Data/hora: 07/06/2024 15:23:19

Biblioteca(s): 	Embrapa Semiárido.	
Data corrente: 	26/02/2015	
Data da última atualização: 	26/02/2015	
Autoria: 	ALMEIDA, J. R. G. da S.; SOUZA, A. V. de; SANTOS, U. S. dos; SOUZA, M. D. de; BISPO, L. dos P.; TURATTI, Z. C. C.; LOPES, N. P.	
Afiliação: 	JACKSON ROBERTO GUEDES DA SILVA ALMEIIDA, UNIVASF; ANA VALERIA VIEIRA DE SOUZA, CPATSA; UILIANE SOARES DOS SANTOS; MAZIELE DIAS DE SOUZA; LUMA DOS PASSOS BISPO; IZABEL CRISTINA CASANOVA TURATTF, USP; NORBERTO PEPORINE LOPES.	
Título: 	Chemical composition of essential oils from Croton conduplicatus (Euphorbiaceae) in two different seasons.	
Ano de publicação: 	2014	
Fonte/Imprenta: 	Journal of Essential Oil Bearing Plants, v. 17, n. 6, p. 1137-1145, 2014.	
DOI: 	10.1080/0972060X.2014.931254	
Idioma: 	Inglês	
Conteúdo: 	Croton conduplicatus is a species popularly known in the Brazilian Caatinga (Semi-Arid vegetation) as quebra faca. Essential oils from the fresh lea ves were obtained by hydrodistillation in two different seasons (dry and rainy seasons) after 2, 3 and 4 hour s of extraction. Analyses were made by GC-MS. The main compounds found in the oil of leaves collected in the dry season were 1,8-cineole, p-cymene, spathulenol and caryophyllene oxide. For the essential oil coll ected in rainy season the major constituents identified were 1,8-cineole, -phellandrene, bicyclogermacrene, (E)-caryophyllene and spathulenol. The antioxidant potential was evaluated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2-azinobis-3- ethylbenzothiazoline-6-sulfonic acid (ABTS) scavengers methods, as well as the method of co-oxidation of -carotene/linoleic acid. A significant inhibitory effect of essential oils on ABTS free radicals was detected. C. conduplicatus is a natural source of antioxidants. The essential oils from the leaves contain constituents with antioxidative properties and could serve as inhibitors or scave ngers of free radicals	
Palavras-Chave: 	Atividade antioxidante; Bioma; Constituintes voláteis; Croton conduplicatus; Planta nativa; Quebra faca.	
Thesagro: 	Caatinga; Composição Química; Óleo essencial; Planta medicinal.	
Thesaurus Nal: 	Essential oils.	
Categoria do assunto: 	P Recursos Naturais, Ciências Ambientais e da Terra	
Registro original: 	Embrapa Semiárido (CPATSA)	
Exemplares: 	CPATSA - (54406-1) - UPC - AP - DD -  -  -  - DIS