scholarly journals Microencapsulation, Chemical Characterization, and Antimicrobial Activity of Mexican (Lippia graveolensH.B.K.) and European (Origanum vulgareL.) Oregano Essential Oils

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Elvia Hernández-Hernández ◽  
Carlos Regalado-González ◽  
Pedro Vázquez-Landaverde ◽  
Isabel Guerrero-Legarreta ◽  
Blanca E. García-Almendárez
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Solid Phase ◽  
Micrococcus Luteus ◽  
Chemical Characterization ◽  
Solvent Polarity ◽  
Volatile Fraction ◽  
Brochothrix Thermosphacta ◽  
Main Component

The effect of solvent polarity (methanol and pentane) on the chemical composition of hydrodistilled essential oils (EO’s) ofLippia graveolensH.B.K. (MXO) andOriganum vulgareL. (EUO) was studied by GC-MS. Composition of modified starch microencapsulated EO’s was conducted by headspace-solid-phase microextraction (HS-SPME). The antimicrobial activity of free and microencapsulated EO’s was evaluated. They were tested againstSalmonellasp.,Brochothrix thermosphacta,Pseudomonas fragi, Lactobacillus plantarum, andMicrococcus luteus. Thymol and carvacrol were among the main components of EO’s and their free and microencapsulated inhibitory activity was tested againstM. luteus, showing an additive combined effect. Chemical composition of EO’s varied according to the solvent used for GC analysis and to volatile fraction as evaluated by HS-SPME. Thymol (both solvents) was the main component in essential oil of MXO, while carvacrol was the main component of the volatile fraction. EUO showedα-pinene (methanol) andγ-terpinene (pentane) as major constituents, the latter being the main component of the volatile fraction. EO’s showed good stability after 3 months storage at 4°C, where antimicrobial activity of microencapsulated EO’s remained the same, while free EO’s decreased 41% (MXO) and 67% (EUO) from initial activity. Microencapsulation retains most antimicrobial activity and improves stability of EO’s from oregano.

scholarly journals Comparison of the Chemical Composition and Antimicrobial Activity of Thymus serpyllum Essential Oils

2015 ◽  
Vol 43 (2) ◽  
pp. 432-438 ◽  
Author(s):  
Aneta WESOŁOWSKA ◽  
Monika GRZESZCZUK ◽  
Dorota JADCZAK ◽  
Paweł NAWROTEK ◽  
Magdalena STRUK
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Micrococcus Luteus ◽  
Gas Chromatography Mass Spectrometry ◽  
E Coli ◽  
Thymus Serpyllum ◽  
Main Components ◽  
Total Oil

The chemical composition of the essential oils obtained by hydrodistillation from the aerial parts of Thymus serpyllum and Thymus serpyllum‘Aureus’ has been investigated by gas chromatography-mass spectrometry (GC-MS). Forty-seven compounds (99.67% of the total oil) wereidentified in the essential oil of T. serpyllum. The main components found in the oil were carvacrol (37.49%), -terpinene (10.79%), -caryophyllene (6.51%), p-cymene (6.06%), (E)--ocimene (4.63%) and -bisabolene (4.51%). Similarly, carvacrol (44.93%), -terpinene(10.08%), p-cymene (7.39%) and -caryophyllene (6.77%) dominated in the oil of T. serpyllum ‘Aureus’. A total of forty three compounds wereidentified in this oil, representing 99.49% of the total oil content. On the basis of the obtained data it was proved that the content of 1-octen-3-ol,eucalyptol, (Z)--ocimene, (E)--ocimene, -terpinene, carvacrol methyl ether, germacrene D and -bisabolene was significantly higher for T.serpyllum while T. serpyllum ‘Aureus’ was characterized by a significantly higher content of 3-octanone, 3-octanol, p-cymene, borneol andcarvacrol. The isolated essential oils were evaluated for their antimicrobial activity against nine reference strains (Escherichia coli, Staphylococcusaureus, Staphylococcus epidermidis, Streptococcus agalactiae, Enterococcus faecalis, Bacillus cereus, Micrococcus luteus, Proteus vulgaris and Candidaalbicans) by the microdilution technique. Based on this test, the minimum inhibitory concentrations (MIC) of essential oil were calculated. Thevolatile oil obtained from T. serpyllum showed the highest antimicrobial activity relative to the strain of E. coli (MIC=0.025 μL/mL) and to theyeast C. albicans (MIC=0.05 μL/mL). Similarly, a significant antimicrobial activity exhibited T. serpyllum ‘Aureus’ essential oil, although the MICvalues obtained in that case for E. coli and C. albicans strains were twice as high and were respectively 0.05 μL/mL and 0.1 μL/mL.

scholarly journals Chemical Composition and Antimicrobial Activity of the Essential Oils of Leaves, Roots and Bark of Glossocalyx staudtii

2009 ◽  
Vol 4 (8) ◽  
pp. 1934578X0900400 ◽  
Author(s):  
Huguette Agnaniet ◽  
Thomas Makani ◽  
Raphaël Bikanga ◽  
Louis Clément Obame ◽  
Jacques Lebibi ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Disc Diffusion ◽  
Aliphatic Compounds ◽  
Gram Positive Bacteria ◽  
Agar Disc ◽  
Leaf Oil ◽  
Main Component

The chemical composition of the essential oils obtained by hydrodistillation from air dried leaves, bark and roots of Glossocalyx staudtii Engl. grown in Gabon was analyzed by GC and GC-MS. The essential oil content was 0.84% (w/w), 0.28% (w/w), and 0.74% (w/w), respectively. The leaf oil was characterized by a high content of monoterpene hydrocarbons (64.8%), with β-pinene (30.6%) and α-pinene (22.6%) as the major constituents. The oil obtained from the bark contained 30.5% of oxygenated monoterpenes with cryptone as the main constituent (11.5%) and 28.9% of aliphatic compounds, with 9.3% of 2-tridecanone; in the roots oil, the main component was 2-tridecanone (55.2%). The antimicrobial activity of the oils was studied by means of the agar disc diffusion and broth microdilution methods. The Gram positive bacteria were the most sensitive to the essential oils. A significant anticandidal effect of the bark essential oil was observed.

scholarly journals Effect of the Distillation Time on the Chemical Composition, Antioxidant Potential and Antimicrobial Activity of Essential Oils from Different Cannabis sativa L. Cultivars

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4770
Author(s):  
Sara Palmieri ◽  
Francesca Maggio ◽  
Marika Pellegrini ◽  
Antonella Ricci ◽  
Annalisa Serio ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Cannabis Sativa ◽  
Central Italy ◽  
Antioxidant Potential ◽  
Volatile Fraction ◽  
Food Borne ◽  
Spoilage Bacteria ◽  
First Time

Within the unavoidable variability of various origins in the characteristics of essential oils, the aim of this study was to evaluate the effect of the distillation time on the chemical composition and biological activity of Cannabis sativa essential oils (EOs). The dry inflorescences came from Carmagnola, Kompolti, Futura 75, Gran Sasso Kush and Carmagnola Lemon varieties from Abruzzo region (Central Italy), the last two being new cultivar here described for the first time. EOs were collected at 2 h and 4 h of distillation; GC/MS technique was applied to characterize their volatile fraction. The EOs were evaluated for total polyphenol content (TPC), antioxidant capacity (AOC) and antimicrobial activity against food-borne pathogens and spoilage bacteria. The time of distillation particularly influenced EOs chemical composition, extracting more or less terpenic components, but generally enriching with minor sesquiterpenes and cannabidiol. A logical response in ratio of time was observed for antioxidant potential, being the essential oils at 4 h of distillation more active than those distilled for 2 h, and particularly Futura 75. Conversely, except for Futura 75, the effect of time on the antimicrobial activity was variable and requires further investigations; nevertheless, the inhibitory activity of all EOs against Pseudomonas fluorescens P34 was an interesting result.

scholarly journals Chemical Composition and Antimicrobial Activity of Essential Oil from Phytolacca dodecandra Collected in Ethiopia

Molecules ◽  
2019 ◽  
Vol 24 (2) ◽  
pp. 342 ◽  
Author(s):  
Wondwosen Matebie ◽  
Wanchang Zhang ◽  
Guangbo Xie
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Solid Phase ◽  
Antimicrobial Activities ◽  
Gas Chromatography Mass Spectrometry ◽  
Microdilution Method ◽  
Phytolacca Dodecandra ◽  
The Difference

The essential oil from Phytolacca dodecandra, a traditional herb of Ethiopia, has been studied, including the chemical composition and antimicrobial activity. The difference between four P. dodecandra samples (P-1–P-4), which differed in gender or location, has also been analyzed. The essential oils were obtained by steam distillation, while the aromas were extracted by head space solid-phase microextraction (HS-SPME) and both were analyzed by gas chromatography- mass spectrometry (GC-MS). The oils’ antimicrobial activities were evaluated by the microdilution method against Escherichia coli, Staphylococcus aureus, Bacillus subtilis and Candida albicans. Ninety one components, representing 88.37 to 94.01% of the aromas, were identified. The compositions of the aromas of four samples are mainly dominated by aldehydes and ketones: 2-nonanone (1.80–30.80%), benzaldehyde (4.99–25.99%), and sulcatone (2.34–5.87%). Sixty components representing 64.61 to 69.64% of the oils were identified, and phytone (3.04–21.23%), phytol (4.11–26.29%) and palmitic acid (1.49–23.87%) are the major compounds. No obvious antimicrobial activity was observed for all the four essential oils.

scholarly journals Essential oils of Thymus pulegioides and Thymus glabrescens from Romania: Chemical composition and antimicrobial activity

2010 ◽  
Vol 75 (1) ◽  
pp. 27-34 ◽  
Author(s):  
Mariana Pavel ◽  
Mihailo Ristic ◽  
Tatjana Stevic
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Micrococcus Luteus ◽  
Antimicrobial Properties ◽  
Herbal Drug ◽  
Qualitative And Quantitative Analysis ◽  
Gram Positive Bacteria ◽  
Main Components

The aim of this work was to analyse the chemical composition and antimicrobial properties of essential oils isolated from two wild-growing species of thyme (Thymus pulegioides L. and T. glabrescens Willd.) originating from different locations in Romania. The yield of essential oil was determined according to European Pharmacopoeia standards. Qualitative and quantitative analysis of the oils was performed using GC and GC/MS. The antimicrobial activity was tested by the microdilution technique against Gram-negative and Gram-positive bacteria (Escherichia coli, Salmonella typhimurium, S. enteritisdis, Enterobacter cloacae, Pseudomonas aeruginosa, Proteus mirabilis, Staphylococcus aureus, S. epidermidis, Streptococcus faecalis, Bacillus subtilis, Micrococcus luteus, M. flavus and Listeria monocytogenes) and human pathogen yeast Candida albicans. The essential oil of Thymus pulegioides was obtained in a yield of 0.7-1 % (v/d.w. herbal drug) and the main components were carvacrol (50.5-62.6 %), ?-terpinene (9.8-9.9 %) and p-cymene (5.8-7.1 %). The essential oil of T. glabrescens was obtained in a yield of 0.7 (v/d.w. herbal drug) and the main components were geraniol (55.5 %), neryl acetate (11.1 %) and ?-bisabolene (6.7 %). The essential oils inhibited microbial growth at concentrations of 10.8-27 ?l/ml.

scholarly journals Effect of Geographic Location, Ontogenesis on Essential Oil Composition and Spontaneously Emitted Volatile Organic Compounds of Inula viscosa (L.) Greuter. (Astraceae) Grown in Jordan

2020 ◽  
Vol 32 (10) ◽  
pp. 2559-2566
Author(s):  
Reem N. Dabibeh ◽  
Lina M. Barhoumi ◽  
Omar Bdair ◽  
Hala I. Al-Jaber ◽  
Fatma U. Afifi ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Volatile Organic Compounds ◽  
Essential Oils ◽  
Organic Compounds ◽  
Solid Phase ◽  
Vegetative Period ◽  
Aerial Parts ◽  
Full Flowering ◽  
Volatile Organic ◽  
Main Component

The present study aimed at investigating the variation in the chemical composition of emitted volatile organic compounds (VOCs) and essential oils obtained from fresh aerial parts of Inula viscosa (Asteraceae) as affected by growth stage and geographical location zone. VOCs were extracted by solid phase microextraction (SPME) method from whole aerial parts of I. viscosa during the vegetative (spring-August) period, and from fresh leaves, closed pre-flowering buds and fully expanded flowers during the full flowering season (October). The essential oils were extracted by hydrodistillation form fresh organs during the flowering stage. GC/MS analysis of VOCs during the vegetative period revealed sesquiterpene hydrocarbons as main components in the samples collected from the Mediterranean zone (MID-1: 64.72-27.48%, MID-2: 32.09-76.77%). The profile of the samples from the Irano-Turanian zone (IT) was quite different. Myrcenol was the main component in the leaves, pre-flowering buds and fully expanded flowers from all locations (0.61-39.01%). E-nerolidol was the main component in the hydrodistilled oil of all organs from the different locations (73.72-88.66 %). Principle component and cluster analysis revealed that the chemical composition of the essential oils and VOCs belonging to MID-zone were similar and quite different when compared to the composition of the samples belonging to IT-zone. The results indicated the possible use of E-nerolidole as a stable chemotype marker in I. viscosa taxonomy.

Chemical composition and antimicrobial activity of the essential oils of flowers, leaves and stems of Cotinus coggygria

Planta Medica ◽  
2008 ◽  
Vol 74 (09) ◽  
Author(s):  
T Milošević ◽  
N Nićiforović ◽  
V Mihailović ◽  
S Solujić ◽  
N Vuković
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oils ◽  
Cotinus Coggygria

Chemical composition and antimicrobial activity of essential oils of selected Apiaceous plants growing in Egypt

Planta Medica ◽  
2016 ◽  
Vol 81 (S 01) ◽  
pp. S1-S381
Author(s):  
N Khalil ◽  
M Ashour ◽  
S Fikry ◽  
A NaserSingab ◽  
O Salama
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oils

Chemical composition and antimicrobial activity of the essential oils of Micromeria thymifolia, M. dalmatica and Satureja cuneifolia

Planta Medica ◽  
2007 ◽  
Vol 73 (09) ◽  
Author(s):  
N Menković ◽  
G Zdunić ◽  
S Tasić ◽  
M Ristić ◽  
T Stević ◽  
...  
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oils

scholarly journals Variability in chemical composition and antimicrobial activity of essential oil of Rosa × damascena Herrm. from mountainous regions of Iran

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Mansureh Ghavam ◽  
Afsaneh Afzali ◽  
Maria Manconi ◽  
Gianluigi Bacchetta ◽  
Maria Letizia Manca
Keyword(s):  
Antimicrobial Activity ◽  
Chemical Composition ◽  
Essential Oil ◽  
Essential Oils ◽  
Environmental Conditions ◽  
Raw Materials ◽  
Rosa Damascena ◽  
Mountainous Regions ◽  
Aspergillus Brasiliensis ◽  
Suitable Area

Abstract Background Essential oil of Rosa × damascena Herrm. is one of the most valuable and important raw materials for the flavor and fragrance industry. The cultivation of this plant has ancient origins, and Kashan was one of the first mountainous regions of Iran dealing with the cultivation of R. × damascena. In this study, both chemical composition and antimicrobial activity of different rose essential oils obtained from five mountainous areas of Kashan region (Maragh, Qamsar, Sadeh, Javinan, and Kamoo) has been investigated along with the influence of the environmental conditions on these properties. Results Results showed that yield and chemical composition of essential oils obtained from Rosa × damascena were significantly affected by the collection area. In particular, the yield of oils varied from ~0.08 to ~0.132% and citronellol (36.70-9.18%), geraniol (12.82-0.47%), nonadecane (22.73-10.36%), heneicosane (31.7-11.43%), and 1-nonadecene (6.03-3.93%) have been detected as main compounds in all the plants collected, but at different concentrations depending on the collection area. The best fragrance and the highest yield were found in the oil from Kamoo area. Similarly to the chemical composition, the antimicrobial activity of the essential oils was affected by their origin, and essential oil obtained from plants collected from Kamoo area disclosed the highest antibacterial and antifungal efficacy. Its inhibition halos were 17.33±0.58 mm against Aspergillus brasiliensis, 15.67±0.58 mm against Staphylococcus aureus, and 12.33±0. 58 mm against Streptococcus pyogenes. Essential oils of R. damascena were also effective against Gram-negative Pseudomonas aeruginosa and they had a MIC value of 62.50 μg/mL irrespective of the collection area (except the oil from Javinan area). On the contrary, the highest antifungal power against Candida albicans yeast was reached using the essential oil obtained from plants collected in Javinan region (MIC and MBC ~62.50 μg/mL). Conclusions Overall results underline the influence of environmental conditions of the different areas of Kashan region, on the chemical composition of and antimicrobial activity of the essential oils of Rosa × damascena. In addition, results disclosed that Kamoo seemed to be the most suitable area for the competitive cultivation of R. × damascena to the intensive production of aromatic flower oil and natural antimicrobial essential oils.

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