Preservative

(1889) Swiss organic chemist Paul Karrer is born. He is remembered for his research on vitamins.
(1971) President of Haiti François Duvalier passes away. Along with his presidency he is remembered for his work as a physician, attempting to fight diseases like malaria.
(1980) Soviet chemist Alexander Ivanovich Oparin passes away. Along with his theory on the origin of life, he is known for his work in enzymes.

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