## Abstract The ^1^H NMR spectra of imidazo [1,2β__a__]pyrimidine derivatives have been analysed to study the aromatic character and protonation behaviour of this system. By employing the βring currentnβ model and calculations based on the coupled HartreeβFock method it can be deduced that a large
β¦ LIBER β¦
A proton nuclear magnetic resonance study of the physical changes in growing plant cell walls
β Scribed by Julia C. Wallace; Alex L. MacKay; Ken Sasaki; Iain E. P. Taylor
- Publisher
- Springer-Verlag
- Year
- 1993
- Tongue
- English
- Weight
- 392 KB
- Volume
- 190
- Category
- Article
- ISSN
- 0032-0935
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β¦ Synopsis
Changes in broadline proton nuclear magnetic resonance parameters of cell walls during growth of etiolated hypocotyls of bean (Phaseolus vulgaris L.) indicate that cell wall structure becomes more rigid during development. Most of the changes are completed in the first 6 cm below cotyledon insertion and are correlated with increased restriction of proton movements in regions of dense polymer packing.
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