1. THE EFFECT OF SOLVENT AND TEMPERATURE ON PROTONATION CONSTANTS OF DL-PHENYLALANINE IN DIFFERENT AQUEOUS SOLUTIONS OF METHANOL AT DIFFERENT TEMPERATURES. Authors: NILOOFAR SOLTANI AHMADI, FARHOUSH KIANI, SEYED-AHMAD SHAHIDI, AZADE GHORBANI-HASANSARAEI, FATEMEH ZABIHI, FARDAD KOOHYAR.