@article{
 title = {In vitro, antioxidant activities of aqueous and methanol roselle (Hibiscus sabdariffa) calyces extracts from two localities in Cameroon.},
 type = {article},
 year = {2020},
 pages = {292-297},
 volume = {04},
 id = {86421a02-5a35-3d9a-b1f3-d45da735f59e},
 created = {2020-09-23T22:37:21.416Z},
 file_attached = {false},
 profile_id = {0a55afa8-a36a-39f8-a1c7-6d48ed66c035},
 last_modified = {2020-09-23T22:37:21.416Z},
 read = {false},
 starred = {false},
 authored = {true},
 confirmed = {false},
 hidden = {false},
 private_publication = {false},
 abstract = {Background: Fighting against malnutrition and diseases such as oxidative stress diseases via a food-based approach could be achieved through identification, valorization, and promotion of local foods rich in macro- and micronutrients and phytochemical components. Aim: This study aimed to investigate the effect of agro-ecological conditions on the antioxidant capacity of the Hibiscus sabdariffa aqueous and methanol calyces extracts. Material and methods: The total phenolic content, the free radical DPPH• (1,1-diphenyl-2-picrylhydrazyl), and ferric reducing antioxidant power (FRAP) activities were evaluated in aqueous and methanol Hibiscus sabdariffa calyces extract samples from two localities (Dschang [western highland zone] and Ngaoundéré [high Guinean savanna zone]) in Cameroon. Results: The results obtained showed that these extracts contain an important amount of total phenolic compounds with no significant difference (P>0.05) between aqueous and methanol extracts and also between the origins of calyces. The extracts showed their ability to reduce Fe3+ to Fe2+ as well as their ability to reduce the free radical, DPPH•. Concerning the FRAP results, at the concentration of 12.5µg/mL, the absorbance of AEN (Aqueous Extract from Ngaoundéré locality) recorded the value (0.33±0.05) meanwhile at a far higher concentration of 200 µg/mL, the absorbance of MEN (Methanol Extract from Ngaoundéré locality) was the highest (1.39±0.06). The CI50 of methanol extracts was significantly low (P<0.05) compared to that of aqueous extracts. The value ranges were 11.31±0.15, 14.69±0.84, 18.07±0.63, 20.50±0.54, and 21.50±0.54 µg/mL for ascorbic acid, MEN (Methanol Extract from Ngaoundéré locality), MED (Methanol Extract from Dschang locality), AEN (Aqueous Extract from Ngaoundéré locality), and AED (Aqueous Extract from Dschang locality) respectively. Conclusion: These findings show that the antioxidant activity of methanol extract is higher than that of aqueous extract. Hibiscus calyces from the two localities could be used as a natural antioxidant in the treatment of oxidative stress diseases.
Keywords: Roselle calyces, aqueous and methanol extracts, antioxidant capacity.},
 bibtype = {article},
 author = {Maffo Tazoho G, Etengeneng Agbor E, Gouado I, undefined},
 doi = {https://doi.org/10.5281/zenodo.4039794},
 journal = {The North African Journal of Food and Nutrition Research},
 number = {08}
}

{"_id":"HBJhwserxMMQ4SzQv","bibbaseid":"maffotazohog-invitroantioxidantactivitiesofaqueousandmethanolrosellehibiscussabdariffacalycesextractsfromtwolocalitiesincameroon-2020","authorIDs":[],"author_short":["Maffo Tazoho G, Etengeneng Agbor E, Gouado I"],"bibdata":{"title":"In vitro, antioxidant activities of aqueous and methanol roselle (Hibiscus sabdariffa) calyces extracts from two localities in Cameroon.","type":"article","year":"2020","pages":"292-297","volume":"04","id":"86421a02-5a35-3d9a-b1f3-d45da735f59e","created":"2020-09-23T22:37:21.416Z","file_attached":false,"profile_id":"0a55afa8-a36a-39f8-a1c7-6d48ed66c035","last_modified":"2020-09-23T22:37:21.416Z","read":false,"starred":false,"authored":"true","confirmed":false,"hidden":false,"private_publication":false,"abstract":"Background: Fighting against malnutrition and diseases such as oxidative stress diseases via a food-based approach could be achieved through identification, valorization, and promotion of local foods rich in macro- and micronutrients and phytochemical components. Aim: This study aimed to investigate the effect of agro-ecological conditions on the antioxidant capacity of the Hibiscus sabdariffa aqueous and methanol calyces extracts. Material and methods: The total phenolic content, the free radical DPPH• (1,1-diphenyl-2-picrylhydrazyl), and ferric reducing antioxidant power (FRAP) activities were evaluated in aqueous and methanol Hibiscus sabdariffa calyces extract samples from two localities (Dschang [western highland zone] and Ngaoundéré [high Guinean savanna zone]) in Cameroon. Results: The results obtained showed that these extracts contain an important amount of total phenolic compounds with no significant difference (P>0.05) between aqueous and methanol extracts and also between the origins of calyces. The extracts showed their ability to reduce Fe3+ to Fe2+ as well as their ability to reduce the free radical, DPPH•. Concerning the FRAP results, at the concentration of 12.5µg/mL, the absorbance of AEN (Aqueous Extract from Ngaoundéré locality) recorded the value (0.33±0.05) meanwhile at a far higher concentration of 200 µg/mL, the absorbance of MEN (Methanol Extract from Ngaoundéré locality) was the highest (1.39±0.06). The CI50 of methanol extracts was significantly low (P<0.05) compared to that of aqueous extracts. The value ranges were 11.31±0.15, 14.69±0.84, 18.07±0.63, 20.50±0.54, and 21.50±0.54 µg/mL for ascorbic acid, MEN (Methanol Extract from Ngaoundéré locality), MED (Methanol Extract from Dschang locality), AEN (Aqueous Extract from Ngaoundéré locality), and AED (Aqueous Extract from Dschang locality) respectively. Conclusion: These findings show that the antioxidant activity of methanol extract is higher than that of aqueous extract. Hibiscus calyces from the two localities could be used as a natural antioxidant in the treatment of oxidative stress diseases.\nKeywords: Roselle calyces, aqueous and methanol extracts, antioxidant capacity.","bibtype":"article","author":"Maffo Tazoho G, Etengeneng Agbor E, Gouado I, undefined","doi":"https://doi.org/10.5281/zenodo.4039794","journal":"The North African Journal of Food and Nutrition Research","number":"08","bibtex":"@article{\n title = {In vitro, antioxidant activities of aqueous and methanol roselle (Hibiscus sabdariffa) calyces extracts from two localities in Cameroon.},\n type = {article},\n year = {2020},\n pages = {292-297},\n volume = {04},\n id = {86421a02-5a35-3d9a-b1f3-d45da735f59e},\n created = {2020-09-23T22:37:21.416Z},\n file_attached = {false},\n profile_id = {0a55afa8-a36a-39f8-a1c7-6d48ed66c035},\n last_modified = {2020-09-23T22:37:21.416Z},\n read = {false},\n starred = {false},\n authored = {true},\n confirmed = {false},\n hidden = {false},\n private_publication = {false},\n abstract = {Background: Fighting against malnutrition and diseases such as oxidative stress diseases via a food-based approach could be achieved through identification, valorization, and promotion of local foods rich in macro- and micronutrients and phytochemical components. Aim: This study aimed to investigate the effect of agro-ecological conditions on the antioxidant capacity of the Hibiscus sabdariffa aqueous and methanol calyces extracts. Material and methods: The total phenolic content, the free radical DPPH• (1,1-diphenyl-2-picrylhydrazyl), and ferric reducing antioxidant power (FRAP) activities were evaluated in aqueous and methanol Hibiscus sabdariffa calyces extract samples from two localities (Dschang [western highland zone] and Ngaoundéré [high Guinean savanna zone]) in Cameroon. Results: The results obtained showed that these extracts contain an important amount of total phenolic compounds with no significant difference (P>0.05) between aqueous and methanol extracts and also between the origins of calyces. The extracts showed their ability to reduce Fe3+ to Fe2+ as well as their ability to reduce the free radical, DPPH•. Concerning the FRAP results, at the concentration of 12.5µg/mL, the absorbance of AEN (Aqueous Extract from Ngaoundéré locality) recorded the value (0.33±0.05) meanwhile at a far higher concentration of 200 µg/mL, the absorbance of MEN (Methanol Extract from Ngaoundéré locality) was the highest (1.39±0.06). The CI50 of methanol extracts was significantly low (P<0.05) compared to that of aqueous extracts. The value ranges were 11.31±0.15, 14.69±0.84, 18.07±0.63, 20.50±0.54, and 21.50±0.54 µg/mL for ascorbic acid, MEN (Methanol Extract from Ngaoundéré locality), MED (Methanol Extract from Dschang locality), AEN (Aqueous Extract from Ngaoundéré locality), and AED (Aqueous Extract from Dschang locality) respectively. Conclusion: These findings show that the antioxidant activity of methanol extract is higher than that of aqueous extract. Hibiscus calyces from the two localities could be used as a natural antioxidant in the treatment of oxidative stress diseases.\nKeywords: Roselle calyces, aqueous and methanol extracts, antioxidant capacity.},\n bibtype = {article},\n author = {Maffo Tazoho G, Etengeneng Agbor E, Gouado I, undefined},\n doi = {https://doi.org/10.5281/zenodo.4039794},\n journal = {The North African Journal of Food and Nutrition Research},\n number = {08}\n}","author_short":["Maffo Tazoho G, Etengeneng Agbor E, Gouado I"],"biburl":"https://bibbase.org/service/mendeley/0a55afa8-a36a-39f8-a1c7-6d48ed66c035","bibbaseid":"maffotazohog-invitroantioxidantactivitiesofaqueousandmethanolrosellehibiscussabdariffacalycesextractsfromtwolocalitiesincameroon-2020","role":"author","urls":{},"metadata":{"authorlinks":{}},"downloads":0},"bibtype":"article","creationDate":"2020-09-24T08:34:51.301Z","downloads":0,"keywords":[],"search_terms":["vitro","antioxidant","activities","aqueous","methanol","roselle","hibiscus","sabdariffa","calyces","extracts","two","localities","cameroon","maffo tazoho g"],"title":"In vitro, antioxidant activities of aqueous and methanol roselle (Hibiscus sabdariffa) calyces extracts from two localities in Cameroon.","year":2020,"biburl":"https://bibbase.org/service/mendeley/0a55afa8-a36a-39f8-a1c7-6d48ed66c035","dataSources":["fBNZuApf5WD23sagh","ya2CyA73rpZseyrZ8","2252seNhipfTmjEBQ"]}