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  • Polymer and Materials Science  (4)
  • Nuclear reactions  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Coulomb excitation of ^4^5Sc, ^7^5As, ^1^2^7I and ^1^3^3Cs
    Amsterdam : Elsevier
    Nuclear Physics, Section A 101 (1967), S. 654-662 
    Details
    ISSN: 0375-9474
    Keywords: Nuclear reactions
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0375-9474(67)90658-6
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Apparatus for instantaneously measuring ultraviolet, visible, or infrared dichroism from thin polymer during high-speed stretching (1971)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 9 (1971), S. 2151-2163 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: An apparatus has been constructed for following changes in the dichroism of a polymer film undergoing rapid elongation. By means of a rapidly rotating mirror with evenly spaced open sectors, a beam of radiation is passed through the sample and then alternately polarized in the horizontal and vertical direction so that the horizontal and vertical absorbances may be rapidly compared in time as compared with the time of sample elongation (a few milliseconds). The apparatus utilizes reflection optics and a grating monochromator so that measurements may be made by using ultraviolet, visible, or infrared radiation. The transmitted intensity is detected by a photomultiplier or semiconductor infrared device, the output of which is amplified and displayed on an oscilloscope. A temperature-controlled sample chamber is provided. The operation of the apparatus is illustrated by following the change in dichroism of a sample of dehydrohalogenated poly(vinyl chloride) with visible radiation during rapid extension.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1971.160091205
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  • 3
    Electronic Resource
    Electronic Resource
    Change in infrared dichroism during and following high-speed elongation of polyethylene (1972)
    New York : Wiley-Blackwell
    Journal of Polymer Science Part A-2: Polymer Physics 10 (1972), S. 1691-1698 
    Details
    ISSN: 0449-2978
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Use of a new apparatus is described which enables infrared dichroism to be followed as a function of time following the rapid stretching of a sample. The apparatus is double beam in dichroism, in that the infrared beam is alternately polarized parallel and perpendicular to the stretching direction and the transmitted intensity is observed on an oscilloscope. Results are presented for the stretching of a low-density polyethylene sample by approximately 28% in a time of approximately 0.1 sec. The infrared dichroism is observed to change in times of the order of 50 to 100 msec after stretching, confirming the observation made by other techniques that crystal orientation changes during this time.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1972.160100905
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  • 4
    Electronic Resource
    Electronic Resource
    Characteristic interaction of Ca2+ ions with elastin coacervate: Ion transport study across coacervate layers of α-elastin and elastin model polypeptide, (Val-Pro-Gly-Val-Gly)n (1996)
    New York : Wiley-Blackwell
    Biopolymers 39 (1996), S. 189-198 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Ion transport characteristics across a macrocoacervate layer membrane composed of aqueous elastin model polypeptides with a specific repeating pentapeptide sequence, H-(Val-Pro-Gly-Val-Gly)n-Val-OMe (n ≥ 40), were investigated. Transmembrane potential responses for NaCl, MgCl2, and CaCl2 concentration-cell systems were measured and examined systematically by comparing with those across a coacervate membrane composed of bovine neck ligamental α-elastin. In the case of the NaCl and MgCl2 systems, potential responses across these protein liquid membranes were different noticeably from each other depending upon the molecular structure with and without charged peptide side chains, whereas in the CaCl2 systems the transmembrane potential responses across the noncharged polypentapeptide coacervate membrane were comparable with those across the α-elastin coacervate membrane carrying both the positively and negatively charged amino acid residues as an amphoteric ion-exchange membrane. These results indicated that mechanisms of major Ca2+ ion transport are based on the specific and selective interactions with electrically neutral sites of elastin, such as the polypentapeptide backbone chain. © 1996 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    α-Elastin coacervate as a protein liquid membrane: Effect of pH on transmembrane potential responses (1992)
    New York : Wiley-Blackwell
    Biopolymers 32 (1992), S. 1173-1180 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A protein liquid membrane composed of coacervated α-elastin, a chemical fragmentation product of the biological elastic fiber protein, functioned as an amphoteric liquid ion-exchange membrane. Ionic permselectivities of the α-elastin coacervate membrane to a series of metal chlorides were investigated for the concentration-cell systems by the ordinary electrochemical measurements. Effects of pH on the transmembrane potential responses for NaCl, CaCl2, and MgCl2 systems were examined. Only in the Ca2+ -containing system did potential responses stay at constant levels against the pH changes, whereas in the other systems, increasing pH caused potential changes, indicating a improvement of cationic permselectivity across the α-elastin coacervate membrane. It was suggested that the characteristic Ca2+ transport mechanisms across the α-elastin coacervate membrane are related in some way to the polypeptide backbone interactions specific and selective to Ca2+ ions. © 1992 John Wiley & Sons, Inc.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.360320906
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