scholarly journals (R)-(–)-Linalyl Acetate and (S)-(–)-Germacrene D from the Leaves of Mexican Bursera linanoe

2010 ◽  
Vol 5 (3) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Koji Noge ◽  
Nobuhiro Shimizu ◽  
Judith X. Becerra
Keyword(s):  
Solvent Extraction ◽  
Essential Oils ◽  
Decomposition Product ◽  
Steam Distillation ◽  
Common Method ◽  
Volatile Components ◽  
Linalyl Acetate ◽  
Germacrene D

The leaf volatile components of Mexican Bursera linanoe were identified as ( R)-(–)-linalyl acetate (57.6%; 95.5% ee) and ( S)-(–)-germacrene D (39.3%; 100% ee) by solvent extraction and GC–MS and chiral GC analyses. Linalool was previously reported as the major component from the leaves of B. linanoe. However, we believe that this is a decomposition product of linalyl acetate during steam distillation, a common method for extraction of essential oils. The chemically unique blend in the leaves of B. linanoe may act as a chemical barrier against its potential herbivores, Blepharida beetles that have a tendency for attacking chemically similar plants as hosts.

Comparative Study of Volatile Components of Essential Oil from Conyza canadensis between Hydrodistillation and Steam Distillation

2010 ◽  
Vol 113-116 ◽  
pp. 1644-1647 ◽  
Author(s):  
Zhi Ming Liu ◽  
Hai Ying Wang ◽  
Shan Shan Liu ◽  
Nai Xiang Jiang
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Steam Distillation ◽  
Biomimetic Synthesis ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Components ◽  
Conyza Canadensis ◽  
Aerial Parts ◽  
Germacrene D ◽  
The Common

The volatile components of essential oils of fresh aerial parts from horseweed (Conyza canadensis) collected in October with hydrodistillation and steam distillation, respectively, were analyzed by gas chromatography-mass spectrometry. The results showed that limonene, β-pinene, trans-α-bergamotene, cis-β-ocimene, β-myrcene, germacrene D, 1,3,8-p-menthatriene, caryophyllene, (E)-β-farnesene, (Z)-β-farnesene, α-curcumene, caryophyllene oxide were the common volatile components in the essential oils between hydrodistillation and steam distillation. High limonene content (68.87%) was in the essential oil with hydrodistillation. Limonene or other terpenoids has the potential to develop as the biomimetic synthesis template for environmentally-friendly herbicide.

Chemical composition, antibacterial and antioxidant activities of Juniperus oxycedrus essential oils from North Western Algeria

2018 ◽  
Vol 7 (2) ◽  
pp. 74-83
Author(s):  
Cherifa Zahaf ◽  
Djilali Achour ◽  
Meriem Mokhtar ◽  
Moussa Brada
Keyword(s):  
Essential Oils ◽  
Steam Distillation ◽  
Antioxidant Activities ◽  
Inhibition Zone ◽  
Inhibitory Effect ◽  
Juniperus Oxycedrus ◽  
Germacrene D ◽  
Western Algeria ◽  
North Western ◽  
Β Carotene

The aim of the current study was to identify the essential oils of Juniperus oxycedrus from North Western Algeria (Mostaganem) by gas chromatography coupled to mass spectrometer (GC-MS), and to evaluate their antibac-terial and antioxidant activities. Extraction was carried out by two processes, hydrodistillation (HD) and steam distillation (SD). Analysis by GC-MS led to the identification of 38 components using both methods. HD was found to be the best process for the extraction of Juniperus essential oil, and the ma-jor identified compounds were: germacrene-D (38.28%), followed by α.-pinene (17.66%), and δ-cadinene (5.91%). In the antibacterial test, SD oil had a higher inhibitory effect. The strain Staphylococcus aureus was the most sensitive with an inhibition zone of 15.25 mm and a minimum inhibitory concentration (MIC) of 0.25 mg/mL. The antioxidant activity of J. oxycedrus es-sential oils obtained by HD was more important than SD (IC50= 19.52 mg/mL and IC50= 38.62 mg/mL) with DPPH and β-carotene bleaching tests respec-tively. Essential oils of J. oxycedrus could therefore represent good candidates to be used as antioxidant and antibacterial agents.

scholarly journals The GC/MS Analysis of Volatile Components Extracted by Different Methods fromExocarpium Citri Grandis

2013 ◽  
Vol 2013 ◽  
pp. 1-8 ◽  
Author(s):  
Zhisheng Xie ◽  
Qundi Liu ◽  
Zhikun Liang ◽  
Mingqian Zhao ◽  
Xiaoxue Yu ◽  
...  
Keyword(s):  
Solid Phase Microextraction ◽  
Large Scale ◽  
Steam Distillation ◽  
Extraction Efficiency ◽  
Solid Phase ◽  
Gas Chromatography Mass Spectrometry ◽  
Volatile Components ◽  
Germacrene D ◽  
Long Time ◽  
Sample Amount

Volatile components fromExocarpium Citri Grandis(ECG) were, respectively, extracted by three methods, that is, steam distillation (SD), headspace solid-phase microextraction (HS-SPME), and solvent extraction (SE). A total of 81 compounds were identified by gas chromatography-mass spectrometry including 77 (SD), 56 (HS-SPME), and 48 (SE) compounds, respectively. Despite of the extraction method, terpenes (39.98~57.81%) were the main volatile components of ECG, mainly germacrene-D, limonene, 2,6,8,10,14-hexadecapentaene, 2,6,11,15-tetramethyl-, (E,E,E)-, andtrans-caryophyllene. Comparison was made among the three methods in terms of extraction profile and property. SD relatively gave an entire profile of volatile in ECG by long-time extraction; SE enabled the analysis of low volatility and high molecular weight compounds but lost some volatiles components; HS-SPME generated satisfactory extraction efficiency and gave similar results to those of SD at analytical level when consuming less sample amount, shorter extraction time, and simpler procedure. Although SD and SE were treated as traditionally preparative extractive techniques for volatiles in both small batches and large scale, HS-SPME coupled with GC/MS could be useful and appropriative for the rapid extraction and qualitative analysis of volatile components from medicinal plants at analytical level.

Composition of the essential oils of three Malaysian Xylopia species (Annonaceae)

2020 ◽  
Vol 75 (11-12) ◽  
pp. 479-484
Author(s):  
Natasa Mohd Shakri ◽  
Wan Mohd Nuzul Hakimi Wan Salleh ◽  
Shamsul Khamis ◽  
Nor Azah Mohamad Ali ◽  
Muhammad Helmi Nadri
Keyword(s):  
Gas Chromatography ◽  
Essential Oils ◽  
Biological Activities ◽  
Volatile Components ◽  
Aromatic Plants ◽  
Medicinal Uses ◽  
Chemical Structures ◽  
Germacrene D ◽  
Oil Components ◽  
The Rich

AbstractThe rich and diversified Malaysian flora represents an excellent resource of new chemical structures with biological activities. The genus Xylopia L. includes aromatic plants that have both nutritional and medicinal uses. This study aims to contribute with information about the volatile components of three Xylopia species essential oils: Xylopia frutescens, Xylopia ferruginea, and Xylopia magna. In this study, essential oils were extracted from the leaves by a hydrodistillation process. The identification of the essential oil components was performed by gas chromatography (GC-FID) and gas chromatography–coupled mass spectrometry (GC-MS). The major components of the essential oils from X. frutescens were bicyclogermacrene (22.8%), germacrene D (14.2%), elemol (12.8%), and guaiol (12.8%), whereas components of the essential oils from X. magna were germacrene D (35.9%), bicyclogermacrene (22.8%), and spathulenol (11.1%). The X. ferruginea oil was dominated by bicyclogermacrene (23.6%), elemol (13.7%), guaiol (13.4%), and germacrene D (12.3%).

scholarly journals Terpenoid Composition of the Essential Oils of Teucrium royleanum and T. quadrifarium

2010 ◽  
Vol 5 (6) ◽  
pp. 1934578X1000500 ◽  
Author(s):  
Lalit Mohan ◽  
Charu C. Pant ◽  
Anand B. Melkani ◽  
Vasu Dev
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Steam Distillation ◽  
Essential Oil Composition ◽  
Himalayan Region ◽  
Chemical Markers ◽  
Oil Composition ◽  
Remarkable Similarity ◽  
Sesquiterpene Hydrocarbons ◽  
Germacrene D

Teucrium royleanum Wall ex. Benth. and T. quadrifarium Buch.-Ham., growing wild in the Central Himalayan region of Uttarakhand (India), yielded, on steam distillation, 0.07% and 0.09%, respectively of essential oil. The oil samples were analyzed by GC and GC-MS. By GC, both oil samples showed remarkable similarity with respect to the major peaks. Fifty-seven constituents were identified in both the oils representing 96.0% and 96.6% of the total, respectively. The oils were rich in sesquiterpene hydrocarbons (~76.0%). β-Caryophyllene (23.6% and 38.3%), germacrene D (28.9% and 9.4%), α-humulene (5.7% and 5.9%), linalool (4.8% and 1.5%), and 1-octen-3-ol (8.5% and 0.7%) were common to both oils and were the principal constituents. The genus can be classified into two groups on the basis of the present and previous reports on the essential oil composition and chemical markers.

Antimicrobial properties and chemical composition of liquid and gaseous phases of essential oils

2015 ◽  
Vol 69 (8) ◽  
Author(s):  
Kamil Křůmal ◽  
Nela Kubátková ◽  
Zbyněk Večeřa ◽  
Pavel Mikuška
Keyword(s):  
Chemical Composition ◽  
Essential Oils ◽  
Antimicrobial Properties ◽  
Volatile Components ◽  
Contact Method ◽  
Linalyl Acetate ◽  
Lavandula Angustifolia ◽  
Cinnamomum Zeylanicum ◽  
Bacteria And Fungi ◽  
Main Components

AbstractThe antimicrobial properties of fifteen essential oils (EOs) tested on seventeen microorganisms were determined using the vapour-agar contact method. The most effective EOs (i.e. Lavandula angustifolia, Cymbopogon nardus, Citrus aurantifolia, Juniperus communis, Myrtus communis and Cinnamomum zeylanicum), whose volatile components afforded the best antimicrobial properties, were selected for a detailed study of chemical composition. All these six EOs contained one to three main components that presented 67-91 mass % of total mass of a corresponding essential oil. The amount of other components was much lower (less than 5 mass %). The volatile components of Lavandula angustifolia exhibited the most effective antimicrobial properties because they completely inhibited the tested bacteria and fungi within 3 days and 1 week, respectively. The components of Lavandula angustifolia with the highest concentration in the gaseous phase were linalool (99.0 ppmv), eucalyptol (44.9 ppmv), linalyl acetate (25.9 ppmv), myrcene (22.2 ppmv), β-trans-ocimene (19.7 ppmv), camphor (16.7 ppmv) and limonene (14.9 ppmv).

scholarly journals The essential oil content in caraway species (Carum carvi L.)

2011 ◽  
Vol 30 (No. 2) ◽  
pp. 73-79 ◽  
Author(s):  
J. Sedláková ◽  
B. Kocourková ◽  
L. Lojková ◽  
V. Kubáň
Keyword(s):  
Essential Oil ◽  
Essential Oils ◽  
Supercritical Fluid Extraction ◽  
Supercritical Fluid ◽  
Oil Content ◽  
Steam Distillation ◽  
Common Method ◽  
Fluid Extraction ◽  
Main Portion

Caraway fruits contain 1–6% of essential oils consisting of about 30 compounds, from which carvone and limonene account form the main portion, about 95%. To evaluate the quality of various caraway cultivars, the amounts of essential oils and the carvone/limonene ratio were measured. The most common method of essential oil evaluation is steam distillation in accordance with Standard ČSN 58 0110, but an alternative method – supercritical fluid extraction (SFE) – was also investigated in this paper. Ground caraway fruits were extracted under different SFE conditions (pressure, temperature, use of modifiers). Released compounds (carvone and limonene) were quantified by GC.  

scholarly journals Identification of the Volatile Components of Galium verum L. and Cruciata leavipes Opiz from the Western Italian Alps

Molecules ◽  
2020 ◽  
Vol 25 (10) ◽  
pp. 2333 ◽  
Author(s):  
Aldo Tava ◽  
Elisa Biazzi ◽  
Domenico Ronga ◽  
Pinarosa Avato
Keyword(s):  
Essential Oils ◽  
Western Alps ◽  
Volatile Fraction ◽  
Volatile Components ◽  
Italian Alps ◽  
Specialized Metabolites ◽  
Whole Plant ◽  
Fresh Plant Material ◽  
Germacrene D ◽  
Total Oil

The chemical composition of the volatile fraction from Galium verum L. (leaves and flowers) and Cruciata laevipes Opiz (whole plant), Rubiaceae, was investigated. Samples from these two plant species were collected at full bloom in Val di Susa (Western Alps, Turin, Italy), distilled in a Clevenger-type apparatus, and analyzed by GC/FID and GC/MS. A total of more than 70 compounds were identified, making up 92%–98% of the total oil. Chemical investigation of their essential oils indicated a quite different composition between G. verum and C. laevipes, both in terms of the major constituents and the dominant chemical classes of the specialized metabolites. The most abundant compounds identified in the essential oils from G. verum were 2-methylbenzaldheyde (26.27%, corresponding to 11.59 μg/g of fresh plant material) in the leaves and germacrene D (27.70%; 61.63 μg/g) in the flowers. C. laevipes essential oils were instead characterized by two sesquiterpenes, namely β-caryophyllene (19.90%; 15.68 μg/g) and trans-muurola-4(15),5-diene (7.60%; 5.99 μg/g); two phenylpropanoids, benzyl alcohol (8.30%; 6.71 μg/g), and phenylacetaldehyde (7.74%; 6.26 μg/g); and the green-leaf alcohol cis-3-hexen-1-ol (9.69%; 7.84 μg/g). The ecological significance of the presence of such compounds is discussed.

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