Use of low-field-NMR and MRI to characterize water mobility and distribution in pacific oyster (Crassostrea gigas) during drying process
Use of low-field-NMR and MRI to characterize water mobility and distribution in pacific oyster (Crassostrea gigas) during drying process
复制标题
使用低场 NMR 和 MRI 来表征干燥过程中太平洋牡蛎 (Crassostrea gigas) 中的水分流动性和分布
DOI：
10.1080/07373937.2017.1359839
复制
发表时间：
2018-01-01
影响因子：
3.3
通讯作者：
Tan, Mingqian
中科院分区：
文献类型：
--
作者：
Cheng, Shasha;Zhang, Tan;Tan, Mingqian
摘要利用低场核磁共振（LF-NMR）和磁共振成像（MRI）技术研究了太平洋牡蛎干燥过程中水分的流动和分布。实验结果表明，吸附剂的加入降低了本体水、固定水和自由水的迁移率，并显著地去除了固定水。T2加权像显示牡蛎在干燥过程中水分从外表面向内部中心逐渐减少。此外，总水分含量与T22和A22之间的相关系数分别为0.9777和0.9832。主成分分析表明，基于松弛数据可以对牡蛎的干燥程度进行监测。结果表明，低频核磁共振和核磁共振成像技术在研究牡蛎干燥过程中水分流动和分布方面具有很大的潜力。
ABSTRACT Low-field nuclear magnetic resonance (LF-NMR) and magnetic resonance imaging (MRI) were used to monitor the water mobility and distribution of Pacific oyster during drying process. The results show the mobilities of bulk, immobilized, and free water were reduced, and the immobilized water was removed dramatically. T2-weighted images displayed the water decrease from the external surface to inner center of oyster during drying. In addition, excellent correlations between the total moisture content and T22 and A22 were observed with coefficients 0.9777 and 0.9832, respectively. Principal component analysis showed the drying degree of oyster could be monitored based on raw relaxation data. Thus, the result revealed that LF-NMR and MRI have great potential in assessing water mobility and distribution in oyster during drying process.