Effect of Modified Atmosphere Packaging on Quality of Dried-Salted Mullet Roe

• Main Authors: Chuang, Kuo Hung, 莊國宏
• Other Authors: Chingmin E. Tsai
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/17310036383570347020

碩士 === 輔仁大學 === 食品營養學系 === 82 === The dried salted mullet roe from cultured source browned during storage faster than that from wild source. The study was to investigate the effects of modified atmosphere packaging on the quality and storage stability of mullet roe product. Samples were packed in an aluminum laminated pouch or nylon laminated pouch filled with N2 and 0, 20 or 50 % O2 respectively, and exposed to 1,000 lux fluorescent light at 5℃ for 8 weeks. The samples in oxygen filled packages showed that L-value reduced and △E-value increased, unsaturated fatty acids reduced, conjugated diene, triene and carbonyl oxidative products increased comparing with the ones in nitrogen filled packages. More severe browning and lipid oxidation were found in the samples with oxygen than without oxygen. It was also observed that light accelerated browning and lipid oxidation in the study. Oxygen could inhibit the reduction of TMAO and reduce the amount of amino compounds, but it caused serious lipid oxidation to produce a large amount of carbonyl compounds, so enhanced browning. Carbonyl compounds might play an important role on the browning reaction in mullet roe. Therefore, the more serious lipid oxidation, the more serious browning in mullet roe occured. Oxygen reduced the contents of carotenoids, so caused discoloration of mullet roe. From the data of physical and chemical analyses and also sensory evaluation, it was revealed that L value, △E and carbonyl value could be used as indicators for the quality of mullet roe. The trends of color and the degree of lipid oxidation of wild mullet roe were similar to those of cultured mullet roe. The pH values of wild mullet roe were lower than cultured mullet roe. The conclusion of this study suggested that mullet roe could be packaged in an aluminum laminated pouch with nitrogen filled to maintain its quality.