Vanillin cross-linked chitosan microspheres for controlled release of resveratrol

Microstructure and magneto-dielectric properties of the chitosan/gelatin-YIG biocomposites

“…One can observe in F sample an amorphous phase characteristic to the matrix polymer and this pattern follows those observed in the literature [18][19][20][21][22]. This behavior is present in all composites, see FY 25 and FY 50 ( Figure 3). The broad peak in composites at 2" = 32.2° happened due to the association of the chitosan-gelatin with YIG particles.…”

“…It is possible to observe that the polymeric matrix in 250 mg series is larger, and the grains are deeply encapsulated on it, while in 500 mg series the amount of YIG particles is outside the membrane. When the blend received the glutaraldehyde treatment, the YIG particles were encapsulated by polymeric matrix, and YIG was found only in cer- Figure 3 shows the XRD patterns of the samples F (only chitosan and gelatin), FY 25 , FY 50 and YIG. The crystalline phase obtained from the YIG powder was identified by comparing the diffractograms from the ICDD database (ICDD/PDF-70-0953), see Figure 3.…”

“…These bands are assigned to Fe-O bonds. The bands obtained in the analysis were conferred with the literature data [23][24][25][26][27] and are shown in Table 2. The thermogravimetric analysis was performed to obtain the degradation profile of samples as well as to identify the mass of residual YIG and help to explain the dielectric and magnetic results.…”

Development of drug-loaded chitosan–vanillin nanoparticles and its cytotoxicity against HT-29 cells

“…Chitosan nanoparticles were prepared by an emulsion-solvent evaporation method with minor modification (Peng et al, 2010;Hongyan et al, 2011). Chitosan was dissolved in 10 mL aqueous acetic acid solution (1%) with a concentration of 2% (w/v) to form a water phase.…”

“…It was demonstrated in the previous work of our group that the preparation of nanoparticles was affected by many factors including emulsifier, stirring speed and the ratio of water to oil phase. When span 80 and tween 80 (1:1, v/v) was used as emulsifier particles with microsize were obtained (Peng et al, 2010). When sorbitan sesquioleate was used as emulsifier, particle with nanosize was obtained (Wang et al, 2011).…”