polycyclic

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Related to polycyclic hydrocarbons: Polynuclear aromatic hydrocarbons

polycyclic

having two or more usually fused chemical ring structures in their molecule.

polycyclic hydrocarbons
thyroid initiators, i.e. they increase the incidence of thyroid tumors.
References in periodicals archive ?
AHH plays a crucial role in the biotransformation of polycyclic hydrocarbons, the phenolic product of the oxidase reaction being further metabolized by the cytochrome P450-dependent mixed-function oxidase system to highly reactive electrophiles.
This study is one of the first to investigate the effect of developmental age on the skin's capacity to metabolize polycyclic hydrocarbons.
Tests on samples at the council-owned Leckwith allotments in Cardiff uncovered levels of heavy metals and polycyclic hydrocarbons - which can be cancer-causing - significantly above guidelines laid down by both the Food Standards Agency and the Government.
The JRC-IRMM Reference Laboratory for polycyclic hydrocarbons (PAH) is developing and endorsing the harmonisation and standardisation of PAH measurements in the EU.
Short description (5 lines) of planned objectives: The overall objective of the project is to improve air quality by supporting the implementation of the air quality related legislation including Directive 2008/50/EC on ambient air quality and cleaner air for Europe and Directive 2004/107/EC relating to arsenic, cadmium, mercury, nickel and polycyclic hydrocarbons in ambient air.

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