News Column

Study Results from St. Petersburg State University Broaden Understanding of Peroxidases

June 17, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Research findings on Enzymes and Coenzymes are discussed in a new report. According to news reporting from St. Petersburg, Russia, by NewsRx journalists, research stated, "This paper describes ultrathin gold nanowires (NWs) and nanoparticles (NPs) prepared by oleylamine (OA) synthesis and their assembly with horseradish peroxidase enzyme (HRP) for bioelectrochemical sensing of hydrogen peroxide for the first time. The immobilization of oxidoreductase enzyme HRP on the electrodes modified with OA gold nanostructures (OANSs) is discussed."

The news correspondents obtained a quote from the research from St. Petersburg State University, "The HRP-sensor characteristics, namely sensitivity, working concentration range, sensor-to-sensor and measurement-to-measurement reproducibility as well as long-term stability, are improved significantly compared to the planar thin-film sensors by using OANSs. The thin-film gold electrodes modified with OANWs and OANPs exhibit a catalytic activity towards oxidation of hydrogen peroxide with a working concentration range from 20 M to 500 M, a sensitivity of 0.031 A M(-1) cm(-2) (RSD 0.046) and 0.027 A M(-1) cm(-2) (RSD 0.045), and a detection limit of 5 M and 8 M, respectively (RSD near the detection limits was 9-12%)."

According to the news reporters, the research concluded: "Our study shows that ultrathin gold nanowires and nanoparticles prepared by oleylamine synthesis are prospective materials to assemble biomolecules into functional nanoarchitectures for enzyme-based bioelectrochemical sensors, metalloprotein bioelectronics, and energy research."

For more information on this research see: Bioelectrochemical systems with oleylamine-stabilized gold nanostructures and horseradish peroxidase for hydrogen peroxide sensor. Biosensors & Bioelectronics, 2014;57():54-8. (Elsevier -; Biosensors & Bioelectronics -

Our news journalists report that additional information may be obtained by contacting E. Koposova, Faculty of Chemistry, St Petersburg State University, Universitetskaya nab 7, 9, 199034 St Petersburg, Russia. Additional authors for this research include X. Liu, A. Kisner, Y. Ermolenko, G. Shumilova, A. Offenhausser and Y. Mourzina (see also Enzymes and Coenzymes).

Keywords for this news article include: Gases, Russia, Anions, Eurasia, Elements, Nanowire, Chemistry, Peroxidases, Electrolytes, Nanoparticle, St. Petersburg, Nanostructural, Nanostructures, Nanotechnology, Oxidoreductases, Hydrogen Peroxide, Inorganic Chemicals, Emerging Technologies, Enzymes and Coenzymes, Reactive Oxygen Species.

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC

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Source: Life Science Weekly

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