In a method for deriving information about a selected monosaccharide or polysaccharide such as glucose or glycogen, a selected modification such as saturation is made of magnetic resonance at a magnetic resonance frequency of protons of hydroxyl groups of the selected monosaccharide or polysaccharide. The corrugation structure of the RF slug of this invention provides the slide-screw tuner, with a single RF slug, the same electromagnetic performances than double slugs slide-screw tuner, i. Each output medium identifier specifies at least one of a plurality of recording media that can be used to store coupon information.