A process for the treatment of light naphtha hydrocarbon streams is disclosed wherein the mercaptans contained therein are reacted with diolefins simultaneous with fractionation into a light stream and a heavy stream. A parameter storage section stores a plurality of image synthesis parameter groups representing the correspondence between the camera images and the synthesized image and having different spatial or temporal resolution relations. embedded in an electronic stethoscope with a digital readout of an estimated heart rate. The MD coils may be fabricated on a printed circuit board, which may be at a non-normal angle with respect to a central axis of the V-dipole antenna.