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Leopold Gmelin (2 August 1788 – 13 April 1853) was a German chemist. Gmelin was professor at the University of Heidelberg among other things, he worked on the red prussiate and created Gmelin's test. == Life == Gmelin was a son of the physician, botanist and chemist Johann Friedrich Gmelin and his wife Rosine Schott. Due to his family he early came in contact with medicine and the natural sciences, in 1804 he attended the chemical lectures of his father. In the same year Gmelin moved to Tübingen to work in the family pharmacy, he also studied at the University of Tübingen among others at Ferdinand Gottlieb Gmelin ( a cousin ) and Carl Friedrich Kielmeyer ( husband of a cousin ). Supported by Kielmeyer, Gmelin moved to the University of Göttingen in 1805 and later he worked as assistant in the laboratory of Friedrich Stromeyer, by whom he successfully passed his exams in 1809. Leopold Gmelin returned to Tübingen and again heard the lectures of Ferdinand Gottlieb Gmelin and Carl Friedrich Kielmeyer. In February 1811 Gmelin clashed with the medical student Gutike, according to an insult he challenged him to a duel, without serious injuries. Because duels were forbidden among students the incident was kept a secret at first, he nevertheless came to light. On March 10 Gmelin fled and went to Joseph Franz von Jacquin at the University of Vienna. Focus of his research was the ''Black pigment of oxen and calves eyes'', outcome of this work was also the subject of Gmelins dissertation. In 1812 he received his doctorate in Göttingen in absentia. Until 1813 Gmelin went on an extensive study trip through Italy. After his return, he began to work as a Privatdozent at the Heidelberg University since the winter semester of 1813/14, at first he worked on his Habilitation in Göttingen. On 26 September of the following year he was appointed associate professor in Heidelberg. In the fall of 1814, he went on another educational trip to Paris to study at the Sorbonne, he remained there until the spring of 1815. Together with his cousin, Christian Gottlob Gmelin he made the acquaintance of René Just Haüy, Joseph Louis Gay-Lussac, Louis Jacques Thénard and Louis Nicolas Vauquelin. 1816 Gmelin married Louise in Heidelberg-Kirchheim, a daughter of the Kirchheimer pastor Johann Conrad Maurer, the lawyer Georg Ludwig von Maurer became his brother-in-law. Together they had three daughters and one son, including Auguste, the future wife of the physician Theodor von Dusch. As the chemist Martin Heinrich Klaproth died in Berlin in 1817, Gmelin should actually succeed him. However, he refused and became full Professor of Chemistry at the Heidelberg University. There, a close cooperation with Friedrich Tiedemann evolved with time. The two published "The digestion after tests" in 1826 and established the basis of the physiological chemistry. In the field of digestive chemistry Gmelin later discovered more components of bile and introduced Gmelin's test. When Friedrich Wöhler worked on complex cyanogen compounds in 1822, Gmelin assisted him and discovered the ''Red prussiate''. From 1833 to 1838 Gmelin owned a paper mill in the north of Heidelberg situated Schriesheim, he had taken it over in the hope of profit. However, the work in the mill showed to be very time and money consuming and at the expense of his academic activity. In 1817 the first volume of Gmelins Handbook of Chemistry was published. Till 1843 it was grown in the fourth edition up to 9 volumes. In this edition Gmelin included the Atomtheory and devoted much more space to the increasingly important organic chemistry. The terms Ester and Ketone were introduced by Gmelin. Until his death Gmelin worked on the fifth edition of the handbook, which he has made himself worthy of the chemical information and documentation. He also established the basis for the Gmelin system, which later was named after him, for unambiguous classification of inorganic substances. At the age of 60 Gmelin suffered a first stroke, another in August 1850. In both strokes the right half of his body was hit, he was able to recover from the paralysis, but remained debilitated. In the spring of 1851 Gmelin applied for his retirement, which was granted him a few months later. In the two following years he suffered increasingly from the effects of a brain illness, at nearly 65 years Leopold Gmelin died on 13 April 1853 in Heidelberg and was buried at the Mountain Cemetery in Heidelberg. The grave complex is located in the department E. There also rests his wife Luise Gmelin and more family members. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Leopold Gmelin」の詳細全文を読む スポンサード リンク
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