 Shares of Applied UV Inc. soared more than four-fold in volatile, active trading Tuesday, after the New York-based company, which applies ultraviolet light to destroy airborne pathogens, announced the closing of an acquisition of almost all of the assets of Akida Holdings LLC. The acquisition, by Applied UVs subsidiary SteriLumen Inc., includes all of the rights to make and sell the Airocide System of air disinfection and purification technologies. 