A reviewof attrition of fluid cracking catalystparticles R. Boerefijn, N.J.Gudde and M. Ghadiri 145
Original papers
Preparation and characterization ofuniformly coated particles by homogeneous precipitation (cobaltcompounds on nickelcompounds) I. ul Haq and Khalida Akhtar 175
A novel cryogenic grinding system for recyclingscrap tire peels S.B. Liang and Y.C.Hao 187
Surface active sites introduced onto calcium carbonate powder by a newsurface preparation process M. Fuji, N.Maruzuka, J. Yoshimori,T. Takei, T. Watanabe,M. Chikazawa,K. Tanabe and K. Mitsuhashi 199
Preparation andcharacterization of nanocrystalline dopedTiO2 S.V. Zaitsev, Jooho Moon, H. Takagi andM. Awano 211
Translated papers
Simultaneous phenomenonof particle deposition and reentrainment in charged aerosol flow ---effects of particle charge and external electric field on the depositionlayer I. Adhiwidjaja, Shuji Matsusaka, S. Yabe andH. Masuda 221
Amorphization of kaolinite and media motion ingrinding by a double rotating cylinders mill --- a comparison with atumbling ball mill M. Miyazaki, Masataka Kamitani, T. Nagai,J. Kano and F. Saito 235
Book review 245
The East Asian Professors' Meeting of ParticleTechnology (Reports on the 4th and 5thmeetings) 247
Abstracts of original research papers published inthe Journal of the Society of Powder Technology,Japan 259
Bulletin of the Association of Powder ProcessIndustry and Engineering, Japan(APPIE) 265
