publication venue for Effect of Operating Conditions on Gas Holdup in Slurry Bubble Columns with a Foaming Liquid. 117:367-382. 1992 Effect of Surfactant Concentration on Gas Holdup in a Bubble Column with an Organic Liquid. 105:231-239. 1991 Improving Flow Patterns in a Distillation Tray by Modifying Downcomer Apron Shape. 74:195-208. 1988