Wyniki wyszukiwania - BazTech

1

In Vitro propagation affects the composition of narrow-leaved lavender essential oils

Andrys D., Kulpa D.

Acta Chromatographica

|

2018

|

Vol. 30, no. 4

225--230

EN

The aim of this study was to identify and determine by means of gas chromatography–flame ionization detector (GC–FID) and gas chromatography–mass spectrometry (GC–MS) method the volatile compounds of essential oils obtained from three varieties of narrow-leaved lavender grown in the field and in in vitro cultures. The essential oils were isolated by hydrodistillation in Deryng apparatus. It was found that the analyzed essential oils varied in terms of chemical composition depending on the variety and conditions of growth. Sixty-four to 87 different compounds were identified in the oils. Essential oils of all 3 varieties obtained in in vitro cultures contained large amounts of borneol (13–32%). This compound was also dominant in plants obtained from in vivo conditions in varieties Ellagance Purple (11%) and Blue River (13%), and in the Munstead variety, the dominant compound was linalool (13%). High concentration of epi-α-cadinol (10–20%) was found in essential oils obtained from in vitro cultured plants. Globulol was found in high concentration (10%) in the Munstead variety grown in in vitro conditions. However, significant quantitative and qualitative differences were found with respect to composition of essential oils obtained from plants grown in the field and in vitro conditions. There was a lack of (E)-β-ocimene, 3-octyn-2-one, 1-octen-3-yl acetate, sabina ketone, pinocarvone, trans-carveol, nerol, epi-longipinanol, or humulene epoxide II. In comparison to oils obtained from field-grown plants, the oils isolated from plants grown in in vitro conditions contained the less volatile compounds identified in the final stage of GC–FID and GC–MS analysis, i.e., thymol, carvacrol, γ-gurjunene, trans-calamene, α-calacorene, khusinol, and 8-cedren-13-ol.

2

GC-MS analysis of the essential oil of Ocimum gratissimum L. growing desolately in South India

Joshi R. K.

Acta Chromatographica

|

2017

|

Vol. 29, no. 1

111--119

EN

The hydrodistilled essential oil from flowering aerial parts of Ocimum gratissimum L. (Lamiaceae) growing desolately in South India was examined to determine its composition. The oil was analyzed by gas chromatography equipped with flame ionization detector (GC–FID) and gas chromatography coupled with mass spectrometry (GC– MS). Forty-one constituents were identified, representing 99.4% of the total oil. The main components were identified as eugenol (57.1%), α-bulnesene (15.6%), and β-caryophyllene (14.2%). Phenylpropanoids (57.3%) and sesquiterpene hydrocarbons (31.6%) were the prominent groups of compounds, followed by oxygenated sesquiterpenes (6.5%), oxygenated monoterpenes (3.0%), and monoterpene hydrocarbons (1.0%). The compound α-bulnesene was identified for the first time in this report. The essential oil was found to be eugenol–α-bulnesene–β-caryophyllene chemotypes.

3

Essential oil composition and antioxidant activity of Marrubium vulgare L. growing wild in Eastern Algeria

Abadi A., Hassani A.

International Letters of Chemistry, Physics and Astronomy

|

2013

|

Vol. 9, iss. 1

17-24

EN

In previous work [1], the essential oil of the aerial parts of Marrubium vulgare L. obtained by hydrodistillation was analysed by gas chromatography coupled to mass spectrometry (GC-MS) in order to determine their chemical composition. Fifty (50) components in the oil of M. vulgare were identified. The results demonstrated that the major components of the essential oil were: 4,8,12,16-Tetramethyl heptadecan-4-olid (16.97 %), Germacrene D-4-ol (9.61 %), α- pinéne (9.37 %), Phytol (4.87 %), Dehydro-sabina ketone (4.12 %), Piperitone (3.27 %), δ-Cadinene (3.13 %), 1-Octen-3-ol (2.35 %) and Benzaldehyde (2.31 %). In this study, the antioxidant properties of essential oil were examined. The results showed that this oil can be considered an effective source of antioxidants of natural origin. This is the first report on chemical composition of M. vulgare essential oil cultivated in Algeria and the original study on the antioxidant activity of M. vulgare essential oil. The antioxidant activity was investigated with one method: 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging method.

4

Chemical composition of Marrubium vulgare L. essential oil from Algeria

Abadi A., Hassani A.

International Letters of Chemistry, Physics and Astronomy

|

2013

|

Vol. 8, iss. 3

210-214

EN

The chemical constituants of the essential oil from aerial parts of Marrubium vulgare, collected in Algeria, were analyzed by GC and GC/MS. The oil yield of the dried plant aerial parts, obtained by hydrodistillation, was 0.04 % (w/w). 50 compounds, accounting for 82.46 % of the oil, were identified. The major constituants were: 4,8,12,16-Tetramethyl heptadecan-4-olid (16.97 %), Germacrene D-4-ol (9.61 %),?- pinéne (9.37 %) Phytol (4.87 %), Dehydro-sabina ketone (4.12 %), Piperitone (3.27 %), ? - Cadinene (3.13 %), 1-Octen-3-ol (2.35 %) and Benzaldehyde (2.31 %).

5

Chemical Composition and Antimicrobial Activity of the Essential Oils from Aerial Parts of Two Marrubium sp. (Lamiaceae) GrowingWild in Lebanon

Grassia A., Senatore F., Arnold A., Bruno M., Piozzi F., Rigano D., Forimsano C.

Polish Journal of Chemistry

|

2006

|

Vol. 80, nr 4

623-628

EN

The essential oils of aerial parts of Marrubium globosum Montbr. etAuch. ex Benth. ssp. libanoticum (Boiss) Davis and M. cuneatum Banks et Solander (Lamiaceae) growing wild in Lebanon were obtained by hydrodistillation and were analysed by GC and GC-MS. Altogether 64 compounds, representing 93.4% and 91.4% of the oils,were identified. The main components of both oils were beta-caryophyllene (12.4%-5.2%), hexadecanoic acid (7.4%-6.5%) and spathulenol (5.2%-6.5%). Bicyclogermacrene (5.2%) was present only in the oil of M. cuneatum characterized by high amount of germacrene D (15.6%). Oils showed a moderate antimicrobial activity.

6

Stachyfloroside E: A New Acylated Flavone Glycoside from Stachys parviflora

Ahmad V., Arshad S., Bader S., Iqbal S., Tareen R.

Polish Journal of Chemistry

|

2005

|

Vol. 79 / nr 8

1295-1300

EN

Phytochemical investigations of the whole plant of Stachys parviflora (Lamiaceae) resulted in the isolation of a new acylated flavone glycoside. The structure of the new compound, named stachyfloroside E, was established as 6,8-dihydroxy-2-(4',5'-dihydroxy)-7[-6-O-acetyl-_-Dgalactopyranosyl( 1--2)-beta-D-glucopyranosyl)oxy]-4H-1-benzopyran (1). The structure elucidation of the new compound was based primarily on 1D and 2D NMR analysis, including COSY, HMBC and HMQC correlations.

7

Limbatolide F and G: Two New trans-Clerodane Diterpenoids from Otostegia limbata

Farooq U., Khan A., Ahmad V., Kousar F., Iqbal S.

Polish Journal of Chemistry

|

2005

|

Vol. 79 / nr 11

1757-1762

EN

Two new trans-clerodane diterpenoids pro vi sion ally named as limbatolide F (1) and limbatolide G (2) were isolated from the chloroform extract of Otostegia limbata. Both compounds 1 and 2 have a unique feature of C-4/C-6 five membered a,b-un saturated lactone. The structures of these new compounds as well as their relative configurations were determined by 1D and 2D NMR techniques including COSY, HMQC, HMBC, NOESY and NOE experiments.