Table 12 The results of constant, linear regression coefficients of variables for the microwave-assisted extraction of astaxanthin with different solvents from P. maeoticus Gammarus
From: Green astaxanthin extraction using microwave and ultrasound pretreatments
Factor | Organic solvent | Vegetable oil | Ionic microemulsion | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Coefficient estimate | df | Standard error | 95% CI low | 95% CI high | Coefficient estimate | df | Standard error | 95% CI low | 95% CI high | Coefficient estimate | df | Standard error | 95% CI low | 95% CI high | |
Total carotenoid content | |||||||||||||||
Intercept | 16.98 | 1 | 0.6468 | 15.61 | 18.35 | 6.52 | 1 | 0.4871 | 5.48 | 7.55 | 55.05 | 1 | 3.43 | 47.78 | 62.33 |
A.Ratio | −3.76 | 1 | 0.9147 | −5.69 | −1.82 | −0.4677 | 1 | 0.6889 | −1.93 | 0.9926 | −7.42 | 1 | 4.85 | −17.71 | 2.87 |
B.Power | −0.3030 | 1 | 0.9147 | −2.24 | 1.64 | 0.1784 | 1 | 0.6889 | −1.28 | 1.64 | 5.79 | 1 | 4.85 | −4.50 | 16.08 |
C.Time | 1.20 | 1 | 0.9147 | −0.7393 | 3.14 | −0.3122 | 1 | 0.6889 | −1.77 | 1.15 | 4.44 | 1 | 4.85 | −5.84 | 14.73 |
R² | 0.0184 | 0.0438 | 0.2233 | ||||||||||||
Adjusted R² | −0.1657 | −0.1355 | 0.0777 | ||||||||||||
Predicted R² | −0.5588 | −0.5279 | −0.3947 | ||||||||||||
Astaxanthin concentration | |||||||||||||||
Intercept | 12.33 | 1 | 0.4588 | 11.36 | 13.31 | 5.68 | 1 | 0.4193 | 4.81 | 6.56 | 48.87 | 1 | 2.36 | 43.87 | 53.87 |
A.Ratio | −3.24 | 1 | 0.6489 | −4.62 | −1.87 | – | – | – | – | – | −7.45 | 1 | 3.34 | −14.52 | −0.3832 |
B.Power | −0.1270 | 1 | 0.6489 | −1.50 | 1.25 | – | – | – | – | – | 1.60 | 1 | 3.34 | −5.47 | 8.67 |
C.Time | 0.2101 | 1 | 0.6489 | −1.17 | 1.59 | – | – | – | – | – | 3.75 | 1 | 3.34 | −3.32 | 10.82 |
R² | 0.6109 | – | 0.2886 | ||||||||||||
Adjusted R² | 0.5379 | – | 0.1552 | ||||||||||||
Predicted R² | 0.2997 | – | −0.1183 | ||||||||||||
Astaxanthin recovery yield | |||||||||||||||
Intercept | 71.96 | 1 | 1.10 | 69.64 | 74.29 | 85.53 | 1 | 1.58 | 82.22 | 88.84 | 90.36 | 1 | 2.45 | 85.17 | 95.55 |
A.Ratio | −3.40 | 1 | 1.55 | −6.69 | −0.1092 | – | – | – | – | – | −1.26 | 1 | 3.46 | −8.60 | 6.07 |
B.Power | 1.14 | 1 | 1.55 | −2.15 | 4.42 | – | – | – | – | – | −4.83 | 1 | 3.46 | −12.17 | 2.51 |
C.Time | −3.37 | 1 | 1.55 | −6.66 | −0.0772 | – | – | – | – | – | −1.80 | 1 | 3.46 | −9.14 | 5.54 |
R² | 0.3856 | – | 0.1282 | ||||||||||||
Adjusted R² | 0.2703 | – | −0.0353 | ||||||||||||
Predicted R² | 0.0161 | – | −0.7122 | ||||||||||||
