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Jan 1, 1577
Jean Baptiste van Helmont
"Jean Baptiste van Helmont was an early modern Flemish Chemist " who discovered the idea of spontaneous generation. Spontaneous Generation is "The supposed production of living organisms from nonliving matter." Examples of spontaneous generation are: -When you place a dirty rag or shirt in an open pot or barrel with grains, mice will appear. -If you kill a bull and bury it in an upright position so the bull's horns stick out of the ground, after a month, bees will fly out of the dead bull. -
Hans and Zacharias Jansen
Hans and Zacharias Jansen, brothers, "produced the first compound microscope by combining two convex lenses within a tube."
(Couldn't find a picture of Hans) -
Robert Hooke
Robert Hooke discovered the cellular composition of cork and created the word "cell". -
Francesco Redi
Francesco Redi was an Italian physician, naturalist, and poet who was able to "disprove the theory that maggots could be spontaneously generated from meat using a controlled experiment." "Francesco took eight jars, placed meat in all the jars, but covered four of the jars with muslin. Maggots developed in the open jars but did not develop in the muslin-covered jars" -
Anton van Leewenhoek
Anton van Leewenhoek was a Dutch tradesman and scientist from Delft, Netherlands. He was often called "the Father of Microbiology" and was considered the first microbiologist. He discovered "animalcules". Animalcules are microscopic animals. -
Lazzaro Spallanzani
Lazzaro Spallanzani was an Italian Catholic priest, biologist and physiologist "preformed experiments on soup in sealed containers from 1765-67 and proved the micro-organisms that spoiled the soup were air-born" which is more proof that cells can only reproduce like-cells. -
Rene Dutrochet
Rene Dutrochet was a French physicist who discovered and named the phenomenon of osmosis. He was also the first to recognize how important the green pigment was in the use of carbon dioxide by plant cells. -
Matthias Schleiden
Matthias Schleiden, a German botanist and co-founder of the cell theory, discovered the plants were made up of cells. -
Theodor Schwann
Theodor Schwann, a German physiologist, discovered that animals were made up of cells. He "observed cells in all samples of animal tissue, therefore expanding Schleiden’s hypothesis to include animals." -
Rudolf Virchow
Rudolf Virchow, a German doctor, anthropologist, pathologist, prehistorian, biologist and politician, stated that all living things come from other living things by cells. -
Louis Pasteur
Louis Pasteur was a French chemist and microbiologist who did additional experiments on soup in the mid-1860s employing filtered air and flasks with straight necks and long S-shaped necks.
The flasks allowed air to come in, but it trapped dust and microbes. No growth occured even after a number of days. -
Ernst Ruska
Ernst Ruska, a German engineer designed and built the first electron microscope. Electron microscopes used electron waves, instead of light waves, to magnify a microscopic specimen. -
Sources
http://ruska.nobmer.com/1.htm
http://www.britannica.com/EBchecked/topic/174678/Henri-Dutrochet
http://www.mmu.k12.vt.us/teachers/.../spontaneous%20generation-km.ppt
http://www.scientus.org/Redi-Galileo.html
http://www.microscopemaster.com/cell-theory.html
http://eclipse.cps.k12.va.us/Schools/OSM/theory.htm
