News Column

New Findings on Nanoparticles Described by Investigators at Nanjing University

May 6, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- New research on Nanoparticles is the subject of a report. According to news reporting from Jiangsu, People's Republic of China, by NewsRx journalists, research stated, "Immobilization is an important method to increase enzyme stability and allow enzyme reuse. One interesting application in the field of environmental biotechnology is the immobilization of laccase to eliminate phenolic contaminants via oxidation."

The news correspondents obtained a quote from the research from Nanjing University, "Fumed silica nanoparticles have interesting potential as support material for laccase immobilization via sorption-assisted immobilization in the perspective of applications such as the elimination of micropollutants in aqueous phases. Based on these facts, the present work aimed to formulate laccase-nanoparticle conjugates with defined laccase combinations in order to obtain nanobiocatalysts, which are active over a broad range of pH values and possess a large substrate spectrum to suitably address pollution by multiple contaminants. A multi-enzymatic approach was investigated by immobilizing five different types of laccases originating from a Thielavia genus, Coriolopsis polyzona, Cerrena unicolor, Pleurotus ostreatus, and Trametes versicolor onto fumed silica nanoparticles, separately and in combinations. The laccases differed concerning their pH optima and substrate affinity. Exploiting their differences allowed the formulation of tailor-made nanobiocatalysts. In particular, the production of a nanobiocatalyst could be achieved that retained a higher percentage of its relative activity over the tested pH range (3-7) compared to the dissolved or separately immobilized enzymes. Furthermore, a nanobiocatalyst could be formulated able to oxidize a broader substrate range than the dissolved or separately immobilized enzymes."

According to the news reporters, the research concluded: "Thereby, the potential of the nanobiocatalyst for application in biochemical oxidation applications such as the elimination of multiple target pollutants in biologically treated wastewater has been illustrated."

For more information on this research see: Immobilization of defined laccase combinations for enhanced oxidation of phenolic contaminants. Applied Microbiology and Biotechnology, 2014;98(3):1397-1406. Applied Microbiology and Biotechnology can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer -; Applied Microbiology and Biotechnology -

Our news journalists report that additional information may be obtained by contacting E.M. Ammann, Nanjing University, Sch Environm, State Key Lab Pollut Control & Resource Reuse, Nanjing 210023, Jiangsu, People's Republic of China. Additional authors for this research include C.A. Gasser, G. Hommes and P.F.X. Corvini (see also Nanoparticles).

Keywords for this news article include: Asia, Jiangsu, Nanotechnology, Emerging Technologies, People's Republic of China

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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