“…DEAE-Sephadex A-25 was used for the separation of steroids (581) and nucleic acid derivatives ( 1146), Sephadex G-10 (CM) for aflatoxins (875), Sephadex G-25 eluted with phenol-acetic acid-water (1:1:1) for acidic plant constituents (787), hydroxyalkoxypropyl Sephadex for fatsoluble vitamins (547), mercurated dextran for mononucleotides (499), and a double column of anion-exchange resin and Sephadex LH-20 for measurement of serum triiodothyronine (844)• Porasil and Styragel packings gives approximately equivalent results (1046), and Merkogel SI has good properties (1041) for high speed gel permeation chromatography. Other suitable packings include porous glasses (260, 1625), polystyrene gels prepared by anionic polymerization (1571), porous alumina (49, 50, 1209), and carbon molecular sieves (662). The synthesis of styrenedivinylbenzene (871,995), ethyl(vinyl)benzene-divinylbenzene, and vinyl acetate-divinyl adipate (559, 560) polymeric porous gels has been described.…”