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Water-soluble polysaccharides from Opuntia stricta Haw. fruit peels: Recovery, identification and evaluation of their antioxidant activities

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Water-soluble polysaccharides from Opuntia stricta Haw. fruit peels: Recovery, identification and evaluation of their antioxidant activities

dc.contributor.author	Koubaa, Mohamed
dc.contributor.author	Ktata, Ameni
dc.contributor.author	Barba Orellana, Francisco José
dc.contributor.author	Grimi, Nabil
dc.contributor.author	Mhemdi, Houcine
dc.contributor.author	Bouaziz, Fatma
dc.contributor.author	Driss, Dorra
dc.contributor.author	Chaabouni, Semia Ellouz
dc.date.accessioned	2017-01-26T15:07:11Z
dc.date.available	2017-01-26T15:07:11Z
dc.date.issued	2015
dc.identifier.citation	Koubaa, Mohamed Ktata, Ameni Barba Orellana, Francisco José Grimi, Nabil Mhemdi, Houcine Bouaziz, Fatma Driss, Dorra Chaabouni, Semia Ellouz 2017 Water-soluble polysaccharides from Opuntia stricta Haw. fruit peels: Recovery, identification and evaluation of their antioxidant activities International Agrophysics 29 3 299 306
dc.identifier.uri	http://hdl.handle.net/10550/56907
dc.description.abstract	Opuntia stricta Haw. is considered as one of the most common cactus plant growing in Tunisia. Extracting valuable compounds from its fruit peel, considered as by-product, is drawing more and more attention, making it on the verge of commercialization. Water-soluble polysaccharides were extracted from Opuntia stricta Haw. peels, and their chemical composition assessed using thin layer chromatography. The antioxidant activities of the extracted polysaccharides were assessed using 2,2-diphenyl-1-picrylhydrazyl free radical scavenging activity, total antioxidant activity and reducing power capacity. The extraction yield of water-soluble polysaccharides was 7.53±0.86%. The chemical composition revealed the presence of rhamnose, arabinose, glucose, mannose, galactose and galacturonic acid. The infra-red spectroscopic analysis showed a similar structure to that of Opuntia ficus-indica polysaccharide peels. Additionally, the extracted polysaccharides exhibited high antioxidant activities. In fact, the free radical scavenging activity (half inhibition concentration = 6.5 mg ml-1 with 94.9% inhibition at 50 mg ml-1), the total antioxidant activity (100 μg ascorbic acid equivalent at 50 mg polysaccharides) and the reducing power capacity (absorbance 700 nm = 0.7 at 50 mg ml-1), appeared to be interesting compared to natural and synthetic antioxidants. Therefore, water-soluble polysaccharides from Opuntia stricta Haw. fruit peels could be a natural alternative to replace synthetic antioxidants.
dc.language.iso	eng
dc.relation.ispartof	International Agrophysics, 2017, vol. 29, num. 3, p. 299-306
dc.title	Water-soluble polysaccharides from Opuntia stricta Haw. fruit peels: Recovery, identification and evaluation of their antioxidant activities
dc.type	journal article	es_ES
dc.date.updated	2017-01-26T15:07:12Z
dc.identifier.doi	10.1515/intag-2015-0035
dc.identifier.idgrec	115530
dc.rights.accessRights	open access	es_ES