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Heteronuclear dipol...
Abstract
Ämnesord
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- A pulse sequence is described for the recoupling of heteronuclear dipolar interactions under MAS. The method is similar to the PISEMA experiment, but employs a well-defined amplitude modulation of one of the two radio-frequency fields. The technique is used for measurements of H-1-C-13 dipolar couplings in unoriented solid and liquid-crystalline samples.
Nyckelord
- heteronuclear recoupling
- magic-angle spinning
- cross-polarization
- PISEMA
- liquid crystals
- state nmr-spectroscopy
- inversion spin-exchange
- nuclear-magnetic-resonance
- magic-angle nmr
- cross-polarization
- chemical-shift
- orientational constraints
- membrane-proteins
- rotating solids
- lipid bilayers
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