PHOTOCATALYTIC DEGRADATION OF HEPARIN OVER TITANIUM-DIOXIDE

被引：5
|
作者：
BLAZKOVA, A
BREZOVA, V
SOLDANOVA, Z
STASKO, A
SOLDAN, M
CEPPAN, M
机构：
[1] Faculty of Chemical Technology, Slovak Technical University, Bratislava, SK-812 37
来源：
JOURNAL OF MATERIALS SCIENCE | 1995年 / 30卷 / 03期
关键词：
D O I：
10.1007/BF00356334
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The photochemical degradation of the homogeneous oxygen-saturated buffered aqueous solutions of sodium heparin salt initiated by the irradiation with medium pressure mercury lamp was compared with the heterogeneous photocatalytic heparin degradation sensitized by titanium dioxide. The obtained results confirmed that UV irradiation of heparin homogeneous aqueous solutions caused negligible changes in the polysaccharidic structure only. The irradiation of heparin in oxygen-saturated physiological saline photosensitized by the TiO2 caused significant changes in the heparin macromolecule. The study of photocatalytic heparin degradation in buffered oxygen-saturated TiO2 suspensions (pH=5-9) ascertained a significant influence of pH on the degradation of heparin. The polymeric chain is predominantly cleaved in the acidic and neutral medium.
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页码：729 / 733
页数：5
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