Alexander Oparin
Alexander Ivanovich Oparin (Russian: Алекса́ндр Ива́нович Опарин) (March 2 [O.S. February 18] 1894, Uglich – April 21, 1980, Moscow) was a Soviet biochemist and author of the theory of the origin of life. His other major works were in fields of biochemical grounds for vegetable raw material processing and enzyme reactions in plant cells. He showed that many food production processes are based on the biocatalysis and developed foundations of the industrial biochemistry in the USSR. Cite error: A <ref> tag is missing the closing </ref> (see the help page).. In 1970, he was elected President of the International Society for the Study of the Origins of Life. On his passing on April 21, 1980, he was interred in Novodevichy Cemetery in Moscow.
Oparin became Hero of Socialist Labour in 1969, received the Lenin Prize in 1974 and was awarded the Lomonosov Gold Medal in 1979 "for outstanding achievements in biochemistry". He was also awarded five Orders of Lenin.
Theory of the origin of life
Oparin sometimes is called "Darwin of the 20th century."[citation needed] Although he began by reviewing the various panspermia theories, he was primarily interested in how life initially began. As early as 1922, he asserted the following tenets:
1. There is no fundamental difference between a living organism and lifeless matter. The complex combination of manifestations and properties so characteristic of life must have arisen in the process of the evolution of matter.
2. Taking into account the recent discovery of methane in the atmospheres of Jupiter and the other giant planets, Oparin postulated that the infant Earth had possessed a strongly reducing atmosphere, containing methane, ammonia, hydrogen, and water vapor. In his opinion, these were the raw materials for the evolution of life.
3. At first there were the simple solutions of organic substances, the behavior of which was governed by the properties of their component atoms and the arrangement of those atoms in the molecular structure. But gradually, as the result of growth and increased complexity of the molecules, new properties have come into being and a new colloidal-chemical order was imposed on the more simple organic chemical relations. These newer properties were determined by the spatial arrangement and mutual relationship of the molecules.
4. In this process biological orderliness already comes into prominence. Competition, speed of growth, struggle for existence and, finally, natural selection determined such a form of material organization which is characteristic of living things of the present time.
Oparin outlined a way in which basic organic chemicals might form into microscopic localized systems - possible precursors of cells - from which primitive living things could develop. He cited the work done by de Jong on coacervates and other experimental studies, including his own, into organic chemicals which, in solution, may spontaneously form droplets and layers. Oparin suggested that different types of coacervates might have formed in the Earth's primordial ocean and, subsequently, been subject to a selection process leading eventually to life.
While Oparin was unable to do extensive experiments to investigate any of these ideas, scientists were later able to. In 1953, for example, Stanley Miller performed what is perhaps the first experiment to investigate whether chemical self-organization would have been possible on the early earth. He showed that by mixing many of the components of a reducing atmosphere, it was possible to synthesize familiar organic compounds such as amino acids that were more complex than the molecules that were present at the beginning of the experiment.
Bibliography and references
- Oparin, A. I. The Origin of Life. Moscow: Moscow Worker publisher, 1924 (in Russian)
- English translation: Oparin, A. I. The Origin of Life. New York: Dover (1952) (first translation published in 1938).
- Oparin, A., Fesenkov, V. Life in the Universe. Moscow: USSR Academy of Sciences publisher, 3rd edition, 1956 (in Russian)
- English translation: Oparin, A., and V. Fesenkov. Life in the Universe. New York: Twayne Publishers (1961).
Major works
- "The External Factors in Enzyme Interactions Within a Plant Cell"
- "The Origin of Life on Earth"
- "Life, Its Nature, Origin and Evolution"
- "The History of the Theory of Genesis and Evolution of Life"
Footnotes