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1

Essential oil composition of Taraxacum officinale

100%
Bylka W., Matlawska I., Franski R.
Acta Physiologiae Plantarum
|
2010
|
tom 32
|
nr 2
The gas chromatography–mass spectrometry (GC–MS) analysis of essential oil obtained by hydrodistillation from the flower of Taraxacum officinale L. revealed the presence of 25 compounds with 1,3-dimethylbenzene, 1,2-dimethylbenzene, 1-ethyl-3-methylbenzene, heneicosane and tricosane as the main components.
2
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Influence of distillation time on the content and composition of essential oil isolated from wild thyme (Thymus serpyllum L.)

72%
Wesolowska A., Jadczak D., Grzeszczuk M.
Herba Polonica
|
2012
|
tom 58
|
nr 4
The influence of the time of distillation on the content and composition of essential oil isolated from wild thyme (Thymus serpyllum L.) by hydrodistillation was investigated. The GC-MS data showed that the essential oil was rich in carvacrol (30.90–46.16%) and its biogenetic precursors γ-terpinene (5.72–9.09%) and p-cymene (4.51–13.46%). Other constituents identified in significant amounts were β-caryophyllene, carvacrol methyl ether and (-)-β-bisabolene. On the basis of the obtained data it was proved that time of distillation had no effect on essential oil content. Moreover, there was no significant effect of the distillation time on the content of essential oil constituents found in the experiment.
3

The content of essential oil in ten sweet basil [Ocimum basilicum L.] cultivars and its composition

72%
Seidler-Lozykowska K., Krol D.
Herba Polonica
|
2008
|
tom 54
|
nr 3
The experiment was conducted in the Research Institute of Medicinal Plants in Poznań, Poland in 2005–2006 and concerned a collection of ten sweet basil cultivars such as: ‘Minette’, ‘Mittelgrossblättriges Grünes’, Piccolino’, ‘Rubin’, ‘Red Rubin’, ‘Genoveser’, ’Martina’ and two Polish cultivars: ‘Wala’ and ‘Kasia’. Moreover, ‘Lemonette’ cultivar of Ocimum americanum L. was also included in the collection. The content of essential oil in the dried herb was estimated and its composition was analyzed. The content of essential oil in the dried herb without stems ranged from 0.23% (‘Red Rubin’) to 1.67% (‘Kasia’). The main component of the oils that came from nine basil cultivars was linalool, (from 37.07% for ‘Piccolino’ to 76.22% for ‘Minette’). Considerable amounts of 1,8-cineol and eugenol, next β-pinene, α-terpinene and myrcene were also found. The content of 16 identified components in oil represented from 69.34% (‘Piccolino’) to 96.11% (‘Wala’) of the GC profiles. Both Polish cultivars were distinguished by high content of geraniol in essential oil.
4
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Determination of essential oil composition by GC-MS and integral antioxidant capacity using photochemiluminescence assay of two Thymus leaves: Thymus syriacus and Thymus cilicicus from different Syrian locations

58%
Zayzafoon G., Odeh A., Allaf A. W.
Herba Polonica
|
2012
|
tom 58
|
nr 4
The Syrian Thymus cilicicus (Th. cilicicus) Boiss & Bal. and Thymus syriacus (Th. syriacus) Boiss chemical components were identified using GC-MS spectrometry. Sixteen constituents representing an average of 93.85% of the essential oil from Syrian Thymus cilicicus were characterized. The major average components in four collection rounds of Thymus cilicicus around the year were: thymol, carvacrol, γ-terpinene, carvyl acetate, dihydrocarvone and anis aldehyde. Eighteen components representing an average of 93.46% of the essential oil of Thymus syriacus were characterized. The major average components in four collection rounds of Thymus syriacus around the year were: carvacrol, dihydrocarvone, β-caryophyllene, p-cymene, farnesol, limonine, menthol, myrecene, γ-terpinene, terpinene- 4-ol and thymol. The integral antioxidant capacity of aqueous and essential oils extracts of both Thymus species: Th. syriacus and Th. cilicicus have been determined by means of a photochemiluminescence assay (PCL). The highest integral antioxidant capacity has been found for Th. syriacus and Th. cilicicus in Fahel mountain and Salah Aldin locations which have a value of total nmol equivalent per gram of dry material at 374.6 ± 0.94 and 475.80 ± 1.20 nmol TE/g DM, respectively.
5

Evaluation of morphological and developmental variability and essential oil composition of selected basil cultivars

58%
Nurzynska-Wierdak R.
Herba Polonica
|
2007
|
tom 53
|
nr 3
Study dealt with the evaluation of morphological and developmental variability as well as chemical composition of essential oils at dry herb of selected basil cultivars. Great differ­ences of basil plants related to morphological traits, yielding and chemical composition depending on the cultivar and study year were recorded. 'Cinnamon' basil produced the tallest plants with the highest number of inflorescences. The highest yield of fresh and dry herb was achieved from 'Licorice' (18.3 kg 100m2 and 3.8 kg 100m2, respectively). That cultivar was also distinguished by the highest level of essential oils (1.75% DM). Depending on the cultivar, following constituents dominated in essential oil: geranial, neral, E-methyl cinnamate, linalool, and methylchavicol.
6

Analysis of chemical composition of essential oil in the herb of thyme [Thymus vulgaris L.] grown in South-Eastern Poland

51%
Zawislak G.
Herba Polonica
|
2007
|
tom 53
|
nr 3
The experiment was conducted in the years 2004-2005. The aim of the study was to determine the chemical composition of essential oils from garden thyme herb in the first year of cultivation. Essential oil was achieved in distillation with water vapor according to Polish Pharmacopoeia VI. Qualitative and quantitative composition of essential oils was analyzed using gas chromatography combined with mass spectroscopy technique (GC/MS). The analysis revealed the presence of 37 chemicals in essential oil made of thyme, including one unidentified. Thymol, a-terpinene, p-cymene and carvacrol were the main components of essential oil achieved from garden thyme cultivated in south­eastern Poland.
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