Part III. Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free! The scientific study of life. Nitrogen cycle is a complex process involving five steps: nitrogen fixation, nitrification, assimilation, ammonification and denitrification. We Asked, You Answered. What is the Nitrogen cycle? It is a component of all proteins, making it essential for life, and it is also found in various minerals. Nitrogen gas synonyms, Nitrogen gas pronunciation, Nitrogen gas translation, English dictionary definition of Nitrogen gas. The third step in nitrogen … All rights reserved. Test Your Knowledge - and learn some interesting things along the way. The conversion of atmospheric nitrogen into NO 2, NO 3, NH 3 with help of lightning and radiation. Why Do “Left” And “Right” Mean Liberal And Conservative? N. A nonmetallic element that makes up about 78 percent of the atmosphere by volume, occurring as a colorless, odorless gas. Nitrogen fixation involves conversion of gaseous nitrogen to ammonia (NH3 or NH4+), through biological fixation or nitrate through a physical process involving high energy. nitrogen cycle. Nitrogen fixation Definition: Some cyanobacteria and some methanogens (a group of archaea) convert atmospheric nitrogen. All rights reserved. Well, you couldn't be more wrong! In ammonification, dead plants or animal bodies and their waste products contain nitrogen. The 21st century counterpart to … Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Definition; Process; Key Points; Factors Affecting; Significance; Definition of Nitrification. Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021, Collins English Dictionary - Complete & Unabridged 2012 Digital Edition Nitrogen. The main difference between nitrogen fixation and nitrification is that nitrogen fixation is the conversion of nitrogen gas (N 2) into nitrogen-containing substances, whereas nitrification is the conversion of ammonium ions (NH 4+) to nitrites (NO 2-) and nitrates (NO 3-). Eutrophication: Definition, Causes, Impacts and Control Strategies. As a result, it cannot be used by organisms directly. A drop in a bucket, really. Atomic number 7; atomic weight 14.0067; melting point -209.86°C; boiling point -195.8°C; valence 3, 5. Our mission is to provide a free, world-class education to anyone, anywhere. How overuse of nitrogen-containing fertilizers can cause algal blooms. Its symbol is N. “Capital” vs. “Capitol”: Do You Know Where You’re Going? For instance, the amino acids contain nitrogen and form building blocks that make up various components of the human body such as hair, tissues and muscles. Browse nitrogen cycle explanation with biology terms to study for online university degree programs. In National 4 Biology discover how atmospheric nitrogen is processed by bacteria, allowing plants and animals to build essential proteins. Apart from carbon, hydrogen and oxygen, nitrogen is the most prevalent essential macro-element in living organisms. The element nitrogen is a very unreactive gas. Medical Author: William C. Shiel Jr., MD, FACP, FACR; Urea: A nitrogen-containing substance normally cleared from the blood by the kidney into the urine. But we can't just get nitrogen from the air. Covers the nitrogen cycle. Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012. She has a Bachelor of Science in Biology and a Master of Education. 'Nip it in the butt' or 'Nip it in the bud'. One of the many things that has been pissing off religious zealots for decades. 'All Intensive Purposes' or 'All Intents and Purposes'? Please tell us where you read or heard it (including the quote, if possible). Definition; Process; Key Points; Factors Affecting; Significance; Definition of Nitrification. Ammonification is part of the five-step nitrogen cycle, which is crucial for providing living organisms with the essential nitrogen that they need.Ammonification itself takes place thanks to the existence of decomposers, which break down animal and plant cells into simpler substances, making nutrients available in the ecosystem. Nitrogen is an essential ingredient for life as we know it. The process of ammonification converts organic nitrogen, which is the way nitrogen is contained in compounds in living organisms, into inorganic ammonia (NH 3) or ammonium ions (NH 4+). nitrogen meaning: 1. a chemical element that is a gas with no colour or taste, forms most of the earth's atmosphere…. Denitrification is the last step in the nitrogen cycle where the reduction of soil nitrate to nitrogen-containing gases, such as nitric oxide, nitrous oxide, and nitrogen gas, takes place. He had to return to the conception of the individual particles of oxygen, nitrogen, and water, each a center of repulsion. Nitrogen fixation involves conversion of gaseous nitrogen to ammonia (NH3 or NH4+), through biological fixation or nitrate through a physical process involving high energy. French nitrogène, from nitre niter + -gène -gen. “Nitrogen.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nitrogen. Air, which is 79% nitrogen gas (N 2), is the major reservoir of nitrogen. Ammonification Definition Ammonification is part of the five-step nitrogen cycle, which is crucial for providing living organisms with the essential nitrogen that they need.. Ammonification[edit] When a plant or animal dies or an animal expels waste, the initial form of nitrogen is organic. The Nitrogen Cycle. Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. The name nitrogène was suggested by French chemist Jean-Antoine-Claude Chaptal in 1790 when it was found that nitrogen was present in nitric acid and nitrates. Learn vocabulary, terms, and more with flashcards, games, and other study tools. a colourless odourless relatively unreactive gaseous element that forms 78 per cent (by volume) of the air, occurs in many compounds, and is an essential constituent of proteins and nucleic acids: used in the manufacture of ammonia and other chemicals and as a refrigerant. Plants need nitrogen to build amino acids, proteins, nucleic acids, […] Adenine is often represented by the capital letter A. It is a component of all proteins, making it essential for life, and it is also found in various minerals. Biological nitrogen fixation converts N 2 into ammonia, which is metabolized by most organisms. An… Definition of the Nitrogen Cycle. nitrogen definition: 1. a chemical element that is a gas with no colour or taste, forms most of the earth's atmosphere…. 78% of the atmosphere is made of N2... Plants and animals cannot…. Nitrogen compounds have a very long history, ammonium chloride having been known to Herodotus.They were well known by the Middle Ages. The first step involves the fixation (conversion) of atmospheric inert nitrogen into … 3. The Dictionary.com Word Of The Year For 2020 Is …, “Affect” vs. “Effect”: Use The Correct Word Every Time. See the full definition for nitrogen in the English Language Learners Dictionary, Nglish: Translation of nitrogen for Spanish Speakers, Britannica English: Translation of nitrogen for Arabic Speakers, Britannica.com: Encyclopedia article about nitrogen. However, nitrogen is recycled in a process called the nitrogen cycle. If oxygen is combined with nitrogen, it produces five deadly poisons, viz. Learn Nitrogen cycle definition in biology with explanation to study “What is Nitrogen cycle”. Plants are not able to change it into nitrogen compounds, but it is needed to form proteins. Our mission is to provide a free, world-class education to anyone, anywhere. There are three main pools of nitrogen – atmosphere, soil and biomass. All life requires nitrogen-compounds, e.g., proteins and nucleic acids. Nitrogen cycle: Steps of Nitrogen cycle. this process as performed by certain bacteria found in the nodules of leguminous plants, which make the resulting nitrogenous compounds available to their host plants. We are generally under the impression that we only need oxygen to live. Published by Houghton Mifflin Company. 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