Microstructure of transglutaminase-induced gelatin-natamycin fungistatic composite films

Figures & data

Figure 1. Structural formula for the cyclic annular molecule of natamycin.

Figure 2. FTIR spectra of natamycin gelatin-based fungistatic edible films were treated with different concentrations of TGase.

Figure 3. SEM of natamycin gelatin-based fungistatic edible films was treated with different concentrations of TGase.

Table 1. Physical properties of the natamycin gelatin-based films crosslinked by different concentrations of TGase.

TGase concentration(U/g)	Film thickness (mm)	WVP (g• mm/Pa•s•m^2)	Moisture content (%)	Oxygen gas permeability (g• mm/Pa•s•m^2)
0	0.081 ± 0.003^d	1.59 ± 0.07^a	16.20 ± 0.74^d	4.25 ± 0.09^a
2	0.087 ± 0.003^d	1.57 ± 0.03^a	17.19 ± 0.62^cd	4.24 ± 0.13^a
4	0.114 ± 0.006^c	1.33 ± 0.04^b	17.94 ± 0.41^c	3.67 ± 0.05^b
6	0.153 ± 0.006^b	1.12 ± 0.04^c	19.82 ± 0.86^b	3.16 ± 0.07^c
8	0.218 ± 0.003^a	1.05 ± 0.04^c	21.31 ± 0.56^a	2.27 ± 0.09^d

Values were given as mean ± standard deviation. Values with the same superscript letters within a column are not significantly different (p > 0.05).

Figure 4. Tensile strength (TS) and elongation at break (EBA) of the natamycin gelatin-based films by TGase-induced were in different concentrations. Values were given as mean ± standard deviation. Values with the same superscript letters within a column are not significantly different (p>0.05).

Figure 5. Inhibition diameters of natamycin gelatin-based films were crosslinked by TGase induced at different contents for certain fungus. Values with the same lowercase letters in a line are not significantly different (p>0.05).