| ERNST | European Resuscitation Nimodipine Study |
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| mACh | muscarinic acethylcholine |
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| Mach, Ernst | <person> Austrian scientist, 1838-1916. See: Mach's band, Mach number. (05 Mar 2000) |
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| Mach effect | The appearance of a light or dark line on a radiograph where there is a concave or convex interface in the subject, a physiological optical form of edge enhancement. See: Mach's band. (05 Mar 2000) |
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| Mach line | The apparent line of contrasting density bordering a soft tissue shadow on a radiograph; it is an optical illusion constructed by the observer's retina. (05 Mar 2000) |
| Mach number | A number representing the ratio between the speed of an object moving through a fluid medium, such as air, and the speed of sound in the same medium. (05 Mar 2000) |
| Mach's band | A relatively bright or dark band perceived in a zone where the luminance increases or decreases rapidly. (05 Mar 2000) |
| Mach Zehnder system | Interferometric system in which the original light beam is divided by a semi transparent mirror: object and reference beams pass through separate optical systems and are recombined by a second semi transparent mirror. Interference fringes are displaced if the optical path difference for the reference beam is greater and this can be compensated with a wedge shaped auxiliary object. The position of the wedge allows the phase retardation of the object to be measured. The Mach Zehnder system was used in a microscope designed by Leitz. (18 Nov 1997) |
| mach-zender interferometer | <radiobiology> This is a variation of the Michelson interferometer which is used mainly in measuring the spatial variation in the refractive index of a gas (or plasma). A Mach-Zender interferometer uses two semi-transparent mirrors and two fully reflective mirrors located at the corners of a rectangle. The incoming beam is split in two at the first semi-transparent mirror, and the two halves of the beam travel along separate paths around the edge of the rectangle, meeting at the opposite corner. Typically one beam is a control, and the other travels through the system under study. The two beams meet at the second semi-transparent mirror, after which they are mixed together and interfere. (09 Oct 1997) |
| magnetic mach number | <physics> A dimensionless number equal to the ratio of the velocity of a fluid to the velocity of Alfven waves in that fluid. (13 Nov 1997) |
| Abbe, Ernst | <person> German mathematician and physicist, professor at Jena, and inventor of much optical apparatus at the Zeiss works. His inventions include the apochromatic objective, the compensating ocular, the Abbe condenser, a well corrected oil-immersion achromatic condenser, the immersion objective, Abbe apertometre, Abbe refractometre, and the drawing camera, he evolved the Abbe theory of resolution and microscope imagery, the numerical aperture formula, and other optical theories. Lived: 1840-1905. (05 Aug 1998) |
| Abbe, Ernst K | <person> German physicist, 1840-1905. See: Abbe's condenser. (05 Mar 2000) |
| Babes-Ernst bodies | Intracellular granules, present in many species of bacteria, which possess a strong affinity for nuclear stains. (05 Mar 2000) |
| Babes-Ernst granule | <microbiology> Metachromatic intracellular deposits of polyphosphate found in Corynebacterium diphtheriae when the bacteria are grown on sub optimal media. The granules stain reddish with methylene blue or toluidine blue. (02 Jan 1998) |
| Beckmann, Ernst | <person> German chemist, 1853-1923. See: Beckmann's apparatus. (05 Mar 2000) |
| Brucke, Ernst von | <person> Austrian physiologist, 1819-1892. See: Brucke's muscle, Brucke's tunic, Brucke-Bartley phenomenon. (05 Mar 2000) |
| Gelle, Marie-Ernst | <person> French otologist, 1834-1923. See: Gelle test. (05 Mar 2000) |
| Reissner, Ernst | <person> German anatomist, 1824-1878. See: Reissner's fibre, Reissner's membrane. (05 Mar 2000) |
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