Similar observations were identified around 3288.61 cm -1 , 2922.90 cm -1 , and 1604.52 cm -1 , corresponding to O-H stretching vibrations, stretching of C-H, carboxylate stretching bands (COO-) functional groups, respectively. The low absorption intensity peak bands of UMP may signify the lower amount compounds contain the functional groups present in UMP compared to WMP. These bands symbolize the presence of carboxylic acid demonstrating strong intermolecular hydrogen bonding of gallic acid, aliphatic compounds containing CH groups, and carbonyl compounds. Further, the fingerprint region peak bands indicate the presence of compounds such as rutin, gallic acid, tannic acid, quercetin, vanillin, and other phenolic compounds , - . In DSC analysis, WMP showed more endothermic nature than UMP. WMP required more heat than UMP in order to maintain the same temperature as reference for completing the experiment. More endothermic nature i.e., positive enthalpy change can lead to more positive or less negative Gibbs free energy , which may signify that WMP would be less spontaneous or less metabolically active or would have lower metabolic rate compared to UMP. It may also signify that WMP can hold lower amount of heat and only would endure lower amount of cold compared to UMP. Further, WMP also showed more exothermic nature than UMP near 220 °C where an exothermic peak was observed for WMP which may be a significance of some heat release from the WMP sample due to any reaction around that particular temperature , . From CHNS elemental analysis, the comparison of elemental composition (CHNS) between WMP and UMP has been accomplished. There were no significant change found between them for Carbon, Hydrogen, and Nitrogen, but Sulphur content found significantly high for WMP, approximately three times more than UMP. The presence of Sulphur may signify the presence of Methionine and Cysteine amino acids which are essential components of proteins and also required for the protein synthesis - . Moreover, the higher Sulphur content in WMP might be one of the possible reasons for the cause of wrinkled peel of mango when over ripened.