Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 3 of 3
Full-Text Articles in Engineering
Self-Consistent Multiscale Modeling In The Presence Of Inhomogeneous Fields, Ruichang Xiong, Rebecca L. Empting, Ian C. Morris, David J. Keffer
Self-Consistent Multiscale Modeling In The Presence Of Inhomogeneous Fields, Ruichang Xiong, Rebecca L. Empting, Ian C. Morris, David J. Keffer
Faculty Publications and Other Works -- Chemical and Biomolecular Engineering
Molecular dynamics (MD) simulations of a Lennard–Jones fluid in an inhomogeneous external field generate steady-state profiles of density and pressure with nanoscopic heterogeneities. The continuum level of mass, momentum, and energy transport balances is capable of reproducing the MD profiles only when the equation of state for pressure as a function of density is extracted directly from the molecular level of description. We show that the density profile resulting from simulation is consistent with both a molecular-level theoretical prediction from statistical mechanics as well as the solution of the continuum-level set of differential equations describing the conservation of mass and …
Effects Of Ultramicroelectrode Dimensions On The Electropolymerization Of Polypyrrole, Benjamin J. Fletcher, Jared T. Fern, Kevin Rhodes, Timothy E. Mcknight, Jason D. Fowlkes, Scott T. Retterer, David J. Keffer, Michael L. Simpson, Mitchel J. Doktycz
Effects Of Ultramicroelectrode Dimensions On The Electropolymerization Of Polypyrrole, Benjamin J. Fletcher, Jared T. Fern, Kevin Rhodes, Timothy E. Mcknight, Jason D. Fowlkes, Scott T. Retterer, David J. Keffer, Michael L. Simpson, Mitchel J. Doktycz
Faculty Publications and Other Works -- Chemical and Biomolecular Engineering
Anode geometry can significantly affect the electrochemical synthesis of conductive polymers. Here, the effects of anode dimensions on the electropolymerization of pyrrole are investigated. Band microelectrodes were prepared with widths ranging from 2 to 500 μm. The anode dimension has a significant effect on the resulting thickness of polymer film. The electropolymerization process deviates significantly from that predicted by simple mass transfer considerations when electrode dimensions are less than ∼ 20 μm. Polymer film thickness is thinner than expected when electrode dimensions become less than ∼ 10 μm. A simple mathematical model was derived to explain the observed effects of …
Metabolic Engineering Of Escherichia Coli For Efficient Conversion Of Glycerol Into Ethanol, Cong T. Trinh, Friedrich Srienc
Metabolic Engineering Of Escherichia Coli For Efficient Conversion Of Glycerol Into Ethanol, Cong T. Trinh, Friedrich Srienc
Faculty Publications and Other Works -- Chemical and Biomolecular Engineering
Based on elementary mode analysis, an Escherichia coli strain was designed for efficient conversion of glycerol to ethanol. By using nine gene knockout mutations, the functional space of the central metabolism of E. coli was reduced from over 15,000 possible pathways to a total of 28 glycerol-utilizing pathways that support cell function. Among these pathways are eight aerobic and eight anaerobic pathways that do not support cell growth but convert glycerol into ethanol with a theoretical yield of 0.50 g ethanol/g glycerol. The remaining 12 pathways aerobically coproduce biomass and ethanol from glycerol. The optimal ethanol production depends on the …