| median lethal dose |
Statistically derived single dose of a chemical that can be expected to cause death in 50% of a given population of organisms under a defined set of experimental conditions. This figure has often been used to classify and compare toxicity among chemicals but its value for this purpose is doubtful. A commonly used classification of this kind is as follows: Category..........................................LD50 Orally to Rat (mg/kg body weight) Very toxic....................................... ...
출처: www.bio.hw.ac.uk/edintox/glossall.htm
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| median lethal dose |
50 ) The statistically derived single dose of a chemical that can be expected to cause death in 50 per cent of a given population of organisms under a defined set of experimental conditions. This figure has often been used to classify and compare toxicity among chemicals but its value for this purpose is doubtful. A commonly used classification of this kind is as follows:Category LD 50 Orally to a Rat (mg/kg body weight)Very Toxic: less than 25 Toxic: from 25 to 200Harmful: from 200 to 2000. ...
출처: www.bseinquiry.gov.uk/report/volume16/gloss3.htm
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| median lethal dose |
When comparing the effects of various types or circumstances, that dose which is lethal to 50% of a given population is a very useful parameter. The term is usually defined for a specific time, being limited, generally, to studies of acute lethality. The common time periods used are 30 days or less for most small laboratory animals and to 60 days for large animals and humans. It should be understood that the LD 50 assumes that the individuals did not receive other injuries or medical treatment.
출처: www.kids.net.au/encyclopedia-wiki/nu/Nuclear_fallo...
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