OBJECTIVE: To extract, quantify, and evaluate the phenolic content in Opuntia ficus-indica skin for their antioxidant capacity with three different methods (ABTS, DPPH, and lipid oxidation) and to optimize the extraction conditions (time, temperature and ethanol concentration) in a reflux system. METHODS: The extraction process was done using a reflux system. A San Cristobal II experimental design with three variables and three levels was used. The variables evaluated were time of extraction (h), concentration of ethanol (%, v/v) and temperature (°C). The extraction process was optimized using a response surface methodology. RESULTS: It was observed that at higher temperature more phenolic compounds were extracted, but the antioxidant capacity was decreased. The optimum conditions for phenolic compounds extraction and antioxidant capacity mixing the three methods were as follows: 45% of ethanol, 80 °C and 2 hours of extraction. Values obtained in our results are little higher that other previously reported. CONCLUSIONS: It can be concluded the by-products of Opuntia ficus-indica represent a good source of natural antioxidants with possible applications in food, cosmetics or drugs industries.
OBJECTIVE: To extract, quantify, and evaluate the phenolic content in Opuntia ficus-indica skin for their antioxidant capacity with three different methods (ABTS, DPPH, and lipid oxidation) and to optimize the extraction conditions (time, temperature and ethanol concentration) in a reflux system. METHODS: The extraction process was done using a reflux system. A San Cristobal II experimental design with three variables and three levels was used. The variables evaluated were time of extraction (h), concentration of ethanol (%, v/v) and temperature (°C). The extraction process was optimized using a response surface methodology. RESULTS: It was observed that at higher temperature more phenolic compounds were extracted, but the antioxidant capacity was decreased. The optimum conditions for phenolic compounds extraction and antioxidant capacity mixing the three methods were as follows: 45% of ethanol, 80 °C and 2 hours of extraction. Values obtained in our results are little higher that other previously reported. CONCLUSIONS: It can be concluded the by-products of Opuntia ficus-indica represent a good source of natural antioxidants with possible applications in food, cosmetics or drugs industries.
Authors: Jelili A Badmus; Temitope O Adedosu; John O Fatoki; Victor A Adegbite; Oluwatosin A Adaramoye; Oyeronke A Odunola Journal: Acta Pol Pharm Date: 2011 Jan-Feb Impact factor: 0.330
Authors: Silvia Valtueña; Nicoletta Pellegrini; Laura Franzini; Marta A Bianchi; Diego Ardigò; Daniele Del Rio; PierMarco Piatti; Francesca Scazzina; Ivana Zavaroni; Furio Brighenti Journal: Am J Clin Nutr Date: 2008-05 Impact factor: 7.045
Authors: Annalisa Cossu; Anna Maria Posadino; Roberta Giordo; Costanza Emanueli; Anna Maria Sanguinetti; Amalia Piscopo; Marco Poiana; Giampiero Capobianco; Antonio Piga; Gianfranco Pintus Journal: PLoS One Date: 2012-11-08 Impact factor: 3.240