Marko Leko
Marko T. Leko (Serbian Cyrillic: Марко Т. Леко) was a notable Serbian scientist, chemist, professor and president of the Serbian Red Cross.
Marko T. Leko was born in Belgrade, Serbia, on September the 17th, 1853 to a merchant family. He attended and graduated from Polytechnic school in Zurich and obtained his doctoral degree in 1875. For a short period he was employed in Hoffmman's laboratory. His teaching posts include:
1880-1884 professor of chemistry in Belgrade's secondary schools
1881-1894 professor of chemistry in Serbia's Military Academy
1894-1905 professor of chemistry in then Belgrade Higher School
1884 became a member of Serbian Academic Society
1892 became a member of Serbian Royal Academy
1902/3 and 1903/4 was the Dean of then Great School
1904-1920 state chemist and superintendent of State's Chemical Laboratory in Belgrade
1897-1907 was a confounder and president of the Serbian Chemical Society
Career
He has 52 publications mostly in the areas of organic and analytical chemistry. Thanks to work he dedicated in writing his doctoral dissertation and number of works that followed, he was able to solve one of the most sought problems of the time: does ammonium chloride and its closely related compounds belong to compounds of five valence nitrogen, NH4Cl, or to compounds such as NH3·HCl.