Disclosed is a PET tire cord which has a flat spot index defined by the following Calculation Formula 1 of 5. The radio node controller maintains an open traffic channel with an access terminal when the access terminal moves from a coverage area of the first subnet to a coverage area of the second subnet and when the access terminal uses a carrier in the first subnet that cannot be used in the second subnet. The present invention also pertains to the resulting compounds, compositions comprising them, and their use in methods of inactivating pathogens, and methods of medical treatment and diagnosis, etc.