Properties[ change change source ] Cup of liquid nitrogen Nitrogen is a colorless odorless gas at normal temperature. It is normally attached to another nitrogen atom, making a nitrogen molecule N2.
Related to Nitrogen compounds: It is a gas constituting about four-fifths of common air; chemically it is almost inert. It is not poisonous but is fatal if breathed alone because of oxygen deprivation.
It is soluble in the blood and body fluids, and can cause serious symptoms when released as bubbles of gas by rapid decompression see bends. Nitrogen occurs in proteins and amino Nitrogen containing compounds and is thus present in all living cells.
When protein is metabolized, about 90 per cent of its nitrogen is excreted in the urine in the form of ureauric acidcreatinineand other nitrogen Nitrogen containing compounds. The remaining 10 per cent of the nitrogen is eliminated in the feces. A negative nitrogen balance occurs when more protein is used by the body than is taken in.
A positive nitrogen balance implies a net gain of protein in the body. Negative nitrogen balance can be caused by such factors as malnutritiondebilitating diseases, blood loss, and glucocorticoids.
A positive balance can be caused by exercise, growth hormoneand testosterone. Some have been used as antineoplastic agents in certain forms of cancer; they do not cure these conditions, but ease their effects by destroying mitotic cells those newly formed by divisionthereby affecting malignant tissue in its early stage of development, and leaving normal tissue unaffected.
They are especially useful in treatment of leukemia, in which they reduce the leukocyte count, and in cases in which the malignant disease is widespread throughout the body and therefore cannot be effectively treated locally by surgery or radiotherapy.
In cases of lung cancer, mechlorethamine hydrochloride is usually injected directly into the lungs via the pulmonary circulation.
Nitrogen constitutes on the average about 16 percent by weight of the complex organic compounds known as proteins, present in all living organisms. The natural abundance of nitrogen in Earth’s crust is part per 1, Compounds containing nitrogen in the +5 oxidation state are strong oxidizing agents. They are one of the more common groups of nitrogen compounds. They include nitric acid and dinitrogen pentoxide. containing an oxygen, nitrogen, or fluorine atom that is attached to a hydrogen atom. This interaction is the hydrogen bond, an interaction of the form A―H···B, where A and B are atoms of any of the three elements mentioned above and the hydrogen atom lies on a straight.
Side effects, which tend to limit the usefulness of these drugs, include nausea, vomiting, and a decrease in bone marrow production. Measurement of this is used as a test of renal function, but has been largely replaced by measurement of specific substances, such as urea and creatinine. The nitrogen content of the exhalation is measured over the entire breath and a curve is generated; different parts of the curve represent nitrogen concentrations of gas in different components of the total lung capacity, and can be analyzed for irregularities.
Called also single breath test. A gaseous element, atomic no. The molecular form of nitrogen, N2. Pharmaceutical grade N2, containing not less than It forms about 78 per cent of the atmosphere and is a constituent of all proteins and nucleic acids.
Gk, nitron, soda, genein, to produce a gaseous nonmetallic element. Its atomic number is 7; its atomic mass is It exists as a diatomic molecule, N2.
Nitrogen is essential to the synthesis of necessary proteins, particularly nitrogen-containing compounds or amino acids derived directly or indirectly from plant food. Nitrogen follows a cycle from atmospheric gas into nitrogen-fixing bacteria, into green vascular plants, into humans and animals, and, by decay or in excreted nitrogenous wastes, as urea, back into the soil.
Denitrifying bacteria in the soil break down nitrogenous compounds and release gaseous nitrogen. During a hour period in a healthy individual the nitrogen excreted in the urine, feces, and perspiration, together with the nitrogen retained in dermal structures, such as the skin and hair, equals the nitrogen consumed in food and drink.
The process of protein metabolism accounts for this nitrogen balance. When protein catabolism exceeds protein anabolism, the amount of nitrogen in the urine exceeds the amount of nitrogen consumed in foods, producing a negative nitrogen balance or a state of tissue wasting.
A positive nitrogen balance exists in the body when the nitrogen intake in foods is greater than that excreted in urine.
Conditions usually associated with positive nitrogen balance include those related to growth, pregnancy, and convalescence from a tissue-wasting illness. Nitrogen is critical to all biological systems and is present in proteins and DNA.
A gaseous element; atomic no. It occurs free in the atmosphere and forms approx. CAS A component of all proteins, nitrogen is essential to plant and animal life for tissue building.
Generally it is found organically only in the form of compounds such as ammonia, nitrites, and nitrates. These are transformed by plants into proteins and, being consumed by animals, are converted into animal proteins of the blood and tissues. It is a powerful oxidant that can cause lung injury when inhaled at high concentrations.tobacco plants, where nitrogen is incorporated into compounds that have moved to the roots through the phloem as sugars.
If a tomato shoot is grafted onto a tobacco rootstock, nicotine-containing tomato leaves are formed. Amides are another important nitrogen containing organic compound.
The key feature of an amine is a nitrogen atom bonded to a carbonyl carbon atom. The key feature of an amine is a nitrogen atom bonded to a carbonyl carbon atom.
Nitrogen is essential to the synthesis of necessary proteins, particularly nitrogen-containing compounds or amino acids derived directly or indirectly from plant food.
Nitrogen follows a cycle from atmospheric gas into nitrogen-fixing bacteria, into green vascular plants, into humans and animals, and, by decay or in excreted nitrogenous wastes.
Compounds containing nitrogen in the +2 oxidation state, such as nitric oxide, are reducing agents. +3 oxidation state compounds are strong oxidizing agents and weak reducing agents. Nitrites are the most common +3 compounds. A number of nitrogen containing compounds (NCC) accumulate in plants exposed to salinity stress.
The most frequently accumulating NCC include amino acids, amids, imino acids, proteins, quarternary ammonium compounds (QAC) and polyamines.
The specific NCC that . Nitrogen constitutes approximately 78% of the atmosphere and is a component of all proteins and a major component of most organic substances in living cells. Nitrogen is essential to the synthesis of necessary proteins, particularly nitrogen-containing compounds or amino acids derived directly or .