کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5412819 | 1393450 | 2011 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Interaction of heparin and dextran sulphate with alkali ions
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی تئوریک و عملی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Interaction of heparin and dextran sulphate with alkali ions Interaction of heparin and dextran sulphate with alkali ions](/preview/png/5412819.png)
چکیده انگلیسی
Influence of the ionic strength on condensation of alkali ions and isotopic exchange of 22Na+ in solutions of heparin and dextran sulphate has been studied at 310Â K. Though structural charge densities of heparin and dextran sulphate are very similar, the Manning's theory predicts correctly the fraction of the condensed of counter-ions only for heparin, but it underestimated this fraction for dextran sulphate. In solutions of both polyelectrolytes the isotopic exchange is not complete and different. In heparin solutions the fraction of the exchangeable ions is independent of the solution composition and does not exceed 80%. In solutions of dextran sulphate the fraction of the exchangeable ions increases with the excess of the supported electrolyte and for the high excess of the supported electrolyte reaches only about 45%. Different interactions of heparin and dextran sulphate with alkali ions result probably from different conformations of both macromolecules.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Molecular Liquids - Volume 159, Issue 1, 15 February 2011, Pages 70-75
Journal: Journal of Molecular Liquids - Volume 159, Issue 1, 15 February 2011, Pages 70-75
نویسندگان
Ilona Kijewska, Justyna Piaseczna, Ewa Hawlicka,