Chung, Yi-LinYi-LinChungHSI-MEI LAI2018-09-102018-09-102004-09http://www.scopus.com/inward/record.url?eid=2-s2.0-9244231194&partnerID=MN8TOARShttp://scholars.lib.ntu.edu.tw/handle/123456789/307960A two-gelatin-gel model system was used to investigate the water status of two gels with different Aw, 0.968 (H-gel) and 0.828 (L-gel), using magnetic resonance imaging (MRI) techniques. A multi slice-multi echo pulse sequence was applied and the transverse relaxation time (T2) of water protons was calculated. During storage the average T2 values of H-gel decreased, while those of L-gel increased. However, at the end of storage (15 days) when the Aw of two gels were the same, the average T2 values of L-gel were larger than those of H-gel, and heterogeneous T2 values were observed in both gels. This was due to water migration between the two gels and redistribution of water in each gel during storage. The two-gelatin-gel model system and nondestructive MRI technique established in this study offer a good method to monitor moisture redistribution between gels with different Aw and to investigate the water status and structural changes in food systems during storage.Gelatin gelMagnetic resonance imaging (MRI)Transverse relaxation time (T2)Water activity (Aw)Water statusjournal article2-s2.0-9244231194WOS:000224329000005