Physicochemical properties of Arenga pinnata (Wurmb.) Merr starch: effect of high-speed jet treatment

Figures & data

Figure 1. SEM pictures of APS treated by HSJ at 200 MPa for different numbers of passes. (a) HSJ0, (b) HSJ2, (c) HSJ4, and (d) HSJ8

Figure 2. The XRD diffraction patterns of APS samples treated by HSJ treatment

Table 1. Crystallinity, molecular order, and gelatinization enthalpy of APS samples treated by HSJ treatment

Starch samples	XRD crystallinity	FTIR 1,047/1,022 ratio	Gelatinization enthalpy(J/g)
HSJ0	24.7%	0.673 ± 0.008a	21.06 ± 0.95a
HSJ2	13.8%	0.506 ± 0.005b	19.23 ± 1.23b
HSJ4	1.24%	0.348 ± 0.003c	11.9 ± 0.85c
HSJ8	0.55%	0.227 ± 0.004d	2.08 ± 0.63d

The significance for “a, b, c and d„ is P<0.05.

Figure 3. Turbidity of native and HSJ-treated APS pastes during storage at 4℃

Figure 4. Dynamic oscillatory curves of APS treated by HSJ for different cycles. (a, c) Controlled heating; (b, d) controlled cooling; and (e, f) frequency sweeping