Data/hora: 11/06/2024 10:19:45

Provedor de dados: | 64
País: | Brazil
Título: | Dipteryx lacunifera seed oil: characterization and thermal stability
Autores: | Queiroga Neto,Vicente; Bora,Pushkar Singh; Diniz,Zeomar Nitão; Cavalheiro,José Marcelino Oliveira; Queiroga,Karine Formiga.
Data: | 2009-12-01
Ano: | 2009
Palavras-chave: | Dipteryx lacunifera; Seed kernel oil; Physical-chemical properties; Fatty acids composition; Thermogravimetric analysis.
Resumo: | The Dipteryx lacunifera Ducke is an oleaginous legume with high oil and protein content that can be used in human nutrition. The specie is a native of the Piauí and Maranhão state in the north east of Brazil. The measure physico-chemical properties of the oil are specific density, refractive index, acid, peroxide, iodine and saponification values of 0.91, 1.4651, 0.60 (% oleic acid), 2.81, 70.80 and about 179, respectively. Gas chromatographic analysis of the oil showed the presence of 20.6% saturated, 65.1% monounsaturated and 14.3% polyunsaturated fatty acids. The saturated fatty acids C6:0, C8:0, C12:0 and C17:0 were present in trace (&lt;0.01%) amounts while the C16:0, C18:0, C20:0, C22:0 and C24:0 were at concentrations of 10.3, 5.4, 3.4, 0.9 and 0.6% of the total fatty acids. Unsaturated fatty acids C18:1, C18:2, C18:3 and C22:2 contents were 65.1, 14.1, 0.3% and trace (0.01%), respectively. Thermal analysis (TG/DTG) revealed that the thermal decomposition of the oil occurs in two steps corresponding to the unsaturated and saturated fatty acids. The oil, when heated to a temperature of 180º C for 400 min showed smaller loss in mass than commercial soy, sunflower and corn oils. The curve DSC indicated an endothermic event with enthalpy variation (DH) of -56.7 Cal.g-1 in the temperature interval of 340 ºC (Ti) the 463º C (Tf), with maximum in 411.1º C (Tm).
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542009000600020
Editor: | Editora da Universidade Federal de Lavras
Relação: | 10.1590/S1413-70542009000600020
Formato: | text/html
Fonte: | Ciência e Agrotecnologia  v.33 n.6 2009
Fonte: | info:eu-repo/semantics/openAccess