Alternative methods for determination of local tolerance of chemical substances and final products

An overview is given of alternative local-tolerance tests as used by various laboratories

Light-responsive caffeine transfer through porous polycarbonate

Light-responsive membranes based on a porous polycarbonate (PC) matrix were developed by surface functionalization with spirobenzopyran (SP)-containing polymers. The surface modification was generated by plasma-induced surface graft polymerization. Mass transfer rates of caffeine through these membranes were found to be up to eight times higher under UV irradiation than at daylight