▁Institute ▁of ▁Phys ical ▁Chem istry ▁at ▁the ▁University ▁of ▁Bas el ▁where ▁he ▁became ▁a ▁group ▁leader ▁and ▁assistant ▁professor ▁in ▁ 1 9 7 2 . ▁He ▁became ▁full ▁professor ▁in ▁ 1 9 7 4 ▁and ▁in ▁ 1 9 8 2 ▁Professor ▁of ▁Struct ural ▁Bi ology ▁at ▁the ▁Bio zent rum ▁of ▁the ▁University ▁of ▁Bas el . ▁ ▁Work ▁▁ ▁Jo achim ▁Se el ig ▁developed ▁bi oph ys ical ▁methods ▁for ▁studying ▁the ▁structure ▁and ▁therm od ynamic ▁properties ▁of ▁bi ological ▁cell ▁memb ran es . ▁ ▁He ▁investig ated ▁the ▁interactions ▁of ▁prote ins ▁and ▁lip ids ▁by ▁E PR - spect ro sc opy , ▁de uter ium ▁ ▁and ▁ph osph orus ▁nuclear ▁magnetic ▁reson ance , ▁neut ron ▁diff raction ▁and ▁cal or imet ric ▁methods . ▁The ▁quant itative ▁character ization ▁of ▁the ▁bi ological ▁memb rane ▁became ▁the ▁international ▁standard ▁for ▁further ▁theoretical ▁studies . ▁His ▁second ▁field ▁of ▁research ▁was ▁magnetic ▁reson ance ▁imag ing ▁( M RI ) ▁and ▁magnetic ▁reson ance ▁spect ro sc opy ▁( M RS ) ▁in ▁the ▁human ▁and ▁animals . ▁With ▁C - 1 3 ▁N MR ▁the ▁met abol ism ▁in ▁the ▁human ▁and ▁animal ▁brain ▁could ▁be ▁trac ed ▁in ▁a ▁non - in vas ive ▁manner . ▁With ▁faster ▁M RI ▁imag ing ▁techniques ▁the ▁ton ot opy ▁of ▁the ▁human ▁brain ▁has ▁been ▁described . ▁ ▁Awards ▁and ▁hon ors ▁▁ 1 9 8 7 ▁Clo ë