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Observation of Molecular Relaxation Behavior of Glucose Powders with Different Structures and Particle Sizes Using Low Field Nuclear Magnetic Resonance (NMR)  

Chung, Myung-Soo (Research Center, Ottogi Corporation)
Publication Information
Korean Journal of Food Science and Technology / v.34, no.6, 2002 , pp. 1140-1144 More about this Journal
Abstract
Molecular relaxation behaviors of crystalline glucose anhydrous, crystalline glucose monohydrate, and amorphous glucose with different particle sizes were observed by measuring spin-spin relaxation time constant $(T_2)$ at the temperature range of $-20\;to\;110^{\circ}C$ using temperature-controlled low field nuclear magnetic resonance spectroscopy. No change in $T_2$ values of crystalline glucose anhydrous was observed throughout the temperature range, whereas $T_2$ values of crystalline glucose monohydrate and amorphous glucose increased from around $45\;and\;65^{\circ}C$, respectively. These results indicate that molecular mobility of crystalline glucose anhydrous does not change even at temperature higher than $100^{\circ}C$ and that the stability of powdered glucose could be improved by increasing the particle size of materials.
Keywords
molecular relaxation behaviors; molecular mobility; powdered glucose; particle size; spin-spin relaxation time constant $(T_{2})$; nuclear magnetic resonance;
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