Polycrystalline progesterone (4-pregnene-3,20-dione, C21H30O2) has been investigated by proton NMR methods between 80 and 350 K. A reduction in dipolar second moment is ascribed to methyl group reorientation. Minima in the spin-lattice relaxation time found in measurements at five frequencies from 7
A proton NMR relaxation study of hen egg quality
β Scribed by Luca Laghi; Mauro A. Cremonini; Giuseppe Placucci; Stanislav Sykora; Kevin Wright; Brian Hills
- Publisher
- Elsevier Science
- Year
- 2005
- Tongue
- English
- Weight
- 274 KB
- Volume
- 23
- Category
- Article
- ISSN
- 0730-725X
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## Synopsis Spin-spin and spin-lattice 'H-nmr relaxation times of the sea anemone polypeptide anthopleurin-A were measured at frequencies of 200, 300, 400, and 500 MHz. Relaxation times were fitted iteratively by least squares regression to the isotropic tumbling model, Woessner's model for anisot
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