singlet oxygen


singlet oxygen
(= (1) O2)
An energised but uncharged form of oxygen that is produced in the metabolic burst of leucocytes and that can be toxic to cells.

Dictionary of molecular biology. 2004.

Look at other dictionaries:

  • Singlet oxygen — is the common name used for the two metastable states of molecular oxygen (O2) with higher energy than the ground state triplet oxygen [cite journal title = Physical and chemical properties of singlet molecular oxygen author = David R. Kearns… …   Wikipedia

  • singlet oxygen — a highly reactive, dimagnetic, excited state (1O2) of dioxygen that rapidly decays with the emission of visible light to the paramagnetic (triplet) ground state. Singlet oxygen is thought to be involved in the oxidative killing of ingested… …   Medical dictionary

  • singlet oxygen — noun a metastable state of molecular oxygen that has a slightly higher energy than normal triplet oxygen, and is more chemically reactive …   Wiktionary

  • Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …   Wikipedia

  • oxygen-dependent killing — One of the most important bactericidal mechanisms of mammalian phagocytes involves the production of various toxic oxygen species (hydrogen peroxide, superoxide, singlet oxygen, hydroxyl radicals) through the metabolic burst. Although anaerobic… …   Dictionary of molecular biology

  • oxygen radical — a toxic metabolite of oxygen, such as superoxide or singlet oxygen, capable of damaging microorganisms and normal tissues …   Medical dictionary

  • singlet — [siŋ′glit] n. [< SINGLE, modeled on DOUBLET] 1. Brit. a man s undershirt, esp. a sleeveless one 2. [Austral. & N.Z.] a short sleeved or sleeveless knit top, as a T shirt or tank top 3. any single thing that usually exists in combination;… …   English World dictionary

  • oxygen — 1. A gaseous element, atomic no. 8, atomic wt. 15.9994 on the basis of 12C = 12.0000; an abundant and widely distributed chemical element, which combines with most of the other elements to form oxides and is essential to animal and plant life …   Medical dictionary

  • reactive oxygen species — Oxygen containing radical or reactive ions such as superoxide, singlet oxygen and hydroxyl radicals, the product of the respiratory burst in phagocytes and responsible for bacterial killing as well as incidental damage to surrounding tissue …   Dictionary of molecular biology

  • Allotropes of oxygen — Contents 1 Atomic oxygen 2 Dioxygen 3 Singlet oxygen 4 Ozone …   Wikipedia


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