TEMPERATURE MAPPING IN A MODEL FOOD GEL USING MAGNETIC-RESONANCE-IMAGING

被引:12
作者
SUN, XZ
LITCHFIELD, JB
SCHMIDT, SJ
机构
[1] UNIV ILLINOIS,DEPT AGR ENGN,905 S GOODWIN AVE,367 BEVIER HALL,MC-180,URBANA,IL 61801
[2] UNIV ILLINOIS,DIV FOODS & NUTR,URBANA,IL 61801
关键词
MODEL; FOOD GEL; TEMPERATURE MAPPING; NMR; MRI;
D O I
10.1111/j.1365-2621.1993.tb03236.x
中图分类号
TS2 [食品工业];
学科分类号
0832 ;
摘要
Two dimensional temperature maps of a model food gel (agar, microcrystalline cellulose, and water, 1.95:6.55:200), were obtained by MRI during heating and cooling. The molecular pseudo self-diffusion coefficient of water was used as a temperature indicator. A two dimensional Fourier transform spin-echo imaging sequence was used for data acquisition. The self-diffusion coefficient at room temperature was 1.26 x 10(-3) mm2/sec. Two dimensional self-diffusion images were obtained, and temperature images were calculated. The error in MRI measurements, due to noise and temperature variation, was less than 1-degrees-C with 1.5 mm2 resolution. The average variation between MRI and thermocouple measurements was < 1.26-degrees-C. This new noninvasive technique can be used to study heat transfer and to measure thermal properties of foods.
引用
收藏
页码:168 / &
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