Akira Tsuda, principal research scientist at the Harvard School of Public Health watch fluorescent nanoparticles move through the respiratory system, an advance that could lead to better drugs.  Pelham Plastics developes a custom-made catheter to deliver the nanoparticles into a rat lung.  Click on the below link to read the full article.

http://www.technologyreview.com/biomedicine/26719/page1/