Results 101 to 110 of about 461,590 (157)

Anthropogenic changes to the Holocene nitrogen cycle in Ireland. [PDF]

open access: yesSci Adv, 2018
Guiry E   +5 more
europepmc   +1 more source

Nitrogen cycle enzymology

Current Opinion in Chemical Biology, 1998
The minimal nitrogen cycle involves five reduction reactions and three oxidation reactions, each of which poses interesting problems in bioinorganic chemistry, energy transduction and protein structure/function relationships. Many of the major recent developments in this field have depended on the acquisition of protein crystal structures, including ...
openaire   +2 more sources

Nitrogen cycle

2006
Elemental nitrogen (N2) makes up 80% of the atmosphere (by volume) and represents the dominant form of atmospheric nitrogen gas. Despite its high atmospheric abundance, N2 is generally nonreactive, due to strong triple bonding between the N atoms, making much of this N2 pool unavailable to organisms.
  +4 more sources

Nitrogen Cycling

2001
In this chapter, we discuss the current understanding of internal N cycling, or the flow of N through plant and soil components, in the Niwot Ridge alpine ecosystem. We consider the internal N cycle largely as the opposing processes of uptake and incorporation of N into organic form and mineralization of N from organic to inorganic form.
Melany C. Fisk, Paul D. Brooks
openaire   +1 more source

Nitrogen Cycle Electrocatalysis

Chemical Reviews, 2009
Victor, Rosca   +3 more
openaire   +2 more sources

The Nitrogen Cycle

1981
Nitrogen has a crucial role to play in primary productivity, and indeed is the plant nutrient required in greatest quantity. In the biosphere it undergoes what is essentially a cyclical eight-electron shuttle between the most oxidized form at valence +5 (NO 3 - ) and the most reduced form at valence -3 (NH3).
W. D. Grant, P. E. Long
openaire   +1 more source

Nitrogen, Nitrogen Cycle

2001
Sandy L. Tartowski, Robert W. Howarth
openaire   +1 more source

Cell cycle control in cancer

Nature Reviews Molecular Cell Biology, 2021
Helen K Matthews   +2 more
exaly  

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