Effect of edible and nano biocompatibility coating on quality property of golden delicious apple during different storage conditions

Three coatings، Carnoba wax، Chitosan and naocomposite، were used to prevent postharvest losses of Golden Delicious apple. The effect of three coatings was compared with uncoated samples on quality and physical properties of apples during storage. These properties were pH، soluble solids (TSS)، color intensity (a، b، L and E coefficients) and density. The variations of quality properties of apples during six months at two conditions of cold storage (2 °C and 95% RH) and environmental storage (20 °C and 45% RH) were evaluated. The results showed that pH، brix and color intensity for three coatings had an ascending trend but density and L had a descending trend in environmental condition. In the environmental condition، the highest color intensity losses were found for the without coating samples and the lowest losses for the wax coating samples. In opposite، color intensity for the wax coating samples had lowest losses. There was no more change in brix trend for nanocomposite coating.