Abstract
Apples can be considered as having a complex system formed by several structures at different organization levels: macroscale (>100 μm) and microscale (<100 μm). This work implements 2D T1/T2 global and localized relaxometry sequences on whole apples to be able to perform an intensive non-destructive and non-invasive microstructure study. The 2D T1/T2 cross-correlation spectroscopy allows the extraction of quantitative information about the water compartmentation in different subcellular organelles. A clear difference is found as sound apples show neat peaks for water in different subcellular compartments, such as vacuolar, cytoplasmatic and extracellular water, while in watercore-affected tissues such compartments appear merged. Localized relaxometry allows for the predefinition of slices in order to understand the microstructure of a particular region of the fruit, providing information that cannot be derived from global 2D T1/T2 relaxometry.
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Acknowledgments
This publication has been produced with the financial support of the European Union (project FP7-226783-InsideFood). Also, the authors would like to pay tribute to Brian Hills, the admired NMR pioneer who has passed away. This work would have been impossible without him.
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The opinions expressed in this document by no means reflect the official opinion of the European Union or its representatives.
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Melado-Herreros, A., Fernández-Valle, M.E. & Barreiro, P. Non-Destructive Global and Localized 2D T1/T2 NMR Relaxometry to Resolve Microstructure in Apples Affected by Watercore. Food Bioprocess Technol 8, 88–99 (2015). https://doi.org/10.1007/s11947-014-1389-4
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DOI: https://doi.org/10.1007/s11947-014-1389-4