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In these areas, nitrate (NO 3 −) or nitrite (NO 2 − ) can be used as a substitute terminal electron acceptor instead of oxygen (O 2 ), a more energetically favourable electron acceptor. Terminal electron acceptor is a compound that gets reduced in the reaction by receiving electrons.
High electron donor (organic carbon) to acceptor (nitrate) ratio; High summer temperatures and low NO 3 − concentrations; High sulfide concentration can inhibit the processes of nitrification and denitrification. Meanwhile, it can also enhance dissimilatory nitrate reduction to ammonium since high sulfide concentration provides more electron ...
Nitrogen cycle. Nitrification is the biological oxidation of ammonia to nitrate via the intermediary nitrite.Nitrification is an important step in the nitrogen cycle in soil.The process of complete nitrification may occur through separate organisms [1] or entirely within one organism, as in comammox bacteria.
Nitrates affect the nitrate‐nitrite‐nitric oxide pathway, in which nitrates are recycled in blood and tissue to produce nitric oxide — an important molecule for vascular health and blood flow.
Dark leafy greens are high in dietary nitrates, which convert into nitric oxide in the body, Smith noted. "That relaxes the blood vessels and lowers the blood pressure," she said. Dark leafy ...
The reaction can be further divided into different half reactions each requiring a specific enzyme. The transformation from nitrate to nitrite is performed by nitrate reductase (Nar) NO 3 − + 2 H + + 2 e − → NO 2 − + H 2 O. Nitrite reductase (Nir) then converts nitrite into nitric oxide 2 NO 2 − + 4 H + + 2 e − → 2 NO + 2 H 2 O
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The nitrite ion has the chemical formula NO − 2. Nitrite (mostly sodium nitrite) is widely used throughout chemical and pharmaceutical industries. [1] The nitrite anion is a pervasive intermediate in the nitrogen cycle in nature. The name nitrite also refers to organic compounds having the –ONO group, which are esters of nitrous acid.