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- W2324583513 abstract "Porous collagen matrices containing chlorhexidine digluconate (CHXD) were obtained by freeze-drying of three series of 1.1% collagen hydrogels having the pHs 3.8, 7.4 or 7.4 plus 0.15% glutaric aldehyde (GA) reported to the collagen from hydrogel, each series containing 0, 0.02, 0.05 or 0.10% CHXD reported to the amount of gel. FT-IR spectra show that freeze drying, pH, CHXD or/and GA do not affect the triple helical conformation of collagen molecules forming fibrils. CHXD increases a bit the crosslinking of matrices obtained from acid hydrogels irrespective of its concentration, while of those resulted from slight basic ones is reduced to a slight extent in the absence of GA and much more in its presence, which means that the crosslinking decreases with CHXD concentration increase due to its reaction with the carboxyl groups of collagen and GA respectively. Matrices’ morphology reflects the changes produced in hydrogels by CHXD and/or GA: those obtained from acid hydrogels have lamellar structure, which becomes denser with increasing of CHXD concentration, orientation disappears in the matrices obtained from slight basic hydrogels, CHXD produces the agglomeration of fibrils that increases with CHXD concentration and GA enhances it. In the matrices containing 0.1% CHXD a part of it separates due to the regression of its solubility in basic media. The amounts of CHXD released from the matrices increase with CHXD concentration irrespective of pH and GA presence. The lowest amounts are released by the matrices obtained from the hydrogels with acid medium and the highest ones from the non-crosslinked matrices obtained from hydrogels with slight basic pH containing 0.1% CHXD." @default.
- W2324583513 created "2016-06-24" @default.
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- W2324583513 date "2011-01-01" @default.
- W2324583513 modified "2023-09-23" @default.
- W2324583513 title "CHARACTERIZATION AND IN VITRO RELEASE OF CHLORHEXIDINE DIGLUCONATE CONTAINED IN TYPE I COLLAGEN POROUS MATRICES" @default.
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