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> Kungliga Tekniska Högskolan
> (2002)
> Forskningsöversikt
> Dvinskikh Sergey V. >
NMR methods applied...
Abstract
Ämnesord
Stäng
- The methodology of NMR experiments intended to measure anisotropic diffusion is reviewed. Experiments of this kind preferably require oriented samples and/or orientation-dependent spin coupling and/or magnetic field gradients in different directions. One strategy of diffusion experiments in anisotropic systems with broad NMR lines employs line narrowing techniques, thereby allowing for efficient gradient encoding/decoding. Depending on the nuclei, spin couplings and samples, the preferred methods vary from decoupling through echo techniques to magic angle sample orientation and spinning. Another avenue to efficient gradient encoding/decoding is through very strong magnetic field gradients. Either way, anisotropic diffusion reveals new structural features as illustrated by a few selected examples in liquid crystals and in biological tissues.
Nyckelord
- NMR
- self-diffusion
- diffusion tenser magnetic resonance imaging
- orientation
- alignment
- spin decoupling
- magic echo
- activation energy
- obstruction
- restricted diffusion
- zeolite
- thermotropic liquid crystal
- lyotropic liquid crystal
- surfactant
- lipid
- biomembrane
- tissue
- intracellular and extracellular water
- white matter
- muscle
- pulsed-field-gradient
- nuclear-magnetic-resonance
- lyotropic liquid-crystals
- water self-diffusion
- spin-echo nmr
- studying translational diffusion
- lipid lateral diffusion
- pgse nmr
- diblock copolymer
- skeletal-muscle
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