| Quantum |
The energy associated with a photon. |
| Quaternary ammonium salt
|
Salt of the type R4N+ X-. The
positively charged ion contains a nitrogen with a total of four organic substituents (any combination of
alkyl or aryl groups). |
| Quaternary carbon |
A carbon that is directly attached to four other carbons, i.e.
the central C in neopentane, (CH3)4C. |
| Quaternary structure |
Description of the way in which two or more
protein chains, not connected by chemical bonds, are organized into a larger
protein complex. |
| Quinone |
The product of the oxidation of an
ortho or para dihydroxylbenzene derivative.
|