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Full-Text Articles in Physics

Molecular Insights Into The Redox Of Atmospheric Mercury Through Laser Spectroscopy, Rongrong Wu Cohen Dec 2022

Molecular Insights Into The Redox Of Atmospheric Mercury Through Laser Spectroscopy, Rongrong Wu Cohen

Theses and Dissertations

The widespread pollution of mercury motivates research into its atmospheric chemistry and transport. Gaseous elemental mercury (Hg(0)) dominates mercury emission to the atmosphere, but the rate of its oxidation to mercury compound (Hg(II)) plays a significant role in controlling where and when mercury deposits to ecosystems. Atomic bromine is regarded as the main oxidant for Hg(0) oxidation, known to initiate the oxidation via a two-step process in the atmosphere – formation of BrHg (R1) and subsequent reactions of BrHg with abundant free radicals Y, i.e., NO2, HOO, etc. (R2), where the reaction of BrHg +Y could also lead to the …


Manipulating The Properties Of Light-Responsive Active Lipid Bilayer Membranes: Measuring Mechanics And Probing Mechanisms, Arash Manafirad Feb 2022

Manipulating The Properties Of Light-Responsive Active Lipid Bilayer Membranes: Measuring Mechanics And Probing Mechanisms, Arash Manafirad

Doctoral Dissertations

This thesis explores an experimental system probing the effect of energy input (in light-responsive bilayers) on membrane physicomechanical properties and dynamics of response to a trigger. We were inspired by the ability of cell membranes to alter their elastic and permeability properties and shape in response to energy input, change in lipid chemistry, or bilayer composition. Our work demonstrates and sheds new light on the roles of lipid chemical character, light-responsive moieties' incorporation in the membrane, and the lipid bilayer's mechanical properties on membrane response to chemical tuning or energy input. To observe how lipid chemistry affects membrane physical properties …


Characterization Of Nanoparticles Using Inductively-Coupled Plasma Mass Spectrometry, Jabez D. Campbell Jan 2022

Characterization Of Nanoparticles Using Inductively-Coupled Plasma Mass Spectrometry, Jabez D. Campbell

MSU Graduate Theses

Nanomaterials are a relatively new class of materials that have many applications which span a wide host of fields from medical products to consumer products. The possible compositions and forms of nanomaterials are just as varied as the applications. Therefore, a versatile characterization method is needed for researchers and regulators alike to ensure nanomaterials are properly used. Single Particle Inductively Coupled Plasma Mass Spectrometry (SP-ICP-MS) is a functional method that could fill the characterization need in the nanomaterial research field. Using data from both SP-ICP-MS tests and data from literature established characterization methods, the viability of making SP-ICP-MS the standard …