ISSN 2146-8389
 

Review Article 


Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania

Okumu Ochanga, Mhuji Kilonzo.

Abstract
Objectives: The purpose of this study was to evaluate antioxidant activity of Rhus vulgaris, Sphaeranthus bullatus, Osyris lanceolata, Ocimum gratissimum, Cymbopogon citratus, Acacia nilotica, and Tylosema fassoglensis plants that have been used as herbal teas in Tanzania for treatment of various ailments including bacterial and fungal infections.Methods: Antioxidant activity of the aqueous (AQ) and ethyl acetate (ETA) plant extracts was assessed based on radical scavenging activity of the stable 1,1-diphenyl-2-picryl-hydrazyl (DPPH) on January 2017. Briefly, DPPH (0.2 mm) was obtained by dissolving 3.94 mg of DPPH in 50 ml of pure methanol. The stock solutions of the extracts were prepared in methanol. Serial dilution using 96 well plates was employed to determine radical scavenging activities of different concentrations.Results: All plants demonstrated free radical scavenging activity ranging from 5.36% to 87.75% in different concentrations with the highest activity of 87.75% observed in S. bullatus aqueous extracts in its 500 mg/ml at 60 minutes and the lowest scaveng-ing activity of 5.36% demonstrated by T. fassoglensis leaves ethyl acetate extracts in its 3.906 mg/ml. Scavenging activity was observed to change with polarity and time of reac-tion. Eighty five percent of AQ extracts exhibited the scavenging activity ranging from 80% to 87% at the concentration of 500 mg/ml compared to 39.3% that exhibited by ETA extracts at the same concentration. Total phenolic contents ranged from 57.7 0.8 to 98.02 1.1 mg GAE/g dry weight.Conclusion: The use of herbal tea from S.bullatus, O. lanceolata, T. fassoglensis, A. nilotica, R. vulgaris, C. citratus, and O. gratissimum has potential antioxidant benefits to human health, so it should be used to prepare herbal tea for management of diseases.

Key words: Antioxidant; Free radicals: Scavenging: Sphaeranthus


 
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Pubmed Style

Okumu Ochanga, Mhuji Kilonzo. Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania. Oxid Antioxid Med Sci. 2018; 7(1): 1-8. doi:10.5455/oams.20180207075358


Web Style

Okumu Ochanga, Mhuji Kilonzo. Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania. http://www.ejmoams.com/?mno=290489 [Access: November 16, 2018]. doi:10.5455/oams.20180207075358


AMA (American Medical Association) Style

Okumu Ochanga, Mhuji Kilonzo. Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania. Oxid Antioxid Med Sci. 2018; 7(1): 1-8. doi:10.5455/oams.20180207075358



Vancouver/ICMJE Style

Okumu Ochanga, Mhuji Kilonzo. Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania. Oxid Antioxid Med Sci. (2018), [cited November 16, 2018]; 7(1): 1-8. doi:10.5455/oams.20180207075358



Harvard Style

Okumu Ochanga, Mhuji Kilonzo (2018) Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania. Oxid Antioxid Med Sci, 7 (1), 1-8. doi:10.5455/oams.20180207075358



Turabian Style

Okumu Ochanga, Mhuji Kilonzo. 2018. Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania. Oxidants and Antioxidants in Medical Science, 7 (1), 1-8. doi:10.5455/oams.20180207075358



Chicago Style

Okumu Ochanga, Mhuji Kilonzo. "Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania." Oxidants and Antioxidants in Medical Science 7 (2018), 1-8. doi:10.5455/oams.20180207075358



MLA (The Modern Language Association) Style

Okumu Ochanga, Mhuji Kilonzo. "Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania." Oxidants and Antioxidants in Medical Science 7.1 (2018), 1-8. Print. doi:10.5455/oams.20180207075358



APA (American Psychological Association) Style

Okumu Ochanga, Mhuji Kilonzo (2018) Antioxidant properties of aqueous and ethyl acetate extracts of some plants used as herbal tea in Tanzania. Oxidants and Antioxidants in Medical Science, 7 (1), 1-8. doi:10.5455/oams.20180207075358





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