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  • Polymer and Materials Science  (37)
  • Cell & Developmental Biology  (4)
  • Industrial Chemistry  (2)
  • Fluid Mechanics and Heat Transfer
  • 1955-1959  (43)
  • 1955  (43)
Collection
Keywords
Publisher
Years
  • 1955-1959  (43)
Year
  • 1
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The dynamic moduli and loss factors have been determined for high molecular samples of GR-S and natural rubber. Comparison of the two sets of data shows that the general characteristics of the two materials are quite similar. The main differences are that GR-S shows a higher temperature for the apparent second order transition, and also a higher value for the modulus in the relatively level portion of the highly elastic region. The usual superposition procedures are used for correlating the data. Several indications that the equivalence of frequency and temperature may not be of universal applicability are noted. It is suggested that the higher elastic plateau modulus of GR-S my, in conjunction with usual levels of vulcanization, lead to a modulus dispersiion with its attendant loss and thus be a contributing factor to the lower resilience and higher heat development characteristic of GR-S.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 18 (1955), S. 479-490 
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The effect of various added simple electrolytes upon the solution viscosity of polymethacrylic acid and hydrolyzed polyacrylonitrile was studied. The viscosity behavior of these polymers in water and in the presence of added NaCl was typical of that of polyelectrolytes. The addition of multivalent anions (sulfate, diacid phosphate, oxalate, and succinate) to solutions of polymethacrylic acid decreasesd the viscosity at low added salt concentrations, but a reversal in the reduced viscosity-concentration curve was obtained as the ionic strength was increased. This increase in viscosity can be partly explained on the basis of increased ionization originating from the behavior of the added multivalent anions. However, this is not the complete explanation since the relative efficiency of these anions in increasing the viscosity is not consistent with the values of the dissociation constants. A possible alternative explanation involves the formation of associated complexes of the polyions. It is further demonstrated that the limiting intrinsic viscosities at infinite ionic strength is dependent upon the initial polymer charge.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 97 (1955), S. 511-541 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York, NY : Wiley-Blackwell
    Journal of Morphology 97 (1955), S. 543-567 
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 52-52 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 81-84 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: The Influence of the Rate of Flowing on the Precipitation of Hardnes and the so Caused Corrosion in Hot-Water-Supply-DevicesPrecipitation of the hardness of waters resulting from metall-dissolution is subject to the alkalinity of the wall. Its rate depends on the composition of the water and on the available concentration of a depolariser; in this way the rate of flowing and of diffusion. It is shown how to eliminate resulting disadvantage by suitable constructions which do not cause lower efficiency of the devices.
    Notes: Die Härteausscheidung aus Wässern als Folge einer Metallauflösung ist abhängig von der Wandalkalität. Die Höhe der Wandalkalität richtet sich nach der Wasserzusammensetzung und der Menge des in der Zeiteinheit zur Verfügung stehenden Depolarisationsmittels, also nach der Diffusionsgeschwindigkeit. Es wird gezeigt, wie durch bauliche Maß nahmen die nachteiligen Faktoren eliminiert werden können, ohne daß die Leistung der Geräte sinkt.
    Additional Material: 4 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 163-163 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 554-554 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 130-132 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Progress of the Chemical Water-Treatment Intending Increased Protection against CorrosionFiltration and washing of mechanic filters have remained the same. In accordance with the effectiveness of inhibitors protection against corrosion should be achieved by minimum-additives. The electrochemical process of metall-dissolution and those secondary reactions upon the components of the water are to be considered. Necessarily dosing appliances were improved. The efforts to regulate the amount of dissolved oxygen by new airation-methods and addition of nitrates and other oxidising agents like KMnO4, chlorine, hypochlorous acid, chlorinedioxide and so on have been continued. Simultaniously formation of very insoluble covers and just as well some advantage concerning public health should be achieved by minimum-additives of phosphates, silicates and flurides. One endeavours to govern water-treatment so that valueable traces of elements in the water will remain preserved or, if necessary, be increased or diminished.
    Notes: Die Filterung und die Spülung der mechanisch wirkenden Filter ist gleich geblieben; man bemüht sich durch chemische Minimalzusätze im Sinne der Inhibitorwirkung einen Korrosionsschutz zu erzielen, wobei man den elektrochemischen Vorgängen der Metallauflösung und den damit in Verbindung stehenden Sekundärreaktionen mit Bestandteilen des Wassers Beachtung schenkt; zwangsläufig damit ergab sich eine Verbesserung der Dosierungsvorrichtungen. Die Bestrebungen zur Regulierung der Menge des gelösten Sauerstoffs durch neue Belüftungsverfahren, Zusatz von Nitraten und anderen oxydierend wirkenden Verbindungen, wie KMnO4, Chlor, unterchlorige Säure, Chlordioxyd usw., wurden fortgesetzt. Gleichzeitig mit Minimalzusätzen an Phosphaten, Silikaten, Fluoriden usw. will man neben der Erzeugung schwerlöslicher Schutzschichten z. T. auch Vorteile auf allgemein gesundheitlichem Gebiete erreichen, und bemüht sich, die Wasseraufbereitung so zu lenken, daß wertvolle Elementspuren in Wasser enhalten bleiben, oder, wenn nötig, erhöht oder erniedrigt werden.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 6 (1955), S. 282-287 
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Acid-Resisting Steels in the Production of Wood-VinegarThe chemical wear of steel by the production of wood-vinegar is bigger than that by the production of vinegar of fermentation. It is caused by the content of homologous acids and empyreumatic substances.A steel alloyed with Cr 18%, Ni 10% and Mo 2% failed at places of biggest wear though generally used for this acetic acid. Improvement was attempted by steels of higher Cr and Ni contents. The best results were achieved by a steel alloyed with 27% of Cr, 4,5% of Ni and 1,5% of Mo which has been employed in the Swedish cellulose-industry. According to laboratory-experiments this steel is completely resistant over the whole range of concentration and temperature up to the boiling point. It consists of very little austenit and displays greater temper. Nevertheless it can be welded and worked up easily.
    Notes: Die chemische Beanspruchung in der Holzessigindustrie ist größer als die in der Gärungsfabrikation, was durch Gehalte an homologen Säuren und empyrheumatischen Stoffen bedingt ist.Ein Stahl mit 18% Cr, 10% Ni und 2% Mo, der im allgemeinen für diese Essigsäure Verwendung findet, versagte an den Stellen stärkster Beanspruchung in Holzessigsäure. Es wurde daher versucht, durch Erhöhung des Cr- und Ni-Gehaltes eine Verbesserung zu erzielen.Die besten Ergebnisse wurden mit einem bereits in der schwedischen Zellulosefabrikation verwendeten Stahl mit 27% Cr, 4,5% Ni und 1,5% Mo erreicht, der nach den Laboratoriumsversuchen im gesamten Konzentrations-Temperaturbereich bis zum Siedepunkt voll beständig ist.Dieser Stahl besteht nur zum geringen Teil aus Austenit und weist daher eine größere Härte auf. Trotzdem ist er gut verarbeitbar und läßt sich auch befriedigend schweißen.
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