Fauzan Khattak

The invention of the ball-and-stick model.

definition The ball-and-stick model is a molecular model of a chemical substance in which both the three-dimensional position of the atoms and the bonds between them are displayed[1]. INVENTION The German chemist August Wilhelm von Hofmann invented[2] the ball-and-stick model in 1865 in order to better explain the molecular makeup of chemical substances. Initially, he …

The invention of the ball-and-stick model. Read More »

The discovery of aspartic acid.

definition Aspartic acid is a nonessential amino acid with the chemical formula C4H7NO4. It is widely distributed in proteins and found as an excitatory neurotransmitter in the central nervous system. It is found especially in young sugarcane and sugar-beet molasses[1]. DISCOVERY The French chemist Auguste-Arthur Plisson discovered[2] aspartic acid in 1827 when repeating an experiment …

The discovery of aspartic acid. Read More »