CEP: June 2008 When I was a Girl Scout, we sang a song called "Make New Friends"that went like this: Make new friends, But keep the old, One is silver, And the other's gold. As children, we thought of friends as people, or perhaps a pet or an imaginary companion... Share Nanosensors: Evolution, Not Revolution...Yet June2008News FeatureSuzanne A. ShelleyPromising nanotechnology-enabled sensors, monitoring devices and analytical instruments continue to advance toward commercialization for diverse industrial, environmental, medical and military applications— but hurdles remain. Effects of Design on Tray Efficiency in Commercial Towers June2008Reactions and SeparationsHenry Z. KisterWhen designing a new distillation column or revamping an existing one, it is important to understand the factors that affect overall tray efficiency. Choose the Right Elastomer June2008MaterialsWilliam M. StahlMatch a material's performance to process conditions to reduce leaks, improve safety and extend the mean time between failures (MTBF). Improve Control of Liquid Level Loops June2008InstrumentationDouglas J. Cooper, Robert RiceUse this tuning recipe for the classic integrating process control challenge. Understand Discrete Nanoscale Transport June2008On The HorizonAnh-Tuan Dinh, Samir Mitragotri, Chinmay PangarkarUnlike mass, energy and momentum transfer, which are described by continuum equations, the movements and interactions of the nanoscale entitites within a cell constitute the transport phenomenon known as discrete nanoscale transport (DNT). Copyright Permissions: Would you like to reuse content from CEP Magazine? It’s easy to request permission to reuse content. Simply click here to connect instantly to licensing services, where you can choose from a list of options regarding how you would like to reuse the desired content and complete the transaction.