%0 Journal Article
%T The Effect of Juicing Methods on the Phytochemical and Antioxidant Characteristics of the Purple Prickly Pear (Opuntia ficus indica)〞Preliminary Findings on Juice and Pomace
%A Caroline A. Gouws
%A Duane D. Mellor
%A Ekavi Georgouopoulou
%A Nenad Naumovski
%J -
%D 2019
%R https://doi.org/10.3390/beverages5020028
%X Abstract Prickly Pear (PP) is often overlooked due to its＊ short shelf-life. Juicing may improve marketability but often affects quality, thereby warranting investigation. Purple PP (whole (WF) and flesh (FF)) was juiced using blenders; stick (SB) and jug (JB); and juicers; commercial (CJ) and cold-pressed (CP). Juices and methanolic (70%) pomace extracts were analysed for; bioactives; Total Phenolic (TPC; 米gGAE/mL), Flavonoid (TFC; 米gCE/mL) and Betalain Content (TBC; mg/100 g; Betacyanin; BE; Betaxanthin; IE); and antioxidant characteristics; DPPH, FRAP (米MTE) and vitamin C (mgAAE/mL). Juicing techniques had effects on phytochemicals in; juice: TPC (WF/FF; p = 0.022每0.025), TFC (FF; p = 0.034), Betacyanin (WF/FF; p = 0.029每0.026), FRAP (WF/FF; p = 0.016每0.024) and Vitamin C (WF/FF; p = 0.015每0.016); and pomace: TPC (WF/FF; p = 0.015), TBC (FF; p = 0.034), Betacyanin (FF; p = 0.047), Betaxanthin (FF; p = 0.017), DPPH (WF/FF; p = 0.016每0.024), FRAP (WF/FF; p = 0.015每0.023) and Vitamin C (WF/FF; p = 0.016每0.022). Processing-style (blend/juice) affected; TPC, DPPH and FRAP in juice and pomace. Overall, fruit-preparation (WF/FF) had minimal effects. Additionally, correlations existed between; juice TFC and TBC (p = 0.001; 而 = ˋ0.044); TBC and vitamin C (p = 0.001; 而 = ˋ0.637); pomace TPC and DPPH (p = 0.003; 而 = 0.440), TPC and vitamin C (p = 0.011; 而 = 0.440); and TFC and FRAP (p = 0.001; 而 = 0.519). The best methods overall for juice were SB (FRAP), JB (TPC, TBC), CJ (TFC) and CP (DPPH, VitC); and for pomace extracts; SB(FRAP), JB (TPC, VitC), CJ(TFC), and CP (TBC, DPPH). View Full-Tex
%K juice
%K phytochemical
%K Opuntia ficus indica
%K Prickly Pear
%K cold pressed
%U https://www.mdpi.com/2306-5710/5/2/28