【摘要】 采用滤纸扩散法研究10种微藻粗多糖对细菌和真菌的抑菌作用,对抑菌作用明显的微藻粗多糖提取物,进一步研究其抗氧化活性.结果表明:10种微藻粗多糖提取物中,海水小球藻(Marine chlorella vulgaris)的粗多糖提取物抑菌能力最好,其粗多糖提取物对大肠杆菌(Escherichia coli)、藤黄八叠球菌(Micrococcus luteus)、假丝酵母(Monilia albican)、金黄色葡萄球菌(Staphylococcus aureus)的抑菌圈直径分别达13.0、8.0、11.0、10.0,mm.进一步研究其抗氧化活性,1,1-二苯基-2-三硝基苯肼(DPPH)自由基清除能力最高为61.2%,,超氧阴离子清除能力最高达到74.47%,,羟基自由基清除能力最大为75.37%,,抗脂质过氧化能力最高达74.32%,.更多还原

【Abstract】 This research studied the anti-microbial capacity of crude polysaccharide extracs from ten species of microalgae by using filter paper diffusion method,and the antioxidant activities of the optimized crude polysaccharide extracts were investigated. The results showed that the crude polysaccharide extracts from Marine chlorella vulgaris had more significant anti-microbial capacity and antioxidant activities than that of other microalgae. The inhibition zone of the crude polysaccharide against Escherichia coli,Micrococcus luteus,Monilia albican and Staphylococcus aureus were 13.0,mm,8.0,mm,11.0,mm and 10.0,mm,respectively. The antioxidant activities of the optimized crude polysaccharide extracts to eliminate DPPH free radical,superoxide anion radical,hydroxyl radical and anti-lipid peroxidation were up to 61.2%,,74.47%,,75.37%, and 74.32%,,respectively.更多还原