| 词汇 | isomer |
| 释义 | isomer noun[ C ] chemistry specializeduk /ˈaɪ.sə.mər/ us /ˈaɪ.soʊ.mɚ/ any one of a group of chemical substances which all have the same number and type of atoms but in which the arrangement of the atoms is slightly different between each substance: （同分）异构体 structural/geometrical/optical isomers结构／几何／光学同分异构体 Chemistry: types of chemical acid salt aerogel albumin alkali metal alkaline alkaloid antioxidant carbohydrate homologous series inorganic isopropanol ketone lectin melamine monosaccharide mothball propellant saline soluble weak base isomer | American Dictionaryisomer noun[ C ] us/ˈɑɪ·sə·mər/ chemistry any one of a group of chemical substances which all have the same number and type of atoms but in which the arrangement of the atoms is slightly different between each substance Examples of isomerisomer An experimental perspective on triggering gamma emission from nuclear isomers. These studies investigate under-well defined physico-chemical conditions synthetic routes how the simplest carbon hydrate-glycolaldehyde-and the simplest amino acid-glycine-together with their isomers can be formed. In the other isomers, where the two groups are linked together, the carbonyl group attracts the electrons, which destabilizes the protonated amine. If both the isomers are separated, yields decrease by 50 %, if they are not separated, distance distributions are broadened. As can clearly be seen, the mass spectra show that the fragmentation patterns between the isomers are different for both wavelengths and polarizations. The suffixes "-c" for cis and "-t" for trans refer to geometric isomers. Consequently, the same isomers were studied as before, first protonated on the acid group, then on the amine group. In particular, the possibility of exciting the nuclear states in longer-living isomers via the action of the laser-produced plasma is extremely attractive. The detailed kinetic scheme should include transitions between many conformational isomers of the protein chain. Non-linear excitation and decay of low-energy nuclear isomers produced under femtosecond laser-plasma interactions. In earlier literature the different stacking forms were referred to as isomers. Visual pigment reconstitution in intact goldfish retina using synthetic retinaldehyde isomers. This is crucial when more isomers with the same gross formula, but different enthalpy of formation, can be produced. Linear isomers constitute 89 % of the dimer and 67 % of the trimer fractions. Mixtures of retinal1 and retinal2 standards were co-chromatographed with an aliquot of retinal oximes to identify isomers. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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