- cycle of nitrogen
- 氮循環
English-Chinese dictionary. 2013.
cycle of nitrogen
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Nitrogen fixation — is the natural process, either biological or abiotic, by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3).[1] This process is essential for life because fixed nitrogen is required to biosynthesize the basic building blocks of … Wikipedia
Nitrogen cycle — Schematic representation of the flow of nitrogen through the environment. The importance of bacteria in the cycle is immediately recognized as being a key element in the cycle, providing different forms of nitrogen compounds assimilable by higher … Wikipedia
cycle — 1. A recurrent series of events. 2. A recurring period of time. 3. One successive compression and rarefaction of a wave, as of a sound wave. [G. kyklos, circle] anovulatory c. a … Medical dictionary
nitrogen cycle — noun the circulation of nitrogen; nitrates from the soil are absorbed by plants which are eaten by animals that die and decay returning the nitrogen back to the soil • Hypernyms: ↑organic process, ↑biological process * * * ˈnitrogen cycle 7… … Useful english dictionary
Nitrogen-13 — Full table General Name, symbol Nitrogen 13,13N Neutrons 6 Protons 7 … Wikipedia
nitrogen cycle — n a continuous series of natural processes by which nitrogen passes through successive stations in air, soil, and organisms and which principally involves nitrogen fixation, nitrification, decay, and denitrification * * * the steps by which… … Medical dictionary
Nitrogen trifluoride — Nitrogen trifluoride … Wikipedia
nitrogen cycle — n. the cycle of natural processes through which atmospheric nitrogen is converted by nitrogen fixation and nitrification into compounds used by plants and animals in the formation of proteins and is eventually returned by decay and… … English World dictionary
Nitrogen washout — (or Fowler s method) is a test for measuring dead space in the lung during a respiratory cycle, as well as some parameters related to the closure of airways. Contents 1 Procedure 2 Parameters 3 See also 4 References … Wikipedia
Nitrogen — carbon ← nitrogen → oxygen ↑ N ↓ P … Wikipedia
nitrogen cycle — /ˈnaɪtrədʒən saɪkəl/ (say nuytruhjuhn suykuhl) noun the continuous circulation of nitrogen and nitrogen compounds in nature between the atmosphere, the soil, and the various organisms to which nitrogen is essential. The nitrogen cycle describes… …
