Calamine brass Calamine brass Calamine brass is brass produced by a particular alloying technique using the zinc ore calamine directly, rather than first refining it to metallic zinc. Direct zinc smelting appears to have been unknown in Europe until the mid-18th century, even though the alloyed calamine brass was in use for centuries, and metallic zinc was produced directly via reducing-atmosphere smelting in India and China from the 12th century CE onwards. Brass is an alloy of copper and zinc and, when it was first developed, methods for producing metallic zinc were unknown. Metallurgists wishing to produce brass thus used calamine (actually
Extracted Extracted Extracted, also known as Extraction in the UK, is an independent 2012 American science fiction thriller directed and written by Nir Paniry. Sasha Roiz stars as a scientist whose consciousness becomes trapped in the mind of a convict (Dominic Bogart) who volunteered to be a part of an experimental procedure. Tom, a scientist, invents a machine that can insert a person into the subconscious mind of another person. Desperate for funding to complete his prototype, he is forced to accept money from an anonymous investor. When the investor threatens to pull out, Tom reluctantly agrees to a demonstration a