Professor Kuchel is an outstanding theoretical/physical biochemist and NMR spectroscopist. The unifying theme of his work, which is noticeably transdisciplinary, has been the measurement of the time dependence of molecular events in the red blood cell, and relating the experimental observations to molecular mechanisms of enzymes and transport proteins as they operate in situ. Throughout his work, which has continuously broken new ground, he has applied a very high level of mathematical and computational expertise, and has developed several innovative NMR-based experimental procedures for the measurement of physical parameters inside cells.