Thimann, Kenneth V(ivian)

Thimann, Kenneth V(ivian)
born Aug. 5, 1904, Ashford, Kent, Eng.
died Jan. 15, 1997, Haverford, Pa., U.S.

British-born U.S. plant physiologist.

He received his Ph.D. from Imperial College in London. In 1934 he obtained and isolated pure auxin, an important plant-growth hormone and, with several coworkers, proved that auxin promotes cell elongation, formation of roots, and growth of buds, discoveries that led to the development of a widely used synthetic auxin, 2,4-D. Use of this and similar chemicals can prevent the premature falling of fruit and stimulate cut stems to grow abundant roots; because high concentrations of auxins are toxic to most plants, synthetic auxins are also effective weed killers.

* * *

Universalium. 2010.

Игры ⚽ Нужен реферат?

Look at other dictionaries:

  • Thimann, Kenneth V(ivian) — (5 ago. 1904, Ashford, Kent, Inglaterra–15 ene. 1997, Haverford, Pa., EE.UU.). Fitofisiólogo estadounidense nacido en Inglaterra. Obtuvo un Ph.D. en el Imperial College de Londres. En 1934 obtuvo y aisló auxina pura, una importante hormona de… …   Enciclopedia Universal

  • Kenneth — (as used in expressions) Arrow, Kenneth J(oseph) Burns, Ken(neth Lauren) Clark, Kenneth (Mackenzie), barón Galbraith, John Kenneth Grahame, Kenneth George Kenneth Griffey, Jr. Hines, Earl (Kenneth) Reginald Kenneth Dwight Kaunda, Kenneth (David)… …   Enciclopedia Universal

  • Vivian — vivián. adj. El Salv., Hond. y Nic. Dicho de una persona: aprovechada (ǁ que saca beneficio sin escrúpulos). U. t. c. s. * * * (as used in expressions) Jay Vivian Chambers Vivian Mary Hartley Richards, (Isaac) Vivian …   Enciclopedia Universal

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”