AMO Seminar Thurs. 4th December 15:15-16:00 Fys Aud. Title: Isomerizations of The Retinal Chromophore Speaker: Yoni Toker Departement of Physics Institute of Nano-technology and Advanced Materials Abstract: The primary step of every known form of animal vision is absorption of a photon by the retinal chrompore which causes an isomerization. In recent years a technique based on two stages of ion mobility spectroscopy (IMS-IMS) is emerging which allows one to measure isomerizations directly and determine internal energy barriers. We will present studies of thermal isomerizations of the retinal chrompore using IMS-IMS and their implications for understanding the role of Rhodopsin proteins in tuning the chromphores properties. Coffee, tea and cake will be served at 15:05