中国食品添加剂

以长白山虫草属蛹虫草的胞内与胞外多糖为研究对象,分别检测其体外抗氧化能力。以果蝇种群的半数死亡时间、平均寿命、平均最高寿命及寿命延长率为指标,评价胞内、外多糖对果蝇寿命的影响。试验结果表明:胞内、外多糖具有良好的体外抗氧化能力,且基本随浓度的提高而增强;胞内多糖的高剂量组能显著提高雌性果蝇寿命,延寿率可达11.63%;中、高剂量组均能显著提高雄性果蝇的寿命,延寿率分别达13.20%、16.46%,且对雄性果蝇的延寿作用强于雌性。胞外多糖方面仅中剂量组能显著提高雄性果蝇的寿命,延寿率为9.20%,延寿作用不明显,显著低于胞内多糖。本文通过探究蛹虫草胞内和胞外多糖的抗氧化及延缓衰老的作用,为进一步研发蛹虫草功能性食品提供理论依据。

The effect of intracellular and extracellular polysaccharide of cordyceps militaris of Changbai Mountain on the lifetime of Drosophila melanogaster is studied using indicators of 50 percent individuals lethal date,mean lifespan,maximum lifespan and aging delay rate. Results show that intracellular and extracellular polysaccharide of cordyceps militaris has strong of vitro antioxidant capability and enhanced with increased polysaccharide concentration. The highdose group of intracellular polysaccharide significantly increases lifespan(female)by 11.63%,medium and high dose group both significantly improved lifespan(male)by 13.20% and 16.46%,respectively. The effect is stronger in the case of male than that of female. Only medium dose group significantly improved the lifespan by 9.20%. The effect of extracellular polysaccharide was not obvious,significantly lower than intracellular polysaccharide. In this article,antioxidant and anti-aging effect of intracellular polysaccharide and extracellular polysaccharide were explored,which provide the theory basis for the further research and development of the functional food of cordyceps militaris.