| 摘要 |
A filtration film capable of collecting with a high efficiency only macromolecular components from a microorganism culture solution containing particle components and macromolecular components. It is characterized in that it has pores whose mean diameter is more than 10 nm and less than 10 mu m or which provide fractionation molecular weight represented by more than 1 x 10<4> and less than 1 x 10<8> and whose permeation resistance is more than 5 x 10 10<1><1>m<-><1> and less than 1 x 10<1><5>m<-><1>. <IMAGE> |
