Acta Scientiarum Polonorum

Scientific paper founded in 2001 year by Polish agricultural universities

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Technologia Alimentaria
(Technologia Żywności i Żywienia) 6 (1) 2007
Title
AN ATTEMPT TO APPLY A PULLULAN AND PULLULAN-PROTEIN COATINGS TO PROLONG APPLES SHELF-LIFE STABILITY
Autor
Anna Chlebowska-Śmigiel, Małgorzata Gniewosz, Ewa Świńczak
Keywords
pullulan, edible coating, apples shelf-life
Abstract
The aim of the research was to study the influence of the pullulan and pullulan- -protein edible coatings on the reduction of the apples mass loss during the storage. The research was carried out on pullulan received from A. pullulans white mutant B-1 in a batch cultivation process and the ‘Malinova’ and ‘Champion’ apples. In the first stage of the research the apples were covered with 15% and 20% pullulan water solution and storage at 4°C and 22°C during 39 days. In the second stage of the research the apples were covered with pullulan-protein coating obtained from the mixture of pullulan and soy protein. Apples covered with the pullulan-protein coatings were stored at the temperature of 2°C during 10 weeks. Mass losses of apples, durability of the pullulan and pullulan-protein coatings as well as changes in the appearance of the surface coating covered fruit in comparison with the one uncovered were evaluated. Pullulan edible coating significantly limited apples mass losses. Apples covered with coatings showed lower mass losses than the ones uncovered. The smallest mass losses were observed in apples covered with the coatings where the pullulan to protein ratios were: 6:4 and 5:5. It was observed that by adding protein to pullulan the coating stuck better to apples surface. During the storage process the protein-containing layer was less susceptible to crumbling and to peeling off.
Pages
49-56
Cite
Chlebowska-Śmigiel, A., Gniewosz, M., Świńczak, E. (2007). AN ATTEMPT TO APPLY A PULLULAN AND PULLULAN-PROTEIN COATINGS TO PROLONG APPLES SHELF-LIFE STABILITY. Acta Sci. Pol. Technol. Aliment., 6(1), 49-56.
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