## Abstract A simple procedure is presented for the determination of the asymmetry parameter of the electric field gradient, the quadrupole coupling constant, the second‐order quadrupolar shift and the isotropic chemical shift of quadrupolar nuclei with half‐integer spin directly from the experimen
✦ LIBER ✦
Determining temperature in a magic-angle spinning probe using the temperature dependence of the isotropic chemical shift of lead nitrate
✍ Scribed by Guenther Neue; Cecil Dybowski
- Publisher
- Elsevier Science
- Year
- 1997
- Tongue
- English
- Weight
- 277 KB
- Volume
- 7
- Category
- Article
- ISSN
- 0926-2040
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✦ Synopsis
The calibration of temperature in a magic-angle spinning probe with lead nitrate is discussed. The effects of rotation frequency on temperature are demonstrated.
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We have recorded high-resolution l3C-nmr spectra of collagen fibrils in the solid state by the cross-polarization-magic-angle-spinning (CP-MAS) method and analyzed the spectra with reference to those of collagenlike polypetides. We used two kinds of model polypeptides to obtain reference 13C chemica