Density gradient ultracentrifugation (DGUC), as an effective method for the purification of nanomaterials, has attracted tremendou attentions of researchers. A recent review was reported by Science ...

Isolation of viable mononuclear and polymorphonuclear cells from blood serves as the starting point for a wide spectrum of immunology and cell biology studies. Unlike red blood cells and platelets, ...

Separation techniques and principles that were used by early gold prospectors are still used today in the mining industry. Some of these methods, transferred to the recycling industry, have ...

The U.S. steel industry produces about 100 million tons annually. In 1994, this constituted 12.6 percent of world production. In addition, the United States imports about 25 million tons of steel each ...