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Perspectives in process analytics using low field NMR
Journal of Magnetic Resonance, 2021Low field NMR is a powerful analytical tool which creates an enormous added value in process analytics. Based on specific applications in process analytics and perspectives for low field NMR in form of spectroscopy, relaxation, diffusion, and imaging in quality control, diverse applications and technical realizations like spectrometers, time domain NMR,
Thomas Rudszuck, Gisela Guthausen
exaly +4 more sources
A resistive Q-switch for low-field NMR systems
Journal of Magnetic Resonance, 2018An NMR Q-switch was designed and constructed specifically for use with low-field NMR apparatus. This featured a comparatively simple resistive damping design. It served to reduce the r.f. probe ring-down time, and hence reduced the signal acquisition delay from 25 ms to 9 ms, on an Earth's magnetic field NMR system.
Einar O Fridjonsson +2 more
exaly +3 more sources
Magnetic Resonance Imaging, 2010
Although nuclear magnetic resonance in low fields around or below the Earth's magnetic field is almost as old as nuclear magnetic resonance itself, the recent years have experienced a revival of this technique that is opposed to the common trend towards higher and higher fields.
Lutz, Trahms, Martin, Burghoff
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Although nuclear magnetic resonance in low fields around or below the Earth's magnetic field is almost as old as nuclear magnetic resonance itself, the recent years have experienced a revival of this technique that is opposed to the common trend towards higher and higher fields.
Lutz, Trahms, Martin, Burghoff
openaire +2 more sources
Chemical Physics Letters, 2009
Abstract NMR provides outstanding information in chemistry and in medicine. But the equipment is expensive as high-field magnets are employed. Low-field NMR works with inexpensive permanent magnets. Until recently these did not provide fields sufficiently homogeneous for spectroscopy and were mostly used for relaxation measurements.
Bernhard Blümich +2 more
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Abstract NMR provides outstanding information in chemistry and in medicine. But the equipment is expensive as high-field magnets are employed. Low-field NMR works with inexpensive permanent magnets. Until recently these did not provide fields sufficiently homogeneous for spectroscopy and were mostly used for relaxation measurements.
Bernhard Blümich +2 more
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Low field NMR measurements in3He-A
Physica B: Condensed Matter, 1994Abstract We are making simultaneous measurements of the longitudinal and transverse resonances in fields of the order of 30 gauss in a parallel plate geometry, defined by mylar films 100 μm apart, so that l is well oriented perpendicular to the static magnetic field.
T.R. Mullins +4 more
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Physica B+C, 1981
Abstract An adiabatic field cycling technique is used to study the 11 B nmr in the anomalous ternary superconductor YRh 4 B 4 at fields below H c1 .
F.Y. Fradin, P.K. Tse, J.W. Downey
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Abstract An adiabatic field cycling technique is used to study the 11 B nmr in the anomalous ternary superconductor YRh 4 B 4 at fields below H c1 .
F.Y. Fradin, P.K. Tse, J.W. Downey
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Perfusion Measurement with Low Field NMR
2023<p>Blood perfusion is a fundamental parameter of tissue health and function. Measurements of blood perfusion are clinically used to assess the severity of strokes, tumors and other diseases. Nuclear Magnetic Resonance (NMR) is a common modality for these measurements, due to its flexibility, sensitivity and lack of ionising radiation.</p> ...
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Differentiation of fentanyl analogues by low-field NMR spectroscopy
Analytica Chimica Acta, 2019Forensic laboratories commonly receive new psychoactive substances such as fentanyl analogues and other synthetic opioids that are difficult to identify. Slight changes to chemical structures, e.g. shifting the position of functional groups such as methyl groups or halogens on the aromatic ring, may not be distinguished using traditional methods.
Jonathan Duffy +4 more
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Gated cardiac imaging using low-field NMR
Physics in Medicine and Biology, 1986A system for the ECG gating of NMR images is described. It is based on the Aberdeen Mark 1 0.04 T imager and a 280 microprocessor to control data acquisition. The collection of images is discussed including: saturation recovery images; inversion recovery images and phase-encoded images.
D G, Norris, J M, Hutchison
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Theory of multiple-pulse NMR at low and zero fields
Journal of Magnetic Resonance (1969), 1987Coherent averaging with time-dependent magnetic fields at low and zero static magnetic fields encounters several features which are unfamiliar in high-field magnetic resonance. The principal differences are that magnetic field pulses act generally on all spin species in the sample and that the Hamiltonian contains additional terms that are normally ...
Suter, Dieter, Lee, C. J., Pines, A.
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