Aleksandra Burkowska-But

Aleksandra Burkowska-But
Nicolaus Copernicus University | umk · Department of Envirnomental Microbiology and Biotechnology

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About

43
Publications
6,900
Reads
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566
Citations
Citations since 2016
19 Research Items
490 Citations
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2016201720182019202020212022020406080100
2016201720182019202020212022020406080100
2016201720182019202020212022020406080100

Publications

Publications (43)
Article
Full-text available
Maize ( Zea may s L.) is an economically important source of food and feed. This species is highly sensitive to drought, which is the most limiting factor for the biomass yield of a crop. Thus, maize cultivation methods should be improved, especially by environment-friendly agricultural practices, such as microorganisms. Here, we provide evidence t...
Article
Full-text available
A preparation development, which stimulates plant growth under normal and saline conditions, and protects against fungal infections, would increase crop yields and reduce damage in agriculture. This study was conducted using bacterial isolates from rape rhizosphere as a plant growth promoter and an alternative to chemical fertilizers. Three from fi...
Article
Background: The study aimed to develop a new formulation based on active substances of natural origin to protect plant seedlings against fungal pathogens and to evaluate its effect on fungal communities in arable soil. Results: p-CA showed the best antifungal activity. Coating seeds of common crop plants with p-CA-based preparation resulted in a...
Article
Full-text available
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 or environmental toxicity. Recently biodegradable polymers have been suggested as...
Article
Full-text available
Biodegradable films based on starch modified with ascorbic acid or caffeine and dialdehyde starch (DS) were evaluated towards their applications in the food packaging industry. The morphology of the films surface was observed with SEM and AFM. The chemical structure was examined with ATR-FTIR spectroscopy and X-ray diffraction. The mechanical, ther...
Preprint
Full-text available
Development of a preparation, which stimulates plant growth under normal and saline conditions, and protects against fungal infections, would increase crop yields and reduce damage in agriculture. This study was conducted using bacterial isolates from rape rhizosphere as a plant growth promoter and an alternative to chemical fertilizers. Three from...
Article
Biodegradable materials, namely pure polylactide (PLA), poly (3,4-hydroxybutyrate) (PHB), poly(ε-caprolactone) (PCL) were investigated to assess their degradability by activated sludge. The study aimed at the isolation of biofilm-forming bacteria and the determination of their hydrolytic activity toward the PLA, PHB, and PCL with embedded PHMG deri...
Article
The method of biocidal plastics preparation has been described. The two types of N-halamine additives have been mixed (0.5–2 wt%) with plasticized PVC and processed by dry-blend extrusion and injection molding. The biocidal efficacy of modified PVC has been tested against two strains of bacteria: Escherichia coli and Staphylococcus aureus; and agai...
Article
Full-text available
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 and Candida albicans. All of the PHMG derivatives inhibited the germination of A. niger and P....
Article
Several hydantoin derivatives and their N-halamine analogues were examined by spectroscopic methods (IR, ¹H-NMR, ¹³C-NMR), elemental analysis (content of C, H, N), thermogravimetry (TGA), antibacterial tests and experiments of stability in aqueous solution. This research allowed the structural, thermal and antibacterial characteristics of obtained...
Article
Full-text available
This paper presents the results of the study on the production of protease by Bacillus luteus H11 isolated from an alkaline soda lime. B. luteus H11 was identified as an alkalohalophilic bacterium, and its extracellular serine endoprotease also showed an extreme alkali- and halotolerance. It was remarkably stable in the presence of NaCl up to 5 M....
Article
Full-text available
This study evaluates the changes in bacterial and archaeal community structure during the gradual evaporation of water from the brine (extracted from subsurface Jurassic deposits) in the system of graduation towers located in Ciechocinek spa, Poland. The communities were assessed with 16S rRNA gene sequencing (MiSeq, Illumina) and microscopic metho...
Article
Full-text available
The study was aimed at assessing whether there is a risk of Legionella pneumophila in thermal pools used in balneotherapy and recreation. Water samples were collected from five thermal baths, supplied by thermal waters. The total number of bacteria was determined in the direct microscopic count under a fluorescence microscope. The numbers of bacter...
Article
This paper presents the results how the root system of the common osier (Salix viminalis L.) affects the activity of selected extracellular enzymes (esterase, phosphatase, α-glucosidase, β-glucosidase, and leucine-aminopeptidase) involved in the decomposition of organic matter in the constructed wetland, part of a wastewater treatment system. Soil...
Article
The research was aimed at assessing changes in the number of bacteria and evaluating biofilm formation in groundwater collected from public wells, both aspects directly related to the methods of household storage. In the research, water collected from Cretaceous aquifer wells in Toruń (Poland) was stored in a refrigerator and at room temperature. M...
Article
Preparation method of new biocidal plastics based on plasticized PVC has been elaborated. The derivative of poly(4-vinylbenzyl chloride) containing N-halamine substituents has been mixed with PVC granules and processed by dry blend extrusion and injection moulding. The properties of obtained material have been tested using SEM/EDX and thermogravime...
Article
The present research was aimed at assessing the quality of air in work environment of the municipal landfill site in Toruń. Air samples were collected in the outdoor space (operating landfill cell, technological square), and in indoor space (sorting station, weighing station, social room) using the impaction method. The microbiological air testing...
Article
Full-text available
The present study was aimed at investigating bactericidal properties of polylactide (PLA) films containing three different polyhexamethylene guanidine hydrochloride (PHMG) derivatives and effect of the derivatives on extracellular hydrolytic enzymes and intracellular dehydrogenases. All PHMG derivatives had a slightly stronger bactericidal effect o...
Article
Full-text available
The study was aimed at determining whether potentially pathogenic free-living amoebae (FLA) and Legionella pneumophila can be found in lakes serving as a natural cooling system of a power plant. Water samples were collected from five lakes forming the cooling system of the power plants Pątnów and Konin (Poland). The numbers of investigated organism...
Article
Objectives: The present study was aimed at evaluating microbiological contamination of air in Ciechocinek and Inowrocław - Polish lowland spa towns. Additionally, the impact of open-air inhalatoria on the quality of air was evaluated. Material and methods: Air samples were collected seasonally in the urban areas, in the recreation areas and in t...
Article
Physical, chemical and biochemical properties of silver nanoparticles (AgNPs) depend to a great extent on their size, shape, size distribution, and stabilizers located on their surface. This study focused on two typical stabilizers, namely citrates (cit), low molecular ions protecting nanoparticles by electrostatic repulsion, and polyvinylpyrrolido...
Article
Full-text available
Three homopolymers containing hydantoin substituents were obtained by chemical modification of reactive p-chloromethylated polystyrene. The prepared polymers were chlorinated to yield N-halamine materials with biocidal properties. The chemical structure of polymers was characterized by Fourier transform infrared spectroscopy and nuclear magnetic re...
Article
Full-text available
Objective: The aim of this study was determination of the level of water contamination in fountains in Toruń, Poland. Methods: The studies were conducted at monthly intervals from May - September 2009, and consisted in the determination of the number of heterotrophic bacteria capable of growing at a temperature of 22 and 37°C (PN-ISO 6222), as w...
Article
Full-text available
This study was aimed at determining whether Legionella pneumophila can be found in lakes serving as a natural cooling system of a power plant. Water samples were collected from five lakes forming the cooling system of the power plants Pątnów and Konin (Poland). The numbers of bacteria belonging to different phylogenetic groups (bacteria, Legionella...
Article
Chitinolytic strain Streptomyces albidoflavus was isolated from soil of the central region of Poland. Its identification was based on analysis of 16S rRNA gene sequence. The colloidal chitin was revealed as the finest substrate for the production of chitinases by S. albidoflavus. The enzyme catalyzed the hydrolysis of the disaccharide 4�methylumbel...
Article
Full-text available
This paper provides a review of the latest research findings on the applications of microbial chitinases to biological control. Microorganisms producing these enzymes can inhibit the growth of many fungal diseases that pose a serious threat to global crop production. Currently, efforts are being made to discover producers of chitinolytic enzymes. T...
Article
Full-text available
Prokaryotes from different phylogenetic groups were studied in surface microlayer (SM, up to 100 |im) and subsurface water (SW - 20 cm) in a eutrophic lake over three months (July, August, and October). The abundance of prokaryotes was determined by epifluorescence microscopy after DAPI staining, and phylogenetic diversity was determined by fluores...
Article
The research objective was to determine the activity of microorganisms in the soil exposed to direct influence of a landfill, as well as in the soil beyond its influence. Fluorescein diacetate (FDA) hydrolytic activity and respiration in the soil were determined. The highest number of cultivated bacteria was recorded at the site located within the...
Article
The present study was aimed at evaluating the number of bacteria and mould fungi in the indoor and outdoor environment of Toruń University Library. The sampling sites were located in the rooms serving the functions typical of libraries (i.e. in the Main Reading Room, Current Periodicals Reading Room, Collections Conservation Laboratory, Old Prints...
Article
The present study was aimed at determining the relationship between the operation of municipal landfills and the fluctuations of bacterial indicators of the sanitary quality of soil. Soil samples were collected at monthly intervals from May 2010 to April 2011 at ten sampling sites located on the premises and in vicinity of the reclaimed Municipal L...
Article
The aim of the present study was to determine microbiological air quality in the Ciechocinek health resort and to identify the most common mesophilic bacteria present in the air. Sampling sites were located in the surroundings of inhalators (graduation towers and the "Grzyb" fountain), in recreation areas (promenade, parks), and urban areas. Sample...
Article
The research objective was to determine the activity of microorganisms in the soil exposed to direct influence of a landfill, as well as in the soil beyond its influence. Fluorescein diacetate (FDA) hydrofytic activity and respiration in the soil were determined. The highest number of cultivated bacteria was recorded at the site located within the...
Article
Full-text available
Our study attempts to determine the influence of bacterial reduction on sulphate concentrations in groundwaters. A buried valley in a southeastern section of the Gwda River drainage basin was selected for fieldwork near the towns of Wysoka and Badecz. Deep aquifers in the area are known for their high sulphate concentrations that result from pyrite...
Article
Full-text available
The range of solar radiation reaching the air-water inter-phase, medium wave UV radiation, i.e. UVB 290–320 nm and UVA 320–400 nm, is of the highest biological impor-tance due to its harmful effects. Radiation within this range causes DNA damage (lethal effect) or limits the growth of organisms by inhibiting en-zyme synthesis, reducing active trans...

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Projects

Project (1)
Project
Design, synthesis and characterization of materials properties based on biopolymers with the addition of natural compounds with antimicrobial properties.