کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1385042 982428 2008 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Structural characterization of cold extracted fraction of soluble sulfated polysaccharide from red seaweed Gracilaria birdiae
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Structural characterization of cold extracted fraction of soluble sulfated polysaccharide from red seaweed Gracilaria birdiae
چکیده انگلیسی

Water soluble polysaccharide from Gracilaria birdiae cultivated along the northeast coast of Brazil was characterized by infrared (FT-IR) and nuclear magnetic resonance (NMR) spectroscopy. The composition of the polysaccharide in wt% was determined as: β-d-galp (50.3%), 3,6-anhydro-α-l-galp (40.5%) and -α-l-galp-6 sulfate (9.2%). The ratio of l/d units (β-d-galp units and 3,6-anhydro-α-l-galp + α-l-galp-6 sulfate) is that of an ideal agarose. The sulfate content calculated by S% accounts for 6.4%. 1D and 2D NMR techniques were employed in order to assign the spin system of polysaccharide without partial degradation. The structure is composed of → 4-3,6-anhydro-α-l-galp (1 → 3)β-d-galp 1 → segments, with the possibility of a α-l-galp unit substituted at the 6-position by sulfate ester.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 71, Issue 4, 7 March 2008, Pages 559–565
نویسندگان
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