Louis Pasteur KM

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by kaleyLmyrick
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Scientific Biographies
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Louis Pasteur KM

Louis Pasteur By: Kaley Myrick

Info about Louis Pasteur: -Born on December 27, 1822-Place of birth: Dole, France-He grew up in the town of Arbois, and his father, Jean- Joseph Pasteur, was a tanner and a sergeant major decorated with the Legion of Honor during the Napoleonic Wars. -Louis was skilled at drawing and painting. He earned his bachelor of arts degree and a bachelor of science degree at the Royal College, of Besancon and a doctorate from the Ecole Normale in Paris.

Family Life:-He spent several years researching and teaching at Dijon Lycee. In 1848, he became a professer of chemistry at the University of Stasbourg, where he met Marie Lautent. They were married on May 29, 1849 and had five children, though only two survived childhood.

His Discovery:-He discovered that microbes were responsible for souring alcohol and came up with the process of pasteurization, where bacteria is destroyed by heating beverages and then allowing them to cool. His work in germ theory also led him to create vaccinations for anthrax and rabies.

His observation of paratartic acid:-In 1849, he was attempting to resolve a problem concerning the nature of tartaric acid. Scientists were using the rotation of polarized light as a means for studying crystals. When polarized light is passed through a solution of dissolved tartaric acid, the angle of the plane of light is rotated.

More info about his observation of paratartic acid:-He observed that another compound called paratartic acid, also found in wine sediments, had the same composition as tartaric acid.-Most scientists assumed the two compounds were identical. But, Pasteur observed that paratartic acid did not rotate plane-polarized light.-He examined that although the two compounds had the same chemical composition, they must somehow have different structures.

Details about his observation:-He looked at the partartic acid under a microscope, he noticed that there were two different types of crystals. They instead mirror images of each other even though they looked exactly alike.-He the seperated the two crystals and made solutions of each. When the light passed through each, he discovered that both solutions rotated, but in opposite directions.-When they were in a solution together, the effect of the polarized light was canceled. -This experiment concluded that studying the composition is not enough to understand how a chemical behaves. This conclusion led to the field of stereochemistry.

Info about his life right before death:-He was partialy paralyzed in 1868, because of a severe brain stroke, but was able to continue his work. At the time of his 70th birthday, his paralysis worsened, causing his death on September 28, 1895. His remains are still located in Neo-Byzantire Crypt at the Pasteur Institue today.

His research and work at the University of Lillie:-In 1854, he was appointed professer of chemistry of the science faculty at the University of Lillie.-There, he researched finding solutions to the problems with the manufacture of alcoholic drinks. He worked with germ theory, which he did not invent. He demonstrated that organisms such as bacteria were responsible for souring wine and other drinks. -Later, he invented a process where bacteria could be removed by boiling and then cooling liquid. He the completed the first test on April 20, 1862, which became known as pasteurization.

Impact on science and history:-He helped save the silk industry in 1865, by proving that microbes were attacking healthy silkworm eggs, causing an unknown disease.-He then discovered that the disease would go away if the microbes were eliminated.-Later, he developed a method to prevent their contamination and it was soon used by silk producers throughout the world.

Louis Pasteur's impact on science:-His first vaccine discover was in 1879.-He discovered a disease called chicken cholera.-He accidently exposed chickens to the attenuated form of a culture, demonstrating that they became resistant to the actual virus.-He went on to extend his germ theory to develop causes and vaccinations for diseases such as anthrax, cholera, TB and smallpox.

"Man saves young boy from a rabid dog bite.'-In 1873, he was elected as an associate member of the Academie Francaise, he decided to focus his efforts on the problem of rabies.-On July 6, 1885, he vaccinated Joseph Meister, a young boy who was bitten by a rabid dog. -His success made him famous. This began an international fundraising campaign to build the Pasteur Institute in Paris.


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