Open Access. Powered by Scholars. Published by Universities.®
- Discipline
- Keyword
Articles 1 - 3 of 3
Full-Text Articles in Chemistry
Determination Of Nitrate In Aqueous Media, Ebony Arauz Tellez, John Bohannon, Rebecca Mills, Virginia Tam, Isabelle Villarreal, Melissa C. Rhoten
Determination Of Nitrate In Aqueous Media, Ebony Arauz Tellez, John Bohannon, Rebecca Mills, Virginia Tam, Isabelle Villarreal, Melissa C. Rhoten
Spring Showcase for Research and Creative Inquiry
Determining the amount of inorganic ions in aqueous media is important in the food industry and environmentally. In the environment high levels of ions like nitrate (NO3-), nitrite (NO2-), and phosphate (PO43-) can lead to unhealthy conditions for aquatic species. Similarly, high levels of nitrate and nitrite can cause health issues in humans. One method for determining nitrate levels in aqueous samples involves reducing the nitrate species to nitrite via a redox reaction with finely divided zinc powder followed by conversion to a diazonium salt and complexation with 1-napthylamine to form a …
Is It Useful? Orthophosphate Mapping Of An Excavated Cellar Of A Mid 1700’S Tavern In New London Va, Thomas M. Bender, Randy Lichtenberger
Is It Useful? Orthophosphate Mapping Of An Excavated Cellar Of A Mid 1700’S Tavern In New London Va, Thomas M. Bender, Randy Lichtenberger
Faculty Publications and Presentations
The partially backfilled cellar of Mead’s Tavern (VDHR # 015-0120) a circa 1760’s building in New London Virginia, was studied by orthophosphate (PO43) mapping of the recently exposed, culturally sterile, subsoil floor. Prior studies of the cellar had exposed a hearth along with features that were speculated to be wall partitions for subdivision of the cellar. The full intended purpose for those exposed features is unknown. To further probe that exposed subsoil prior to a major engineering stabilization of the tavern’s foundation, a chemical mapping of surface PO43- levels in the cellar was done. The …
Synthesis Of Asymmetrically-Substituted Tetraphenyl-Class Porphyrins, William J. Davis
Synthesis Of Asymmetrically-Substituted Tetraphenyl-Class Porphyrins, William J. Davis
Summer Scholarship, Creative Arts and Research Projects (SCARP)
Porphyrins are macrocyclic compounds that can be synthesized and used in photodynamic therapy (PDT), a noninvasive and selective method designed to eliminate diseased tissue (such as cancer) without killing healthy tissue. PDT involves the following three steps. A photosensitizer enters a cancerous cell, is excited by electromagnetic radiation, and transfers the energy to molecular oxygen which is then converted into singlet oxygen, which triggers cellular apoptosis. However, for a porphyrin to be utilized as a therapeutic in PDT, it must satisfy the following two criteria: the porphyrin needs to possess the correct solubility to pass through the cell membrane and …