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单词 nitrogen
释义

Definition of nitrogen in English:

nitrogen

noun ˈnʌɪtrədʒ(ə)nˈnaɪtrədʒən
mass noun
  • The chemical element of atomic number 7, a colourless, odourless unreactive gas that forms about 78 per cent of the earth's atmosphere. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant.

    (化学元素)氮(符号: N

    Example sentencesExamples
    • Fertilisers contain high concentrations of nitrogen to help promote the growth of crops.
    • The data demonstrate that nitrogen and phosphorus are in especially short supply.
    • This is a wasteful process causing a net loss of nitrogen to the animal and pollution of the environment.
    • Real snow was to have been made on site by spraying air, water, and liquid nitrogen under pressure.
    • Seeds were not inoculated with rhizobia and plants were dependent on inorganic nitrogen.
    • Ammonium is the reduced nitrogen form available to plants for assimilation into amino acids.
    • This may be due to the different functions of nitrogen and phosphorus in the plant.
    • Obviously, vigorous shoots in high light attracted more nitrogen from other sources.
    • Plant tissue was ground in liquid nitrogen and the protein extracted as described earlier.
    • This is where the body's tissues have been loaded by nitrogen and micro bubbles have been formed.
    • Their gas mix contains far less nitrogen than their air table or computer assumes they are breathing.
    • The study mapped where common heather was contaminated by nitrogen in excess of safety limits.
    • A continuous flow of liquid nitrogen is then circulated through the probe into the lung and out again.
    • The absorption of nitrogen by plants plays an important role in their growth.
    • Another approach is to apply less nitrogen and cut silage at the usual time of year.
    • They rise during the day to find sunlight and sink to the depths at night, possibly to absorb nitrogen.
    • These are then carried to the chamber in which the coating will be applied by an inert carrier gas such as nitrogen.
    • They are formed as a consequence of a layer of nitrogen in the upper atmosphere that also attacks ozone.
    • The white clover takes nitrogen from the air and puts it into the soil for the grass to feed on.
    • The samples were frozen in liquid nitrogen to prevent migration of the fluorescent compounds.

Origin

Late 18th century: from French nitrogène (see nitre, -gen).

Definition of nitrogen in US English:

nitrogen

nounˈnītrəjənˈnaɪtrədʒən
  • The chemical element of atomic number 7, a colorless, odorless unreactive gas that forms about 78 percent of the earth's atmosphere. Liquid nitrogen (made by distilling liquid air) boils at 77.4 kelvins (−195.8°C) and is used as a coolant.

    (化学元素)氮(符号: N

    Example sentencesExamples
    • Another approach is to apply less nitrogen and cut silage at the usual time of year.
    • These are then carried to the chamber in which the coating will be applied by an inert carrier gas such as nitrogen.
    • Ammonium is the reduced nitrogen form available to plants for assimilation into amino acids.
    • The samples were frozen in liquid nitrogen to prevent migration of the fluorescent compounds.
    • Obviously, vigorous shoots in high light attracted more nitrogen from other sources.
    • They rise during the day to find sunlight and sink to the depths at night, possibly to absorb nitrogen.
    • They are formed as a consequence of a layer of nitrogen in the upper atmosphere that also attacks ozone.
    • Their gas mix contains far less nitrogen than their air table or computer assumes they are breathing.
    • Plant tissue was ground in liquid nitrogen and the protein extracted as described earlier.
    • The study mapped where common heather was contaminated by nitrogen in excess of safety limits.
    • The data demonstrate that nitrogen and phosphorus are in especially short supply.
    • This may be due to the different functions of nitrogen and phosphorus in the plant.
    • Seeds were not inoculated with rhizobia and plants were dependent on inorganic nitrogen.
    • This is a wasteful process causing a net loss of nitrogen to the animal and pollution of the environment.
    • A continuous flow of liquid nitrogen is then circulated through the probe into the lung and out again.
    • This is where the body's tissues have been loaded by nitrogen and micro bubbles have been formed.
    • Fertilisers contain high concentrations of nitrogen to help promote the growth of crops.
    • The absorption of nitrogen by plants plays an important role in their growth.
    • Real snow was to have been made on site by spraying air, water, and liquid nitrogen under pressure.
    • The white clover takes nitrogen from the air and puts it into the soil for the grass to feed on.

Origin

Late 18th century: from French nitrogène (see niter, -gen).

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更新时间:2025/2/7 12:16:00