Application of natural fruit extract and hydrocolloid-based coating to retain quality of fresh-cut melon
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ORIGINAL ARTICLE
Application of natural fruit extract and hydrocolloid-based coating to retain quality of fresh-cut melon Basharat Yousuf1,2
•
Abhaya Kumar Srivastava1 • Saghir Ahmad1
Revised: 6 March 2020 / Accepted: 1 April 2020 Ó Association of Food Scientists & Technologists (India) 2020
Abstract Application of hydrocolloid based edible coatings is widely investigated as a promising means to retain quality and to extend the shelf life of food products. Present investigation was aimed to analyze influence of treatments, with different concentrations of lemon extract (0, 5, 10 and 15)% and coating with (0 and 5)% soy protein isolate (SPI), on fresh-cut melons. After the treatments, the samples were packed in polypropylene containers and kept at 4 °C for quality and shelf life analyses. The study involved 8 combinations of melon samples which were monitored in triplicate on specific days for different quality parameters including headspace gases, physicochemical, sensory and microbiological changes over the storage period. Lowest weight loss was indicated by samples treated with both lemon extract and soy protein isolate. When compared to control, coated samples indicated 4.36 log CFU/g lesser total plate count, and 2.39 log CFU/g lesser yeast and mold count at the completion of storage. Treatments showed effectiveness to retain vitamin C of melon samples. Total soluble solids, pH and titratable acidity varied remarkably through the storage life. Significant differences were observed in sensory attributes of control and coated samples. Chroma and color change (DE) values also reflected the potential of soy protein Abhaya Kumar Srivastava: Deceased. & Basharat Yousuf [email protected] 1
Department of Post-Harvest Engineering and Technology, Faculty of Agricultural Sciences, Aligarh Muslim University, Aligarh 202002, India
2
Department of Food Science and Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai 200240, China
isolate coating to protect foods. Overall, the results suggested that lemon extract and soy protein isolate can help in retaining quality and extending the shelf life of fresh-cut melon. Keywords Hydrocolloid coating Fresh-cut melon Edible coatings Fresh-cut fruits Soy protein isolate Lemon extract The second author ‘‘Abhaya Kumar Srivastava’’ (Associate Professor) lost his life while battling a deadly cancer. He stood brave till the last breath of his life. Even after he was diagnosed with cancer, he wholeheartedly carried out his research and other academic activities. The Department of Post-Harvest Engineering and Technology, Aligarh Muslim University, deeply mourns the sad demise of this great personality and prays for the departed soul.
Introduction Fruits and vegetables constitute a necessary portion of diet for humans. For convenience of consumers, fresh-cut and other minimally processed horticultural products have secured a large part of global market. Many fresh-cut agricultural products are nowadays available
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