Compară metode
Examinează metodele selectate una lângă alta; rândurile care diferă sunt evidențiate.
| NOESY× | Secvența spin-echo (ecou de spin)× | |
|---|---|---|
| Domeniu | Spectroscopie | Spectroscopie |
| Familie | Process / pipeline | Process / pipeline |
| Anul apariției≠ | 1981 | 1950 |
| Autorul original≠ | Richard Ernst | Erwin Hahn |
| Tip≠ | Two-dimensional pulse sequence | Spectroscopic pulse sequence |
| Sursa seminală≠ | Aue, W. P., Bartholdi, E., & Ernst, R. R. (1976). Two-dimensional spectroscopy. Application to nuclear magnetic resonance. The Journal of Chemical Physics, 64(5), 2229-2246. DOI ↗ | Hahn, E. L. (1950). Spin echoes. Physical Review, 80(4), 580-594. DOI ↗ |
| Denumiri alternative≠ | NOE spectroscopy, 2D NOESY, NOE NMR | CPMG pulse sequence, spin-echo NMR |
| Înrudite≠ | 3 | 4 |
| Rezumat≠ | Nuclear Overhauser Enhancement Spectroscopy (NOESY) is a 2D NMR technique that detects through-space dipolar coupling between protons, rather than through-bond scalar coupling. Introduced by Macura and Ernst in 1981, NOESY reveals which protons are spatially close in the three-dimensional structure, independent of bonding connectivity. This makes NOESY invaluable for determining molecular conformation, assigning stereochemistry, and elucidating protein folds. | The spin-echo is a fundamental nuclear magnetic resonance (NMR) pulse sequence technique introduced by Erwin Hahn in 1950. It uses a 90-degree radiofrequency pulse followed by a 180-degree refocusing pulse to create an echo, effectively reversing the effects of magnetic field inhomogeneities and allowing accurate measurement of spin relaxation properties. This technique is essential in modern NMR spectroscopy for both one-dimensional and multidimensional experiments. |
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