Matches in SemOpenAlex for { <https://semopenalex.org/work/W2401080119> ?p ?o ?g. }
- W2401080119 abstract "Synopsis--Tests for PERCUTANEOUS ABSORPTION are needed principally for substances that are toxic or biologically active or which accumulate in body tissues. The most sensitive SPECIES for percutaneous absorption tests are the rabbit and the guinea-pig. The technique most widely applicable is the measurement by ANALYTICAL or ISOTOPE techniques of the rate of DISAPPEARANCE of a test substance from the site of its topical application. Urine examination or measurement of blood levels may be useful in certain circumstances. IN VITRO measurements are often useful as a guide to the planning of IN VIVO tests. The principal barrier against percutaneous absorption is the STRATUM CORNEUM. Water and water-soluble substances traverse this layer with difficulty while LIPID-SOLUBLE substances do so with less difficulty. Substances that are soluble in both water and lipids (amphipathic) penetrate readily. Vehicles may retard or enhance percutaneous absorption in relation to their water-lipid solubility. They may also enhance absorption by increasing the permeability of the stratum corneum. In the case of OINTMENTS, partition of the test substances between vehicle and stratum corneum is often an important factor influencing absorption. Temperature and pH of the test preparations are additional factors that influence absorption." @default.
- W2401080119 created "2016-06-24" @default.
- W2401080119 creator A5014247222 @default.
- W2401080119 creator A5027698828 @default.
- W2401080119 date "1972-01-01" @default.
- W2401080119 modified "2023-09-24" @default.
- W2401080119 title "Methods of measuring, and factors affecting, percutaneous absorption" @default.
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