scholarly journals A comparative study on the antioxidant activity of methanolic extracts from different parts of Morus alba L. (Moraceae)

2013 ◽  
Vol 6 (1) ◽  
pp. 24 ◽  
Author(s):  
Muhammad Ali Khan ◽  
Aziz Abdur Rahman ◽  
Shafiqul Islam ◽  
Proma Khandokhar ◽  
Shahnaj Parvin ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Comparative Study ◽  
Morus Alba ◽  
Methanolic Extracts ◽  
Different Parts

scholarly journals Antimicrobial and Antioxidant Potential of Methanolic Extracts from Different Parts of Stevia rebaudiana Bertoni Cultivated in Bulgaria

2021 ◽  
Vol 50 (9) ◽  
pp. 2641-2651
Author(s):  
Toncho Dinev ◽  
Milena Tzanova ◽  
Nikolina Rusenova ◽  
Neli Grozeva ◽  
Mariya Gerdzhikova ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antibacterial Activity ◽  
Radical Scavenging ◽  
Stevia Rebaudiana ◽  
The Other ◽  
Antioxidant Potential ◽  
Diffusion Method ◽  
Stevia Rebaudiana Bertoni ◽  
Methanolic Extracts ◽  
Different Parts

Stevia rebaudiana Bertoni is a plant species which is frequently used not only as a sweetener, but also for its antibacterial and antioxidant properties. Nowadays, there are a large number of studies on the antimicrobial and antioxidant activity of S. rebaudiana leaves, but there are almost no data about the antimicrobial and antioxidant potential of extracts from the other parts of S. rebaudiana. The aim of the present study is to provide data of the antibacterial and antioxidant potential of methanolic extracts from different parts of S. rebaudiana (flowers, leaves, stems, rhizomes, and tubers) cultivated in Bulgaria. Antibacterial activity of the extracts against Staphylococcus aureus, Bacillus cereus and Escherichia coli was evaluated by agar well diffusion method, rutin content - by HPLC method, total phenolic content and radical scavenging potential - by UV-Vis analysis. S. rebaudiana extracts demonstrated antibacterial activity mainly against S. aureus - flower extracts expressed the highest activity, followed by the leaf and stem extracts. Only flower and leaf extracts demonstrated very low antibacterial activity against B. cereus. S. rebaudiana extracts did not show any antibacterial activity against E. coli. Methanolic extracts of this plant are rich in antioxidants. The highest concentrations of rutin and total phenols were found in the rhizomes of the plants, followed by the leaves, tubers, flowers, and stems, which corresponded to the radical scavenging potential of the same plant part. Comparisons between Trolox equivalents and gallic acid equivalents in different parts of S. rebaudiana on one hand, and Trolox equivalents and rutin concentration on the other hand showed a positive dependence and high values of the Pearson correlation - 0.9612 and 0.9707, respectively. The most important part of S. rebaudiana with medicinal significance (the leaves) has both comparatively good antibacterial activity and high antioxidant content, although the flowers and rhizomes expressed higher antibacterial and antioxidant activity, respectively. The experimental results imply that the cultivation area and climatic conditions of Bulgaria are very suitable for cultivation of S. rebaudiana plants with high content of antioxidants.

scholarly journals A comparative study on antioxidant activity of different parts of lotus (Nelumbo nuficera Gaertn) rhizome

2016 ◽  
Vol 37 (1) ◽  
pp. 135-138 ◽  
Author(s):  
Dongmei YANG ◽  
Qian ZHANG ◽  
Guoping REN ◽  
Tiejin YING
Keyword(s):  
Antioxidant Activity ◽  
Comparative Study ◽  
Different Parts

scholarly journals Comparative Study on Antioxidant Activity of Salvia Nemorosa L. From Two Different Locations

2020 ◽  
Vol 28 (28) ◽  
pp. 17-21
Author(s):  
Elham Ghafiyehsanj ◽  
Kamaladdin Dilmaghani ◽  
Nader Chaparzade ◽  
Sara Saadatmand
Keyword(s):  
Antioxidant Activity ◽  
Comparative Study ◽  
Vegetative Stage ◽  
Growth Stages ◽  
Dpph Radical ◽  
Flowering Stage ◽  
Phenological Stages ◽  
Methanolic Extracts ◽  
Aerial Parts ◽  
Different Growth Stages

In order to investigate the antioxidant activity of Salvia nemorosa L. collected from Ahar and Urmia regions in Iran at different growth stages, aerial parts of sage after collecting were dried, and for measurement, the ability of scavenge DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) radical in different concentrations (0.025, 0.05, 0.07, 0.1, 0.2, 0.04 and 0.6) of methanolic extracts were prepared. The result showed that the ability to scavenge DPPH radical and amount of inhibition percent of vegetative stage leaves, flowering stage leaves, and flowers increased with increasing concentrations of methanolic extracts from 0.25 to 0.6 mg/ml. In the region of Urmia, the highest amount of DPPH inhibition there was in vegetative stage leaves, and the lowest amount of DPPH inhibition was seen in flowers. In Ahar regions, unlike the Urmia region, the highest amount of DPPH inhibition there was in flowers, but the lowest of DPPH inhibition was seen in flowering stage leaves. Also, the content of inhibition of DPPH in Ahar and Urmia regions similarly increased between two phenological stages (vegetative stage leaves, flowering stage leaves, and flowers) in 0.4 mg/ml and 0.6 mg/ml concentrations

scholarly journals INVESTIGATION OF ANTIOXIDANT ACTIVITY (IN VITRO) AND GAS CHROMATOGRAPHY-MASS SPECTROMETRY PROFILING OF PORTULACA OLERACEA L. AND PORTULACA GRANDIFLORA HOOK. EXTRACTS

2019 ◽  
pp. 348-352
Author(s):  
KINICHENKO AO
Keyword(s):  
Mass Spectrometry ◽  
Gas Chromatography ◽  
Antioxidant Activity ◽  
Portulaca Oleracea ◽  
Biologically Active ◽  
Gas Chromatography Mass Spectrometry ◽  
Root Extract ◽  
Methanolic Extracts ◽  
Portulaca Grandiflora ◽  
Different Parts

Objective: The aim of this research was to investigate the antioxidant activity (AOA) of the methanolic extracts of different parts of Portulaca oleracea and Portulaca grandiflora. Methods: The plant different parts were extracted with methanol. The methanolic extracts of both species were screened for 2,2-diphenyl-1- picrylhydrazyl radical scavenging abilities and researched by gas chromatography-mass spectrometry (GC-MS) analysis. Results: GC-MS analysis of P. oleracea root extract revealed the presence of 39 biologically active compounds. 32 biologically active compounds were identified in P. grandiflora root extract. Both extracts revealed the AOA. Conclusion: The results of the investigation could be useful for further pharmacological and phytochemical researches to assess the beneficial properties of both these species.

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