Characterization of a thermally induced irreversible conformational transition of amylose tris(3,5-dimethylphenylcarbamate) chiral stationary phase in enantioseparation of dihydropyrimidinone acid by quasi-equilibrated liquid chromatography and solid-state NMR - Dowling, Thomas M.; Mueller, Karl T.; Santos, Ivan.; Wang, Fang.; Wenslow, Robert M., Jr.; Wyvratt, Jean M.