Page 175 - Demo

SECTION I: MOLECULAR GENETIC ENGINEERING AND BIOCHEMICAL TECHNOLOGY 179around 3361 cm%u22121 corresponding to N-H and O-H stretching vibrations, the peak at 2869 cm%u22121 assigned to C-H stretching vibrations, the strong doublet absorption peak at 1023 and 1066 cm%u22121 attributed to pyranose structure. The FT-IR spectrum of PLA displayed characteristic stretching frequencies for C=O and C-O at 1747 and 1180, 1080 cm%u22121, respectively. The FT-IR spectrum of the nanofibers revealed three major peaks at 1750 (C=O) and 1181, 1082 cm%u22121 (C-O). Figure 3. FTIR spectra of CS (A) PEG (B) PLA (C), capsaicin (D), the nanofibers CS/PLA/PEG loaded with 12% capsaicin (E)The stress%u2013strain curve of the electrospun nanofibers loaded with capsaicin was shown in Figure 4. Mechanical analysis of the nanofibers exhibited a tensile strength of 2.11 %u00b1 0.64 MPa, an elongation at break of 13.22 %u00b1 1.65%, and a Young%u2019s modulus of 95.49 %u00b1 4.94 MPa.