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Материалы по тегу «retinol»

795

On August 19, 1947, Dutch chemists David Adriaan van Dorp and Josef Ferdinand Arens synthesized vitamin A or retinol for the first time in history. The same year Otto Isler introduced the vitamin into production.

Author Polina Ostrizhnaya

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1709

What saints did the conquistadors pray to and why did they decide to conquer Mexico? What was the ethnic, regional, and age composition of the Conquista? 

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