Interspecific hybridization of oil palms (E. guineensis × E. oleifera) was initially exploited to provide disease resistance and, consequently, increased oleic acid content. Besides the growing importance of this cultivar to the market, there is little information about this oil’s properties. In this context, this study aimed to determine a comprehensive physicochemical and thermal characterization of hybrid palm oil (HOPO) compared with the better-known African palm oil (APO). Differences in the distribution of fatty acids, carotenoids, and tocols were observed. Minor differences in density and viscosity were found between the oils, with no relevance for the materials’ processing design. Nevertheless, HOPO showed unique crystallization behavior, which potentially can affect industrial operations, such as fractionation. HOPO did not present the two thermal characteristic regions of APO, attributed to olein and stearin fractions. The HOPO demonstrated a decrease in the melting point of more than 3 °C in relation to APO, and a reduction in the crystallization point of more than 6 °C. Furthermore, besides the higher content of unsaturated fatty acids, HOPO was more stable than APO due to a higher antioxidant content. These results could be useful to establish operation conditions for processes using palm oil from hybrid oil palm.
Rice bran oil is a highly nutritious vegetable oil, as it is rich in tocols and γ-oryzanol. Degumming is the first step in the vegetable oil refining process, and its main objective is the removal of phospholipids or gums. In the present study, enzymatic degumming trials were performed on crude rice bran oil using the phospholipases PLA1, Purifine® PLC, their mixture (PLA1/PLC), and a cocktail known as Purifine® 3G. Enzymatic degumming applying 50 mg/kg of PLA1 for 120 min resulted in a residual phosphorus content of 10.4 mg/kg and an absolute free fatty acid increase of 0.30%. Enzymatic degumming applying 300 mg/kg of Purifine® PLC for 120 min at 60 °C resulted in a residual phosphorus content of 67 mg/kg and an absolute diacylglycerol increase of 0.41%. The mixture of phospholipases and the cocktail presented approximately 5 mg/kg of residual phosphorus content after the reaction times. For all degumming processes, the preservation of minor components such as tocols and γ-oryzanol were observed. These results indicate that the use of enzyme mixtures or their cocktails to attain low phosphorus content and high diacylglycerol/free fatty acid conversion during enzymatic degumming is a viable alternative.
O objetivo deste trabalho foi adicionar a polpa de tomate encapsulada por gelificação iônica com 2% (P2) e 5% (P5) de alginato de sódio ao azeite de oliva extra virgem e avaliar a estabilidade deste produto durante 60 dias de armazenamento. Foram realizadas as análises de pH, cor, acidez, microbiológica e aplicado o teste sensorial de aceitação do produto após 60 dias de armazenamento. As formulações analisadas mantiveram-se estáveis durante o tempo de armazenamento, mantendo sem diferença significativa a cor do produto. Quanto as análises de coliformes totais, foi verificado ausência em todas as formulações e para bolores e leveduras os resultados obtidos estavam dentro do exigido pela legislação. Não houve diferença significativa entre as duas formulações quando realizado o teste de sensorial de aceitação. A junção do licopeno do tomate com o azeite de oliva extra virgem forma um produto com um alto poder nutricional contribuindo na prevenção de doenças coronárias e câncer.
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