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Dr. Oleg Lapotko (born 18 July 1939) is an Estonian scientist who specializes in the methods and means of extraction of biologically active substances from plants and other materials. He was born in the city of Kaluga, Russia and emigrated to Estonia in 1987.

In Estonia, he first worked as a chief technologist of an inter-regional construction organisation, creating a new roofing material for houses and structures with a durability of over 30 years based on chlorosulphonated polyethylene. He later founded the Estonian Stock Exchange in 1990 and became the Member of the Management Board of the state-run joint-stock company Silmet in 1994. In 1992, he was granted an honorary Estonian citizenship for the exemplary services to the Republic of Estonia.

Having studied the peculiarities of the extraction of biologically active substances from plants, fungi and mushrooms growing in the specific conditions of the ecologically pure Estonian islands for many years, he created, tested and patented the universal biologically active food supplement VitaNor. VitaNor is an extract made of a nutrient-rich plant Alfalfa (Medicago sativa). Today, the factory of VitaNor's extract is based on an Estonian island Saaremaa.

Education
Dr. Laptko attended in-service training at the Byelorussian Polytechnical Institute, Moscow Engineering Institute in 1965. He then obtained a Master's degree at the Byelorussian Academy of Sciences in 1972 and doctoral studies at the Byelorussian Polytechnical Institute in 1985. After graduation from the institute, he worked as a designer and adjuster of hydro-automatic systems and hydraulic drives of machines and equipment at various engineering factories in the city of Minsk (Byelorussia).

His engagement in theoretical developments and practical skills evolved into a fundamentally new theory of the functioning of working fluids of positive-displacement hydraulic drives. Expanding on this theory, he wrote and defended the Master’s thesis in 1972 and the Doctoral thesis in 1985.

Achievements
During his career, he has contributed to the total of 267 scientific publications that focus on the functioning of working fluids of positive-displacement hydraulic drive, including 69 patents. He has served as a scientific supervisor of seven technical Master’s degree students, whose topics were all connected to substantiating the main aspects of the theory on the functioning of working fluids of positive-displacement hydraulic drives.