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Full-Text Articles in Physical Sciences and Mathematics
Wavenumber-Dependent Complex Refractive Indices Of Synthetic Motor Oil By Aerosol Extinction Spectra, Daniel Olesak
Wavenumber-Dependent Complex Refractive Indices Of Synthetic Motor Oil By Aerosol Extinction Spectra, Daniel Olesak
DePaul Discoveries
Wavenumber-dependent, complex refractive indices, or optical constants, in the mid-infrared for unused Pennzoil 0W-20 motor oil have been obtained from aerosol extinction spectroscopy at room temperature. The oil’s spectroscopy is dominated by carbon-hydrogen stretching modes similar to those observed in spectra for pure alkanes. These same characteristic features were observed in a previously reported motor oil study. The optical constants retrieved here are an addition to the small number of data sets in the scientific literature for organic compounds many of which are components of aerosols present in the lower troposphere, particularly in urban areas. Such data offer new perspectives …
Life Cycle Assessment Of Four Different Sweaters, Sarah Nolimal
Life Cycle Assessment Of Four Different Sweaters, Sarah Nolimal
DePaul Discoveries
Life cycle assessment (LCA) is a methodological tool to describe the impacts of a product over its lifetime, from ‘cradle to grave.’ Despite increased employment of LCA, textile LCA studies are often private, outdated, not transparent, or lack accurate data. Further, we know of no LCA study specific to sweaters. This screening LCA combines published literature and data from OpenLCA databases (Ecoinvent 3.3 and GaBi Professional) to conduct a comparative LCA for four sweaters. To determine the composition of these sweaters, we massed and assessed the material composition of 117 sweaters in October 2015. Based on results, our study compares …