Firmness Properties of Mangoes

Figures & data

Figure 1 Relationship of average firmness index and maturity time (denoted by days after fruit setting) of Nam Dokmai and Chok Anan mangoes. Each point represents an average of 20 fruits.

Figure 2 Relationship between average slope of the force-deformation curve under slow compression and the maturity time of Nam Dokmai and Chok Anan mangoes. Each point represents an average of 20 fruits.

Table 1 Mean and standard derivation of firmness properties of selected mangoes

Cultivar	Day after fruit setting	Firmness index (A/t – (10^9) mm/s^3)	Slope of force-deformation compression curve (S-N/mm)
Chok Anan	67	1.23 ± 0.06	31.55 ± 1.64
	69	1.09 ± 0.11	30.10 ± 2.45
	71	1.12 ± 0.08	34.01 ± 1.94
	73	1.06 ± 0.08	34.46 ± 1.93
	75	1.01 ± 0.05	32.67 ± 1.83
	77	1.16 ± 0.06	33.04 ± 1.61
	79	1.07 ± 0.05	33.56 ± 2.41
	81	1.09 ± 0.06	32.14 ± 1.67
	83	1.02 ± 0.06	33.35 ± 2.03
	85	1.07 ± 0.07	33.18 ± 1.82
	87	1.12 ± 0.06	33.74 ± 1.68
	89	1.03 ± 0.05	33.51 ± 2.03
	91	1.02 ± 0.06	33.22 ± 1.82
	93	1.01 ± 0.09	32.09 ± 4.12
	95	0.97 ± 0.04	31.24 ± 5.51
	97	0.85 ± 0.07	24.59 ± 2.59
	99	0.80 ± 0.07	21.77 ± 2.97
	101	0.75 ± 0.07	24.84 ± 4.10
	103	0.62 ± 0.04	18.33 ± 2.90
	105	0.36 ± 0.05	9.46 ± 2.74
Nam Dokmai	75	0.94 ± 0.06	29.23 ± 2.35
	77	0.95 ± 0.12	29.40 ± 2.59
	79	0.88 ± 0.11	25.47 ± 2.40
	81	0.87 ± 0.10	27.57 ± 3.09
	83	0.87 ± 0.08	29.01 ± 1.36
	85	0.91 ± 0.04	29.02 ± 3.37
	87	0.93 ± 0.12	28.71 ± 2.81
	89	0.83 ± 0.07	23.87 ± 2.53
	91	0.83 ± 0.09	24.84 ± 2.05
	93	0.85 ± 0.05	25.38 ± 2.55
	95	0.92 ± 0.09	29.88 ± 2.51
	97	0.80 ± 0.06	25.08 ± 2.28
	99	0.93 ± 0.08	28.54 ± 2.14
	101	0.85 ± 0.08	27.73 ± 2.37
	103	0.75 ± 0.06	22.89 ± 2.20
	105	0.66 ± 0.04	19.87 ± 1.95
	107	0.62 ± 0.03	19.95 ± 1.73
	109	0.56 ± 0.07	16.96 ± 1.57
	111	0.33 ± 0.03	7.56 ± 1.11
	113	0.21 ± 0.01	3.55 ± 0.52

Figure 3 Linear relationship between impact firmness index A/t and slow compression slope S of a mango.

Figure 4 Impact force with respect to impact time of Chok Anan mango.

Figure 5 Relationship between force and deformation with respect to impact time of Chok Anan mango. tF = time at maximum force(ms) tD = time at maximum deformation (ms).

Figure 6 Relationship between time difference (Δ) and days after fruit setting of Nam Dokmai and Chok Anan.

Figure 7 Specific gravity of Nam Dokmai mango with respect to days after fruit setting. Each point represents 20 fruits.

Table 2 Mean and standard deviation of specific gravity of Nam Dokmai

Day after fruit setting	Specific gravity
75	0.985 ± 0.019
77	0.982 ± 0.014
79	0.987 ± 0.016
81	0.995 ± 0.008
83	0.993 ± 0.007
85	1.003 ± 0.006
87	1.020 ± 0.021
89	1.030 ± 0.033
91	1.031 ± 0.022
93	1.027 ± 0.018
95	1.019 ± 0.008
97	1.028 ± 0.016
99	1.027 ± 0.014
101	1.034 ± 0.006
103	1.030 ± 0.033
105	1.036 ± 0.026
107	1.027 ± 0.019
109	1.045 ± 0.022
111	1.049 ± 0.012
113	1.034 ± 0.007