================ D.J. Sikkema ================ - Doetze Jakob - geboren 1944 te Rotterdam - doctoraalexamen scheikunde Leiden 1966 - promotie Leiden .. september 1969 proefschrift: The effect of solvent benzene of the conformational equilibrium of vicinal dihalogenides. promotor: E. Havinga - hoogleraar Eindhoven - Ad astra. -- Intreerede Eindhoven 22 september 2000 - Carothers Medal, The Textile Institute International