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  • 1
    Electronic Resource
    Electronic Resource
    Sequence-Specific Gene Detection with a Gold Electrode Modified with DNA Probes and an Electrochemically Active Dye (1994)
    s.l. : American Chemical Society
    Analytical chemistry 66 (1994), S. 3830-3833 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac00093a045
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ultrasound sensitive enzyme-membrane (1981)
    Springer
    Applied microbiology and biotechnology 13 (1981), S. 197-201 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Glucose oxidase (GOD) was immobilized on an acetylcellulose membrane filter (pore size: 0.45 μm) with dipalmitoyl phosphatidyl-choline (DPPC). The activity of the GOD-DPPC membrane appeared during ultrasonic irradiation while the GOD activity disappeared when the irradiation was stopped. The apparent GOD activity (the value of the output current decrease of an oxygen electrode in the reaction mixture) gradually increased with increasing ultrasonic power below 3 W. On the other hand, it decreased with the increase in ultrasonic power over 4 W because dissolved oxygen in the reaction mixture in creased as ultrasonic cavitation was generated. The response of the membrane decreased with increasing ultrasonic frequency and the response of the membrane to ultrasound waves (20 KHz, 3 W) was reproducible. The membrane was stable for at least 2 months at 5°C. We conclude that the GOD-DPPC membrane can be regarded as a ultrasound sensitive membrane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00500097
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Stress sensitive glucose oxidase-nylon membrane (1981)
    Springer
    Applied microbiology and biotechnology 13 (1981), S. 19-23 
    Details
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Glucose oxidase (GOD) was immobilized on a nylon membrane. No activity of the GOD-nylon membrane was observed under normal conditions but it appeared when the membrane was mechanically stretched. A linear relationship was observed between the stress strength and the GOD activity of the membrane. The appearance of the GOD activity of the membrane with stress was reproducible and the membrane could be stored for at least 2 months. Therefore, the GOD-nylon membrane can be called a stress sensitive membrane.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00505336
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Photocontrol of affinity chromatography: Purification of asparaginase by photosensitive AHA-gel (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 20 (1978), S. 1775-1783 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: An agarose gel modified with N-(ω-aminohexytl)-L-aspartic acid (AHA) and spiropyran compound (AHA-spiropyran gel) was prepared and the photocontrolled binding and releasing of asparaginase were investigated with the AHA-spiropyran gel. Asparaginase was bound on the AHA-spiropyran gel under visible light and was released in the dark. The optimum conditions for photocontrolled binding and releasing of asparaginase were a 0.05M phosphate buffer concentration and pH 7.0. Seventy-five percent of the bound asparaginase was released from the AHA-spiropyran gel column in the dark. Ninetyfold purification of asparaginase was performed with the AHA-spiropyran gel Column.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260201107
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Mechanical control of the activity of glucose oxidase immobilized on porous polyvinylchloride membrane (1981)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 23 (1981), S. 2601-2608 
    Details
    ISSN: 0006-3592
    Keywords: Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Glucose Oxidase was immobilized on a porous polyvinylchloride (PVC) membrane. The activity of the glucose oxidase-PVC membrane decreased when the membrane was mechanically stretch. A linear relationship was observed between the stress and the relative logarithmic activity of the glucose oxidase-PVC membrane. Apparent Michaelis constant (Km′) and maximum velocity (Vm′) of the glucose oxidase-PVC membrane under stretched conditions were 1.4 and 0.71 times those without stretching, respectively. The decrease of the membrane activity with stress was reproducible. Therefore, the glucose oxidase activity of the membrane can be controlled with stress.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bit.260231116
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    Paper (German National Licenses)
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