A pump for boosting pressure of liquid color for injection into plastic resin in molding or extrusion apparatus includes a housing having a first bore extending in a first direction and second and third bores extending through the housing and communicating with the first bore proximate a first end of the first bore with the first end of the first bore being blind. At least one chelator such as crown ether is attached to a polymer and then associated with another polymer such as DNA. While being raised, prior to being folded rearwardly, the wing assemblies may be supported by the central boom, which is rigidly coupled to a central frame. A down terminal and an up terminal are used to connect the operation switch and the microcomputer to each other. A second portion of an outer surface of the light pipe has a radius of curvature which differs from the radius of curvature of the first portion of the outer surface. The plug comprises a peripheral wall adapted to sealingly engage the skirt of the globe and has an upper end thereof and a flexible diaphragm having an upper surface and a recessed channel around the periphery thereof connected to the wall and extending across the upper end of the wall.