Polish Journal of Natural Sciences
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The purpose of the study was showed the transport effect on cadmium, lead and arsenic content in soil. The research was carried out in Morąg city in the places with high traffic intensity near garden plots, agricultural areas, wasteland and birchen woodland and at different distance from the route, and near Skiertąg lake situated with a long way to roads. There were analyzed pH, granulometric composition...
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The aim of researches was to indicate effective ways of usage oils obtained from of seeds of nine national varieties of rapeseed: four pollinated and two hybrid of winter rape as well as three pollinated of spring rape. Fatty acid composition was determined by gas chromatography and it was the base to determine omega-6 to omega-3 ratio as well as calculate oxidizability index. The researches showed...
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The objective of this study was to determine production results, slaughter value and meat quality in growing-finishing pigs fed complete diets containing various grain species, supplemented with exogenous feed enzymes. The feeding trial was performed on 36 crossbred (Polish Large White x Polish Landrace) x Duroc pigs divided into six experimental groups fed the following complete grower and finisher...
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The aim of this study was to compare the breeding environmental conditions in the box stall stable and the horse-barn. Assessment of the breeding environment was performed on the basis of the stable area and the cubic capacity as well as on microclimate measurements over the autumn and winter period. The results of the study indicate that both the box stall stable and the horse-barn provided a proper...
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The experiment investigated the effect of Funaben T fungicide treatment on the yield, gas exchange parameters and health status of buckwheat seeds cv. Kora. The results indicate that the applied seed dressing fungicide contributed to an increase in buckwheat seed yield. Gas exchange parameters were similar in both experimental variants. Buckwheat seeds were colonized mostly by fungi of the species...
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The anatomical structure of gonads in coregonids is characteristic for teleost fishes with follicular, synchronous group tape-like ovaries and acinose type, lobulated testes. In some alpine lakes in Switzerland and in water bodies in northern Poland, certain disorders and changes in the macroscopic structure of whitefish Coregonus sp. gonads have been observed in the pre-spawning period. In males,...
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The effect of three increasing doses of meat-and-bone meal on the yield and macronutrient content of perennial ryegrass (Lolium perenne L.) was studied during a two-year pot experiment (2005–2006). Meat-and-bone meal was applied in a single dose in 2005, before sowing. The meal was mixed with soil in the following dosage: 0.25, 0.5 and 1.0% per 10 kg soil per pot. The effect of meat-and-bone meal...
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The aim of this study was compare the results obtained after testing new spawning agents (Ovaprim and PG-600) in artificial reproduction of common tench in comparison to Ovopel, the spawning agent, which worked very well in this species. The tench spawners were collected from open waters. After catching, the selected fish were transported to the hatchery, where the fish were treated with the spawning...
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The aim of this study was to determine the effect of mixed multi-component fertilizers on spring wheat yield, the content and uptake of macronutrients. A three-year field experiment (2005–2007) was carried out in a randomized block design at the Research and Experimental Station in Tomaszkowo, at the University of Warmia and Mazury in Olsztyn. The experiment comprised three fertilization treatments...
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Ellagic acid is a biologically active compound, regarded as preventive against various diseases and demonstrates anticarcinogenic and antioxidant effects. In Poland, one of the five largest strawberry producers, the supply of these fruits is significant; therefore exploration of this subject and dissemination of the knowledge concerning their nutritional values and health-related properties is important...
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A study was carried out into sedimentation of sludge obtained in the process of coagulation-flocculation of pulp and paper wastewater with the use of PAC and organic polymers. An attempt was made to evaluate the effect of various organic polyelectrolytes on phase separation effectiveness. It was found that the application of cationic polymers at a dose of 1 mg dm⁻³ and 1.5 mg dm⁻³ (Z 63 and Z 92,...
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Artificial reproduction of asp under controlled conditions was done using two different spawning agents based on GnRH analogues and dopamine antagonists (Ovopel and Ovaprim). Fish in the Ovopel and Ovaprim and combined treatment groups were treated with a dose equivalent to 1.2 pellets (0.2 and 1.0), 0.5 cm³ liquid (0.1 and 0.4) and 0.2 pellets and 0.4 cm³ liquid per kg of body weight respectively...
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The aim of the study was to evaluate the fatty acids composition of storage fat of slaughter horses. Samples of cervical and peri-intestinal fat taken from horses of different genders and weights in a slaughterhouse were used as the study material. The fat was esterified by the method described by Peisker. Separation and analysis of the fatty acids was conducted by gas chromatography with a flame...
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The objective of this study was to determine the carcass weight of red deer (Cervus elaphus L.) stags, hinds and calves in Poland in successive months of the hunting season. The results of the study show that the average carcass weight of stags, hinds and calves in Poland is 115.05 kg, 75.38 kg and 42.48 kg, respectively. Stags characterized by the heaviest carcasses inhabit the provinces of Podkarpacie,...
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The objective of this study was to determine the effect of oxidative stress caused by exposure to ozone on the activity of 17-β-hydroxysteroid dehydrogenase and alkaline phosphatase, and testosterone concentrations in male rats, and to investigate the possible protective effect of easily available antioxidants such as vitamins E and C. The experiment was conducted on adult Wistar-Hannover rats. One...
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Effects on the reproduction of C. gariepinus after ovulation stimulation with carp pituitary homogenate (CPH), Ovopel or Dagin were investigated. After the application of Ovopel all the females spawned while after CPH or Dagin treatment spawning was reduced to 83.3%. No statistically significant effect of the stimulator was found on the weight of eggs expressed in g and in % of female B.W. however,...
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The purpose of this study has been to characterize the ichthyofauna of the Upper Wkra River during the initial stage of the implementation and execution of revitalization of the Nida River in the commune of Nidzica. The study covered a nearly 5-km-long section of river flowing across the commune of Nidzica. Four sites of control catches were localized between the administrative border to the town...
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The aim of the study was to evaluate the quality of peanuts available on the Olsztyn market. The quality of researched peanuts was evaluated by determining degree hydrolysis and oxidation of oils and composition of fatty acids. Out of the nine peanut samples under examination, the content of primary and secondary products of oxidation was very high in eight of them, which could indicate their unsuitability...
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The research was carried out in Lake Piecki and Lake Nawionek, two lobelia lakes located within the Zaborski Landscape Park. Water samples were collected from the surface and bottom water layers in spring, summer and autumn 2009. The analysis reveals that the total number of planktonic bacteria (TNB) in Lake Nawionek ranged between 8.83 and 36.22·10⁵ cells/cm³ and between 15.77 and 44.93·10⁵ cells/cm³...
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The aim of the study was to compare the effectiveness of hormonal stimulation of the female ide (Leuciscus idus L.), following the application of two commercial preparations concerning different GnRHa combined with dopamine inhibitors: Ovopel and Ovaprim. Ide spawners were bred under controlled conditions. The examined parameters included the percentage of ovulating females, time of ovulation and...
