AN ATTEMPT TO APPLY A PULLULAN COATING TO REDUCE OXIDATIVE CHANGES AND MASS LOSS IN NUTS DURING STORAGE

Samples of peanuts, hazelnuts and walnuts were covered with a pullulan coating prepared from 10% anhydrous solution of pullulan. The pullulan was obtained from a batch culture of a white mutant of Aureobasidium pullulans B-1. Over 90 days of nuts storage at a room temperature, analyses were carried out for changes in the acid and peroxide numbers of fat extracted from the nuts, as well as for changes in nut mass loss. The pullulan coating applied was found to exert a positive impact on the reduction of physicochemical changes occurring in the stored nuts. It inhibited processes of hydrolytic rancidity and oxidation of fat of the nuts. It had especially beneficial effect on walnuts, in which it inhibited the negative changes in lipids over the entire storage period. It was also observed that mass losses of the coated nuts were smaller and occurred in substantially shorter time span as compared to the uncoated nuts.

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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.