Journal
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
Volume 60, Issue 6, Pages 1419-1427Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jf204853b
Keywords
C-13 CP; SELDOM; spin diffusion; plant cell wall; corn stover
Funding
- BioEnergy Science Center
- Office of Biological and Environmental Research in the DOE Office of Science
- U.S. Department of Energy [DE-AC05-00OR22725]
Ask authors/readers for more resources
The average spatial dimensions between major biopolymers within the plant cell wall can be resolved using a solid-state NMR technique referred to as a C-13 cross polarization (CP) SELDOM (selectively by destruction of magnetization) with a mixing time delay for spin diffusion. Selective excitation of specific aromatic lignin carbons indicates that lignin is in close proximity to hemicellulose followed by amorphous and finally crystalline cellulose C-13 spin diffusion time constants (T-SD) were extracted using a two site spin diffusion theory developed for C-13 nuclei under magic angle spinning (MAS) conditions. These time constants were then used to calculate an average lower limit spin diffusion length between chemical groups within the plant cell wall. The results on untreated C-13 enriched corn stover stem reveal that the lignin carbons are, on average, located at distances similar to 0.7-2.0 rum from the carbons in hemicellulose and cellulose; whereas the pretreated material had larger separations.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available