Comment produit-on l'acide citrique ?

Comment produit-on l'acide citrique ?

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Rediffusion - Quel est le film de science fiction le plus réaliste de l’histoire ?

Sorti en 1997 et réalisé par Andrew Niccol, "Bienvenue à Gattaca" (Gattaca en version originale) est considéré par la NASA comme le film de science-fiction le plus réaliste de tous les temps. Cette distinction repose sur la plausibilité scientifique du scénario, qui aborde un ...

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Rediffusion - Qu’est-ce que la périhélie ?

La périhélie est le point de l'orbite d'un objet céleste, comme une planète, une comète ou un astéroïde, où il se trouve au plus proche du Soleil. Le terme vient du grec peri- (autour, proche) et helios (Soleil). À l'opposé, le point le plus éloigné du Soleil est appelé aphéli ...

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