摘要:
该研究提取了乌鳢浸养水体中的分泌多糖,制取了乌鳢皮、磷和骨中的黏多糖,并对两类多糖的单糖组成和抗氧化活性等性质进行了分析.结果表明:两类多糖粗提物中分泌多糖含量较高,为66.5%;黏多糖含量为37.9%.分泌多糖主要由半乳糖382.0μg/mg、阿拉伯糖353.0μg/mg和鼠李糖87.7 μg/mg组成,此外还含有少量的甘露糖25.3 μg/mg.黏多耱的单糖组成较为复杂,可定性和定量的单糖有葡萄稽醛酸88.6μg,/mg、葡萄糖胺78.8μg/mg、半乳糖63.9 μg/mg、半乳糖醛酸44.3μg/mg、木糖39.4 μg/mg、葡萄糖22.0 μg/mg、鼠李糖16.4 μg/mg、甘露糖7.8 μg/mg、阿拉伯糖7.4 μg/mg.分泌多糖表现出显著的还原能力、DPPH自由基清除能力、羟自由基清除能力、ABTS自由基清除能力,且与浓度显著性正相关(P<0.05);黏多糖具有显著的羟自由清除能力,但其还原能力、DPPH自由基清除能力、ABTS·清除效果不明显.%The polysaccharide secretion in the water from the fish and mucopolysaccharide from Channa argus skin,scale and bones were extracted.The antioxidation and monosaccharides composition of the polysaccharides were investigated.Results showed that the polysaccharide was 66.5% and mucopolysaccharide was 37.9% in the extraction.The secretion of polysaccharide mainly contained galactose (382.0 μg/mg),arabinose (353.0 μg/mg),rhamnose (87.7 μg/mg) and mannose (25.3 μg/mg).While glucuronic acid (88.6 μg/mg),glucosamine (78.8 μg/ mg),galactose (63.9 μg/mg),galacturonic acid (44.3 μg/mg),xylose (39.4 μg/mg),glucose (22.0 μg/mg),rhamnose (16.4 μg/mg),fucose (7.8 μg/mg),arabinose (7.4 μg/mg) were determined from mucopolysaccharide.The secretion of polysaccharide showed significant reducing power,DPPH-scavenging activity,OH-scavenging activity,ABTS-scavenging activity.The antioxidant activities were correlated well with the polysaccharide concentrations (P < 0.05).Mucopolysaccharide showed significant OH-scavenging activity.However,reducing power,DPPH-scavenging activity and ABTS-scavenging activity were not obvious.