Quantification of magnetic susceptibility in several strains of Bacillus spores: Implications for separation and detection

✍ Scribed by Kristie Melnik; Jianxin Sun; Aaron Fleischman; Shuvo Roy; Maciej Zborowski; Jeffrey J. Chalmers

• Publisher: John Wiley and Sons
• Year: 2007
• Tongue: English
• Weight: 352 KB
• Volume: 98
• Category: Article
• ISSN: 0006-3592
• DOI: 10.1002/bit.21400

✦ Synopsis

Abstract

Three strains of Bacillus: Bacillus atrophaeus (formally Bacillus globigii), Bacillus thuringiensis, and Bacillus cereus were tested for their intrinsic magnetic susceptibility. All three strains when sporulated demonstrated significant magnetic susceptibility using an instrument referred to as Cell Tracking Velocimetry. Energy dispersive spectroscopy also confirmed the presence of paramagnetic elements, Fe and Mn, in the spore form of the bacteria. It was demonstrated that this magnetic susceptibility is sufficient to separate and deposit these spores on glass slides in a magnetic deposition system. These results indicate the potential to separate spores with intrinsic magnetic susceptibility directly out of water or air samples. Biotechnol. Bioeng. 2007; 98: 186–192. © 2007 Wiley Periodicals, Inc.