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ammonia

Overview page. Subjects: Chemistry.

An atmospheric pollutant that may react with combustion gases, such as nitric oxide, to produce tiny particles of ammonium nitrate, which aggravate respiratory and coronary problems. Often...

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ammonia

Elizabeth Martin and Robert Hine.

in A Dictionary of Biology

January 2008; p ublished online January 2008 .

Reference Entry. Subjects: Biological Sciences. 115 words.

A colourless gas, NH3, with a strong pungent odour. Ammonia is produced by the deamination of excess amino

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ammonia

Edited by Robert Hine and Elizabeth Martin.

in A Dictionary of Biology

June 2016; p ublished online September 2015 .

Reference Entry. Subjects: Biological Sciences. 115 words.

A colourless gas, NH3, with a strong pungent odour. Ammonia is produced by the *deamination of excess

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ammonia

Edited by T. F. Hoad.

in The Concise Oxford Dictionary of English Etymology

January 1996; p ublished online January 2003 .

Reference Entry. Subjects: History of English. 53 words.

XVIII. — modL. ammōnia, so named as being obtained from sal ammoniac. ammoniac XIV, earliest form armoniak — medL.

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ammonia

Michael Kent.

in The Oxford Dictionary of Sports Science & Medicine

January 2006; p ublished online January 2007 .

Reference Entry. Subjects: Sports and Exercise Medicine. 55 words.

A colourless, pungent gas, extremely soluble in water. Ammonia is produced during intense exercise, causing its concentration to be increased

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ammonia slip

Chris Park and Michael Allaby.

in A Dictionary of Environment and Conservation

P ublished online January 2017 .

Reference Entry. Subjects: Conservation of the Environment (Environmental Science). 46 words.

*Ammonia (NH3) used as a reductant in a *selective catalytic reduction process that passes through the

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ammonia clock

Overview page. Subjects: Chemistry — Physics.

A form of atomic clock in which the frequency of a quartz oscillator is controlled by the vibrations of excited ammonia molecules. The ammonia molecule (NH3) consists of a pyramid with a...

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histidine ammonia‐lyase

Edited by Richard Cammack, Teresa Atwood, Peter Campbell, Howard Parish, Anthony Smith, Frank Vella and John Stirling.

in Oxford Dictionary of Biochemistry and Molecular Biology

January 2006; p ublished online January 2008 .

Reference Entry. Subjects: Biochemistry. 85 words.

EC 4.3.1.3; systematic name: l‐histidine ammonia‐lyase; other names: histidase; histidine α‐deaminase; histidinase. An ammonia‐lyase (deaminase) enzyme

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histidine ammonia lyase

John Lackie.

in A Dictionary of Biomedicine

January 2010; p ublished online January 2010 .

Reference Entry. Subjects: Clinical Medicine. 40 words.

An enzyme (histidase, EC 4.3.1.3, 657 aa) that converts histidine into ammonia and urocanic acid. Mutations in the gene cause

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glutamate‐ammonia ligase

Edited by Richard Cammack, Teresa Atwood, Peter Campbell, Howard Parish, Anthony Smith, Frank Vella and John Stirling.

in Oxford Dictionary of Biochemistry and Molecular Biology

January 2006; p ublished online January 2008 .

Reference Entry. Subjects: Biochemistry. 145 words.

EC 6.3.1.2; systematic name: l‐glutamate:ammonia ligase (ADP‐forming); other name: glutamine synthetase. An enzyme that catalyses a reaction

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glutamate-ammonia ligase

Overview page. Subjects: Chemistry.

EC 6.3.1.2; systematic name: l‐glutamate:ammonia ligase (ADP‐forming); other name: glutamine synthetase. An enzyme that catalyses a reaction between ATP, l‐glutamate, and NH3 to form ADP,...

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