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  • 1
    Electronic Resource
    Electronic Resource
    Control of tumour-associated peroxidases in a genetic tumour system inNicotiana (1974)
    Springer
    Cellular and molecular life sciences 30 (1974), S. 1007-1008 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Isoperoxide-Muster von Nicotianaarten und ihren tumorbildenden Hybriden sind charakteristisch verschieden. Das Tumorgewebe zeigt spezifische Isoenzyme der Peroxidase, die im gesunden Gewebe derselben Pflanze nicht vorkommen.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01938975
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  • 2
    Electronic Resource
    Electronic Resource
    The elastic moduli of anisotropic polymers having a lamellar texture (1973)
    Springer
    Colloid & polymer science 251 (1973), S. 117-122 
    Details
    ISSN: 1435-1536
    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: Zusammenfassung Es wird ein Modell für ein teilkristallines Polymeres mit definierter lamellarer Textur betrachtet, bei dem die Orientierung der Lamellenebenen, wie sie sich aus Kleinwinkelröntgenstreuung ergibt, berücksichtigt wird. Die Moduln längs der kristallographischen Achsena, b, c werden auf der Basis eines interlamellaren Scherungsmechanismus für ein Polymeres von 60% Kristallinität (Niederdruckpolyäthylen) berechnet und mit den experimentellen Werten verglichen. Die Übereinstimmung scheint vernünftig.
    Notes: Summary A model for a semi-crystalline polymer having a welldefined lamellar texture is considered in which the orientation of the lamellar planes, as deduced from lowangle X-ray diffraction studies, is taken into account. The moduli along the crystallographica-,b- andc-axis are calculated on the basis of interlamellar shear mechanism for a 60% crystalline polymer (LDPE) and compared with the experimental values. The broad agreement is shown to be reasonable.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01498935
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  • 3
    Electronic Resource
    Electronic Resource
    Orientation-dependence of the Young's modulus of high-density polyethylene filaments (1974)
    Springer
    Colloid & polymer science 252 (1974), S. 288-293 
    Details
    ISSN: 1435-1536
    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: Zusammenfassung DerYoungs-Modul von HDPE-Fäden, kaltgestreckt in verschiedenem Ausmaß, wurde bestimmt. Die Orientierungsverteilung der Kristallite und der Moleküle in den amorphen Bereichen wurden quantitativ bestimmt. Unter Voraussetzung eines Einphasen-Modelles für die Berechnung derYoung-Modulen wird gezeigt, daß der Modul primär mit der mittleren Orientierung der Moleküle in den amorphen Bezirken gekoppelt ist.
    Notes: Summary TheYoungs modulus of HDPE filaments cold-drawn to different extents has been determined. The orientation distribution of the crystallites, of the total molecules and of the amorphous regions have been quantitatively determined. Using a simple one-phase model to predict theYoungs moduli, it is shown that the modulus is related primarily to the average orientation of the molecules in the amorphous regions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01551149
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  • 4
    Electronic Resource
    Electronic Resource
    IR spectroscopic study of the structure of diphenyl and the dipyridyls (1973)
    Springer
    Journal of applied spectroscopy 18 (1973), S. 247-249 
    Details
    ISSN: 1573-8647
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00604727
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  • 5
    Electronic Resource
    Electronic Resource
    Processability characteristics of chlorinated poly(vinyl chloride) (1974)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 12 (1974), S. 255-264 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chlorinated poly(vinyl chloride) (CPVC) is known to have a higher softening temperature than conventional poly(vinyl chloride) (PVC). Its processability characteristics are, however, different; it has been reported that CPVC is more difficult to process. However, only limited information on the processability characteristics is available. This paper describes some studies of the flow behavior of CPVC melts in a capillary rheometer. The true melt viscosity and activation energy were determined between 190° and 210°C for a number of samples, and they appear to be related to the cohesive energy density of the samples. It was observed that melt fracture, i.e., gross distortion of the extrudate, occurs even at low shear rates in samples having a high chlorine content. This has been attributed to the relatively high pressures that have to be used, the pronounced non-Newtonian nature of the melt, and melt elasticity. It is postulated that melt elasticity could result from crosslinking at the site of the double bond which is known to be formed by dehydrochlorination.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1974.170120201
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  • 6
    Electronic Resource
    Electronic Resource
    Thermal degradation of poly(vinyl chloride). II. Degradation mechanism based on decomposition energetics (1973)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 11 (1973), S. 1841-1850 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: On the basis of the measured activation energies for radical and HCl generation in four poly(vinyl chlorides) of controlled structures, an overall mechanism of degradation is proposed. The mechanism is a chain reaction involving a β-chloro elimination from a radical-containing polymer molecule. Molecules containing tertiary C—Cl bonds are shown to undergo a fast initiation. Those containing tertiary C—H bonds are also demonstrated to be highly unstable, but the instability is not associated with the initiation step.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1973.170110806
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  • 7
    Electronic Resource
    Electronic Resource
    Normal vibrations of α-glycylglycine (1972)
    New York : Wiley-Blackwell
    Biopolymers 11 (1972), S. 2091-2098 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A complete normal coordinate analysis, infrared absorption, and inelastic neutron scattering studies on α-glycylglycine are reported. A Urey-Bradley force field which is also valid for N-deuterated sample is obtained. Assignments in the low-frequency region are based on inelastic neutron spectrum obtained in one phonon and cubic approximation.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1972.360111009
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  • 8
    Electronic Resource
    Electronic Resource
    Vibrational spectrum of cyclic tetra-L-alanine (1972)
    New York : Wiley-Blackwell
    Biopolymers 11 (1972), S. 2099-2108 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A normal coordinate analysis for cyclic tetra-L-alanine molecule is reported. A comparison of amide modes and other low-frequency vibrations sensitive to conformational changes is made with those in poly-L-alanine. Intramolecular coupling coefficients are calculated using perturbation treatment.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1972.360111010
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  • 9
    Electronic Resource
    Electronic Resource
    Vibrational spectra and dispersion curves of poly-L-proline II chain (1973)
    New York : Wiley-Blackwell
    Biopolymers 12 (1973), S. 1377-1385 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Using Wilson's GF-matrix method as modified by Higgs for infinite helical polymers, dispersion curves and the frequency distribution function have been calculated for poly-L-proline II chain. Infrared spectrum is obtained and a Urey-Bradley force field, which provides best fit with the observed frequencies, is evaluated. The result are discussed from the viewpoint of the conformational characteristics of forms I and II.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1973.360120613
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  • 10
    Electronic Resource
    Electronic Resource
    Vibrational analysis and dispersion curves of poly-L-hydroxyproline chain (1974)
    New York : Wiley-Blackwell
    Biopolymers 13 (1974), S. 1965-1973 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dispersion curves and frequency distribution for poly-L-hydroxyproline (PLHP) chain were obtained using Wilson's GF matrix method as modified by Higgs. These are compared with those of poly-L-proline II and polyglycine II, which also have three-fold screw symmetry. Ring and skeletal modes characteristic of PLHP are identified and the assignments of observed infrared and Raman frequencies are reported. Urey-Bradley force constants were evaluated.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1974.360131004
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