Bioactive hemicelluloses alkali-extracted from Fallopia sachalinensis leaves
| Autor: | Smestad Paulsen Berit, Zdenka Hromádková, Anna Ebringerová, Zuzana Košťálová |
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| Rok vydání: | 2014 |
| Předmět: |
DPPH
Alkalies Polysaccharide Biochemistry Analytical Chemistry chemistry.chemical_compound Polysaccharides Glucuronoxylan Organic chemistry Animals Hemicellulose Food science chemistry.chemical_classification Sheep Organic Chemistry Extraction (chemistry) General Medicine Complement System Proteins Free Radical Scavengers Hydrogen-Ion Concentration Alkali metal Polygonaceae Xyloglucan Plant Leaves chemistry Fallopia sachalinensis |
| Zdroj: | Carbohydrate research. 398 |
| ISSN: | 1873-426X |
| Popis: | Fallopia sachalinensis, regarded as an invasive plant in Europe and designated for disposal, is traditionally used in Japan and China as herbal medicine. Attempted for valorization of the leaves, this paper reports on two protein-free polysaccharide fractions, a neutral (FS-5A) and an acidic (FS-5B) one, obtained via alkali extraction and consecutive purification. Both fractions were characterized by chemical, molecular, structural and bioactive properties. FTIR and 1D/2D NMR analyses revealed that FS-5A consisted of a fucogalactoxyloglucan, whereas, glucuronoxylan was the major hemicellulose in FS-5B accompanied with low proportions of fucosylated xyloglucan and pectic RG-I. Both hemicellulose fractions exhibited significant immunostimulating activity in the complement-fixation test and the latter had noticeable DPPH radical-scavenging ability. The results completed information about neutral and acidic bioactive polysaccharide components present in the leaves of F. sachalinensis. |
| Databáze: | OpenAIRE |
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