Essential oil composition and antioxidant activity of Thymus longicaulis C. Presl subsp. longicaulis var . longicaulis

Sarıkürkçü, Cengiz; Özer, Mehmet Sabih; Eskici, Mustafa; Tepe, Bektaş; Can, Süleyman; Mete, Ebru

doi:10.1016/j.fct.2010.04.009

Cited by 53 publications

(39 citation statements)

References 26 publications

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“…It is a traditional remedy for cold, flu, cough, nephritis and abdominal pain [15][16][17][18]. To the best of our knowledge, there are several reports on the essential oil analysis of different taxa of T. longicaulis, and the results revealed their marked chemical variations depending on genetically determined properties, localities and environmental factors [19][20][21][22][23][24][25][26]. Three reports have been published concerning the antimicrobial activity of T. longicaulis recently.…”

Section: Introductionmentioning

confidence: 99%

Antimicrobial activity of Thymus longicaulis C. Presl essential oil against respiratory pathogens

et al. 2012

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Thymus longicaulis C. Presl is a small aromatic perennial herb used as a traditional remedy for cold, flu and cough. Composition of the essential oil of T. longicaulis from Croatia and its in vitro antimicrobial activity against the most common respiratory pathogens were evaluated. The yield of essential oil obtained by hydrodistillation from aerial plant parts was 1.2%. According to the GC-MS analysis, a total of forty one compounds (99%) were identified. Thymol (46.3%), γ-terpinene (16.2%), thymyl methyl ether (11.4%), and p-cymene (9.4%) were the main components. Antimicrobial activity of the essential oil against six clinically isolated bacterial and yeast strains was determined using standard disc agar diffusion method and microdilution broth assay. The essential oil exhibited antimicrobial activity towards all tested respiratory pathogens. The most sensitive strains were Haemophilus influenzae and Streptococcus pneumoniae(MIC=0.78 mg/mL), while Staphylococcus aureus was the most resistant (MIC>25.00 mg/mL). Our results indicate that T. longicaulis essential oil could be effective against clinically relevant respiratory pathogens which have the ability to develop resistance to antimicrobial drugs.

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Section: Introductionmentioning

confidence: 99%

Antimicrobial activity of Thymus longicaulis C. Presl essential oil against respiratory pathogens

et al. 2012

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“…The linoleic acid free radical formed upon the abstraction of a hydrogen atom from one of its diallylic methylene groups attacks the highly unsaturated β-carotene molecule. As a result, β-carotene is oxidized and breaks down in part, subsequently losing its chromophore and characteristic orange colour, which is monitored spectrophotometrically [24].…”

Section: Introductionmentioning

confidence: 99%

Essential oils composition and antioxidant properties of three Thymus species

Amiri¹,

Yazdi²,

Dehshiri³

et al. 2011

Planta Med

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The essential oils of three wild-growing Thymus species, collected from west of Iran during the flowering stage, were obtained by hydrodistillation and analyzed by gas chromatography (GC) and gas chromatography/mass spectrometry (GC-MS). Under the optimum extraction and analysis conditions, 44, 38, and 38 constituents (mainly monoterpenes compounds) were identified in T. kotschyanus Boiss. and Hohen, T. eriocalyx (Ronniger) Jalas, and T. daenensis subsp lancifolius (Celak) Jalas which represented 89.9%, 99.7%, and 95.8% of the oils, respectively. The main constituents were thymol (16.4-42.6%), carvacrol (7.6-52.3%), and γ-terpinene (3-11.4%). Antioxidant activity was employed by two complementary test systems, namely, 2,2-diphenyl-1-picrylhydrazyl (DPPH) free-radical scavenging and β-carotene/linoleic acid systems. Antioxidant activity of polar subfraction of T. daenensis subsp lancifolius (Celak) Jalas was found to be higher than those of the others in DPPH assay, while nonpolar subfraction of T. eriocalyx (Ronniger) Jalas has most antioxidant activity in β-carotene/linoleic acid test (19.1 ± 0.1 μg/mL and 96.1 ± 0.8% inhibition rate, resp.).

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“…Based on this information it can be said that borage plant has higher chelating activity than the samphire. However, in all studies encountered in the literature it was also reported that the EDTA had better chelating activity than the examined samples [5,7]. Furthermore, Özen [24] had found the chelating ability of the 100 μg/ml of the hydroalcholic extract of the T. orientalis from Giresun as lower than 40%.…”

Section: Antioxidant Activitiesmentioning

confidence: 99%

“…longicaulis var. longicaulis had higher reducing power than the other kinds of extracts and BHA or BHT [7]. Other than that, in many studies the reducing power had been found to be lower than the standards [2,25,26].…”

Section: Antioxidant Activitiesmentioning

confidence: 99%

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Antioxidant activity of Trachystemon orientalis (L.) G. Don (Borage) grown and eaten as food in Ordu, Turkey

Ayvaz

2015

Herba Polonica

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SummaryIntroductıon: Instead of synthetic antioxidants, using of natural products with antioxidant activity is demanded.Objectıve: The aim of this study is to evaluate the antioxidant activity and total phenolic and flavonoid contents of theTrachystemon orientalis(borage) obtained from Ordu.Methods: The water and ethanol extracts of the borage plant were investigated by using severalin vitroantioxidant activity tests such as total antioxidant capacity, O2•−,•OH, DPPH and ABTS radicals scavenging activities, hydrogen peroxide scavenging activity, FRAP, Fe2+chelating and reducing power assays in order to make effective comparisons.Results: Water extract of theT. orientalishad the more phenolic (90 mg GA/g extract) and flavonoid (56.88 mg CT/g extract) contents than ethanol extract. Furthermore, both of the extracts showed strong antioxidant and radical scavenging activities determined by differentin vitromodels. The highest total antioxidant capacity as ascorbic acid equivalents of 244.50 mg/g extract was also calculated for water extract. Generally, a relationship between total phenolic content and antioxidant activity was established. It is also an important finding for an edible food source that the phenolic and flavonoid content and antioxidative activities for water extract was higher than the ethanol extract.Conclusıon:T. orientaliscould be used as a food ingredient instead of synthetic antioxidants and all results will contribute to the recent increase in investigations on using natural products in many areas such as food, pharmacy, alternative medicine and natural therapy.

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Essential oil composition and antioxidant activity of Thymus longicaulis C. Presl subsp. longicaulis var . longicaulis

Cited by 53 publications

References 26 publications

Antimicrobial activity of Thymus longicaulis C. Presl essential oil against respiratory pathogens

Antimicrobial activity of Thymus longicaulis C. Presl essential oil against respiratory pathogens

Essential oils composition and antioxidant properties of three Thymus species

Antioxidant activity of Trachystemon orientalis (L.) G. Don (Borage) grown and eaten as food in Ordu, Turkey

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