【摘要】 研究了两种相对分子质量的壳聚糖以不同的比例配比所制的保鲜剂对草莓保鲜效果的影响。结果表明 :当相对分子质量为 3万和 1 70 0的两种壳聚糖以 1∶ 1 (质量比 )配比时 ,所制的保鲜剂对草莓有较好的保鲜效果 ,能使草莓果实的失水率、腐烂率和发霉率显著降低 (P<0 .0 1 ) ;果实体内的可溶性固形物、可溶性糖、可溶性蛋白质、Vc等含量以及糖酸比明显增加(P<0 .0 5) ;超氧化物歧化酶 (SOD)活性增强 ,丙二醛 (MDA)含量减少 (P<0 .0 1 ) ,果实细胞膜稳定性显著提高。更多还原

【Abstract】 The effects of two kinds of chitosan mixed with different proportion on strawberry preservation was studied at normal temperature storage. The results showed that 1 700 and 30 000 molecular weight of chitosans mixed at one to one mass ratio has good effects on strawberry preservation.It makes the rate of water loss,mildew and putridity of the strawberry deceased (\%P\%<0 01), the content of soluble solid substance,soluble sugar,soluble protein ,Vc and sugar\|acid ratio in the strawberry fruit increased markedly(\%P\%<0 05),and the activity of SOD enhanced,stablity of the cell membrane improved and the content of MDA reduced(\%P\%<0 01).更多还原