Variation in chemical composition and biological properties of two Tunisian Eucalyptus essential oils under three eco-friendly extraction techniques

Essential oils constitute a heterogeneous collection of chemical compounds. Their main characteristics are that they all synthesized by plants and are volatile and mostly soluble in ethanol. They have traditionally been obtained from plants and they have been widely used for insecticidal, medicinal and cosmetic purposes. Essential oils contains about 20–60 components at quite different concentrations and they are characterized by two or three major components at fairly high concentrations. Lately, the essential oils and various extracts of plants have gained special interest as sources of natural antimicrobial and antioxidant agents because of the resistance to antibiotics that some microorganisms have acquired and the possible toxicities of the synthetic antioxidants. Spices consumed daily in different types of food to improve flavors, since ancient times, are well known for their antioxidant and antimicrobial properties. During recent decades, numerous numbers of plants have been monitored for their possible role as repellents and insecticides. In this review, the chemical composition profile of some important medicinal plants was evaluated, then antimicrobial properties of a number of essential oils was compared. Antioxidant activity of some essential oils was also considered. Finally, essential oil repellent properties an an important characteristics was evaluated. Further investigation for available data related to the other biological properties of medicinal plants essential oil is recommended.DOI: http://dx.doi.org/10.3126/ijls.v9i2.12043 International Journal of Life Sciences 9 (2) : 2015; 9-13

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Chemical composition and biological properties of Pelargonium graveolens, Leptospermum petersonii and Cymbopogon martinii var. motia essential oils and of Rosa centifolia absolute

Journal of the Serbian Chemical Society ◽

10.2298/jsc210729096n ◽

2021 ◽

pp. 96-96

Author(s):

Milos Nikolic ◽

Tatjana Markovic ◽

Dejan Markovic ◽

Ricardo Calhelha ◽

Ângela Fernandes ◽

...

Keyword(s):

Chemical Composition ◽

Essential Oils ◽

Biological Properties ◽

Sem Analysis ◽

Geranyl Acetate ◽

Biofilm Inhibition ◽

Pelargonium Graveolens ◽

Cymbopogon Martinii ◽

Pathogenic Microbes ◽

Insight Into

Chemical composition of the essential oils (EO) of Pelargonium graveolens, Leptospermum petersonii and Cymbopogon martinii var. motia, and the absolute of Rosa centifolia and their bioactivity were examined. Major compounds in P. graveolens EO were monoterpene alcohols citronellol, geraniol and linalool; in L. petersonii EO monoterpene aldehydes geranial, neral and citronellal; in C. martiniii var. motia EO monoterpene alcohol geraniol and ester geranyl acetate, while in absolute of R. centifolia aromatic alcohol 2-phenyl-ethanol. The EO of L. petersonii showed the strongest antibacterial while the EO of C. martinii var. motia the strongest antifungal potential. The best biofilm inhibition capacity was observed with R. centifolia absolute. The results of Scanning Electron Microscopy (SEM) analysis indicated that the EOs of L. petersonii and P. graveolens changed the number and morphology of C. albicans cells. The L. petersonii EO was the most potent toward tumour cells and exhibited the best biological activity. This is first comparative report summarizing efficacy of studied aromatic samples against pathogenic microbes, providing deeper insight into the modes of antimicrobial action, and at the same time describing their cytotoxicity against cell lines.

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Chemical Composition and Biological Properties of Essential Oils of Two Mint Species

Tropical Journal of Pharmaceutical Research ◽

10.4314/tjpr.v12i4.20 ◽

2013 ◽

Vol 12 (4) ◽

Cited By ~ 6

Author(s):

ML Tsai ◽

CT Wu ◽

TF Lin ◽

WC Lin ◽

YC Huang ◽

...

Keyword(s):

Chemical Composition ◽

Essential Oils ◽

Biological Properties

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Essential Oils Extracted from Organic Propolis Residues: An Exploratory Analysis of Their Antibacterial and Antioxidant Properties and Volatile Profile

Molecules ◽

10.3390/molecules26154694 ◽

2021 ◽

Vol 26 (15) ◽

pp. 4694

Author(s):

Natália Y. Ikeda ◽

Carmen M. S. Ambrosio ◽

Alberto Claudio Miano ◽

Pedro L. Rosalen ◽

Eduardo M. Gloria ◽

...

Keyword(s):

Antioxidant Activity ◽

Chemical Composition ◽

Essential Oils ◽

Antioxidant Properties ◽

Biological Properties ◽

Volatile Profile ◽

Pig Production ◽

Industrial Processing ◽

E Coli ◽

Minor Compounds

The industrial processing of crude propolis generates residues. Essential oils (EOs) from propolis residues could be a potential source of natural bioactive compounds to replace antibiotics and synthetic antioxidants in pig production. In this study, we determined the antibacterial/antioxidant activity of EOs from crude organic propolis (EOP) and from propolis residues, moist residue (EOMR), and dried residue (EODR), and further elucidated their chemical composition. The EOs were extracted by hydrodistillation, and their volatile profile was tentatively identified by GC-MS. All EOs had an antibacterial effect on Escherichia coli and Lactobacillus plantarum as they caused disturbances on the growth kinetics of both bacteria. However, EODR had more selective antibacterial activity, as it caused a higher reduction in the maximal culture density (D) of E. coli (86.7%) than L. plantarum (46.9%). EODR exhibited mild antioxidant activity, whereas EOMR showed the highest antioxidant activity (ABTS = 0.90 μmol TE/mg, FRAP = 463.97 μmol Fe2+/mg) and phenolic content (58.41 mg GAE/g). Each EO had a different chemical composition, but α-pinene and β-pinene were the major compounds detected in the samples. Interestingly, specific minor compounds were detected in a higher relative amount in EOMR and EODR as compared to EOP. Therefore, these minor compounds are most likely responsible for the biological properties of EODR and EOMR. Collectively, our findings suggest that the EOs from propolis residues could be resourcefully used as natural antibacterial/antioxidant additives in pig production.

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Comparison of Chemical Composition and Biological Properties of Essential Oils Obtained by Hydrodistillation and Steam Distillation of Laurus nobilis L.

Plant Foods for Human Nutrition ◽

10.1007/s11130-020-00834-y ◽

2020 ◽

Vol 75 (4) ◽

pp. 495-504

Author(s):

Kristýna Řebíčková ◽

Tomáš Bajer ◽

David Šilha ◽

Karel Ventura ◽

Petra Bajerová

Keyword(s):

Chemical Composition ◽

Essential Oils ◽

Steam Distillation ◽

Biological Properties ◽

Laurus Nobilis

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Chemical Composition, Antioxidant and Antimicrobial Activities of the Essential Oil and its Fractions of Lavandula stoechas L. From Morocco

International Journal of Current Pharmaceutical Review and Research ◽

10.25258/ijcprr.v8i01.9092 ◽

2017 ◽

Vol 8 (01) ◽

Author(s):

Ez Zoubi Yassine ◽

El Ouali Lalami Abdelhakim ◽

Bousta Dalila ◽

Polissiou Moschos ◽

Daferera Dimitra ◽

...

Keyword(s):

Chemical Composition ◽

Essential Oil ◽

Essential Oils ◽

Antimicrobial Agents ◽

Antioxidant Properties ◽

Antimicrobial Activities ◽

Biological Properties ◽

Multi Drug Resistance ◽

Lavandula Stoechas ◽

Natural Foods

The emerging multi-drug resistance in food borne pathogens and consumers demand for minimally processed fresh natural foods has paved the path for natural antimicrobials and antioxidants to be used in food industry. This work investigates the chemical composition, antimicrobial and antioxidant properties of essential oils of Lavandula stoechas and its fractions which were obtained from the Lavandula stoechas using apparatus Glass Oven B-585. GC/MS analysis of Lavandula stoechas essential oil has led to the identification of 27 components, of which camphor, fenchone, camphene, borneol, α- Pinene and 1,8-cineole, were the major components. Fractions 1 and 2 have displayed qualitative similarities; fraction 3 has showed a different chemical profile characterized by the presence of various oxygenated sesquiterpenes. In DPPH assay, the IC50 value of Lavandula stoechas and its fractions have varied between 0.8 and 1.6 µg/ml, while phosphomolybdenum assay of essential oils of Lavandula steochas, fraction 1, 2 and 3 have showed values in the order of 79 ± 4.4, 73.7 ± 3.7, 76.2 ± 5.5 and 148.2 ± 6.2 μg/ml respectively. The essential oil of Lavandula steochas was very active against Staphylococcus aureus and Listeria spp. Fractions 1 and 2 were moderately active, however fraction 3 recorded a weak effect against all bacteria’s. The Chloromphenicol antibiotic was very active against all bacteria’s, Gentamycin has expressed average activity against pathogens but the Penicillin has showed poor activity. Our results suggest that essential oils of Lavandula stoechas and fraction 3 demonstrated interesting biological properties that suggest its use as a new potential source of natural antioxidant and antimicrobial agents.

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