Abstract: An improved tool for coring a portion of one or more hair follicles incorporates a mechanism that translates distal pushing forces that are applied to its handle to concomitant rotational movement of a hollow coring needle. Preferably, the force translation mechanism is realized by a helical threaded interface or a helical square rod interface between a handle and a rotating member that supports the needle. In another aspect, the tool includes a member that supports the hollow coring needle, the member having a cut-out that provides user access to the open proximal end of the needle. The tool can be made disposable by the use of injection molded plastic materials. The hollow coring needle is preferably realized from stainless steel and an anti-wear coating (such as a titanium nitride coating, a zirconium coating, or a diamond coating). In disposable applications, the tool is packaged in a sterilized manner, which avoids the need for the practitioner to sterilize the tool before use.

Abstract: Nitramine propellants absent a pressure exponent shift in the burning rate curves are prepared by matching the burning rate of a selected nitramine or combination of nitramines within 10% of burning rate of a plasticized active binder so as to smooth out the break point appearance in the burning rate curve.