Ngoc Oanh, H. and Ngoc Hung, T. 2008. PURIFICATION OF PECTINASE FROM ASP.NIGER BY THE TECHNIQUES OF GEL FILTRATION AND CROSS-FLOW MEMBRANE. Science and Technology Development Journal. 11, 8 (Aug. 2008), 46-50. DOI:https://doi.org/https://doi.org/10.32508/stdj.v11i8.2673.