From DNA to Beer

Justus Liebig

Justus Freiherr von Liebig (1803–1873) was a German chemist whose work was instrumental in the development of the fertilizer industry. His book, Animal chemistry… describes the chemical changes that take place during fermentation, decomposition, respiration, digestion, and other natural processes. Before Pasteur’s work determining that microbes are the agents of putrefaction, scientists explained fermentation by citing the chemical changes that occur during the process.