Chitosan resins, which clinically served as adsorbents in hemoperfusion therapy, were prepared with reversed-phase suspension methodology using three differently structured crosslinking agents, methanal, glyoxal and g...Chitosan resins, which clinically served as adsorbents in hemoperfusion therapy, were prepared with reversed-phase suspension methodology using three differently structured crosslinking agents, methanal, glyoxal and glutaraldehyde. And the glyoxal and glutaraldehyde crosslinked chitosan resins were reduced with NaBH4 afterwards. By analyzing the results from FTIR and SEM, it was found that the reduction treatment to the adsorbents efficiently improved the chemical stability of these chitosan resins, and the shifts in crosslinking agents exerted influences over the morphologies of the adsorbents obviously. After being put to use in the adsorption tests upon some model uremic middle molecular toxins and BSA in vitro, all three adsorbents demonstrated a fairly realistic adsorption capability to the model toxins but little to BSA. And the adsorption process reached the equilibrium in a clinically qualified short time. But the adsorption capacities of these adsorbents to the model toxins were quite different. It had been found that with the growing of fatty chain length of crosslinking agent, these adsorbents showed a gradually increased adsorption capacity to the model toxins, and the glutaraldehyde crosslinked chitosan resin behaved best.展开更多
Glutaraldehyde crosslinked chitosan used in the adsorption upon model uremic middle molecular toxins was studied. In comparison with untreated glutaraldehyde crosslinked chitosan resin beads, the hydrogen reduced ones...Glutaraldehyde crosslinked chitosan used in the adsorption upon model uremic middle molecular toxins was studied. In comparison with untreated glutaraldehyde crosslinked chitosan resin beads, the hydrogen reduced ones showed a quite realistic behavior in the adsorption upon those model toxins, and the amount of adsorption was fairly high while the equilibrium time was obviously shortened.展开更多
基金the National Natural Science Foundation of China (Grant No.59873011), State Key Fundamental R & D Project (Grant No. G1999064707), Trans-Century Training Program Foundation for the Talents by the Ministry of Education, and the Research Fund for the Doc
文摘Chitosan resins, which clinically served as adsorbents in hemoperfusion therapy, were prepared with reversed-phase suspension methodology using three differently structured crosslinking agents, methanal, glyoxal and glutaraldehyde. And the glyoxal and glutaraldehyde crosslinked chitosan resins were reduced with NaBH4 afterwards. By analyzing the results from FTIR and SEM, it was found that the reduction treatment to the adsorbents efficiently improved the chemical stability of these chitosan resins, and the shifts in crosslinking agents exerted influences over the morphologies of the adsorbents obviously. After being put to use in the adsorption tests upon some model uremic middle molecular toxins and BSA in vitro, all three adsorbents demonstrated a fairly realistic adsorption capability to the model toxins but little to BSA. And the adsorption process reached the equilibrium in a clinically qualified short time. But the adsorption capacities of these adsorbents to the model toxins were quite different. It had been found that with the growing of fatty chain length of crosslinking agent, these adsorbents showed a gradually increased adsorption capacity to the model toxins, and the glutaraldehyde crosslinked chitosan resin behaved best.
文摘Glutaraldehyde crosslinked chitosan used in the adsorption upon model uremic middle molecular toxins was studied. In comparison with untreated glutaraldehyde crosslinked chitosan resin beads, the hydrogen reduced ones showed a quite realistic behavior in the adsorption upon those model toxins, and the amount of adsorption was fairly high while the equilibrium time was obviously shortened.
