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- W2054100802 abstract "Poly(hydroxypropyl methacrylate) [poly(HPMA)] gel beads with an average size of 150–200 μm were prepared by suspension polymerization of hydroxypropyl methacrylate (HPMA). The poly(HPMA) gel beads were characterized by swelling studies, surface area measurements, scanning electron microscopy (SEM) and elemental analysis. Poly(HPMA) gel beads had a specific surface area of 88.6 m2/g. The dye Reactive Green HE 4BD was chemically attached to yield dye-poly(HPMA) gel beads at an average concentration of 44.3 μmol dye/g bead with a swelling ratio of 75%. These dye attached gel beads were used in the separation of immunoglobulin-G (IgG) through adsorption–elution studies. The non-specific adsorption of IgG on the poly(HPMA) gel beads was 0.5 mg/g. The attachment of Reactive Green HE 4BD significantly increased the adsorption of IgG up to 71 mg/g. The Langmuir adsorption model was found to be applicable in interpretation of data pertaining to the adsorption studies of IgG with Reactive Green HE 4BD attached to the poly(HPMA) gel beads. The adsorption of IgG was found to be optimal at pH 7.0. The adsorption of IgG was observed to decrease by about 76% as the NaCl concentration was increased from 0.001 to 0.1 M. The IgG adsorption capacity of the dye attached poly(HPMA) gel beads was determined for a commercially available IgG solution to be 4.2 mg/g for IgG1, 64.5 mg/g for IgG2, 7.1 mg/g for IgG3 and 10.8 mg/g for IgG4. The Reactive Green HE 4BD attached poly(HPMA) gel beads have a significant adsorption capacity for IgG2. The quantity of adsorbed IgG2 is three times higher than the quantity of the other subclasses, IgG1, IgG3 and IgG4. A similar adsorption behaviour was observed when the albumin free human plasma was used. The quantity of adsorbed IgG2 is higher than the quantity of the other subclasses, IgG1, IgG3 and IgG4. Adsorption capacities for albumin free human plasma were obtained as 6.4 mg/g for IgG1, 67.8 mg/g for IgG2, 5.2 mg/g for IgG3 and 8.6 mg/g for IgG4. Significant amount of the adsorbed IgG (up to 95%) was eluted in 1 h in the elution medium containing 2.0 M NaCl. Repeated adsorption/elution processes showed that these dye attached gel beads are suitable for IgG adsorption." @default.
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- W2054100802 date "2006-11-01" @default.
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- W2054100802 title "Affinity separation of immunoglobulin G subclasses on dye attached poly(hydroxypropyl methacrylate) beads" @default.
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- W2054100802 doi "https://doi.org/10.1016/j.ijbiomac.2006.04.009" @default.
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