Free chlorine in a sample can react with organic compounds to ... Waters with cyanides or sulphides require a sodium hydroxide preservative to be added to ensure that hydrogen cyanide or hydrogen ...

Compounds with a chlorine or bromine moiety (e.g., halothane, isoflurane, chlorofluorocarbons) can deplete the atmospheric ozone layer, resulting in increased ultraviolet radiation reaching the earth.

If Oregon’s recent cold snap has you shivering, and the ice and snow in the forecast seem unusual, take solace. The state climatologist feels it too — even when he’s looking at data that ...