nitrites definition biology

The initial step of this process, known as nitritation , involves a type of bacteria called nitrosomonas . Nitrites are used as food preservatives, e.g. Definition. Nitrites appear in the urine when a person has a bacterial infection in their bladder, ureter, or kidneys. Biology definition, the science of life or living matter in all its forms and phenomena, especially with reference to origin, growth, reproduction, structure, and behavior. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Nitrogen fixation, any natural or industrial process that causes free nitrogen, which is a relatively inert gas plentiful in air, to combine chemically with other elements to form more-reactive nitrogen compounds such as ammonia, nitrates, or nitrites. Biology is the study of living organisms and their structure, life-cycles, adaptations and environment. Nitrite is the univalent radical NO 2 or a compound containing it, such as a salt or an ester of nitrous acid.. It needs to be converted to nitrates, via a process called nitrogen cycle. Salts of nitrous acid or compounds containing the group NO2-The inorganic nitrites of the type MNO2 (where M=metal) are all insoluble, except the alkali nitrites. Did Princeton Review, a prestigious company, really just make a big mistake in the fifteenth edition of their biology review book? Nitrites can be good when they form nitric oxide, but when they form nitrosamines, it can have a negative effect and may be where cancer-causing cells occur. Nitrite, any member of either of two classes of compounds derived from nitrous acid. They have several roles in foods and have become a necessary component in many of our favorite products. 67, United Nations, New York, 1997. Nitrites are colorless, crystalline compounds that are thermally less stable than nitrates. Nitrates/Nitrites Diagnosis/Treatment Options: Prevention Strategies: Links for Additional Information: No routine medical test to determine nitrite or nitrate levels in the blood currently exists. cured meats. USDA might finally update the definition of natural nitrites and nitrates used in processed meats "Consumers are being told implicitly that something is safer when it may not be" Unlike in vegetables, the nitrites in processed meats are in close proximity to proteins (Credit: Getty) Non-synthetic versions of nitrates and nitrites are extracted and modified to be used as a "healthier" preservative in deli meat. Information and translations of nitrites in the most comprehensive … nitrates: A family of chemically stable forms of inorganic nitrogen, which are formed as part of the natural breakdown of organic matter. English Wikipedia - The Free Encyclopedia. Module 26: Ecology and the Environment. The nitrite ion, which has the chemical formula NO 2-, is a symmetric anion with equal N–O bond lengths and an O–N–O bond angle of approximately 120°. Inorganic nitrate and nitrite from endogenous or dietary sources are metabolized in vivo to nitric oxide (NO) and other bioactive nitrogen oxides. Discuss the nitrogen cycle and nitrogen’s role on Earth; Nitrogen is a major component of our nucleic acids and proteins and is critical to human agriculture. Nitrites in the urine are diagnosed with a test called a urinalysis.A urinalysis may be done for a variety of reasons including: if you have symptoms of a UTI, like painful urination Nitrites don’t make it on your grocery list but likely end up in your fridge. Learn more about nitrogen fixation in … English [] Noun []. Definition of alkyl nitrites in the Definitions.net dictionary. What does alkyl nitrites mean? Meaning of nitrites. Esters of nitrous acid are covalent compounds having the structure R―O―N―O, in Livestock health problems How to eliminate nitrites from your water. 1. Search for: The Nitrogen Cycle. What does nitrites mean? Biology for Majors II. Air, which is 79% nitrogen gas (N 2), is the major reservoir of nitrogen. Sodium nitrite definition is - a salt NaNO2 used especially in dye manufacture and as a meat preservative. nitrites. Wikipedia Dictionaries. Definition from Wiktionary, the free dictionary. Description nitrites: Chemistry A family of chemically stable forms of inorganic nitrogen that are not present in significant amounts in the environment. Learn more here. Nitrites salts of nitrous acid, HNO2. Information and translations of alkyl nitrites in the most comprehensive dictionary definitions resource on the web. The nitrate-nitrite-NO pathway is emerging as an important mediator of blood flow regulation, cell signaling, energetics and tissue responses to hypoxia. Well, you couldn't be more wrong! One such element is Nitrogen. What are Nitrites/Nitrates? Ammonia, nitrites, and nitrates are all toxic to fish and must be quickly and effectively removed from the aquarium. Definition of nitrites in the Definitions.net dictionary. However, even if no nitrites are found, you still may have an infection, because bacteria don't always change nitrates into nitrites. Synthetic versions are produced in a lab. Learning Outcomes. ; But … See more. This transformation can be carried out by both biological and non-biological processes.. Nitrogen Cycle Definition The nitrogen cycle refers to the cycle of nitrogen atoms through the living and non-living systems of Earth. Description. We are generally under the impression that we only need oxygen to live. Nitrite is also an antioxidant and has antimicrobial properties, so they provide a significant food safety benefits, such as preventing the growth of Clostridium botulinum which causes botulism, one the deadliest foodborne illnesses. Nitrites: One nitrogen molecule bound to two oxygen molecules (NO2-) There are two sources of nitrates and nitrites used in the food supply: synthetic and natural. Their most common use in foods is inclusion in cured meats, but they are present in many dietary sources including vegetables and drinking water. There is a laundry list of elements animals need for survival. Nitrite and nitrosamine intake are associated with risk of gastric cancer and oesophageal cancer. A proper functioning biological filter will do this, and help establish a happy, healthy tank. plural of nitrite; Anagrams []. It might be outdated or ideologically biased. Nitrites (n.). nitrites: Plural form of nitrite. The nature of decomposition depends on the cation. Nitrites synonyms, Nitrites pronunciation, Nitrites translation, English dictionary definition of Nitrites. Nitrates and nitrites are compounds that occur naturally in the human body and some foods, such as vegetables. Salts of nitrous acid are ionic compounds containing the nitrite ion, NO-2, and a positive ion such as Na+ in sodium nitrite (NaNO2). Definition: Nitrites are nitrous oxide salts used in food preservation. n. The univalent anionic group NO2, derived from nitrous acid, or a compound containing this group. But we can't just get nitrogen from the air. Manufacturers also add them to … Nitrates are ingested in vegetables and absorbed from the gastrointestinal tract; an estimated 25% of absorbed nitrates are released into the saliva, 20% of which are converted into nitrites. Source Publication: Glossary of Environment Statistics, Studies in Methods, Series F, No. Secondary amines arise by the degradation of proteins (food). Jump to navigation Jump to search. Nitrites give cured meats, like ham and bacon, the distinct color, aroma and flavor we love. What is a nitrites, definition of nitrites, meaning of nitrites, nitrites anagrams, word that start with nitrites. Who should be tested for nitrites, and how are they formed? Meaning of alkyl nitrites. In the 1970s, an elevated frequency of liver cancer was found in Norwegian farm animals. Definition. But nitrites, and the chemicals formed from them, are much more reactive. … If there are nitrites in your urine, it may mean that you have a UTI. In nitrification, ammonia is first converted to nitrites (NO2-) and then to nitrates. So if you’re going to eat certain foods, the nitrites are actually good because they prevent bacteria from forming, such as listeria and botulinum, but too much of a good thing can be an issue. The organic nitrites may be isomeric, but not identical with the corresponding nitro compounds. The Nitrogen Cycle. Nitrites Definition from Encyclopedia Dictionaries & Glossaries. It’s one that the USDA aimed to at least partially correct when it announced on December 10 that it would consider prohibiting inaccurate labeling claims on natural and organic processed meats, and include celery powder and other “naturally” derived nitrites and nitrates in its definition of curing agents. The following article is from The Great Soviet Encyclopedia (1979). Methemoglobin can be detected in blood, yet causative factors, such as exposure to nitrite/nitrate, cannot be identified. snittier Nitrogen cycle The nitrogen cycle is the process by which nitrogen is converted between its various chemical forms. Biofilm Health effects. Bada discovered that the reactions were producing chemicals called nitrites, which destroy amino acids as quickly as they form.. Primordial Soup's On: Scientists Repeat Evolution's Most Famous Experiment - The Panda's Thumb

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