Natural-abundance 13C T1 and NOE measurements have been made for backbone and side-chain sites in peptide fragments of transthyretin (TTR 10-20, TTR 105-115, and TTR 105-115Met111) at 13C Larmor frequencies of 125 and 75 MHz. These peptides have previously been implicated in the formation of amyloid
13C NMR relaxation study on molecular motion of n-alkane chains in the rotator phase
β Scribed by Shinji Ishikawa; Isao Ando
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 322 KB
- Volume
- 273
- Category
- Article
- ISSN
- 0022-2860
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## Abstract The ^13^C nuclear relaxation behaviour of __n__βalkyl chains in a variety of compounds can be described in terms of two relaxation times, one for tumbling (Ο~c~) and one for each carbon nucleus for the internal motions (Ο~c~). Relaxation data for the quaternary carbon nuclei of __n__βoc
Reorientational and angular momentum correlation tmes \(\tau_{c}\) and \(t_{f}\) for \(\mathrm{CCl}_{4}\) and \(\mathrm{CS}_{2}\) in alh anes hate been derived from \({ }^{13} \mathrm{C}\) spin-spin relasetion times of \(\mathrm{CCl}_{4}\) and \({ }^{33} \mathrm{~S}\) linew idths of \(\mathrm{CS}_{2
i3C NMR spectra of a few odd-member alkane dicarboxylic acids such as glutaric and pimelic acids have been studied across their phase transitions. The spectra provide clear evidence for the structural changes accompanying the transitions. In the case of malonic acid, the study establishes that the t