A tissue graft composition comprising liver basement membrane is described. The dielectric composition contains an amorphous substance containing the A-group and the B-group and a crystalline substance containing the A-group and the B-group. In one aspect of the invention, a wireless radio transmitter is contained in a housing formed as a float assembly and has an aperture through which a tow rope passes to permit the housing to be carried by a tow rope. In such a refrigerating device, an insulation capability of the motor does not decrease with the elapse of long time. This mechanism then identifies a best content server to respond to a request directed to the customer’s domain.