Table 4 Means squares and significant level for drying time, SEC, ΔE, TPC, TFC, AA, and EO using the response surface method

From: Effects of infrared assisted refractance window drying on physicochemical and quality attributes and thermodynamic analysis of thyme (Thymus vulgaris L.)

Parameters

Time

SEC

ΔE

TPC

TFC

AA

EO

A-Temperature

15504.17**

1.10**

22.12**

3.99×10-6**

30.51**

673.95**

0.05*

B- Weight

6016.47**

1.22**

0.0024ns

1.06×10-6**

8.91*

32.71*

0.020ns

A*B

156.25*

-

0.94ns

8.39×10-8ns

2.74ns

0.12ns

0.001ns

A2

1437.05**

-

0.42ns

8.77×10-6**

92.66**

19.56*

0.15**

B2

0.2660ns

-

18.45**

4.24×10-6**

49.47**

133.85**

0.20**

Residual

17.98

0.003

0.22

5.35×10-8

1.06

2.83

0.009

Lack of fit

28.22ns

0.002ns

0.27ns

1.43×10-6ns

0.32ns

0.28ns

0.002ns

Pure error

10.30

0.006

0.18

8.3010-8

1.62

9.46

0.015

C.V

3.39

1.91

3.23

3.92

3.33

2.67

5.14

R2

0.9946

0.9837

0.9679

0.9857

0.9731

0.9792

0.9041

Adjusted R2

0.9908

0.9805

0.9450

0.9752

0.9538

0.9643

0.8533

Predicated R2

0.9651

0.9758

0.8435

0.9695

0.9330

0.9620

0.9188

Model

Quadratic

Linear

Quadratic

Quadratic

Quadratic

Quadratic

Quadratic

  1. * Significant at P< 0.05, ** significant at P< 0.01, ns not significant at P< 0.05