Engineers filled a glass tube bent like a tuning fork, kept vibrating by a circuit at its resonance frequency, with simulated stomach and intestine contents and passed an over-the-counter time-release drug granule through the tube. They observed a brief change in the frequency. When plotted, they could compare the peaks of resonance frequency against the time to learn the buoyant mass of the drug granule at that moment.
from Top Health News -- ScienceDaily https://ift.tt/33gHbQt
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