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All Library Books, journals and Electronic Records Telegrafenberg

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  • 1
    Electronic Resource
    Electronic Resource
    Analysis of relationships between veterinary recorded production diseases and milk production in dairy cows
    Amsterdam : Elsevier
    Livestock Production Science 23 (1989), S. 67-78 
    Details
    ISSN: 0301-6226
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0301-6226(89)90006-7
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  • 2
    facet.materialart.
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    Abel, O. Die Tiere der Vorwelt (Book Review) (1915)
    Wiesbaden : Periodicals Archive Online (PAO)
    Geographische Zeitschrift. 21:1 (1915:Jan. 29) 56 
    Details
    ISSN: 0016-7479
    Topics: Geography
    Notes: Bücherbesprechungen
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:h092-1915-021-01-000016
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  • 3
    Electronic Resource
    Electronic Resource
    Reversible melting probed by temperature modulated dynamic mechanical and calorimetric measurements (1998)
    Springer
    Colloid & polymer science 276 (1998), S. 289-296 
    Details
    ISSN: 1435-1536
    Keywords: Key words Semicrystalline polymer ; PEEK ; TMDSC ; DMA ; melting ; crystallization
    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  Temperature-modulated DSC (TMDSC) and dynamic-mechanical analysis (DMA) allows the study of degree of crystallinity changes of polymers. From the comparison of the two methods using the same temperature–time program, one expects additional information about the processes occurring in the melting region. A first description of temperature-modulated DMA is given. The effect of reversible melting during every period of temperature modulation has been observed in the melting region of PEEK. The number of molecules which undergo reversible melting for a given quasi-isotherm decreases with time. At 600 K the fraction of the material involved in this process during one modulation cycle is between 0.35% and 0.25%, but has a non-zero value at infinity. The kinetics of this decrease indicates that the process of the structural changes is most likely related to the melt. It can be explained considering an entanglement of the disentangled melt surrounding the just molten crystals. The results are in agreement with the four-state scheme for polymer crystallization and melting proposed by Strobl.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003960050242
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  • 4
    Electronic Resource
    Electronic Resource
    Geologie der zentralen Balkanhalbinsel (1924)
    Springer
    Naturwissenschaften 12 (1924), S. 366-369 
    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/BF01505925
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  • 5
    Electronic Resource
    Electronic Resource
    Crystallization of Polymers Studied by Temperature Modulated Calorimetric Measurements at Different Frequencies (2000)
    Springer
    Journal of thermal analysis and calorimetry 59 (2000), S. 279-288 
    Details
    ISSN: 1572-8943
    Keywords: AC calorimetry ; crystallization ; PCL ; polymer ; temperature modulation ; TMDSC
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Quasi-isothermal temperature modulated DSC (TMDSC) were performed during crystallization to determine heat capacity as function of time and frequency. Non-reversible and reversible phenomena in the crystallization region of polymers were distinguished. TMDSC yields new information about the dynamics of local processes at the surface of polymer crystals, like reversible melting. The fraction of material involved in reversible melting, which is established during main crystallization, keeps constant during secondary crystallization for polycaprolactone (PCL). This shows that also after long crystallization times the surfaces of the individual crystallites are in equilibrium with the surrounding melt. Simply speaking, polymer crystals are ‘living crystals’. A strong frequency dependence of complex heat capacity can be observed during and after crystallization of polymers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010108617592
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  • 6
    Electronic Resource
    Electronic Resource
    Separation of components of different molecular mobility by calorimetry, dynamic mechanical and dielectric spectroscopy (1997)
    Springer
    Journal of thermal analysis and calorimetry 49 (1997), S. 499-511 
    Details
    ISSN: 1572-8943
    Keywords: dielectric spectroscopy (DETA) ; DSC ; dynamic mechanical (DMA) spectroscopy ; glass transition ; PET ; polymers ; relaxation ; rigid amorphous ; temperature modulated DSC
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The relaxation strength at the glass transition for semi-crystalline polymers observed by different experimental methods shows significant deviations from a simple two-phase model. Introduction of a rigid amorphous fraction, which is non-crystalline but does not participate in the glass transition, allows a description of the relaxation behavior of such systems. The question arises when does this amorphous material vitrify. Our measurements on PET identify no separate glass transition and no devitrification over a broad temperature range. Measurements on a low molecular weight compound which partly crystallizes supports the idea that vitrification of the rigid amorphous material occurs during formation of crystallites. The reason for vitrification is the immobilization of co-operative motions due to the fixation of parts of the molecules in the crystallites. Local movements (Β-relaxation) are only slightly influenced by the crystallites and occur in the whole non-crystalline fraction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01987477
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  • 7
    Electronic Resource
    Electronic Resource
    Reversible Melting During Crystallization of Polymers Studied by Temperature Modulated Techniques (TMDSC, TMDMA) (2000)
    Springer
    Journal of thermal analysis and calorimetry 60 (2000), S. 807-820 
    Details
    ISSN: 1572-8943
    Keywords: calorimetry ; crystallization ; PCL ; PEEK ; PEN ; PET ; polymer ; temperature modulation ; TMDMA ; TMDSC
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Quasi-isothermal temperature modulated DSC and DMA measurements (TMDSC and TMDMA, respectively) were performed to determine heat capacity and shear modulus as a function of time during crystallization. Non-reversible and reversible phenomena in the crystallization region of polymers can be observed. The combination of TMDSC and TMDMA yields new information about local processes at the surface of polymer crystals, like reversible melting. Reversible melting can be observed in complex heat capacity and in the amplitude of shear modulus in response to temperature perturbation. The fraction of material involved in reversible melting, which is established during main crystallization, keeps constant during secondary crystallization for PCL PET and PEEK. This shows that also after long crystallization times the surfaces of the individual polymer crystallites are in equilibrium with the surrounding melt. Simply speaking, polymer crystals are ‘living crystals’.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010195321797
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  • 8
    Electronic Resource
    Electronic Resource
    Isothermal Crystallisation of PCL Studied by Temperature Modulated Dynamic Mechanical and TMDSC Analysis (1999)
    Springer
    Journal of thermal analysis and calorimetry 56 (1999), S. 1155-1161 
    Details
    ISSN: 1572-8943
    Keywords: crystallisation ; DMA ; DSC ; PCL ; polymer ; temperature modulation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Temperature modulated dynamic mechanical analysis (TMDMA) was performed in the same way as temperature modulated DSC (TMDSC) measurements. As in TMDSC TMDMA allows the investigation of reversible and non-reversible phenomena during crystallisation of polymers. The advantage of TMDMA compared to TMDSC is the high sensitivity for small and slow changes in crystallinity, e.g. during re-crystallisation. The combination of TMDMA and TMDSC yields new information about local processes at the surface of polymer crystallites. It is shown that during and after isothermal crystallisation the surface of the individual crystallites is in equilibrium with the surrounding melt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010161113295
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  • 9
    Electronic Resource
    Electronic Resource
    Zur geophysikalischen Durchforschung Bayerns (1931)
    Springer
    International journal of earth sciences 22 (1931), S. 273-281 
    Details
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01810504
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  • 10
    Electronic Resource
    Electronic Resource
    Über den Bauplan des variskischen Gebirges am Westrand der Böhmischen Masse (1926)
    Springer
    International journal of earth sciences 17 (1926), S. 241-257 
    Details
    ISSN: 1437-3262
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01801780
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