On this day 106 years ago, on July 15, 1919 (June 18, 1919 in the lunar calendar), German organic chemist Emil Fischer died. Hermann Emil Fischer (October 9, 1852 - July 15, 1919) On July 15, 1919, German organic chemist Emil Fischer, known as "the light of the laboratory", died in Berlin. In the second half of the 19th century and at the beginning of the 20th century, in the field of organic chemistry, German Fischer was one of the most famous scholars. He discovered phenylhydrazine and made outstanding achievements in the study of carbohydrates and purines, for which he was awarded the Nobel Prize in Chemistry in 1902. His contributions to the development of science mainly include: research on carbohydrates; research on purine compounds; research on proteins; mainly amino acids and peptides; contributions to chemical production and chemical education. It can be said that he is the founder of biochemistry, and he laid an important foundation for the study of modern egg autologics and nucleic acids.