Total content of phenols, anthocyanins and tannins in sour cherry fruit and press cake | Kopējais fenolu, antocianīnu un tanīnu saturs skābo ķiršu augļos un spiedpaliekās
2015
Seglina, D., Latvian State Inst. of Fruit-Growing, Dobele (Latvia) | Krasnova, I., Latvian State Inst. of Fruit-Growing, Dobele (Latvia | Olsteine, A., Latvian State Inst. of Fruit-Growing, Dobele (Latvia | Feldmane, D., Latvian State Inst. of Fruit-Growing, Dobele (Latvia
Sour cherries are important fruit crop worldwide and in Eastern Europe especially. The climate is suitable for cherry growing in Latvia. The productivity of sour cherries has been improved by introducing of new cultivars. Sour cherry fruit have high nutritive value and multiform application. Recently the investigations of raw materials of plant origin became topical due to their high-quality composition. The aim of the research was to determine the content of the polyphenol compounds in sour cherry fruit and in a press cake after juice pressing. The cultivars which are widely grown in Latvia or suitable for Latvian conditions were chosen for the research: ‘Latvijas Zemais’, ‘Zentenes’, ‘Bulatnikovskaya’, ‘Orlica’, ‘Zhukovskaya’, ‘Shokoladnica’ and ‘Tamaris’. The objects of the research were frozen fruit and the press cake after juice pressing. The total content of the phenols, anthocyanins and tannins were determined spectrophotometrically. The results of the research showed that sour cherry cultivars grown in Latvia were rich in polyphenol compounds. The content and composition of polyphenol compounds varied among cultivars significantly. In frozen fruit the highest total content of phenols, anthocyanins and tannins was detected in ‘Shokoladnica’ and ‘Tamaris’. The highest total content of phenols and tannins in the press cake after juice production was detected in ‘Shokoladnica’ and ‘Zhukovskaya’, and four cultivars showed high total content of anthocyanins.
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