Sentences with phrase «reactive nitrogen from»

Export of reactive nitrogen from coal ‐ fired power plants in the U.S.: Estimates from a plume ‐ in ‐ grid modeling study

In addition, particles of these clouds may descend and withdraw reactive nitrogen from the chlorine - activated layer — active chlorine is one of the substances mainly responsible for ozone destruction.

Measurements from the winter of 1994 — 95 indicating removal of total reactive nitrogen from the Arctic stratosphere by particle sedimentation were used to constrain a microphysical model.

Not exact matches

«Myeloid - derived suppressor cells (MDSCs) produce reactive nitrogen radicals that alter the receptors on the surface of the tumour to hide it from cytotoxic lymphocytes that kill tumour cells.

NOx gases represent some of the most reactive gases produced from diesel combustion and other fossil fuels, but the emissions limits for nitrogen dioxide are regularly exceeded, especially in urban areas.

So where are these reactive nitrogen species coming from?

On Pluto, ultraviolet light from the sun breaks apart gas molecules like nitrogen and methane to create reactive ions.

The mitochondria in our cells are responsible for releasing energy from the molecules in our food, but they also unleash electron - stealing free radicals like reactive oxygen and reactive nitrogen species.

In order of reduction, they call for controlling nitrogen oxide emissions from the burning of fossil fuels using «maximum feasible reductions,» which could reduce reactive nitrogen emissions by 55 billion pounds of a year; increasing the efficiency of fertilizing crops (33 billion pounds a year); improved animal management policies (33 billion pounds); and ensuring that at least half the world's urban population has sewage treatment (11 billion pounds).

A paragraph from a 2007 United Nations - sponsored report provides a depressing introduction: «In the air, (reactive nitrogen) can contribute to higher levels of ozone in the lower atmosphere, causing respiratory ailments and damaging vegetation.

Human emissions of reactive sulfur and nitrogen, derived from fossil fuel combustion and agriculture, have led to increased deposition of strong acids (HNO3 and H2SO4) and bases (NH3) to the ocean, hence affecting seawater pH (Doney et al. 2007).