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This article is an overview of literature addressing edible fi lms and substances introduced to fi lms in order to impart them the antimicrobial activity. It describes natural polymers applied for the production of food packages and active substances of natural origin added to them, including: bacteriocins, enzymes, oils, and plant extracts. Further discussion refers to chitosan – a polysaccharide...
This study analysed the level of knowledge of regional dishes among the residents and restaurant owners in Kujawy. This objective was realized through questionnaire surveys conducted from October till December 2010. Two questionnaires were used, with closed alternative and open-ended questions covering the concepts of traditional and regional products, the availability and range of these products...
Insectivorous birds have very diversified diet, but particular species usually show some specialisation, which leads to a varying level of dependence on special prey. Their reproductive cycles are dependent on the availability of appropriate arthropods; in the case of Blue Tits Cyanistes caeruleus and Great Tits Parus major reproduction is usually coordinated with the availability of caterpillars...
Hole-nesting passerines constitute a 'model' group for which importance of synchronisation between food availability — mainly caterpillars — and appearance of nestlings is commonly postulated. Is there an adequate set of data allowing one to prove this relationship? The recent climate change could lead to a mis-match between food peaks and nestlings' appearance. Do the data exist that show that the...
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