nitrous oxide
nitrous oxide
nitrous oxide
ni′trous ox′ide
n.
nitrous oxide
Noun | 1. | nitrous oxide - inhalation anesthetic used as an anesthetic in dentistry and surgery |
单词 | nitrous oxide | |||
释义 | nitrous oxidenitrous oxidenitrous oxideni′trous ox′iden. nitrous oxide
nitrous oxidenitrous oxideornitrogen (I) oxide,chemical compound, N2O, a colorless gas with a sweetish taste and odor. Its density is 1.977 grams per liter at STP. It is soluble in water, alcohol, ether, and other solvents. Although it does not burn, it supports combustion since it decomposes into oxygen and nitrogen when heated. The gas is prepared commercially by the thermal decomposition of ammonium nitrate, NH4NO3, at about 240°C; to produce nitrous oxide and water; the reaction must be carefully controlled to prevent explosive decomposition of the nitrous oxide. The gas is purified, liquified by compressing and cooling it, and stored in metal cylinders. A major use of nitrous oxide is in anesthesia, e.g., in dentistry. It is commonly called laughing gas since it produces euphoria and mirth when inhaled in small amounts. It is also used in making certain canned pressurized foods, e.g., instant whipped cream. Nitrous oxide was discovered (1772) by Joseph Priestley, who called it "diminished nitrous air"; he prepared it from "nitrous air" (nitric oxide, NO) by treatment with iron powder or a mixture of iron and sulfur powders. Its properties were further studied (1799) by Sir Humphry DavyDavy, Sir Humphry,1778–1829, English chemist and physicist. The son of a woodcarver, he received his early education at Truro and was apprenticed (1795) to a surgeon-apothecary at Penzance. ..... Click the link for more information. . Nitrous Oxidelaughing gas, one of the oxides of nitrogen. It is used as medicine in a mixture with oxygen to induce inhalation narcosis in surgical operations and childbirth, and sometimes in myocardial infarction. It was called laughing gas by the English chemist H. Davy, who, while experimenting on himself to study the effect of nitrous oxide (1799), observed excitation in the initial phase, accompanied by laughter and chaotic body movements, and, in the following phase, unconsciousness. nitrous oxide[′nī·trəs ′äk‚sīd]nitrous oxidenitrous oxidenitrous[ni´trus]ni·trous ox·ide(nī'trŭs oks'īd),nitrous oxidenitrous oxideNO2 Anesthesiology The most commonly used inhalation anesthetic Pharmacologic effects Analgesia, delirium, loss of motor control, elation, excitement Used for Pre-operative, short minor surgeryni·trous ox·ide(nī'trŭs ok'sīd)Synonym(s): laughing gas. nitrous oxideA weak anaesthetic and painkilling (analgesic) gas widely used as a vehicle for more potent anaesthetic agents in the maintenance of general anaesthesia. Also known as ‘laughing gas’. The drug is on the WHO official list.Nitrous oxideni·trous ox·ide(nī'trŭs ok'sīd)See NOx nitrous oxide
Synonyms for nitrous oxide
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