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Structural characterization and rheological behavior of a heteroxylan extracted from Plantago notata Lagasca (Plantaginaceae) seeds

Abstract : Plantago notata (Plantaginaceae) is a spontaneous plant from Septentrional Algerian Sahara currently used by traditional healers to treat stomach disorders, inflammations or wound healing. A water-soluble polysaccharide, called PSPN (PolySaccharide fraction from Plantago Notata), was extracted and purified from the seeds of this semi-arid plant. The structural features of this mucilage were evaluated by colorimetric assays, Fourier transformed infrared spectroscopy (FT-IR), gas chromatography coupled to mass spectrometry (GC/MS) and 1H/13C Nuclear Magnetic Resonance (NMR) spectroscopy. PSPN is a heteroxylan with a backbone composed of β-(1,3)-d-Xylp and β-(1,4)-d-Xylp highly branched, through (O)-2 and (O)-3 positions of β-(1,4)-d-Xylp by various side chains and terminal monosaccharides such as α-l-Araf-(1,3)-β-d-Xylp, β-d-Xylp-(1,2)-β-d-Xylp, terminal Xylp or terminal Araf. The physico-chemical and rheological analysis of this polysaccharide in dilute and semi diluted regimes showed that PSPN exhibites a molecular weight of 2.3 × 106 g/mol and a pseudoplastic behavior.
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https://hal.uca.fr/hal-01658292
Contributor : Guillaume Pierre Connect in order to contact the contributor
Submitted on : Thursday, December 7, 2017 - 3:06:17 PM
Last modification on : Saturday, June 25, 2022 - 9:51:41 AM

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Fatima Benaoun, Cédric Delattre, Zakaria Boual, Alina-Violeta Ursu, Christine Gardarin, et al.. Structural characterization and rheological behavior of a heteroxylan extracted from Plantago notata Lagasca (Plantaginaceae) seeds. Carbohydrate Polymers, Elsevier, 2017, 175, pp.96 - 104. ⟨10.1016/j.carbpol.2017.07.056⟩. ⟨hal-01658292⟩

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