The Vi-CELL™ cell viability analyzer (Figure 1) from Beckman Coulter has been specifically designed to automate the trypan blue vital dye exclusion technique, which is otherwise performed manually.

In dilute solutions, polyion complexes often do not precipitate but become colloidal particles in the same way as hydrophobic colloids of low molar mass salts, such as AgI. 10 Colloidal polyion ...