Title Page
Contents
LIST OF ABBREVIATIONS 9
ABSTRACT 11
Ⅰ. INTRODUCTION 12
Ⅱ. MATERIALS AND METHODS 15
2.1. Porous structure theoretical analysis 15
2.2. Parameters for the evaporation time 19
2.3. Preparation of colloidal suspensions 20
2.4. Visualization of aerosols 21
2.5. Preparation of low surface-energy surfaces for droplet evaporation 22
2.6. Preparation of droplets containing bacteria and particles 23
2.7. Evaporation of droplets for forming residues 23
2.8. Bacterial viability test 25
2.9. Porous structure optical analysis 25
2.10. Data analysis and statistical analysis 26
Ⅲ. RESULTS 26
3.1. Experimental analysis of viability 26
3.1.1. Theoretical model for prediction of evaporation time of porous residues 26
3.1.2. Bacterial viability in bioaerosols containing bacteria and PM 31
3.1.3. Evaluation of viability depending on the structure 34
3.1.4. Analysis of main viability factors 37
3.2. Comparison of experimental and theoretical results 40
3.3. Aggregation form by RS and RC 43
Ⅳ. SUMMARY & CONCLUSION 45
Ⅴ. REFERENCES 47
APPENDICES 10
Appendix 1. Parameters and values to predict the porous structure and drying time of residues consisting of particles and bacteria. 54
Appendix 2. Decreasing viability rate experimentally obtained from t₁ to t₂ in each experimental case. 55
ABSTRACT IN KOREAN 56
Fig. 1. Evaporation stages and local structures of porous media composed of bacteria and particles. 27
Fig. 2. Culturable bacteria dispersed by aerosols and visualization of aerosols containing bacteria and particles. 33
Fig. 3. Bacterial viability according to bacterial concentration and microparticle size. 36
Fig. 4. Changes in the volume and volume ratio of residues composed of different-sized particles and bacterial concentrations. 39
Fig. 5. Comparison of experimental viability and theoretical evaporation time. 42
Fig. 6. Illustrations of porous structures according to the RS and RC of bacteria to particles. 44