Chemical and 13C-n.m.r. studies of an arabinogalactan from Larix sibirica L.
✍ Scribed by Štefan Karácsonyi; Vladimír Kováčik; Juraj Alföldi; Marta Kubačková
- Publisher
- Elsevier Science
- Year
- 1984
- Tongue
- English
- Weight
- 722 KB
- Volume
- 134
- Category
- Article
- ISSN
- 0008-6215
No coin nor oath required. For personal study only.
✦ Synopsis
An arabinogalactan isolated from the wood of Lark sibirica L. was investigated by methylation analysis, partial hydrolysis, enzymic oxidation, and 13C-n.m.r. spectroscopy. The structural conclusions arrived at by 13C-n.m.r. spectroscopy were consistent with the data from methylation analysis. The polysaccharide is highly branched and similar in structure to those of arabino-3,6-galactans isolated from other Lark species.
📜 SIMILAR VOLUMES
The 13C-{1H}-n.m.r. spectra (acidic D,O, pD -1) of N-methyl-l-deoxynojirimycin (1,5-dideoxy-1,5-methyliminium-D-glucitol), an inhibitor of processing cx-D-glucosidases involved in glycopeptide biosynthesis, showed two isomers (-11:l ratio) differing in the stereochemistry of the N+DCH3 group. Assig
The n.1n.r. spectra of forty alkoxysilanes of the general type X,Si(OR),-,
## ABsTRAcr The EDTA-extracted pectins from flax, which were fractionated by exclusion chromatography according to size, contained galactose, galacturonic acid, rhamnose , glucose, and traces of arabinose. The main components of the major fraction, a high-molecular-weight galactan, were +4)-p-Galp
The oligosaccharide part of an N-linked triantennary glycopeptide from calf fetuin with fourteen carbohydrate residues and its smaller derivatives obtained by successive enzymic cleavage of the terminal residues were investigated using 2D 1H-n.m.r. (500 MHz) and 13C-n.m.r. (125 MHz) spectroscopy. As
The chemical shifts and line-shapes of cross-polarisation-magic-angle sample spinning . 13C-n m-r. resonances have been analysed for p-nitrophcnol, p-hydroxybenzoic acid, benzoic acid, and m-nitrophenol in the solid state and likewise for inclusion complexes with host cyclomalto-hexaose and -heptaos