| BM | Bachelor of Medicine; barium meal; basal medium; basal metabolism; basement membrane; basilar membra... |
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| magneton | A unit of measurement of the magnetic moment of a particle (e.g., atom or subatomic particle). Bohr magneton, a constant in the equation relating the difference in energies between parallel and antiparallel spin alignments of electrons in a magnetic field; the net magnetic moment of one unpaired electron; used in electron spin resonance spectrometry for detection and estimation of free radicals. Synonym: electron magneton. (05 Mar 2000) |
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| nuclear magneton | A constant in the equation relating the difference in energies between parallel and antiparallel spin alignments of atomic nuclei in a magnetic field; used in nuclear magnetic resonance spectrometry. (05 Mar 2000) |
| electron magneton | bohr magneton |
| Bohr, Christian | <person> Danish physiologist, 1855-1911. See: Bohr effect, Bohr's equation. (05 Mar 2000) |
| Bohr effect | <physiology> Decrease in oxygen affinity of haemoglobin when pH decreases or concentration of carbon dioxide increases. (18 Nov 1997) |
| Bohr, Neils | <person> Danish physicist and Nobel laureate, 1885-1962. See: Bohr's atom, Bohr magneton, Bohr's theory. (05 Mar 2000) |
| Bohr's atom | A concept or model of the atom in which the negatively charged electrons move in circular or elliptical orbits around the positively charged nucleus, energy being emitted or absorbed when electrons change from one orbit to another. (05 Mar 2000) |
| Bohr's equation | An equation to calculate the respiratory dead space from the fact that gas expired from the lungs is a mixture of gas from the dead space and gas from the alveoli, i.e., the dead space volume divided by the tidal volume equals the difference between alveolar and mixed expired gas composition, divided by the difference between alveolar and inspired gas composition; gas composition can be expressed in any consistent units of concentration or partial pressure of oxygen or carbon dioxide. (05 Mar 2000) |
| Bohr's theory | That spectrum lines are produced 1) by the quantised emission of radiant energy when electrons drop from an orbit of a higher to one of a lower energy level, or 2) by absorption of radiation when an electron rises from a lower to a higher energy level. (05 Mar 2000) |
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