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Iowa State University researcher looks to use nanoparticles for food safety
Date:4/10/2008

Ames, Iowa Byron Brehm-Stecher, assistant professor in food science and human nutrition, has some big ideas for his work with tiny particles. His latest research project will allow him to study the potential of using silver nanoparticles to improve the safety of the worlds food supply.

Although the particles cant be added directly to foods, the ultimate goal of this project is to develop food-related applications such as microbe-resistant fabrics or non-biofouling surfaces. The research, he said, could have a large impact on the safety of foods.

Through our work, we hope to gain a greater understanding of how these materials affect microbial structure or function, Brehm-Stecher said. This may lead to new approaches for killing foodborne pathogens and enhancing food safety. For example, silver nanoparticles are already being used in food packaging to soak up the plant-ripening hormone ethylene, extending the shelf life of fruits. The science is at a basic point right now, but we expect that it will translate into something more applied in the future. Im looking forward to extending this as far as the questions we have will take us.

Brehm-Stecher said they hope to learn more about how silver nanoparticles exert their antimicrobial activities by testing QSI-Nano Silver for its ability to interact with microbial cells.

QSI-Nano Silver is prepared from pure metallic silver that is vaporized in the presence of an inert gas, and then condensed under controlled conditions to form discrete particles smaller than 100 nanometers in diameter. A nanometer is a billionth of a meter. You can get an idea of the size difference between a nanometer and a meter by imagining something the size of a marble sitting next to an object the size of the Earth.

One of the things we do in my lab is to develop multi-ingredient antimicrobial mixtures. I was interested in finding antimicrobials that would be physically compatible with other com
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Contact: Byron Brehm-Stecher
byron@iastate.edu
515-294-6469
Iowa State University
Source:Eurekalert

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