A game tracking device used in combination with a hunting arrow, the device having an elongated adaptor insert positionable between the arrowhead and shaft of the hunting arrow, the insert being provided with a recess to receive a transmitter that emits a locator signal. The air jets and sifting screens are arranged in a cross sectionally stair step pattern in which the tread of each stair is the screen and the riser of the each stair has the air jet located thereon. The scaler slots may enable the scaler positioning module to operate in three modes. Also described are novel compositions of d-threo methylphenidate hydrochloride. The rotating linear probe is composed of a plurality of individual vibrator elements which are arranged at regular intervals behind one another. Functionalized hyaluronic acid hydrogels of this invention can be polymerized in situ, are biodegradable, and can serve as a tissue adhesive, a tissue separator, a drug delivery system, a matrix for cell cultures, and a temporary scaffold for tissue regeneration.