| q.l. | quantum libet; as much as desired; ÇÊ¿äÇÑ ¸¸Å |
|---|---|
| q.s. | quantum satis; sufficient quantity; ÃæºÐÇÑ ¾ç |
| DOFCOSY | double-quantum filtered correlated spectroscopy |
| DOUBTFUL | double quantum transition for finding unresolved lines |
| DQE | detective quantum efficiency |