## 摘要

We study the concentration dependence of spin-lattice relaxation rates, T _{1} ^{-1}, of glucose, fructose, sucrose and cherries by using high-T _{c} SQUID-based NMR at magnetic fields of ∼97 μT. The detected NMR signal, S_{y} (T _{Bp}), is fitted to [1 - exp(-T _{Bp}/T _{1})] to derive T _{1} ^{-1}, where S_{y} (T _{Bp}) is the strength of the NMR signal, T _{Bp} is the duration of pre-polarization and T _{1} ^{-1} is the spin-lattice relaxation rate. It was found that T _{1} ^{-1} increases as the sugar concentrations increase. The increased T _{1} ^{-1} is due to the presence of more molecules in the surroundings, which increases the spin-lattice interaction and in turn enhances T _{1} ^{-1}. The T _{1} ^{-1}versus degrees Brix curve provides a basis for determining unknown Brix values for cherries as well as other fruits.

原文 | 英語 |
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文章編號 | 084006 |

期刊 | Superconductor Science and Technology |

卷 | 30 |

發行號 | 8 |

DOIs | |

出版狀態 | 已發佈 - 2017 7月 5 |

## ASJC Scopus subject areas

- 陶瓷和複合材料
- 凝聚態物理學
- 金屬和合金
- 電氣與電子工程
- 材料化學

## 指紋

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