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Methodical issues of investigations with laboratory NMR relaxometer
Proceedings, 2016Pulsed nuclear magnetic resonance (NMR) is one of the most perspective methods for studying reservoir properties of the core samples. This report analyzes the methodological issues of laboratory studies with a portable NMR relaxometer. We propose a method and software for NMR experiment parameters selection, providing the highest level of the observed ...
L. Muravyev, S. Zhakov
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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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Helical Spring Stress Relaxometer
Rubber Chemistry and Technology, 1957Abstract Changes in the tensile properties of rubber are obviously of great practical importance. Consequently, measurements of the change in force required to maintain or produce a given extension under controlled conditions of temperature and atmosphere have frequently been made and have advanced our understanding of the physical process of ...
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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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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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Untuned MPI relaxometer for nanoparticle characterization at arbitrary frequencies
2015 5th International Workshop on Magnetic Particle Imaging (IWMPI), 2015MPI resolution and SNR are driven by the magnetic response of the iron oxide nanoparticles. Prior work has shown that magnetic nanoparticles respond differently to a wide range of excitation frequencies and amplitudes. Most prior work on MPI spectrometers and relaxometers have tuned the transmit coil at a single frequency.1-3 In contrast, in this work,
Zhi Wei Tay +3 more
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An NMR Relaxometer for Measuring Age-Related Muscle Loss
Biomedical Engineering, 2021The paper describes a table-type NMR-relaxometer for measuring spin-spin relaxation times of protons in living tissues. The proton spin relaxation times depend on the average number of paramagnetic centers in the medium under study; in particular, they are indicative of the difference in the intensity of the metabolic processes in the cellular ...
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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 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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