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June 10th, 2005
Nanoscale packages from which drug molecules can be released in controlled pulses have been developed by a team of Chinese chemists1.
This drug-delivery system is controlled by light. A flash of ultraviolet light changes the shape of molecules in the walls of the nanocompartments where the drug is held, apparently opening up pores that let the drug leak out. A flash of visible light converts the molecules back again, sealing the openings.
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