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  • Inorganic Chemistry  (4)
  • biopolymers  (1)
  • dislocation theory of melting  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Meander model of amorphous polymers (1982)
    Springer
    Colloid & polymer science 260 (1982), S. 378-393 
    Details
    ISSN: 1435-1536
    Keywords: Amorphous polymers ; biopolymers ; fibrils ; meander model ; superstructur
    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 Assuming bundles (of shortrange ordered macromolecules, folding back and forth statistically), their equilibrium superstructure and diameter are described on the basis of cluster-entropy-hypothesis (CEH). As primary blocks in the bulk polymer and in thin films coupled meander cubes are most probable, which are linked via their cube diagonals serving as axis of statistical rotation and aggregate to coarse grains. Magnetic birefringence, SANS and elctronmicroscopy are used as further methods to determine the cube side length. Applying the same concept to myosin-, collagen-, and elastin-aggregates, these can be interpreted as equilibrium meander fibrils, additionally stabilized by specific interactions and by the length of the molecules.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01448144
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Versetzungstheorie des Schmelzens auf der Grundlage der Cluster-Entropie-Hypothese (CEH) (1982)
    Springer
    Colloid & polymer science 260 (1982), S. 248-257 
    Details
    ISSN: 1435-1536
    Keywords: phase transition ; dislocation theory of melting ; cluster-entropy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Abstract As a model for the melting of densely packed atomic crystals (as well as for the “true” melting of molecular and polymer crystals) the formation of tilt boundaries by dislocation loops inside a “melt-grain” with parallel glide planes is proposed. The dislocation arrangement is allowed to fluctuate in time and in space (from grain to grain). Taking lines of atoms (atomic dislocations) perpendicular to the tilt boundaries as statistical elements, and using the cluster-entropy-hypothesis (CEH), a cooperative treatment of the melt-transition and of the defect-contribution to the thermal properties as well as an estimate of the activation energy of the viscosity are achieved.
    Notes: Zusammenfassung Für das Schmelzen dichtgepackter Atomkristalle (und auch für die „eigentliche“ Schmelzumwandlung von Molekül- und Polymerkristallen) wird die Bildung von Wänden aus Versetzungsringen in einem „Schmelzkorn“ paralleler Gleitebenen vorgeschlagen. Diese Versetzungsstruktur kann zeitlich und räumlich (von Korn zu Korn) fluktuieren. Mit Atomreihen senkrecht zu den Versetzungswänden (Atomversetzungen) als statistischen Elementen und aufgrund der Cluster-Entropie-Hypothese (CEH) gelingt eine kooperative Behandlung der Schmelzumwandlung und des Defektanteils der thermischen Eigenschaften sowie eine Abschätzung der Aktivierungsenergie der Viskosität.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01447961
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Frage der indirekten Bestimmung des Lithiumgehaltes von [W(C6H5)2(LiC6H5)4] · 4(C2H5)2O durch Titration. Mit 4 Abbildungen (1968)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 359 (1968), S. 234-240 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The successive reactions which occur in a hydrolysed solution of diphenylo-tetra(lithiumphenyl)-tungsten(II) during titration with acids under different conditions are dealt with. The efficiency of the titrations for indirect estimation of lithium in the organometallic tungsten compound is discussed.
    Notes: Die bei der Titration einer hydrolysierten Lösung von Diphenylo-tetra(lithiumphenyl)-wolfram(II) mit Säure unter verschiedenen Bedingungen ablaufenden Nebenreaktionen werden besprochen. Die Frage, wie weit es zulässig ist, diese Titrationen für eine indirekte Lithiumbestimmung in der metallorganischen Wolframverbindung auszuwerten, wird diskutiert.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19683590503
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Wasserstoffverbindungen von Schwermetallen. VII. Eine Wasserstoffverbindung des WolframsProfessor Günther Rienäcker zum 60. Geburtstage gewidmet (1964)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 329 (1964), S. 218-224 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: W(C6H5)4(LiC6H5)2 · 3 (C2H5)2O react with H2 in absolute absence of air and moisture to form WH(LiC6H5)2. The preparation and the properties of the compound are described and a reactionshene is stated.
    Notes: Aus W(C6H5)4(LiC6H5)2 · 3 (C2H5)2O und H2 entsteht unter Luft- und Feuchtigkeitsausschluß WH(LiC6H5)2. Darstellung und Eigenschaften der Vervindung werden beschrieben und Angaben über den Reaktionsablauf gemacht.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19643290125
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Über die Multirotation des Rohrzuckers bei Gegenwart alkalischer Uranylsalzlösungen (1910)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 43 (1910), S. 676-682 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.191004301115
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der Dicyandiamidin-Verbindungen (1910)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 43 (1910), S. 674-676 
    Details
    ISSN: 0365-9496
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.191004301114
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    Paper (German National Licenses)
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