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The paper shows that the use of nano-additives can reduce the content of harmful impurities in flue gases. It is demonstrated that the waste of the water treatment process of thermal power plants can be used as a cheap and environmentally friendly nanostructured additive to improve the properties of hydrocarbon fuel. If necessary, the effect of carbonate sludge can be enhanced by adding other nanoparticles. The composition and properties of carbonate sludge are presented. The prospectivity of extraction of valuable, rare-earth metals from technogenic wastes generated during combustion of fuel oil at power enterprises is proved.The results of the obtained experimental powder diffractogram of fuel oil ash are discussed.

In 2023, it was 130 years since the opening of the Alexander Surgical Hospital at the Tauride Provincial Zemstvo Hospital, where many talented doctors worked. This authors present new facts about outstanding surgeon who worked in Simferopol at the turn of the 19th and 20th centuries, Alexander Fedorovich Kablukov (1857-1915). He was a founder of surgical school in the Tauride province, who first described cholecystectomy In Russian-language literature. The report covers in detail famous surgery restored thanks to pre-revolutionary sources. Excerpts from other little-known reports of surgeon related to the treatment of gallbladder and biliary diseases are also presented.