Complex sentence: Polyacrylamide gels were further considered as inherently unstable with respect to polymer resistance to alkaline media progressively hydrolyzing into polyacrylic acid, and thus, using these gels only a semiquantitative characterization of metalloproteins was enabled.
Split into simpler sentences: Polyacrylamide gels were further considered as inherently unstable with respect to polymer resistance to alkaline media progressively hydrolyzing into polyacrylic acid. Thus, using these gels only a semiquantitative characterization of metalloproteins was enabled.