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Monitoring BPA Leaching from Feminine Hygiene Products using Fluorescence Spectrophotometry
Get PDFBisphenol-A (BPA) is a compound commonly used as a stabilizer in plastic products, including food storage containers and thermal paper receipts. Because BPA can bind to and activate estrogen receptors, it is linked to reduced fertility, altered development, and hormone-related cancers. A recent study at NYU Medical School confirmed the presence of BPA in pantyliners, pads, tampons, feminine washes and deodorants. This is concerning due to the high absorption capacity of the vulvar skin.
For the research performed in our lab this summer, the goal was to determine if fluorescence spectrophotometry could be used to determine the presence of BPA in feminine hygiene products by monitoring the release of BPA over time into a solution of 50% methanol/water. Fluorescence is a sensitive, selective and affordable method of analysis, and BPA is a fluorescent compound that absorbs energy at 278 nm and emits at 304 nm. First, a calibration curve was obtained and analytical figures of merit were determined: linear range, limit of detection and limit of quantitation. Due to the complex sample matrix and the small concentrations of BPA in these products, the standard addition method was employed for analysis. Pantyliners, tampons and tampon applicators were tested for the presence of BPA.
The top/outside layer of the feminine hygiene product which comes into direct contact with skin was removed and cut into small pieces. In the case of tampon applicators, the entire applicator was utilized. Samples were then placed into beakers containing 100 mL of 50% methanol/water solution, one per time point to be tested from 0 minutes to 6 hours. At each time point, aliquots of sample solution were removed and transferred to 25-mL volumetric flasks containing various concentrations of BPA stock solution and diluted to 25-mL with 1:1 methanol/water solution. Fluorescence emission intensities at 304 nm were obtained in quadruplicate, and standard addition graphs were utilized to determine the concentration of BPA that had leached from the sample at each time point. Graphs were prepared using these values to produce a visual representation of BPA leaching from the sample over time
History, Methods, and Psychology of Illustrations in Children\u27s Literature
Get PDFThis was a two-part project that included a research element and a creative element. The essay paper includes research in multiple areas within illustration in children’s literature including the history of how illustration has developed in children’s literature, some of the methods in which children’s illustrations are created, and the psychology behind the effects of illustration in children’s literature.
The second part of the project was the creation of a children’s book. This book is designed to educate readers on the basics of illustration methods and to inspire children to value creation and creativity
Educational Opportunities for the Aspiring Aquatic Professional: A Qualitative Analysis of Experience-Based Building Blocks for Success
No full textFrom Buffaloes to Badgers: How African Americans Endured Integration in Arkadelphia Schools
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Sensory Safe Rooms on Ouachita\u27s Campus
No full textThis presentation proposes a solution for how to make Ouachita\u27s campus more inclusive to those with intellectual disabilities
Ouachita\u27s Department of Theatre Arts presents the musical Mary Poppins from April 20-23
Get PDFThe Department of Theatre Arts in Ouachita Baptist University’s School of Fine Arts will present its spring musical, “Mary Poppins,” from Thursday-Sunday, April 20-23 in Jones Performing Arts Center. Performances will begin Thursday-Saturday at 7:30 p.m., with a 2:30 p.m. matinee on Sunday. Tickets may be purchased at obu.edu/boxoffice.
Based on the book series “Mary Poppins” by P.L. Travers, the story follows the Banks family as they employ a new nanny, Mary Poppins, who magically shows up at their door and changes the environment of their household