Nuclear Magnetic Resonance Imaging of Water Motion in Plants

T.W.J. Scheenen

Promotor: T.J. Schaafsma
Copromotor: H. Van As
Wageningen University
September 21, 2001

Abstract

This Thesis treats one of the new techniques in plant science i.e. nuclear magnetic resonance imaging (NMRi) applied to water motion in plants. It is a challenge to measure this motion in intact plants quantitatively, because plants impose specific problems when studied using NMRi. At high magnetic field strength air-filled intercellular spaces in the plant tissue cause susceptibility-related local magnetic field inhomogeneities, which are much smaller at low magnetic field strength. The inherently low signal-to-noise ratio at low magnetic fields is compensated by the possibility to record a long train of spin-echoes, since generally the spin-spin relaxation time T2 at low magnetic field is longer than at high magnetic field.

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