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ammonia cycle

См. также в других словарях:

  • Ammonia poisoning — is a common fish disease in new aquariums, especially when immediately stocked to full capacity. Ideally, the level of ammonia (NH3) and ammonium compounds (i.e. those containing NH4+) should be zero. Although trace amounts are generally harmless …   Wikipedia

  • ammonia poisoning — ammonia may build up in aquaria from fish wastes, decaying food and plant material and poison fish. Symptoms are gasping, excess mucus production, reddening skin from capillary haemorrhages, erratic behaviour. An efficient biological filtration… …   Dictionary of ichthyology

  • Ammonia — For other uses, see Ammonia (disambiguation). Ammonia …   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 — 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

  • Urea cycle disorder — Infobox Disease Name = PAGENAME Caption = ammonia DiseasesDB = ICD10 = ICD10|E|72|2|e|70 ICD9 = ICD9|270.6 ICDO = OMIM = MedlinePlus = 000372 eMedicineSubj = eMedicineTopic = MeshID = An urea cycle disorder or urea cycle defect is a genetic… …   Wikipedia

  • Urea cycle — The urea cycle (also known as the ornithine cycle) is a cycle of biochemical reactions occurring in many animals that produces urea ((NH2)2CO) from ammonia (NH3). This cycle was the first metabolic cycle discovered (Hans Krebs and Kurt Henseleit …   Wikipedia

  • nitrogen cycle — the continuous sequence of events by which atmospheric nitrogen and nitrogenous compounds in the soil are converted, as by nitrification and nitrogen fixation, into substances that can be utilized by green plants, the substances returning to the… …   Universalium

  • Heat pump and refrigeration cycle — Thermodynamic heat pump and refrigeration cycles are the models for heat pumps and refrigerators. The difference between a heat pump and a normal air conditioner is that a heat pump can be used to heat a home as well as cool it. Even though the… …   Wikipedia

  • Atofina-PCUK cycle — The Atofina PCUK cycle is an industrial process for the manufacture of hydrazine. Ammonia and hydrogen peroxide are the starting points of the cycle. Acetone is consumed and regenerated in the reaction.The cycle begins with ammonia reacting with… …   Wikipedia

  • urea cycle — a series of metabolic reactions, occurring in the liver, by which ammonia is converted to urea using cyclically regenerated ornithine as a carrier. See illustration. Urea cycle. Diagrammatic representation of reactions by which excess nitrogen in …   Medical dictionary

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