Magic angle nuclear magnetic resonance

The identification, using analytical microprobe and solid-state magic-angle nuclear magnetic resonance (NM techniques, of aluminosilicate deposits in the cores of the pathognomic senile plaques in the brains of Alzheimer subjects (Candy et al., 1986) has prompted widespread scientific and public concern, and controversy with regard to the possible aetiological role of environmental aluminium and aluminosilicates in senile dementia (Walton, 1991). 

Cross Polarization Magic Angle Nuclear Magnetic Resonance 505... 

Discussions of old and new techniques used to study the surface of silica, including diffuse reflectance Fourier transform (DRIFT) infrared spectroscopy, 29Si cross polarization magic-angle nuclear magnetic resonance (CP MAS NMR) spectroscopy, as pioneered by Maciel and Sindorf... 

A. Stamboulis, R.V. Law, R.G. Hill, Characterisation of commercial ionomer glasses using magic angle nuclear magnetic resonance (MAS-NMR), Biomaterials 25 (2004) 3907-3913. 

Faucon, R, T. Charpentier, A. Nonat and J. C. Petit. 1998b. Triple-quantum two-dimensional Al magic-angle nuclear magnetic resonance smdy of the aluminum incorporation in calcium silicate hydrates. J. Am. Chem. Soc. 120, 12075-12082. 

Nuclear Magnetic Resonance Magic-Angle Spinning... 

Nuclear magnetic resonance (NMR) spectroscopy is most frequently used to analyze liquid samples, but in the magic angle spinning (MAS) mode, this spectroscopy can also be employed to characterize solid catalysts, zeolites in particular [116-120], For example, the 29Si NMR signal can... 

Schaefer, J. and Stejskal, E.O. (1975) Carbon-13 nuclear magnetic resonance of polymers spinning at the magic angle. J. Am. Chem. Soc., 98,... 

Gan, Z. (2001) Satellite transition magic-angle spinning nuclear magnetic resonance spectroscopy of half-integer... 

The Al magic angle spinning nuclear magnetic resonance (MASNMR) spectra were acquired using a 30 pulse at 0.1 sec. intervals. About 5000 to 7000 scans were acquired on a Bruker AM-400. The chemical shift is relative to aluminum nitrate in water solution which contains A1(H20)6. ... 

Nuclear magnetic resonance (NMR) is another powerful technique to study solid acid catalysts. Advanced NMR methods such as magic-angle spinning (MAS) of solids have increased the capability of this technique to study acid sites in solid acid catalysts [80]. For example, H MAS NMR technique performed on the solid catalysts after activation and upon adsorption allows the detection of the signals due to the magnetic resonance of the protons... 

L.B. Moran, J.K. Berkowitz, J.P. Yesinowski, F and P magic angle spinning nuclear magnetic resonance of antiomony (III) doped fluorapatite phosphors Dopant sites and spin diffusion, Phys. Rev. B 45 (1992) 5347-5360. 

Solid-state C variable-amplitude cross polarization magic-angle spinning (VACP/MAS) nuclear magnetic resonance (NMR) spectra were acquired for the sorbitol samples. Proton decoupling was achieved by a two-pulse phase modulation (TPPM) sequence. Identical C spectra were measured for the y-form sorbitol samples, and a representative spectrum is shown in Figure 9. 

K. J. D. MacKenzie and R. H. Meinhold, A Mg magic-angle spinning nuclear magnetic resonance study of the thermal decomposition of magnesium carbonate. /. Mater. Sci. Lett, 1993,12,1696-1698. 

R. Lefort, J. W. Wiench, M. Pruski and J.-P. Amoureux, Optimization of data acquisition and processing in Carr-Purcell-Meiboom-Gill multiple quantum magic angle spinning nuclear magnetic resonance. /. Chem. Phys., 2002,116, 2493-2501. 

MACT MAS-NMR Maximum achievable control technology Magic-angle spinning nuclear magnetic resonance... 

J. Forbes, C. Husted and E. Oldfield, High-field, high-resolution magic-angle samplespinning nuclear magnetic resonance spectroscopic studies of gel and liquid crystalline lipid bilayers and the effects of cholesterol, J. Am. Chem. Soc., 1988, 110, 1059-1065. 

C. Dhalluin, C. Boutillon, A. Tartar and G. Lippens, Magic angle spinning nuclear magnetic resonance in solid-phase peptide synthesis, J. Am. Chem. Soc., 1997, 119, 10494-10500. 

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