nitrites


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nitrites

Chemistry
A family of chemically stable forms of inorganic nitrogen that are not present in significant amounts in the environment. Nitrites in the blood originate from bacterial conversion of nitrates present in vegetables, as well as from nitrites ingested as preservatives (e.g., sodium nitrite, used as a preservative for fish and meats, such as hot dogs, bacon, corned beef, ham, liverwurst or salami), which have been associated with allergic reactions and formation of methaemoglobin. Nitrites are potentially toxic, given their conversion to carcinogenic nitrosamines.

Lab medicine
The reduction products of nitrates by bacteria in urine. In a standard dipstick test, nitrites combine with sulfanilamide on the dipstick, resulting in diazonium salt formation which, in the presence of a dye on the dipstick, forms a coloured azo dye.
References in periodicals archive ?
Denitrification is a respiratory process in which soluble nitrogen oxides, nitrates, and nitrites are reduced to NO, [N.
The IAEC (International Agency for Research on Cancer) was wrong when they said in 2006 that nitrites and nitrates were "probably carcinogenic" to humans.
Such terminology is confusing because most consumers look to "organic" processed meats in order to avoid nitrites, but the fact is that these do contain nitrites, sometimes in lesser, sometimes in greater amounts than found in conventional products.
TABLE 1 Nitrates and Nitrites in Water Samples from Industrialized Area Location of Sampling Point Nitrate (mg/L) Nitrite (mg/L) Ekpan River 1.
Three users (25%) typically sprayed nitrites directly into their nose or mouth, and two (17%) users usually had sniffed or inhaled nitrites from a plastic bag placed over their nose, mouth, or head.
This information helps us track chemical pathways and determine how much nitrite is recycled naturally back into nitrate, which is to reused by other microbes in the ocean, and how much is converted into nitrogen or nitrous oxide gas, which is released back into the atmosphere.
Pulmonary exposure to isobutyl nitrite reduces resistance to a respiratory infection.
Mutagenicity of some alkyl nitrites used as recreational drugs.
Applegate Farms has announced a solution to this dilemma with the launch of Hand-Held Stuffed Sandwiches--a line of frozen pastry pockets with natural fillings and no antibioliics, nitrites or chemical preservatives.
Nitrites combine with stomach juices to form powerful cancer-causing nitrosamines.
Studies show that several frogs, toads and other amphibians, especially at vulnerable larval stages, are susceptible to low levels of nitrates and nitrites.