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| García,Matías; Sosa,Marta E.; Donadel,Osvaldo J.; Giordano,Oscar S.; Tonn,Carlos E.. |
| In order to evaluate the allelochemical activity of some sesquiterpenes isolated from the native plant Tessaria absinthioides (Hook. et Arn.) DC, and some semi synthetic derivatives against Tenebrio molitor L. larvae, we have developed bioassays directed to quantify repellency, larval mortality, and its effects on the development. Although costic aldehyde caused the maximum repellent effect, all the compounds showed a significant effect at some dose or time, indicating behavioral avoidance. The topical application of costic aldehyde produced the largest increase on the duration of the pupal stage. Tessaric acid exhibited the highest toxicity by topical application at the experiment closure. Both eremophilane-1(10),2,11(13)-triene-12-oic, and <img... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Sesquiterpenes; Tenebrio molitor; Repellency; Development; Mortality. |
| Ano: 2003 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0373-56802003000200002 |
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| SANTOS,Alberdan S; ANDRADE,Eloisa H. A; ZOGHBI,Maria das Graças B; LUZ,Arnaldo I. R; MAIA,José G. S. |
| The essential oils from leaves and thin branches of Piper amapense, Piper ducket and Piper bartlingianum were analysed by GC/MS and all volatile compounds were identified as sesquiterpenes. The main constitutents identified in the oil of P. amapense were trans-caryophyllene (25.0%), caryophyllene oxide (17.0%) and β-selinene (15.0%). The oil of P. duckei was dominated by trans-caryophyllene (23.5%), caryophyllene oxide (18.4%), β-eudesmol (9.4%) and a-eudesmol (9.1%). The major components found in the oil of P. bartlingianum were <x-cadinol (11.2%), p-elemene (10.5%), ą-muurolol (9.4%), (E)-nerolidol (9.0%). |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Piper amapense; Piper duckei; Piper bartlingianum; Piperaceae; Essential oils; Sesquiterpenes. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671998000200127 |
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| TAVEIRA,FRANCISCA S. N.; ANDRADE,ELOISA H. A.; LIMA,WATERLOO N.; MAIA,JOSÉ G. S.. |
| The essential oils of the leaves and fine stems of Pilocarpus microphyllus, collected on iron mineralized soil of the Serra de Carajás, Southeast of Pará State, Brazil, during the rainy and dry seasons, were obtained by hydrodistillation and analyzed by GC-MS. The main identified compounds were 2-tridecanone, beta-caryophyllene, 2-pentadecanone, caryophyllene oxide and germacrene D. Their percentage contents varied with the season, the greater values having been detected mainly in the rainy season. For 2-tridecanone and beta-caryophyllene the higher values were observed in the fine stem oils for the former, and in the leaf oils for the latter. For 2-pentadecanone, caryophyllene oxide and germacrene D they were also in the leaf oils. In general, the leaf... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pilocarpus microphyllus; Rutaceae; Jaborandi; Essential oil composition; 2-tridecanone; 2-pentadecanone; Sesquiterpenes. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000100004 |
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| CARNEIRO,NÁRGELLA S.; ALVES,CASSIA C.F.; ALVES,JOSÉ M.; EGEA,MARIANA B.; MARTINS,CARLOS H.G.; SILVA,THAYNÁ S.; BRETANHA,LIZANDRA C.; BALLESTE,MAIRA P.; MICKE,GUSTAVO A.; SILVEIRA,EDUARDO V.; MIRANDA,MAYKER L.D.. |
| ABSTRACT Many essential oils (EOs) of different plant species possess interesting antimicrobial effects on buccal bacteria and antioxidant properties. Eugenia klotzschiana Berg (pêra-do-cerrado, in Portuguese) is a species of Myrtaceae with restricted distribution in the Cerrado. The essential oils were extracted through the hydrodistillation technique using a modified Clevenger apparatus (2 hours) and chemically characterized by GC-MS. The major compounds were α-copaene (10.6 %) found in oil from leaves in natura, β-bisabolene (17.4 %) in the essential oil from dry leaves and α-(E)-bergamotene (29.9 %) in oil from flowers. The antioxidant activity of essential oils showed similarities in both methods under analysis (DPPH and ABTS˙+) and the results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant activity; Antibacterial activity; Brazilian pear; Drying; Eugenia klotzschiana; Sesquiterpenes. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401907 |
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| Oliveira,Juliana Dantas de; Alves,Daniely Karen Matias; Miranda,Mayker Lazaro Dantas; Alves,José Milton; Xavier,Marcelo Nogueira; Cazal,Cristiane de Melo; Alves,Cassia Cristina Fernandes. |
| ABSTRACT: Campomanesia adamantium is a native fruit species of the Cerrado and is used in food and medicines and as bee pasture. The chemical composition of essential oils obtained from plants of the same species have varying constituent proportions due to the influence of extractive factors, environmental, genetic and ontogenetic. This study aimed to identify the influence of hydrodistillation time on the content and chemical composition of essential oil extracted from the leaves of C. adamantium . Treatments consisted of five extraction times (1, 2, 3, 4, and 5h) using Clevenger with five replications in a completely randomized design. It was observed that after two hours of hydrodistillation, the essential oil content remains constant. Regarding the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Essential oil; Hydrodistillation time; Sesquiterpenes. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000100751 |
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