食品科学 ›› 2008, Vol. 29 ›› Issue (9): 66-69.

• 基础研究 • 上一篇    下一篇

利用核磁共振技术研究谷物在储藏过程中的变化

金志强,张锦胜,钱菲,刘玉环,林向阳,阮榕生   

  1. 南昌大学食品科学教育部重点实验室; 福州大学生物科学与工程学院
  • 出版日期:2008-09-15 发布日期:2011-12-08

Study on Changes of Grains during Storage by NMR

 JIN  Zhi-Qiang, ZHANG  Jin-Sheng, QIAN  Fei, LIU  Yu-Huan, LIN  Xiang-Yang, RUAN  Rong-Sheng   

  1. 1. Key Laboratory of Food Science,Ministry of Education,Nanchang University,Nanchang 330047,China; 2. College of Biological Science and Technology,Fuzhou University,Fuzhou 350002,China
  • Online:2008-09-15 Published:2011-12-08

摘要: 利用核磁共振技术CPMG序列测定自旋-自旋弛豫时间T2及其相应的质子密度A21、A22检测17种谷物在室温下的储藏过程中核磁共振驰豫参数的变化规律。研究结果表明,随着储藏时间的延长,弛豫时间对应的质子密度呈现下降的趋势,储藏到3~4个月,出现明显的下降;不同谷物在磁共振上的表现明显不同,可以将17种谷物划分为三类,即耐储藏谷物、较耐储藏谷物和不耐储藏谷物。该项技术快速、无损和对样品没有要求,研究结果可以为食品实际工业生产提供一定的理论指导。

关键词: 核磁共振, CPMG, 弛豫时间, 谷物

Abstract: The spin-spin relaxation time T2 and its proton density A22 and A22 of 17 kinds of grains were measured by the NMR CPMG sequence at room temperature. The results showed that A2 has a continually decreasing tendency with the storage time increasing. And until 34 months it shows the obvious decrease. Different grains have the different characters on NMR, so the grains are devided into three kinds, namely the grains of longest, longer and long period. The NMR technology has the advantages of rapidity, no destruction and no demands on sample. This reseach may provide the theoretical guide for food industry.

Key words: NMR, CPMG, relaxation time, grains