1(of organic molecules) having carbon–carbon double or triple bonds and therefore not containing the greatest possible number of hydrogen atoms for the number of carbons.
- ‘These unsaturated hydrocarbons are readily oxidised and polymerised, which can reduce the oil's shelf life.’
- ‘Thus conjugation can occur in molecules in which the unsaturated sites are close in space but are separated by more than a single covalent bond.’
- ‘In common with all unsaturated hydrocarbons hydrogen can be added across the double bond to produce ethane.’
- ‘When unsaturated organic compounds are used as the starting point the alcohol is made by the addition of water to the double or triple bond.’
- ‘The unsaturated benzene ring readily reacts with halogens, rapidly discoloring bromine water.’
- 1.1 Denoting fats containing a high proportion of fatty acid molecules with at least one double bond, considered to be healthier in the diet than saturated fats.
- ‘There are two basic kinds of fat: saturated and unsaturated.’
- ‘True, pistachios are fatty, but most of the fat is of the desirable unsaturated kind.’
- ‘Most of the fat in peanuts is unsaturated which has been shown to lower one's LDL-cholesterol levels.’
- ‘The fat is mainly unsaturated, so potentially healthful, although all fats are equally high in calories (nine calories per gram).’
- ‘The vitamin E requirement has long been known to increase with increased intakes of unsaturated fats.’
We take a look at several popular, though confusing, punctuation marks.