Biodegradable films based on starch modified with ascorbic acid or caffeine and dialdehyde (DS) were evaluated towards their applications in the food packaging industry. The morphology of surface was observed SEM AFM. chemical structure examined ATR-FTIR spectroscopy X-ray diffraction. mechanical, thermal barrier properties examined. cross-linking hydrophobic effect starch-based proven. Vitamin C addition prompts crystalline formation improves hydrophilicity antioxidant activity blends....

Inorganic aluminum or iron salts supported with synthetic polymers are commonly used to eradicate colloidal particles from water in coagulation and flocculation processes. Nevertheless, these agents have several disadvantages, such as large volumes of sludge produced environmental toxicity. Recently biodegradable been suggested eco-friendly flocculants for treatment. This study aimed investigate the possibilities using starch chitosan their oxidized derivatives filter backwash Dialdehyde...

Prolonged drought stress may have a significant impact on the structure and activity of soil microbial community. Our study aims to investigate short-term (2 months) community structure, enzymes, metabolic diversity in four agricultural soils (Gniewkowo (G), Lulkowo (L), Wielka Nieszawka (N) Suchatówka (S) sites) Poland. These types were selected based differences their texture (gleyic luvisol Phaeozem G (rich clay humus), stagnic L, fluvisol N haplic S (sandy)). We investigated (1) number...

The excessive presence of single-use plastics is rapidly degrading our natural environment on a global scale due to their inherent resistance decomposition. Wet wipes used for personal or household purposes contribute significantly the accumulation plastic waste. One potential solution address this problem involves developing eco-friendly materials that possess ability degrade naturally while retaining washing capabilities. For purpose, beads from sodium alginate, gellan gum, and mixture...

This paper presents the results of study on production protease by Bacillus luteus H11 isolated from an alkaline soda lime. B. was identified as alkalohalophilic bacterium, and its extracellular serine endoprotease also showed extreme alkali- halotolerance. It remarkably stable in presence NaCl up to 5 M. The enzyme active a broad range pH values temperatures, with optimum 10.5 temperature 45 °C. had molecular mass about 37 kDa activity against azocasein synthetic substrate for...

The present research was aimed at assessing the quality of air and soil on premises in vicinity municipal landfill sites Toruń with regard to presence pathogenic bacteria, potentially dangerous humans. Air samples (the impaction method using a MAS-100 impactor) were collected from seven sampling including operating closed cells, located near leachate ponds, outside above premises. also involved microbial contamination three indoor spaces sites. Microbial tests determination number culturable...

The present research was aimed at assessing the quality of air in work environment municipal landfill site Toruń. Air samples were collected outdoor space (operating cell, technological square), and indoor (sorting station, weighing social room) using impaction method. microbiological testing included determining number airborne mesophilic bacteria molds. Bacterial strains identified with appropriate API tests; molds according to their macro micro characteristics. In air, highest average...

The study was aimed at determining whether potentially pathogenic free-living amoebae (FLA) and

This study evaluates the changes in bacterial and archaeal community structure during gradual evaporation of water from brine (extracted subsurface Jurassic deposits) system graduation towers located Ciechocinek spa, Poland. The communities were assessed with 16S rRNA gene sequencing (MiSeq, Illumina) microscopic methods. microbial cell density determined by direct count was at order magnitude 107 cells/mL. It found that increasing salt concentration positively correlated both counts,...

Experiments were conducted to investigate the antifungal activities of polyhexamethyleneguanidine (PHMG) derivatives introduced into polylactide (PLA), polyhydroxybutyrate (PHB) and polycaprolactone (PCL) against Aspergillus niger, Penicillium chrysogenum Candida albicans. All PHMG inhibited germination A. niger P. chrysogenum. exerted a much stronger inhibitory effect on cells C. granular polyethylene wax (at concentration 1.0%) has fungicidal effect. The reduction in number yeast capable...

This study was aimed at determining whether Legionella pneumophila can be found in lakes serving as a natural cooling system of power plant. Water samples were collected from five forming the plants Pątnów and Konin (Poland). The numbers bacteria belonging to different phylogenetic groups (bacteria, sp. L. pneumophila) determined with use molecular FISH method. results present show that thermally altered aquatic environments provide perfect conditions for growth pneumophila. These...

Abstract Three homopolymers containing hydantoin substituents were obtained by chemical modification of reactive p -chloromethylated polystyrene. The prepared polymers chlorinated to yield N -halamine materials with biocidal properties. structure was characterized Fourier transform infrared spectroscopy and nuclear magnetic resonance spectroscopy. All the are insoluble in water common organic solvents. Microbiological investigations prove high activity polystyrene derivatives spirohydantoin...

The research was aimed at assessing changes in the number of bacteria and evaluating biofilm formation groundwater collected from public wells, both aspects directly related to methods household storage. In research, water Cretaceous aquifer wells Toruń (Poland) stored a refrigerator room temperature. Microbiological parameters were measured immediately after collection, then 3 7 days storage under specified conditions. microbiological examination involved determining heterotrophic capable...