A Schmidt-Steffen

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Asymmetric ultrafiltration membranes suitable for covalent bonding of urease can be prepared from membranes based upon polyamide or polysulfone. Because the original membrane polymers are not chemically reactive, they have to be converted in such a way that known reactions for enzyme fixation can be used such as the diazo, the acyl-acid, the carbodiimide,(More)
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