THE IMPACT OF CHESTNUT VARIETY ON RECOVERY OF POLYPHENOLS FROM PEELS PRETREATED BY OHMIC HEATING OPTIMIZED BY RESPONSE SURFACE METHODOLOGY

Autor:	Nihal Turkmen Erol
Rok vydání:	2022
Předmět:	Mechanical Engineering General Chemical Engineering General Chemistry
Zdroj:	Latin American Applied Research - An international journal. 52:329-336
ISSN:	1851-8796 0327-0793
Popis:	The purpose of this study was to optimize ohmic heating (OH) conditions using response surface methodology (RSM) for maximum recovery of polyphenols from industrial chestnut peel waste. Box-Behnken design (BBD) was applied to investigate the effects of three independent variables, namely electric field (V/cm), heating time (sec) and salt concentration (%). From RSM, optimum pretreatment conditions were obtained as 20 V/cm, 100 sec and salt concentration of 0.32%. Three chestnut peels were pretreated by these optimal conditions and their polyphenols were extracted using different solvents. Polyphenol contents and antioxidant capacities of peel extracts were dependent on the variety and extraction solvents used. HPLC analyses showed that ellagic acid was the most abundant phenolic compound in all varieties. OH pretreatment had a positive effect on extraction. Additionally, alcoholic extraction had a better recovery effect compared to water. The peel waste of Kiraz variety was found to be a good source for polyphenols.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::bffba9772dfc3f77ff8c5bf1128a11e2 https://doi.org/10.52292/j.laar.2022.870 Zobrazit plný text záznamu