Article citationsMore >>

Budiman, M., Stroshine, R.L., and Cornillon, P. Moisture measurement in cheese analogue using stretched and multi-exponential models of the magnetic resonance T2 relaxation curve. Journal of Dairy Research, 69, 619-632, 2002.

has been cited by the following article:

Article

Effect of Fat Content on Water Sorption Properties of Biscuits Studied by Nuclear Magnetic Resonance

1Jiangnan University, Wuxi, P.R. China

2Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, Wuxi, P.R. China

3Rochester Institute of Technology, 78 Lomb Memorial Drive, Rochester, NY 14623, USA


Journal of Food and Nutrition Research. 2014, Vol. 2 No. 11, 814-818
DOI: 10.12691/jfnr-2-11-9
Copyright © 2014 Science and Education Publishing

Cite this paper:
Fa-yi Hao, Li-xin Lu, Chang-feng Ge. Effect of Fat Content on Water Sorption Properties of Biscuits Studied by Nuclear Magnetic Resonance. Journal of Food and Nutrition Research. 2014; 2(11):814-818. doi: 10.12691/jfnr-2-11-9.

Correspondence to: Li-xin  Lu, Jiangnan University, Wuxi, P.R. China. Email: lulx@jiangnan.edu.cn

Abstract

Moisture sorption isotherm is a well established method to characterize water sorption properties and behavior of food materials. However, this approach doesn’t adequately reflect the molecular mobility that taking place during water sorption process. Nuclear magnetic resonance (NMR) can provide information about the water mobility and molecular interactions between water and food components. The biscuits with different fat addition were studied using water sorption isotherm and 1H low-field NMR at and water activity ranging from 0.2 to 0.90, the changes in equilibrium moisture content, transverse relaxation time(T2) and proton intensity of biscuits were defined. The T2 were measured with Carr-Purcell-Meiboom-Gill (CPMG) sequences. It was demonstrated that fat content of biscuits influenced directly the equilibrium moisture content and water status. One or two water populations were observed as the water activity increased, each of which had a distinct relaxation time T2 or molecular mobility. The relaxation time manifested that with the increase of fat addition, the water inside the samples became more mobile, and proton intensity indicated that the amount of water uptake decreased with increasing fat addition. The low-field NMR was demonstrated to provide complementary interpretation to that of water sorption isotherm.

Keywords