Emission of gases from coal at low-temperature oxidation depending on the oxygen sorption rate

Coal oxidation by air oxygen can cause a process of spontaneous combustion with intense emission of carbon oxide and danger to initiate explosion of combustible gases. To detect the process of coal spontaneous combustion in mines, they use a gas analysis method providing control of concentrations of carbon oxide, hydrogen and hydrocarbons in the atmosphere. The conducted researches showed that at low-temperature oxidation of coal the intense emission of these gases without temperature increase is possible. Concentration of carbon oxide significantly increases with the growth of coal oxygen sorption rate. Ethylene and carbon dioxide show similar regularities. Acetylene is not found as a result of low-temperature oxidation of coal, and emission of hydrogen, methane, ethane, propane and propylene does not depend on the coal oxygen sorption rate.

Inkjet Oxygen-Sorption Treatment in Local Treatment Purulent Soft Tissue Wounds

Relevance. Traditional treatment of septic wounds of soft tissues often leads to the development of complications, causing more than 30% of deaths after surgery. The oxidative and bacterial components have a key role in the pathogenesis of septic processes. The aim of the study was to develop a method of treatment of septic wounds, based on a combination of jet technologies, oxygenation and sorption therapy, and also to study the effectiveness of its use. Materials and methods. Studies were conducted on 120 white Wistar rats with septic wounds of soft tissue. There were 4 groups: 3 control and 1 experimental. There was no treatment in the 1st control group. Bandages and treatment of the wound with oxygen flow were performed in the 2nd control group. In the 3rd control group, bandages were performed, and the sorbent was applied to the wound surface. In the experimental group, in addition to dressings, jet oxygen-sorption treatment of the wound surface was carried out. The study of the effectiveness of the method was carried out using objective, histological, histochemical, bacteriological and statistical methods. Result. During the jet oxygen-sorption treatment of the wound surface, the disappearance of hyperemia was noted by 23.1%, the end of necrolysis - by 25.7%, the appearance of granulation - by 24.3%, wound epithelization - by 17.0% faster, compared with the data of the 1st control group. Conclusion. Use of the method the jet oxygen-sorption treatment for the treatment of septic wounds of soft tissues reduced the wound area by 1 day by 4.8%, 3 day by 6.7%, to 7-days 19.1% and to 10-day 43.9% compared to the 3rd control group.

Oxygen Sorption Treatment in the Treatment of Soft Tissue Wounds

Background. The number of patients with soft tissue wounds does not tend to decrease, which is largely due to the growth of patients with injuries, ulcerative defects, skin tumors, comorbid pathology, including diabetes mellitus, antibiotic-resistant strains and other causes. New methods of local treatment of wounds based on the application of the latest achievements of science are constantly being introduced into the work of surgical departments. High efficiency is demonstrated by the use of sorbents and oxygen, which enhance the reparative processes in wounds.The aim of the study was to study in experimental conditions the effectiveness of the method of surgical treatment of soft tissue wounds, based on the use of jet oxygen sorption treatment (SCS).Materials and methods. The study was performed on 150 white Wistar rats in 5 groups of animals. In the 1st control group treatment was not carried out. In the 2nd and 3rd control groups, the wound surface was treated with a jet of air and oxygen, respectively; in the 4th control group, sorbent was applied to the wound surface. In the 1st experimental group conducted scso wound surface. The study of the effectiveness of SCS was carried out using objective, planimetric, histological and histochemical research methods. Results. The use of sorbent (4th control group) and the method of jet oxygen sorption treatment (1st main group) led to the most pronounced positive changes-acceleration of relief of the studied symptoms by 1.1-1.3 times and 1.2 1.5 times, respectively, compared with the data obtained in the 1st control group. Treatment of wounds with oxygen jet (3rd control group) had practically no advantages in comparison with treatment with air jet (2nd control group).Conclusion. Indirectly, the highest activity of reparative processes during the observation period in the 4th control and 1st main groups was confirmed by the average optical density of RNA and SH-groups, and their desire to normalize to 10 days could indicate the completion of processes of stratification in the wound area. In total, the average area of wounds was minimal in the 1st experimental group, where this figure was by the 3rd and 10th days-74.0% and 99.5% compared to the baseline data.