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First: Titanium micromotors zip around stomach, fight bacteria

In what they are calling a world first, nanoengineers at the University of California San Diego (UCSD) have delivered tiny drug-bearing motors into the stomachs of mice where the devices moved around via bubble propulsion. The locomotion method not only allowed the mini molecular machines to navigate, but it also changed the pH of the stomach to allow the successful dispatch of bug-clobbering antibiotics.
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