id author title date pages extension mime words sentence flesch summary cache txt fx719k4437n James Russell Johnson Targeted Delivery of Molecular Cargo and Fluorescent Bioimaging Agents 2010 .txt text/plain 200 9 35 The dye described here, the squaraine rotaxane, shows significantly greater photostability and resistance to degradation in biological systems as compared to conventional fluorescent dyes. Fluorescence imaging provides a powerful and convenient method to monitor biological systems both in vitro and in vivo in real time. cache/fx719k4437n.txt txt/fx719k4437n.txt