| 释义 |
Definition of aldehyde in English: aldehydenoun ˈaldɪhʌɪdˈældəˌhaɪd Chemistry An organic compound containing the group —CHO, formed by the oxidation of alcohols. Typical aldehydes include methanal (formaldehyde) and ethanal (acetaldehyde). Example sentencesExamples - Included among these compounds are some of the best known of all chemical families, including the hydrocarbons, alcohols, ethers, aldehydes and ketones, and organic acids.
- The fumes also contain sulfur dioxide, and various aldehydes, primarily formaldehyde as well as acetaldehyde and acrolein.
- Water, ethanol, volatile organic acids, aldehydes, esters, acetals, and ketones, many of them powerfully aromatic, are among the azeotrope components in wines.
- Oxidation of an aldehyde breaks the double bond within the carbonyl group to give a carboxylic acid.
- Over time, however, it oxidizes and chemically degrades to form alcohols, ketones, aldehydes, acids and esters.
Derivatives adjective ˌaldɪˈhɪdɪk Chemistry Oxidized wines smell flat and aldehydic. Example sentencesExamples - They were then treated with 0.5 M NH 4 Cl in phosphate buffer for 2 h to block free aldehydic groups.
- Reactions that occur between the aldehydic groups and other amino acids of adjoining molecules lead to cross-links between the molecules and the self-assembly into fibers.
- The components have high absorption characteristics resulting from the presence of carboxylic, hydroxylic, and aldehydic functional groups.
- The aldehydic proton gives a strongly deshielded resonance signal in the H - 1 NMR spectrum.
Origin Mid 19th century: shortened from Latin alcohol dehydrogenatum 'alcohol deprived of hydrogen'. Definition of aldehyde in US English: aldehydenounˈaldəˌhīdˈældəˌhaɪd Chemistry An organic compound containing the group —CHO, formed by the oxidation of alcohols. Typical aldehydes include methanal (formaldehyde) and ethanal (acetaldehyde). Example sentencesExamples - Oxidation of an aldehyde breaks the double bond within the carbonyl group to give a carboxylic acid.
- Over time, however, it oxidizes and chemically degrades to form alcohols, ketones, aldehydes, acids and esters.
- Water, ethanol, volatile organic acids, aldehydes, esters, acetals, and ketones, many of them powerfully aromatic, are among the azeotrope components in wines.
- Included among these compounds are some of the best known of all chemical families, including the hydrocarbons, alcohols, ethers, aldehydes and ketones, and organic acids.
- The fumes also contain sulfur dioxide, and various aldehydes, primarily formaldehyde as well as acetaldehyde and acrolein.
Origin Mid 19th century: shortened from Latin alcohol dehydrogenatum ‘alcohol deprived of hydrogen’. |