Carbon dioxide surface, warming the surface and the lower atmosphere. Less energy reaches the upper atmosphere, which is therefore cooler because of this absorption. Increases in atmospheric concentrations of and other long-lived greenhouse gases such as methane, nitrous oxide and ozone have correspondingly strengthened their absorption and emission of infrared radiation, causing the rise in average global temperature since the mid-20th century. Carbon dioxide is of greatest concern because it exerts a larger overall warming influence than all of these other gases combined and because it has a long atmospheric lifetime (hundreds to thousands of years). Not only do increasing carbon dioxide
Nitrous-oxide reductase competent unit. The Cu center can undergo a one-electron redox change and hence has a function similar to that in the well-known aa-type cytochrome "c" oxidases () where it serves to receive an electron from soluble cytochromes "c". Acetylene is the most specific inhibitor of nitrous-oxide reductase. Other inhibitors include azide anion, thiocyanate, carbon monoxide, iodide, and cyanide. Nitrous-oxide reductase In enzymology, a nitrous oxide reductase also known as nitrogen:acceptor oxidoreductase (NO-forming) is an enzyme that catalyzes the final step in bacterial denitrification, the reduction of nitrous oxide to dinitrogen. It plays a critical role in preventing release of a