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Antioxidant capacity and total phenolic content of pressurized extracts of natural sources

AuthorsMiron, T. L.; Castro-Puyana, M. ; Herrero, Miguel ; Ibáñez, Elena
Free radicals
Pressurized liquid extraction
Issue Date2012
CitationFLUCOMP 2012
AbstractNowadays, the concept of chemical preservatives in food is very controversial. Synthetic antioxidants such as butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT) are commonly used in the food industry due their effectiveness and low price. Nevertheless, the toxicity of these compounds drew attention to their side effects on the human body and possible carcinogenic properties. Modern consumer options have been redirected to natural alternatives, healthier and more diversified in terms of chemical composition and functional properties. Therefore, in the last years an increased interest to obtain natural bioactive compounds that can be used in the food industry has been observed. Besides, these components may be also useful for the development of functional foods that can provide additional physiological benefits, other than energy and nutrition. Pressurized liquid extraction (PLE) is applied for extraction of natural compounds from two raw materials from Romania: ramson (Allium ursinum), plums (Prunus domestica) and a raw material from Spain: lemon balm (Melissa officinalis). The antioxidant activities of the extracts were determined by using DPPH (1,1- diphenyl-2-picrylhydrazyl) radical scavenging and trolox equivalent antioxidant capacity (TEAC) in-vitro assays. The content of total phenolics in the extracts was determined spectrometrically according to the Folin-Ciocalteu procedure and calculated as gallic acid equivalents. The results support the possibility that these raw materials, which are commonly used in the Romanian and Spanish diet, can contribute to protective effects on human health. However, in vivo experiments and the absorption and metabolism of plants' bioactives are still necessary to further shed light on their efficacy in disease risk reduction.
DescriptionResumen del póster presentado a la VI Reunión de Expertos en Tecnologías de Fluidos Comprimidos celebrada en Madrid del 28 al 29 de junio de 2012.
Appears in Collections:(CIAL) Comunicaciones congresos
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