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Chemical functionalization and stabilization of type I collagen with organic tanning agents
Madalina Georgiana Albu,Viorica Deselnicu,Ioannis Ioannidis,Dana Deselnicu,Ciprian Chelaru 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.2
We investigated the interactions between selected organic tanning agents and type I fibrillar collagen as amodel fibrillar substrate to enable the fast direct evaluation and validation of interpretations of tanning activity. Type Ifibrillar collagen (1%) as gel was used as substrate of tanning and tannic acid, resorcinol- and melamine-formaldehydeand their combination at three concentrations as crosslinking agents (tannins). To evaluate the stability of collagenduring tanning, the crosslinked gels at 2.8, 4.5 and 9.0 pHs were freeze-dried as discs which were characterized by FTIR,shrinkage temperature, enzymatic degradation and optical microscopy, and the results were validated by statisticalanalyses. The best stability was given by combinations between resorcinol- and melamine-formaldehyde at isoelectricpH.