Abstract: A cartridge for use in purification processes, including liquid chromatography, scavenging and reactions, is described. In one embodiment, the cartridge can include a tubular member and at least one porous member fitted within the interior region of the tubular member. The tubular member can have an interior surface forming an interior region and an exterior surface. The exterior surface can include one or more ribs protruding from the exterior surface along at least a portion of the exterior surface, such as longitudinal ribs and/or whole or partial circumferential ribs.

Abstract: Apparatus for chromatography, featuring a composite chromatography column including a tubular member having an inlet end and an outlet end, where the tubular member includes an innermost first layer comprised of a first material and asecond layer comprised of a second material. The chromatography apparatus can also include a first intermediate layer formed from a third material, where at least a portion of the first intermediate layer is disposed between the innermost first layer and the second layer. A second intermediate layer formed from a fourth material, can further be included in the chromatography apparatus, where at least a portion of the second intermediate layer is disposed between the innermost first layer and the second layer. A portion of the second intermediate layer can be disposed between the second layer and the first intermediate layer.

Abstract: A device for punching holes in paper is adapted to be positioned within the binder mechanism of a loose leaf notebook. The device employs an integral receiving base having a bore and cutting aperture. A punch member is slidably disposed within the bore above the aperture and adapted to move in a reciprocal manner in orthogonal relationship to the notebook.