An object of the present invention is to provide a refrigerant in which an odorant is added, the odorant being compatible with refrigerants and refrigerating device oils, and having no reactivity with refrigerating device oils and materials forming refrigerating circuits, and to provide a refrigerating device in which the refrigerant is circulated in the refrigerating circuit. A row of venturi slots commences inside the airfoil at the cooling circuit and terminates near the trailing edge. The housing comprises one of a rectangular or rounded housing with an elongated slot therealong to dispense individual sheets of material. Preferably the single stranded nucleotide region is comprised of a single nucleotide whose associated nucleotide base is one of the characteristic of the nucleotides bases found in DNA or RNA. Control of the thickness may be effected through use of spacers embedded into the ablative coating an formed of the same or similar material previously cured prior to placement in the mold.