LOUIS PASTEUR CONTRIBUTION SERIES

Pasteur thus disproved the centuries old doctrine of spontaneous generation and was awarded the Alhumbert Prize in 1862 for his effort. Nothing grew in the broths unless the flasks were broken open, showing that living organisms came from outside and were not spontaneously generated. Louis Pasteur conducted an experiment in which he sterilized beef broths by boiling them in swan-neck flasks that contained a filter to prevent all particles from passing through. Spontaneous generation was a prevailing notion during PasteurвЂ™s time by which simple life-forms were spontaneously generated from non-living matter. #5 Louis Pasteur decisively disproved spontaneous generation Diagram giving an overview of the Pasteurization process Pasteurization continues to be used widely in the dairy industry and other food processing industries to achieve food preservation and food safety. Soon the process was also applied to milk and beer. Pasteurization was first used to save the French wine industries from the problem of contamination. In pasteurization, liquids such as milk are heated to a temperature between 60 and 100 вЊ to kill microorganisms present within them that cause them to be spoiled. #4 He invented the method of pasteurizationДЄfter studying the harmful effects of microbes on foodstuffs, Louis Pasteur invented the pasteurization process in 1862. Through further research, Pasteur showed that the growth of micro-organisms was responsible for spoiling beverages, such as beer, wine and milk. In 1858, Pasteur demonstrated that fermentation was a process involving the action of living yeast and that fermentation could also produce lactic acid, which makes wines sour. At the time it was thought to be caused by yeast dying and decomposing.

LOUIS PASTEUR CONTRIBUTION SERIES

In the 1850s and 1860s, Louis Pasteur showed that fermentation was a process initiated by living organisms in a series of investigations. #3 He showed that fermentation was caused due to living organisms 2D Fischer Representation of the two enantiomeric isomers of tartaric acid His work in this area, which continued for a further 10 years, is considered by some historians as his вЂњmost profound and most original contribution to scienceвЂќ. Louis Pasteur thus laid the foundation of stereochemistry, a sub-discipline of chemistry which involves the study of the spatial arrangement of atoms and molecules. This was the first time anyone had demonstrated molecular chirality and also the first explanation of optical isomerism. Louis PasteurвЂ™s determination of the problem concerning tartaric acid in 1848 established that just studying the composition of a compound was not enough to understand how a chemical behaves as its structure and shape was also important. #2 Louis Pasteur was the first stereochemist Diagram of Dextro and Levorotary forms of tartrate Thus Louis Pasteur discovered the existence of molecular asymmetry. When the two crystals were together in equal quantity in a solution, the effect of rotation was cancelled. When polarized light was passed through each, both solutions rotated it, but in opposite directions. Louis Pasteur studied tartaric acid and noticed that it consisted of two different types of tiny crystals which were mirror images of each other. There was a mystery surrounding the compound as its solution derived from living things rotated the plane of polarization of light but that derived from chemical synthesis had no such effect even though the compounds displayed identical chemical properties. The property of tartaric acid to rotate polarized light was first observed by French physicist Jean-Baptiste Biot in 1832. #1 He discovered the existence of molecular asymmetry

Louis pasteur contribution