Microcylinders containing colored dye

Sealed microcylinders containing colored dye are shown inside the narrow opening of a standard-sized hypodermic needle. These nontoxic, biodegradable microparticles could be used for delivering large or continuous doses of one or more drugs at a specific location, like a cancerous ...This is an NSF Multimedia Gallery item.
Source: NSF Multimedia Gallery - Category: Science Source Type: video