This document provides methods and materials related to rare earth particles such as rare earth nanorods. Each of the wings of the mounting seat is formed with an elastic protrusion that abuts resiliently against the top wall portion of a respective one of the retaining walls. The system further includes manipulators for moving the radiation source and the radiation detectors in a coordinated fashion. The second portion of the wad structure is a shot container having a tubular cylindrical body with open rear and front ends and contains the charge of pellets and is dimensioned to be slidably received within the base wad. The formulation comprises an aqueous medium, a drug in solid particulate form in a therapeutically effective amount suspended in the medium, and one or more wetting andor suspending agents in an amount effective to provide controlled flocculation of the drug, at least one ingredient of the formulation being susceptible to oxidative degradation. The foot elevator comprising an inflatable material that describes a compound prismatoid when deployed, an air pump for inflating the foot elevator, an electric operated vibrator that can provide movement of the surface of the foot elevator during use.