Sabria Aued-Pimentel

Bio: Sabria Aued-Pimentel is an academic researcher from Instituto Adolfo Lutz. The author has contributed to research in topics: Fatty acid & Polyunsaturated fatty acid. The author has an hindex of 13, co-authored 51 publications receiving 592 citations. Previous affiliations of Sabria Aued-Pimentel include Federal University of Piauí.

Composition of tocopherols in sesame seed oil: an indicative of adulteration

Abstract: The objective of this research was to verify how the composition of tocopherols can help to reveal adulteration in samples of sesame seed oils commercialized in Brazil. Five samples have been analyzed. One sample presented the composition of fatty acids, tocopherols and desmethylsterols of authentic sesame oil. Another one presented only non complying parameters. Three other samples showed the fatty acid composition of pure sesame oil, but the tocopherol and desmethylsterol profiles did not comply with those for sesame seed oil. The results indicate that samples could be adulterated by other vegetable oils like soybean, lauric and corn oils.

Determinação da diferença entre o valor real e o teórico do triglicerídeo ECN 42 para a detecção de adulteração em azeites de oliva comercializados no Brasil

Abstract: CALCULATION OF THE DIFFERENCE BETWEEN THE ACTUAL AND THEORETICAL ECN 42 TRIACYLGLYCERIDE CONTENT TO DETECT ADULTERATION IN OLIVE OIL SAMPLES COMMERCIALIZED IN BRAZIL. The difference between the actual ECN 42 triacylglyceride content in vegetable oils, obtained by HPLC analysis, and the theoretical value calculated from the fatty acid composition was applied to detect the addition of seed oils with high contents of linoleic acid to olive oils commercialized in Brazil. The results indicate that samples analyzed were probably adulterated with low commercial value seed oils, rich in linoleic acid, like soybean, sunflower or corn.

Caracterização química do óleo da amêndoa de Sterculia striata St. Hil. et Naud

Abstract: This paper describes total lipid content, unsaponifiable fraction and the acid, refractive, saponification and iodine indices of the oil of Sterculia striata nuts. The fatty acids, the sterols and the triterpene alcohols were determined. The percentage of cyclopropenoid fatty acids (CPFA), determined by NMR 1H (15,5%), makes the nuts of this species unsuitable for human consumption.

Tocopherols and Tocotrienols in Common and Emerging Dietary Sources: Occurrence, Applications, and Health Benefits

Abstract: Edible oils are the major natural dietary sources of tocopherols and tocotrienols, collectively known as tocols. Plant foods with low lipid content usually have negligible quantities of tocols. However, seeds and other plant food processing by-products may serve as alternative sources of edible oils with considerable contents of tocopherols and tocotrienols. Tocopherols are among the most important lipid-soluble antioxidants in food as well as in human and animal tissues. Tocopherols are found in lipid-rich regions of cells (e.g., mitochondrial membranes), fat depots, and lipoproteins such as low-density lipoprotein cholesterol. Their health benefits may also be explained by regulation of gene expression, signal transduction, and modulation of cell functions. Potential health benefits of tocols include prevention of certain types of cancer, heart disease, and other chronic ailments. Although deficiencies of tocopherol are uncommon, a continuous intake from common and novel dietary sources of tocopherols and tocotrienols is advantageous. Thus, this contribution will focus on the relevant literature on common and emerging edible oils as a source of tocols. Potential application and health effects as well as the impact of new cultivars as sources of edible oils and their processing discards are presented. Future trends and drawbacks are also briefly covered.