фреска

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18.11.2013 (9:15) Естественные науки >> Физика
Физика отвечает на вопрос, почему темнеют древние росписи
На протяжении многих веков сульфид ртути был лучшим красным пигментом, среди использовавшихся художниками. Проведенные недавно группой ученых из Италии и Бельгии эксперименты и расчеты показывают, какие именно химические реакции ответственны за то, что со временем этот ...>>


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