Bulletin of the American Physical Society
17th Annual Meeting of the APS Northwest Section
Volume 61, Number 7
Thursday–Saturday, May 12–14, 2016; Penticton, British Columbia, Canada
Session D2: Poster Session I |
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Chair: Anna Goussiou, University of Washington Room: Center of Excellence 2nd Floor Mezzanine |
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D2.00001: ABSTRACT WITHDRAWN |
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D2.00002: Optical dipole potentials using a digital mircomirror device Chunde Huang, Vandna Gokhroo, Peter Engels Ultra-cold atoms, trapped in arbitrary shaped miniaturized potentials, have interesting applications in many body physics, quantum information etc. Here we use a digital micromirror device (DMD) as a spatial light modulator to generate arbitrary dipole potentials with controllable intensity. DMDs are fast, flexible and economical. Such a device may be very useful for a wide range of Bose Einstein Condensate (BEC) experiments where control over the profile of the light source is required. In order to generate a desired dipole potential, the DMD is controlled by a software system which is being developed in house such that pattern design and simulation work efficiently. It also implements algorithms for other general experimental purposes such as intensity modulation for uniform beams, automatic light profile compensation for non-uniform beams and optical setup assistance. Here we present the current progress of our DMD project aimed towards BEC experiments and discuss the capabilities and limiting factors. [Preview Abstract] |
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D2.00003: Mesoscopic Modelling {\&} Spinterface Fatahillah Hidajatullahajj-Maksoed, Yunilla Zulfania,SE Mesoscopic modelling of complex systems involves thermodynamics nonequilibrium of discrete scaling of entropy reduction $+$ fluctuation, nonlinear dynamics {\&} complexity of self-organized spatio-temporal structure -- Zhonghuai Hou: ``Nonlinear Dynamics {\&} nonequilibrium Thermodynamics in Mesoscopic Chemical Systems''. ``Electron exchange {\&} electron -- or phototriggered electron exchange which are 2 central topic in related fields of molecular magnetism {\&} molecular spintronics through control of an external (optical, redox and/or magnetic ) properties in te use of several physics (spectroscopics, magnetic, electrochemical and/or photochemical)''- Maria Castellano-SANZ : ``Oxamato-based dicopper(II) metallo cyclophanes as Prototype of Magnetic Device for Molecular Spintronics'', Dissertation- 2013. Obeys analytical studies of common mechanism of previously named ``spinterface'' have been forecast through ``mesoscopic physics of electrons {\&} photons'' from E. Ackermans {\&} Gilles Montambaux of e.g the ability to control spin polarization coincides with electromechanical coupling effect between electric polarization {\&} mechanical strain gradient. [Preview Abstract] |
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D2.00004: DC C-axis Electrical Resistivity of FeSe Superconductor Dhaneesh Kumar, Doug Bonn Superconductivity in iron pnictides is an area of interest for the condensed-matter community. The relatively high critical temperature ($T_{C})$ of 26 K first observed in 2008 in one of these materials offered new opportunities for research. Iron (II) selenide (FeSe), which has the simplest crystal structure among the iron-based superconductors (FeSC) has a $T_{C}$ of about 8 K. FeSe, because of its simple crystal structure, is a material at the center of understanding the superconducting mechanism in FeSCs. Understanding the electrodynamics of FeSe is one such focus. Previously, no known measurements have been made of the DC c-axis electrical resistivity although the resistivity in the ab-plane of FeSe is well-documented. This study is aimed at measuring this quantity using standard experimental procedures which include a four-wire measurement and the modified Corbino method for electrical contacts. This study found that the magnitude of the resistivity in the c-axis direction is much greater than in the ab-plane as expected. Further, the resistivity as a function of temperature illustrates values of $T_{C}$ and the structural transition temperature, $T_{S}$, that agrees with values observed with ab-plane measurements. [Preview Abstract] |
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D2.00005: Numerical Solution of Quantum Cosmological Model Simulating Boson and Fermion Creation Vic Christianto, Florentins Smarandache A numerical solution of Wheeler-De Witt equation for a quantum cosmological model simulating boson and fermion creation in the early Universe evolution is presented. This solution is based on a Wheeler-DeWitt equation obtained by Krechet, Filchenkov, and Shikin, in the framework of quantum geometrodynamics for a Bianchi-I metric. Further discussions should take into account a few implications of the solution of Wheeler-DeWitt equation. Considering that the Schrodinger equation can be used to solve the Casimir effect, therefore one may expect that there exists some effects of Casimir effect in cosmological scale, in a sense that perhaps quite similar to Unruh radiation, which can be derived from the Casimir effective temperature. Anosov has pointed out a plausible deep link between Casimir effect and the fine structure constant by virtue of the entropy of coin-tossing problem. However apparently he did not mention yet another plausible link between the Casimir effective temperature and other phenomena at cosmological scale. Other implication may be related to the Earth scale effects, considering the fact that Schrodinger equation corresponds to the infinite dimensional Hilbert space. [Preview Abstract] |
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D2.00006: Extension of the Bing Bang Theory to Cycles of Beginning and Ending Florentin Smarandache Considering the Big Bang Theory, stating that the universe has begun through an explosion of a primeval atom, based on the Christianity believe that the universe was created, the following questions will naturally occur: a) where did this primeval atom come from?; b) what was before this big bang? In order to overcome these questions and provide some answers, we should rather suppose that there is no beginning or ending but cycles of beginning and ending, inspired by Hinduism. Cosmology should be looked at as a periodical beginning/development/ending cycles. Scientific facts in support of this extension: The red shift (Hubble, 1929) that galaxies are moving further from the Milky Way at great speeds, and the existence of cosmic background radiation (A. Penzias -- R. Wilson, 1964) can still be explained in this model of beginning-ending cycles since they manifest in our cycle of beginning-ending. The universe in each of its cycles should be characterized by homogeneity and isotropy. Each cycle is a temporal sub-universe of the whole universe. [Preview Abstract] |
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D2.00007: Stability Analysis of Metal Oxide Compounds Used in Combustion Reaction by Computational and Physical Method Jaewoo Kim, Byul Sohn, Jaewon Lim The theoretical structure of feasible catalytic compound is presented in this study. The physical activity and chemical stability of catalytic compounds are proposed after modeling and analyzing the molecule based on the compounds’ electron structures, and bond lengths and bond strengths. The ultimate goal of presented research is to achieve better selectivity in producing green energy. Also convergence test of the proposed molecules is carried out to determine the stability of the metal oxides. Numerical and computational methods are used in order to model the electron properties of the compounds. Computational steps(N) versus energy(kcal/mol) curves for each metal compounds are presented to check the stability and convergence of the molecules. [Preview Abstract] |
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D2.00008: ConnesFusionTensorProduct/Photon GluonFusion in Mitochondria Fatahillah Hidajatullahajj-Maksoed As in AJ Wassermann distinguished of classical invariant theory {\&} quantum invariant theory subfactor, in S. Palcoux:''From Neveu-Schwarz Subfactors {\&} Connes Fusion'' described the subfactor theory {\&} Witt-algebra whereas Andreas Thom's explanation about ConnesFusionTensorProduct/CFTP related Connes fusion to composition of homomorphism (i). classical tensor product O-X adds the changes,(ii). Relative tensor product H-X preserve the changes. For photonGluonFusion/PGF defined:''photon is the gauge boson of QED, the simplest of all boson'' devotes to CFT as ``quantum field theory which are invariant under conformal transformation {\&} in 2D there are infinite dimensional algebra. Alain Connes states theirselves Connes fusion as ``associative tensor operation'' to be in coincidences with ``their dynamic behavior driven by the balance in mitochondrial fusion {\&} fission (Carveney, 2007 ) from Peter Alexander Williams: ``Retinal neuronal remodeling in a model of Optic Atrophy'', Dec, 2011. [Preview Abstract] |
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D2.00009: Biological Derived Nanomotors in a "Domino Fashion'' Titania Elaine-Rudyatmo,dr.SpA, Fatahillah Hidajatullahajj-Maksoed For disproportionation of H2O2, also sought an electrokinetic mechanism they appear. So far, the more efficient micro/nanoscale motors are derived from biological systems [2003]. Besides, a control experimenting using 3 stripped Au/Pt/Au rods with catalyzed the composition of H2O2, at similar rate-Walter F. Paxton: ``Catalytic Nanomotors'', JACS- 2004. Also accomplished the HCCI quotes from Martin Frackowiak, 2009 just in several characters seems as parities of IGNITION of nietig/nullify through IceCube document project held since Oct 11, 2001 `ve concludes ``saw none'' so they can follows the ITER/IFMIF. Refers to S29286 file in UI retrieved:''magnetic quantum-dot cellular automata which is nonvolatile \& lower power consist of nanomagnets. Since they are magnetically coupled, logic can be performs by switching, on the other hand in a domino fashion..''-A. Klenm:''Fabrication of Magnetic Tunnel Junction-based Spintronic Devices'', convocation, Aug 11-14-2010 [Preview Abstract] |
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D2.00010: A Maximum Path-Entropy Analysis of Calcium Ion-Channel Gating. Roy Campbell The principle of maximum path-entropy, a generalization to non-equilibrium systems of the principle of maximum entropy familiar to students of equilibrium statistical mechanics, has been used to analyze ion-channel gating. We have analyzed the gating of Inositol trisphosphate receptor (InsP3R), a membrane protein acting as a calcium channel. Various aggregated Markov models for InsP3R were tested and model parameters were determined by applying the principle of maximum path-entropy to patch-clamp gating data. [Preview Abstract] |
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D2.00011: Tracking Microtubules Along an Axon Brianna Owen, Erin Craig-Ricketson, Nathan Kuwada, Peter Baas, Anand Rao Microtubules (MTs) are rigid polymers in the skeleton of eukaryotic cells that provide mechanical support and are involved in various intracellular processes. In the nerve cells, the axon protrudes out from the cell body, and is spanned by MTs of various lengths providing mechanical strength and a pathway for intracellular transport by motor proteins, such as cytoplasmic dynein. Short MTs are transported along this pathway to assemble and maintain MT bundles. Understanding physical mechanisms behind this process is important because it is essential for proper cell growth. Improper cell growth is associated with neurodegenerative diseases. This is an ongoing investigation of factors involved the movement of MTs along an axon. We hypothesize the involvement of several molecular motors of competing polarity in MT transport to produce characteristic movements of short MTs. To characterize the movement, fluorescently labeled MTs are imaged using fluorescence recovery after photobleaching (FRAP) microscopy under control conditions and treatment with Ciliobrevin D, to inhibit dynein function. The resulting time-lapse movies were processed using ImageJ to extract data including the average velocity and pausing time. This information allows refinement of current computational models. [Preview Abstract] |
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D2.00012: Model CT Scanner Owen Paetkau, Zachary Parsons, Mark Paetkau A computerized tomography (CT) scan is generally formed from a series of X-ray images combined via a computer algorithm into a tomographic (cross-sectional) picture. The CT scan allows the inside of an object, usually a human being, to be examined without invasion. While typically CT scans are made with x-rays, the principles of CT scans may be studied with other rays (waves). In this study a model CT scanner was created using visible laser light and beta radiation and an appropriate detector to scan objects. Intensity readings were analyzed using a simple back-projection algorithm which resulted in an images of the scanned objects. The apparatus makes the study of CT algorithms and principles attainable at the undergraduate level. [Preview Abstract] |
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D2.00013: Computational model of microtubule transport in axons Howard Yeung, Anand Rao, Nathan Kuwada, Peter Baas, Erin Craig Neurodegenerative diseases, such as Alzheimer's, affect millions of people and cost the US economy over \$100 billion annually. Microtubules (MTs) are cytoskeletal protein complexes that play a critical role in the structure of healthy nerve cells, and while the underlying mechanisms are not well understood, disruption of the MT bundle polarity pattern is associated with neurodegenerative diseases. MTs align in the axon to create a long bundle of polarized filaments that extend throughout the cell. The coordinated transport of short MTs along the axon by motor proteins is essential for the establishment and maintenance of an organized bundle. We present a computational model of MT transport along the axon, based on the hypothesis that this movement is driven primarily by cytoplasmic dynein through a sliding filament mechanism. Our model allows for the possibility that motor proteins of opposite polarity can attach to the same MT, creating a mechanical “tug-of-war.” Results show that as MT length increases, average velocity increases due to MTs spending less time stalled by the “tug-of-war”. We conclude that a motor protein "tug-of-war" is insufficient to explain the experimental observation that the average velocity of MT transport in the axon is inversely related to MT length. [Preview Abstract] |
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D2.00014: Similar Hamiltonian Between Avalanche-effect {\&} Sociophysics' Nitia Anissa,SE, Fatahillah Hidajatullahajj-Maksoed Of similar Hamiltonian concerned in ``sociophysics'', there were RandomFieldIsingModel/RFIM in external field retrieved in S. Sabhapandit:''Hysteresis {\&} Avalanche in RandomFieldIsingModel'', 2002:'' ..in earthquake, it is an energy release and in case of ferromagnet, it is the size of the domain flips''. Following the extremes {\&} compromises curve in Serge Galam: ``Sociophysics: a Review of Galam Model'', 2008 fig. 12, h 9 whereas it seems similar with ``heating curve''-Prof. Ir. Abdul Kadir: ``Mesin Arus Searah'', h 192 when the heat sources are continuous denote continuous opinion dynamics. Further, hysteresis as duties in ``Kajian Analisis Model Mikromagnetik dari Struktur Magnet Nanokomposit'', 2007 [ UI file no. S29286 ] also sought :''calculate the probability that `one more site became unstable' causes an avalanche of the spin flips\textellipsis '' usually found in Per Bak sand-pile fractal characters experiment exhibits. [Preview Abstract] |
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D2.00015: Novel Properties Of Quantum Materials Physics WH- Maksoed,SSi Accompanying classical constitutive equations from continuum mechanics, there sought novel properties of quantum materials physics at least after A.Chipouline,{et.al}: {``Analytical Model for Metamaterials with Quantum Ingredients''. }It become inspired in Depok, 2003 by Dr.rer.nat Martarizal of his ``Discrete Electronics'' lecture but come from analog circuitries then enhanced by ``discrete mathematics''. ``Interacting classical {\&} quantum resonant'' investigates its correlation through multifractal for Itai Panas: {Super-Atom Representation of High-Tc Superconductivity'' }completes by Yu E Kuzovlev:{''Quantum Brownian motion {\&} a theorem of Fundamental 1/f Noise''.}June 2012. A studies of laters of TIPSb {\&} fermionic motions, come from P. Dutta,{et.al}:{Anomalous Thermal Expansion of Sb2Te3 Topological insulators, }June, 2012 and Andrea Capelli: {Composite Fermion Wavefunctions derived by Conformal Field Theory'' } June 2012, in his counterpart of Commodity Future Tradings. [Preview Abstract] |
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D2.00016: Study on the Spectrum of Violin and Other Instruments Using Computational Simulations Heekyoung Woo, Richard Kyung Most sounds are comprised of a complex mixture of vibrations. An intricate combination of high notes and low notes make up the integrated sound of melodious music. In this paper, a sound spectrum of violins is presented as a graph of power as a function of frequency, and it is compared to spectra of other instruments such as piano, cello, flute and trumpet. By examining the spectrum of the note, a number of prominent components at a special set of frequencies are observed using the Matlab program. Several instruments have strong energy in the harmonics other than in the fundamental frequency. For example, the flute and piano show the least harmonics and some other instruments have most of their energy in the first and third, or fifth harmonics rather than the base frequency; however, string instruments have relatively strong third harmonic components. Therefore, these characteristics can be used to synthesize artificial sound of instruments to test a performance of the sound quality, and even to identify individual instruments when the instrument is played in an orchestra. [Preview Abstract] |
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D2.00017: Quantification of sensitivity of mountain glaciers to climate change with the use of a block model Eviatar Bach Despite comprising a small fraction of the Earth's total ice volume, melting of mountain glaciers due to climate change constitutes a significant contribution to sea level rise. Mathematical models of volume evolution of mountain glaciers are thus important in projecting sea level into the future. While state-of-the-art ice-flow models for glaciers exist, these rely on detailed data about the bed and surface of the glacier, data that is available for only a few glaciers worldwide. We derive and analyze a new model, extending previous work on a simple block model for glacier volume response to make it more physically realistic. We then apply it on a global scale with data from the Randolph Glacier Inventory in order to estimate the regional sensitivity of glaciers to climate change. [Preview Abstract] |
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D2.00018: Study of the Pressure Changes Across the Cardiovascular System Using Numerical and Computational Simulations In-won Chang, Richard Kyung Circulatory system disease has induced a growing concern for information on bio-fluid flow analysis in our cardiovascular system. The biomedical engineering approaches have been theoretically and numerically developed with computational and advanced biophysical simulations. In this paper, studies based on the numerical and computational biomechanics of blood flow in the stenosed aortic valve have been carried out. The aortic stenosis leads to a pressure and velocity change across the valve during the time in which blood flows through the valve opening. This aortic valve gradient is expressed as an increase and a decrease on each side of the defective valve. In this paper, the continuity equation and Gorlin equation are used to find the cardio factors affecting the aortic stenosis. Aortic Valve Areas (AVA) are calculated based on the different pressure gradients across the aortic valve. Computational simulations are carried out using the Matlab program. The results of the subject study show that severe aortic stenosis causing systolic dysfunction in the left ventricle depends on the transaortic velocity and pressure. [Preview Abstract] |
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D2.00019: Tracing the source of CO$_{\mathrm{2}}$~in a classroom at the University of Calgary Luis Toth Increasing carbon dioxide concentrations in the atmosphere are associated with global climate change and the sources of CO$_{\mathrm{2}}$~are largely from the combustion of organic matter.~ The link between the source of carbon and the CO$_{\mathrm{2}}$~that is produced can be demonstrated by exploring the stable isotopic composition of the CO$_{\mathrm{2}}$~and the carbon in the organic material.~ The relative amounts of~$^{\mathrm{13}}$C and~$^{\mathrm{12}}$C are distinct depending on the origin of the carbon and this is largely preserved in the CO2 that is produced.~ In this project, variations in CO2 and the isotopic composition of the carbon were investigated in order to identify the sources of this gas in a lecture theater at the University of Calgary.~ Samples were taken over an eight-hour period as well as an atrium on campus.~ Additional samples were also taken at different locations in Calgary and Okotoks, Alberta to create comparison data for urban versus rural locations. A Thermoscientific DeltaRay Isotope Ratio Spectrometer was used to analyze CO2 concentrations and carbon isotopic compositions.~ Data show increasing levels of CO2 in the classroom over the course of the day, which are associated with the metabolism of organic matter, which we attribute to the presence of students in the room. [Preview Abstract] |
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D2.00020: A Novel Toroidal Split-Ring Resonator & RF Measurements of Electromagnetic Material Properties Jake Bobowski, Aaron Clements We describe a novel toroidal split-ring resonator (SRR) design that allows one to make accurate and precise measurements of the electromagnetic (EM) properties of various materials. The toroidal geometry avoids large radiation losses associated with conventional cylindrical SRR designs which allows one to design a compact rf resonator that maintains high quality factors without requiring additional EM shielding. The toroidal SRR has been used to measure the real and imaginary components of the complex permittivity of methyl alcohol at 175 MHz. We have also used this apparatus to measure the temperature dependence of both the dielectric constant of liquid nitrogen from 63 to 77 K and the resistivity of copper from 77 to 300 K. Finally, we describe a low-frequency (1 GHz) electron spin resonance (ESR) experiment based on the toroidal SRR and other future applications. [Preview Abstract] |
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D2.00021: A New Field Theory Richard Kriske It may be that Special Relativity, is actually formulated in the Reverse Order in which it works in Nature. In SR, there are Invariants in 4 space which project onto two Observer's Frames. From those observations and Communications between the Observer's they can surmise what is a Real Phenomena, what is an Event. There is a Problem with this formulation. This variation is done in one of the Reference frames, but once done, a Photon is created, which then can be Observed in both Reference frames. In a way, the Theory of Relativity, is stating that in order for an Invariant to be formed there has to be at least two Observer's or two Time Dimensions. This is not completely obvious from Electromagnetic Photons, but what if there is a whole zoo of Photons? Perhaps one could view the Meson as a Photon, but made up of quark anti-quark fields. Perhaps one could view the Neutrino as a Photon made of three fields intertwined instead of two as in the EM Photon. This author is proposing a New Field Theory, where a Static Field is varied in one frame and depending on the Frame it is varied in, intertwines with other fields, much like the Maxwell's Equations. For example when the Higg's field is varied it produces intertwinings in more than two fields. This is Kriske's Field Theory. [Preview Abstract] |
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D2.00022: Open question: What is the Maximum Chain Length of Orbiting Bodies? Florentin Smarandache In the macrocosmos, let's consider an astronomical body ($A_{1})$, around which orbits another astronomical body ($A_{2})$, and around ($A_{2})$ orbits another astronomical body ($A_{3})$, and again around ($A_{3})$ orbits another astronomical body ($A_{4})$, and so on. Let's call such astronomical bodies ($A_{1}, A_{2}, A_{3}, A_{4})$, as a chain of orbiting bodies. At level three ($A_{1}, A_{2}, A_{3})$ we know: Sun, Earth, and Moon. What is the maximum chain length of such astronomical bodies that has been discovered in the universe, $A_{1}, A_{2}, A_{3}, ..., A_{n} ( n = ? ),$ and what might be the hypothetical largest chain length of orbiting bodies in the macrocosmos ? Similar questions in the microcosmos. Then the questions extended to the macrocosmos-microcosmos put together. [Preview Abstract] |
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D2.00023: Determining The Zinc Effects on phytoplankton communities' growth in the Open Oceans Fwziah Mohamed, Michael Wieser Researchers have intensively studied the Iron hypothesis, which illustrated the influences of the iron cycle on phytoplankton communities’ growth, and thus in the global carbon cycle. Attention has now turned to confirming a possible Zinc hypothesis. Zn is a toxic heavy metal which can cause considerable health problems to humans and phytoplankton. The interactions between phytoplankton and Zn are often discussed in terms of the limitation or co-limitation concept. The questions are: Is Zn limiting or co-limiting the phytoplankton growth and diversity as well as the abundance of different phytoplankton communities? Is phytoplankton regulating the distributions, chemical speciation, and cycling of Zn through cellular uptake and recycling processes, which, as a negative feedback, can influence the biogeochemistry of the ocean and the whole earth system? To investigate Zn effects in the open oceans, it is necessary to identify Zn emissions from biogenic and anthropogenic sources. Stable Zn isotopic compositions can help to identify and quantify sources of Zn. This presentation will explore our current knowledge of Zn isotopic compositions from industrial and biological sources and explain how this knowledge may be used to understand the biogeochemical processing of Zn. [Preview Abstract] |
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D2.00024: The expression levels of cellular prion protein affect copper isotopic shifts in the organs of mice Kerri A. Miller, Catherine M. Keenin, Gary R. Martin, Frank R. Jirik, Keith A. Sharkey, Michael E. Wieser Copper isotopic fractionations can occur in biological systems during metabolic processes. Determining the distribution of Cu isotopes in the body can provide a detailed understanding of Cu processing. We measured the Cu isotopic composition of specific organs in transgenic mice. The strains of mice include wild type (WT, n$=$4), prion knockout (\textit{Prnp}-/-, n$=$3), and a strain of mice that had a mutation in the copper binding sites in the N-terminus of PrP$^{\mathrm{c}}$ (Cu-del, n$=$5). We found the liver, kidney and brain tissue samples to be enriched in $^{\mathrm{65}}$Cu compared to the food. When comparing the difference in isotopic composition between two organs or bodily fluids, or the \textit{isotopic shift}, in each individual mouse we observed genotype dependent isotopic shifts between the food and intestinal regions and between the serum and select brain regions. We attribute these differences in isotopic shifts to changes in Cu processing within the organs. Our results demonstrate that by modifying a key copper-binding protein through altered gene expression, we see marked changes in the copper isotopic patterns in mice. [Preview Abstract] |
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