| 释义 |
oxidation
ox·i·da·tion O0206100 (ŏk′sĭ-dā′shən)n.1. The combination of a substance with oxygen.2. A reaction in which the atoms of an element lose electrons and the valence of the element is correspondingly increased.
[French, from oxider, to oxidize, from oxide, oxide; see oxide.]
ox′i·da′tive adj.ox′i·da′tive·ly adv.oxidation (ˌɒksɪˈdeɪʃən) n (Chemistry) a. the act or process of oxidizingb. (as modifier): an oxidation state; an oxidation potential. ˌoxiˈdational adj ˈoxiˌdative adjox•i•da•tion (ˌɒk sɪˈdeɪ ʃən) also ox•i•di•za•tion (-dəˈzeɪ ʃən)
n. 1. the process or result of oxidizing. 2. the deposit that forms on the surface of a metal as it oxidizes. [1785–95] ox′i•da`tive, adj. ox·i·da·tion (ŏk′sĭ-dā′shən)1. The chemical combination of a substance with oxygen.2. A chemical reaction in which an atom or ion loses electrons, thus undergoing an increase in valence. Removing an electron from an iron atom having a valence of +2 changes the valence to +3. Compare reduction.Did You Know? If you've ever seen rust, you've seen oxidation. If you've ever watched a candle burn, you've seen oxidation. And if you've ever breathed, which is a good bet, you've experienced oxidation. In all these cases, oxygen is added to another substance. Rust is oxygen reacting with iron, and both burning and breathing involve oxygen reacting with carbon to free up energy stored in chemical bonds. Perhaps you have seen movies in which people are trapped in a confined space like a mine. They might light a match to see, but the burning flame uses up the same oxygen they need to survive. Rust can be thought of as burning that happens incredibly slowly. Oxygen takes electrons from whatever it is oxidizing, so chemists also use the word oxidation to describe what happens to any substance that loses electrons to another substance.oxidation1. A substance is oxidized if it gains oxygen, loses hydrogen, or loses electrons.2. A chemical reaction involving loss of electrons. In the human body, oxidation occurs when breathed-in oxygen combines with molecules in food to produce energy, water, and carbon dioxide.Thesaurus| Noun | 1. |  oxidation - the process of oxidizing; the addition of oxygen to a compound with a loss of electrons; always occurs accompanied by reductionoxidisation, oxidizationcalcination - the conversion of metals into their oxides as a result of heating to a high temperaturechemical reaction, reaction - (chemistry) a process in which one or more substances are changed into others; "there was a chemical reaction of the lime with the ground water"combustion, burning - a process in which a substance reacts with oxygen to give heat and lightnitrification - the oxidation of ammonium compounds in dead organic material into nitrates and nitrites by soil bacteria (making nitrogen available to plants)rusting, rust - the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water |
Translations
Oxidation
oxidation[‚äk·sə′dā·shən] (chemistry) A chemical reaction that increases the oxygen content of a compound. A chemical reaction in which a compound or radical loses electrons, that is in which the positive valence is increased. Oxidation in the most limited sense, the combining of any substance with oxygen. Generally speaking, “oxidation” describes any chemical reaction that basically involves the removal of electrons from atoms or ions. The most important common oxidizing agents are oxygen (O2), ozone (O3), hydrogen peroxide (H2O2), chlorine (Cl2), fluorine (F2), potassium permanganate (KMnO4), perchloric acid (HClO4), and nitric acid (HNO3). oxidationReaction of a chemical compound with oxygen, as in a paint film in which oil reacts with oxygen to form a hard dry film.oxidation
oxidation [ok″sĭ-da´shun] the act of oxidizing or state of being oxidized. Chemically it consists of the increase of positive charges on an atom or the loss of negative charges. Univalent oxidation indicates loss of one electron; divalent oxidation, the loss of two electrons. The opposite reaction to oxidation is reduction. adj., adj ox´idative.ox·i·da·tion (ok'si-dā'shŭn), 1. Combination with oxygen. 2. Increasing the valence of an atom or ion by the loss from it of hydrogen or of one or more electrons thus rendering it more electropositive, as when iron is changed from the ferrous (2+) to the ferric (3+) state. 3. In bacteriology, the aerobic dissimilation of substrates with the production of energy and water; in contrast to fermentation, the transfer of electrons in the oxidation process is accomplished through the respiratory chain, which uses oxygen as the final electron acceptor. oxidation The combination of a molecule with oxygen, which increases the atom’s valence with the loss of a hydrogen ion or one or more electrons. Oxidation reactions commonly involve the combination with oxygen free radicals, and result in major organ damage that accumulates with time; they are implicated in age-related damage, degenerative phenomena and cancer, and may be ameliorated with antioxidants, including vitamin C, vitamin E, glutathione and superoxide dismutase.ox·i·da·tion (ok'si-dā'shŭn) 1. Combination with oxygen; increasing the valence of an atom or ion by the loss from it of hydrogen or of one or more electrons. 2. bacteriology The aerobic dissimilation of substrates with the production of energy and water; the transfer of electrons is accomplished through the respiratory chain, which uses oxygen as the final electron acceptor. oxidation - the addition of oxygen to a substance to increase the proportion of oxygen in its molecule. Oxidation can be achieved without oxygen by the removal of hydrogen (dehydrogenation).
- any reaction involving loss of electrons from an atom. For example,
 OxidationWhen a chemical element or compound loses an electron.Mentioned in: Methemoglobinemiaox·i·da·tion (ok'si-dā'shŭn) Combination with oxygen; increasing the valence of an atom or ion by the loss from it of hydrogen or of one or more electrons. oxidation
Related to oxidation: oxidation number, oxidation stateSynonyms for oxidationnoun the process of oxidizingSynonymsRelated Words- calcination
- chemical reaction
- reaction
- combustion
- burning
- nitrification
- rusting
- rust
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