China says two of its astronauts completed a nine-hour spacewalk Tuesday, a figure that beats the US-held record for the ...

It owns one of the larger deposits in the Kalahari copper belt, the 10Mt at 1.3% Cu Witvlei project which is down the road a ...

Additive applications such as use of hydraulic fracturing techniques (tight oil and shale gas formations), which require biocides to prevent corrosion and production issues that may be caused by ...