No abstract

If it is necessary to reduce the anthropogenic impact on agroecosystems in conditions of constant increase in the cost of resources – improving the technology of growing corn through the use of nanotechnologies is one of the prerequisites for increasing the yield of crops and their profitability. In this regard, the purpose of the study was to investigate the biological activity of Zn nanocarboxylates and MoS2 nanoparticles at different concentrations for the germination, growth, and development of corn seedlings. An experiment was conducted on corn sprouts to determine the effect of Zn and MoS2 nanoparticles. The germination rate and germination energy of seeds under the action of nanoparticles were determined in accordance with the requirements of the state standard DSTU 4138-2002. The study results were analysed by generally accepted statistical methods. It was established that MoS2 nanoparticles when diluted at 1:10,000 (at a concentration of 700 mcg/l) show biological activity and cause an increase in the length of leaf blades and the length of the roots of corn seedlings by 35.0% and 100.0%, respectively. At other concentrations (1:100; 1:1,000) of Zn and MoS2 nanoparticles, no significant effect on the size of leaf blades and roots was observed. According to the results of the Mana-Whitney test, in all variants, with the exception of the action of MoS2 nanoparticles in a 1:10,000 dilution, the significance level of changes was not sufficient. Only in the variant with MoS2 at 1:10,000 dilution, an increase in root length was statistically significant. There was no statistically significant effect in all the studied variants on the germination energy and laboratory germination of maize seeds. The practical value of the study is to assess the effect of drugs (Zn nanocarboxylates and MoS2 nanoparticles) for foliar top dressing, a wide range of which is offered to agricultural producers, selection of effective concentrations for the growth, development, and yield of corn per grain

No abstract

The work is devoted to the solution of an actual scientific task in the field of civil protection, namely, the development of a method for detecting focal signs of an emergency situation due to a fire at critical infrastructure facilities, with the aim of further developing a method of preventing terrorist emergencies at critical infrastructure facilities of Ukraine. In order to solve the set goal, it is necessary to: provide a description and carry out planning of the procedure for conducting a full-scale experiment to determine the focal signs of an emergency situation due to a fire at critical infrastructure facilities; determine requirements for equipment for measuring focal signs of an emergency situation due to fire at critical infrastructure facilities; determine the general conditions for the formation of an algorithm for the method of detecting focal signs of an emergency situation due to a fire at critical infrastructure facilities; provide recommendations on the possible use of the received information during the reconstruction of an emergency situation due to a fire at a critical infrastructure facility. This work is a continuation of the cycle of previous works on the development of structural, logical and mathematical models for managing an emergency situation of a terrorist nature at an object of the critical infrastructure of Ukraine, which is protected, which are intended for the development and constant implementation of procedures of an organizational and technical nature that ensure the safety of the object. Thus, the interpretation of the results of the measurement of electrical resistance must be accompanied by an analysis of the specifics of the volume-planning decisions of the building (premises), the conditions of air exchange, the distribution of the fire load in the center of an emergency situation due to a fire. The obtained results of the soot research can be used as part of the technical examination to reconstruct the process of the emergence and development of an emergency situation due to a fire at critical infrastructure facilities. Keywords: emergency situation, critical infrastructure object, technique, focal signs, thermal damage.