de-nitrification

(noun)

A microbially facilitated process of nitrate reduction that may ultimately produce molecular nitrogen (N2) through a series of intermediate gaseous nitrogen oxide products.

Related Terms

Examples of de-nitrification in the following topics:

  • The Nitrogen Cycle

    • Nitrificaton: Nitrification is the conversion of ammonia (NH3) to nitrate (NO3-).
    • Nitrification is performed mainly by the genus of bacteria, Nitrobacter.
    • Nitrification can also work on ammonium.
    • It can either be cycled back into a plant usable form through nitrification or returned to the atmosphere through de-nitrification.
    • De-Nitrification: Nitrogen in its nitrate form (NO3-) is converted back into atmospheric nitrogen gas (N2) by bacterial species such as Pseudomonas and Clostridium, usually in anaerobic conditions.

  • Nitrification

    • Nitrification is an important step in the nitrogen cycle in soil.
    • Nitrification is an aerobic process performed by small groups of autotrophic bacteria and archaea.
    • The transformation of ammonia to nitrite is usually the rate limiting step of nitrification.
    • Nitrification also plays an important role in the removal of nitrogen from municipal wastewater.
    • The conventional removal is nitrification, followed by denitrification.

  • Psychrophilic Crenarchaeota

    • Nitrification , as stated above, is formally a two-step process; in the first step ammonia is oxidized to nitrite, and in the second step nitrite is oxidized to nitrate.
    • Crenarchaeote are abundant in the ocean and some species have a 200 times greater affinity for ammonia than AOB, leading researchers to challenge the previous belief that AOB are primarily responsible for nitrification in the ocean.
    • Nitrification is the biological oxidation of ammonia with oxygen into nitrite followed by the oxidation of these nitrites into nitrates.
    • Degradation of ammonia to nitrite is usually the rate limiting step of nitrification.
    • Nitrification is an important step in the nitrogen cycle in soil.

  • Nitrospirae and Deferribacter

    • By a process known as nitrification, bacteria convert these waste products to less toxic forms.

  • Habitats and Energy Metabolism of Crenarchaeota

    • Some marine Crenarchaeota are capable of nitrification, suggesting these organisms may affect the oceanic nitrogen cycle, although these oceanic Crenarchaeota may also use other sources of energy.

  • History of Epidemiology

    • The term "epidemiology" appears to have first been used to describe the study of epidemics in 1802 by the Spanish physician Joaquín de Villalba in Epidemiología Española.
    • In 1543 he wrote a book De contagione et contagiosis morbis, in which he was the first to promote personal and environmental hygiene to prevent disease.

  • Microorganisms and Water Quality

    • The de-oxygenated water is harmful to fish and other aquatic life.

  • Classification and Nomenclature

    • Many species are named after people, either the discoverer or a famous person in the field of microbiology, for example Salmonella is after D.E.

  • Oxidation of Reduced Sulfur Compounds

    • During his research in Anton de Bary's laboratory of botany in 1887, Russian botanist Winogradsky found that Beggiatoa oxidized hydrogen sulfide (H2S) as an energy source, forming intracellular sulfur droplets.