Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France; Unité de Biotechnologie des Algues, Biological Engineering Department, National School of Engineers of Sfax, University of Sfax, Sfax, Tunisia.
Université Clermont Auvergne, CNRS, SIGMA Clermont, Institut Pascal, F-63000 Clermont-Ferrand, France.
Carbohydr Polym. 2018 Oct 15;198:589-600. doi: 10.1016/j.carbpol.2018.06.098. Epub 2018 Jun 30.
A fucoidan (CCF) and a sodium alginate (CCSA) were extracted and purified from the Tunisian brown seaweed Cystoseira compressa. CCF was a highly sulfated heterogalactofucan composed of α-(1→3), α-(1→4)-linked l-Fucp as main backbone which could be highly branched (31.84%) at O-3 and O-4 positions of α-(1→4)-l-Fucp and α-(1→3)-l-Fucp by terminal monosaccharides and side chains such as terminal α-l-Fucp, terminal β-d-Galp, β-d-Galp-(1→3)-α-l-Fucp and β-d-Galp-(1→4)-α-l-Fucp. The ratio of α-(1→3)/α-(1→4) linkages was estimated at 3.86:1. CCSA was characterized by HPAEC-PAD, GC/MS-EI, ATR-FTIR, and H-NMR. The M/G ratio was M/G = 0.77, indicating that CCSA respectively contained 44% and 56% of mannuronic and guluronic acids. The values of F, F, F (or F) blocks as well as the parameter η were estimated. The two polysaccharides exhibited effective antioxidant activities by ferrous ion chelation, ferric ion reduction and DPPH radical-scavenging, outlining their potentials as natural additives.
从突尼斯褐藻 Cystoseira compressa 中提取并纯化了一种岩藻聚糖（CCF）和一种海藻酸钠（CCSA）。CCF 是一种高度硫酸化的杂半乳聚糖，由α-(1→3)、α-(1→4)-连接的 l-Fucp 作为主要骨架组成，其在 O-3 和 O-4 位置可高度支化（31.84%）通过末端单糖和侧链，如末端α-l-Fucp、末端β-d-Galp、β-d-Galp-(1→3)-α-l-Fucp 和β-d-Galp-(1→4)-α-l-Fucp。α-(1→3)/α-(1→4)键的比例估计为 3.86:1。CCSA 的特征在于 HPAEC-PAD、GC/MS-EI、ATR-FTIR 和 H-NMR。M/G 比为 M/G=0.77，表明 CCSA 分别含有 44%和 56%的甘露糖醛酸和古洛糖醛酸。还估计了 F、F、F（或 F）块以及参数 η 的值。这两种多糖通过亚铁离子螯合、铁离子还原和 DPPH 自由基清除表现出有效的抗氧化活性，这表明它们具有作为天然添加剂的潜力。
