Various gel springs can be constructed for cushioning purposes. The other end of the cylinder is closed. This mating signals that the dental implant is in the proper rotational position and depth. Further disclosed is a food product which includes Mortierella sect. In addition, the carbon concentration of the first compound semiconductor layer is greater than or equal to 1\xd71015 cm\u22123 and less than or equal to 5\xd71018 cm\u22123. Methods for making the polymer compositions and articles made of such compositions are also disclosed.