Ultrastructure of meristem and root cap of pea seedlings under spaceflight conditions

Data of electron microscopic analysis of meristem and root cap of pea seedlings grown aboard the Salyut-6 orbital research station in the Oazis apparatus and in the laboratory are presented. The main morphological and anatomical characteristics of the test and control plants are shown to be similar. At the same time, some differences are found in the structural and functional organization of the experimental cells as compared to the controls. They concern first of all the plastic apparatus, mitochondria and Golgi apparatus. It is assumed that cell function for certain periods of weightlessness on the whole ensures execution of the cytodifferentiation programs genetically determined on the Earth. Biochemical and physiological processes vary rather markedly due to lack of initially rigorous determination

Термічний аналіз деревини та кори робінії несправжньоакації в деревостанах Північного степу України

The thermal degradation of the wood and bark of the main forest-forming spesies of artificial forest plantations of the Northern Steppe of Ukraine – Black locust (Robinia pseudoacacia L.) has been investigated using thermogravimetric methods – a thermogravimetric curve (TG) and a differential thermogravimetric curve (DTG), or a curve of the rate of change in the mass of the investigated sample. Thermal analysis of samples of wood and bark was carried out in an oxidizing (air) atmosphere. Some stages of thermal decomposition of wood and bark under conditions of a programmable heating up to 600°C at heating rates 10°C/min (TG/DTG/DTA) and their temperature intervals, mass loss, mass loss intensity and thermal effects have also been investigated. Wood and bark samples were fully characterized from that data which deals with the activation energy analysis at the individual stages of thermal decomposition. The dependences of the activation energy on the degree of conversion, as well as by comparison of the mass loss at the appropriate stages of the thermal degradation, thermal effects, residual mass and some other parameters of TG/DTG have also been evaluated. A greater content of constitutional moisture in the composition of the bark samples with decrease in the temperature of the onset of intensive destruction of the bark in comparison with wood have been revealed. The results of thermogravimetric measurements were analysed in the framework of the kinetic model of Brodo. The activation energy of processes of bark and wood destruction in each temperature range and in the whole investigated range is calculated and mathematical models are proposed for estimating the dependence of mass loss on the temperature degradation of the components of the aboveground phytomass of the studied forest-forming species. Comparison of DTA curves showed that the thermal effect of thermooxidative destruction of the bark as a whole is greater than that of wood, which correlates well with a decrease in the activation energy.За допомогою методів термогравіметрії – термогравіметричної кривої (ТГ), диференціальної термогравіметричної кривої (ДТГ), або кривої інтенсивності зміни маси досліджуваного зразка, досліджено термічну деструкцію деревини і кори головної лісотвірної породи штучних лісових насаджень Північного Степу України – робінії несправжньоакації (Robinia pseudoacacia L.). Термічний аналіз зразків деревини і кори здійснено в окиснювальній (повітря) атмосфері. Встановлено стадії термічного розкладання деревинної речовини і кори в умовах програмованого нагріву до 600 оС зі швидкістю 10 оС/хв (ТГ/ДТГ/ДТА), їх температурні інтервали, втрату маси, інтенсивність втрати маси та теплові ефекти. На основі аналізу величин енергії активації на окремих стадіях термічного розкладання, залежності енергії активації від ступеня конверсії деревини і кори, а також із порівняння втрати маси на відповідних стадіях термодеструкції, теплових ефектів, залишкової маси і інших параметрів ТГ/ДТГ, охарактеризовано деревину і кору робінії. Деревина робінії характеризується значнішою термостабільністю, ніж кора. Запропоновано математичні моделі для оцінювання залежності втрати маси від температури деструкції складників надземної фітомаси (кори, деревини) досліджуваного деревного виду

The Management of Solvency of Trade Enterprise in the System of Formation of Economic Security

The article, on the basis of research of existing approaches to the concept of «management of solvency of the Enterprise» and on the basis of identification and development of its essential characteristics, clarifies the content of the indicated concept. The main systemically important elements of solvency management of trade enterprise are defined and described in detail: object, subjects, goals, tasks, principles, functions, subsystems (outlines) of management. The target vector of management of solvency of trade enterprise is presented, which is directed towards growth of market value of enterprise. According to the specified outlines of solvency management of trade enterprise, methods and instruments of managerial influence are systematized. The structural-logical sequence of the process of solvency management of trade enterprise is substantiated, which covers strategic, current and operational levels and contains nine interrelated stages of work

Щільність основних компонентів фітомаси стовбурів дерев робінії несправжньоакації в умовах Північного степу України

Implementation of forestry measures aimed at obtaining high-quality wood, rational processing of wood raw materials is impossible without analyzing the variability of the density of the components of the trunk aboveground phytomass such as wood and bark. The results of estimation of the average natural and basic density of wood and bark of the stem of black locust trees under conditions of the northern steppe of Ukraine are presented. The object of the survey was Black locust (Robinia pseudoacacia L.) plantation of the Ukrainian Steppe zone. The experimental data of model tree from temporary plots were analyzed. The study was conducted on the 20 temporary plots in black locust stands in the most forest types, aged 3 to 89 years old, and productivity of IA-III classes of the bonitat. Thirty model trees of Black locust were selected on the sample plots with an area of 0.25 ha each, established in forest stands of different age. The variation of local nature and basic wood and bark density with the age of model trees and relative height of trunks were analyzed. The average local natural and basic density of the fractions of trunk phytomass was calculated using the computer program PLOT. It is revealed that the indices of the local natural and basic density of wood and bark of black locust trees in the conditions of the Northern Steppe of Ukraine have a combined type of changes with relative height of the trunk. From the compartment part of the trunk up to a relative height of 0.5h, an increase in the density values ​​occurs, with subsequent gradual decrease from the middle of the trunk to the top of the tree. The local basic density of wood of young trees (3–20 years old) has a rapid increase from the compartment part to a relative height of 0.1h with subsequent changes characteristic of other age groups. The most wood and bark natural density in the black locust trees were formed on the middle of the trunk (0.5h) at the age of 41–60 years. The obtained data on the local basic and natural density and their variability by relative heights and age ranges of model trees give an opportunity to characterize qualitatively the components of the phytomass of individual parts of the trunks of black locust trees.Здійснення лісогосподарських заходів, спрямованих на отримання якісної деревини, раціональне перероблення деревної сировини неможливі без аналізу варіабельності щільності компонентів надземної фітомаси стовбурів – деревини і кори. Наведено результати оцінювання середньої природної та базисної щільності деревини та кори стовбурів робінії несправжньоакації в умовах Північного Степу України. Дослідження проведено на 20 тимчасових пробних площах у робінієвих деревостанах у найпоширеніших групах типів лісу (С0–С1), віком від 3 до 89 років, продуктивністю IА–III класів бонітету. Проаналізовано зміну локальної щільності з віком модельних дерев та відносною висотою стовбурів. Середню локальну природну та базисну щільність фракцій фітомаси стовбурів розраховано з використанням комп'ютерної програми PLOT. Встановлено, що показники локальної природної та базисної щільності деревини і кори дерев робінії несправжньоакації в умовах Північного Степу України мають комбінований тип змін із відносною висотою стовбура: від окоренкової частини стовбура до відносної висоти 0,5h відбувається збільшення щільності з подальшим поступовим її зменшенням від середини стовбура до верхівки дерева. Локальна базисна щільність деревини молодих дерев (3–20 років) має стрімке зростання від окоренкової частини до відносної висоти 0,1h з подальшими змінами, характерними для інших груп віку. Найщільніша деревина і кора в дерев робінії несправжньоакації формується на середині стовбура (0,5h) у віці 41–60 років

Assessing the State and Efficiency of Social Capital of Ukrainian Enterprises

The negative nature of social capital, formed in the field of entrepreneurship, has a bad effect on the reputational component of the Ukrainian economy. At the same time, the unresolved issue of quantitative assessment of the social capital of enterprise makes it impossible to clearly identify its condition, problem areas and the formation of a management system. The aim of the work is to determine the structure and key indicators of the social capital of enterprise; to carry out an assessment of social capital of enterprises of Ukraine on the basis of the proposed methodology; to obtain practical results for further formation of the system of management of social capital of enterprise. The study was based on the principles of system approach and was carried out on the basis of a questionnaire survey using methods of analysis and synthesis, logical generalization, tabular and graphical methods of presenting information, as well as the method of grouping and systematization. A critical analysis of the literature on the issues under study allowed to allocate some comments on the existing proposals for assessing the social capital of enterprise: most of the indicators are data from a questionnaire survey; combining human capital and social capital indicators; too many indicators, which makes the assessment process quite time-consuming, etc. Taking into account the existing proposals of scientists and critical remarks on them, the authors have formed their own approach to assessing the state and efficiency of the social capital of enterprise, which is based on the following principles: hierarchy, structuring, dynamism, generalization, consistency, balance, integration and complexity. The current approach is more structured and succinctly describes the key system of indicators by assessment levels. The division of the social capital of the enterprise into states (potential or realized) allows to assess the impact of the social capital of the enterprise on the results of activity. The assessment is reduced to a complex indicator, but at the same time allows us to analyze individual components and structural levels of social capital. In the prospect of implementing this approach at the enterprise, we consider it expedient to ask some of the questions to employees, for example, regarding their views on trust in the team, and compare the answers obtained. Own observations show that employees often estimate the same situation differently, which leads to the deformation of social capital at the enterprise. In general, the obtained results are an important information source for the development of a system for managing the social capital of enterprise, which will be the subject of further scientific research by the authors

Assessing the Level of Budget Security of Ukraine in Conditions of Economic Instability

The purpose of the article is to study the theoretical foundations of budget security, highlight threats and directions for its strengthening, as well as an carry out an indicative analysis of the security situation in the budget sphere of Ukraine. Examining and summarizing the scientific works of many scholars, both economists and theorists, the authors’ own definition of the economic essence of «budget security» is developed. The basic foundations of theoretical identification of budget security of the State are allocated and substantiated. The indicators for assessing the level of budget security are outlined and the input information for their calculation is provided. The input information is analyzed to calculate the indicators of the state of budget security of Ukraine in 2016-2021. Critical and optimal values of indicators are highlighted. A list of indicators for determining the state of budget security of Ukraine in 2016-2021 was put to calculation. As a result, an integral indicator of Ukraine’s budget security was calculated. The level of budget security of Ukraine for 2022-2024 is prognosticated. Threats to ensuring the optimal level of budget security of Ukraine are allocated. It is proved that the main threats to Ukraine’s budget security can be determined by examining the ratio of total payments for servicing and repayment of public debt and the State budget revenues. The key directions of strengthening the budget security of our State have been identified. It is proved that ensuring the budget security of the State is one of the major tasks of implementing the strategic guidelines of the country’s development programs. Prospect for further research in this direction is to determine the degree of influence of business entities and the State institutions on the mechanisms for ensuring budget security. Further study and research of budgetary relations in the field of budget security can lead to the strengthening of traditional budget management

Estimating biomass of woody plants that grow in the different As-contaminated techno-soils in the ore-bearing provinces of Eastern Germany

Establishing the role of woody species as an instrument for heavy metal bioaccumulation is a relevant issue today in the context of the development of the phytoremediation system. The article presents the results of studies on the influence of different Arsenic (As) concentrations in soil on the development of aboveground biomass in Betula pendula Roth. and Populus tremula L. stands under conditions of reclamation plantings. The studies were conducted in 30 locations of birch and poplar tree plantations within the ore-producing regions of Saxony (Eastern Germany) in soil with different levels of As contamination. The highest As content was noted in the technosoil of the Davidschacht site, where the metalloid content was 229.3 times greater compared with a value in a conditionally uncontaminated area (Großschirma). The values of leaf area index and aboveground biomass obtained in field measurements were presented. The aboveground biomass values in the investigated plantations ranged from 189.9 ±10.16 to 201.8 ± 19.09 t/ha, and leaf area index values ranged from 1.74 ± 0.29 to 2.05 ± 0.16 m2/m2. Sentinel-2A multispectral images were processed for the construction of a map of the aboveground biomass distribution within the region under study. The values of the spectral indices for leaf area index were obtained with subsequent construction of the regression dependence of the aboveground biomass in the plantings on this indicator. The RMSE value for the developed model of the dependence of aboveground biomass on the leaf area index was 17.84 t/ha, which could be considered as satisfactory and can serve as a basis for practical application of the model developed. The inverse trend in relation to locations with different levels of soil contamination with As was determined for the aboveground biomass indicator. Within the region under study, the highest value of aboveground biomass in the stands was found for the area with the lowest As level. The results showed that the correlation coefficient between the highest of the optimal spectral indices, the leaf area index, and the aboveground biomass in B. pendula and P. tremula plantings was statistically significant and approached the value of 0.7. The results presented can become a theoretical basis for monitoring the accumulation of aboveground biomass of tree stands in areas with different levels of soil contamination with As. In perspective, the presented model of biomass estimation based on spectral technologies can serve as an application basis for rapid assessment of the growth and development parameters of forest stands in As-contaminated areas

Effect of antigibberellins on morphogenesis, photosynthetic apparatus, productivity and their residual content in tomato fruits

The application of growth and development regulators on crops in order to optimize their production process is one of the leading tasks of modern plant physiology. Retardants – gibberellin inhibitors are widely used for this purpose. We investigated the effect of foliar treatment with EW-250, ССС-750 and 2-СEPA on morphogenesis, leaf apparatus, content of photosynthetic pigments, indices of chlorophyll fluorescence induction, CO2 gas exchange, and residual amounts of drugs in the fruits of tomato (Lycopersicon esculentum Mill.) Bobcat hybrid. The field experiment was laid on plots with an area of 33 m2. The treatment of the plants was carried out at the budding stage. Morphometric indices were determined at the stages of flowering and fruit formation. The chlorophylls content was determined in the raw material by the spectrophotometric method. Indices of photosystem II (PSII) photochemical activity were determined according to the parameters of chlorophyll fluorescence induction after a half-hour exposure of plants in the dark using a portable single-beam fluorimeter "Floratest". The determination of the residual content of retardants in the fruits was carried out on a Shimadzu GC gas chromatograph with a mass spectrometric detector – GCMS- QP2020 EI. All gibberellin inhibitors reduced linear plant size. The number of leaves on the plants decreased under 2-CEPA treatment, and increased after the application of EW-250. Treatment with 2-CEPA decreased, EW-250 significantly increased, and CCC-750 practically did not change the leaves’ fresh and dry weight. Leaf area and leaf index decreased under 2-CEPA treatment, but practically did not change when EW-250 and ССС-750 were applied. All antigibberellin drugs increased the leaf specific leaf weight and thickened the leaf lamina due to the growth of chlorenchyma cells. At the same time, growth inhibitors increased the volume of columnar parenchyma cells and practically did not change the size of spongy parenchyma cells. Retardants increased the chlorophylls content in leaves, while the ethylene producer 2-CEPA did not change this index. The plants’ chlorophyll index after treatment with drugs increased significantly. The whole plant dry weight increased under EW-250 treatment, decreased after 2-CEPA application, and did not change under CCC-750. It was established that the photosynthetic rate increased under the EW-250 treatment, both in the flowering stage and in the stage of fruit formation, while when using 2-CEPA and CCC-750, it occurred only at the stage of fruit formation. The most significant positive changes of PSII photochemical activity indices were observed under the use of EW-250. Under the action of the drug, the maximum and actual quantum efficiency of PSII increased, the linear electron transport accelerated, and the fraction of reaction centers that did not transfer electrons from the primary acceptor QA to QB decreased, at the same time the chlorophyll fluorescence decay coefficient significantly increased, which indicates an increase in the CO2 assimilation intensity. Retardants increased the proportion of the fruit in the whole plant dry weight. All growth regulators increased net photosynthetic efficiency. A significant increase in fruit yield occurred under EW-250 treatment. When using CCC-750, the index tended to increase, while under the influence of 2-CEPA the yield decreased. The residual amounts of EW-250 and CCC-750 in the fruits did not exceed the maximum permissible concentrations

Chronology in the timeline of historical knowledge : collective monograph

Chronology in the timeline of historical knowledg

Heavy metal accumulation by Acer platanoides and Robinia pseudoacacia in an industrial city (Northern Steppe of Ukraine)

The role of tree species as a tool for bioaccumulation of heavy metals is an important current issue within the context of the increase of anthropogenic pressure in urban ecosystems. The article presents the results of research on the level of soil contamination with heavy metals and the processes of their accumulation by native and introduced tree species in green spaces of Dnipro city. Inductively coupled plasma mass spectrometry (ICP-MS) was used to detect concentrations of heavy metals (Zn, Cu, Cd, Pb) in soil samples and the assimilation component in trees of black locust (Robinia pseudoacacia) and Norway maple (Acer platanoides). The ranges of mean concentrations of heavy metals at different study sites within the city’s green infrastructure were as follows (mg/kg): 30.7–185.5 for Zn, 5.7–22.4 for Cu, 9.0–31.3 for Pb, and 0.213–0.598 for Cd. With respect to all four of these metals, the soils of the Metallurgists Square location were characterized by the highest concentrations of the metals, and the Pridneprovsky Park in the area of the outskirts of Dnipro city was characterized by the lowest ones. Compared to soils, the two investigated tree species had a significantly lower content of all studied metals in leaves. The heavy metal accumulations in the leaves of both R. pseudoacacia and A. platanoides were observed in the following decreasing order: Zn > Cu > Pb > Cd. Regarding the migration of heavy metals in the soil-plant system, the concentrations of ecopollutants in the plants were found not to be dependent on their content in the soil environment. The calculated bioaccumulation coefficients of heavy metals for both tree species were < 1. However, the results of heavy metal concentration in leaves of both introduced and native tree species evidenced their special role in heavy metal bioaccumulation. Compared to R. pseudoacacia, such native species as A. platanoides can be considered to be a more “sensitive” bioindicator of environmental pollution caused by heavy metals. Planting fast-growing tree species such as R. pseudoacacia and A. platanoides can in a short time be an environmentally appropriate and cost-effective measure to mitigate the unfavourable effects of heavy metals on the environment