壳聚糖双胍盐酸盐抑菌活性及其涂膜保鲜圣女果的研究  

Effects of chitosan biguandine hydrochloride coating on storage quality of cherry tomato and its antimicrobial activities

作　　者：陈佳阳[1] 罗永祥[1] 陆旺金[2] 傅夏兵[1] 乐学义[1] 

机构地区：[1]华南农业大学理学院应用化学系,广东广州510642 [2]华南农业大学园艺学院,广东广州510642

出　　处：《食品工业科技》2014年第4期306-309,314,共5页Science and Technology of Food Industry

基　　金：广东省科技计划项目(2011B020310005);华南农业大学211工程基金项目(2009B010100001)

摘　　要：测定了壳聚糖双胍盐酸盐(CGH)对金黄色葡萄球菌、大肠杆菌和番茄丝核菌的抑菌能力;并通过涂膜的方法处理圣女果,测定贮藏过程中果实失重率、硬度、可溶性固形物含量(TSS)、维生素C(VC)含量、细胞膜透性和总酸含量的变化。结果表明,相对于壳聚糖(CTS),CGH对金黄色葡萄球菌、大肠杆菌具有较强的抑菌能力,其最小抑菌浓度(MIC)分别为0.31mg/mL和0.62mg/mL;当CGH浓度达到2.00mg/mL时对番茄丝核菌菌丝生长抑制率可达到100%。以质量浓度为3%的CGH涂膜处理的圣女果在(28±2)℃存放12d后,失重率仅为7.5%,硬度仍有21.121N/cm2,TSS为7.2%,VC含量为21.70mg/100g FW(鲜重),膜渗透率为27.4%,可滴定酸含量为0.35%。与对照(CK)相比,显著保持了果实的品质。The antimicrobial activities of Chitosan biguandine hydrochloride（CGH） against S. Aureus,E. Coli and Rhizoctonia solani Kuhn were studied, respectively. Cherry tomatoes mass -loss ratio, firmness, total soluble solid, V c content, film penetration ratio and soluble acid content was examined attentively after fresh -keeping process with CGH as coating film. The minimal inhibited concentrations （MIC） against S. Aureus and E. Coli were 0.31 and 0.62mg/mL,respectively. CGH at 2.00mg/mL had a total antifungal effect on Rhizoctonia solani Kuhn. CGH with concentration of 3% coated on the cherry tomatoes showed a better preservation effect after 12d storage under （28±2）℃. The mass-loss, firmness, total soluble solid, Vc content, film penetration ratio and soluble acid content were 7.5%, 21.121N/cm2 ,7.2%,21. 70mg/100g FW （fresh weight）, 27.4% and 0.35%, respectively.

关 键 词：壳聚糖双胍盐酸盐 圣女果 抑菌 保鲜 

分 类 号：TS255.3[轻工技术与工程—农产品加工及贮藏工程]