| qs | as much as will suffice [Lat. quantum sufficit]; sufficient quantity [Lat. quantum satis] |
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| 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 |
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| DQ | Double quantum |
| DQF | Double quantum filtered |
| DQF-COSY | Double-quantum filtered correlation spectroscopy |
| MQMAS | Multiple-Quantum Magic-Angle Spinning |
| quantum speciation | The rapid evolution of a newspecies from a small population that ispartially or totally isolated from the parent population, the rapidspeciation occurs due to geneticdrift and founder effect and usuallyinvolves a few mutations that have a big impact on the organisms' observable physical traits. (09 Oct 1997) |
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| allopatric speciation | <ecology> The evolutionary process through which two geographically separated (and therefore non-interbreeding) populations of the same species become less and less similar to each other over time (via mutation or the success of different traits in each environment) and eventually become distinctly different species. (09 Oct 1997) |
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| speciation | The evolutionary process by which diverse species of animals or plants are formed from a common ancestral stock. (05 Mar 2000) |
| sympatric speciation | <biology, ecology, zoology> The evolutionary process of a single population of a species splitting into two populations which gradually evolve into two different species (as a result of genetic mutation and variation) while both diverging populations still occupy the same geographic area. (19 Jan 1998) |
| quantum | <unit> The fundamental unit of electromagnetic energy. (09 Oct 1997) |
| quantum efficiency | The number of photons required for the formation of one oxygen molecule in photosynthesis. Varies from 8-14 depending on the system used to measure it. (18 Nov 1997) |
| quantum evolution | An extremely rapid evolutionarychange in a single genetic lineage, thought to result from a sudden and radical change in the species'environment. (09 Oct 1997) |
| quantum limit | The shortest wavelength found in an X-ray spectrum. (05 Mar 2000) |
| quantum mottle | Mottle caused by the statistical fluctuation of the number of photons absorbed by the intensifying screens to form the light image on the film; faster screens produce more quantum mottle. (05 Mar 2000) |
| quantum rectum | See: Q.R. Origin: L. However much is correct (05 Mar 2000) |
| quantum requirement | The number of quanta of light absorbed required for the transformation of one molecule; the inverse of the quantum yield. (05 Mar 2000) |
| quantum satis | See: q.s. Origin: L. However much is enough Quantum sink, in radiological imaging, the stage at which statistical information reaches its lowest level because of a low photon flux. (05 Mar 2000) |
| quantum sufficiat | See: q.s. Origin: L. However much is enough (05 Mar 2000) |
| quantum theory | The theory that the radiation and absorption of energy take place in definite quantities called quanta (e) which vary in size and are defined by the equation e=hv in which h is planck's constant and v is the frequency of the radiation. (12 Dec 1998) |
| quantum vis | See: q.v.. Origin: L. However much you wish (05 Mar 2000) |
| quantum yield | The number of photons required for the formation of one oxygen molecule in photosynthesis. Varies from 8-14 depending on the system used to measure it. (18 Nov 1997) |
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