Proton transverse magnetization decay curves of rice flour starch-water samples were measured and analysed for the presence of four components in the relaxation curve. T-2 values were interpreted on the basis of the diffusive and chemical exchange model that provided evidence for extra granular bulk water and three more water populations whose relaxation rate is governed by diffusive and chemical exchange with starch components. The analysis of relaxation data provided information on dynamics of water molecules as well as on the size and dispersion of diffusive domains. Furthermore, by measuring solid to liquid ratio, transverse and longitudinal relaxation curves of starch-water mixtures at increasing temperatures - from 20 to 77 degrees C - swelling and gelatinisation processes were monitored.

Proton NMR relaxation study of swelling and gelatinisation process in rice starch-water samples / Ritota, Mena; Gianferri, Raffaella; Bucci, Remo; Brosio, Elvino. - In: FOOD CHEMISTRY. - ISSN 0308-8146. - STAMPA. - 110:1(2008), pp. 14-22. [10.1016/j.foodchem.2008.01.048]

Proton NMR relaxation study of swelling and gelatinisation process in rice starch-water samples

RITOTA, Mena;GIANFERRI, Raffaella;BUCCI, Remo;BROSIO, Elvino
2008

Abstract

Proton transverse magnetization decay curves of rice flour starch-water samples were measured and analysed for the presence of four components in the relaxation curve. T-2 values were interpreted on the basis of the diffusive and chemical exchange model that provided evidence for extra granular bulk water and three more water populations whose relaxation rate is governed by diffusive and chemical exchange with starch components. The analysis of relaxation data provided information on dynamics of water molecules as well as on the size and dispersion of diffusive domains. Furthermore, by measuring solid to liquid ratio, transverse and longitudinal relaxation curves of starch-water mixtures at increasing temperatures - from 20 to 77 degrees C - swelling and gelatinisation processes were monitored.
2008
rice starch; low-resolution NMR; proton relaxation times; swelling; gelatinisation
01 Pubblicazione su rivista::01a Articolo in rivista
Proton NMR relaxation study of swelling and gelatinisation process in rice starch-water samples / Ritota, Mena; Gianferri, Raffaella; Bucci, Remo; Brosio, Elvino. - In: FOOD CHEMISTRY. - ISSN 0308-8146. - STAMPA. - 110:1(2008), pp. 14-22. [10.1016/j.foodchem.2008.01.048]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/229433
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