The invention discloses an analytical strip reading apparatus and the analytical strip used therein. Hydrogel constructs may be used in, for example, multi-lumen nerve regeneration conduits and other tissue engineering scaffolds with embedded channel architecture that facilitate tissue regeneration through possible incorporation of precisely located bioactive agents, cells, and other desired inert andor active chemical agents and devices. The mixing module converts an inbound RF signal into an in-phase mixed signal and a quadrature mixed signal. The slot receives the handle portion of a paintbrush such that the paintbrush is supported in an upright generally vertical position in the paint can. The base member is configured to be easily and painlessly inserted and removed from the pierced areas of the wearer’s body.