Provided is a biosensor having i) sufficient sensitivity allowing quantitative detection of a low concentration of an analyte; and ii) excellent selectivity allowing selective distinction of the presence of an analyte. The initial set of spectral coefficients are spectrum filled. The turret components include respective interior light transmitting channels that communicate when the components are interengaged. In some embodiments a directory server is used for editing user profiles and programming connected Internet-capable radios. A test power circuit is coupled to the first probe and adapted to deliver test power to the first probe. A fungicidal composition comprising a compound of general formula.