|Monday, April 11th|
9:00 AM - 9:15 AM
Elemental iodine has several potential uses due to its characteristic absorbance and several other factors, including antimicrobial properties, that could make it a good low-cost antiseptic. However, the behavior of iodine at surface boundaries has not been widely explored. Emulsions are systems of two or more solvents that are insoluble in each other, but have been mechanically dispersed and held in suspension by surfactants and other surface-active compounds. This results in several chemical environments present in emulsions due to the different phases and boundary conditions, each with their own unique chemical makeup. In our research we have investigated the behavior of iodine found in these systems by NMR, GC, and other techniques, withthe goal of discovering where and in what ratios the iodine is present.
9:15 AM - 9:30 AM
Protein crystals are classified as nanoporous materials containing large pores that introduce low weight solutes throughout the crystal. Soaking, a term that describes the introduction of protein crystals to new solutions, takes advantage of this property to apply protein crystals to various processes such as chiral separation of enantiomers, catalysis, and high resolution determination of protein structure through x-ray diffraction. My research aimed to investigate and model fracturing induced by hypotonic soaking in hexagonal thermolysin. To ensure reproducibility of results, many variables including the ambient humidity and the orientation of the crystal during soaking proved relevant. Furthermore, a time dependent aspect of hypotonic soaking fracture was identified through the use of NVH oil and a high speed camera. Ultimately a correlation between the concentration gradient of the soak and the degree of fracture was established and
9:30 AM - 9:45 AM
Thermo-optic noise is caused by small temperature changes at the surface of a mirror. It is comprised of both a physical expansion in the mirror coating and changes in the mirror’s reflective properties (which can result in apparent length changes). These length changes were measured with an interferometer where one end mirror was hit by a pumped heating beam. Once data from the interferometer is collected with low enough noise for the thermo-optic response to be visible, the data can be used to calculate coefficients for both the physical expansion and changes in reflective properties of any given mirror. By better understanding thermo-optic noise, the thermo-optic noise threshold can be lowered in high-precision optical measurements such as those being undertaken at the Laser Interferometer Gravitational-Wave Observatory (LIGO).
9:45 AM - 10:00 AM
The 2012 discovery of the Higgs boson by the ATLAS and CMS experiments at the Large Hadron Collider (LHC) marked a new era for particle physics by completing the Standard Model of Particle Physics. Now, after a two-year shutdown, the LHC has begun Run 2 at a higher energy ready to delve deeper into the Standard Model. Further measurements of the properties of the Higgs will solidify physicists’ understanding of this theory. Vector Boson Scattering (VBS) is one fundamental process that will provide that information. The current understanding of this interaction relies heavily on the Higgs boson. With the ATLAS group at Indiana University, I began a study that will help determine the cross-section, or likelihood, of VBS at the higher LHC energy. Comparing the results of this study with data from Run 2 will provide evidence for or against the Higgs’ role in VBS.