NEW PHASE TRANSITION PHENOMENA OF DL-2-AMINO BUTANOIC ACID-WATER SYSTEM AND DL-NORLEUCINE-WATER SYSTEM

摘要

DSC measurements of transition of DL-2-amino butanoic acid(DL-ABA) and of DL-norleucine(DL-NL) containing water were made. It was found that peak temperature obtained in transition of DL-ABA-water system was independent of water content and was 359 K compared with the B-A transition temperature, 506 K, whereas the peak temperature of DL-NL-water system was nearly equal to 390 K in solid-solid phase transition. [References: 7]