The tissues of the head of honey bees which are kept in the areas with a medium and low level of technogenic burden demonstrate the decrease in the contents of iron, zinc, copper, chromium, nickel, lead and cadmium in comparison with the tissues of the head of honey bees grown in areas with a high level of technogenic burden. Due to the activity of saturated fatty acids with the even and odd number of carbon atoms in chain, monounsaturated fatty acids of n-7 and n-9 families and polyunsaturated fatty acids of n-3 and n-6 families, the contents of anionic fatty acids, which are inaccessible for the bee body, decreases in the tissues of the head of honey bees which are kept in the areas with a medium and low level of technogenic burden in comparison with the tissues of the head of honey bees grown in areas with a high level of technogenic burden. 3. Monounsaturated fatty acids of n-7 and n-9 families and polyunsaturated fatty acids of n-3 and n-6 families in the tissues of the head of honey bees lead to increase of the total number of easily accessible non-esterified fatty acids for the honey bees which are kept in the areas with a medium and low level of technogenic burden in comparison with the tissues of the head of honey bees grown in areas with a high level of technogenic burden. Furthermore, the intensity of transformations of the non-esterified form of linolenic acid in its more long-chain and more unsaturated derivatives rises in the head tissues of the former. This fact indicates that the reduction of technogenic impact on the area results in the increase of the activity of desaturase in the tissues of the head of honey bees. The contents of heavy metals, anionic and non-esterified fatty acids in the tissues of the head of honey bees which are kept in the areas with low level of technogenic burden undergoes the most significant changes.
The content of heavy metals, non-etherified and anionic forms of fatty acids, and also fatty acids of common lipids in honeycomb cells, obtained from hives placed in areas with high, medium and low levels of technogenic loading is investigated. The hives were located at the educational apiary of Lviv National University of Veterinary Medicine and Biotechnologies named after S.Z. Gzhytskyj (area with very heavy traffic and industrial activity) and in private beekeeping farms in the town Vynnyky and the village Chyzhyky, Pustomyty district, Lviv region (areas with lower intensity of traffic and industrial activity). Our research has shown that the newly-built honeycomb cells obtained from hives placed in the territory with medium and low levels of technogenic loading contain a lower quantity of such heavy metals as iron, zinc, cuprum, chromium, nickel, lead and cadmium. The total amount of non-etherified fatty acids with even and odd number of carbon atoms in the chain, monounsaturated fatty acids of n-7 and n-9 families and polyunsaturated fatty acids of n-3 and n-6 families was higher in these honeycombs. However, the total concentration of anionic forms of fatty acids with even and odd number of carbon atoms in the chain, monounsaturated fatty acids of n-7 and n-9 families and polyunsaturated fatty acids of n-3 and n-6 families was lower in these honeycombs. Due to the above-mentioned monounsaturated and polyunsaturated fatty acids the amount of fatty acids of common lipids rises. It leads to increase in the antibacterial and antifungal properties of honeycomb cells and reduction of fragility of their walls. The greatest changes in concentration of heavy metals, non-etherified and anionic form of fatty acids, and also fatty acids of common lipids occur in the newly built honeycomb cells in the territory with low technogenic loading on the environment.
The article presents the results of research on the influence of cadmium load on the body of young cattle. The purpose of the work was to investigate morphological indices of bulls blood during the development of experimental chronic cadmium toxicity. According to the morphological analysis of the quantitative and qualitative composition of blood, it is possible to deem objectively about the functional state of the hematopoietic system of the organism of young cattle. The research was conducted (on the basis of the farm of the village of Ivanivtsi, Zhydachiv rayon of the Lviv region) on 10 bulls of six months old, Ukrainian black-and-white milk breed, which were formed in 2 groups of 5 animals in each: control and experimental. Bulls of the control group were in the usual diet. Bulls of the experimental group were fed with a feed with cadmium chloride at a dose of 0.04 mg/kg body weight of the animal. It has been established that feeding Bulls with cadmium chloride in a dose of 0.04 mg/kg of body weight contributed to a decrease in hemoglobin to 84.5 ± 1.60 g/l and an increase in the content of methemoglobin to 5.2 ± 0.099%. The decrease in hemoglobin levels is due to the toxic effect of cadmium on erythrocytes, resulting in damage to erythrocyte membranes and increased content of methemoglobin. Formation of methemoglobin in bull blood during cadmium loading occurs as a result of oxidation of hemoglobin with the formation of superoxide anion, which in turn triggers (begins) free radical processes and exerts a destructive effect on cell membranes, as well as initiates the appearance of other active forms of oxygen. Feeding calcium cadmium chloride in a dose of 0.04 mg/kg contributed to a decrease in the number of erythrocytes in their blood. At day 20 of the experiment, the number of erythrocytes decreased by 14% relative to the control group. Decreasing the number of erythrocytes in the blood of young cattle may have been due to the inhibition of their production in the bone marrow. An important morphological indicator of blood is the determination of the average content of hemoglobin in one erythrocyte, which indicates the saturation of erythrocyte with hemoglobin. It was found that the average hemoglobin content in one erythrocyte of the bulls of the experimental group increased by 11.4 and 13.9% for 5 and 10 days. According to the results of the research, the reduction of the hematocrit values in the experimental group of bulls was detected at 10, 15 and 20 days of the experiment. A significant increase in the number of leukocytes in the blood of the bulls of the experimental group was observed at 15 days of the experiment, according to the control group indicators, it increased by 12%.
We studied the impact of nitrate and cadmium load on protein and nitrogen metabolism in young cattle. The feeding with forage of sodium nitrate at a dose of 0.15 g NO3/kg and cadmium chloride at a dose of 0.02 mg/kg of body weight leads to a violation of protein and nitrogen exchange, as indicated by the low levels of urea, total protein and high levels of ammonia. We registered that the lowest urea content in blood serum of research bulls was on the 20 th day of the experiment. The combined use of nitrate and cadmium on the animals was accompanied with a greater reduction of urea concentration in their blood, caused by sodium nitrate. The gradual reduction of urea in the blood serum of bulls indicated reduced activity of metabolic processes in an organism of bulls and inhibition of functional capacity of the liver to synthesize proteins. Under the influence of nitrites and cadmium in our experiments in an organism of bulls was set the decrease in total protein in serum, depending on the intensity of met hemoglobin formation and the level of aggressive forms of oxygen, are formed after the activation of these processes. The changes of total protein level in the blood serum can be considered as suppression of protein synthesizing liver function. Calves feeding with sodium nitrate and cadmium chloride promoted significant increase of ammonia in the blood serum than just feeding of calves with sodium nitrate. On the twentieth day of the experiment the level of ammonia in the second experimental group of animals was higher by 53% towards the control.
Analysis of the available scientific literature indicates that the amount and composition of fatty acids in feed directly and very quickly affects the fatty acid composition and functional activity of cell membranes through phospholipids. In particular, the fatty acid composition of phospholipids of cell membranes is the main factor influencing the intensity of the transition of various compounds, including heavy metals and various forms of fatty acids, by active and passive transportation into the tissues of bees. The egg-laying of queen bees and the honey productivity of worker bees strongly depend on the activity of the latter.Based on the above, the aim of our research was to establish a link between the content of phospholipids, their fatty acid composition and the sorption capacity of honey bee head tissues and their reproductive capacity and productivity depending on the amount of flaxseed oil in the feed additive.Experimental studies were conducted in the spring and summer season on clinically healthy honey bees of the Carpathian breed (Apis mellifera
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