H substance

(redirected from released substance)
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H sub·stance

designation given by Thomas Lewis to a diffusible substance in skin, indistinguishable in action from histamine, liberated by injury and causes the triple response.
Synonym(s): released substance
References in periodicals archive ?
Due to the large number, released substances and mixtures were classified into groups of agents posing analogous or similar threats.
Comparing the data on the most frequently released substances with the result of the research conducted by Gajek et al.
Taking into account the type of released substances, the spatial distribution of chemical incidents in any of the voivodeships is not analogous with the distribution for the sum of all events in Poland (Figure 8).
Until 1993, this provision in effect terminated the obligation to report a release at such time as the reporting person no longer knew that the released substance remained in the environment.
For that reason, we examined the Hazardous Substances Emergency Events Surveillance (HSEES) system data to identify frequent locations, released substances, and factors contributing to short-term chemical exposures associated with adverse health consequences experienced by children.
The main objective is to identify the more frequent locations, released substances, and factors contributing to events and thus to guide strategies to reduce the number of such events and associated childhood exposures and injury.
The number of mercury events captured by the HSEES system has been increasing since 1995, and in 1998 mercury was one of the 10 most commonly released substances reported to HSEES.
Defence chiefs sprayed and released substances in London and on the South coast during the Sixties and Seventies.