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NONDESTRUCTIVE MEASUREMENT of TRANSIENT MOISTURE PROFILES and the MOISTURE DIFFUSION COEFFICIENT IN A POTATO DURING DRYING and ABSORPTION BY NMR IMAGING
Author(s) -
RUAN RONGSHENG,
SCHMIDT SHELLY J.,
SCHMIDT ARTHUR R.,
LITCHFIELD J. BRUCE
Publication year - 1991
Publication title -
journal of food process engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.507
H-Index - 45
eISSN - 1745-4530
pISSN - 0145-8876
DOI - 10.1111/j.1745-4530.1991.tb00139.x
Subject(s) - moisture , transient (computer programming) , diffusion , materials science , absorption (acoustics) , analytical chemistry (journal) , nuclear magnetic resonance , composite material , chemistry , thermodynamics , chromatography , physics , computer science , operating system
A nondestructive method to measure the internal moisture distribution and to determine the effective moisture diffusion coefficient for a potato during drying and absorption was developed using NMR imaging and numerical modeling techniques. the coefficients obtained were 1.04 to 7.28 × 10 −10 m 2 /s, for moisture contents between 40% and 55% (wb), during drying with a sample temperature of 40°C; and were 9.78 × 10 −12 to 2.33 × 10 −11 m 2 /s, for moisture contents between 56% and 60%, during absorption at 23°C.