Impurities in silicon metals mainly include iron, aluminum, and calcium. Silicon metal is used as a feedstock in the production of silicones, aluminum alloys, and semiconductor materials. Based on its ...
Sometimes, people with iron deficiency anemia don't respond to treatment with iron supplementation and may go months to years with little to no improvement in anemia. This can happen if the dose is ...
DAMASCUS, Syria (AP) — The Syrian government collapsed early Sunday, falling to a lightning rebel offensive that seized control of the capital of Damascus and sent crowds into the streets to celebrate ...