Abstract: A clamp includes a hoop section and actuating elements. The hoop section forms a cavity for holding a tubular object. The hoop section has first and second ends. First and second actuating elements are respectively coupled with the first and second ends of the hoop section. Squeezing the ends of the actuating members together causes the hoop section to expand to facilitate installation of the clamp onto an object to be clamped and removal of the clamp from the object. Thus, the clamping force generated by the clamp is limited by the restoring forces inherent in the shape, sized, and material of the hoop section when the actuating members are released. The actuating members include expansion limiting extensions which contact each other after a prescribed amount of expansion of the hoop section to thereby prevent further expansion, and possible yielding, of the hoop section. The clamp can be employed as an anti-rotation device secured to a syringe of a syringe pump.

Abstract: A filtration device, apparatus, and method of filtration useful for filtering liquid samples are disclosed wherein filtration occurs opposite the direction of centrifugal force. The filtration device is placed within a container that contains the liquid sample to be filtered. Together, the filtration device and the container comprise the filtration apparatus. Centrifugation forces the liquid sample present in the container to enter the filtration device, thereby effecting filtration. The vertical position of the filtration device is fixed within this container during filtration.