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  2. Dissimilatory nitrate reduction to ammonium - Wikipedia

    en.wikipedia.org/wiki/Dissimilatory_nitrate...

    Dissimilatory nitrate reduction to ammonium is a two step process, reducing NO 3 − to NO 2 − then NO 2 − to NH 4 +, though the reaction may begin with NO 2 − directly. [1] Each step is mediated by a different enzyme, the first step of dissimilatory nitrate reduction to ammonium is usually mediated by a periplasmic nitrate reductase.

  3. Table of explosive detonation velocities - Wikipedia

    en.wikipedia.org/wiki/Table_of_explosive...

    This is a compilation of published detonation velocities for various high explosive compounds. Detonation velocity is the speed with which the detonation shock wave travels through the explosive.

  4. Nitrification - Wikipedia

    en.wikipedia.org/wiki/Nitrification

    Nitrification is important in agricultural systems, where fertilizer is often applied as ammonia. Conversion of this ammonia to nitrate increases nitrogen leaching because nitrate is more water-soluble than ammonia. Nitrification also plays an important role in the removal of nitrogen from municipal wastewater.

  5. Denitrification - Wikipedia

    en.wikipedia.org/wiki/Denitrification

    Direct reduction from nitrate to ammonium, a process known as dissimilatory nitrate reduction to ammonium or DNRA, [6] is also possible for organisms that have the nrf-gene. [ 7 ] [ 8 ] This is less common than denitrification in most ecosystems as a means of nitrate reduction.

  6. Anammox - Wikipedia

    en.wikipedia.org/wiki/Anammox

    A maximum ammonium removal rate of 0.4 kg N/m 3 /d was achieved. It was shown that for every mole of ammonium consumed, 0.6 mol of nitrate was required, resulting in the formation of 0.8 mol of N 2 gas. In 1995, the biological nature of anammox was identified. [27] Labeling experiments with 15 NH + 4 in combination with 14 NO − 3 showed that ...

  7. Nitrogen cycle - Wikipedia

    en.wikipedia.org/wiki/Nitrogen_cycle

    The amount of ammonium in the ocean is about 3 orders of magnitude less than nitrate. [42] Between ammonium, nitrite, and nitrate, nitrite has the fastest turnover rate. It can be produced during nitrate assimilation, nitrification, and denitrification; however, it is immediately consumed again.

  8. Devarda's alloy - Wikipedia

    en.wikipedia.org/wiki/Devarda's_alloy

    When a solution of nitrate ions is mixed with aqueous sodium hydroxide, adding Devarda's alloy and heating the mixture gently, liberates ammonia gas. After conversion under the form of ammonia, the total nitrogen is then determined by Kjeldahl method. [7] The reduction of nitrate by the Devarda's alloy is given by the following equation: 3 NO −

  9. Nitrifying bacteria - Wikipedia

    en.wikipedia.org/wiki/Nitrifying_bacteria

    [12] [13] Complete nitrification, the conversion of ammonia to nitrate in a single step known as comammox, has an energy yield (∆G°′) of −349 kJ mol −1 NH 3, while the energy yields for the ammonia-oxidation and nitrite-oxidation steps of the observed two-step reaction are −275 kJ mol −1 NH 3, and −74 kJ mol −1 NO 2 − ...