Using Response Surface Methodology to Optimize Edible Coating Formulations to Delay Ripening and Preserve Postharvest Quality of Tomatoes

Table 3

Regression coefficients, R², R² (adj), and probability values for four dependent variables.

Regression coefficients	RR	Chl a	Firmness	TFC	TA
Constant	220.7^c	8.22^c	4.043^c	255.1^b	0.374^c
CPE	−349.5^c	−15.1^c	0.090^c	−469.3^b	−0.0195^c
CGA	−1.86	1.185^c	−0.0039^c	−11.27^b	−0.0151^a
Time	−4.329^c	−0.041^c	−0.011^c	−1.00	−0.0025
CPECPE	4.76^c	10.20	−0.562^b	348.0^c	−0.0284
CGACGA	1.71	−0.0298^c	−0.0008^c	0.102	0.00029^c
Timetime	4.76^c	−0.0046^b	−0.0004^c	0.091^c	0.00013^c
CPECGA	1.66	−0.872^b	0.0342^b	11.80^c	0.0194^c
CPEtime	5.00^b	0.244	0.0282^c	−4.03^b	−0.00392^c
CGAtime	−2.50	0.0108	0.0001	0.025	−0.00015^c
R^2	0.899	0.881	0.950	0.901	0.976
R^2 adj	0.809	0.775	0.905	0.812	0.955
Model F-value	69.25	28.23	9.41	866.44	3.06
Lack of fit ( value)	<0.001	0.001	0.014	<0.001	0.122

^cSignificant at 0.01 level. ^bSignificant at 0.05 level. ^aSignificant at 0.1 level. RR: ripening rate; Chl a: chlorophyll a; TFC: total flavonoid content; TA: titratable acidity.