Effects of different drying methods on quality of sea horse Hippocampus based on low-field nuclear magnetic resonance technology
WU Jingna1,2, CHEN Xiaoting3, SU Yongchang3, QIAO Kun3, CHEN Bei3, LIU Zhiyu3*
1.Xiamen Key Laboratory of Marine Medicinal Natural Products Resources, Xiamen Medical College, Xiamen 361023, China; 2.Fujian Universities and Colleges Engineering Research Center of Marine Biopharmaceutical Resources, Xiamen Medical College, Xiamen 361023, China; 3.Fisheries Research Institute of Fujian, Xiamen 361013, China
Abstract: In order to explore the effect of different drying methods on quality characteristics of sea horse Hippocampus, the drying performance, shrinkage rate and moisture distribution were measured and analyzed in longnose sea horse Hippocampustrimaculatus with wet body mass of 2.5-3.0 g dried by 100 ℃ hot air drying, 40 ℃ cold air drying, vacuum freeze-drying (-26--30 ℃, 0.1 kPa) and vacuum drying (70 ℃, 133 kPa). The results showed that the drying performance and shrinkage rate of longnose sea horse were significantly affected by different drying methods (P<0.05). The better drying performance was observed in hot air drying and vacuum drying, with the time consumption of 15 h, and energy consumption of 4.03 kW·h/kg in the hot air drying and 10 h, 2.46 kW·h/kg in the vacuum hot air drying, and the minimal shrinkage rate in vacuum freeze-drying. Low field nuclear magnetic resonance detection revealed that the moisture content was decreased in different drying methods, primarily due to the decrease in the content of immobilized water and free water. The change in the rehydration process of longnose sea horse showed that the immobilized water was increased continuously, and the faster rehydration speed was found in the hot air drying and vacuum freeze drying. It is concluded that drying and vacuum drying are characterized by short time and energy saving, and that the sea horse treated by vacuum freeze-drying has high quality and good rehydration performance.
吴靖娜, 陈晓婷, 苏永昌, 乔琨, 陈贝, 刘智禹. 基于低场核磁共振技术对不同干燥方式的海马品质研究[J]. 大连海洋大学学报, 2021, 36(3): 495-502.
WU Jingna, CHEN Xiaoting, SU Yongchang, QIAO Kun, CHEN Bei, LIU Zhiyu. Effects of different drying methods on quality of sea horse Hippocampus based on low-field nuclear magnetic resonance technology. Journal of Dalian Ocean University, 2021, 36(3): 495-502.
2021, Vol. 36 
