scholarly journals Chemical composition, antimicrobial and antioxidant properties of the essential oils of Tulbaghia violacea Harv L.F.

2013 ◽  
Vol 7 (18) ◽  
pp. 1787-1793 ◽  
Author(s):  
S Soyingbe O ◽  
O Oyedeji A ◽  
K Basson A ◽  
Singh M ◽  
R Opoku A
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Antioxidant Properties

scholarly journals Comparative Evaluation of Essential Oils from Medicinal-Aromatic Plants of Greece: Chemical Composition, Antioxidant Capacity and Antimicrobial Activity against Bacterial Fish Pathogens

Molecules ◽  
2019 ◽  
Vol 25 (1) ◽  
pp. 148 ◽  
Author(s):  
Thekla I. Anastasiou ◽  
Manolis Mandalakis ◽  
Nikos Krigas ◽  
Thomas Vézignol ◽  
Diamanto Lazari ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Antioxidant Capacity ◽  
Antioxidant Properties ◽  
In Vitro Assays ◽  
Aromatic Plants ◽  
Farmed Fish ◽  
Fish Pathogens ◽  
Antioxidant Agents ◽  
The Impact

The administration of antibiotics in aquaculture has raised concern about the impact of their overuse in marine ecosystems, seafood safety and consumers’ health. This “green consumerism” has forced researchers to find new alternatives against fish pathogens. The present study focused on 12 Mediterranean medicinal-aromatic plants as potential antimicrobials and antioxidant agents that could be used in fish aquaculture. In vitro assays showed that the essential oils (EOs) from all studied plants had anti-bacterial and antioxidant properties, with their efficacy being dependent on their chemical composition. More specifically, EOs rich in carvacrol, p-cymene and γ-terpinene exhibited not only the strongest inhibitory activity against the growth of bacterial pathogens (inhibitory concentration: 26–88 μg mL−1), but also the greatest total antioxidant capacity (ABTS: 2591–5879 μmole mL−1; CUPRAC: 931–2733 μmole mL−1). These compounds were mainly found in the EOs from Greek oregano (Origanum vulgare subsp. hirtum), Spanish oregano (Thymbra capitata) and savoury (Satureja thymbra) collected from cultivations in Greece. The specific EOs stand out as promising candidates for the treatment of bacterial diseases and oxidative stress in farmed fish. Further in vivo experiments are needed to fully understand the effects of EO dietary supplementation on fish farming processes.

scholarly journals Essential oils from Elaeoselinum asclepium: Chemical composition, antimicrobial and antioxidant properties

2016 ◽  
Vol 6 (10) ◽  
pp. 851-857 ◽  
Author(s):  
Moufida Bouchekrit ◽  
Hocine Laouer ◽  
Mohamed Hajji ◽  
Moncef Nasri ◽  
Serkos Artin Haroutounian ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Antioxidant Properties

Chemical composition, antioxidant, and antimicrobial activities of two essential oils from Algerian propolis

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Safia Boulechfar ◽  
Amar Zellagui ◽  
Meltem Asan-Ozusaglam ◽  
Chawki Bensouici ◽  
Ramazan Erenler ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Pathogenic Bacteria ◽  
Antioxidant Properties ◽  
Antimicrobial Activities ◽  
Gas Chromatography Mass Spectrometry ◽  
Diffusion Method ◽  
Reducing Ability ◽  
Antioxidant And Antimicrobial Activity ◽  
Fungistatic Effect

Abstract This study aims to investigate the chemical composition, antioxidant, and antimicrobial activity of two essential oils (EOs) from Algerian propolis. The volatile constituents were analyzed by gas chromatography-mass spectrometry. Fifty components were identified from the oils. The major components were found to be: cedrol (17.0%), β-eudesmol (7.7%), and α-eudesmol (6.7%) in EO of propolis from Oum El Bouaghi (EOPO) whilst α-pinene (56.1%), cis-verbenol (6.0%), and cyclohexene,3-acetoxy-4-(1-hydroxy-1-methylethyl)-1-methyl (4.4%) in EO of propolis from Batna (EOPB). The antioxidant properties of EOPO and EOPB were determined using 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonate) (ABTS•+) and cupric reducing antioxidant capacity (CUPRAC assays), respectively. Both EOs had more cupric ion reducing ability than scavenging ABTS•+ radicals. The antimicrobial potential of the two EOs against eight pathogens was assayed by the agar diffusion method and the mode of action was determined by microdilution assay. The results revealed that EOPB was bactericidal for all tested pathogenic bacteria and fungicidal for Candida albicans ATCC 10231, whereas, EOPO showed bacteriostatic effect against Escherichia coli O157:H7 and Pseudomonas aeruginosa ATCC27853 and fungistatic effect against C. albicans ATCC 10231. Thus, the obtained results suggest the important use of propolis EOs as preservative agents.

Exploiting the chemical composition of essential oils from Psidium cattleianum and Psidium guajava and its antimicrobial and antioxidant properties

2021 ◽  
Vol 86 (10) ◽  
pp. 4637-4649
Author(s):  
Weysser Felipe Cândido Souza ◽  
Fernando Azevedo Lucena ◽  
Ruann Janser Soares Castro ◽  
Cybelle Pereira Oliveira ◽  
Max Rocha Quirino ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Antioxidant Properties ◽  
Psidium Guajava ◽  
Psidium Cattleianum

Chemical composition and antibacterial and antioxidant properties of commercial essential oils

2013 ◽  
Vol 43 ◽  
pp. 587-595 ◽  
Author(s):  
Bárbara Teixeira ◽  
António Marques ◽  
Cristina Ramos ◽  
Nuno R. Neng ◽  
José M.F. Nogueira ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Antioxidant Properties

scholarly journals Chemical composition and antioxidant activity of essential oil of Cymbopogon flexuosus

2020 ◽  
Vol 12 (1) ◽  
pp. 25-29
Author(s):  
Anju Bhatnagar
Keyword(s):  
Antioxidant Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Racemic Mixture ◽  
Oil Composition ◽  
Cymbopogon Flexuosus ◽  
Ic50 Value

Cymbopogon species from the Poaceae family are widely distributed in the Himalayan region of India and commonly used as flavors, fragrances, cosmetics, and pharmaceuticals. It is known to contain compound citral, which give the lemon scent to many of the plants of the cymbopogon genera. The essential oil of  Cymbopogon flexuosus has high polyphenolic content which is responsible for antioxidant properties.  Beside citral is also used for the synthesis of vitamin B and Ionones. The bioactive potential of Lemongrass and constituent are rapidly increasing which is reflected from growing number of reports being published.  The present study was to know the chemical composition and in vitro antioxidant activity of essential oil of C. flexuosus from Uttarakhand. The essential oils of Cymbopogon collected in the region of Uttarakhand were obtained by hydrodistillation of the leaves and analyzed for chemical composition by GC/MS. The antioxidant activity of essential oils at different concentrations was determined against DPPH radical activity and vitamin C as the standard antioxidant compound.  The IC50    value and percentage of DPPH inhibition were recorded.  Twenty-five compounds were identified in essential oil extracted from leaves representing 93.15% of the oil composition. The yield of essential oil of Cymbopogon was 0.6 + 0.1 %and the major compound in the essential oil was citral (a racemic mixture of two isoforms geranial and nearl) followed by heptenone(1.98%) , linalool(1.65%), geraniol (1.47%), ?-caryophyllene (1.14% ) , limonene (0.92%),  nearl acetate (0.82%), citronellal(0.44 %) and citronellol (0.22%). Radical scavenging capacity (Inhibition, %) of the C. flexuosus essential oil was high (78.19+1.11) at the concentration level of 150 ?g/ml and  IC50 value of the essential oil was 43.67?g/ml.  The data of this study encourages to consider the essential oil of C. flexuosus  as a source of bioactive compounds which may add great industrial value to this crop.

scholarly journals Chemical Composition and Antioxidant Properties of Essential Oils from Peppermint, Native Spearmint and Scotch Spearmint

Molecules ◽  
2019 ◽  
Vol 24 (15) ◽  
pp. 2825 ◽  
Author(s):  
Zhaohai Wu ◽  
Bie Tan ◽  
Yanhong Liu ◽  
James Dunn ◽  
Patricia Martorell Guerola ◽  
...  
Keyword(s):  
Lipid Peroxidation ◽  
Antioxidant Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Antioxidant Properties ◽  
Radical Scavenging ◽  
Reducing Power ◽  
C Elegans ◽  
Reducing Power Assay

Natural antioxidants have drawn growing interest for use in animal feed and the food industry. In the current study, essential oils (EOs) obtained from hydrodistillation of three mentha species, including Mentha piperita (peppermint), Mentha spicata (native spearmint) and Mentha gracilis (Scotch spearmint), harvested in the Midwest region in the United States, were analyzed for their chemical composition using gas chromatography-mass spectrometry, and their antioxidant properties were assessed through chemical assays, in vitro cell culture modeling and in Caenorhabditis elegans (C. elegans). The activity of ferric iron reduction and free-radical scavenging capacity were assessed through chemical-based assays, including the reducing power assay, 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging assay, and Trolox equivalent antioxidant capacity assay (TEAC). Subsequently, the capacity of EOs to mitigate lipid peroxidation was analyzed at various doses using fresh liver homogenates from pigs. A porcine jejunum epithelial cell line (IPEC-J2) was employed as in vitro model to study the cellular antioxidant activity of the mint EOs. Finally, the effectiveness of mint EOs to alleviate acute systemic oxidative damage were evaluated in vivo using C. elegans. Data were analyzed by the MIXED procedure of SAS. Contrast statement was performed to assess linear or quadratic effects of mint EOs given at various doses. All three EOs are mostly composed of monoterpenes and their derivatives (76–90%), but differed in the major compounds, which are menthol and menthone (50%) in peppermint EO and carvone (70%) in spearmint EOs. Three mint EOs demonstrated prominent radical scavenging and Fe3+ reducing activity in chemical-based assays. In comparison with native and Scotch spearmint EOs, peppermint EO had the lowest (p < 0.05) half maximal effective concentration (EC50) in DPPH and TEAC assays and higher efficacy in the reducing power assay. All three EOs exhibited equivalent activity in mitigation of chemical-induced lipid peroxidation in liver tissues in a dose-dependent manner (linear, p < 0.001). The maximal cellular antioxidant activity (CAA) was observed at 5 µg/mL for peppermint, and 100 µg/mL for native and Scotch spearmint EOs. The addition of 25 µg/mL of both spearmint EOs increased (p < 0.05) cellular concentrations of glutathione in H2O2-treated IPEC-J2 cells, suggesting enhanced endogenous antioxidant defense. Supplementation of 100 µg/mL of peppermint or Scotch spearmint EO significantly increased (p < 0.05) the survival rate of C. elegans in response to H2O2-induced oxidative stress. The protective effect is comparable to that of supplementation of 10 µg/mL of ascorbic acid. However native spearmint EO failed to reduce the death rate within the same supplementation dose (10–200 μg/mL).

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