Biography felix dujardin

(b. Tours, France, 5 April 1801; d. Rennes, France, 8 April 1860)

protozoology.

Both Dujardin’s father and grandfather were skilled watchmakers, originally in Lille, and Félix, who for a time trained in the trade, seems to have acquired some of his interests—as well as his remarkable manual dexterity—from them.

With his two brothers, Dujardin attended the classes of the Collège de Tours as a day pupil. He was originally attracted to art, especially drawing and design. His interest in science was apparently first aroused by a surgeon who was a friend of the family and who lent him some books on anatomy and natural history as well as Fourcroy’s Chimie. Chemistry became for a time Dujardin’s chief interest and, using a textbook by Thénard and some basic chemical reagents, he conducted simple experiments at home. Intending to study chemistry in the laboratories of Thénard and Gay-Lussac at Paris, he began to prepare himself for the entrance examination at the École Polytechnique. He persuaded his older brother to join him in these studies—particularly mathematics—and they both presented themselves for the examination in 1818. His brother succeeded, but Dujardin failed.

Discouraged by this failure, Dujardin went to Paris to study painting in the studio of Gérard, although he did not entirely forsake his scientific studies. In order to make a living, however, he soon accepted a position as a hydraulic engineer in the city of Sedan. He was married to Clémentine Grégoire there in 1823. Still restless, he returned to Tours, where he was placed in charge of a library. He began simultaneously to teach, especially mathematics and literature, and soon achieved sufficient success to give up his duties at the library. In his leisure, he pursued scientific studies of various kinds. His earliest publication, on the Tertiary strata and fossils of the Touraine area, were valuable enough to attract the attention of Charles Lyell

When in 1826 the cit

French biologist

Félix Dujardin (5 April 1801 – 8 April 1860) was a French biologist born in Tours. He is remembered for his research on protozoans and other invertebrates.

Biography

In 1840 Dujardin was appointed professor of geology and mineralogy at the University of Toulouse, and during the following year was a professor of zoology and botany at Rennes. In regard to his educational background, Dujardin was largely self-taught, the son of a watchmaker.

Dujardin worked with microscopic animal life, and in 1834 proposed that a new group of one-celled organisms be called Rhizopoda. He denied naturalistChristian Gottfried Ehrenberg's theory that microscopic organisms were "complete organisms" similar to higher animals, specifically noting that they had specialized structures unique to single-celled organisms, which meant that the foraminiferan he was studying was not, as his contemporaries believed it to be, a mollusc. In addition to his studies of microscopic life, he did extensive research on invertebrate groups that included echinoderms, hexapods, helminths and cnidarians.

In the Foraminifera, he noticed an apparently formless life substance that he named "sarcode", later renamed protoplasm by Hugo von Mohl (1805–1872).

Dujardin remains famous for the naming, identification and the first description in 1850 of the mushroom bodies (corpora pedunculata) in the hymenopteran brain (bee, bumblebee, sphex, ant, fruitfly Drosophila melanogaster, etc.), which he postulated for the first time were the site of intelligence - he wrote that bees have "memories of places and things". This major discovery proved to be significant, as these structures are now considered the place where memory and many other behaviors are formed and processed in invertebrates. He suggested that one sign of honey bees' intelligence was their communication about flower locations, seventy-seven years before Karl von Fris

Félix Dujardin (5 April ggg1801 – 8 April 1860) was a French biologist born in Tours. He is remembered for his research on protozoans and other invertebrates.

Biography

In 1840 he was appointed professor of geology and mineralogy at the University of Toulouse, and during the following year was a professor of zoology and botany at Rennes. In regard to his educational background, Dujardin was largely self-taught, the son of a watchmaker.

Dujardin worked with microscopic animal life, and in 1834 proposed that a new group of one-celled organisms be called Rhizopoda. He denied naturalistChristian Gottfried Ehrenberg's theory that microscopic organisms were "complete organisms" similar to higher animals, specifically noting that they had specialized structures unique to single-celled organisms, which meant that foraminifera he was studying was not, as his contemporaries believed it to be, a mollusk. In addition to his studies of microscopic life, he did extensive research on invertebrate groups that included echinoderms, hexapods, helminths and cnidarians.

In the Foraminifera, he noticed an apparently formless life substance that he named "sarcode", later renamed protoplasm by Hugo von Mohl (1805–1872).

Dujardin also remains famous for the identification and the first description in 1850 of the mushroom bodies (corpora pedunculata) in the hymenopteran brain (bee, bumblebee, sphex, ant, fruitfly Drosophila melanogaster, etc.), whic