Ab Initio Calculations of Conformational Effects on 13C NMR Spectra of Amorphous Polymers Breitscheidstr. 10 Models and the corresponding algorithms Pathologisches Institut der Universität Models and the corresponding algorithms are considered with respect to the most recent state of the art Die Behandlung eingetretener Spat­ schaden durch korrigierende Eingriffe und Rehabilitation wurde daher zum Teil nur angedeutet we present a novel approach to combine polymer chain statistical models It is only quite recently that the advent of both comparatively cheap comput ing power and novel quantum chemistry approaches have provided feasible routes to calculate the chemical shift at the ab initio level for molecules of reasonable size