Diarylheptanoid-rich extract of grey and black alder barks: an effective dietary antioxidant in mayonnaise |
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Authors: | Maris Lauberts Galina Telysheva Petras Rimantas Venskutonis Liga Lauberte Tatiana Dizhbite Rita Kazernavičiūte Audrius Pukalskas |
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Affiliation: | 1.Latvian State Institute of Wood Chemistry,Riga,Latvia;2.Department of Food Science and Technology,Kaunas University of Technology,Kaunas,Lithuania |
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Abstract: | Diarylheptanoid-rich extracts (DAHEs) isolated from grey and black alder bark with pressurized ethyl acetate were tested in mayonnaise as a dietary antioxidant using the Oxipres method. DAHE contains >700 mg g?1 of oregonin possessing quite similar structure to the well-known dietary antioxidant curcumin, which is widely used as a bioactive constituent of food supplements. Strong radical scavenging capacity of oregonin was clearly demonstrated by the online HPLC–DPPH? scavenging assay. The antioxidative effect of DAHEs in mayonnaise was dose dependent; however, even the lowest concentration (0.5 mg g?1) of DAHE additive increased the induction period of oxidation more than two times. Consequently, DAHE may be considered as a promising natural antioxidant for commercial applications. |
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