Measurements of water transport in a gel by Overhauser magnetic resonance imaging

Overhauser imaging in a magnetic field of 16 mT was employed study of water transport during the drying process of an agar gel. The data illustrate important aspects of Overhauser imaging, such as the large sensitivity to small changes of local moisture, which may be attainable under appropriate con...

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Bibliographic Details
Published in:Measurement science & technology 1998-12, Vol.9 (12), p.1982-1988
Main Authors: Sousa, P L de, Engelsberg, M, Matos, M A, Colnago, L A
Format: Article
Language:English
Subjects:
Diffusion in solids
Drying
Exact sciences and technology
Gels
General equipment and techniques
Hygrometers
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Mass transfer
Moisture determination
Nondestructive examination
Physics
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Summary:Overhauser imaging in a magnetic field of 16 mT was employed study of water transport during the drying process of an agar gel. The data illustrate important aspects of Overhauser imaging, such as the large sensitivity to small changes of local moisture, which may be attainable under appropriate conditions. The non-Fickian nature of the water transport process can be clearly inferred from the measured moisture profiles.
ISSN:0957-0233
1361-6501
DOI:10.1088/0957-0233/9/12/009