eChapter Name: Veterinary Biochemistry
9789389992700
eBook Name: VETERINARY SCIENCES AND ANIMAL HUSBANDRY: A KNOWLEDGE BOOK
by Koushlesh Ranjan, R.A. Siddique, M.K. Bharti, Gulab Chandra, R.K. Singh
1665 Robert Hooke had successfully invented the microscope. Because of this discovery, Robert Hooke was the first one to have a close look of a cell appears to be. His description of these cells was published in Micrographia. However, the cell walls observed by Hooke gave no indication of the nucleus and other organelles found in most living cells.
1674 Anton van Leeuwenhoek witnessed a live cell (plant) under a microscope.
1775 Antoine Lavoisier first proposed a mechanism for photosynthesis, a process wherein plants plants take in carbon dioxide and release oxygen. Lavoisier was also the first to investigate cell respiration in animals.
1777-83 Chemistry became dominated by the phlogiston theory, or the hypothetical principle of fire wherein all the combustible material was part composed. In this principle, burning (oxidation) was caused by liberating phlogiston, with ash as the dephlogistigated substance.
1836 The proponent of the cell theory in Biology, Theodore Schwann, proposed that the process of fermentation is solely limited to living yeast cells in 1836. Liebig did not agree to this and instead, he proposed another alternative theory of fermentation.
1856 Louis Pasteur opposed Liebig’s chemical theory. In his experiment, he showed that fermentation depends highly on the physiological functions that occur in bacteria and in living yeast cells. This work of Pasteur in 1856 received general recognition.
1860s The view on the chemistry of life highly different from the chemistry of nonliving things. During this period, the view is that the gelatinous and homogenous form of matter in organisms or more commonly known as the protoplasm carries out all the intracellular processes. These include respiration, biosynthesis of molecules, and the breakdown of matter.