| Allen, Edgar | <person> U.S. Endocrinologist, 1892-1943. See: Allen-Doisy test, Allen-Doisy unit. (05 Mar 2000) |
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| Allen, Edgar Van Nuys | <person> U.S. Physician, 1900-1961. See: Allen's test. (05 Mar 2000) |
| Allen-Masters syndrome | <syndrome> Pelvic pain resulting from an old laceration of the broad ligament received during delivery. (05 Mar 2000) |
| Allen's test | For phenol: upon the addition of 5 or 6 drops of hydrochloric acid and then 1 of nitric acid to the suspected fluid, a red colour develops. For strychnine: fluid is extracted with ether, which is then evaporated by means of "drop-by-drop" pipetting into a warmed porcelain dish or crucible; the residue is treated with a small bit of manganese dioxide and dilute sulfuric acid; a red-blue or violet colour develops if strychnine is present. Origin: A.H. Allen A test for radial or ulnar patency; either the radial or ulnar artery is digitally compressed by the examiner after blood has been forced out of the hand by clenching it into a fist; failure of the blood to diffuse into the hand when opened indicates that the artery not compressed is occluded. Origin: Edgar Van Nuys Allen (05 Mar 2000) |
| Allen video enhanced contrast | <procedure> A method for enhancing microscopic images pioneered by R D Allen. The digitised image has the background (an out of focus image of the same microscopic field with comparable unevenness of illumination etc.) subtracted and the contrast expanded to utilise the potential contrast range. Interestingly, it is possible to produce images of objects that are below the theoretical limit of resolution microtubules for example. (18 Nov 1997) |
| Allen, Willard | <person> U.S. Gynecologist, *1904. See: Corner-Allen test, Corner-Allen unit, Allen-Masters syndrome. (05 Mar 2000) |
| Whipple, Allen | <person> U.S. Surgeon, 1881-1963. See: Whipple's operation. (05 Mar 2000) |
| Corner-Allen test | A test for progestational activity; adult female rabbits are mated during estrus and spayed 18 hours later; the test substance is injected subcutaneously on 5 successive days; the minimal amount required to produce complete progestational proliferation of the endometrium is taken as a unit, equivalent to 1.25 mg of progesterone. (05 Mar 2000) |
| Corner-Allen unit | A unit of progestational activity, measured in rabbits; the minimum dose which, divided into five equal daily portions, produces on the sixth day the uterine changes characteristic of the eighth day of normal pregnancy; the unit has about the same potency as the international unit. (05 Mar 2000) |