New shade of grey: Pompeii study reveals ancient Roman artists' pigment techniques
A recent study offers new insights into the pigments used by ancient Roman artists in Pompeii, revealing how they mixed raw ...
Voyageur Pharmaceuticals Advances Frances Creek Project, Paving the Way for a Secure ...
Voyageur Pharmaceuticals Ltd. (TSX.V:VM) (OTC Pink:VYYRF) ("Voyageur" or the "Company") is pleased to announce the commencement of the Frances Creek barium contrast media project, powered by a ...
来自MSN7 个月
Scientists created the world's whitest paint. It could eliminate the need for air conditioning.
Two features make this paint ultra-white: a very high concentration of a chemical compound called barium sulfate – also used in photo paper and cosmetics – and different particle sizes of ...
BBC2 年
Testing for negatively charged ions
Explain why, in a test for sulfate ions, the sample is acidified with hydrochloric acid first. Carbonate ions also produce a white precipitate with barium chloride solution. The acid reacts with ...