Fuselage sections of an aircraft are joined using splice elements that compensate for gaps caused by mismatches between mating surfaces on the fuselage sections. The analyte inhibits the reaction of the substrate catalyzed by the first enzyme. The flow through air sparge packer is available in one, two and one half and five foot lengths. A buffering layer may be interposed between the optical fiber and the tube. An adjusting mechanism is operable for moving the deflector plate in relation to an internal side of the combine for adjusting a desired parameter or parameters of the deflected flow and for moving the deflector plate to a retracted position when reverse operation of the rotor is desired.