Two-dimensional shift-correlated (COSY) and J-resolved NMR spectroscopy was used to identify and assign resonance in the aliphatic region (0.8 to 4.5 ppm) of the 1H spectrum of acid extracts and tissue of rat brain. The chemical shift and spin-spin coupling constants of several resonances, which cou
The assignment of imidazolium N-1H peaks in the 1H NMR spectrum of a protein by one- and two-dimensional NOE experiments
โ Scribed by Xinjie Wu; William M Westler; John L Markley
- Publisher
- Elsevier Science
- Year
- 1984
- Weight
- 249 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0022-2364
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The measurement of two-dimensional COSY and TOCSY 'H NMR spectra of aqueous solutions with elimination of the water resonance by the water attenuation by transverse relaxation (WATR) method is described. With the WATR method the water resonance can be completely and selectively eliminated, allowing
## Data acquisition time of 0.17 s, an average 'JCH of 170 Hz, 256 increments with 32 transients per increment, a delay of 1.5 s between transients and data were processed as a 2048 x 512 matrix using sine-bell functions for weighting and zero-filling in both domains. Spectral widths of 0.5 and 3 k
## Abstract Three prenylflavanones, sigmoidins A, B and C, were studied using oneโ and twoโdimensional NMR techniques. The interpretation of these spectra led to the definitive assignments of all carbon and hydrogen chemical shifts.