To ensure the safety of food, a detection device, which can detect/monitor the present of bacteria in a real-time manner
and can be easily used for in-field tests, is highly desirable. Recently, magnetostrictive particles (MSPs) as a new type of
high-performance biosensor have been developed. The detection of various bacteria and spores in food with high
sensitivity has already been experimentally demonstrated. To fully use the technique for food safety, two miniaturized
interrogation systems based on frequency-domain and time-domain technique are developed to fabricate a handheld
detection device. The detection of Salmonella typhimurium (S. typhimurium) in liquid using a time-domain based
interrogation system was demonstrated.
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