Soubor:Rareearthoxides.jpg

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Fotografie + Description:

  • English: These rare-earth oxides are used as tracers to determine which parts of a watershed are eroding. Clockwise from top center: praseodymium, cerium, lanthanum, neodymium, samarium, and gadolinium.
  • Date:
  • Source: http://www.ars.usda.gov/is/graphics/photos/jun05/d115-1.htm
  • Author: Peggy Greb, US department of agriculture

+ pochází z Wikimedia Commons, kde má status – This image is in the public domain because it contains materials that originally came from the Agricultural Research Service, the research agency of the United States Department of Agriculture.

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současná23. 7. 2019, 09:01Náhled verze z 23. 7. 2019, 09:011 200×780 (573 kB)Sysop (diskuse | příspěvky) (Fotografie + Description: * English: These rare-earth oxides are used as tracers to determine which parts of a watershed are eroding. Clockwise from top center: praseodymium, cerium, lanthanum, neodymium, samarium, and gadolinium. * Date: * Source: htt)

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