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Apr 3, 2024 · Nathanael Pringsheim (born November 30, 1823, Wziesko, Silesia [now in Poland]—died October 6, 1894, Berlin, Germany) was a botanist whose contributions to the study of algae made him one of the founders of the science of algology. Pringsheim studied at various universities, including the University of Berlin, from which he received a Ph.D ...
- The Editors of Encyclopaedia Britannica
Nathanael Pringsheim was born at Landsberg, Prussian Silesia, and studied at the universities of Breslau, Leipzig, and Berlin successively. [1] He graduated in 1848 as doctor of philosophy with the thesis De forma et incremento stratorum crassiorum in plantarum cellula, and rapidly became a leader in the great botanical renaissance of the 19th ...
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The discovery of the mammalian ovum brought the realization that human reproduction occurred in the same way as did that of other animals. In the second half of the nineteenth century, microscopic techniques improved enough to allow scientists to observe the nuclei of cells. Turning this new ability to the study of sexual reproduction, they were ab...
From ancient times, people have understood that traits may be inherited, and bred animals in order to reproduce desirable attributes. But they had no idea of how heredity actually worked. Aristotle (384-322 B.C.) and other Greek philosophers believed that hereditary traits were passed in the blood, and we still use terms like "blue-blood" and "bloo...
It was by no means obvious to early natural historians that eggs had anything to do with the reproduction of humans and other mammals. Many types of animals lay their eggs, but in mammals, fertilization and embryonic development take place internally. The first known claim to have observed the human ovum was made by the Dutch physician Reinier de G...
Farley, John. Gametes and Spores: Ideas About SexualReproduction, 1750-1914. Baltimore, MD: Johns HopkinsUniversity Press, 1982. Harris, Henry. The Birth of the Cell. New Haven, CT: Yale UniversityPress, 1999. Pinto-Correja, Clara. The Ovary of Eve: Egg and Sperm andPreformation. Chicago: University of ChicagoPress, 1997.
May 11, 2018 · PRINGSHEIM, NATHANAEL (b.Wziesko, Silesia, 30 November 1823; d.Berlin, Germany, 6 October 1894) botany, plant physiology.. Pringsheim belonged to that group of young German botanists—including Ferdinand Cohn, Hofmeister, and Mohl—who revolutionized the science during the middle years of the nineteenth century by shifting attention from collection and taxonomy to the dynamics of cell ...
Nathanael Pringsheim1823-1894 German botanist who investigated reproduction in plants. Pringsheim was among the first to observe sexual reproduction in algae. He showed that these tiny organisms release sperm and egg cells into the water, where they combine. He also described the alternation of generations, or reproduction by spores, in mosses.
May 21, 2024 · Pringsheim, who was born at Wziesko (now in Poland), studied medicine at the universities of Breslau and Leipzig. However, his interest turned to natural science when he moved to the University of Berlin; he gained his PhD in 1848 with a thesis on the growth and thickness of plant cell walls. In 1864 he was appointed professor of botany at the ...
burger, a student of Pringsheim and a prominent cytologist, who directed his studies toward heredity and evolution of plants through his investigations of cell division, the nucleus, and chromosomes. Pringsheim's own outstanding work entitles him to be included in this list of leaders in his century. Nathanael Pringsheim (1823-1894) was born in
