Bioactive Compounds and Antioxidant Capacity of Strawberry Jams |
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Authors: | Marcia Da Silva Pinto Franco Maria Lajolo Maria Ines Genovese |
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Institution: | 1.Laboratório de Química, Bioquímica e Biologia Molecular de Alimentos, Departamento de Alimentos e Nutri??o Experimental,Universidade de S?o Paulo,S?o Paulo,Brazil |
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Abstract: | Strawberries represent the main source of ellagic acid derivatives in the Brazilian diet. They are also good sources of flavonoids,
mainly anthocyanins, and phenolic acids, to which many beneficial effects have been attributed. However, as the fruit is not
available all the year, the objective of this work was to determine whether the jams could also represent a good source of
bioactive compounds. In the current study, five different commercially available strawberry jams were characterized in relation
to flavonoids, total phenolics, free and total ellagic acid contents, and antioxidant capacity. Anthocyanins were detected
only in two jams at very low content. Kaempferol glycosides were the main flavonoids present (from 0.38 to 1.05 mg/100 g fresh
weight, FW), while quercetin glycosides were present in the range 0.14–1.20 mg/100 g FW. Free and total ellagic acid content
ranged from 0.4 to 2.9 mg/100 g FW, and from 17.0 to 29.5 mg/100 g FW, respectively. Total phenolics varied from 58 to 136 mg/100 g
FW, and the antioxidant capacity from 0.55 to 0.76 μmol BHT (Butylhydroxytoluene) equivalents/g FW. Overall, results indicated
that jams can also represent a good source of antioxidant compounds, although compared to the fruit important losses seem
to occur. |
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Keywords: | Antioxidant capacity Ellagic acid Ellagitannins Flavonoids Strawberry jams |
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