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  • 1
    Electronic Resource
    Electronic Resource
    Characterization of the stereostructure of three poly(1-butenes): discrimination between intramolecular and intermolecular distributions of defects in stereoregularity (1987)
    s.l. : American Chemical Society
    Macromolecules 20 (1987), S. 2788-2797 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00177a026
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Fluorescence correlation spectroscopy and photobleaching recovery of multiple binding reactions. II. FPR and FCS measurements at low and high DNA concentrations (1983)
    New York : Wiley-Blackwell
    Biopolymers 22 (1983), S. 1949-1966 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preceding paper develops the theory for the interpretation of fluorescence photobleaching recovery (FPR) measurements of multiple binding of a ligand to a multivalent substrate molecule. Based on a reasonable assumption about the mechanism of the photobleaching process, this analysis shows that the observed behavior of a multivalent system should be practically identical to that of a univalent binding system. This is in contrast to the expected and observed behavior of fluorescence correlation spectroscopy (FCS) measurments. Experimental FPR measurements of multivalent binding of ethidium bromide to DNA confirm these conclusions. The FCS and FPR measurements also reveal an apparently enhanced diffusion of ethidium at high DNA concentration. This enhancement might result from direct transfer of ethidium among DNA molecules.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360220809
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of nucleating agents on the temperature-dependent melt crystallization kinetics of poly(1-butene)Presented in part at the March 1983 meeting of the American Physical Society, Division of High Polymer Physics, Los Angeles, California, March 21, 1983. (1986)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 31 (1986), S. 1859-1868 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The effect of additives (mostly nucleating agents) on the crystallization rate of isotactic poly(1-butene) has been investigated by differential scanning calorimetry. Isothermal crystallization half-times and crystallization temperatures have been measured for polymer-additive blends. The crystallization temperature and the cooling rate at which the ultimate fraction transformed becomes less than 1 is calculated as a function of nucleation density, and this is used to characterize the effect of the additives on crystallization rate. The relationship between the isothermal crystallization half-time and the crystallization temperature is also calculated theoretically and is compared with experimental results.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1986.070310628
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Fluorescence correlation spectroscopy and photobleaching recovery of multiple binding reactions. I. Theory and FCS measurements (1983)
    New York : Wiley-Blackwell
    Biopolymers 22 (1983), S. 1919-1948 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Fluorescence correlation spectroscopy (FCS) and fluorescence photobleaching recovery (FPR) are two methods that may be used to measure diffusion and chemical reaction kinetics in small, labile systems such as biological cells. These methods are here applied to systems in which a fluorescent ligand can bind to a polyvalent substrate molecule in a multistep reaction sequence. The analytical theory for both FCS and FPR is extended to allow analysis of these kinds of systems. Experimental measurements of the binding of ethidium bromide to DNA by FCS confirm the theoretical analysis. (FPR measurements on the same system are reported in the accompanying paper.) The analysis shows that FCS and FPR perceive multivalent binding reactions differently. This difference results from the selective effect of the photobleaching process in the chemical reaction system. The development and results we report could have useful applications to a wide range of biopolymeric binding and assembly process.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360220808
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  • 5
    Electronic Resource
    Electronic Resource
    Temperature-dependent melt crystallization kinetics of poly(butene-1): A new approach to the characterization of the crystallization kinetics of semicrystalline polymers (1985)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Physics Edition 23 (1985), S. 1369-1391 
    Details
    ISSN: 0098-1273
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The experimental measurements necessary to characterize the crystallization kinetics of a semicrystalline polymer are established by adopting a model for the crystallization of the polymer and specifying the range in which thermodynamic variables and other field interactions with the polymer will be varied during processes of interest. The theory for a model of instantaneous heterogeneous nucleation followed by spherulitic growth is developed. To the extent to which this model accurately describes the crystallization, determination of the spherulitic growth rate and nucleation density as a function of temperature then characterizes the temperature-dependent crystallization kinetics of a polymer. These have been measured for poly(butene-1), and, with the adoption of a cooling of the polymer at a constant rate as a processing model, a useful description of the melt crystallization kinetics of poly(butene-1) is given. Literature data for the crystallization rates of linear polyethylene and isotactic polypropylene, poly(butene-1), and polystyrene and compared.
    Additional Material: 14 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1985.180230706
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    Paper (German National Licenses)
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