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  • Articles: DFG German National Licenses  (12)
  • Polymer and Materials Science  (8)
  • Biochemistry and Biotechnology  (3)
  • 1H magnetic resonance imaging  (1)
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  • Articles: DFG German National Licenses  (12)
Material
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    31P MR spectroscopy and 1H MR imaging of the human prostate using a transrectal probe (1991)
    Springer
    Urological research 19 (1991), S. 349-352 
    Details
    ISSN: 1434-0879
    Keywords: Human prostate ; 31P magnetic resonance Spectroscopy ; 1H magnetic resonance imaging
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary 1H magnetic resonance imaging and 31P nagnetic resonance spectroscopy of the human prostate using transrectal surface coild are discussed. 1H MR images were characterized by a high sensitivity, revealing many details in the prostate. Localized 31P spectra acquired during the same investigation showed phosphorous metabolites, which may help differentiate between benign prostatic hyperplasia and prostate carcinoma. An endoscopic transmit-receive radio frequency (RF) antenna is also described which can be used with very low RF power.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00310148
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Radiolysis of polymers of chlorine methacrylates (1988)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 26 (1988), S. 2669-2681 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Polymers of α-chloroacrylate (MCA), 1-chloroethyl methacrylate (1CEMA), 2-chloroethyl methacrylate (2CEMA), 2,2,2-trichloroethyl methacrylate (trCEMA) and 1,2,2,2-tetrachloroethyl methacrylate (teCEMA) were γ-irradiated at 77 K. The primary radicals were generated by the abstraction of chlorine. They decay or change into chain end radicals upon warming up to room temperature.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1988.080261004
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Radiation induced radical reactions in poly(chloroalkyl methacrylate)s/triallylisocyanurate mixtures (1989)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part A: Polymer Chemistry 27 (1989), S. 1589-1598 
    Details
    ISSN: 0887-624X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Radical generation after γ-irradiation at 77 K and radical reactions during temperature increase are discussed for the polymers poly(2-chloroethyl methacrylate) and poly(1,2,2,2-tetrachloroethyl methacrylate), mixed with triallylisocyanurate (TAIC). After the radiation interaction radicals are generated in the ester alkyl side groups of the polymer by chlorine abstraction in both polymer/TAIC mixtures. Radical transfer to TAIC occurs during temperature increase to produce allyl radicals. Hence, the high radiation sensitivity of chlorine-containing polymers is combined with the reactivity of allyl radicals of TAIC in such polymer-TAIC mixtures.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pola.1989.080270510
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Fast and sensitive chemiluminescence determination of H2O2 concentration in stimulated human neutrophils (1995)
    New York : Wiley-Blackwell
    Journal of Bioluminescence and Chemiluminescence 10 (1995), S. 229-237 
    Details
    ISSN: 0884-3996
    Keywords: Polymorphonuclear leukocytes ; hydrogen peroxide ; hypochlorous acid ; respiratory burst ; chemiluminescence ; luminol ; catalase ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: A fast and sensitive chemiluminescence assay for the determination of H2O2 in stimulated neutrophils without the use of enzymes was developed. The method is based on the oxidation of luminol by hypochlorous acid. The chemiluminescence of this reaction is highly dependent on the concentration of hydrogen peroxide.Changes in H2O2 concentration in PMA-stimulated neutrophils were followed by injection of NaOCI to cell suspension at different times after cell stimulation. The short integration time of 2 s permits calculation of actual concentrations of H2O2 without influence of H2O2 decomposition by cellular enzymes or newly produced H2O2 due to dismutation of superoxide anion radicals. Concentrations of H2O2 were diminished by catalase and enhanced by sodium azide owing to inhibition of cellular catalase and myeloperoxidase. Changes in H2O2 concentration upon stimulation could be observed at 3000 cell/mL.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bio.1170100406
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Chemiluminescence intensities and spectra of luminol oxidation by sodium hypochlorite in the presence of hydrogen peroxide (1991)
    New York : Wiley-Blackwell
    Journal of Bioluminescence and Chemiluminescence 6 (1991), S. 189-192 
    Details
    ISSN: 0884-3996
    Keywords: Luminol ; sodium hyochlorite ; hydrogen peroxide ; chemiluminescence intensities ; chemiluminescence spectra ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Hydrogen peroxide amplifies the chemiluminescence in the oxidation of luminol by sodium hypochlorite. A linear relationship between concentration of hydrogen peroxide and light intensity was found in the concentration range 5 × 10-8-7.5 × 10-6 mol/l. At 7.5 × 10-6 mol/l H2O2 the chemiluminescence is amplified 550 - fold. The chemiluminescence spectra of these reactions have a wavelength maximum at 431 nm independent of the concentration of hydrogen peroxide. The results indicate that hydrogen peroxide is a necessary component in the chemiluminescent oxidation of the luminol by sodium hypochlorite.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bio.1170060309
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Mechanisms of inhibition of chemiluminescence in the oxidation of luminol by sodium hypochlorite (1993)
    New York : Wiley-Blackwell
    Journal of Bioluminescence and Chemiluminescence 8 (1993), S. 307-313 
    Details
    ISSN: 0884-3996
    Keywords: Luminol ; sodium hypochlorite ; hydrogen peroxide ; inhibition of chemiluminescence ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Two different mechanisms of inhibition of chemiluminescence in the oxidation of luminol by sodium hypochlorite were found. Most substances investigated in these experiments acted by scavenging NaOCI. This mechanism was independent of the concentration of hydrogen peroxide and the incubation time between luminol and inhibitors. The most potent inhibitors were substances containing SH groups. Compounds with amino groups as a target for HOCI/OCI- to yield chloramines were much less effective inhibitors. Another mechanism of inhibition was found for catalase. It depended on the presence of hydrogen peroxide in the incubation medium and the incubation time between luminol and catalase. The enzyme inhibited the luminescence by removing H2O2 at molar concentrations much smaller than those found for all other inhibitors. Our results confirm the present models of the mechanism of generation of luminescence in luminol oxidation.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bio.1170080604
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    EPR-Untersuchungen γ-bestrahlter chlorsubstituierter Poly(methacrylate) (1987)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 114-119 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: γ-radiolysis of poly(methyl methacrylate) (PMMA) and chlorosubstituted poly(methacrylates) gives radicals with comparable nine-line-EPR spectra. The transformations of the molecules were discussed in light of the quantitative differences in the accumulation processes. EPR-spectra at liquid helium temperatures confirm the hypothesis of allyl radical accumulation in PMMA.
    Notes: Die im Poly(methylmethacrylat) (PMMA) und in chlorsubstituierten Poly(methacrylaten) radiolytisch erzeugten Radikale ergeben ähnliche EPR-Neunlinienspektren. Molekülumwandlungen zur Deutung der quantitativ unterschiedlichen Akkumulationsprozesse werden diskutiert. EPR-Spektren bei Heliumtemperaturen bestätigen die Hypothese der Akkumulation von Allylradikalen im PMMA.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1987.010380204
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Morphologische Besonderheiten polymerer Mehrkomponentensysteme auf der Basis von Dithiolen und Diisocyanaten (1979)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 30 (1979), S. 496-502 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Polyurethanes obtained by reacting mercapto-terminated oligobutadienes, decanedithiol and diisocyanate were investigated by electron microscopy and x-ray scattering. The dependence of the morphological structure on the content of short-chain dithiol is discussed. Heterogeneities in micro- and macroregions were observed, which are caused by crystalline regions and phase separation in chemically different blocks.
    Notes: Polyurethane auf der Basis von mercapto-terminierten Oligobutadienen, Decandithiol und Diisocyanat werden mittels Elektronenmikroskopie und Röntgenstreuung untersucht. Ihre morphologischen Besonderheiten werden in Abhängigkeit vom Gehalt an Kurzkettendithiol diskutiert. Es treten Heterogenitäten im Mikro- und Makrobereich auf, die durch kristalline Bereiche und Phasentrennung in chemisch unterschiedliche Blöcke bedingt sind.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1979.010300807
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    Paper (German National Licenses)
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  • 9
    Electronic Resource
    Electronic Resource
    Characterization of ion beam damage effects in poly(1,2,2,2-tetrachloroethyl methacrylate) by ESCA (1987)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 38 (1987), S. 638-639 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1987.010381111
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Experimentelle prüfung der beziehungen zwischen mechanischen konstanten von gelen für dehnung bei konstantem quellungsgrade einerseits, bei konstantem partialdruck des quellungsmittels andererseitsHerrn Prof. Dr. R. SIGNER zum 60. Geburtstag gewidmet (1963)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 62 (1963), S. 40-48 
    Details
    ISSN: 0025-116X
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: The YOUNG's modulus E′ and the POISSON number μ′ of a swollen gel sample, stretched in an embedding fluid of constant activity, are different from the YOUNG's modulus E and the POISSON number μ of the same gel sample stretched at constant mass of the swelling agent in the sample. A relation between the four elastic constants derived recently was confirmed by experiment.
    Notes: Zwei verschiedene Bedingungen, unter denen eine gequollene Folie elastisch verformt werden kann, sind: 1. Dehnung bei konstanter Zusammensetzung, insbesondere bei konstantem Gehalt des Gelfadens an Quellungsmittel und 2. Streckung bei konstantem Partialdruck des Quellungsmittels. Die Elastizitätsmodule E, E′ und die POISSONschen Zahlen μ, μ′ für diese beiden Dehnungsbedingungen werden definiert und experimentell festgestellt. Eine quantitative beziehung zwischen diesen vier Größen, die in einer früheren Arbeit hergeleitet worden war, konnte experimentell bestätigt werden.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1963.020620105
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    Paper (German National Licenses)
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