The English encyclopedia Allmultimedia.org will be launched in two phases.
The final launch of the Allmultimedia.org will take place on February 24, 2026
(shortly after the 2026 Winter Olympics).


Dovolená : 23. prosinec 2025 — 29. prosinec 2025
Holidays : December 23, 2025 — December 29, 2025

Soubor:Rareearthoxides.jpg

Z Multimediaexpo.cz

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.

Historie souboru

Kliknutím na datum a čas se zobrazí tehdejší verze souboru.

Datum a časNáhledRozměryUživatelKomentář
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)

Na soubor odkazuje tato stránka: