Inactivation of polyphenol oxidase and peroxidase activity in mangosteen pericarp via blanching: correlation between anthocyanins and enzyme activities

Mangosteen pericarp (MP), rich in polyphenols and antioxidants, is often discarded as agro-waste. Its anthocyanins (ACNs), potential natural colourants, are compromised by high polyphenol oxidase (PPO) and peroxidase (POD) activity. This study examined the effects of hot water and steam blanching on...

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Published in:International journal of food science & technology 2025-01, Vol.60 (1)
Main Authors: Ijod, Giroon, Nawawi, Nur Izzati Mohamed, Sulaiman, Rabiha, Khalid, Nurul Izzah, Anwar, Farooq, Adzahan, Noranizan Mohd, Azman, Ezzat Mohamad
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container_title International journal of food science & technology
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creator Ijod, Giroon
Nawawi, Nur Izzati Mohamed
Sulaiman, Rabiha
Khalid, Nurul Izzah
Anwar, Farooq
Adzahan, Noranizan Mohd
Azman, Ezzat Mohamad
description Mangosteen pericarp (MP), rich in polyphenols and antioxidants, is often discarded as agro-waste. Its anthocyanins (ACNs), potential natural colourants, are compromised by high polyphenol oxidase (PPO) and peroxidase (POD) activity. This study examined the effects of hot water and steam blanching on PPO and POD inactivation in MP. Blanching for 0, 30, 60, 90, and 120 s at 100 °C. Hot water inactivated 89.57% PPO (t1/2 = ~67 s) and 92.13% POD (t1/2 = ~33.6 s), while steam inactivated 52.81% PPO (t1/2 = ~113.7 s) and 97.07% POD (t1/2 = ~61.8 s). Despite better enzyme inactivation with hot water, it adversely affected ACNs stability. Steam blanching for 90 s, as determined by principal component analysis, preserved the highest ACNs, phenolics, and antioxidant activities. Cyanidin-3-O-sophoroside and cyanidin-3-O-glucoside were identified via liquid chromatography-mass spectrometry and high-performance liquid chromatography, offering insights for preserving ACNs as natural colourants.
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title Inactivation of polyphenol oxidase and peroxidase activity in mangosteen pericarp via blanching: correlation between anthocyanins and enzyme activities
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