Title Page
Contents
Abstract 11
Introduction 13
Objectives 14
References 15
Chapter 1. Quality evaluation of weight loss and moisture content during Gwamegi processing using response surface methodology 18
Abstract 18
Introduction 19
Materials and Methods 20
Samples Preparation 20
Experimental Design 20
Statistical Analysis 22
Results and Discussion 23
Weight loss 23
Moisture content 28
Conclusion 32
References 33
Chapter 2. Chemical evaluation of fishy smell during Gwamegi processing using response surface methodology with TVBN and TMA 35
Abstract 35
Introduction 36
Materials and Methods 37
Determination of TVBN 37
Determination of TMA 39
Statistical Analysis 39
Results and Discussion 40
TVBN 40
TMA 45
Conclusion 49
References 50
Chapter 3. Sensory evaluation of Gwamegi using response surface methodology. 52
Abstract 52
Introduction 53
Materials and Methods 54
Determination of sensory quality 54
Statistical Analysis 55
Results and Discussion 56
Fishy smell 62
Gwamegi smell 64
Preference 66
Appearance 69
Conclusion 71
References 72
Table 1. Independent variable, controlled variable and dependent variable for the... 21
Table 2. Coded variables and their real values in 3x3x15 factorial design 21
Table 3. Moisture content of Gwamegi processed under different conditions 24
Table 4. Statistical analysis of weight loss in Gwamegi processing 25
Table 5. Coefficient regression model estimated by the RSREG procedure for weight loss 25
Table 6. Moisture content of Gwamegi processed under different conditions 28
Table 7. Statistical analysis of moisture content in Gwamegi processing 30
Table 8. Coefficient regression model estimated by the RSREG procedure for moisture 30
Table 9. TVBN in Gwamegi processed under different conditions 41
Table 10. Statistical analysis of VBN content in Gwamegi processing 42
Table 11. Coefficient regression model estimated by the RSREG procedure for VBN 42
Table 12. TMA in Gwamegi processed under different conditions 46
Table 13. Statistical analysis of TMA content in Gwamegi processing 47
Table 14. Coefficient regression model estimated by the RSREG procedure for TMA 47
Table 15. Three-point hedonic scale for sensory evaluation in Gwamegi 55
Table 16. Sensory Evaluation of Gwamegi processed under different conditions 57
Table 17. Statistical analysis of Fishy smell level in Gwamegi processing 57
Table 18. Coefficient regression model estimated by the RSREG procedure for fishy... 58
Table 19. Statistical analysis of Gwamegi Smell in Gwamegi processing 59
Table 20. Coefficient regression model estimated by the RSREG procedure for Gwamegi... 59
Table 21. Statistical analysis of smell preference in Gwamegi 60
Table 22. Coefficient regression model estimated by the RSREG procedure for Gwamegi... 60
Table 23. Statistical analysis of appearance in Gwamegi processing 61
Table 24. Coefficient regression model estimated by the RSREG procedure for... 61
Figure 1. Three dimensional response surface plots showing interactive (A) drying time... 27
Figure 2. Three dimensional response surface plots showing interactive (A) drying time... 31
Figure 3. Conway unit 38
Figure 4. Three-dimensional response surface plots showing interactive (A) drying time... 44
Figure 5. Three-dimensional response surface plots showing interactive (A) drying time... 48
Figure 6. Three-dimensional response surface plots showing interactive (A) time and... 63
Figure 7. Three-dimensional response surface plots showing interactive (A) time and... 65
Figure 8. Three-dimensional response surface plots showing interactive (A) time and... 68
Figure 9. Three-dimensional response surface plots showing interactive (A) time and... 70