Analysis of Polymer Materials by Surface NMR via the MOUSE

Guthausen, Andreas; Zimmer, G.; Blümler, Peter; Blümich, Bernhard

doi:10.1006/jmre.1997.1282

Cited by 91 publications

(52 citation statements)

References 15 publications

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“…5 A number of interesting applications have been demonstrated, including determination of fat content in live Atlantic salmon, 6 one-dimensional imaging of heterogeneous rubbers, 7 characterisation of polymer materials, 8 self-diffusion measurements, 9 tendon anisotropy studies 10 and detection of water ingress in model aerospace composites. 11 Unilateral NMR has other advantages over a traditional benchtop time domain NMR.…”

Section: Introductionmentioning

confidence: 99%

Rapid determination of the fat content in packaged dairy products by unilateral NMR

et al. 2008

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BACKGROUND: Knowledge of the fat content in dairy products is important for both industry and consumers. A new procedure for rapid and non-destructive determination of the fat content in dairy products using unilateral nuclear magnetic resonance (NMR) is proposed. The sample magnetisation is prepared using either T 1 suppression or diffusion editing, and read out via a Carr-Purcell-Meiboom-Gill (CPMG) pulse sequence.

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Section: Introductionmentioning

confidence: 99%

Rapid determination of the fat content in packaged dairy products by unilateral NMR

et al. 2008

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“…The interest in such devices, as potential standalone or complementary alternatives to conventional magnetic resonance imaging (MRI), arises from the obvious advantages of lower costs, portability, access to immovable arbitrary-sized objects, and scanning in the field. Mobile NMR measurements of, for example, relaxation times or MRI are currently conducted for applications within the materials sciences [13]- [20]. Recently, advances in methodology and hardware construction have allowed for high-resolution NMR spectroscopy in one-sided, portable NMR systems [21], [22].…”

Section: Introductionmentioning

confidence: 99%

Least Squares Magnetic-Field Optimization for Portable Nuclear Magnetic Resonance Magnet Design

et al. 2008

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Single-sided and mobile nuclear magnetic resonance (NMR) sensors have the advantages of portability, low cost, and low power consumption compared to conventional high-field NMR and magnetic resonance imaging (MRI) systems. We present fast, flexible, and easy-to-implement target field algorithms for mobile NMR and MRI magnet design. The optimization finds a global optimum in a cost function that minimizes the error in the target magnetic field in the sense of least squares.When the technique is tested on a ring array of permanent-magnet elements, the solution matches the classical dipole Halbach solution. For a single-sided handheld NMR sensor, the algorithm yields a 640 G field homogeneous to 16 100 ppm across a 1.9 cm 3 volume located 1.5 cm above the top of the magnets and homogeneous to 32 200 ppm over a 7.6 cm 3 volume. This regime is adequate for MRI applications. We demonstrate that the homogeneous region can be continuously moved away from the sensor by rotating magnet rod elements, opening the way for NMR sensors with adjustable "sensitive volumes."

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“…A variety of applications to materials [5,6], well-logging [7], imaging [8] and in vivo NMR [9] have been made possible. However, the large line-broadening caused by the intrinsic terms of "real" ex-situ analysis.…”

Section: Introductionmentioning

confidence: 99%

Variable rotation composite pulses for high resolution nuclear magnetic resonance using inhomogeneous magnetic and radiofrequency fields

Sakellariou

Meriles

Moulé

et al. 2002

Chemical Physics Letters

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An approach toward high-resolution NMR spectroscopy on samples located outside the physical confines of a magnet (Ex-situ NMR), has recently been described [1].Nutation echoes are generated by a train of z-rotation pulses in the presence of spatially matched static and radio-frequency field gradients. These pulses were based on a combination of perfect π/2 constant rotation composite pulses and "imperfect" ordinary pulses of variable length. Here we introduce a new class of "self-compensated" z-rotation composite pulses based only on variable rotation inversion pulses that lead to an rf dependent phase shift. Experiments and simulations show that these new pulses perform well at high B 0 gradients and require less rf power than previous schemes.

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Analysis of Polymer Materials by Surface NMR via the MOUSE

Cited by 91 publications

References 15 publications

Rapid determination of the fat content in packaged dairy products by unilateral NMR

Rapid determination of the fat content in packaged dairy products by unilateral NMR

Least Squares Magnetic-Field Optimization for Portable Nuclear Magnetic Resonance Magnet Design

Variable rotation composite pulses for high resolution nuclear magnetic resonance using inhomogeneous magnetic and radiofrequency fields

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