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  • 1
    Electronic Resource
    Electronic Resource
    Effects of aging and dietary restriction on DNA polymerases: gene expression, enzyme fidelity, and DNA excision repair
    Amsterdam : Elsevier
    Experimental Gerontology 27 (1992), S. 593-613 
    Details
    ISSN: 0531-5565
    Keywords: DNA polymerase, gene expression, enzymes, DNA repair ; aging ; dietary restriction
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0531-5565(92)90014-Q
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  • 2
    Electronic Resource
    Electronic Resource
    Effects of aging anf dietary restriction of DNA polymerase expression in mice
    Amsterdam : Elsevier
    Experimental Gerontology 26 (1991), S. 97-112 
    Details
    ISSN: 0531-5565
    Keywords: DNA polymerase ; aging ; calorie ; dietary restriction
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0531-5565(91)90066-U
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  • 3
    Electronic Resource
    Electronic Resource
    Absorption and circular dichroism spectra of methylene blue bound to alginate (1979)
    New York : Wiley-Blackwell
    Biopolymers 18 (1979), S. 2745-2768 
    Details
    ISSN: 0006-3525
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The addition of methylene blue to certain samples of Na alginate produces a complex succession of spectrally distinguishable aggregated (metachromatic) dye species. Three of these species are active in CD; they are interpreted as aggregates of dye, but probably dimers, bound in orientations characteristic of the constituent copolymer blocks of alginate to which they are tentatively assigned. The aggregates compete with divalent metal ions and hydrogen ion for the binding sites of the polymer. Other samples of alginate give a modified succession of aggregated spectral species, which are almost devoid of CD activity. Mild treatment with acid, insufficient for hydrolysis, converts forms of alginate with CD activity into modified forms without it, the absorption spectra of which resemble those of samples originally devoid of activity. It is implied, subject to confirmation, that the chiral properties of the binding sites of the native polysaccharide are diminished or lost by acid treatment during commercial preparation.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bip.1979.360181108
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of structural variations on the thermo-oxidative stability of aromatic polyimides (1972)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 153 (1972), S. 237-254 
    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: Polyimide wurden aus einer Vielfalt von Diaminen und Dianhydriden hergestellt. Ihre Stabilität bei 400°C in Luft wurde durch thermogravimetrische Analyse bestimmt. Wenn möglich, wurden hochmolekulare Filme verwendet, die durch thermische Kondensation der Poly-Amidsäure-Zwischenprodukte erhalten wurden. Wenn dies nicht möglich war, wurden Filme aus Polymeren, die mit Acetanhydrid cyclisiert waren, oder wärmebehandelte Pulver untersucht.Für die aus Pyromellithsäure-dianhydrid und einer Vielfalt von Diaminen hergestellten Polyimide wurde eine gut definierte Abstufung der Stabilität beobachtet. Die einfachsten und symmetrischsten Strukturen besaßen die höchste Wärmestabilität; die schlechtesten Resultate wurden mit elektronegativen Kopplungsgruppen erzielt.
    Notes: Polyimides were synthesised from a number of diamines and dianhydrides and their stability determined by thermogravimetric analysis at 400°C in air. Wherever possible high molecular weight films obtained by thermal condensation of the polyamic acid intermediates were studied. If this was not possible, films obtained from acetic acid anhydride ciclised polymers or thermally cured powders were used.A well defiend order of stability was observed for the polyimides prepared from pyromellitic dianhydride and a variety of diamines. The simplest and most symmetrical structures had the greatest thermal stability. Lowest stabilities were observed when linking groups were electronegative in nature.
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1972.021530121
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation and fabrication of aromatic polyimides (1967)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 11 (1967), S. 609-627 
    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: Aromatic polyimides were prepared from pyromellitic dianhydride and a number of aromatic diamines. The effect of certain variables on the polymerization to, and the degradation of, the intermediate polypyromellitamic acids was studied, and a previously unrecorded reaction intermediate was isolated and identified. From these studies the conditions necessary to obtain high molecular weights were defined. Techniques were developed for the fabrication of satisfactory films and moldings.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1967.070110501
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  • 6
    Electronic Resource
    Electronic Resource
    Ionization and dissociation of some pyromellitimides under electron-impact (1970)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 4 (1970), S. 315-323 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The mass spectra of twenty three pyromellitimides are reported and discussed. Proposed ion structures are, in most cases, substantiated by precise mass measurement. All compounds examined exhibit molecular-ions. Ions formed by the loss of carbon dioxide from the molecular-ions, although intense in some cases, are not common to all the spectra.
    Additional Material: 12 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210040134
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  • 7
    Electronic Resource
    Electronic Resource
    Pyrolysis and mass spectra of some aromatic-imides (1968)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 1 (1968), S. 915-917 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electron-impact induced loss of CO2 from phthalanil and 4-phthalimidobiphenyl is paralleled by the formation of large amounts of CO2 on pyrolysis. CO is also a major pyrolysis product, but the loss of CO from these compounds under electron-impact is not an important fragmentation process.The mass spectra of meta and para-chlorophthalanils show prominent [M — CO2] peaks but the corresponding peak for the ortho isomer is of relatively low intensity. CO and CO2 are the principal gaseous products of the thermal decomposition of o-chlorophthalanil.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210010617
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  • 8
    Electronic Resource
    Electronic Resource
    Arylsulfonic polymers. II. Synthesis and polymerization of fluorosulfonylaryl monomers (1960)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 48 (1960), S. 151-157 
    Details
    ISSN: 0022-3832
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Owing to the stability of the sulfonyl fluoride group and the reactivity of the amino group, aminobenzenesulfonyl fluorides enable the synthesis of a large number of polymers and copolymers bearing sulfonic acid groups. It is indeed possible to react aminobenzenesulfonyl fluorides with acrylic or methacrylic acid chloride or with vinyl isocyanate to obtain substituted acrylamides or vinylureas which can be polymerized or copolymerized with other vinyl monomers. Another method of preparing arylsulfonic polymers with the use of aminobenzenesulfonyl fluorides is the reaction of the latter with polymers containing reactive groups, such as polyacrylic anhydride and copolymers of maleic anhydride. The fluorosulfonyl-substituted polymers and copolymers can easily be hydrolyzed in slightly alkaline medium.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1960.1204815016
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  • 9
    Electronic Resource
    Electronic Resource
    Cyclopolymerization of vinyl trans-cinnamateCommunication presented at the IUPAC-Symposium on Macromolecules, Wiesbaden, October 1959. (1960)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 37 (1960), S. 46-52 
    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: Vinyl-trans-cinnamat, ein asymmetrisches Divinylmonomeres, wurde synthetisiert und aus ihm ein lineares lösliches Polymeres hergestellt.Mit Hilfe von Infrarotspektren sowie auf chemischem Wege konnte gezeigt werden, daß diese Polymeren sich von einem Polyvinylcinnamat, das durch Veresterung von Polyvinylalkohol mit Zimtsäurechlorid erhalten wurde, wesentlich unterscheiden.Die Polymeren, die durch Polymerisation des Monomern erhalten wurden, sind durch die Anwesenheit von γ-Lacton-Ringen, die infolge eines Cyclopolymerisationsmechanismus entstanden, gekennzeichnet.
    Notes: Vinyl trans-cinnamate, an unsymmetrical divinyl monomer, has been synthesized, and polymerized to linear, soluble polymers.It was found by infrared and chemical analysis that these polymers are quite different from polyvinyl cinnamates synthesized through esterification of polyvinyl alcohol by cinnamoyl chloride.The polymers prepared by polymerization of the monomer are characterized by the presence of γ-lactone rings resulting from a cyclopolymerization mechanism.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1960.020370105
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  • 10
    Electronic Resource
    Electronic Resource
    Copolymerization behavior of m- and p-styrenesulfonyl fluorides (1961)
    New York : Wiley-Blackwell
    Die Makromolekulare Chemie 49 (1961), S. 33-40 
    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: Styrolsulfonsäurefluoride sind wertvolle Ausgangsprodukte für die Synthese zahlreicher Polymere und Copolymere von Styrolsulfonsäure.Die Parameter r1 und r2 wurden für die Copolymerisation von m- und p-Styrolsulfonsäurefluorid mit Styrol und mit Methylacrylat bestimmt: -Textr1r2Styrol/m-Styrol-SO2F .....0.801.25Styrol/p-Styrol-SO2F .....0.251.30Methylacrylat/m-Styrol-SO2F .....0.141.50Methylacrylat/p-Styrol-SO2F .....0.204.0Aus diesen experimentellen Resultaten wurden die Resonanz- und elektrischen Faktoren berechnet: -TextQem-Styrol-SO2F .....1.3-0.2p-Styrol-SO2F .....1.6+0.2
    Notes: Styrenesulfonyl fluorides are useful starting materials for the synthesis of a broad range of polymers and copolymers of styrenesulfonic acid.The reactivity ratios were determined for the copolymerization of m- and p-styrenesulfonyl fluoride with styrene and with methyl acrylate: -Textr1r2styrene/m-styrene-SO2F .....0.801.25styrene/p-styrene-SO2F .....0.251.30methyl acrylate/m-styrene-SO2F .....0.141.50methyl acrylate/p-styrene-SO2F .....0.204.0From these experimental results, the resonance and electrical factors were calculated -TextQem-styrene-SO2F .....1.3-0.7p-styrene-SO2F .....1.6+0.2
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/macp.1961.020490103
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