A fuel cell separator of the present invention is provided with a reactant gas flow region including a plurality of straight portions and one or more turn portions. The method includes receiving at least first and second data tables. One of the inputs may include a first value representing number of documents to be assigned a single index. A method of using the culture device is also provided. These chlorofluorinated acrylates may be photocured in the presence of a photoinitiator into transparent polymers useful as optical waveguiding materials. The dough comprises a fat selected from a group consisting of one or more of a single fractionated fat, a double fractionated fat, cocoa butter or mixtures of a single fractionated fat, a double fractionated fat and cocoa butter.