Preliminary Phytochemical Screening and In vitro Antioxidant Activity of Ethiopian Indigenous Medicinal Plants, Ocimum lamiifolium Hochst. ex Benth and Ocimum basilicum L.

Antioxidants are the chemical substances which prevent the free radicals damage in the body. Numerous researches are going globally focussed on investigating natural antioxidants of plants origins. The aims of the present study were to evaluate preliminary phytochemical investigation and in vitro antioxidant activities of Ethiopian indigenous medicinal plants, Ocimum lamiifolium Hochst. ex Benth and Ocimum basilicum L. Aqueous, benzene and hexane crude leaves extracts of O. lamiifolium and O. basilicum were subjected to qualitative phytochemical screening using standard procedures. In addition, we investigated the antioxidant potential of crude aqueous leaves extract of O. lamiifolium and O. basilicum using tests involving inhibition of superoxide anions, DPPH, H2O2, NO and ABTS. Preliminary phytochemical investigation for benzene, hexane and aqueous extracts found alkaloids, sterols, carbohydrate and glycosides, tannins and flavonoids. The fraction inhibition of lipid peroxide at the first stage of oxidation illustrated antioxidant activity of O. lamiifolium and O. basilicum as 90% and 88% compared to those of gallic acid (97%) and BHT (84%) respectively. Also, the aqueous leaves extract of O. lamiifolium and O. basilicum exhibited significant DPPH free radical scavenging activity, nitric acid free radical scavenging activity assay, superoxide anion scavenging activity, ABTS scavenging activity and hydrogen peroxide free radical scavenging assay. Our findings provide confirmation that the aqueous leaves extract of O. lamiifolium and O. basilicum are potential source of natural antioxidants, and this warranted its uses in traditional medicine systems.

Download Full-text

Fractionation, Phytochemical Screening and Free Radical Scavenging Capacity of Different Sub-Fractions from Pituranthos scoparius Roots

Journal of Drug Delivery and Therapeutics ◽

10.22270/jddt.v10i3.4100 ◽

2020 ◽

Vol 10 (3) ◽

pp. 133-136

Author(s):

Ahlem Karbab ◽

Kamel Mokhnache ◽

Lekhmici Arrar ◽

Abderahmane Baghiani ◽

Seddik Khennouf ◽

...

Keyword(s):

Free Radical ◽

Radical Scavenging Activity ◽

Radical Scavenging ◽

Health Benefit ◽

Natural Antioxidants ◽

Chloroform Extract ◽

Free Radical Scavenging ◽

Scavenging Activity ◽

Phytochemical Screening ◽

Potential Health

The purpose of this study was to prepare three sub-fractions from Pituranthos scoparius roots (PSR), characterize their phytochemicals contents and to investigate their free radical scavenging activity by 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) and hydroxyl scavenging activities. Tannins, ﬂavonoids, steroids, and other bioactive compounds were found in the different sub-fractions. The Ethyle acetate extract (EAE) and chloroform extract (ChE) exhibited the highest antioxidant activity using ABTS (17.8 ± 0.87 µg/mL and 18.15 ± 0.68 µg/mL), respectively. Whereas, Crude extract (CrE) have been presented strong hydroxyl scavenging activity (14.9 ± 0.8 µg/mL). This study indicates that PSR extracts has potent free radical scavenging, and may prove to be of potential health benefit as well as additional resources for natural antioxidants. Keywords: Medicinal plant; phytochemical screening; sub-fractions, free radical scavenging.

Download Full-text

Phytochemical screening and In-vitro antioxidant activity of Centella asiatica extracts

International Journal of Phytomedicine ◽

10.5138/09750185.2123 ◽

2017 ◽

Vol 9 (4) ◽

pp. 615

Author(s):

Mukesh Kumar Yadav ◽

Santosh Kumar Singh ◽

JS Tripathi ◽

YB Tripathi

Keyword(s):

Hydrogen Peroxide ◽

Antioxidant Activity ◽

Free Radical ◽

Radical Scavenging Activity ◽

Radical Scavenging ◽

Centella Asiatica ◽

Free Radical Scavenging ◽

Scavenging Activity ◽

Phytochemical Screening

Centella asiatica also known as mandukparni or Indian pennywort or jalbrahmi, which has been used as a medicine in the Ayurveda from ancient times and mentioned in many classical texts of Ayurveda. Centella asiatica has long been used to improve memory and cognitive function.The study aimed to identify the phytochemicals present in different solvent extracts of Centella asiatica (i.e. PECA- Petroleum ether extract of C. asiatica, CCA- Chloroform extract of C. asiatica, EACA- Ethyl acetate extract of C. asiatica, ECA- Ethanolic extract of C. asiatica, HACA- Hydro-alcoholic extract of C. asiatica) and evaluate the respective in-vitro antioxidant potentials. The phytochemical screening of extracts was done with standardized procedures and the antioxidant potential of different solvent extracts of Centella asiatica was assessed by its free radical scavenging activity 2, 2-diphenyl -1- picrylhydrazyl (DPPH) as well as hydrogen peroxide scavenging assay respectively for reducing capability.In all different solvent extracts of C. asiatica revealed excellent free radical scavenging activity as revealed by 2-2- diphenyl-1-picryl-hydrazyl (DPPH) assay with EC50 values for ECA=128.752±1.85 μg/ml, HACA=274.884±1.21 μg/ml and hydrogen peroxide assay against the standard (Butylated hydroxytoluene) BHT, with the EC50 values ECA=429.69±0.92 μg/ml HACA=458.08±0.58 μg/ml while rest solvent extracts shown very less antioxidant activity. The present study indicates that the Centella asiatica extracts have good antioxidant activity which can be used in stress and anxiety and also a good source to be used as natural drugs.

Download Full-text