Optimization of Agave tequilana Weber var. Azul Juice Spray Drying Process

Table 3

Analysis of variance of the regression coefficients of the fitted quadratic equation for the quality parameters studied.

	Response
Coefficients	Aw (Y1)	Bulk density (Y2)	Hygroscopicity (Y3)	Reduced sugar (Y4)	Solubility (Y5)	Yield (Y6)
		Kg L^−1	Kgwater s^−1	Kg L^−1	s	%
𝛽0 (intercept)	0.397***	0.5257***	0.7567***	7.4*	7.59***	5.1633***
Linear
𝛽1	0.018 ns	−0.016 ns	−0.0021 ns	−0.8 ns	0.5113*	0.1788 ns
𝛽2	−0.0215 ns	−0.0204 ns	−0.0016 ns	2.4625 ns	0.0325 ns	2.6112***
𝛽3	0.0135 ns	0.0241 ns	0.0148 ns	1.3875 ns	−1.1638**	1.685**
Cross-product
𝛽12	−0.0043 ns	0.0117 ns	−0.0025 ns	0.7 ns	−0.755*	−1.0275**
𝛽13	0.0398 ns	−0.0278 ns	−0.0058 ns	−3.2 ns	−2.1275***	−1.73***
𝛽23	−0.0047 ns	−0.0055 ns	0.0133 ns	−3.375 ns	−1.13**	−1.87***
Quadratic
𝛽11	−0.0226 ns	0.0167 ns	−0.0226 ns	−1.3875 ns	1.8113**	1.9221*
𝛽22	−0.0221 ns	0.0179 ns	−0.0206 ns	3.7375 ns	1.7037**	4.4571**
𝛽33	−0.0011 ns	0.0339 ns	−0.0068 ns	0.8375 ns	−0.6087 ns	3.2596**
𝑅^2	0.59	0.82	0.63	0.66	0.98	0.99
CV	0.049	0.029	0.026	4.727	0.51	0.76
Lack-of-fit	0.266	0.504	0.577	0.118	0.951	0.029
𝑃	<0.638	<0.160	<0.558	<0.484	<0.001	<0.0001

∗Significant at 𝑃≤0.05, **significant at 𝑃≤0.01, and ***significant at 𝑃≤0.001.
ns: not significant.