Commonly assessed substances for studying metabolic alterations in tissues are lactate, pyruvate, glycerol, glucose, and urea.
Although at one time PEG was thought to be the ideal substance for studies of water stress because it was believed not to have any toxic properties, further research has shown that PEG has deleterious impacts on plants that are unrelated to low water potentials.
These are important criteria for materials to be used as tracer substances for the study of evaporation and mixture formation processes in SI engines.
Test substances for the study were those commonly reported by affected people to cause reactions: common glue, a scented body wash solution, dryer sheet, and for control substances, unscented shampoo and clean air.
The aim of our study was to chemically characterize a set of priority substances in order to systematically select a representative set of heterogeneous substances for experimental studies of their persistence, bioaccumulation and toxicity (PBT).
Methyleugenol, a natural as well as synthesized substance, was nominated for study because it is structurally similar to safrole, a known animal carcinogen.
While some of the respective degradation products of particular GS are recognized as health promoting substances for humans, recent studies also show evidence that namely the 1-methoxy-indol-3-ylmethyl GS might be deleterious by forming characteristic DNA adducts.
The rationale behind such consistency checks would need to allow for different types of pharmaceuticals under evaluation – newly authorized substances, for which few studies are likely to be available, may be more prone to selective outcome reporting bias than publication bias.
Therefore, using a reference substance for transformation studies seems necessary.
Among them, 1- benzofuran-2-yl -2-propylaminopentane BPAP) was selected as a promising candidate substance for further studies.
