INHIBITING EFFECT OF TANNIN IN CHOKEBERRY MUST ON THE WINEMAKING PROCESS

The method of high performance gel permeation chromatography (HPGPC) was used to determine molecular weights of polyphenols present in chokeberry wines. Three polyphenol fractions of the molecular weights 200, 600 and 994 Da were determined. In order to precipitate polyphenols, polyvinyl polypyrrolidone (0.2 and 0.8 g/L) and gelatin (0.2 and 0.4 g/L) were added to wines. The fermentation process of chokeberry must revealed faster completion in wines with the addition of gelatin and PVPP in contrary to wine with no additives. PVPP was shown to be more selective than gelatin in precipitating polyphenols of higher molecular weights above 600 Da, which strongly inhibit the fermentation process. In order to improve fermentation conditions, the addition of 0.8 g/L PVPP is recommended.

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eISSN:	2083-6007
ISSN:	1230-0322

W latach 2022-2024 kwartalnik naukowy Polish Journal of Food and Nutrition Sciences realizuje projekt nr RCN/SP/0520/2021/1 finansowany ze środków budżetu państwa – Ministerstwo Edukacji i Nauki w ramach programu „Rozwój czasopism naukowych”. Dofinansowanie wynosi 120 000 zł. W ramach projektu podejmowane są działania zmierzające do podniesienia poziomu praktyk wydawniczych i edytorskich, zwiększenia wpływu czasopism na rozwój nauki oraz utrzymania się czasopism w międzynarodowym obiegu naukowym.

In the years 2022-2024, the scientific quarterly Polish Journal of Food and Nutrition Sciences accomplishes a project no. RCN/SP/0520/2021/1 financed from the state budged – Ministry of Education and Science Republic of Poland in the framework of a program “Development of scientific journals”. The financing amounts to 120,000 PLN. The program aims at improving the level of publishing and editing practices, increasing the impact of scientific journals on science development, and extending the international range of scientific journals.