花椒黄酮提取液-壳聚糖复合保鲜涂膜剂制备及其对圣女果保鲜效果评价

Preparation of Zanthoxylum bungeanum flavonoids extracting solution-chitosan composite fresh-keeping coating and evaluation of its preservation effect on cherry tomatoes

以花椒黄酮提取液、壳聚糖作为复合保鲜涂膜剂制备材料,在单因素试验基础上,采用Box-Behnken试验设计安排试验,以花椒黄酮提取液及壳聚糖溶液浓度为自变量,加速货架期试验后圣女果质量保持率、硬度、可溶性糖及VC含量等指标的加权综合评分为响应值,利用BP(Back Propagation)神经网络结合遗传算法对复合保鲜涂膜剂配比进行优化研究;将按较优配比制备的复合保鲜涂膜剂对圣女果进行涂膜处理,分别在4、25℃下贮存,定时抽样检测,评价其保鲜效果。结果表明,复合保鲜涂膜剂较优制备条件为:花椒黄酮提取液浓度0.5283 mg/mL、壳聚糖溶液浓度0.6957%,两者复配比例1:1(v/v);贮存试验结果显示,其对圣女果保鲜效果良好。研究结果可为该涂膜剂在果蔬保鲜领域的应用提供参考。

Zanthoxylum bungeanum flavonoids extracting solution and chitosan were used as preparation materials of composite fresh-keeping coating.Based on single-factor experiments,Box-Behnken experimental design was employed with factors being the concentrations of Zanthoxylum bungeanum flavonoids extraction and chitosan solution.the weighted comprehensive scores of quality retention rate,hardness,soluble sugar and VC content of accelerated shelf-life experimenting cherry tomatoes were used as response value.BP neural network combined with genetic algorithm were used to optimize the ratio of composite fresh-keeping coating.Cherry tomatoes were coated with the composite fresh-keeping coating prepared according to the optimal ratio,which were stored at 4 and 25℃respectively,the preservation effect was evaluated by regular sampling inspection.The results showed that the optimum preparation conditions of composite fresh-keeping coating were as follows:concentration of Zanthoxylum bungeanum flavonoids extracting solution 0.5283 mg/mL,concentration of chitosan solution 0.6957%,and the composition ratio was 1:1(v/v).The results of storage experiment showed that it had good fresh-keeping effect on cherry tomatoes.These results could provide reference for the application of the coating in the field of fruit and vegetable preservation.