methaemoglobin

methaemoglobin
n.
a substance formed when the iron atoms of the blood pigment haemoglobin have been oxidized from the ferrous to the ferric form (compare oxyhaemoglobin). The methaemoglobin cannot bind molecular oxygen and therefore it cannot transport oxygen round the body. The presence of methaemoglobin in the blood (methaemoglobinaemia) may result from the ingestion of oxidizing drugs or from an inherited abnormality of the haemoglobin molecule. Symptoms include fatigue, headache, dizziness and cyanosis.

Medical dictionary. 2011.

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  • Methaemoglobin — Met h[ae]m*o*glo bin (? or ?), n. [Pref. met + h[ae]moglobin.] (Physiol. Chem.) A stable crystalline compound obtained by the decomposition of hemoglobin. It is found in old blood stains. [1913 Webster] …   The Collaborative International Dictionary of English

  • methaemoglobin — n. a substance formed when the iron atoms of the blood pigment haemoglobin have been oxidized from the ferrous to the ferric form (compare oxyhaemoglobin). The methaemoglobin cannot bind molecular oxygen and therefore it cannot transport oxygen… …   The new mediacal dictionary

  • methaemoglobin — An oxidized form of haemoglobin containing ferric iron that is produced by the action of oxidizing poisons. Non functional …   Dictionary of molecular biology

  • methaemoglobin — /met hee meuh gloh bin, hem euh , hee meuh gloh , hem euh /, n. methemoglobin. * * * …   Universalium

  • methaemoglobin — [ˌmɛθi:mə gləʊbɪn, mɛtˌhi: ] (US methemoglobin) noun Biochemistry a stable oxidized form of haemoglobin which is unable to release oxygen to the tissues. Derivatives methaemoglobinaemia (US methemoglobinemia) noun …   English new terms dictionary

  • methaemoglobin — /mətˌhiməˈgloʊbən/ (say muht.heemuh glohbuhn) noun a brownish compound formed when haemoglobin is oxidised by oxygen. Also, methemoglobin. {met(a) + haemoglobin} Usage: For spelling variation see haemo …  

  • methaemoglobin — /met hee meuh gloh bin, hem euh , hee meuh gloh , hem euh /, n. methemoglobin …   Useful english dictionary

  • Метгемоглобин (Methaemoglobin) — вещество, образующееся в случае, когда присутствующие в пигменте крови гемоглобине атомы железа окисляются с образованием окиси железа (для сравнения: оксигемоглобин). Метгемоглобин не может соединяться с молекулярным кислородом и, следовательно …   Медицинские термины

  • МЕТГЕМОГЛОБИН — (methaemoglobin) вещество, образующееся в случае, когда присутствующие в пигменте крови гемоглобине атомы железа окисляются с образованием окиси железа (для сравнения: оксигемоглобин). Метгемоглобин не может соединяться с молекулярным кислородом… …   Толковый словарь по медицине

  • Oxygen–haemoglobin dissociation curve — The oxygen–haemoglobin dissociation curve (or oxygen–hemoglobin dissociation curve) plots the proportion of haemoglobin in its saturated form on the vertical axis against the prevailing oxygen tension on the horizontal axis. The oxyhaemoglobin… …   Wikipedia

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