@article {1399, title = {Evaluation of Antioxidant Activity of Some Medicinal Plants and their Combination}, journal = {Pharmacognosy Journal}, volume = {13}, year = {2021}, month = {March 2021}, pages = {596-599}, type = {Research Article}, chapter = {596}, abstract = {

Introduction: Oxidative Stress leads to several complications within the human body. It is the reason behind the generation of several diseases. Free radicals if generated in excess amount can damage the body to a great extent. Finding newer and potent medicinal plants that can fight oxidative stress can be useful in combating the harmful effects of free radicals. Methods: In the current study ethanolic extract of Ocimum kilimandscharicum, Thymus serpyllum, Spilanthes acmella and their combination in equal ratio were used for their ability to counter oxidative stress. The plants were collected from the district of Pithoragarh, Uttarakhand and extracted by soxhlet{\textquoteright}s apparataus using absolute ethanol (99.9\%). The extracts were then dried and used for the study. Result: It was seen that highest absorbance was shown by ascorbic acid at the lowest as well as the highest concentration in the reducing power assay. Also, the combination of the extracts showed the highest absorbance among all the extracts at both the lowest and highest concentration. Conclusion: A higher absorbance indicates a better antioxidant potential. The best effect was shown by the combined extract among all the extracts.

}, keywords = {Flavonoids, Oxidative stress, Phenols, Reducing power}, doi = {10.5530/pj.2021.13.75}, author = {Tanuj Joshi and Vijay Juyal} } @article {190, title = {Gas Chromatography - Mass Spectrometry Analysis and In vitro Antioxidant Activity of the Ethanolic Extract of the Leaves of Tabernaemontana divaricata}, journal = {Pharmacognosy Journal}, volume = {8}, year = {2016}, month = {Oct 2016}, pages = {451-458}, type = {Original Article}, chapter = {451}, abstract = {

Objective: To identify phytoconstituents present in an ethanolic extract of the leaves of Tabernaemontana divaricata and to evaluate its in-vitro antioxidant potential. Methods: The extract was subjected to gas chromatography- mass spectrometry analysis to identify phytoconstituents, and screened for hydroxyl, superoxide and 1, 1-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity, reducing power and metal-chelating activity as a measure of potential antioxidant activity. Results: GC-MS analysis of the extract revealed the presence of 96 phytoconstituents, of which 17 are reported to be bioactive and 11 of these to possess antioxidant potential. When tested in-vitro, the extract exhibited the most potent radical-scavenging activity at a maximum concentration of 10 mg/ml, scavenging effects of 64\%, 67\% and 69\% and corresponding half maximal inhibitory concentration (IC50) values of 6.7 mg/ml, 6.8 mg/ml and 6.2 mg/ml on hydroxyl, superoxide and DPPH radicals, respectively. Ascorbic acid used as a standard (10 mg/ml) showed scavenging effects of 73\%, 73\% and 75\% and corresponding IC50 values of 5.3 mg/ml, 5.8 mg/ml and 5.2 mg/ml, respectively, on hydroxyl, superoxide and DPPH radicals. At 10 mg/ml, the extract and an ethylenediaminetetraacetic acid standard exhibited 68\% and 78\%, respectively, chelation of ferrous ions; at the same concentration, the reducing power of the extract and that of a butylated hydroxytoluene standard was found to be 3.855 and 4.308, respectively. Conclusion: These observations strongly suggest that the ethanolic extract of T. divaricata leaves has potent in-vitro antioxidant activity and thereby could act as a possible therapeutic agent for oxidative stressinduced pathological states.

}, keywords = {antioxidant activity, GC-MS analysis, Metal chelating activity., Phytoconstituents, Reducing power, Tabernaemontana divaricata}, doi = {10.5530/pj.2016.5.7}, author = {Muniyandi Anbukkarasi and Philip A Thomas and Mahalingam Sundararajan and Pitchairaj Geraldine} } @article {1528, title = {Protective effect of cissampelos pareira linn. Extract on gentamicin-induced nephrotoxicity and oxidative damage in rats}, journal = {Pharmacognosy Journal}, volume = {6}, year = {2014}, month = {26th May 2014}, pages = {59-67}, type = {Research Article}, abstract = {

Objective: To evaluate the potential nephroprotective and antioxidant activity of hydroalcoholic Cissampelos pareira (C. pareira) whole plant extract using gentamicin-induced rats. Methods: For studying acute toxicity study, single oral dose of 2g/kg hydroalcoholic extract of C. pareira was evaluated in rats by oral gavage. The nephroprotective activity was evaluated using gentamicin-induced model in rats. In-vitro antioxidant activity was evaluated by using DPPH assay and reducing power assay. In-vivo antioxidant activity was evaluated by using glutathione and lipid peroxidation estimations in gentamicin-induced rats. Hydroalcoholic C. pareira whole plant extract was given at a dose of 200 and 400 mg/kg p.o. Results: For acute toxicity testing rats administered with the extract at a dose 2 g/ kg. the result showed no toxicity. Hydroalcoholic C. Pareira whole plant extract (200 and 400 mg/kg p.o) significantly decrease the elevated urinary glucose levels in the urine, decrease the elevated urea and creatinine levels in blood and increase the urinary creatinine levels in gentamicin-induced nephrotoxic rats. The extract had shown significant dose dependent increase in the DPPH and reducing power activity. There were a dose dependent decreasing and increasing of lipid peroxidation, glutathione levels in hydoalcoholic extract treated groups respectively. Conclusion: This study exhibits that hydroalcoholic C. pareira whole plant extract poses nephroprotective activity which may be due to its antioxidant activity.

Key words: Gentamicin, Cissampelos pareira, creatinine, urea, glucose, lipid peroxidation, glutathione, reducing power, DPPH.

}, keywords = {Cissampelos pareira, Creatinine, DPPH, Gentamicin, Glucose, Glutathione, Lipid peroxidation, Reducing power, urea}, author = {D. R Ch Sekhara Reddy and G Siva Kumar and B. M. Vrushabendra Swamy and K. Phani Kumar} }