Wigry Lake has one of the longest zooplankton data sets in Poland and has been investigated for over 100 years. Therefore, our goal was to present long-term changes in zooplankton structures against the background of changing trophic conditions. The species composition of crustacean zooplankton in the first half of the 20ᵗʰ century was typical for a large mesotrophic lake, with a high share of Oaphnia cucullata and stenotherm species: Eurytemora lacustris, Heterocope appendiculata, Cyclops la...

The study aimed to analyze hydrochemical and bacteriological features in selected springs of the Gryżynski Landscape Park (GLP) in western Poland. The basic hydrochemical parameters and the abundance and biomass of bacteria were analyzed in water samples collected from 22 springs in GLP in July 2018. The hydrochemical composition of the GLP spring waters depends mainly on the specific geological structure and character of catchment land use. The research showed Significant differences in the ...

A bacteriological study was conducted in late summer (early September 2018) in the deepest postglacial reservoir in the central lowland depression - Lake Hańcza (northeastern Poland). The aim of the study was to determine the spatial variation in the density of planktonic bacteria, the level of their hydrolytic activity and the ratio of live to dead bacterial cells. During the fieldwork 92 water samples were collected from thirteen stratified sites located in different parts of the lake. The ...

The study of the genesis of domestic animals in zoogeographic, phylogenetic and cytogenetic aspects allowed us to identify patterns of occurrence and development of various diseases and to predict their dynamics in connection with changes in the complex conditions of their habitat. It was found that among the examined group of dogs in 80,3% of cases there were benign neoplasms; in 19,7% of cases the possibility of the occurrence and development of malignant neoplasms was diagnosed. Malignant ...

Cyanobacteria are a very expansive group of microorganisms, showing a number of adaptations, allowing them to live in various environmental conditions. Cyanobacteria are characterized by massive growth which manifests itself as water blooms. Blooms are stimulated by environmental factors, including high concentration of biogenic compounds, high water temperature. Blooming is a major threat because it has many negative consequences, including disturbance of the entire ecosystem and the product...

The phenomenon of bacterial opportunism has been known for two centuries. It means the occurrence of species that generally remain completely harmless, but in conditions unfavorable for the host may lead to the development of disease symptoms. Until now, opportunistic pathogens have often been marginalized and the number of infections caused by them has been underestimated. In recent years, however, the importance of opportunistic human pathogens in the general pool of bacterial and fungal in...

Vanadium is considered a strategic metal, and its limited resources and high consumption make its production and recovery of significant importance. The Dowex PSR2's and Dowex PSR3's applicability for vanadium removal from aqueous solutions was examined. The adsorption process optimization was performed for the adsorbent dose (0.01 - 0.1 g) and pH (2 - 10) effects. It was found that the optimum adsorbent dose is equal to 0.1 g and optimum pH = 6. V(V) can be removed with high efficiency (the ...

Cheap and simple, an all solid state lead ion selective electrode for lead determination is described. The PVC electrode membrane was modified by addition of multiwalled carbon nanotubes and ionic liquid 1-hexyl-3-methylimidazolium hexafluorophosphate. The electrode with a modified membrane was characterized by a lower detection limit and better selectivity in relation to sodium, potassium, and calcium ions than an electrode having membrane with a classic composition. It also exhibited good p...

The purpose of this work is a theoretical and practical justification for the creation of effective compositions of highly purified free amino acids and specialized mini-aminosols for metabolic therapy of malignant growth. On the basis of the experimental data we suggest that the differences discovered in certain amino acids concentrations in blood plasma, red blood cells, and tumors are criteria in early diagnostics of primary cancerous growth as well as in estimation of the efficacy of spec...

Rare earth elements are used in many high-tech applications but their rarity and availability require the development of methods for their recovery from low-quality sources and recycling from waste materials. Sorption processes, including biosorbents, are an interesting method for their recovery from dilute solutions. This work investigates the sorption of lanthanum(III) ions using cheap, renewable biosorbents: calcium alginate and biochar (considered as reference materials) and an alginateba...

For removal of C.I. Acid Red 18 (cochineal red A, ponceau 4R) from aqueous solutions, polystyrene Amberlyst A 21 and Lewatit VPOC 1064 were used. C.I. Acid Red 18 sorption was performed using static and dynamic methods. The parameters of the Freundlich and Langmuir isotherm models were calculated. The sorption rate constants were determined based on the pseudo-first-order, pseudo-second order and intraparticle diffusion models. The working and total exchange capacities, and bed and weight dis...

The article estimates the need to implement a strategy of sustainable development. It says that it is possible to achieve the premises of sustainable consumption by stimulating demand for products manufactured with the use of energy-efficient technologies, non-toxic materials, etc. The article also outlines the urgency of the problem of waste accumulation in Ukraine. The necessity of solving the problem of solid household waste management is determined. The quality of household waste manageme...

Warm stratification stimulates apple (Malus domestica Borkh.) seeds' ageing. In our work, warm stratification was used as a treatment leading to the controlled seeds' deterioration. We examined the levels of biotin-containing proteins (indicators of seeds' viability) and ubiquitin-marked proteins in the embryonic axes of aged seeds. Alterations in the level of biotin-containing proteins depended on the duration of warm stratification. No change in the content of ubiquitinated proteins was obs...