Chinese investors are to spend $30 million on a plant in the country’s northeast that will use cutting-edge technology devised by Risilica, a resident of the Skolkovo Foundation, to turn by-products of rice farming into amorphous silica. An estimated...
Purifying gold is a dirty business. After extraction, the precious metal - rarely found in its unadulterated form and usually mixed in with silver in natural deposits - must be dissolved in acid before electrolysis produces pure gold. The procedure is known...