Changes in physicochemical properties and enzymes associated with ripening of snake tomato (Trichosanthes Cucumerina L.) fruit

Effect of Storage Conditions on Antioxidant Enzymes and Polyphenol Oxidase Activity of African Star Apple Juice

“…pH is important for PPO to achieve maximum activity. The results obtained in this study correspond correctly with those found in African bush mango (Irvingia gabonensis) and snake tomato (Trichosanthes cucumerina) juice (Sanni, 2010;Dabesor et al, 2022). Dabesor et al (2022) reported that differences in optimum pH for PPO activity depended on the plant sources, extraction methods, enzyme purity, buffers, and substrates.…”

“…The results obtained in this study correspond correctly with those found in African bush mango (Irvingia gabonensis) and snake tomato (Trichosanthes cucumerina) juice (Sanni, 2010;Dabesor et al, 2022). Dabesor et al (2022) reported that differences in optimum pH for PPO activity depended on the plant sources, extraction methods, enzyme purity, buffers, and substrates. However, the enzyme showed activity in all the pH investigated (3-12), which may prove that pH may not be effective in the inactivation of the activity of the enzyme at the levels tested as the storage period increased.…”

“…Polyphenol oxidase activity was determined by measuring the initial rate of quinone formation, as indicated by an increase in absorbance at 475 nm (Coseteng and Lee, 1987). One unit of enzyme activity was defined as the amount of enzyme that caused a change in absorbance of 0.001 per minute (Dabesor et al, 2022). The sample cuvette contained 0.7 ml of 10 mM 3,4dihydrophenylalanine solution in 0.1 M phosphate buffer (pH 6.8) and 0.3 ml of the enzyme solution while the blank contained only 0.7 ml of 10 mM 3,4dihydrophenylalanine and 0.3 ml of 0.1 M buffer solution.…”

Impact of Bacterial Cellulose Nanocrystals-Gelatin/Cinnamon Essential Oil Emulsion Coatings on the Quality Attributes of ‘Red Delicious’ Apples

“…Cell-wall modifications that occur during maturing and ripening of fruit tissues include decreased cell-cell adhesion, reduced apoplastic pH, depolymerization and solubilization of pectins and hemicelluloses, and a general increase in cell-wall flexibility and porosity [50]. A key enzyme involved in cell-wall degradation and associated with textural changes during apple ripening is polygalacturonase (PG) [51]. Accordingly, the lower tissue softening for the coated samples compared to the uncoated ones could be explained in terms of the curbed C 2 H 4 production, in agreement with what was obtained by Sahraei Khosh Gardesh et al [4] and Zhang et al [20].…”

African Star Apple Juice Stored at Tropical Ambient and Refrigeration Temperatures: Effect on Physicochemical Characteristics, Antioxidant Properties and Microbiological

“…In the developing countries, more attention is paid to valueaddition and healthy-nutrition promotion when developing any food product (Enujiugha, 2000;Talabi et al, 2023). In this regard, tropical fruits and commonly available vegetables are among the most important foods, as they are not only nutritive but are also indispensable for the maintenance of health (Dabesor et al, 2022;Wong et al, 2003), marking them out as functional ingredients in food preparations. They also contribute to dietary diversity, especially in countries that rely heavily on monotonous starchy meals and porridges (Enujiugha, 2020).…”