Preparation, characterization and performance evaluation of separation of alcohol using crosslinked membrane materials

Magnetic-propelled Fe3O4–chitosan carriers enhancel-asparaginase catalytic activity: a promising strategy for enzyme immobilization

“…Similar absorption peaks were observed in some reports of chitosan cross-linked with GDA. 39,40 The FTIR spectrum of Fe 3 O 4 –chitosan– l -ASNase is presented in Fig. 3e .…”

Synthesis and Characterization of Electrospun Composite Scaffolds Based on Chitosan-Carboxylated Graphene Oxide with Potential Biomedical Applications

“…It is important to mention the presence of a new strong peak at around 1718 cm −1 in the FTIR patterns recorded for unwashed samples ( Figure 2 b) and its absence in the spectra recorded for washed nanofibrous scaffolds ( Figure 2 c). This peak was attributed to the stretching vibration of the C=O group of free-aldehydic bonds from the GA structure [ 49 ] and its disappearance demonstrated the efficient elimination of unreacted residual GA from the scaffold’s composition. Further, the crosslinking process takes place between the amino groups of CS and aldehyde groups of GA by a Schiff base reaction [ 50 ], leading to a new imine (C=N) bond which appeared in FTIR spectra at around 1648 cm −1 .…”

Ammonium release in synthetic and human urine by a urease immobilized nanoconstruct

“…The crosslinking of glutaraldehyde with chitosan coated MIONPs is established by the band at 1635 cm −1 attributable to imine bond (N]C) stretching. 40 The crosslinking is further conrmed by band at 1724 cm −1 ascribed to the C]O stretching of glutaraldehyde. 41 The spectrum of urease immobilized on GA/CS/MIONPs (Fig.…”