gm603's list 2019-04-05 11:00: Counting molecules, dodging blood cells: continuous, real-time molecular measurements directly in the living body (Professor Kevin Plaxco, University of California, Santa Barbara) 2021-05-20 16:00: Membrane-associated charge and the cardiac electrical field (Andrew Grace, Honorary Professor of Experimental Cardiology, Department of Biochemistry; Consultant Cardiologist, Royal Papworth Hospital)