کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1390864 983152 2007 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Solution properties of high-molar-mass hyaluronans: the biopolymer degradation by ascorbate
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
پیش نمایش صفحه اول مقاله
Solution properties of high-molar-mass hyaluronans: the biopolymer degradation by ascorbate
چکیده انگلیسی

An accurate molecular characterization, molar mass and size distributions, of 10 hyaluronan (HA) samples was performed by using a multi-angle light scattering detector connected on-line to a size exclusion chromatographic system. The dynamic viscosity η of the HA solutions was investigated using a rotational viscometer. On monitoring the sample dynamic viscosity for up to 5 h, a small however constant increase of the η value was observed, indicating rheopectic behavior of all 10 HA solutions. Addition of ascorbic acid to the HA solutions caused significant changes in the rheological properties of the samples investigated. The change of η values in the course of time was explained by the redox reactions (caused by the added ascorbate) that occur during the dynamic viscosity monitoring.

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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Research - Volume 342, Issue 8, 11 June 2007, Pages 1071–1077
نویسندگان
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