A method of fabricating Group III-V semiconductor metal oxide semiconductor and III-V MOS devices are described. The temperature is determined using nuclear magnetic resonance spectroscopy when the particles are utilized. The filter cartridge provided with a plurality of the described reinforcement structures equally spaced around the circumference of the filter cartridge is also disclosed as is a method for preventing distortion of a multi-cell filter cartridge under arduous operating conditions. The deformable band deters percussion mallets or the like from rolling off the towel when the towel is placed on a music stand that has been set into a generally horizontal position to function as a table.