Teor e composição do óleo essencial de patchouli (Pogostemon cablin (Blanco) Benth.) após diferentes tempos de secagem em estufa e temperatura ambiente
Abstract:RESUMO:Patchouli é uma espécie aromática pertencente à família Lamiaceae que possui óleo essencial com alto valor comercial devido à aplicação nas indústrias de higiene, cosméticos e perfumarias. Considerando as características voláteis e estruturas de armazenamento em diferentes órgãos das plantas aromáticas, a determinação de métodos de secagem é de extrema importância e pode afetar tanto o rendimento como a composição do óleo essencial. Este trabalho teve como objetivo principal avaliar o teor e a composiçã… Show more
“…Considering the storage structures found in different organs and the volatile constituents of the aromatic plants, the selection of the appropriate drying methods is important because drying can affect the yield and the chemical composition of the essential oil [35,48]. We did not find previous studies evaluating the effect of different drying conditions on the yield of essential oil of L. thymoides, however, Ebadi et al (2015) [49] investigated the drying of Lippia citriodora leaves using different methodologies including oven-drying (40, 50, and 60 • C), and they found that the increase in temperature generated damage to glandular trichomes, which may have favored the loss of volatiles and the reduction in the yield [49].…”
Section: Drying Effects On Essential Oil Yieldmentioning
confidence: 99%
“…However, drying can cause changes in the yield of essential oils, polyphenols, pigments, and vitamin contents as well as appearance, taste, and color [32]. Different drying techniques have been applied to various aromatic plants to evaluate the effect of drying on the color, composition, and yield of the essential oils as well as to determine the best method for drying a specific plant [33][34][35][36][37].…”
Leaves of Lippia thymoides (Verbenaceae) were dried in an oven at 40, 50 and 60 °C and the kinetic of drying and the influence of the drying process on the chemical composition, yield, and DPPH radical scavenging activity of the obtained essential oils were evaluated. The composition of the essential oils was determined with gas chromatography-mass spectrometry and gas chromatography-flame ionization detection analyses. The influence of drying on the chemical composition of the essential oils of L. thymoides was evaluated by multivariate analysis, and their antioxidant activity was investigated via the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. The Midilli model was the most appropriate to describe the behavior of drying kinetic data of L. thymoides leaves. Thymol was the major compound for all analyzed conditions; the maximum content was obtained from fresh leaves (62.78 ± 0.63%). The essential oils showed DPPH radical scavenging activity with an average of 73.10 ± 12.08%, and the fresh leaves showed higher inhibition (89.97 ± 0.31%). This is the first study to evaluate the influence of drying on the chemical composition and antioxidant activity of L. thymoides essential oils rich in thymol.
“…Considering the storage structures found in different organs and the volatile constituents of the aromatic plants, the selection of the appropriate drying methods is important because drying can affect the yield and the chemical composition of the essential oil [35,48]. We did not find previous studies evaluating the effect of different drying conditions on the yield of essential oil of L. thymoides, however, Ebadi et al (2015) [49] investigated the drying of Lippia citriodora leaves using different methodologies including oven-drying (40, 50, and 60 • C), and they found that the increase in temperature generated damage to glandular trichomes, which may have favored the loss of volatiles and the reduction in the yield [49].…”
Section: Drying Effects On Essential Oil Yieldmentioning
confidence: 99%
“…However, drying can cause changes in the yield of essential oils, polyphenols, pigments, and vitamin contents as well as appearance, taste, and color [32]. Different drying techniques have been applied to various aromatic plants to evaluate the effect of drying on the color, composition, and yield of the essential oils as well as to determine the best method for drying a specific plant [33][34][35][36][37].…”
Leaves of Lippia thymoides (Verbenaceae) were dried in an oven at 40, 50 and 60 °C and the kinetic of drying and the influence of the drying process on the chemical composition, yield, and DPPH radical scavenging activity of the obtained essential oils were evaluated. The composition of the essential oils was determined with gas chromatography-mass spectrometry and gas chromatography-flame ionization detection analyses. The influence of drying on the chemical composition of the essential oils of L. thymoides was evaluated by multivariate analysis, and their antioxidant activity was investigated via the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay. The Midilli model was the most appropriate to describe the behavior of drying kinetic data of L. thymoides leaves. Thymol was the major compound for all analyzed conditions; the maximum content was obtained from fresh leaves (62.78 ± 0.63%). The essential oils showed DPPH radical scavenging activity with an average of 73.10 ± 12.08%, and the fresh leaves showed higher inhibition (89.97 ± 0.31%). This is the first study to evaluate the influence of drying on the chemical composition and antioxidant activity of L. thymoides essential oils rich in thymol.
“…A species rich in essential oils is patchouli (Pogostemon cablin), an aromatic plant belonging to the Lamiaceae family whose oil extracted from its leaves is widely used as an important raw material in the manufacture of soaps, incense, cosmetics, and oral hygiene products. This oil is known for its antibacterial, insecticidal, antioxidant, repellent, and anti-adherent activities [18]- [20].…”
Nosocomial pneumonia, an infection of the lung parenchyma caused by bacterial species, corresponds to a morbidity responsible for reducing the quality of life and further compromising the hospitalized patient. Among the bacteria that cause this infection is Staphylococcus aureus, which has proved resistant to the drugs used in its treatment. Therefore, the need for new studies is urgent and phytotherapy has been gaining space. The objective of this research was to evaluate the anti-adherent activity of Pogostemon cablin essential oil against a strain of Staphylococcus aureus. To obtain the Minimum Inhibitory Adherence Concentration (MIC), Muller Hinton broth with 5% sucrose was used, the Sa 101 strain of the bacterial species under study, as well as, the positive control with 0.12% chlorhexidine. The material was incubated at 37 °C for 24 hours for reading using fuchsin. Through analysis, it was found that the oil studied was able to inhibit the adhesion of bacteria to the wall of the tube at a concentration of 1:2, showing positive activity against the formation of biofilm by Staphylococcus aureus, although the result found is lower than that of chlorhexidine, which inhibited at a ratio of 1:8. It is concluded that Pogostemon cablin oil showed anti-adherent activity against the strain under study, however, inferior when compared to the positive control.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.