nitrogen metabolism

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• Nitrogen fixation — is the natural process, either biological or abiotic, by which nitrogen (N2) in the atmosphere is converted into ammonia (NH3).[1] This process is essential for life because fixed nitrogen is required to biosynthesize the basic building blocks of …   Wikipedia

• Nitrogen nutrition in the arbuscular mycorrhizal system — Contents 1 Role of nitrogen 1.1 Mechanism of action 1.2 Community and ecology 1.3 Alternate theories …   Wikipedia

• Nitrogen assimilation — is a fundamental biological process that occurs in plants and algae that are incapable of independent nitrogen fixation. The assimilation of nitrogen has marked effects on plant productivity, biomass, and crop yield, and nitrogen deficiency leads …   Wikipedia

• metabolism — /meuh tab euh liz euhm/, n. 1. Biol., Physiol. the sum of the physical and chemical processes in an organism by which its material substance is produced, maintained, and destroyed, and by which energy is made available. Cf. anabolism, catabolism …   Universalium

• Nitrogen cycle — Schematic representation of the flow of nitrogen through the environment. The importance of bacteria in the cycle is immediately recognized as being a key element in the cycle, providing different forms of nitrogen compounds assimilable by higher …   Wikipedia

• Nitrogen narcosis — Inert gas narcosis [Nitrogen narcosis] Classification and external resources Divers breathe a mixture of oxygen, helium and nitrogen for deep dives to avoid the effects of narcosis. A cylinder label shows the maximum operating depth and mixture… …   Wikipedia

• Nitrogen deficiency — A young cabbage plant exhibiting nitrogen deficiency. This is about nitrogen compounds in plant nutrition. For shortage of nitrogen compounds in human and animal nutrition, see protein deficiency. All plants require sufficient supplies of… …   Wikipedia

• Metabolism — Cell metabolism redirects here. For the journal, see Cell Metabolism. Structure of adenosine triphosphate, a central intermediate in energy metabolism Metabolism (from Greek: μεταβολή metabolē , change or Greek: μεταβολισμός metabolismos,… …   Wikipedia

• Nitrogen — carbon ← nitrogen → oxygen ↑ N ↓ P …   Wikipedia

• nitrogen fixation — 1. any process of combining atmospheric nitrogen with other elements, either by chemical means or by bacterial action: used chiefly in the preparation of fertilizers, industrial products, etc. 2. this process as performed by certain bacteria… …   Universalium

• nitrogen-13 — A cyclotron produced, positron emitting radioisotope of nitrogen with a half life of 9.97 minutes; used in protein metabolism studies and in positron emission tomography …   Medical dictionary