title: A size-adjustable radiofrequency coil for investigating plants in a Halbach magnet.
abstract: A radio-frequency coil with adjustable distance has been developed and tested for in-situ examination of growing plants. The Helmholtz-based coil design reduces laborious tuning and matching efforts encountered with solenoids wound around a growing stem or branch. Relaxation experiments were performed on tomato plants and winter wheat under controlled light irradiation. Changes in signal amplitude and in relaxation times T2were recorded over day and night cycles. Peaks in distributions of relaxation times were attributed to different tissue components of two different plants.
authors.affiliation: Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University, Worringer Weg 2, D-52074 Aachen, Germany.
authors.forename: Dirk
authors.initials: D
authors.lastname: Oligschläger
authors.affiliation: Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University, Worringer Weg 2, D-52074 Aachen, Germany. Electronic address: rehorn@itmc.rwth-aachen.de.
authors.forename: Christian
authors.initials: C
authors.lastname: Rehorn
authors.affiliation: Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University, Worringer Weg 2, D-52074 Aachen, Germany.
authors.forename: Sören
authors.initials: S
authors.lastname: Lehmkuhl
authors.affiliation: Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University, Worringer Weg 2, D-52074 Aachen, Germany.
authors.forename: Michael
authors.initials: M
authors.lastname: Adams
authors.affiliation: Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University, Worringer Weg 2, D-52074 Aachen, Germany.
authors.forename: Alina
authors.initials: A
authors.lastname: Adams
authors.affiliation: Institut für Technische und Makromolekulare Chemie (ITMC), RWTH Aachen University, Worringer Weg 2, D-52074 Aachen, Germany.
authors.forename: Bernhard
authors.initials: B
authors.lastname: Blümich
mesh_terms: D002940:Circadian Rhythm; D008027:Light; D018551:Solanum lycopersicum / Q000033:anatomy & histology / Q000528:radiation effects; D059346:Magnets; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000295:instrumentation / Q000379:methods*; D018515:Plant Leaves / Q000033:anatomy & histology; D018547:Plant Stems / Q000033:anatomy & histology; D010944:Plants / Q000033:anatomy & histology*; D011846:Radio Waves; D014908:Triticum / Q000033:anatomy & histology / Q000528:radiation effects; D014867:Water / Q000737:chemistry
chemical_list: D014867:Water
keywords: Coils; Day night cycles; Halbach magnet; Plants; Relaxometry