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Aug 1, 2021 · The works Dujardin wanted the Académie to consider with regard to his candidacy are those in which he recognized and described rhizopods as mischaracterized by d'Orbigny, the cellular material of protists “sarcode”, his studies revealing how ingested matter is processed in protists, and his critiques of Ehrenberg's polygastrica theory as ...
Jun 8, 2018 · Dujardin thus rejected Ehrenberg’s theory “with complete conviction,” finding no reason to believe that his microscope and his sight were inferior to Ehrenberg’s, especially since in several infusoria he had seen essential details which had escaped the German observer. Dujardin presented all this work in a memoir of 1835.
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Apr 16, 2016 · April 16, 2016 Arts & Culture. Man Made: A History of Synthetic Life. Science writer Philip Ball digs into myth, history, and science to untangle the roots of our fears of artificial life. by Philip Ball. The creation of a homunculus, an artificially made miniature human, from an 1899 edition of Goethe’s Faust . About SUPPORT OUR WORK.
Mar 27, 2024 · As a skilled microscopist, Dujardin carried out extensive studies of the microorganisms (infusoria) occurring in decaying matter. These led him, in 1834, to suggest the separation of a new group of protozoan animals, which he called the rhizopods (i.e. rootfeet).
Jan 13, 2010 · the nucleus and the cell wall (or membrane), relegating the cellular contents to a secondary role” (31). The lack of sub-stance in this superficial picture came under widespread attack in the mid-19th century (93). The zoologist Félix Dujardin in 1835 had already described the physicochemical properties of
Dec 5, 2016 · This article draws on Lakoff and Johnson’s theory of “ontological metaphors” to show that the cell, primordial utricle, and protoplasm can be understood as material container, object, and substance, and that these overlapping distinctions help explain the chaotic and confusing early history of cell theory.
of living cells were carried out by the whole cell protoplasm. From the start, protoplasm was a functional concept; it was for Felix Dujardin (1801-1860), who first proposed a protoplasm theory of cell structure in 1837.18 And when the protoplasm theory came to dominate cytology in the 1 850s and 1 860s, one of
