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Because he was influenced by Matthias Schleiden’s cell theory and Hugo von Mohl’s description of protoplasm in plant cells, he began to focus on lower plants----microscopic organisms. His tedious observations on the unicellular algae Protococcus pulvialis led to his early fame.
algae. bacteria. endospore. fungus. taxonomy. Ferdinand Cohn (born January 24, 1828, Breslau, Silesia, Prussia [now Wrocław, Poland]—died June 25, 1898, Breslau) was a German naturalist and botanist known for his studies of algae, bacteria, and fungi. He is considered one of the founders of bacteriology. Cohn was born in the ghetto of ...
- The Editors of Encyclopaedia Britannica
Jul 1, 2000 · Ferdinand Cohn (1828–1898) investigated the unicellular algae Protococcus pluvialis Kützing and Stephanosphaera pluvialis and elucidated the different stages of development and the difference between vegetative and generative multiplication of swarm cells (macrogonidia and isogametes) .
- Gerhart Drews
- 2000
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Ferdinand Julius Cohn(1828-1898) is recognized as one of the founders of modern bacteriology. He contributed to the creation of this discipline in two important ways. First, he invented a new system for classifying bacteria, which provided microbiologists with a more standardized nomenclature with which to work. Secondly, his drive to understand th...
The discipline of bacteriology originated with the recognition that bacteria are organisms in their own right—that they are different from algae, fungi, and other single-celled microorganisms. This idea is central to Cohn's belief in the constancy of bacterial species and his creation of an extensive classification system for microorganisms, in whi...
The notion, promoted by Cohn and others, that bacterial species were constant, led to methods of growing pure cultures. Pasteur was using pure cultures to support his claims that different types of fermentations were caused by specific microorganisms. German physician Robert Koch (1843-1910) would later apply similar reasoning in developing the ger...
Bulloch, William. The History of Bacteriology. London: Oxford UniversityPress, 1960. Cohn, Ferdinand J. Bacteria: The Smallest of Living Organisms. Baltimore, MD: Johns HopkinsUniversity Press, 1939. Vandervliet, Glenn. Microbiology and the Spontaneous Generation Debate During the 1870s.Kansas: Coronado Press, 1971.
Cohn was a prolific writer, leaving behind over 150 papers, essays, and books. [1] In the 1850s he studied the growth and division of plant cells. In 1855 he produced papers on the sexuality of Sphaeroplea annulina and later Volvox globator. In the 1860s he studied plant physiology in several different aspects.
Jul 19, 2022 · Robert Hooke was the first to use a microscope to observe living things. Hooke’s 1665 book, Micrographia, contained descriptions of plant cells. Before Van Leeuwenhoek’s discovery of microorganisms in 1675, it had been a mystery why grapes could be turned into wine, milk into cheese, or why food would spoil.
Jul 1, 2000 · Ferdinand Cohn (1828–1898), a pioneer in the developmental biology of lower plants, considerably promoted the taxonomy and physiology of bacteria, discovered the heat-resistant endospores of bacilli, and was active in applied microbiology. Introduction. Progress in science has never been a continuous process.
