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...
Skolkovo resident SEMAT has secured 50 million rubles in investment from Russian-Czech company MTE Group to research electrical discharge machining, a deal signed at Startup Village. Karavaev and Volkov, in light suits, during the signing. Photo: sk.ru...