The disclosure concerns an extract of Acanthopanax koreanum and its use. The rack has at least one platform for storing spooled material, a support for maintaining the platform above the floor level, and an axle for rotatably receiving the spools. In addition, the embodiments of the present invention facilitate the detuning of the elongate hose and, for instance, an attached drogue that may oscillate uncontrollably at a resonant frequency in response to aerodynamic forces exerted on the hose and drogue during an in-flight refueling operation. In operation, when used with pneumatic systems, dry refractory material is fed into a hopper of a gunnite machine, introduced into an air flow, and conveyed by air through one or more hoses to a nozzle.