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  • 1
    Electronic Resource
    Electronic Resource
    Metallporphyrinkomplexe. VIV. Mitt.: Pharmazie 36, 383 (1981)., Synthese von Polymethacrylsäureestern mit kovalent gebundenem Eisen(III)-protoporphyrin IX (1982)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 324 (1982), S. 117-124 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Metalloporphyrin Complexes. VI. Synthesis of Polymethacrylates with Covalently Bound Iron (III)-protoporphyrin IXConvenient synthesis of polymeric iron (III)-protoporphyrin IX (hemin) compounds is described. The covalent linkage via the carboxylic groups of hemin is possible by the reaction of the activated ester of hemin with polymethacrylates containing aliphatic amino groups. Polymethacrylates with aromatic amino groups are suitable to immobilize the hemin via its methine bridges. The hemin-containing polymers are characterized by visible spectra and e.p.r.-spectroscopy.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19823240115
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical transformations of polymers, XXI. Imidazole containing polymers from crosslinked macroporous poly(methacrylic acid esters) with reactive sulfoester groups (1981)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 97 (1981), S. 153-159 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Neue Imidazol enthaltende Polymere wurden durch nucleophile Substitutionsreaktionen von Poly(ethylen-methacrylatarylsulfonaten) mit Imidazol, Benzimidazol und einigen Derivaten hergestellt. Die Reaktionszeit und die verwendeten Lösungsmittel zeigten wechselnde Effekte auf die Geschwindigkeiten. Der Umsatz war am besten reproduzierbar bei hohen Reaktionsgeschwindigkeiten in Ethanol.
    Notes: New imidazole containing polymers were synthesized by nucleophilic substitution reactions of poly(ethylene methacrylate arylsulfonates) with imidazole, benzimidazole and some of their derivatives. The reaction time and the solvents used had varying effects on the binding rates. The conversion was best reproducible at high reaction speed in ethanol.
    Additional Material: 2 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1981.050970114
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Chemical transformation of polymers, XXII. Poly(methacrylic acid esters) with covalently linked imidazole side chains (1981)
    Weinheim : Wiley-Blackwell
    Angewandte Makromolekulare Chemie 97 (1981), S. 161-169 
    Details
    ISSN: 0003-3146
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Imidazol enthaltende Polymere wurden durch polymeranaloge Reaktion von Poly(ethylen-methacrylat-arylsulfonaten) mit substituierten Imidazolderivaten hergestellt. Die Imidazolderivate mit exocyclischen funktionellen Gruppen wurden an die Polymermatrix über Seitenketten gebunden. Durch weitere polymeranaloge Reaktionen wurden die exocyclischen funktionellen Gruppen zu Imidazol enthaltenden Polymeren mit primären Aminogruppen oder Carboxylgruppen umgesetzt.
    Notes: Imidazole containing polymers were synthesized by polymer-analogous reactions of poly(ethylene methacrylate arylsulfonates) with substituted imidazole derivatives. The imidazole derivatives with exocyclic functional groups were bound to the polymer matrix via spacers. By further polymer-analogous reactions the exocyclic functional groups were modified, so as to give rise to imidazole containing polymers with primary amino groups or carboxyl groups.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/apmc.1981.050970115
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Kinetically controlled urease electrode (1989)
    Weinheim : Wiley-Blackwell
    Electroanalysis 1 (1989), S. 535-539 
    Details
    ISSN: 1040-0397
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The parameters and the measuring principle of a urease electrode are described. The urease is physically entrapped in cellulose triacetate on the active surface of a pH glass electrode with an internal reference electrode. The Michaelis constant of immobilized urease was similar to that of soluble enzyme (KM = 2.40 mmol/L). The average apparent enzyme activity amounts to 2 IU per sensor preparation. An enzyme loading factor of 0.04 was determined. It indicates kinetically controlled reaction conditions of the sensor. A fixed-time measuring procedure provides a response time of 30 seconds and a linear response within a concentration range of 2 to 40 mmol/L urea in real biological samples (e.g., serum).
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140010610
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  • 5
    Electronic Resource
    Electronic Resource
    Adenylate cyclase in membrane fractions of RIN-A2-cells: Studies with forskolin, NaF, GppNHp and NEM (1988)
    New York, NY [u.a.] : Wiley-Blackwell
    Cell Biochemistry and Function 6 (1988), S. 131-135 
    Details
    ISSN: 0263-6484
    Keywords: Adenylate cyclase ; insulin-producing tumour cells ; N-proteins ; forskolin ; GppNHp ; thiols ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: In crude membrane fractions of rat pancreatic islets and of RIN-A2-cells, forskolin and NaF stimulated adenylate cyclase activity. Basal and stimulated enzyme activity was approximately 3 to 6 fold higher in membranes of RIN-A2-cells than in membranes of islet cells. In RIN-A2-cells GppNHp and NEM inhibited forskolin-stimulated cyclase system of RIN-A2-cells contains inhibitory and stimulatory N-proteins and that there are critical thiols related to Ni, Ns and/or the catalytic unit. Thus, membrane fractions of RIN-A2-cells may be an appropriate model for studies on the adenylate cyclase system of insulin-producing cells.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cbf.290060208
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    Paper (German National Licenses)
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