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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.
The effect of lavandula essential oils on release of niflumic acid from collagen hydrolysates
Mădălina Georgiana Albu,Laura-Cristina Rusu,Mihaela Violeta Ghica,Durmuș Alpaslan Kaya,Lăcrămioara Popa,Şevket Öztürk,Cristina Dinu-Pîrvu,Ciprian Chelaru,Luminița Albu,Aurelia Meghea,Cornelia Nitipir 한국화학공학회 2016 Korean Journal of Chemical Engineering Vol.33 No.4
The aim of this paper is to design and characterize some drug delivery systems (DDS) based on collagen hydrolysates (H), niflumic acid as a non-steroidal anti-inflammatory model drug and two essential oils of Lavandula officinalis L. (LO) and Lavandula stoechas L. subsp. Stoechas (LS), for use in healing cutaneous wounds with post-lesion inflammatory response. The essential oils are characterized by GC-MS. The wettability capacity of collagen hydrolysate powders was assessed by contact angle measurement. Niflumic acid release was investigated using a modified Franz diffusion cell, and the diffusion coefficient, time-lag and drug flux were determined. The kinetic parameters were found to be influenced by different concentrations and types of essential oils. These therapeutical products, based on collagen hydrolysates and synergistic drug associations, could have potential biomedical application in wound healing treatment.