ULTRAFILTRATION IN A PLANE CHANNEL WITH ONE PERMEABLE SURFACE V. I. Baikov and P. K. Znovets UDC 532.542 A study is carried out to investigate unsteady-state concentration polarization in the case of laminar ultrafiltration in a plane channel with one permeable surface as a function of the selectivity properties of the membrane. JEPTER74920199913 JEPTER7492013