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  • Inorganic Chemistry  (765)
  • Physics  (504)
  • Life and Medical Sciences  (370)
  • Humans
  • 2015-2019
  • 1975-1979  (1,863)
  • 1950-1954
  • 1978  (1,863)
Collection
Keywords
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  • 2015-2019
  • 1975-1979  (1,863)
  • 1950-1954
Year
  • 1
    Electronic Resource
    Electronic Resource
    NMR study of diffusion of butane in linear polyethylene (1978)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 16 (1978), S. 1399-1407 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The diffusion coefficient of butane in linear polyethylene at room temperature as a function of the vapor pressure of butane was measured by the spin-echo method with a pulsed magnetic field gradient. For the Special morphology of randomly oriented stacks of parallel lamellas the detour factor is 1/3. As long as the blocking factor and migration through the lamellas can be neglected, the local diffusion coefficient Da of the small molecules through the amorphous layers in the direction parallel to the lamellas is three times the apparent diffusion coefficient D derived from the decay of the amplitude of the spin echo under the assumption of an infinitely extended homogeneous medium. The diffusion coefficient and the spin-spin relaxation time both increase exponentially with increasing pressure, i.e., butane concentration in the polymer, while the spin-lattice relaxation time is pressure independent and seems to be determined by interaction with the amorphous polyethylene matrix.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1978.180160806
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  • 2
    Electronic Resource
    Electronic Resource
    Über TlPd3O4 und TlPt3O4 - ternäre Platinmetalloxide mit Käfigstruktur (1978)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 443 (1978), S. 11-18 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: TlPd3O4 and TlPt3O4 - Ternary Platinum Metal Oxides with Cluster StructureThe crystal structure of the cardinal red oxide TlPd3O4, prepared by the reaction of Pdo with TlNO3 or Tl2O3 at 550°C, has been determined on powder samples by X-ray and neutron diffraction. The structure of the cubic compound (a = 959.6(2) pm; space group Fm3m; Z = 8) contains square-planar PdO4 units which are joined to a three dimensional skeleton by triply bonding oxygen atoms. The cubic and rhombicuboctahedral spaces are occupied by TlIII and TlI cations so that the compound can be formulated as a mixed valency thallium(III)-thallium(I)-oxopalladate(II). The relationship with the structure of the platinum bronzes is discussed.The analogous ternary platinum oxide TlPt3O4 (a = 966.3(2)pm) has been obtained by thermal decomposition of Tl2Pt2O7.
    Notes: Die Kristallstruktur des durch Umsetzung von Pdo mit TlNO3 bzw. Tl2O3 bei 550°C erhaltenen kardinalroten Oxides TlPd3O4 wurde durch Röntgen-und Neutronenbeugung an Pulverproben aufgeklärt. In der Struktur der kubischen Verbindung (a = 959,6(2) pm; Raumgruppe Fm3m; Z = 8) sind quadratisch planare Pdo4- Baugruppen über dreibindige O- Atome zu einem dreidimensionalen Netz verknüpft. Die würfelförmigen und rhombendodekaedrischen Hohlräume des Gerüstes sind von TlIII-bzw. TlI-Kationen besetzt, so daß die Verbindung als valenzgemischtes Thallium (III)-thallium(I)-oxopalladat(II) formuliert werden kann. Die Verwandtschaftsverhältnisse zu den Strukturen der Platinbronzen werden diskutiert.Das entsprechende Oxoplatinat TlPt3O4 (a = 966,3(2) pm) konnte durch thermische Zersetzung von Tl2Pt2O7 erhalten werden.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19784430102
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  • 3
    Electronic Resource
    Electronic Resource
    Analysis of the equations of state of polyolefin melts in terms of the simha-somcynsky hole theory (1978)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 16 (1978), S. 1491-1498 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Pressure-volume-temperature data on melts of low-density polyethylene, polypropylene (PP), poly(butene-1) (PBT), and poly(4-methylpentene-1) (PMP) previously reported by us have been evaluated in terms of the Simha-Somcynsky hole theory of polymeric liquids by a determination of the reducing parameters P*, V*, and T* for each system. Literature data on the reducing parameters of linear polyethylene and of a branched polyethylene of intermediate density are also considered. Agreement with theory is best for the polyethylenes and deteriorates markedly in the series PBT:PP:PMP. These higher polyolefins have very low values of P*, thus suggesting a deficiency of the Simha-Somcynsky theory at high reduced pressures P̃ = P/P*. In these polyolefins, systematic variations of the reducing parameters (and molecular parameters derived therefrom) are noted and discussed. Correlations found previously between T* and the moleculer weight M0 of the effective segment of the theory or its hard-core volume M0V* are obeyed by the polyethylenes only. The higher polyolefins show serious deviations from these correlations.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1978.180160813
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  • 4
    Electronic Resource
    Electronic Resource
    Specific volume of polysulfone as a function of temperature and pressure (1978)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 16 (1978), S. 1261-1275 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The pressure-volume-temperature (PVT) properties of a commercial polysulfone derived from bisphenol A and 4,4′-dichlorodiphenylsulfone are studied experimentally and theoretically in the temperature range 30-370°C and for pressures to 2000 kg/cm2. PVT surfaces are determined for an annealed glass, formed under zero pressure, and for the melt. Two glass-transition lines must be distinguished: T*g(P) which is the intersection of the glass and melt PVT surfaces, and Tg(P), which is obtained by pressurizing the melt isothermally. The application of Ehrenfest-type equations to these transitions are discussed. The Prigogine-Defay ratio r = ΔkΔCp/T*gV*g(Δα)2 at P = 0 is found to be equal to 0.95 (±20%), using ΔCp data determined on identical samples. The melt data is compared with the Simha-Somcynski hole theory, using the reducing parameters V* = 0.788 cm3/g, T* = 12,560°K, P* = 10,875 bar. The hole fraction appearing in the theory is found to be constant along T*g(P), but the glass PVT relationship cannot be reproduced by using the Simha-Somcynsky theory together with the assumption that the hole fraction remains constant in the glass. At P = 0 the hole fraction must be allowed to decrease with decreasing temperature, but at a slower rate than in the melt.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1978.180160709
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  • 5
    Electronic Resource
    Electronic Resource
    Study of latex film structure by radiothermoluminescence (1978)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 16 (1978), S. 427-430 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Radiothermoluminescence has been used to show that the surface of latex globules in nonvulcanized latex films contain segments which become mobile at a temperature 20°K below that observed in bulk polymer. Vulcanization in latex films takes place mainly on the surfaces of the latex globules; vulcanized latex films are microheterogeneous systems.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1978.180160306
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  • 6
    Electronic Resource
    Electronic Resource
    biuz aktuell (1978)
    Weinheim : Wiley-Blackwell
    Biologie in unserer Zeit 8 (1978), S. 192-193 
    Details
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/biuz.19780080608
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  • 7
    Electronic Resource
    Electronic Resource
    Das große Buch der Meeresmuscheln: Schnecken und Muscheln der Weltmeere. Von P. Dance. Deutsche Übersetzung und Bearbeitung Rudo von Cosel. Verlag Eugen Ulmer, Stuttgart. 304 Seiten, 1520 Farbfotos und 73 Zeichnungen. Kunststoff mit Schutzumschlag (Großformat). DM 88, -  (1978)
    Weinheim : Wiley-Blackwell
    Biologie in unserer Zeit 8 (1978), S. 127-127 
    Details
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/biuz.19780080413
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  • 8
    Electronic Resource
    Electronic Resource
    Allgemeine Zoologie. Begründet von A. Kühn, neubearbeitet von Prof. Dr. E. Hadorn und Prof. Dr. R. Wehner, Zürich. 19., überarbeitete und erweiterte Auflage, 1974. 553 Seiten, 285 Abbildungen. Georg Thieme Verlag, Stuttgart. Gemeinschaftsausgabe mit dem Deutschen Taschenbuch Verlag München. Format 12 × 19 cm. Flexibles Taschenbuch. DM 15,80 (1978)
    Weinheim : Wiley-Blackwell
    Biologie in unserer Zeit 8 (1978), S. 32-32 
    Details
    ISSN: 0045-205X
    Keywords: Life and Medical Sciences
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/biuz.19780080109
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  • 9
    Electronic Resource
    Electronic Resource
    Neue 1,3,2,4-Diazadiphosphetidine (1978)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1180-1194 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New 1,3,2,4-DiazadiphosphetidinesThe 1,3,2,4-diazadiphosphetidines 5a-f are easily prepared by the reaction of chlorobis(dialkylamino)phosphanes with sodium bis(trimethylsilyl)amide. Further oxidation reactions by O2, S8, N3Si(CH3)3, and alkyl halides are tested in detail in the case of 5a. As shown by NMR spectroscopy, 5a-f are obtained from synthesis almost exclusively as cis isomers which on thermal treatment form a mixture of cis and trans isomers. Methoiodide adducts 9a-f show this isomerisation as well.
    Notes: Die Reaktion von Chlorbis(dialkylamino)phosphanen mit Natrium-bis(trimethylsilyl)amid eröffnet einen bequemen Weg zu den 1,3,2,4-Diazadiphosphetidinen 5a-f, deren Erst- und Zweitoxidation durch O2,S8, N3Si(CH3)3 und Alkylhalogenide am Beispiel von 5a ausführlicher untersucht wird. 5a-f fallen bei der Darstellung fast ausschließlich als cis-Isomere an, die thermische Behandlung führt  -  wie NMR-spektroskopisch gezeigt wird  -  zu einem cis-trans-Isomerengemisch. Auch die Methoiodide 9a-f zeigen cis-trans-Isomerisierung.
    Additional Material: 6 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19781110336
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  • 10
    Electronic Resource
    Electronic Resource
    1,2,7-Azadiphosphepine  -  neue Phosphor und Stickstoff enthaltende Heterocyclen (1978)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 111 (1978), S. 1655-1658 
    Details
    ISSN: 0009-2940
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: 1,2,7-Azadiphosphepines  -  New Phosphorus and Nitrogen Containing Heterocycles1 reacts with 2 moles of 2 to give the bicyclic compound 3 containing the new 1,2,7-azadiphosphepine ring system. Diphosphinoamines 5 can be considered as three-membered segments of the eight-membered ring system 1. Thus the amines 5 react with 2 likewise to give monocyclic 1,2,7-azadiphosphepines 6.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19781110448
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