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Full-Text Articles in Physical Sciences and Mathematics
Analyzing Free-Base Nicotine Content In The Particulate Matter Of Mainstream Tobacco Smoke Using A Headpace Solid-Phase Microextraction Gc/Ms Method, Christopher S. Motti
Analyzing Free-Base Nicotine Content In The Particulate Matter Of Mainstream Tobacco Smoke Using A Headpace Solid-Phase Microextraction Gc/Ms Method, Christopher S. Motti
Civil and Environmental Engineering Master's Project Reports
The acid/base chemistry of cigarette smoke allows nicotine, the primary drug in mainstream tobacco smoke, to exist in protonated and free-base forms. Evidence suggests that most of the nicotine present in mainstream tobacco smoke is in the particle phase. αfb is the fraction of particle-phase nicotine in the free-base form. The magnitude and rate of nicotine deposition in the respiratory tract is dependent on αfb because only the free-base form of nicotine can volatilize from the particle phase of an inhaled aerosol and, once gaseous, rapidly deposit. This study develops a headspace solid-phase microextraction technique coupled with gas …
Geotechnical Statistical Evaluation Of Lahore Site Data And Deep Excavation Design, Aiza Malik
Geotechnical Statistical Evaluation Of Lahore Site Data And Deep Excavation Design, Aiza Malik
Civil and Environmental Engineering Master's Project Reports
Geotechnical characterization for foundation design is critical during preliminary planning, designing and feasibility studies of various engineering projects. In this research, an effort has been made to develop a geotechnical database for the city of Lahore, Pakistan. This database would aid geologists and engineers involved in the geotechnical design and planning of engineering projects in Lahore. The project area has been divided into zones geographically. Soil profiles have been developed for all zones, which provide ranges of soil properties and SPT-N values at regular intervals. Furthermore, the research also focuses on deep excavations in urban areas of Lahore, Pakistan and …
Dispersion Modeling Of Nitrogen Dioxide (No2) And Fine Particulate Matter (Pm2.5) From Backup Generators At Data Centers In Prineville, Oregon, Brooke E. Harmon
Dispersion Modeling Of Nitrogen Dioxide (No2) And Fine Particulate Matter (Pm2.5) From Backup Generators At Data Centers In Prineville, Oregon, Brooke E. Harmon
Civil and Environmental Engineering Master's Project Reports
As our society becomes increasingly dependent on digital communication (e.g., social media and email) and computerized storage (e.g., digitized medical records and government documents), tech giants such as Google, Facebook, and Apple are constructing and managing an increasing number of massive Internet data centers. These data centers house a network’s most critical systems and are vital to the continuity of daily operations. Requiring as much electricity as a medium size city, data centers rely on complex auxiliary power systems to prevent disruption to service. These backup systems consist of tens of multi-megawatt diesel-powered generators that release combustion byproducts, including over …