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Cross-linkage of the branches of poly(ethylenimine) (PEI) suppresses f
lexibility of the polymer as revealed by decreased affinity of the ami
no groups on PEI backbone towards proton or Ni(II) ion. The cross-link
age improves ability of the PEI derivative equipped with beta-cyclodex
trin to deacylate an ester containing t-butylphenyl moiety. (C) 1998 E
lsevier Science Ltd. All rights reserved.