isomer
/ˈʌɪsəmə
/noun
1 Chemistry Each of two or more compounds with the same formula but a different arrangement of atoms in the molecule and different properties.However, several research groups have suggested cis isomers of lycopene are better absorbed than the all-trans form....
- Conjugated linoleic acid is a mixture of positional and geometric isomers of linoleic acid.
- In 1907, he synthesized a pair of geometric isomers that confirmed his predictions.
2 Physics Each of two or more atomic nuclei that have the same atomic number and the same mass number but different energy states.Constitutional isomers are isomers that have different atomic connectivities....
- One form is called the (+) isomer because it rotates polarized light to the right, in a positive direction.
- The article proclaimed the dawn of the age of atomic aircraft powered by hafnium-178 isomer reactors.
Derivatives
isomeric
/ adjective ...- There is also a significant difference according to the isomeric structure (a = Rp or b = Sp) for the samples 1a, b and 2a, b.
- At very high temperatures, part of the Lu decay to Hf bypasses the conventional slow route, and goes into an isomeric state which has a half-life of only 3.68 hours.
- The results reveal that metal cation binding affects the protein conformation, the retinal isomeric composition as well as lipid head groups.
isomerism
/ noun ...- The authors concluded that this isomerism could explain the differential biological effects of CHH (hyperglycemia and molt-inhibition).
- The second major type of isomerism is stereoisomerism.
- This chain disorder results from trans-gauche isomerism about the C-C bonds in the lipid chains.
isomerize
- After binding to a blunt DNA end to form an initiation complex, the complex isomerizes to one of several possible unwinding states.
- In response to absorption of a photon, the 11-cis-retinal isomerizes to the all-trans conformation, inducing helix 3 to shift toward the extracellular side.
- Cannabidiol is extracted from fiber cannabis and isomerized to dronabinol.
Origin
Mid 19th century: from Greek isomerēs 'sharing equally', from isos 'equal' + meros 'a share'.