A method is provided for incorporating a foaming agent into mixtures of particulates and then forming a foam within the mixture to increase the flowability of the particulates. The method may comprise the steps of receiving an identifier of a specific channel group, from among a plurality of channel groups, from an MBAN coordinator in the allocated frequency band; and searching for a channel in a channel group relating to the received identifier of the channel group in a different frequency band. The virtual key allows the electric vehicle to be operated in a limited operating mode that defines constraints on operating the vehicle. When the disk controller is to access the storage device of the external disk controller or the internal disk device in logical sub-block units in which an additional code containing a guarantee code is added to user data, it makes such access in minimum common multiple units of logical sub-blocks and physical sub-blocks, and changes the guarantee code length. Another of these host cell proteins, referred to herein as NS1I-1, interacts with influenza virus protein NS1.