapor pressures up to one atmosphere. For both stages water vapor initially accelerated the rate of dehydration and subsequently retarded it. Separate, temperature-dependent water vapor pressures were noted above which ea…
Journal Article Sulphur Bacteria in Relation to Corrosion Get access G. H. Booth G. H. Booth National Chemical Laboratory, Teddington, Middlesex, England Search for other works by this author on: Oxford Academic Google Scholar Journal of Applied Bacteriology, Volume 27, Issue 1, 1 April 1964, Pages 174–181, https://do…
Hardening by gamma irradiation was investigated in eleven alkali halides with the rocksalt structure. The linear dependence of the flow stress upon the one-half power of the F-center concentration, as previously observed in LiF and KCl, was also observed in these new substances. (The earlier experiments showed that th…
Lamellar thickness, melting temperature, and density were measured for bulk polyethylene crystallized by the application of a fixed pressure to molten polymer at different temperatures. Melting temperature varied from 135.2° to 139.2°C, and density varied from 0.9759 to 0.9842 g/cc. Small-angle x-ray diffraction yield…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTPreparation and Properties of Sodium and Potassium Molybdenum Bronze CrystalsA. Wold, W. Kunnmann, R. J. Arnott, and A. FerrettiCite this: Inorg. Chem. 1964, 3, 4, 545–547Publication Date (Print):April 1, 1964Publication History Published online1 May 2002Published inissue 1…
Previous work has shown that three factors largely determine the handle of suiting materials. The present paper describes similar work on lingerie and dress fabrics and summarizes the previous work on suiting fabrics. Smoothness, stiffness, and thickness account for most of the differences in handle in all the fabrics…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRelaxation of Disulfide and Tetrasulfide PolymersA. V. Tobolsky, W. J. MacKnight, and M. TakahashiCite this: J. Phys. Chem. 1964, 68, 4, 787–790Publication Date (Print):April 1, 1964Publication History Published online1 May 2002Published inissue 1 April 1964https://pubs.acs.…
The thermal dilatation of VO 2 has been measured on ceramic samples from room temperature to 95°C, in connection with Mott's consideration which interpretes the non-metal to metal transition observed in some transition metal oxides as an effect of contraction of lattice spacings. A discontinuous volume expansion was u…
The oxidation‐reduction equilibrium between ferrous and ferric iron in Na 2 O · 2Si0 2 glass melts was studied by equilibrating melts with various oxygen partial pressures. Exceedingly long equilibration times were required to obtain meaningful results. The reaction appears to be diffusion‐controlled and may be expres…