Nikolai Cholodny Explained

Mykola Hryhorovych Kholodny
Birth Date:22 June 1882
Birth Place:Tambov, Russian Empire
Death Place:Kyiv, USSR
Nationality:Ukrainian
Known For:Cholodny–Went model
Occupation:Microbiologist

Mykola Hryhorovych Kholodny (Ukrainian: Микола Григорович Холодний ; 22 June 1882 – 4 May 1953) was an influential microbiologist who worked at the University of Kyiv, Ukraine in the USSR during the 1930s.

He is known for the Cholodny–Went model, which he developed independently with Frits Warmolt Went of the California Institute of Technology.Despite being associated with the same theory, the two men never actually met.[1]

Cholodny worked in the A.V. Fomin Botanical Garden, attached to the University of Kyiv.[2] He was one of the pioneers of the concept that microbes adhere to surfaces, using the technique of first placing glass slides in earth for a measured time period,then using a microscope to examine the slides.[3] [4] The Prokaryote Leptothrix cholodnii is named after him.[5] In 1927 Cholodny proposed that the cells of the coleoptile are first polarized under the influence of uneven exposure to light, so growth hormone can diffuse more rapidly towards the side in the shade than in any other direction.[6] Went reached the same conclusion in 1928, and the two scientists' names have been attached to the controversial Cholodny–Went theory.[7]

Bibliography

Selected works include:[8]

In 1937 N. G. Cholodny and E. Ch. Sankewitsch published an article on Influence of weak electric currents upon the growth of the coleoptile in Plant Physiology.[9] The same year he published an article on Charles Darwin and the modern theory of tropisms in Science magazine.[10]

Notes and References

  1. Reflections and Speculations . F.W, Went . 1974 . Annual Review of Plant Physiology . 10.1146/annurev.pp.25.060174.000245 . 25 . 1–27.
  2. Web site: About Botanical Garden . O.V. Fomin Botanical Garden . 2012-06-17.
  3. Web site: Claude E. Zobell – his life and contributions to biofilm microbiology . Hilary M. Lappin-Scott . 1999 . Proceedings of the 8th International Symposium on Microbial Ecology . 2012-06-17.
  4. Canadian Journal of Microbiology . 2001 . 47 . 7 . 601–607 . Adequacy of in situ glass slides and direct sand extractions to assess the microbiota within sand columns used for drinking water treatment . Jonas Långmark . Nicholas J Ashbolt . Ulrich Szewzyk . Thor Axel Stenström . 10.1139/w01-052 . 11547879 .
  5. Web site: List of Prokaryotic names with Standing in Nomenclature - Genus Leptothrix . J.P. Euzéby . 2012-06-17 .
  6. Encyclopedia: Le phototropisme • Chez les végétaux supérieurs . Encyclopædia Universalis France S.A . 2012-06-17.
  7. Growth Distribution during Phototropism of Arabidopsis thaliana Seedlings . Plant Physiology . 1993 . 103 . 157–163 . Vladimir Orbovik . Kenneth I. Poff . amp . 2012-06-17 . 1 . 10.1104/pp.103.1.157. 12231922 . 158958.
  8. Web site: Cholodny, N. . Worldcat . 2012-06-17.
  9. Plant Physiology . April 1937 . 12 . 385–408 . Influence of weak electric currents upon the growth of the coleoptile . N. G. Cholodny . E. Ch. Sankewitsch . amp . 439299 . 16653418 . 2 . 10.1104/pp.12.2.385.
  10. Charles Darwin and the modern theory of tropisms . Cholodny . Science . 19 November 1937. 468 . 86 . 10.1126/science.86.2238.468 . 2238 . 17815459. 1937Sci....86..468C .

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