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Current source of a FFC NMR relaxometer linearly controlled
2013 15th European Conference on Power Electronics and Applications (EPE), 2013A Fast Field Cycling (FFC) Nuclear Magnetic Resonance (NMR) relaxometer combines optimized magnets (low volume and power losses) and power apparatus that integrate power supplies and control methods. The magnet of a FFC NMR relaxometer determines the requirements of the main power supply.
A. Roque +3 more
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A Multiple-Unit Stress Relaxometer
Textile Research Journal, 1954The application of an improved resistance-wire strain gage [3] to a multiple-unit instrument for the measurement of stress relaxation in single fibers is described. Forces are autographically recorded with a precision and accuracy of better than 3 mg. or 1/2% of full scale.
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Comparison of different coil topologies for an MPI relaxometer
2015 5th International Workshop on Magnetic Particle Imaging (IWMPI), 2015Magnetic Particle Imaging (MPI) has gained a variety of potential applications since its first introduction in 2005 [1]. It offers safe tracers with applications in angiography, stem cell tracking, and cancer imaging [2]. The response of superparamagnetic iron oxide (SPIO) nanoparticles strongly affects the quality of the MPI images, which is a unique ...
Mustafa Utkur, Emine Ulku Saritas
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Dynamic Stress Relaxometer, a New Processability Instrument
Rubber Chemistry and Technology, 1976Abstract Increasing demands for economical, efficient, and high-production output rates require better control on processing methods in the factory. Good processing depends very much upon the uniformity of materials at each stage of the operation.
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Digital Control of an FFC NMR Relaxometer Power Supply
2020The fast field cycling (FFC) experimental technique allows to overcome a technical difficulty associated with the nuclear magnetic resonance (NMR) signal-to-noise ratio (SNR) at low frequency spin-lattice relaxation measurements when using conventional NMR spectrometers. Constituting a step forward than the classical analog approaches, in this paper, a
Rúben J. A. Lopes +4 more
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Anesthesia & Analgesia, 2002
The neuromuscular transmission module (M-NMT) is an integrated piezoelectric motion sensor module incorporated in the AS/3(TM) anesthesia monitor. We compared the neuromuscular block of 0.6 mg/kg rocuronium (twice the 95% effective dose) monitored by the M-NMT with that monitored by the Relaxometer mechanomyograph (MMG).
Ashraf A, Dahaba +3 more
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The neuromuscular transmission module (M-NMT) is an integrated piezoelectric motion sensor module incorporated in the AS/3(TM) anesthesia monitor. We compared the neuromuscular block of 0.6 mg/kg rocuronium (twice the 95% effective dose) monitored by the M-NMT with that monitored by the Relaxometer mechanomyograph (MMG).
Ashraf A, Dahaba +3 more
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Dynamic behavior of two power supplies for FFC NMR relaxometers
2012 IEEE International Conference on Industrial Technology, 2012The main power supply of a FFC NMR relaxometer can be based on different topologies. Its design has been done having as a basic reference the parameters of a magnet specially designed and optimized, and the magnet current that is needed to achieve a magnetic induction of 0.2 T. Due to the particularities of this magnet, the FFC power supplies must have
Antonio Roque +6 more
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Design and construction of a high sensitivity self-shielded relaxometer
2015 5th International Workshop on Magnetic Particle Imaging (IWMPI), 2015An MPI spectrometer [1-3] measures the harmonics generated when a nonlinear SPIO is excited by a sinusoidal field. The harmonic peak spectrum allows for comparing SPIOs spatial resolution, since the harmonics are related to the modulation transfer function of the MPI imaging PSF [4-5].
Daniel Hensley +5 more
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Resolving chemical shift spectra with a low-field NMR relaxometer
Chemical Physics Letters, 2004Abstract The possibility of obtaining high-resolution NMR spectra with a relaxometer at comparatively low and weakly inhomogeneous constant magnetic field is demonstrated experimentally. By modifying the radio frequency coil to produce a linear B 1 field, apparent free induction decay signals can be observed by stroboscopic acquisition of ...
L. Grunin, B. Blümich
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Using NMR Relaxometer in the Study of Unconventional Rocks Characteristics
SPE Russian Oil and Gas Exploration & Production Technical Conference and Exhibition, 2014Abstract NUCLEAR MAGNETIC RESONANCE (NMR), NMR RELAXOMETER, STRUCTURE OF VOID SPACE, "FRITILLARY", "WEATHERING CRUST", "BAZHENITE" (OIL SHALES), BI-MODAL NMR DISTRIBUTION, ROUTINE CAPILLARY METHODS This paper presents the results of NMR studies of structure of void space of rocks from unconventional reservoirs.
V. Vavilin +3 more
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