Freezing Treatments for Ectomyelois ceratoniae Mortality and Maintenance of Deglet Noor Palm Date Quality

Table 3

Physicochemical parameters and overall quality of Deglet Noor date fruits on control or frozen treatment.

Parameter	Initial	Control	Frozen
	3a	31.07b	29.87b
h°	65.92a	65.88a	63.32a
Chroma	19.25a	12.81b	12.95b
Firmness (N)	9.76b	11.78a	13.51a
TSS (%)	58.33a	62.33a	57.67a
Alanine	5.43a	4.48a	4.45a
Arginine	4.26a	4.16a	3.81a
Aspartic acid	7.66a	7.10a	8.64a
Glutamic acid	8.54a	8.38a	8.85a
Methionine	10.21a	9.82a	9.92a
Glucose	138.7b	160.3a	162.3a
Fructose	171.3b	196.8ab	208.9a
Sucrose	484.9a	409.6a	414.7a
Total sugars	794.9a	778.9a	773.8a
FRAP	1.09a	1.01a	0.67b
DPPH	0.86a	0.82a	0.48b
TPC	0.96a	0.84a	0.81a
OQ	3.65a	3.60a	3.30a

Means () within the same row with different letters are significantly different () according to the LSD test. TSS: total soluble solids; OQ: overall quality (Table 2). Individual free amino acids are expressed as mg·kg⁻¹, individual sugar contents as g·kg⁻¹, and antioxidant content (FRAP and DPPH) and total phenolic content (TPC) as g·kg⁻¹.