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• Hugo_von_Mohl abstract "Hugo von Mohl (8 April 1805 – 1 April 1872) was a German botanist from Stuttgart.He was a son of the Württemberg statesman Benjamin Ferdinand von Mohl (1766–1845), the family being connected on both sides with the higher class of state officials of Württemberg. While a pupil at the gymnasium he pursued botany and mineralogy in his leisure time, till in 1823 he entered the University of Tübingen. After graduating with distinction in medicine he went to Munich, where he met a distinguished circle of botanists, and found ample material for research.This seems to have determined his career as a botanist, and he started in 1828 those anatomical investigations which continued till his death. In 1832 he was appointed professor of botany in Tübingen, a post which he never left. Unmarried, his pleasures were in his laboratory and library, and in perfecting optical apparatus and microscopic preparations, for which he showed extraordinary manual skill. He was largely a self-taught botanist from boyhood, and, little influenced in his opinions even by his teachers, preserved always his independence of view on scientific questions. He received many honours during his lifetime, and was elected foreign fellow of the Royal Society in 1868.Mohl's writings cover a period of forty-four years; the most notable of them were republished in 1845 in a volume entitled Vermischte Schriften (For lists of his works see Botanische Zeitung, 1872, p. 576, and Royal Soc. Catalogue, 1870, vol. iv.) They dealt with a variety of subjects, but chiefly with the structure of the higher forms, including both rough anatomy and minute histology. The word protoplasm was his suggestion; the nucleus had already been recognized by R. Brown and others; but Mohl showed in 1844 that the protoplasm is the source of those movements which at that time excited so much attention.He recognized under the name of primordial utricle the protoplasmic lining of the vacuolated cell, and first described the behaviour of the protoplasm in cell division. These and other observations led to the overthrow of Schleiden's theory of origin of cells by free-cell-formation. His contributions to knowledge of the cell-wall were no less remarkable; he held the view now generally adopted of growth of cell-wall by apposition. He first explained the true nature of pits, and showed the cellular origin of vessels and of fibrous cells; he was, in fact, the true founder of the cell theory. Clearly the author of such researches was the man to collect into one volume the theory of cell-formation, and this he did in his treatise Die vegetabilische Zelle (1851), a short work translated into English (Ray Society, 1852).Mohl's early investigations on the structure of palms, of cycads, and of tree ferns permanently laid the foundation of all later knowledge of this subject: so also his work on Isoetes (1840). His later anatomical work was chiefly on the stems of dicotyledons and gymnosperms; in his observations on cork and bark he first explained the formation and origin of different types of bark, and corrected errors relating to lenticels. Following on his early demonstration of the origin of stomata (1838), he wrote a classical paper on their opening and closing (1850).In 1843 he started the weekly Botanische Zeitung in conjunction with Schlechtendal, which he edited jointly till his death. He was never a great writer of comprehensive works; no text-book exists in his name, and it would indeed appear from his withdrawal from co-operation in Hofmeister's Handbuch that he had a distaste for such efforts. In 1850, he was elected a foreign member of the Royal Swedish Academy of Sciences. In his latter years his productive activity fell off, doubtless through failing health, and he died suddenly at Tübingen on 1 April 1872.".
• Hugo_von_Mohl birthDate "1805-04-08".
• Hugo_von_Mohl birthPlace Stuttgart.
• Hugo_von_Mohl birthYear "1805".
• Hugo_von_Mohl deathDate "1872-04-01".
• Hugo_von_Mohl deathPlace T%C3%BCbingen.
• Hugo_von_Mohl deathYear "1872".
• Hugo_von_Mohl field Botany.
• Hugo_von_Mohl nationality Germany.
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• Hugo_von_Mohl authorAbbrevBot "Mohl".
• Hugo_von_Mohl birthDate "1805-04-08".
• Hugo_von_Mohl birthPlace Stuttgart.
• Hugo_von_Mohl caption "Hugo von Mohl".
• Hugo_von_Mohl dateOfBirth "1805-04-08".
• Hugo_von_Mohl dateOfDeath "1872-04-01".
• Hugo_von_Mohl deathDate "1872-04-01".
• Hugo_von_Mohl deathPlace Tübingen.
• Hugo_von_Mohl field Botany.
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• Hugo_von_Mohl name "Hugo von Mohl".
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• Hugo_von_Mohl nationality Germany.
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• Hugo_von_Mohl description "German botanist".
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• Hugo_von_Mohl comment "Hugo von Mohl (8 April 1805 – 1 April 1872) was a German botanist from Stuttgart.He was a son of the Württemberg statesman Benjamin Ferdinand von Mohl (1766–1845), the family being connected on both sides with the higher class of state officials of Württemberg. While a pupil at the gymnasium he pursued botany and mineralogy in his leisure time, till in 1823 he entered the University of Tübingen.".
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