Development of composite plastic film of extract from Ficus carica leaves and the cling film application in keeping melon fresh
[Objective]To explore a non-toxic,safe,green,cheap and easy to obtain plant bacteriostatic material for storage and preservation of melon,and development of composite plastic film of extract from Ficus carica leaves and the cling film application in keeping melon fresh.[Methods]In this study,the extraction process of Ficus carica leaf extract with antibacterial effect was optimized.Response surface methodology was used to optimize the effects of ethanol concentration,ultrasonic time and solid-liquid ratio on the total fla-vonoids yield of Ficus carica leaf extract.The cross method was used to determine the antibacterial effect of the extract on fusarium and Alternaria of melon.The extraction agent of Ficus carica leaf was combined with mem-brane agent sodium alginate,antioxidant citric acid and sucrose ester,and the effects of each preparation on the decay rate and weight loss rate of melon during storage were optimized by orthogonal method.[Results]The optimal extraction parameters of Ficus carica leaf were as follows:ethanol concentration 79.73％,ultrasonic time 36.81 min,solid-liquid ratio 1:24.Through range and variance analysis,the optimal composition of composite cling film for Ficus carica leaf extract of melon was determined as follows:80 mg/mL Ficus carica extract+1.5％sodium alginate+500 mg/L citric acid+0.5％sucrose ester.[Conclusion]Ficus carica leaf extract has a significant effect on inhibiting the main postharvest pathogenic fungi of melon,while Ficus carica leaf extract compound cling film has a significant effect on reducing the decay and weight loss rate of melon,so it can be used as a new green,healthy and low-value plant-derived fresh material for melon stor-age and preservation.
万方数据
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