Using the quick search there are shown up to three reports about nitrogen isotopes:
The chief culprit is fossil fuel combustion, which releases nitric oxides into the air that combine with other elements to form smog and acid rain. But it has been difficult to know precisely the exte...
Geowissenschaften |Mónica Aguilera, an engineer from the Vegetable Physiology Unit at the University of Barcelona (UB) and co-author of the study, told SINC that the natural levels of stable carbon and nitrogen isotopes...
Agrar- Forstwissenschaften |Using the fulltext-search for the word nitrogen isotopes you can set up serveral searching-options > choose search options