On the hygienic rating of silicon compounds in drinking water (literature review)

Introduction. Silicon is a unique element in its physicochemical properties, almost ubiquitous in water supply sources but is not normalized in drinking water in the world practice of ensuring the harmlessness of water use of the population. In our country, the half-century history of the development of hygienic silicon standards in the water began with the justification of the MPC of silicon-containing reagents used in water treatment. However, over time, doubts have arisen about the suitability of manufactured silicon standards for controlling natural silicon in drinking water. Proponents of the harmlessness of natural soluble forms of silicon advocated the elimination of silicon standards in water. In contrast, researchers of the action of silicon in silicon biogeochemical provinces have constantly revealed its adverse effects on the health of the population living in these regions, confirming this with animal experiments. methods. Literature search methods on Scopus, CyberLeninka, PubMed databases: selective, analytical-synthetic, typological. the main part. The review provides information on soluble forms of silicon, their stability and bioavailability, examines the retrospective and current state of hygienic rationing of silicon in water, discusses the shortcomings of the currently existing MPC of silicon, sodium and potassium silicates in drinking water. A detailed review of studies carried out in the silicon biogeochemical provinces of Chuvashia is given, where the inhabitants of the ecological disaster zone, who consumed drinking water with a profound imbalance of macro-and microelements and a high silicon content relative to the optimum area, observed various metabolic disorders (mineral, lipid, carbohydrate, peroxide), changes in microbiocenosis of the large intestine and immune status, an increase in the incidence rate of the adult population with chronic non-infectious diseases by 2-3 times against the national average, the highest incidence rates in children of all age groups. Conclusions. The review draws attention to the need for expanded studies of the effect on the body of natural silicon in drinking water with the usual balance of trace elements to resolve issues about the standards for natural silicon at the federal and regional levels and to establish differentiated standards for silicon-containing reagents in drinking water.

Natural and anthropogenic biogeochemical province of the biosphere over Cherepovets

AIM: This study aimed to summarize information on the formation of the natural and anthropogenic biogeochemical province of the biosphere over Cherepovets, develop biogeochemical standardization, and prevent environmentally conditioned human diseases. The migration of biogenic elements through food chains is analyzed. A significant flow of toxic elements entering the natural environment in the course of human industrial activity leads to the formation of anthropogenic biogeochemical provinces. In these geochemical zones and landscapes, the natural endemic environment interacts with chemical elements. As a result, biogeochemical cycles are altered, and vital elements are replaced with toxic metals. With these changes, intracellular biochemical reactions are disrupted. In this study, information on Cherepovets biogeochemical province formed in the 1960s was examined in the presence of intense industrialization. Data on high concentrations of heavy metals in the soil horizons of the given province were examined. Toxic elements actively accumulated in plants growing in the Cherepovets territory and vegetables growing in household plots within the city and the nearest 10 km zone. Metals accumulated in soil, different components of land ecosystems, and organs and tissues of carnivores. CONCLUSION: A high load in the Cherepovets biogeochemical province poses certain risks to the health of the population and causes the development of endemic diseases, microelementoses, and exogenous toxicoses in humans.

Use of “Kayod” Preparation in Cows

The Altai territory is an agricultural region; it is a biogeochemical province deficient in iodine. We conducted a study of metabolic disorders in cows that had hypofunction of the thyroid gland. Our research is devoted to the expediency of a single use of the drug “Kayod” administered in the form of a subcutaneous implant in order to normalize the therapeutic status of animals suffering from a chronic lack of iodine in their diet. The purpose of this work is to justify not only the use of the preparation “Kayod” in animals kept in the biogeochemical provinces deficient in iodine, but also the use of tablets administered through a subcutaneous implant. We found a significant increase in the amount of hemoglobin and a decrease in the number of white blood cells in the blood of animals after the use of “Kayod”, and in the second experimental group, these indicators were slightly higher than in the first one. Indicators of the level of total protein and reserve alkalinity of blood were within the limits of physiological norms, but in the experimental groups they were slightly higher than in the control group. The level of total calcium and carotene in the blood of animals in the experimental groups, especially the second, significantly exceeded the level of the same substances in the blood of the animals in the control group. However, the level of inorganic phosphorus tended to decrease. The level of glucose in the blood of cows in the experimental group increased significantly more than in the blood of cows in the control group. This increase was particularly significant in the blood of animals in the second experimental group. When the preparation “Kayod” was used in the form of a subcutaneous implant, there were no clinical signs of hypothyroidism in the cows of the first experimental group after nine weeks. In the cows of the second experimental group, the condition of the cows returned to normal after six weeks. Keywords: Cows, iodine, hypothyroidism, implant, “Kayod

Third Revision of the Bottom-up Global Surface Seawater Dimethyl Sulphide Climatology (DMS-Rev3)

<p>An updated estimation of the bottom-up global surface seawater dimethyl sulphide (DMS) climatology, DMS-Rev3, is the third of its kind and includes five significant changes from the last climatology, ‘L11’ (Lana et al., 2011) that was released about a decade ago. The first change is the inclusion of new observations that have become available over the last decade, i.e., the total number of observations included in DMS- Rev3 are 865,109 as compared to 47,313 data points used in the last estimation (~1728% increase in raw data). The second was significant improvements in data handling, processing, filtering, to avoid bias due to different observation frequencies. Thirdly, we incorporated the dynamic seasonal changes observed in the ocean biogeochemical provinces and their variable geographic boundaries. Fourth change was refinements in the interpolation algorithm used to fill up the missing data. And finally, an upgraded smoothing algorithm based on observed DMS variability length scales (VLS) which helped reproduce a more realistic distribution of the DMS concentration data. The results show that DMS-Rev3 estimates the global annual mean DMS concentration at 2.34 nM, 4% lower than the current bottom-up ‘L11’ climatology. However, significant regional differences of more than 100% are observed. The largest changes are observed in high concentration regions such as the polar oceans, although oceanic regions which were under-sampled in the past also show large differences. DMS-Rev3 reduces the previously observed patchiness in high productivity regions.</p>

Correlation of essential microelements in large horned cattle in mother-offspring system as factor in development of immunosuppressive state

The nature of the mineral supply of certain biogeochemical provinces and their correlative interactions within biological organisms determine the degree of development of immunosuppressive states in animals. So we studied the level of minerals in the samples of hair and blood in cattle in the «mother-offspring» system and established the nature of the correlation of cobalt, zinc, iron and copper. It has been proven that low levels of cobalt (cows - 429.30 ± 4.05 nmol/l and calves - 430.80 ± 5.60 nmol / L) and zinc (cows - 7.21 ± 0.20 pmol/l and calves - 7.60 ± 0.15 pmol/l) against the threshold values of iron (cows - 17.90 ± 1.30 pmol/l and calves - 18.40 ± 1.80 pmol/l) and copper (cows - 13.90 ± 1.80 pmol/l and calves - 14.08 ± 1.05 pmol/l) in the blood caused hematopoietic function impairment and led to the development of mild hypochromic anemia (erythrocytes: cows - 6.01 ± 0.40x1012/l and calves - 6.36±0.50x1012/l) in animals in the «mother-offspring» system. In addition, metabolic disorders caused by nutritional deficiency of zinc contributed to a decrease in the synthesis of alkaline phosphatase (cows - 87.90 ± 5.10 U/l and calves - 126.80±4.02 U/l), exacerbating the disorder of erythropoietic function of red bone animal brain. A long-term imbalance of copper and zinc in the nutrient substrates of the studied animals was revealed, as evidenced by the results of a mineralogram of hairline samples (copper: cows - 13.910 ± 0.67 mg/kg and calves - 12.609 ± 0.70 mg/kg; zinc: cows - 57.960 ± 0.90 mg/kg and calves 60.315 ± 0.99 mg/kg), which ultimately led to a deficiency of zinc in the body, leading to the development of an immunosuppressive state (Ig M: cows - 0.99 ± 0.15 mg/ml and calves - 1.64 ± 0.05 mg/ml; Ig A: cows - 0.30 ± 0.05 mg/ml and calves - 2.05 ± 0.10 mg/ml).