At the core of this technique is a sponge-like material made from protein fibrils derived from ... that 20 circuit boards are ...

We're after pure gold, but rock that contains gold also includes lots of other materials such as quartz, calcite, and the sulfides of other metals. Since we need to separate the gold from the rest ...

According to the new research, high-purity gold can be removed selectively from e-waste using textile adsorbents instead. These fiber-like materials, made of a chemical called polyacrylonitrile ...

The company goes through over 10 tons of gold a year in their East London site, where it produces 99.99% pure gold and then turns it into cast bars, minted bars, and coins. The refinery gets its ...

While 24-carat gold is a 100 percent pure form of gold with no trace of any other metal, the 22-carat variant has 91.67 percent pure gold along with some traces of alloyed metals like silver or ...

The crown, made entirely of pure gold, contributed to the ... The finial was again replaced in 1876 and 1940, utilizing materials such as copper with gold coating. The finial we view today is ...

As per the All India Sarafa Association, the price of 99.9% pure gold fell by Rs 1,050 and was at Rs 90,200 per 10 grams. On Tuesday, the metal had closed at Rs 91.250. Similarly, gold rate ...

Gold prices saw a decline on March 25, after hitting record highs in the beginning of the month. According to the India Bullion and Jewellers Association, gold (999 purity) was trading at around ...