Non-Conventional Time Domain (TD)-NMR Approaches for Food Quality: Case of Gelatin-Based Candies as a Model Food

Date

2022-10-01

Author

Uguz, Sirvan Sultan
Özel, Barış
Grunin, Leonid
Ozvural, Emin Burcin
Oztop, Mecit H.

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© 2022 by the authors.The TD-NMR technique mostly involves the use of T1 (spin-lattice) and T2 (spin-spin) relaxation times to explain the changes occurring in food systems. However, these relaxation times are affected by many factors and might not always be the best indicators to work with in food-related TD-NMR studies. In this study, the non-conventional TD-NMR approaches of Solid Echo (SE)/Magic Sandwich Echo (MSE) and Spin Diffusion in food systems were used for the first time. Soft confectionary gelatin gels were formulated and conventional (T1) and non-conventional (SE, MSE and Spin Diffusion) TD-NMR experiments were performed. Corn syrups with different glucose/fructose compositions were used to prepare the soft candies. Hardness, °Brix (°Bx), and water activity (aw) measurements were also conducted complementary to NMR experiments. Relaxation times changed (p < 0.05) with respect to syrup type with no obvious trend. SE/MSE experiments were performed to calculate the crystallinity of the samples. Samples prepared with fructose had the lowest crystallinity values (p < 0.05). Spin Diffusion experiments were performed by using Goldman–Shen pulse sequence and the interface thickness (d) was calculated. Interface thickness values showed a wide range of variation (p < 0.05). Results showed that non-conventional NMR approaches had high potential to be utilized in food systems for quality control purposes.

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85139811648&origin=inward
https://hdl.handle.net/11511/100892

Journal

Molecules

DOI

https://doi.org/10.3390/molecules27196745

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Graduate School of Natural and Applied Sciences, Article

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Use of non-conventional time domain (td) nmr approaches for characterisation of gelatin based soft candies Uğuz, Şirvan Sultan; Öztop , Halil Mecit; Özvural , E. Burçin; Department of Food Engineering (2020-8) TD-NMR technique mostly involves the use of T1 (spin-lattice) and T2 (spin-spin) relaxation times to explain the changes occurring in food systems. However, these relaxation times are affected from many factors and might not always be the best indicators to work with in food related TD-NMR studies. In this thesis, to our knowledge, the non-conventional TD-NMR approaches of Solid Echo/Magic Sandwich Echo and Spin Diffusion in food systems were used for the 1st time. As the system of interest, soft conf...
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Citation Formats

S. S. Uguz, B. Özel, L. Grunin, E. B. Ozvural, and M. H. Oztop, “Non-Conventional Time Domain (TD)-NMR Approaches for Food Quality: Case of Gelatin-Based Candies as a Model Food,” Molecules, vol. 27, no. 19, pp. 0–0, 2022, Accessed: 00, 2022. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85139811648&origin=inward.