scholarly journals Optimization of Extraction Process of Valeriana officinalis L. Root Essential Oil and Study on Its Anti-Free Radical Activity

2020 ◽  
Vol 526 ◽  
pp. 012067
Author(s):  
Tianlin Miao ◽  
Hongjuan Zheng ◽  
Xue Wang ◽  
Ying Lan ◽  
Yuehua Zhang ◽  
...  
Keyword(s):  
Free Radical ◽  
Essential Oil ◽  
Extraction Process ◽  
Valeriana Officinalis ◽  
Free Radical Activity ◽  
Root Essential Oil

scholarly journals Free Radical Scavenging Activity of Essential Oil of Eugenia caryophylata from Amboina Island and Derivatives of Eugenol

2019 ◽  
Vol 17 (1) ◽  
pp. 422-428 ◽  
Author(s):  
Hanoch Julianus Sohilait ◽  
Healthy Kainama
Keyword(s):  
Free Radical ◽  
Essential Oil ◽  
Biological Activities ◽  
Radical Scavenging Activity ◽  
Radical Scavenging ◽  
Free Radical Scavenging ◽  
Chemical Compositions ◽  
Free Radical Activity ◽  
Derivatives Of

AbstractEssential oil from Eugenia caryophylata was normally used to heal many different deseaces. Various chemical compositions of essential oil distilled and steamed of Moluccas Eugenia caryophylata has been investigated by many different researchers. Even though an intensive research has been carried out of the local chemotypes, a very detail study has not been fully investigated to find out the complete chemical compounds from the plant essential oil and its content associated with their biological activities. In present paper, we assess the free radical scavenging of E. caryophylata collected from Moluccas islands, Indonesia. Essential oil was extracted from leaves, buds, and stems of plant by steam distillation and analyzed using GC-FID and GC-MS. The result showed that free radical activity of essential oil, main constituent and its derivatives were analized using in vitro method. Essential oil activity from stem obtained as (0.82±0.15 μg/mL) was higher than that from bud and leaf possessing both 1,1-diphenyl-2-picrylhydrazyl (DPPH) and (2,2’-azino-bis-3-ethylbenzthizoline-6-sulphonic acid (ABTS) radical scavenging assays by sinergism of eugenol, eugenyl acetate, β-caryophylene and humulene. The activity of isoeugenol (2) (3.59±0.54 μM) and (5.0±0.53 µM) scavenging DPPH and ABTS, respectively, as derivatives eugenol was higher than (3), (4) and (5). Although (6) was active originally, it was inactive after conversion of the ester. While the change of the double bond of location to conjungation structure caused more activity scavenging radicals than the starting molecule.

Free radical activity and hemostatic factors in NIDDM patients with and without microalbuminuria

Diabetes ◽  
1992 ◽  
Vol 41 (8) ◽  
pp. 909-913 ◽  
Author(s):  
A. Collier ◽  
A. Rumley ◽  
A. G. Rumley ◽  
J. R. Paterson ◽  
J. P. Leach ◽  
...  
Keyword(s):  
Free Radical ◽  
Hemostatic Factors ◽  
Free Radical Activity ◽  
Niddm Patients

Octadeca-9,11 Dienoic Acid - a Measurement of free Radical Activity or a Marker of Infection in the Lung?

1991 ◽  
Vol 81 (s25) ◽  
pp. 17P-17P ◽  
Author(s):  
CIA Jack ◽  
MJ Jackson ◽  
E Ridgeway ◽  
CRK Hind
Keyword(s):  
Free Radical ◽  
Dienoic Acid ◽  
Free Radical Activity

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.

An Investigation of the Relationship between Free Radical Activity and Vitamin C Metabolism in Elderly Diabetic Subjects with Retinopathy

Gerontology ◽  
1992 ◽  
Vol 38 (5) ◽  
pp. 268-274 ◽  
Author(s):  
A.J. Sinclair ◽  
A.J. Girling ◽  
L. Gray ◽  
J. Lunec ◽  
A.H. Barnett
Keyword(s):  
Free Radical ◽  
Vitamin C ◽  
C Metabolism ◽  
The Relationship ◽  
Free Radical Activity

Free-radical activity after primary coronary angioplasty in acute myocardial infarction

1994 ◽  
Vol 127 (6) ◽  
pp. 1443-1449 ◽  
Author(s):  
Ever D. Grech ◽  
Christopher M. Bellamy ◽  
Malcolm J. Jackson ◽  
Ronald A. Muirhead ◽  
E.Brian Faragher ◽  
...  
Keyword(s):  
Myocardial Infarction ◽  
Acute Myocardial Infarction ◽  
Free Radical ◽  
Coronary Angioplasty ◽  
Primary Coronary Angioplasty ◽  
Free Radical Activity

scholarly journals Composition of essential oil and allelopathic activity of aromatic water of Aster lanceolatus Willd: (Asteraceae)

2009 ◽  
Vol 45 (3) ◽  
pp. 469-474 ◽  
Author(s):  
Josiane de Fátima Gaspari Dias ◽  
Obdúlio Gomes Miguel ◽  
Marilis Dallarmi Miguel
Keyword(s):  
Essential Oil ◽  
Lactuca Sativa ◽  
Extraction Process ◽  
Caryophyllene Oxide ◽  
Allelopathic Activity ◽  
Germination And Growth

The essential oil obtained from flowers of Aster lanceolatus was submitted the CG-MS and presented as result thirteen substances with largest concentration; among them, the caryophyllene oxide with the larger one. The aromatic water obtained during the extraction process of this essential oil was forwarded to allelopathic test, and demonstrated to be capable to inhibit the germination and growth of Lactuca sativa.

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