Comparative chemical and antimicrobial study of nine essential oils obtained from medicinal plants growing in Egypt

Tarek, Nashwa; Hassan, Hossam M.; AbdelGhani, Sameh; Radwan, Ismail; Hammouda, Ola; El-Gendy, Ahmed O.

doi:10.1016/j.bjbas.2014.05.009

Cited by 47 publications

(33 citation statements)

References 30 publications

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“…This values are similar with those reported in a study about essential oils for cosmetic use from South Africa [13]. Instead, the density of the essential oils obtained through hydrodistillation from nine medicinal herbs grown in Egipt, varied between 1.206 and 1.228 g·cm -3 [14].…”

Section: Results and Discussion Physico-chemical Analysessupporting

confidence: 89%

Analytical Characterisation of Original Emulsion for Cosmetic Use

Stanciu¹,

Oancea²,

Oancea³

et al. 2019

Rev. Chim.

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The aim of the paper is to characterize an original emulsion containing a mixture of plant macerates and essences. Next the wild and/or garden plants, namely Abies sp. (leaves), Crataegus monogyna (flowers), Hypericum perforatum (flowers), Lavandula angustifolia (flowers), Lavandula officinalis (flowers), Lilium sp. (flowers), Melissa officinalis (flowers), Mentha silvestris (leaves and flowers), Mentha piperita (leaves and flowers), Origanum vulgare (leaf blooms and flowers), Pinus silvestris (buds), Populus nigra (buds) and Thymus serpillum (flowers) have been processed to prepare the studied emulsion. Some of the emulsion ingredients as the essential oils of single plant and plant mixture, or the lily flowers macerate together with the final product have been analyzed. The measurements of physical and chemical properties (refractive index, density, pH, oxidation-reduction potential, acidity index, peroxide index and iodine index) led to interesting results that could explain the curative effects on skin. The beneficial effects of new emulsion are due to the bioactive compounds that penetrate deep into the tissue and ensure regeneration. The obtained results confirm our previous findings concerning the opportunity of measurements of oxidation/reduction potentials for cosmetic mixtures regarding the antioxidant activity description.

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Section: Results and Discussion Physico-chemical Analysessupporting

confidence: 89%

Analytical Characterisation of Original Emulsion for Cosmetic Use

Stanciu¹,

Oancea²,

Oancea³

et al. 2019

Rev. Chim.

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“…oil, at a concentration range of 0.3-1.6 mg ml À1 , has previously been demonstrated (29). TAREK et al (30) have also demonstrated no antibacterial effect of clove oil in dimethyl sulphoxide (DMSO) on Pseudomonas aeruginosa, even at the highest concentration of clove oil, of 16 mg ml À1 . Thus, the clove oil traditionally used in oral treatments does not exhibit antibacterial activity.…”

Section: Discussionmentioning

confidence: 99%

Anti‐biofilm and antibacterial activities of zinc oxide nanoparticles against the oral opportunistic pathogens Rothia dentocariosa and Rothia mucilaginosa

Khan

Ahamed

Musarrat

et al. 2014

European J Oral Sciences

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Species of the genus Rothia that inhabit the oral cavity have recently been implicated in a number of diseases. To minimize their role in oral infections, it is imperative to reduce and/or control the growth and biofilm formation activity of Rothia spp. In this study, two bacterial isolates, Ora-7 and Ora-16, were obtained from the oral cavity of a healthy male subject and identified as Rothia dentocariosa and Rothia mucilaginosa, respectively, using a polyphasic taxonomic approach. Antimicrobial and anti-biofilm formation activities of zinc oxide nanoparticles (ZnO-NPs), of average size 35 nm, were assessed in in vitro assays using Crystal Violet and live and dead staining techniques. The ZnO-NPs exhibited an IC50 value of 53 and 76 μg ml(-1) against R. dentocariosa and R. mucilaginosa, respectively. Biofilm-formation assays, performed on the surfaces of polystyrene plates, artificial teeth, and dental prostheses, revealed the efficacy of ZnO-NPs as a potential antibacterial agent for controlling the growth of Rothia isolates in both planktonic form and biofilm.

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“…17 For each sample, different concentrations were diluted with Muller Hinton broth to give a nal concentration ranging from (1000 mg mL À1 -6.25 mg mL À1 ). In the presence of both positive and negative control tubes, the bacterial isolate was sub-cultured on Muller Hinton Agar (M. H. A) and incubated at 37 C for 24 h. 18 The colony from the tested microorganisms was suspended in 5 mL saline then the suspension was adjusted to 0.5 McFarland standards to yield the organism suspension of 1 Â 10 8 CFU mL À1 . The bacterial suspension was diluted with saline to obtain 10 7 CFU mL À1 .…”

Section: Isolation and Identication Of Bacterial Pathogensmentioning

confidence: 99%

Gamma radiation as a green method to enhance the dielectric behaviour, magnetization, antibacterial activity and dye removal capacity of Co–Fe LDH nanosheets

et al. 2019

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Nowadays, improving the physico-chemical properties of nanomaterials to enhance their performance towards various applications is urgent. Accordingly, gamma irradiation (GI) has evolved and attracted wide attention as a promising green technique to meet this need. In the current study, a Co-Fe LDH was used as a model 2D nanomaterial and was irradiated by GI (dose ¼ 100 kGy). The sample was characterized via XRD, FTIR, FESEM, HRTEM, hydrodynamic size, zeta potential, and BET surface area measurements. The results showed that after irradiation, the surface area of the sample increased from 83 to 89 m 2 g À1 . Moreover, irradiation increased its dielectric constant, dielectric loss and AC conductivity. In addition, the sample showed superparamagnetic behavior, where its saturation magnetization increased from 1.28 to 52.04 emu g À1 after irradiation. Furthermore, the adsorption capacity of the irradiated LDH towards malachite green (MG) and methylene blue (MB) as model wastewater pollutants was also studied. The exposure of LDH to GI enhanced its adsorption capacity for MG from 44.73 to 54.43 mg g À1 . The Langmuir-Freundlich, Sips, and Baudu models were well suited for both MG and MB adsorption among the six fitted isotherm models. The pseudo-first and second order models fit the adsorption kinetics better than the intraparticle diffusion model for both dyes. The interaction of MB and MG with the LDH surface was further investigated in dry and aqueous solution using Grand canonical Monte Carlo and molecular dynamics simulations. These two techniques provided insight into the adsorption mechanism, which is vital to understand the adsorption process by the LDH nanosheets and their possible use in practical applications. Moreover, the Co-Fe LDH showed good antibacterial activity against both Gram-positive and Gram-negative bacteria strains. Furthermore, due to its magnetic property, the Co-Fe LDH could be simply recovered from water by magnetic separation at a low magnetic field after the adsorption process.

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Comparative chemical and antimicrobial study of nine essential oils obtained from medicinal plants growing in Egypt

Cited by 47 publications

References 30 publications

Analytical Characterisation of Original Emulsion for Cosmetic Use

Analytical Characterisation of Original Emulsion for Cosmetic Use

Anti‐biofilm and antibacterial activities of zinc oxide nanoparticles against the oral opportunistic pathogens Rothia dentocariosa and Rothia mucilaginosa

Gamma radiation as a green method to enhance the dielectric behaviour, magnetization, antibacterial activity and dye removal capacity of Co–Fe LDH nanosheets

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