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Fragrance Finishing on Textile Substrate for Odour Control
Published in G. Thilagavathi, R. Rathinamoorthy, Odour in Textiles, 2022
Thillaipandian Hemamalini, Venkateshwarapuram Rengaswami Giri Dev
Thyme oil (Thymus vulgaris) is widely used for treating several diseases due to its antiseptic, antimicrobial, antifungal, antioxidative, and antiviral properties. Microcapsules containing thyme oil were prepared using an emulsion containing gelatin/water and thyme oil to which gum arabic was added, and the resulting capsules were dried. The prepared coacervate was padded on the polyester nonwoven fabric, followed by air drying, and tested for antibacterial activity, Escherichia coli, Staphylococcus aureus, and Candida albicans. It was reported that the microcapsules were formed of size 25 micron, with the essential oil-loading capacity of 74%, and offered antibacterial activity suitable for the preparation of bandages and surgical gowns (Karagonlu et al. 2018).
Herbal Product Development and Characteristics
Published in Anil K. Sharma, Raj K. Keservani, Surya Prakash Gautam, Herbal Product Development, 2020
Mirian Pateiro, Rubén Domínguez, Predrag Putnik, Danijela Bursać Kovačević, Francisco J. Barba, Paulo S. E. Munekata, Elena Movilla Fierro, José M. Lorenzo
The Thyme genus is highlighted for their great antioxidant power. As mentioned previously, T. pulegioides and T. vulgaris are mostly used. T. pulegioides has an important antioxidant activity (Schaffer et al., 2004), while related radical scavenging is bind to main components present in essential oils. Among them, linalool stands out, as well as thymol, carvacrol, γ-terpinene, p-cymene, geraniol, and geranial (Ložienė et al., 2007). A similar composition and antioxidant activity was observed in the essential oil of T. vulgaris. Isolated thymol, carvacrol, ρ-cymene, γ-terpinene, and linalool are also found among more than 60 compounds from their chemical profile (Lorenzo et al., 2018b).
Can Origanum be a hope for cancer treatment? A review on the potential of Origanum species in preventing and treating cancers
Published in International Journal of Environmental Health Research, 2023
Carvacrol (2-methyl-5-(1-methylethyl)-phenol), a phenolic compound and isomer of thymol, is abundant in plants containing thyme and oregano (Suntres et al. 2015). Slightly soluble in water, but well soluble in alcohol and ether, carvacrol is volatile and shows alkaline properties. As a powerful antiseptic and germicidal, it is included in the composition of preparations used in medicine and orally. Artificial carvacrol is produced from carvone or p-cymene synthesized from d-limonene. Carvacrol is synthesized by many methods, such as sulfonation of p-cymene (Phillips 1924), chlorination of α-pinene with tert-butyl hypochlorite (Ritter and Ginsburg 1950) and alkali fusion or the aromatization of carvone using sulfuric acid and amberlyst 15 catalyst (Gozzi et al. 2009). A method based on the alkylation of o-cresol with propylene or isopropyl alcohol over solid acid catalysts was reported as a cleaner and greener process in the chemical synthesis of carvacrol. In the aforementioned method, carvacrol can be obtained up to 82% yield at 180°C (Yadav and Kamble 2009).
Evaluation of filter media covered with spun fibres and containing thyme essential oil with antimicrobial properties
Published in Environmental Technology, 2022
Ana Isabela Pianowski Salussoglia, Clovis Wesley Oliveira de Souza, Eduardo Hiromitsu Tanabe, Mônica Lopes Aguiar
The agar well diffusion method, applied using the bacteria Escherichia coli and Staphylococcus aureus, was performed using the cinnamon, clove, oregano, and thyme essential oils. For Staphylococcus aureus and Escherichia coli, respectively, the diameters of the inhibition haloes were 70.5 ± 0.5 and 23.2 ± 1.8 mm for thyme essential oil, 26.2 ± 0.7 and 25.5 ± 0.5 mm for cinnamon essential oil, 20.5 ± 0.8 and 15.8 ± 0.1 mm for clove essential oil, and 41.3 ± 3.1 and 17.0 ± 0.6 mm for oregano essential oil. The thyme essential oil showed the best performance, so it was chosen as an antimicrobial agent. Khan et al. [53] obtained inhibition haloes of 31 mm for Escherichia coli and 25 mm for Staphylococcus, using 15 μL of essential oil from a variety of thyme in Pakistan. Walentowska and Foksowicz-Flaczyk [54] found an antimicrobial effect, using the inhibition halo test, for 8% thyme essential oil used for the protection of natural textiles. There were no counts for Corynebacterium xerosis, Micrococcus luteus, and Staphyloccocus haemolyticus, while the inhibition haloes exceeded 5 mm for Bacillus licheniformis, Staphyloccocus aureus, Escherichia coli, Klebsiella pneumoniae, and Pseudomonas aeruginosa.
Spray-dried thyme essential oil microparticles using different polymeric matrices
Published in Drying Technology, 2021
Gerson Reginaldo Marques, Regiane Victória de Barros Fernandes, Amanda Maria Teixeira Lago, Soraia Vilela Borges, Suzan Kelly Vilela Bertolucci, Annete de Jesus Boari Lima, Diego Alvarenga Botrel
The antioxidant activities of the essential oil obtained from pure and encapsulated thyme essential oil were evaluated by the method of free radical sequestration DPPH•. This method is based on the electron transfer of antioxidant compounds present in the samples to the radical DPPH•, because in order to receive this electron color is reduced. The strength of antioxidant activity found in pure and encapsulated thyme essential oil is related to the presence of hydroxyl (-OH) groups that are capable of donating a hydrogen atom to prevent or stabilize free radicals.[5] Thyme essential oil and its main antioxidant compounds, including thymol and carvacrol, have a hydroxyl group.