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- W1858307174 abstract "In this research, hydrogels based on poly vinyl alcohol and poly acrylic acid blend were prepared which were cross-linked by applied thermal conditions. Afterward, effects of time and heating on water uptake were investigated. The highest water uptake value exhibited by the sample that was heated for 20 min. at 110 oC was about 2129% after 4 days at equilibrium state. Hydrogels exhibited pH-sensitive behaviors in a way that decreasing pH values down to 4.8 did not have any effect on the hydrogels size, whereas with increasing pH upto 8, the hydrogels were expanded. These synthetic hydrogels were evaluated as a controlled drug delivery systems and theophylline released concentration was measured by UV-spectrophotometeric method at different pH values. In vitro biocompatibility experiments were undertaken using L-929 mouse fibroblast cell lines where the results showed appropriate cell attachment and cell spreading with spindle like morphologies." @default.
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- W1858307174 date "2008-10-01" @default.
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- W1858307174 title "Synthesis of pH Sensitive Hydrogels Based on Poly Vinyl Alcohol and Poly Acrylic Acid" @default.
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