Sensor sensibility: A sensor that continuously monitors levels of analytes by emitting a radiofrequency signal could be used to determine metabolite or drug levels in vivo. We describe a sensor that consists of a semipermeable membrane, magnetic nanoparticles, and a binding protein that responds to analyte with reversible changes in the size of nanoparticle/binding protein microaggregates, which changes sensor proton relaxation times (see figure).
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Sun et al. (2006) studied this question.
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