کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1988367 1540394 2008 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Chitosan gel beads immobilized Cu (II) for selective adsorption of amino acids
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی زیست شیمی
پیش نمایش صفحه اول مقاله
Chitosan gel beads immobilized Cu (II) for selective adsorption of amino acids
چکیده انگلیسی

Chitosan (CS) gel beads were prepared by using phase inversion and precipitation technique. The gel beads could bind copper (II), by which Cu (II) ion-immobilized chitosan gel beads (CS-Cu2+ gel beads) were prepared, and the amount of the immobilized Cu (II) was about 35 mg/g when the CS gel beads were incubated in 150 ppm cupric sulfate solution. The CS-Cu2+ gel beads could selectively adsorb histidine (His) from the mixed solution containing His and tryptophan (Trp); and the selective coefficient which was defined as the adsorbed amount ratio of His to Trp was about 8.0 at the pH value of 7.4. The effect of the pH value on the amino acid adsorption was also studied. In order to investigate the relationship of the amino acid adsorption and protein adsorption, the adsorbed amounts for IgG and albumin were determined; and the results indicated that the CS-Cu2+ gel beads could adsorb a larger amount of IgG than albumin due to the larger amount of the exposed residual His. The study provided a sorbent and a method to selectively remove His and IgG.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Biochemical and Biophysical Methods - Volume 70, Issue 6, 24 April 2008, Pages 903–908
نویسندگان
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