Saltpeter negatively affects the human body, it contributes to the formation of a dangerous substance in the blood – methemoglobin, which leads to oxygen starvation. An increase in methemoglobin up to 60% leads to a fatal outcome. Also, the excess of saltpeter in water causes poisoning, disorders of the gastrointestinal tract, excretory and endocrine systems, the destruction of tooth enamel and the appearance of caries. Saltpeter can be determined in water by chemical analysis of the liquid, as well as using nanomaterials. These structures have a sufficiently highly developed adsorption surface, this property helps to detect the presence of saltpeter in water, and at the same time to clean it. The results of the studies made it possible to establish that after passing water with an admixture of saltpeter, the concentration of the latter decreased. Thus, the theoretical calculations showing the possibility of saltpeter adsorption by carbon nanotubes were confirmed. The obtained results and the applied methods can be used in conducting complex high-performance water examinations.
The development of information technologies necessitates the solution of various problems of information security. Physical means of protecting information processed by computer objects include radio-absorbing materials. They prevent the interception of information on electromagnetic radiation and interference in power supply and grounding lines. The general requirements for radar absorbent coatings are: a high level of attenuation of the reflected signal, a wide frequency range of operation and the cost-effectiveness of the structure during its manufacture and operation. The ability of a material to absorb high-frequency radiation depends on its composition and structure. The materials are quite diverse in their design and structure, and yet there are averaged performance indicators for the most established RPM groups. However, not every material can maintain performance under harsh external application conditions. The paper develops criteria for comparing the following radio-absorbing coatings: conductive paint (Shielding coating) with water-based silver Water Based Silver Conductive Coating MG Chemicals 842WB Super Shield™; Water Based Silver Coated Copper Conductive Coating MG Chemicals 843WB Super Shield™; Water Based Nickel Conductive Coating MG Chemicals 841WB Super Shield™. Their properties and advantages were investigated, and their comparative analysis was carried out on the basis of the selected criteria.
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