Structural and Physicochemical Characteristics of Granular Malic Acid-Treated Sweet Potato Starch Containing Heat-Stable Resistant Starch

Table 1

Degree of substitution and in vitro digestibility of raw and malic acid-treated sweet potato starches.

Sample	DS	Noncooked starch			Cooked starch
		RDS (%)	SDS (%)	RS (%)	RDS (%)	SDS (%)	RS (%)
Raw	n/d	14.5 ± 1.20^a	52.9 ± 4.20^d	32.6 ± 3.07^bc	59.6 ± 5.90^c	19.8 ± 2.45^d	20.6 ± 3.52^a
2.0M-25	n/d	15.5 ± 0.25^a	55.2 ± 2.41^d	29.3 ± 2.24^ab	67.9 ± 3.38^de	13.7 ± 4.04^c	18.4 ± 0.80^a
DW-130	n/d	21.1 ± 0.73^b	51.8 ± 1.76^d	27.0 ± 1.79^a	71.8 ± 3.71^e	8.67 ± 3.65^b	19.5 ± 1.16^a
0.5M-130	0.088 ± 0.0068^a	36.4 ± 1.53^c	28.7 ± 1.19^c	34.9 ± 1.51^c	69.9 ± 1.79^e	3.57 ± 2.65^ab	26.6 ± 4.27^b
1.0M-130	0.127 ± 0.0094^b	48.5 ± 2.73^e	12.8 ± 0.87^b	38.7 ± 1.86^d	64.0 ± 0.31^cd	1.83 ± 0.69^a	34.2 ± 0.96^c
1.5M-130	0.184 ± 0.0058^c	46.9 ± 1.16^e	6.63 ± 1.86^a	46.5 ± 2.83^e	52.8 ± 1.55^b	3.87 ± 2.61^ab	43.3 ± 1.93^d
2.0M-130	0.214 ± 0.0029^d	41.9 ± 0.74^d	4.72 ± 0.70^a	53.4 ± 0.69^f	45.2 ± 0.84^a	4.86 ± 2.39^ab	49.9 ± 2.57^e

DS, degree of substitution; RDS, rapidly digestible starch; SDS, slowly digestible starch; RS, resistant starch; n/d, not detected. The values with different superscripts in each column are significantly different () by Duncan’s multiple range test.