R. Bu"rger and F. Concha Settling velocities of particulate systems: 12 - Batch centrifugation of flocculated suspensions 115-145 Wenqi Gong A real time in situ ATR-FTIR spectroscopic study of linear phosphate adsorption on titania surfaces 147-165 Luo Zhenfu and Chen Qingru Dry beneficiation technology of coal with an air dense-medium fluidized bed 167-175