Erg: From 4 Different Sources
A pre?x indicating activity or work.
n. a unit of work or energy equal to the work done when the point of application of a force of 1 dyne is displaced through a distance of 1 centimetre in the direction of the force. 1 erg = 10?7 joule.
see electroretinography.
(ergo-) combining form denoting work or activity.
A combination of CALCIFEROL and vitamin D2 (see APPENDIX 5: VITAMINS) given to prevent or cure RICKETS, a de?ciency disorder caused by the lack of calcium and vitamin D in the diet.... ergocalciferol
An active constituent of ergot, it has a powerful action in controlling the excessive bleeding from the UTERUS which may occur after childbirth. The o?cial British Pharmacopoeia preparation is ergometrine maleate.... ergometrine
One of the alkaloids in ergot. In the form of ergotamine tartrate it is usually given orally to treat MIGRAINE, but treatment carries a risk and should be medically supervised.... ergotamine
A broad science involving the application of psychological and physiological principles to the study of human beings in relation to their work and working surroundings. It includes the design of buildings, machinery, vehicles, and anything else with which people have contact in the course of their work.... ergonomics
A sterol found in yeasts and fungi and in plant and animal fat. Under the action of sunlight or ultraviolet rays it produces vitamin D2. The substance produced in this way is known as calciferol, and is used for the prevention and cure of RICKETS and OSTEOMALACIA. A similar change in the ergosterol of the skin is produced when the body is freely exposed to sunlight. Calciferol is probably not so active as, and di?ers chemically from, the vitamin D occurring in ?sh-liver oils. (See APPENDIX 5: VITAMINS.)... ergosterol
See ERGOT POISONING.... ergotism
Ergot poisoning, or ergotism, occasionally results from eating bread made from rye infected with the fungus, Claviceps purpurea. Several terrible epidemics (St Anthony’s Fire), characterised by intense pain and hallucinations, occurred in France and Germany during the Middle Ages (see ERYSIPELAS). Its symptoms are the occurrence of spasmodic muscular contractions, and the gradual production of gangrene in parts like the ?ngers, toes and tips of the ears because of constriction of blood vessels and therefore the blood supply.... ergot poisoning
n. an apparatus for recording the work performed by the muscles of the body when undergoing activity. Ergographs are useful for assessment of the capabilities of athletes undergoing training.... ergograph