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BIOLOGICAL ACTIVITY OF THE OXIDIZED POLYSACCHARIDES<br>Bioreactive polysaccharides have been most commonly used as drugs or<br>drug delivery systems. The present paper describes the biological<br>activity of some artificial and natural polyanionic polysaccharides.<br>Results regarding oxidized cellulose and carboxymethylcellulose<br>modified with benzocaine or N u2013 hydroxy u2013 3,4 u2013 dihydroxybenzamide<br>(Didox) complete the picture of antiviral and antitumoral effects of<br>polysaccharides. The biological tests regarding antiviral and antitumor<br>activity showed that the introduction of benzocaine as a spacer unit<br>bet
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