News Column

Studies from Federal University Yield New Data on Nanoparticles

June 3, 2014

By a News Reporter-Staff News Editor at Life Science Weekly -- Current study results on Nanoparticles have been published. According to news reporting from Florianopolis, Brazil, by NewsRx journalists, research stated, "The biotransformation of rice husk ash (RHA) by Fusarium oxysporum to generate silica nanoparticles was carried out using two different commercial growth media: malt-glucose (MG) and malt-glucose-yeast-peptone (MGYP). Biomass production, substrate consumption, organic acids production, and solubilized silica were measured during RHA biotransformation."

The news correspondents obtained a quote from the research from Federal University, "Extracellular proteins were analyzed by SD-PAGE. Silica nanoparticles were analyzed by XRD, zeta potential, SEM, and TEM. The results showed that the production of organic acids was not directly related to the solubilization of silica. Solubilization and stabilization of silica occur mainly in the exponential growth phase of F. oxysporum, which are associated with the action of extracellular proteins with sizes 24, 55, and 70 kDa."

According to the news reporters, the research concluded: "MG medium presented the best performance for the growth of F. oxysporum and production of semicrystalline, quasi-spherical silica nanoparticles in the range of 2-8 nm."

For more information on this research see: Biogeneration of Silica Nanoparticles from Rice Husk Ash Using Fusarium oxysporum in Two Different Growth Media. Industrial & Engineering Chemistry Research, 2014;53(17):6959-6965. Industrial & Engineering Chemistry Research can be contacted at: Amer Chemical Soc, 1155 16TH St, NW, Washington, DC 20036, USA. (American Chemical Society -; Industrial & Engineering Chemistry Research -

Our news journalists report that additional information may be obtained by contacting T.G. Pineda-Vasquez, Federal University of Santa Catarina, Dept. of Biochem, BR-88040900 Florianopolis, SC, Brazil. Additional authors for this research include A.E. Casas-Botero, M.E. Ramirez-Carmona, M.M. Torres-Taborda, C.H.L. Soares and D. Hotza (see also Nanoparticles).

Keywords for this news article include: Brazil, Florianopolis, South America, Nanotechnology, Emerging Technologies

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Source: Life Science Weekly

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