Understanding high efficiency of deep ultraviolet LEDs

Deep ultraviolet light-emitting diodes (DUV-LEDs) made from aluminium gallium nitride (AlGaN) efficiently transfer electrical energy to optical energy due to the growth of one of its bottom layers in a step-like fashion. ...

EPA hits chemical maker for not notifying on new compounds

A chemical maker's North Carolina plant may have broken federal law by failing to notify the U.S. Environmental Protection Agency before it started manufacturing and repurposing new industrial compounds, the agency said this ...

Arsenic contamination is common in Punjabi wells, study finds

While most Americans have access to safe, potable water, populations in some regions of the world are not as fortunate. In fact, the majority of some 90 million people who live in the Punjab areas of Pakistan and India drink ...

Smart mud to smooth the way for drilling wells

A model that simulates how drilling fluids, or muds, behave and influence the stability of oil wells has been developed by KAUST researchers. Their findings could inform new safety protocols and the design of novel drilling ...

Indonesia women face daily swim for clean water

Indonesian villager Mama Hasria swims upstream with about 200 empty jerry cans tied to her back, a daily trip she and other local women make to get clean water for their community on Sulawesi island.

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