Previous investigations with a spectrum of tu mors demonstrated that nitrogen mustards (17) and triethylene melamine (19) had a definite in hibitory or destructive action on certain types of tumors. In view of the fact that the biological ac tivity of these compounds is believed to be due to the formation of ethylenimmonium ions in the case of the former (7) and the presence of ethylenimine gro...

We demonstrate a new technique for selectively growing gold nanoparticles on a patterned three-dimensional (3D) polymer microstructure. The technique integrates 3D direct writing of heterogeneous microstructures with nanoparticle synthesis. A digital micromirror device is employed as a dynamic mask in the digital projection photopolymerization process to build the heterogeneous microstructure l...

The delivery of genetic material into cells is a field that is expanding very rapidly. Non-viral delivery methods, especially ones that focus on the use of chemical agents complexed with genetic material, are the focus of this mini-review. More-recent uses of known transfection agents such as poly(ethylenimine), poly(L-lysine), and various liposomes are discussed, and some novel approaches (bot...