scholarly journals Chemical Composition, Free Radical Scavenging and Antimicrobial Activities of Essential Oil of Vahl

2016 ◽  
Vol 07 (1) ◽  
pp. 160-167 ◽  
Author(s):  
Patricia A. Onocha ◽  
Ganiyat K. Oloyede ◽  
Jamiu A. Akintola
Keyword(s):  
Free Radical ◽  
Chemical Composition ◽  
Essential Oil ◽  
Radical Scavenging ◽  
Antimicrobial Activities ◽  
Free Radical Scavenging

scholarly journals Composition and biological assays of the leaf essential oil of Asparagus flagellaris (Kunth) Bak

2021 ◽  
Vol 7 (1) ◽  
Author(s):  
Oluwakayode O. Odeja ◽  
Michael Gabriel Ibok ◽  
Ejike O. Okpala
Keyword(s):  
Free Radical ◽  
Essential Oil ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Salmonella Typhi ◽  
Antimicrobial Activities ◽  
Free Radical Scavenging ◽  
Gas Chromatography Mass Spectrometry ◽  
Klebsiella Pneumonia ◽  
Leaf Essential Oil

Abstract Background Asparagus flagellaris leaves are ethnomedicinally used to treat syphilis, gonorrhea and other sexually transmitted diseases (STDs), with no reports on the volatile constituents. This study was aimed to quantitatively and qualitatively characterise the composition of essential oil, evaluates the free radical scavenging and antimicrobial capacity of the essential oil. Methods The essential oil was isolated by hydrodistillation method using all-glass Clevenger-type apparatus, while the identification and quantification of constituents were performed by gas chromatography-mass spectrometry (GC-MS) technique. The antioxidant activity on 2, 2-diphenyl-1-picrylhydrazyl (DPPH) was evaluated and the oil was also tested against 10 strains of microorganisms consisting of 6 bacteria: Escherichia coli, Salmonella typhi, Klebsiella pneumonia, Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus subtilis and 4 fungi: Candida albicans, Penicillium notatum, Aspergillus niger and Rhizopus spp. using broth dilution and surface plate methods, respectively. Results A pale yellow essential oil with a characteristic scent was obtained, with a yield of 0.80% (w/w). A total of 28 compounds accounting for 97.41% of the total oil contents were identified. The oil was predominated by Thymol and its derivatives, accounting for 57.48%. The most abundance (% area) constituents of the essential oil were 5-Thymyl tiglate (18.49%), Thymyl-2-methyl butyrate (17.34%), Thymol hydroquinone dimethyl ether (10.52%), Thymol methyl ether (9.42%) and 5-Propyl-1, 3-benzodioxole (4.59%). The essential oil showed a significant free radical scavenging activity compared to the standard antioxidant drugs used in this study, with % inhibition varying from 88.06 ± 0.0001 to 93.05 ± 0.0006. The leaf essential oil exhibited antimicrobial activity on all the tested organisms at 500–125 μg/mL, with an 18–10 mm inhibitory zone. Conclusion The leaf essential oil of A. flagellaris contains notable chemical compounds responsible for its antioxidant and antimicrobial 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.

Chemical composition and free radical-scavenging, anticancer and anti-inflammatory activities of the essential oil from Ocimum kilimandscharicum

Phytomedicine ◽  
2014 ◽  
Vol 21 (11) ◽  
pp. 1298-1302 ◽  
Author(s):  
V.T. de Lima ◽  
M.C. Vieira ◽  
C.A.L. Kassuya ◽  
C.A.L. Cardoso ◽  
J.M. Alves ◽  
...  
Keyword(s):  
Free Radical ◽  
Chemical Composition ◽  
Essential Oil ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Anti Inflammatory

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.

scholarly journals Chemical Composition, In Vitro Antimicrobial, Free-Radical-Scavenging and Antioxidant Activities of the Essential Oil of Leucas inflata Benth

Molecules ◽  
2017 ◽  
Vol 22 (3) ◽  
pp. 367 ◽  
Author(s):  
Ramzi Mothana ◽  
Omar Noman ◽  
Ebtesam Al-Sheddi ◽  
Jamal Khaled ◽  
Mansour Al-Said ◽  
...  
Keyword(s):  
Free Radical ◽  
Chemical Composition ◽  
Essential Oil ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Free Radical Scavenging

Chemical Composition of Essential Oil from Fruit of Ficus Altissima

2012 ◽  
Vol 554-556 ◽  
pp. 1125-1128 ◽  
Author(s):  
De La Zhang ◽  
Yu Hong Feng ◽  
Zhen Yi Liang ◽  
Qiang Lin ◽  
Jing Xu
Keyword(s):  
Antioxidant Activity ◽  
Free Radical ◽  
Chemical Composition ◽  
Essential Oil ◽  
Dibutyl Phthalate ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Landscape Plant ◽  
Main Components ◽  
First Time

The chemical composition of hydrodistilled oil from the fruit residue of Ficus altissima was analyzed for the first time by GC/GC–MS. As a result, a total of seventeen compounds were identified, representing all of the oil. Aliphatic hydrocarbons, esters and alkylenes were found to compose three major chemotype accounted for 64.25%, 26.00% and 9.75% of the oil, respectively. The main components was demonstrated to be dibutyl phthalate(18.14%), n-docosane(7.94%), diisooctyl phthalate(7.86%), n-heptadecane(7.70%), n-tricosane(7.68%), phytane(7.19%). Antioxidant activity of the oil was assessed by the free radical scavenging (DPPH). The study offers theoretic basis for pharmaceutical utilization of the landscape plant F. altissima.

scholarly journals The chemical composition, antimicrobial and antioxidant activities of the essential oil of Salvia fruticosa growing wild in Libya

2013 ◽  
Vol 65 (1) ◽  
pp. 321-329 ◽  
Author(s):  
Abdulhamid Giweli ◽  
Ana Dzamic ◽  
Marina Sokovic ◽  
M.S. Ristic ◽  
P. Janackovic ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Antioxidant Activity ◽  
Free Radical ◽  
Chemical Composition ◽  
Essential Oil ◽  
Antioxidant Activities ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Gram Negative ◽  
Salvia Fruticosa

The composition of essential oil isolated from Salvia fruticosa, wild growing in Libya, was analyzed by GC and GC-MS. Forty-five compounds could be identified. The essential oil contained 1,8-cineole (49.34%), camphor (7.53%), ?-pinene (7.38%), myrcene (7.38%), ?-pinene (5.15%), ?-caryophyllene (4.13%) and ?-terpineol (3.25). Antioxidant activity was analyzed using the DPP H free radical scavenging method and low antioxidant activity was found (IC50 = 15.53 mg/ml). The oil was also screened for its antimicrobial activity against eight bacteria (four Gram-negative and four Gram-positive) and eight fungi. The essential oil of S. fruticosa showed minimal inhibitory activity (MIC) at 0.125-1.5 mg/ml and bactericidal (MBC) at 0.5-2.0 mg/ml. In addition, it exhibited fungistatic (MIC) at 0.125-1.0 mg/ml and fungicidal effect (MFC) at 0.125-1.5 mg/ml.

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