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  • 1
    Electronic Resource
    Electronic Resource
    Anreicherung der leichten Argonisotope durch Diffusion (1937)
    Springer
    The European physical journal 105 (1937), S. 395-398 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Mit der Isotopentrennungsapparatur von Hertz konnten die Argonisotope36Ar und38Ar nach 60 stündiger Versuchsdauer auf 9% bzw. 0,5% der Konzentration des40Ar angereichert werden, was durch massenspektroskopische Untersuchung festgestellt wurde.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01333373
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  • 2
    Electronic Resource
    Electronic Resource
    Anreicherung der leichten Argonisotope durch Diffusion (1936)
    Springer
    Naturwissenschaften 24 (1936), S. 667-667 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01474874
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  • 3
    Electronic Resource
    Electronic Resource
    Bestimmung der Phosphorsäure in Bodenarten (1870)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 9 (1870), S. 413-416 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01363003
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  • 4
    Electronic Resource
    Electronic Resource
    Interactions between nonionic surfactant aggregates and gelatin-rheological measurements (1993)
    Springer
    Colloid & polymer science 271 (1993), S. 992-996 
    Details
    ISSN: 1435-1536
    Keywords: Nonionic surfactants ; gelatin ; interactions ; vibration rheometry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The interactions between nonionic surfactants such as polyoxyethylene cetyl ethers (C16EO20) and the polymer gelatin were investigated by rheological methods. Capillary viscosity measurements of diluted aqueous solutions confirmed the results of previous investigations [1]. C16EO20 caused an accelerated renaturation of the polypeptide gelatin. A strong variation of viscoelastic data was measured by vibration rheometry when gelatin was added to the lyotropic cubic liquid crystalline phases formed by the surfactant used. Loss module (E″) and loss factor (tan ϕ) increased with increasing content of the polymer indicating an obstruction of the coupling between the globular surfactant associates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00654859
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  • 5
    Electronic Resource
    Electronic Resource
    Mutual interactions between nonionic surfactants and gelatin — investigations in cubic liquid crystalline systems and micellar systems (1992)
    Springer
    Colloid & polymer science 270 (1992), S. 85-90 
    Details
    ISSN: 1435-1536
    Keywords: Nonionic surfactants ; lyotropic liquid crystals ; gelatin ; interactions ; transmission electron microscopy (TEM)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The mutual interactions between nonionic surfactants such as polyoxyethylene cetyl ethers (C16EO n ,n=15, 20) especially their cubic lyotropic liquid crystalline phases of typeI 1 and polymer gelatin were investigated. The colloidal microstructure of such anI 1-phase consisting of close-packed globular surfactant aggregates was shown by transmission electron microscopy (TEM). The diameter of the globules found by TEM correlated well with the periodic distance of about 7.5 nm obtained by small angle x-ray diffraction (SAXD). In ternary systems consisting of surfactant, gelatin, and water cubic liquid crystalline structures were also proved by polarized light microscopy, TEM, and SAXD. The polymer did not participate in the cubic structure but formed, at least in part, anisotropic spherulites. In diluted surfactant systems however, interactions between polymer and surfactants were clearly found by polarimetry. The nonionic surfactants caused an accelerated coil-helix transition of the polypeptid gelatin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00656934
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  • 6
    Electronic Resource
    Electronic Resource
    Eine neue Methode zur Messung extrem kleiner Ionenströme im Hochvakuum (1956)
    Springer
    The European physical journal 145 (1956), S. 44-47 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01338306
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  • 7
    Electronic Resource
    Electronic Resource
    Ein Massenspektrograph nach der Parabelmethode mit großer Linienschärfe (1933)
    Springer
    The European physical journal 82 (1933), S. 610-619 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Es wird eine Neukonstruktion eines Thomsonschen Massenspektrographen angegeben, bei welchem ein Metallentladungsrohr zur Erzeugung der Kanalstrahlen und ein Kanal und eine ebene Blende zur Ausblendung des Strahles verwendet werden. Das Auflösungsvermögen wird zu 1/600 bestimmt. — Bei den Edelgasen He, Ne und Ar wird ein komplexes Ion gefunden, das ein Hydrid des betreffenden Edelgases zu sein scheint. — Es wird eine Methode zum massenspektroskopischen Nachweis des Wasserstoffisotops H2 angegeben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01338333
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  • 8
    Electronic Resource
    Electronic Resource
    Weitere Versuche zur Isotopentrennung (1934)
    Springer
    The European physical journal 90 (1934), S. 703-711 
    Details
    ISSN: 1434-601X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Zusammenfassung Die Leistungsfähigkeit der früher beschriebenen Apparatur zur Trennung von gasförmigen Isotopengemischen ist durch Verdoppelung der Zahl der Trennungsglieder sowie durch Benutzung größerer Pumpen bei einem Teil der Trennungsglieder so weit erhöht worden, daß bereits durch einmalige Anwendung des Verfahrens aus normalem Neon das Isotop 22 praktisch rein hergestellt werden kann. Auch das schwere Wasserstoffisotop läßt sich mit Hilfe der Apparatur in großer Reinheit darstellen. Ausgehend von einem Wasserstoff, welcher etwa 1 ‰ des schweren Isotops enthält, ergibt sich in 8 Stunden 1 cm3 spektralreiner schwerer Wasserstoff von Atmosphärendruck.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01340730
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  • 9
    Electronic Resource
    Electronic Resource
    Distribution of publications as an indicator for the evaluation of scientific programs (1991)
    Springer
    Scientometrics 21 (1991), S. 459-464 
    Details
    ISSN: 1588-2861
    Source: Springer Online Journal Archives 1860-2000
    Topics: Information Science and Librarianship , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Abstract This article describes investigations into the publication behaviour of scientific authors from the GDR. The obtained data revealed that — analogous to the Lotka-distribution — not only a fifth of all authors produce half of the publications of a certain institute, but that these authors also have a quicker reaction time and receptivity to new international research problems. These findings may make it possible to substantiate proposals by guiding scientists in the direction of themes, respectively to help the science policy in the process of the elaboration of new research programs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02093981
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  • 10
    Electronic Resource
    Electronic Resource
    Erfahrungen mit mobilen Härteprüfgeräten (1987)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 18 (1987), S. 130-136 
    Details
    ISSN: 0933-5137
    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: Experiences with mobile hardness testersDuring recent years the use of mobile electronically operating hardness testers has become more and more significant for in-process inspections and shop and site inspections.The field and limits of application for this equipment are determined chiefly by the material to be tested, the geometry of the component as well as the information required of the test.The purpose of our work was to establish, with the help of two mobile hardness testers involving the dynamic and static testing procedure on more than 50 metallic materials, the way in which an alteration to various test parameters (surface condition of the components, tester calibration) would affect the hardness values indicated.Furthermore the scatter of readings for the mobile hardness tester was examined.
    Notes: Im Lauf der letzten Jahre erlangte der Einsatz mobiler Härteprüfgeräte zunehmende Bedeutung bei Fertigungsprüfungen sowie in der Bau- und Montageüberwachung, wobei Einsatzbereich und Anwendungsgrenzen in erster Linie vom zu prüfenden Werkstoff, von der Bauteilgeometrie sowie von der geforderten Prüfaussage bestimmt werden.Anhand von je zwei mobilen Härteprüfgeräten dynamischer und statischer Prüfverfahren wurde beim RW TÜV (Essen) an über 50 metallischen Werkstoffen der Einfluß verschiedener Prüfparameter, wie Beschaffenheit der Bauteiloberfläche und Gerätejustierung, auf den Härtewert untersucht und neben den Meßwertstreuungen der Prüfgeräte dargestellt. Ferner wurden die verwendeten Härteprüfgeräte miteinander verglichen und deren geräte- bzw. verfahrensabhängige Eigenschaften herausgestellt.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19870180408
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