An internal combustion engine includes an exhaust gas recirculation system. The brush includes an adjusting function, in which without bringing about an increase in manufacturing cost, the adjusting function for arbitrarily adjusting a retreating position of a needle is provided and blowing-off of a certain amount of coating material can be easily performed. As an example, a selected amount of isotactic polypropylene is blended with a selected amount of atactic polypropylene to prepare an adhesive composition having one or more performance properties that are superior to the performance properties of a conventional hot-melt adhesive. This anode design can be applied to substantially increase the brightness of stationary, rotating anode or other electron bombardment-based sources where brightness is defined as number of x-rays per unit area and unit solid angle emitted by a source and is a key figure of merit parameter for a source. Said formulations have advantages such as higher stability of the system and bioavailability of the active ingredient. The adsorbent that is regenerated by using this process retains at least 70% of its capacity for adsorption of sulfur as compared to fresh adsorbent.