Characterization of Microwave Extracted Essential Oil from Taxus cuspidata Stem and Determination of Its Phenolic Content, Antioxidant and Free Radical Scavenging Activities

2016 ◽  
Vol 19 (5) ◽  
pp. 1051-1065
Author(s):  
Vivek K. Bajpai ◽  
Kwang-Hyun Baek
Keyword(s):  
Free Radical ◽  
Essential Oil ◽  
Phenolic Content ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Taxus Cuspidata ◽  
Free Radical Scavenging Activities

scholarly journals Chemical Composition of the Essential Oil of Ligularia hodgsonii and Free Radical Scavenging Activity of the Oil and Crude Extracts

2014 ◽  
Vol 9 (10) ◽  
pp. 1934578X1400901
Author(s):  
Zihao Zhou ◽  
Jun Tang ◽  
Xueping Song
Keyword(s):  
Free Radical ◽  
Chemical Composition ◽  
Essential Oil ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Ethanolic Extract ◽  
Free Radical Scavenging ◽  
Total Oil ◽  
Lower Capacity ◽  
Free Radical Scavenging Activities

The chemical composition of the essential oil from roots and rhizomes of Ligularia hodgsonii was analyzed by gas chromatography (GC) and GC-mass spectrometry (MS). Forty-seven components were identified, representing 77.0% of the total oil. The main constituents were l-(+)-ascorbic acid 2,6-dihexadecanoate (15.7%), selina-6-en-4-ol (8.4%) and 9,10-dimethyl-1,2,3,4,5,6,7,8-octahydroanthracene (6.6%). The free radical scavenging activities of the essential oil, aqueous extract, ethanolic extract, and crude polysaccharides of L. hodgsonii, as well as some of their major components, were investigated using DPPH and ABTS assays. The essential oil displayed a lower capacity to quench free radicals than the extracts; the ethanolic and aqueous extracts showed considerably higher antioxidant potential that deserves further study.

scholarly journals Artemisia dracunculus Essential Oil Chemical composition and antioxidant properties

2019 ◽  
Vol 70 (1) ◽  
pp. 59-62 ◽  
Author(s):  
Ariadna Petronela Fildan ◽  
Ioan Pet ◽  
Daniela Stoin ◽  
Gabriel Bujanca ◽  
Alexandra Teodora Lukinich-Gruia ◽  
...  
Keyword(s):  
Free Radical ◽  
Chemical Composition ◽  
Essential Oil ◽  
Phenolic Content ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Total Phenolic ◽  
Scavenging Activity ◽  
Artemisia Dracunculus

Free radical scavenging activity, total phenolic content and the chemical composition of the essential oil isolated by steam distillation from Artemisia dracunculus L. was investigated. The isolation yield was 0.24% (v/w) based on the fresh plant material (leaves). GC-MS investigation identified 21 components, accounting 99.93% of the total amount. The major components were sabinene (42.38%), isoelemicin (12.91%), methyl eugenol (9.09%), elemicin (7.95%) and beta-ocimene (6.46%). The free radical scavenging activity of the essential oil of Artemisia dracunculus L. was evaluated in vitro by the DPPH assay (IC50 = 0.730 � 0.213 mg/mL), BHA and alpha-tocopherol were used as a positive control. The total phenolic content of the tarragon essential oil was evaluated by the Folin-Ciocalteu method (GAE = 0.451 � 0.001 mg/g sample). In view of these data, we consider that tarragon essential oil could represent a new antioxidants source as a reliable option to reduce the usage of synthetic additives.

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