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Phenolphthalein (/ fɛˈnɒl (f) θəliːn / [citation needed]feh-NOL (F)-thə-leen) is a chemical compound with the formula C 20 H 14 O 4 and is often written as " HIn ", " HPh ", " phph " or simply " Ph " in shorthand notation. Phenolphthalein is often used as an indicator in acid–base titrations. For this application, it turns colorless in ...
Figure B shows lungs with asbestos-related diseases, including pleural plaque, lung cancer, asbestosis, plaque on the diaphragm, and mesothelioma. All types of asbestos fibers are known to cause serious health hazards in humans. [1][2][3] The most common diseases associated with chronic exposure to asbestos are asbestosis and mesothelioma.
The pictogram for harmful substances of the Globally Harmonized System of Classification and Labelling of Chemicals.. The Globally Harmonized System of Classification and Labelling of Chemicals (GHS) is an internationally agreed-upon standard managed by the United Nations that was set up to replace the assortment of hazardous material classification and labelling schemes previously used around ...
[2] [1] Fixed-dose combinations of theophylline and ephedrine were abandoned after the 1970s as they did not allow for dose titration in asthma therapy owing to the toxicity of ephedrine. [ 19 ] The effects of theophylline/ephedrine as a performance-enhancing drug in exercise and sports have been studied.
Polyphenols (/ ˌpɒliˈfiːnoʊl, - nɒl /) are a large family of naturally occurring phenols. [ 1 ] They are abundant in plants and structurally diverse. [ 1 ][ 2 ][ 3 ] Polyphenols include phenolic acids, flavonoids, tannic acid, and ellagitannin, some of which have been used historically as dyes and for tanning garments.
It is calculated using the LD50 or LC50. [ 1 ] The Occupational Safety and Health Administration (OSHA) regulation (1910.134 (b)) defines the term as "an atmosphere that poses an immediate threat to life, would cause irreversible adverse health effects, or would impair an individual's ability to escape from a dangerous atmosphere."
Acute toxicity. Acute toxicity describes the adverse effects of a substance that result either from a single exposure [1] or from multiple exposures in a short period of time (usually less than 24 hours). [2] To be described as acute toxicity, the adverse effects should occur within 14 days of the administration of the substance.
Categories of organisms commonly used for assessing environmental toxicity. Environmental toxicology is a multidisciplinary field of science concerned with the study of the harmful effects of various chemical, biological and physical agents on living organisms. [ 1 ][ 2 ] Ecotoxicology is a subdiscipline of environmental toxicology concerned ...