Table 2.

Effect of calcium chloride dip and gamma irradiation treatments on total soluble solids (TSS), total sugars and titratable acidity of Red Delicious apples during storage under refrigerated conditions

Storage period (days)	Treatments
	T1	T2	T3	T4	T5	T6	T7	T8	T9	T10	LSD@0.05
Total soluble solids (0BX)
30	11.6 ± 0.14c,A	11.1 ± 0.11b,A	11.7 ± 0.22d,A	11.4 ± 0.20c,A	11.2 ± 0.14b,A	11.1 ± 0.21b,A	11.2 ± 0.15b,A	11.2 ± 0.30b,A	10.8 ± 0.22a,A	10.8 ± 0.24a,A	0.20
60	12.2 ± 0.13c,B	11.8 ± 0.25b,B	12.4 ± 0.23d,B	12.1 ± 0.22c,B	12.1 ± 0.21c,B	11.6 ± 0.25b,B	11.7 ± 0.23b,B	11.8 ± 0.26b,B	11.4 ± 0.15a,B	11.2 ± 0.11a,B	0.20
90	13.6 ± 0.25g,C	12.8 ± 0.23d,C	13.6 ± 0.33g,C	13.4 ± 0.31f,C	13.1 ± 0.30e,C	12.6 ± 0.30c,C	12.6 ± 0.25c,C	12.5 ± 0.26c,C	12.2 ± 0.18b,C	11.8 ± 0.12a,C	0.15
	22.1*f	17.2*d	22.1*f	21.0*f	19.1*e	15.9*c	15.9*c	15.2*c	13.1*b	10.2*a	1.5
LSD@0.05	0.20	0.17	0.22	0.26	0.23	0.20	0.25	0.28	0.26	0.24
Total sugars (%)
30	9.5 ± 0.15c,A	8.8 ± 0.21b,A	9.6 ± 0.22c,A	8.9 ± 0.23b,A	8.8 ± 0.24b,A	8.8 ± 0.21b,A	8.9 ± 0.25b,A	8.8 ± 0.22b,A	8.1 ± 0.22a,A	8.1 ± 0.20a,A	0.20
60	10.6 ± 0.23d,B	9.8 ± 0.22b,B	10.7 ± 0.23d,B	10.6 ± 0.24d,B	10.4 ± 0.24c,B	9.9 ± 0.25b,B	9.9 ± 0.20b,B	9.9 ± 0.26b,B	9.3 ± 0.21a,B	9.3 ± 0.16a,B	0.10
90	11.7 ± 0.25e,C	10.8 ± 0.23c,C	11.6 ± 0.33e,C	11.5 ± 0.31e,C	11.2 ± 0.30d,C	10.5 ± 0.30b,C	10.5 ± 0.25b,C	10.3 ± 0.26b,C	10.3 ± 0.18b,C	9.9 ± 0.1a,C	0.20
	29.9*f	24.1*d	29.3*f	28.7*f	26.8*e	21.9*c	21.9*c	20.4*b	20.4*b	17.2*a	1.4
LSD@0.05	0.35	0.45	0.36	0.33	0.41	0.45	0.42	0.36	0.35	0.28
Titratable acidity (% malic acid)
30	0.31 ± 0.30a,C	0.32 ± 0.11a,C	0.31 ± 0.25a,C	0.32 ± 0.23a,C	0.33 ± 0.30b,C	0.33 ± 0.25b,C	0.33 ± 0.30b,C	0.34 ± 0.11b,C	0.34 ± 0.14b,C	0.34 ± 0.23b,B	0.01
60	0.24 ± 0.13a,B	0.28 ± 0.25b,B	0.24 ± 0.23a,B	0.28 ± 0.22b,B	0.28 ± 0.21b,B	0.28 ± 0.25b,B	0.28 ± 0.23b,B	0.30 ± 0.26c,B	0.31 ± 0.15c,B	0.31 ± 0.11c,A	0.01
90	0.18 ± 0.25a,A	0.22 ± 0.23b,A	0.19 ± 0.33a,A	0.22 ± 0.31b,A	0.23 ± 0.30b,A	0.23 ± 0.30b,A	0.24 ± 0.25b,A	0.24 ± 0.26b,A	0.26 ± 0.18c,A	0.29 ± 0.12d,A	0.02
	52.6*g	42.1*e	50.0*f	42.1*e	39.5*d	39.5*d	36.8*c	36.8*c	31.6*b	23.7*a	1.4
LSD@0.05	0.01	0.02	0.02	0.03	0.02	0.01	0.02	0.03	0.02	0.02

Values are means ± SD, n = 3; LSD = Least significant difference (p ≤ 0.05);

* = Percentage increase in TSS and total sugars after 90 days of storage/Percentage decrease in acidity after 90 days of storage

Values with different superscript uppercase letters (A–C) within a column and superscript lowercase letters (a–g) within a row differ significantly (p ≤ 0.05)

T₁ = Control; T2 = 0.4 kGy; T3 = 0.5% CaCl₂; T₄ = 1.0% CaCl₂; T₅ = 1.5% CaCl₂; T₆ = 2.0% CaCl₂;

T₇ = 0.5% CaCl₂, 0.4 kGy; T₈ = 1.0% CaCl₂, 0.4 kGy; T₉ = 1.5% CaCl₂, 0.4 kGy; T₁₀ = 2.0% CaCl₂, 0.4 kGy