TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Oligomer: The polyalkylene glycol main frame comprises m repeating units of ethylene-oxy (EO) groups (EO)m and alkylene-oxy (RO) repeating units (RO)n.m = 20-100;n = 10-50. Preferably, the oligomer has the structure (AA-O)k-B-O(EO)p(PO)q-UA-(O(EO)m(RO)n-UA)e-O(PO)q(EO)p-B-(0-AA)k.AA = (meth)acryloyl group;k = 1 or 2;B = 2-6C alkane polyol residue excluding the hydroxyl group;EO = -CH2-CH2-O-;p = 1-15;PO = -CH2-CH(CH3)-O-;q = 0-14;UA = -OCHN-I-NHCO-;I = organic diisocyanate residue excluding isocyanate group;m = 20-100;e = 1-2;n = 10-50;R = 3-4C alkylene. Proviso, when B = -CH2-CH2-, I = isophorone residue. Preferred Process: The oligomer is polymerized in the presence of microorganisms to form the polymerized hydration gel microorganism support with fixed organisms. EXAMPLE - A microorganism fixed support for fixing bisphenol A decomposing bacteria (Sphingomanas sp at concentration of 5x106 cells/ml) was formed. A model oligomer having the structure AA-O(EO)p-UA-O(EO)m(RO)n-UA-(EO)p-O-AA was used.    p = 8;    m = 54;    n = 11;    AA = methcryloyl;    EO = ethyleneoxy;    PO = propylene-oxy;    UA = -OCHN-I-NCHO-;    I = isophorone group of diisocyanate    . The oligomer was produced by reacting for 3 hours at 80-90degreesC, 3100 g (1 mol) of a polyether polyol (Adeka Pluronic 25R-2) with 444 g (2 mols) of isophorone diisocyanate and 1.3 g of dibutyl tin di-laurate catalyst. After cooling to 70degreesC, hydroquinone monomethylether (0.44 g), polyalkylene glycol monomethacrylate (868 g) were also added for 30 minutes and stirred. Reaction temperature was maintained at 80-90degreesC and reaction was continued for 4 hours. The contents were sampled and reaction completion was judged when no isocyanate group was detected. A composite liquid of pale yellow color was obtained. A 10% aqueous solution of the oligomer obtained, was formed. The oligomer was polymerized in the presence of bisphenol A decomposing bacteria to from a polymerized support containing the microorganism fixed in it. The number of bacteria adhered on the support after cultivating for 1 month was 8x1010 cells/ml and the compressive strength of the support was favorable (4).