The microencapsulated Penicillium purpurogenum Li-3 cells were prepared with the entrapment technique of liquidcore microcapsules from sodium alginate( SA) and sodium carboxymethyl cellulose( CMC) in this paper. The preparation conditions and catalytic performances of the microencapsulated cells were studied,and the effects of different factors on the diameter,mechanical strength,breakage rate and catalytic performance of microencapsulated cells were investigated.The optimal conditions of concentration of s...