Hygroscopicity of Cholesterol in Various Organic Solvents
| dc.contributor.advisor | Asa- Awuku, Akua | en_US |
| dc.contributor.author | Barati, Farima | en_US |
| dc.contributor.department | Chemical Engineering | en_US |
| dc.contributor.publisher | Digital Repository at the University of Maryland | en_US |
| dc.contributor.publisher | University of Maryland (College Park, Md.) | en_US |
| dc.date.accessioned | 2019-06-19T05:30:56Z | |
| dc.date.available | 2019-06-19T05:30:56Z | |
| dc.date.issued | 2018 | en_US |
| dc.description.abstract | Organic aerosols and partially soluble particles can uptake water, form droplets and act as Cloud Condensation Nuclei (CCN). Cholesterol is a well-known organic aerosol. Cholesterol is insoluble in water (<0.002 gram in 100 ml of H2O) but dissolves in organic solvents. In this study, we examine the ability of cholesterol generated in three dilutions of 3 alcohols (ethanol, isopropanol and acetone) to act as CCN. The apparent hygroscopicity, κ, varies over two orders of magnitude, from ~ 0.001 to 0.1. We use statistical analysis of variance (ANOVA) to define significant physical and chemical factors that modify κ. Results show that as volume of water increases, κ changes. However, the type of alcohol does not significantly modify the hygroscopicity. Increases in alcohol concentration decrease droplet surface tension and change aerosol shape. Thus, the apparent κ is corrected with surface tension and shape factor data and estimated to be ~0.028 ± 0.02. | en_US |
| dc.identifier | https://doi.org/10.13016/bm6i-2p3x | |
| dc.identifier.uri | http://hdl.handle.net/1903/21866 | |
| dc.language.iso | en | en_US |
| dc.subject.pqcontrolled | Chemical engineering | en_US |
| dc.title | Hygroscopicity of Cholesterol in Various Organic Solvents | en_US |
| dc.type | Thesis | en_US |
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