Various factors affect the performance of storage batteries and can reduce their performance. In practice, it is very difficult to realize the full use of active materials involved in the current generation process. About half of the active mass level does not participate in the reaction with the electrolyte, because they serve as the basis for making the electrode frame and ensure the mechanical strength of the materials. Therefore, the coefficient of real use of active materials of positive electrodes is 45-55%, and that of negative electrodes is 50-65%. In addition, a 35-38% solution of sulfuric acid is also used as an electrolyte. Therefore, the actual consumption of materials is higher than the theoretical consumption, and the actual energy volume is somewhat lower. The leakage of the electrolyte from the separator largely depends on its concentration. First, if the density of the electrolyte decreases, its weight decreases, which reduces its flow, but the decrease in density leads to a decrease in viscosity, which increases its fluidity. Therefore, it is desirable to determine the relationship between the concentration of the electrolyte, its distribution over the height of the separator and its fluidity during the experiment. This is a very important factor, as the electrolyte concentration changes after a certain period of time during battery operation, and the optimal concentration of the acid used as an electrolyte plays a major role in ensuring performance. In these studies, the effect of the concentration of the electrolyte used as a working electrolyte on the working efficiency of the batteries as a result of the increase in the pores of the separator and the change in fluidity at different compression levels was studied.
Dust of the two Tillandsia species were predominant among dust types found on the honey bees. Examples of B. atratus, B. morio and T. spinipes, found on the blossoms of T. stricta, introduced 100% dust from that plant. Bombus atratus examples visiting T. tenuifolia, introduced 90% dust from that source and 10% from Mimosa pudica, accordingly uncovering the upward scavenging conduct of this honey bee species. Honey bees that visit T. tenuifolia e T. stricta on their blossoming are likely dispersers of their dust.
Dust of the two Tillandsia species were predominant among dust types found on the honey bees. Examples of B. atratus, B. morio and T. spinipes, found on the blossoms of T. stricta, introduced 100% dust from that plant. Bombus atratus examples visiting T. tenuifolia, introduced 90% dust from that source and 10% from Mimosa pudica, accordingly uncovering the upward scavenging conduct of this honey bee species. Honey bees that visit T. tenuifolia e T. stricta on their blossoming are likely dispersers of their dust.
Zinc deficiency is a major health concern in many developing countries, and rice is a staple food for millions of people worldwide. This study aimed to investigate the effect of zinc biofortification on nutrient concentration in rice grain. Two rice cultivars were grown under zinc-sufficient and zinc-deficient conditions, with and without zinc fertilization. Zinc biofortification significantly increased zinc concentration in rice grain and improved the bioavailability of other micronutrients, such as iron and manganese. However, there was no significant effect of zinc biofortification on the macronutrient concentration of rice grain. These findings suggest that zinc biofortification can be an effective strategy to address micronutrient malnutrition in rice-consuming populations.
Zinc deficiency is a major health concern in many developing countries, and rice is a staple food for millions of people worldwide. This study aimed to investigate the effect of zinc biofortification on nutrient concentration in rice grain. Two rice cultivars were grown under zinc-sufficient and zinc-deficient conditions, with and without zinc fertilization. Zinc biofortification significantly increased zinc concentration in rice grain and improved the bioavailability of other micronutrients, such as iron and manganese. However, there was no significant effect of zinc biofortification on the macronutrient concentration of rice grain. These findings suggest that zinc biofortification can be an effective strategy to address micronutrient malnutrition in rice-consuming populations.
Purpose of the study: to study the effect of the combination of valsartan and sacubitril on the indices of central hemodynamics in patients with coronary heart disease (CHD) within 2 years after revascularization. Material and research methods. The study included 320 patients with coronary artery disease who underwent coronary revascularization. All patients were divided into 2 groups: patients who received valsartan (group B, 160 people), patients who received ARNI - a combination of valsartan and sacubitrile molecules (group C, 160 people). At baseline and in dynamics after three months, at the end of the first and second years of follow-up after revascularization in patients with coronary artery disease systolic the blood pressure (SBP, mm Hg), diastolic blood pressure (DBP, mm Hg), heart rate in minute, the concentration of brain natriuretic peptide (BNP) in the blood were determined. Also, during echocardiography, the stroke volume of the heart, indexed to the body surface area (SI, ml / m2), the minute index (MI, ml / m2), the mean pressure in the pulmonary artery (PA, mm Hg) were determined. Research results. In the group of patients taking valsartan (group B), the relative dynamics of BNP concentration was -10.69 ± 0.55% by the 3rd month of observation, -21.24 ± 1.03% by the end of the 1st year, and -34, 39 ± 1.64% by the end of the 2nd year of observation. The inclusion of sacubitril in the therapy scheme contributed to a greater positive effect in reducing the BNP concentration: the relative dynamics of the BNP concentration was -10.30 ± 0.52% by the 3rd month of observation, - 21.91 ± 1.00% by the end of the first year of observation, and -39.28 ± 1.67% (p <0.05 significant difference with group B). By the end of the 1st and 2nd years of observation, the use of a combination of valsartan and sacubitril contributed to a more pronounced decrease in blood pressure (p <0.01), a more pronounced dynamics of MI (p <0.05) and a decrease in pressure in РA (significantly lower baseline indicators, p <0.05 and indicator in group B, p <0.01). Conclusion. The present study revealed a positive effect of revascularization and subsequent therapy of coronary artery disease with the inclusion of sacubitrile on the BNP concentration, blood pressure and mean pressure of pulmonary artery.
We examined 43 patients with breast cancer, who, as in the previous group, underwent percutaneous transhepatic cholecystostomy, however, the bile separated through the external drainage was preliminarily purified from toxic and ballast substances using the Lignov sorbent. Subsequently, the patients took it orally.
In the first group of patients, the concentration of IL-6 in the blood serum prior to the application of percutaneous transhepatic cholecystostomy was higher than normal, averaging 152.65±16.3 pg/ml. Immediately after the application of percutaneous transhepatic cholecystostomy in bile, this indicator averaged 68.58±7.24 pg / ml. At the end of the observation, the decrease in the level of IL-6 in the blood compared to the initial one was 64.4%, and in bile-54.3 (P<0.001). In the second group of patients, after the application of percutaneous transhepatic cholecystostomy, the concentration of IL-6 in the blood serum averaged 151.52±14.2 pg / ml, and in bile - 67.43±9.14 pg/ml. The initially high concentration of IL-6 in the blood and bile after bile absorption decreased by 75.7% (36.81±4.4 pg /ml) and 73.9% (17.57±2.2 pg/ml), respectively, from the initial level. The inclusion of bile absorption in the therapeutic complex significantly changed the concentration of IL-6 in blood serum (P<0.01) and bile.
The dynamics of parameters in blood serum and bile in patients of this group indicates a significant efficiency of bile absorption. Initially high indicators of endotoxicosis, such as SMP, TNF-α, IL-6 and bilirubin, were removed from the body by bile absorption, which made it possible to remove toxic substances from the body. The study of SMPs in blood serum and bile in patients of the main group revealed a more accelerated elimination of them with bile than in the control group. An increase in the concentration of SMP in bile was accompanied by a decrease in it in the blood serum.
This study delves into the industrial dynamics of major Indian states, focusing on the concentration and dispersion patterns within their respective industrial landscapes. India's diverse economic landscape is characterized by varying degrees of industrial development across states. Through a comprehensive analysis, this research investigates the concentration of industries in specific regions and assesses the dispersion of industrial activities in others. Utilizing data-driven approaches and geographic information systems (GIS), the study identifies key factors influencing industrial concentration and dispersion, such as policy incentives, infrastructure development, and economic trends. The findings offer valuable insights for policymakers, investors, and businesses seeking to understand and leverage the industrial pulse of India.
The article describes the devices for determining the concept of intellectual dust used in industrial enterprises, workplaces and residential areas and the principle of their operation, and analyzes their operation technology.
Cement production is one of the most common man-made air pollutants. In this regard, the need for dust collection in this process is obvious. The article presents an analysis of the used designs of dust collection devices in the cement production of the Fergana region of the Republic of Uzbekistan. Methods of tissue filter regeneration are analyzed. The results of experimental studies on the state of synthetic fabric bag filters installed on air purifiers from dust and gas flows are presented. The choice of the standard size, design and the required number of fabric bag filters was made. For technical and economic reasons, there is a method and mode of filter regeneration that does not cause severe wear of the fabric, due to which the duration of filter operation without expensive stops for current repairs is significantly increased.
This study delves into the economic dynamics of major Indian states, focusing on the industrial sector's concentration and dispersion. Employing comprehensive data analysis and statistical methodologies, we assess the spatial distribution of industries, examining the extent of concentration and dispersion in key states. Our findings contribute to a nuanced understanding of the economic landscape, shedding light on the factors influencing industrial clustering and dispersion patterns. By identifying regional disparities and concentration trends, this research aids policymakers, investors, and businesses in making informed decisions to foster balanced industrial development.
In order to determine the effect of the phosphoric element on the growth and development of
potatoes, their productivity and efficiency, studies were conducted to determine the optimal
nutrient medium in laboratory and field conditions. In nutritional variants with a concentration of P
of 16 mg / l and 48 mg / l, the P content is higher than in leaves. In nutritional variants with a
concentration of 48 mg / l, there is a smaller number of leaves compared to the 16 mg/l
concentration variants and a delay in the flowering period. It was found that the nutrients contain
important vital microelements in plant tissue and the output composition in variants of the
concentration of P is 16 mg /l.
This article presents a comprehensive analysis of the industrial concentration and dispersion patterns in major Indian industrial states. The study aims to assess the spatial distribution of industries within these states and understand the degree of concentration or dispersal. By examining key indicators such as employment, investment, and production across different regions, the research provides valuable insights into the industrial landscape of India. The findings contribute to a better understanding of the economic geography of Indian industrial states and inform policymakers and stakeholders in fostering balanced industrial development.
The article presents the results of a study on the dust retention properties of tree and shrub species used in landscaping in the city of Nukus, Republic of Karakalpakstan. According to the results, the trees and shrubs used in the landscaping of Nukus had the following indicators in terms of dust retention: the highest results were observed in mulberry (280 g / m2) and Cirrus elm (270 g / m2). The lowest rates were observed in the ailanthus, acacia and maple. Hence, it was found that trees with rugged leaves retain more dust than deciduous trees.
The article presents the results of an experiment to study the effect of surfactant concentration and type on foam formation in clay suspensions. As a result of the study, it was found that the addition of surfactants to the system leads to an increase in the volume of foam, and the most significant effect is observed when using surfactants of the type OP-10. With an increase in the concentration of surfactants to a specific value (0.3%), a sharp increase in the height of the foam is observed; however, a further increase in the concentration does not have a significant effect on the
amount of the formed foam. The study also showed that the height of the foam in the system with surfactant type OP-10 is higher than in the system with surfactant type GKJ-11, which indicates greater foam adsorption at the liquid-air interface. The study of the surface tension of surfactant solutions showed that the surfactant type OP-10 has more significant properties of the surfactant than the surfactant type GKJ-11. These results may be useful to improve the foaming in slurry drilling fluids using various types and concentrations of surfactants.
Before conducting field experiments, we tested dimilin against the gypsy moth in laboratory conditions. In this experiment, only the worms of the pest were taken.
In the version where Dimilin was used, when the drug was used at a concentration of 0.015% of the working liquid, the biological efficiency reached 70.2% by the 7th day of calculation, and when it was used at a concentration of 0.02% of the working liquid, the efficiency was 85.1% by the 7th day of calculation. When the drug Dimilin was used at a working liquid concentration of 0.03%, the biological efficiency reached 89.6% by the 7th day of calculation.
The article presents the results of the analysis of data on air pollution in the cities of the Republic of Uzbekistan (RUz) in 2021 based on the reporting data of the Service for Monitoring Air Pollution, Surface Water and Soil of the Center for Hydrometeorological Service of the Republic of Uzbekistan. Analyzed data on the study of the concentration of the main pollutants: dust, sulfur dioxide, carbon monoxide, nitrogen dioxide and oxide, ozone, as well as specific impurities and heavy metals. The results showed that the average annual concentrations of all pollutants under consideration did not exceed the maximum allowable concentrations, only in the atmospheric air of some cities was an excess of the average daily maximum allowable concentrations (MPC) observed. Pollution index. The atmospheric air pollution index (API) in the cities was in the range of 1.38-4.85.