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EN
The concentration of anionic surface active substances (ASAS) in the water of Lake Jeziorak Mały and the degradation of these substances by bacteria isolated from the surface microlayer and subsurface water were the object of the research of this paper. The concentrations of ASAS in water of this lake were at the level of about 2 mg/1. The biodegradation of ASAS was performed twice as well by microorganisms from the surface microlayer than from subsurface water. Moreover, within the surface microlayer the process of decomposing ASAS was most effectively performed by bacteria isolated from the layers of water closest to the surface (100-150 μm).
PL
Wszystkie proponowane metody oznaczania flawonoidów i ich metabolitów z ekstraktów surowców roślinnych wpisują się w najnowsze tendencje bioanalityki.
EN
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 used for fi lm formation and characterised by strong antibacterial and antimycotic properties.
EN
The latest developed classes of synthetic insecticides – phthalic acid diamides and antranilic diamides, acting as ryanodine receptor modulators, are discussed. The mode of their activity, the insecticidal properties and characteristics of their representatives is reviewed.
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