Figure 1. These emeralds from Musakashi, Zambia, range from 0.57 to 4.85 ct. The rough samples were polished with one window on each. The faceted sample measures 6.29 × 5.35 × 3.53 mm and weighs 0.97 ...

An assessment of the sulphur limit carried out by the Department of Environment this year, said there was already widespread non-compliance with the existing sulphur requirements. Picture: ...

Architecture reviews provide information about the status of software systems and identify risks. There are quick, meaningful ...

UNAM-Institute of Materials Science and Nanotechnology, Bilkent University, Ankara 06800, Turkey ...

The international community has a golden opportunity to start reining in the escalating, mostly ignored global burden of chronic kidney disease. The genetic bases of the seven pairs of contrasting ...

The figure shows a ribbon diagram of the kinase MEK1 (Protein Data Bank code 3DV3) in complex with ATP/Mg 2+ and an allosteric inhibitor 38. The inhibitor is shown in 'ball and stick' binding ...

Fireworks are expected when old rivals Ronnie O’Sullivan and Ali Carter lock horns in the first round of the World Championship on Tuesday. The last time these two players met at the Crucible ...