| 摘要 |
PCT No. PCT/EP91/02168 Sec. 371 Date Jul. 27, 1992 Sec. 102(e) Date Jul. 27, 1992 PCT Filed Nov. 18, 1991 PCT Pub. No. WO92/09635 PCT Pub. Date Jun. 11, 1992.Modified chitins and chitosans with recurring units of the formula <IMAGE> wherein R denotes -NH2, -NHCOCH3 and R', with R' being present in at least 30% of the recurring units, characterized in that R' represents a group of the formula their favourable biological properties, these materials are advantageously useful in medical and cosmetical applications. |
