Ferdinand Julius Cohn (January 24, 1828Breslau, Silesia, Prussia (now Wroclaw, Poland) - June 25, 1898 Breslau) was a biologist. At the age of 10 he suffered hearing impairment. He received a degree in Botany in 1847 at the age of nineteen. Cohn was the first to classify bacteria as plants. He also divided bacteria into four groups: Sphaerobacteria, Microbacteria, Desmobacteria, and Spirobacteria. In 1885 he received the Leeuwenhoek Medal. January 24 is the 24th day of the year in the Gregorian Calendar. ... 1828 was a leap year starting on Tuesday (see link for calendar). ... Wrocław. ... Silesia (Polish Śląsk, German Schlesien, Czech Slezsko) is a historical region in central Europe. ... The coat of arms of the Kingdom of Prussia, 1701-1918 The word Prussia (German: Preußen or Preussen, Polish: Prusy, Lithuanian: Prūsai, Latin: Borussia) has had various (often contradictory) meanings: The land of the Baltic Prussians (in what is now parts of southern Lithuania, the Kaliningrad exclave of Russia and... June 25 is the 176th day of the year (177th in leap years) in the Gregorian Calendar, with 189 days remaining. ... 1898 was a common year starting on Saturday (see link for calendar). ... Botany is the scientific study of plant life. ... 1847 was a common year starting on Friday (see link for calendar). ... Phyla/Divisions Actinobacteria Aquificae Bacteroidetes/Chlorobi Chlamydiae/Verrucomicrobia Chloroflexi Chrysiogenetes Cyanobacteria Deferribacteres Deinococcus-Thermus Dictyoglomi Fibrobacteres/Acidobacteria Firmicutes Fusobacteria Gemmatimonadetes Nitrospirae Omnibacteria Planctomycetes Proteobacteria Spirochaetes Thermodesulfobacteria Thermomicrobia Thermotogae Bacteria is also the fictional name of a warring nation under Benzino Napaloni as dictator, in the 1940 film The Great Dictator... Divisions Green algae Land plants (embryophytes) Non-vascular embryophytes Hepatophyta - liverworts Anthocerophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) Seedless vascular plants Lycopodiophyta - clubmosses Equisetophyta - horsetails Pteridophyta - true ferns Psilotophyta - whisk ferns Ophioglossophyta - adderstongues Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants... The Leeuwenhoek Medal, established in 1877 by the Dutch Royal Academy of Sciences in honor of Antoni van Leeuwenhoek, is granted every ten years to the scientist judged to have made the most significant contribution to microbiology during the preceding decade. ...
He is also known for his description of the life cycle of Bacillus and for showing that it changes from a vegetative state to an endospore when subjected to a "hostile" environment (e.g., high heat). Therefore, sterilization by boiling is not effective. It will only kill the bacteria in the vegetative state and the endospores remain viable. Species Bacillus anthracis Bacillus cereus Bacillus coagulans Paenibacillus larvae Bacillus natto Bacillus subtilis Bacillus thuringiensis The word bacillus is a descriptive term for the appearance of certain bacteria when viewed microscopically. ... An endospore is any spore that is produced within an organism (usually a bacterium). ...
Considered to be the father of modern bacteriology, FerdinandCohn (1828-1898) began his studies as a botanist and ultimately made discoveries which led to the creation of a new field of study.
Cohn was the director of the institute from the time it opened in 1869 until his death.
Cohn believed that these bodies represented a stage in the life cycle of the bacilli and suggested that they were "real spores, from which new Bacilli may develop." Since it was known that spores survived high temperature, he concluded that these must also be spores that survived the boiling and then germinated to form bacteria.
FERDINAND JULIUS COHN (1828-1898), German botanist, was born on the 24th of January 1828 at Breslau.
When it is remembered that Cohn brought out and helped R. Koch in publishing his celebrated paper on Anthrax (1876), the first clearly worked out case of a bacterial disease, the significance of his influence on bacteriology becomes apparent.
Cohn had also clear perceptions of the important bearings of Mycology and Bacteriology in infective diseases, as shown by his studies in insect-killing fungi, microscopic analysis of water, andc.
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