noun
COLLOCATIONS FROM OTHER ENTRIES
a carbon/nitrogen/sulphur etc compound
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Use a copper compound to protect the trees from pests.
COLLOCATIONS FROM CORPUS
■ ADJECTIVE
liquid
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The specimens were weighed immediately, frozen in liquid nitrogen , and stored at -80°C.
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The ceramics -- cables encased in a sheath of liquid nitrogen -- are being developed for power generation and other machinery applications.
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In addition, it would consume liquid nitrogen for cooling purposes at approximately £20 per trip.
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The tissue was then snap-frozen by immersion in liquid nitrogen before storage at -70°C for up to six months.
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At both operations, biopsies from the tumour and non-tumour liver tissue were collected and snap frozen in liquid nitrogen .
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After immersion in 40% glycerin solution at room temperature, they were placed on a copper stage and frozen with liquid nitrogen .
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This test was used to ensure a 100% death rate of cells frozen in liquid nitrogen .
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The specimens were frozen immediately in liquid nitrogen and subjected to autofluorescence microscopy.
■ NOUN
dioxide
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It is usually caused by the emission of particulates or nitrogen dioxide .
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The sulphur dioxide level in Belfast was 32 parts per billion while the nitrogen dioxide level was 48.
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The southern California air basin is the only area in the country that still fails to meet the nitrogen dioxide standard.
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The gas is cleaned prior to burning and the sulphur dioxide and nitrogen dioxide, thought to contribute to acid rain, removed.
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However, this statistic conceals that levels of nitrogen dioxide have changed little since 1983.
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Of those figures, Britain contributed 1.84 million tonnes of sulphur and an equal amount of nitrogen dioxide .
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Apart from general operating conditions, it has set emission limits for sulphur dioxide , nitrogen dioxide and carbon monoxide.
fixation
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What are the prospects for nitrogen fixation in plants?
gas
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Around half of the nitrogen in the burnt biomass may be released as nitrogen gas .
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It was inflated with nitrogen gas within minutes and looked like a silver parachute.
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Four-fifths of the modern atmosphere consists of nitrogen gas .
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Bacteria then work on the nitrates converting them firstly to nitrous oxide and then to free nitrogen gas .
oxide
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The new standards cut emissions of carbon monoxide, nitrogen oxides , gaseous hydrocarbons and particulate matter.
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First, the nitrogen oxides are toxic to animals.
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To avoid further damage to sensitive ecosystems, sulphur and nitrogen oxide emissions must be cut by 90 percent.
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These same nitrogen oxides , in high but apparently plausible concentrations, will defoliate plants.
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Nitrogen oxide Forty percent of nitrogen oxide emissions in Britain come from vehicles.
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Global warming occurs when carbon dioxide and some other gases, such as methane and nitrogen oxides , accumulate in the atmosphere.
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The situation is exacerbated by unusually low levels of nitrogen oxides , which inhibit ozone destruction.
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Large explosions heat vast masses of the atmosphere to such high temperatures that nitrogen is partially burned to make toxic nitrogen oxides .
■ VERB
freeze
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The specimens were weighed immediately, frozen in liquid nitrogen , and stored at -80°C.
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This test was used to ensure a 100% death rate of cells frozen in liquid nitrogen .
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The specimens were frozen immediately in liquid nitrogen and subjected to autofluorescence microscopy.
reduce
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The nitrogenous materials which have been oxidized aerobically to nitrate are then reduced anaerobically to nitrogen .
EXAMPLES FROM CORPUS
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Aerozine 50 was used as the fuel, with nitrogen tetroxide as the oxidizer.
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Both countries would also limit nitrogen oxide emissions through stricter controls on motor vehicles.
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But close examination showed that species intolerant of acid conditions or high nitrogen levels were not reappearing.
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Global warming occurs when carbon dioxide and some other gases, such as methane and nitrogen oxides, accumulate in the atmosphere.
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Large explosions heat vast masses of the atmosphere to such high temperatures that nitrogen is partially burned to make toxic nitrogen oxides.
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On reflection, I think we made the nitrogen bands rather too wide.
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Peas and beans put nitrogen into the soil.
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The very low abundances of volatiles and especially the low nitrogen abundance all pose special problems.