کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
1389828 982927 2017 9 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
The gel-forming polysaccharide of psyllium husk (Plantago ovata Forsk)
ترجمه فارسی عنوان
پلی ساکارید تشکیل دهنده ژل از پوسته پسیلیوم (Plantago ovata Forsk)
کلمات کلیدی
موسیلاژ اسفرزه درخت چنار ؛ پلی ساکارید پسیلیوم. آرابینوزایلن؛ 3-O-β-D-Xylopyranosyl-L-آرابینوز
Plantago ovata mucilage; Psyllium seed polysaccharide; Arabinoxylan; 3-O-β-d-Xylopyranosyl-l-arabinose
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

The physiologically active, gel-forming fraction of the alkali-extractable polysaccharides of Plantago ovata Forsk seed husk (psyllium seed) and some derived partial hydrolysis products were studied by compositional and methylation analysis and NMR spectroscopy. Resolving the conflicting claims of previous investigators, the material was found to be a neutral arabinoxylan (arabinose 22.6%, xylose 74.6%, molar basis; only traces of other sugars). With about 35% of nonreducing terminal residues, the polysaccharide is highly branched. The data are compatible with a structure consisting of a densely substituted main chain of β-(1 → 4)-linked d-xylopyranosyl residues, some carrying single xylopyranosyl side chains at position 2, others bearing, at position 3, trisaccharide branches having the sequence l-Araf-α-(1 → 3)-d-Xylp-β-(1 → 3)-l-Araf. The presence of this sequence is supported by methylation and NMR data, and by the isolation of the disaccharide 3-O-β-d-xylopyranosyl-l-arabinose as a product of partial acid hydrolysis of the polysaccharide.

The physiologically active component of psyllium husk is shown to be a highly branched, neutral arabinoxylan with the suggested partial structures:Figure optionsDownload full-size imageDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Research - Volume 339, Issue 11, 2 August 2004, Pages 2009–2017
نویسندگان
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