NanoMask: Time Kill Study

Nelson Laboratories, Salt Lake City, UT – June 2005

Introduction

The testing of various nanoparticles was conducted at Nelson Laboratories, Salt Lake City, Utah, in conjunction with EFP's work to develop enhanced filter media for the United States Military. This testing was funded by a Prototype Development / Testing / Evaluation Grant by the Center for Commercialization of Advanced Technology awarded in September 2004. Various nanoparticle solutions were tested against 5 pathogens or contaminants: 1) Staphylococcus aureous, a bacteria recognized as the most common cause of hospital infections; 2) K. pneumonia, a bacteria most commonly recognized as an infection in the lungs; 3) Bacillus subtilis, a bacteria found in soil that contains similar characteristics to Anthrax; 4) Asperfillus niger, a fungus causing black mold spores and a common food contaminate; and 5) Trichophyton mentagrophyte, a fungi acting like a parasite.

Those pathogens were subjected to 6 different nanoparticles in a test known as a "Kill Time Study", measuring the percentage reduction in pathogens at various time intervals. During the tests, the nanoparticles were mixed into a solution and introduced into a controlled environment where the pathogens had been cultured. Although all of the nanoparticles showed significant effectiveness against one or more pathogens, one nanoparticle (NPS-1) in particular demonstrated exceptional percentage reduction (Kill Rates) against all 5 pathogens. The test result for NPS-1 are below:

 

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