IMPACT OF HIGH HYDROSTATIC PRESSURE ON PHYSICOCHEMICAL CHARACTERISTICS, NUTRITIONAL CONTENT AND FUNCTIONAL PROPERTIES OF CAPE GOOSEBERRY PULP (PHYSALIS PERUVIANA L.)

摘要

The aim of this research was to assess the effect of high hydrostatic pressure (HHP) treatments (300, 400 and 500 MPa/5 min) on physicochemical, nutritional and functional properties of Cape gooseberry pulp immediately after processing and after 30 days of refrigerated storage. Results showed that HHP as well as storage time clearly influenced sugars, vitamin C, β-carotene, mineral contents and antioxidant capacity. However, the physicochemical characteristics were not influenced by HHP. Pressurization led to a significant increase in fructose and glucose at 300–500 MPa both on day 0 and day 30 (P < 0.05). Potassium content increased 8–10% at 300 and 500 MPa, while phosphorus content increased 65% compared with control sample at 400 MPa at day 0 (P < 0.05). The antioxidant activity (2,2-diphenyl-1-picrylhydrazyl) increased after 30 days of storage in pres- surized samples at 300 and 500 MPa. A maximum antioxidant activity value was observed at 300 MPa by means of the oxygen radical absorbance capacity analysis (P < 0.05).