A plurality of sipes extending in a tire width direction are provided in a tread surface of a block. The receiving unit is configured to receive a request for a web page from a terminal. The nitrogen concentration of the chamber is thus adjusted rapidly to switch to the DPN process of the next dose. A portion of the treated gas stream may regenerate the adsorbent in the first adsorption zone by removing organic sulfur compounds. The degradable prepolymer is useful as a binder for explosive and propellant compositions.