Effect of microencapsulated extract of pitaya (Hylocereus costaricensis) peel on oxidative quality parameters of refrigerated ground pork patties subjected to UV-C radiation

摘要

The effect of different levels of microencapsulated pitaya peel extracts (100 ppm- MPE100, 1,000 ppm-MPE1000, and 2,000 ppm-MPE2000) on the oxidative stability of refrigerated ground pork patties subjected to UV-C (0.5 J/cm~2) for 10 days was investigated. Ground pitaya peel was microwave-assisted extracted utilizing different factors, and the extract with the highest polyphenol content (2.68 mg GAE/g sample) was microencapsulated and added to ground pork. MPE2000 promoted higher protection (30%) of polyunsaturated fatty acids. All extracts mitigated the increase of protein oxidation in an average value of 1.5 nmol carbonyl/mg protein; however, only MPE2000 hindered the lipid oxidation (about 44%) induced by UV-C up to sixth day. MPE2000 (ΔE = 2.65) and BHT (ΔE = 2.62) had an equal effect on preventing color changes. MPE2000 may be used as a simple and effective natural source to mitigate the adverse effects of UV-C on oxidative stability of ground pork patties.