A fuel cell stack includes power generation cells, terminal plates, first cooling cells, and second cooling cells. The process can include reacting an effective amount of one or more aromatic compounds and an effective amount of one or more aromatic methylating agents to form a product having a mole ratio of methyl to phenyl of at least about 0. The axle is disposed at a second position so that a rotating path of the rotatable reflective mirror passes through the incident light reflected on the fixed reflective mirror. Further, a gasket is operationally coupled to the replaceable unit housing and the replaceable unit faceplate for reducing electromagnetic radiation emissions from the replaceable unit and chassis interface. According to the present invention, a PTX3 gene expression suppressing method useful for the treatment of autoimmune diseases, especially rheumatoid arthritis can be provided. Methods of using the wrapping material to wrap a floral arrangement, a flower pot, and to form a flower pot.