FOOD. Science. Technology. Quality

Food. SCIENCE. Technology. Quality

Food. Science. TECHNOLOGY. Quality

Food. Science. Technology. QUALITY

Authors

ANNA BANAŚ, ANNA KORUS

Title

Influence of plant-derived raw materials on the antioxidant properties of low-sugar cherry jams

Abstract

Fruits are a good source of bioactive compounds exhibiting pro-health properties. The objective of the study was to evaluate the effect of adding chokeberry, elderberry, Japanese quince, flax seeds and wheat germs on the antioxidant properties of low-sugar cherry jams stored at refrigeration (10 ºC) or room temperature (20 ºC) for 12 months. The highest levels of total polyphenols (3.036 g/kg), total flavonoids (1.372 g/kg) and total anthocyanins (0.902 g/kg) were recorded in the cherry jam with 15 % chokeberry fruit added, immediately after its production. In the cherry jams studied, the following polyphenols were identified: p-cumaric acid, ferulic acid, caffeic acid, rutin and (+)- catechin. In the jam without plant ingredients the dominant polyphenols were (+)-catechin (0.023 g/kg) and caffeic acid (0.019 g/kg). The content of vitamin C was the highest (0.085 g/kg) in the jam with Japanese quince added. The level of antioxidant activity (ABTS·+, DPPH· and FRAP) was the highest in the cherry jam with 15 % added chokeberry fruit. Both the longer time of storage and higher storage temperature resulted in a decrease in the value of all the parameters analyzed. Enriching cherry jams with pro-health ingredients improved the quality of the final product. These products are a valuable source of antioxidants in daily diet.

Keywords

cherry fruit, jam, pro-health additives, antioxidants, polyphenols, storage

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