Open Access. Powered by Scholars. Published by Universities.®

Physical Sciences and Mathematics Commons™

Open Access. Powered by Scholars. Published by Universities.®

2013

Discipline
Institution
Keyword
Publication
Publication Type
File Type

Articles 91 - 120 of 8928

Full-Text Articles in Physical Sciences and Mathematics

Supernova Neutrino Nucleosynthesis Of Light Elements With Neutrino Oscillations, Takashi Yoshida, Toshitaka Kajino, Hidekazu Yokomakura, Keiichi Kimura, Akira Takamura, Dieter H. Hartmann Dec 2013

Supernova Neutrino Nucleosynthesis Of Light Elements With Neutrino Oscillations, Takashi Yoshida, Toshitaka Kajino, Hidekazu Yokomakura, Keiichi Kimura, Akira Takamura, Dieter H. Hartmann

Publications

Light element synthesis in supernovae through neutrino-nucleus interactions, i.e., the ν-process, is affected by neutrino oscillations in the supernova environment. There is a resonance of 13-mixing in the O/C layer, which increases the rates of charged-current ν-process reactions in the outer He-rich layer. The yields of 7Li and 11B increase by about a factor of 1.9 and 1.3, respectively, for a normal mass hierarchy and an adiabatic 13-mixing resonance, compared to those without neutrino oscillations. In the case of an inverted mass hierarchy and a non-adiabatic 13-mixing resonance, the increase in the 7Li and 11B yields is much smaller. Observations …

Go to article

Parallel Implementation Of Moving Averages On Rmesh, John Jenq Dec 2013

Parallel Implementation Of Moving Averages On Rmesh, John Jenq

Department of Computer Science Faculty Scholarship and Creative Works

Moving averages are important financial indicators. There are short term moving average and long term moving averages. The interaction of the short term moving averages and long term averages give analyst the good clues about the direction of future assets performance. In this paper, the computation of two popular moving averages are discussed. The n-day simple moving average treats all past n days' closing prices equally while the n-day exponential moving average assigns more weight to most recent day and least weight to lease recent day closing price when form the computation formula. Both methods can be done in O(logN) …

Go to article

Direct Coupling Of Photonic Modes And Surface Plasmon Polaritons Observed In 2-Photon Peem, Robert Campbell Word, Joseph Fitzgerald, Rolf Könenkamp Dec 2013

Direct Coupling Of Photonic Modes And Surface Plasmon Polaritons Observed In 2-Photon Peem, Robert Campbell Word, Joseph Fitzgerald, Rolf Könenkamp

Physics Faculty Publications and Presentations

We report the direct microscopic observation of optical energy transfer from guided photonic modes in an indium tin oxide (ITO) thin film to surface plasmon polaritons (SPP) at the surfaces of a single crystalline gold platelet. The photonic and SPP modes appear as an interference pattern in the photoelectron emission yield across the surface of the specimen. We explore the momentum match between the photonic and SPP modes in terms of simple waveguide theory and the three-layer slab model for bound SPP modes of thin metal films. We show that because the gold is thin (30- 40 nm), two SPP …

Go to article

Common Fundamental Domains For Lattices Of The Same Volume, Ashley Erwin Dec 2013

Common Fundamental Domains For Lattices Of The Same Volume, Ashley Erwin

Honors Program Theses and Projects

No abstract provided.

Go to article

Reduced Row Echelon Form And Non-Linear Approximation For Subspace Segmentation And High-Dimensional Data Clustering, Akram Aldroubi, Ali Sekmen Dec 2013

Reduced Row Echelon Form And Non-Linear Approximation For Subspace Segmentation And High-Dimensional Data Clustering, Akram Aldroubi, Ali Sekmen

Computer Science Faculty Research

Given a set of data W={w1,…,wN}∈RD drawn from a union of subspaces, we focus on determining a nonlinear model of the form U=⋃i∈ISi, where {Si⊂RD}i∈I is a set of subspaces, that is nearest to W. The model is then used to classify W into clusters. Our approach is based on the binary reduced row echelon form of data matrix, combined with an iterative scheme based on a non-linear approximation method. We prove that, in absence of noise, our approach can find the number of subspaces, their dimensions, and an orthonormal basis for each subspace Si. We provide a comprehensive analysis …

Go to article

Synthesis, Structural Variations And Trends In The Properties Of Unique Dinuclear And Polynuclear Complexes Of Bis(Pyrazolyl)Methane Ligands In Solid State And Solution, Andrea Eva Pascui Dec 2013

Synthesis, Structural Variations And Trends In The Properties Of Unique Dinuclear And Polynuclear Complexes Of Bis(Pyrazolyl)Methane Ligands In Solid State And Solution, Andrea Eva Pascui

Theses and Dissertations

The semi-rigid ligands, p-[CH(pz)2]2C6H4, Lp, m-[CH(pz)2]2C6H2, Lm, and m-[CH(3,5-Me2pz)2]2C6H4, Lm* (pz = pyrazolyl ring), link two bis(pyrazolyl)methane units into a single molecule by a rigid phenylene spacer and are used to study the structural variations and magnetic interactions in self-assembled first row, divalent transition metal complexes in polymeric, dinuclear and dinuclear metallacyclic settings. The formation of these architectures highly depend on the geometry of these ligands: anti, the …

Go to article

Weak Interaction Studies Ith 6He, A. Knecht, Z. T. Alexander, Y. Bagdasarova, T. M. Cope, B. G. Delbridge, X. Fléchard, A. García, R. Hong, E. Liénard, P. Mueller, O. Naviliat-Cuncic, A. S.C. Palmer, R. G.H. Robertson, D. W. Storm, H. E. Swanson, S. Utsuno, F. Wauters, William Williams, C. Wrede, D. W. Zumwalt Dec 2013

Weak Interaction Studies Ith 6He, A. Knecht, Z. T. Alexander, Y. Bagdasarova, T. M. Cope, B. G. Delbridge, X. Fléchard, A. García, R. Hong, E. Liénard, P. Mueller, O. Naviliat-Cuncic, A. S.C. Palmer, R. G.H. Robertson, D. W. Storm, H. E. Swanson, S. Utsuno, F. Wauters, William Williams, C. Wrede, D. W. Zumwalt

Physics: Faculty Publications

The 6He nucleus is an ideal candidate to study the weak interaction. To this end we have built a high-intensity source of 6He delivering ∼1010 atoms/s to experiments. Taking full advantage of that available intensity we have performed a high-precision measurement of the 6He half-life that directly probes the axial part of the nuclear Hamiltonian. Currently, we are preparing a measurement of the beta-neutrino angular correlation in 6He beta decay that will allow to search for new physics beyond the Standard Model in the form of tensor currents. © 2013 AIP Publishing LLC.

Go to article

The Role Of Defects In Interlayer Cation Exchange In Clay Minerals, Laura Cardon, Dr. Barry R. Bickmore Dec 2013

The Role Of Defects In Interlayer Cation Exchange In Clay Minerals, Laura Cardon, Dr. Barry R. Bickmore

Journal of Undergraduate Research

Clay minerals comprise a large portion of the abundant sediment that covers the earth’s surface. As such, they have a significant impact on society in regard to land development and also water and mineral resources. The purpose of this study was to help unravel the mysteries of clay mineral properties by focusing special attention on the effects of defects found in the clay mineral structure. These defects are believed to play a key role in the exchange of, oftentimes toxic, interlayer cations in the clay mineral. Better understanding of this exchange would lead to better water management and aid us …

Go to article

Modeling Fecal Bacteria In Oregon Coastal Streams Using Spatially Explicit Watershed Characteristics, Paul Bryce Pettus Dec 2013

Modeling Fecal Bacteria In Oregon Coastal Streams Using Spatially Explicit Watershed Characteristics, Paul Bryce Pettus

Dissertations and Theses

Pathogens, such as Escherichia coli and fecal coliforms, are causing the majority of water quality impairments in U.S., making up ~87% of this grouping's violations. Predicting and characterizing source, transport processes, and microbial survival rates is extremely challenging, due to the dynamic nature of each of these components. This research built upon current analytical methods that are used as exploratory tools to predict pathogen indicator counts across regional scales. Using a series of non-parametric methodologies, with spatially explicit predictors, 6657 samples from non-estuarine lotic streams were analyzed to make generalized predictions of regional water quality. 532 frequently sampled sites in …

Go to article

How Does Climate Change Affect Coral Reefs?, Rachel Goff Dec 2013

How Does Climate Change Affect Coral Reefs?, Rachel Goff

Honors Theses

Climate change is a very real phenomenon that currently affects many of the ecosystems on Earth. Climate change occurs on a global scale and can be very detrimental to different environments. This occurrence can cause ocean warming, sea level rise, ocean acidification, and increased storm intensity. According to the EPA, the ocean's temperature has increased 1.4°F over the past century, and sea levels have risen 3.2 millimeters through the past 20 years. These changes to the oceans can greatly affect many of the ecosystems that reside in them. One of the main ecosystems that are being affected by climate change …

Go to article

Shark Community Structure In Winyah Bay, Sc, Keenen Fryman Dec 2013

Shark Community Structure In Winyah Bay, Sc, Keenen Fryman

Honors Theses

Assessments of local shark stocks are vital to understand population trends and their causes. Local data are incomplete despite many studies over many years. The first published study listed all of the shark species found off the coast of SC (Bearden 1965). Following Bearden's work, Schwartz (2003) used a 30 year data set to describe the elasmobranchs found in NC and SC. In 2004, a survey of coastal habitats in southeast NC helped to identify the nursery habitat for C. acronotus, C. brevipinna, C. limbatus, C. obscurus, C. plumbeus, M. canis, R. terraenovae, S. tiburo, and S. lewini (Thorpe et …

Go to article

Overview Of The Large-Scale Biosphere-Atmosphere Experiment In Amazonia Data Model Intercomparison Project (Lba-Dmip), Luis Gustavo Gonçalves De Gonçalves, Jordan S. Borak, Marcos Heil Costa, Scott R. Saleska, Ian Baker, Natalia Restrepo-Coupe, Michel Nobre Muza, Benjamin Poulter, Hans Verbeeck, Bradley O. Christoffersen Dec 2013

Overview Of The Large-Scale Biosphere-Atmosphere Experiment In Amazonia Data Model Intercomparison Project (Lba-Dmip), Luis Gustavo Gonçalves De Gonçalves, Jordan S. Borak, Marcos Heil Costa, Scott R. Saleska, Ian Baker, Natalia Restrepo-Coupe, Michel Nobre Muza, Benjamin Poulter, Hans Verbeeck, Bradley O. Christoffersen

School of Integrative Biological & Chemical Sciences Faculty Publications

A fundamental question connecting terrestrial ecology and global climate change is the sensitivity of key terrestrial biomes to climatic variability and change. The Amazon region is such a key biome: it contains unparalleled biological diversity, a globally significant store of organic carbon, and it is a potent engine driving global cycles of water and energy. The importance of understanding how land surface dynamics of the Amazon region respond to climatic variability and change is widely appreciated, but despite significant recent advances, large gaps in our understanding remain. Understanding of energy and carbon exchange between terrestrial ecosystems and the atmosphere can …

Go to article

What Drives The Seasonality Of Photosynthesis Across The Amazon Basin? A Cross-Site Analysis Of Eddy Flux Tower Measurements From The Brasil Flux Network, Natalia Restrepo-Coupe, Humberto R. Da Rocha, Lucy R. Hutyra, Alessandro C. Da Araujo, Laura S. Borma, Bradley O. Christoffersen, Osvaldo M.R. Cabral, Plinio B. De Camargo, Fernando L. Cardoso, Antonio C.Lola Da Costa Dec 2013

What Drives The Seasonality Of Photosynthesis Across The Amazon Basin? A Cross-Site Analysis Of Eddy Flux Tower Measurements From The Brasil Flux Network, Natalia Restrepo-Coupe, Humberto R. Da Rocha, Lucy R. Hutyra, Alessandro C. Da Araujo, Laura S. Borma, Bradley O. Christoffersen, Osvaldo M.R. Cabral, Plinio B. De Camargo, Fernando L. Cardoso, Antonio C.Lola Da Costa

School of Integrative Biological & Chemical Sciences Faculty Publications

We investigated the seasonal patterns of Amazonian forest photosynthetic activity, and the effects thereon of variations in climate and land-use, by integrating data from a network of ground-based eddy flux towers in Brazil established as part of the 'Large-Scale Biosphere Atmosphere Experiment in Amazonia' project. We found that degree of water limitation, as indicated by the seasonality of the ratio of sensible to latent heat flux (Bowen ratio) predicts seasonal patterns of photosynthesis. In equatorial Amazonian forests (5° N-5° S), water limitation is absent, and photosynthetic fluxes (or gross ecosystem productivity, GEP) exhibit high or increasing levels of photosynthetic activity …

Go to article

An Analysis Of The Application Of Best Management Practices In Collaborative Watershed Management To Community-Based Sustainable Development, Rebecca Holthaus Sappenfield Dec 2013

An Analysis Of The Application Of Best Management Practices In Collaborative Watershed Management To Community-Based Sustainable Development, Rebecca Holthaus Sappenfield

Masters Theses, 2010-2019

This research seeks to determine if BMPs from CWM can inform the broader concept of CBSD. In order to answer this question, I conduct a desk study, which involves an extensive review of the CWM literature in two areas: stakeholder participation and building trust among stakeholders. I then analyze my research to deduce BMPs for these areas of CWM. As part of this analysis, I also explore how effective environmental communication plays a fundamental role in achieving these BMPs. The culmination of this work is the production of guidelines of best practice for stakeholder participation and building trust among stakeholders …

Go to article

A Resilience Assessment Of The Ramla Valley System, Gozo, Mykel Fenech Dec 2013

A Resilience Assessment Of The Ramla Valley System, Gozo, Mykel Fenech

Masters Theses, 2010-2019

The investigation delves into the application of the resilience concept to the ecological and anthropogenic systems of Ramla Valley, Gozo. The Resilience Assessment, the first of its kind attempted in the Islands, takes a holistic approach to study a system by considering the various system components and related pressures. Components considered include agricultural, ecological, sediment (beaches and dunes) and landscape. Current governance impacting the system was also considered. Methods used in this study were based on guidelines provided by the Resilience Alliance and supported by data derived from previous studies, interviews with interested parties, on-site observations, and comparative studies of …

Go to article

Characterization Of Complexes Of 2,2-Cis [Rh2(N{C6h5}Coch3)4] With Nitriles., Megan Ketron Dec 2013

Characterization Of Complexes Of 2,2-Cis [Rh2(N{C6h5}Coch3)4] With Nitriles., Megan Ketron

Undergraduate Honors Theses

Complexes of 2,2-cis [Rh2(N{C6H5}COCH3)4] bound to benzonitrile, ortho-tolunitrile, and meta-tolunitrile were synthesized and characterized using X-ray crystallography, IR spectroscopy, and proton NMR. The crystal structures of 2,2-cis [Rh2(N{C6H5}COCH3)4]•2NCC6H5, 2,2-cis [Rh2(N{C6H5}COCH3)4]•2NC{2-CH3}C6H4, and 2,2-cis [Rh2(N{C6H5}COCH3)4]•2NC{3-CH3}C6H4 were solved using a Rigaku Mercury375R/M CCD XtaLab Mini Diffractometer. The 2,2-cis [Rh2(N{C6H5}COCH3)4]•2NCC6H5 complex had unit cell dimensions of a=10.2115(7) Å, b=9.9667(7) Å, c=21.367(2) Å, and β=100.971(7)° with a P21/n space group. The 2,2-cis [Rh2(N{C6H5}COCH3)4]•2NC{2-CH3}C6H4 complex had unit cell dimensions of a=10.3625(8) Å, b=10.0489(7) Å, c=21.611(2) Å, and β=100.868(7)° with a P21/n space group. The 2,2-cis [Rh2(N{C6H5}COCH3)4]•2NC{3-CH3}C6H4 complex had unit cell dimensions of a=10.849(3) Å, b=11.530(3) Å, …

Go to article

Glycosyl Thiocarbamates As New Building Blocks For Chemical Glycosylation, Sneha Chandrashekhar Ranade Dec 2013

Glycosyl Thiocarbamates As New Building Blocks For Chemical Glycosylation, Sneha Chandrashekhar Ranade

Dissertations

Having multiple functions in biological systems e.g. fertilization, blood group determination, cell growth; carbohydrates have remained attractive subjects for the study. They are also involved in various life threatening biological processes, such as viral and bacterial infections, tumor development, etc. Understanding of these involvements/interactions of carbohydrates in such critical processes is essential for the development of carbohydrate based vaccines and therapeutics. Although carbohydrates are present abundantly in nature, their isolation is cumbersome and low yielding, which is why, the synthesis of carbohydrate units has been of interest to many scientists. Efforts have been made to make these synthetic methods more …

Go to article

Characterization And Reaction Of An Analog Of The Anticancer Drug Oxaliplatin, Jonathan D. Hendrie Dec 2013

Characterization And Reaction Of An Analog Of The Anticancer Drug Oxaliplatin, Jonathan D. Hendrie

Mahurin Honors College Capstone Experience/Thesis Projects

Oxaliplatin is an anticancer drug that reacts with DNA, RNA, and proteins both in vitro and in vivo. Our research focuses on synthesizing analogs of oxaliplatin and understanding how bulky ligand groups affect reaction with amino acids. (R,R)-N,N’-dimethyl-1,2-diaminocyclohexane platinum(II) oxalate or Pt(Me2dach)(ox) varies from oxaliplatin or Pt(dach)(ox) in that it has one methyl group attached to each platinum coordinated nitrogen. Nuclear Magnetic Resonance (NMR) spectroscopy has shown that the reactions of N-Acetylmethionine (N-AcMet) with Pt(Me2dach)(ox) and Pt(dach)(ox) proceed at similar rates suggesting that the methyl groups of Pt(Me2dach)(ox) have little effect on the initial reaction. Whereas the reaction of Pt(dach)(ox) …

Go to article

Public Perception On The State Of Air Quality In Malta, Nikolas Cassar Dec 2013

Public Perception On The State Of Air Quality In Malta, Nikolas Cassar

Masters Theses, 2010-2019

Public perception on the state of air quality is an unclear and hazy concept whereby every individual has different opinions and views. In fact, the state of air quality is a major concern in many countries, including in Malta. This problem arises from the emissions of a number of pollutants to the atmosphere from a host of processes such as the combustion of fuel to generate electricity and the internal combustion engines to manoeuvre cars. Amongst these pollutants, there are benzene and nitrogen dioxide, which are very hazardous since they cause problems related to human health and contribute in the …

Go to article

Improving The Energy Efficiency Of Dehumidification Technology At A Large Facility In Florida, Brandon Willson Hoilett Dec 2013

Improving The Energy Efficiency Of Dehumidification Technology At A Large Facility In Florida, Brandon Willson Hoilett

Masters Theses, 2010-2019

This thesis examines energy use and management of twenty heat pipes used in dehumidification systems at a large (10,000+ acre) facility in Florida. Eleven of the twenty heat pipes use electric strip heaters that, when activated, consume 693.8 kW of electrical power from the grid. Solar photovoltaics, specifically a silicon monocrystalline cell with 22.5% efficiency, were considered as a means to provide an alternative energy source and opportunity for cost savings for 11 of the heat pipes (Sunpower, 2011). The remaining nine heat pipes use hot water heaters for which alternative energy sources were not considered. Data gathered and analyzed …

Go to article

Potential Energy Savings When Using Saline Water For Cooling Chillers In Malta, Mireille Micallef Dec 2013

Potential Energy Savings When Using Saline Water For Cooling Chillers In Malta, Mireille Micallef

Masters Theses, 2010-2019

Several cooling systems found in facilities on the coast of St. Julian’s were found to be making use of chillers whose condensers are cooled with saline water as opposed to air. The former practice is advantageous since it results in better chiller performance which can be explained through thermodynamic principles. The principle of operation of water cooled chillers is to reject heat from the condenser to saline groundwater obtained from boreholes through a heat exchanger. The higher temperature saline ground water is then rejected to the sea. Chillers cooled with saline groundwater are subject to the Borehole Drilling and Excavation …

Go to article

Physics 2710 – Example Exam Iii, David Peak Dec 2013

Physics 2710 – Example Exam Iii, David Peak

Exams

No abstract provided.

Go to article

Mid-Latiude Rayleigh-Mie-Raman Lidar For Observations From 15 To 120 Km, Vincent B. Wickwar, Leda Sox, Joshua P. Herron, Matthew T. Emerick Dec 2013

Mid-Latiude Rayleigh-Mie-Raman Lidar For Observations From 15 To 120 Km, Vincent B. Wickwar, Leda Sox, Joshua P. Herron, Matthew T. Emerick

Posters

Rayleigh lidar opened a portion of the atmosphere, from 30 to 90 km, to ground-based observations. Rayleigh-scatter observations were made at the Atmospheric Lidar Observatory (ALO) at Utah State University (USU) from 1993–2004 between 45 and 90 km. The lidar consisted of a 0.44-m diameter mirror, a frequency-doubled Nd:YAG laser opera'ng at 532-nm at 30- Hz at either 18- or 24-W, giving power- aperture products (PAPs) of 2.7- or 3.6- Wm2, respec'vely, and one detector channel. An example of what was accomplished with this system is shown as part of Fig. 1. The temperature climatology was based on ~5000 hours …

Go to article

Hydraulic Fracturing: Restoring Public Health And Safety As A Top Priority, Brian Barnes Dec 2013

Hydraulic Fracturing: Restoring Public Health And Safety As A Top Priority, Brian Barnes

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Hydraulic Fracturing: Restoring Public Health and Safety as a Top Priority

Go to article

Tar Sands, Americas Drug Of Choice, James Cope Dec 2013

Tar Sands, Americas Drug Of Choice, James Cope

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Tar Sands, Americas Drug of Choice

Go to article

Dirty Power, Or A Dirty Word?, Kyle Chapo Dec 2013

Dirty Power, Or A Dirty Word?, Kyle Chapo

Op-Eds from ENSC230 Energy and the Environment: Economics and Policies

Dirty Power, or a Dirty Word?

Go to article

Scenario Development And Analysis Of Freshwater Ecosystem Services Under Land Cover And Climate Change In The Tualatin And Yamhill River Basins, Oregon, Robert Wesley Hoyer Dec 2013

Scenario Development And Analysis Of Freshwater Ecosystem Services Under Land Cover And Climate Change In The Tualatin And Yamhill River Basins, Oregon, Robert Wesley Hoyer

Dissertations and Theses

Humans make decisions within ecosystems to enhance their well-being, but choices can lead to unintended consequences. The ecosystem services (ES) approach supports decision-making that considers all environmental goods and services. Many challenges remain in the implementation of the ES approach like how specific ES vary through space and time. We address this research problem using the Tualatin and Yamhill river basins in northwestern Oregon as a study area. Freshwater ES are quantified and mapped with the spatially-explicit ES modeling tool, Integrated Valuation of Ecosystem Services and Tradeoffs (InVEST). In chapter II, we develop a simple urban land cover change modeling …

Go to article

Identification And Characterization Of Fine Particulate Matter Hot Spots On An Urban Arterial Corridor Integrating Probe Vehicle, Traffic And Land Use Data, Katherine Eleanor Bell Dec 2013

Identification And Characterization Of Fine Particulate Matter Hot Spots On An Urban Arterial Corridor Integrating Probe Vehicle, Traffic And Land Use Data, Katherine Eleanor Bell

Dissertations and Theses

The purpose of this study is to explore the use of integrated probe vehicle, traffic and land use data to identify and characterize fine particulate matter (PM[subscript 2.5]) hot spot locations on urban arterial corridors. In addition, a preliminary analysis is conducted to consider volatile organic compound (VOC) hot spot locations. A pollutant hot spot is defined as a location on a corridor in which the mean pollutant concentrations are consistently above the 85th percentile of pollutant concentrations when compared to all locations along the corridor. In order to collect data for this study, an electric vehicle was equipped with …

Go to article

Atomic Data For S Ii—Toward Better Diagnostics Of Chemical Evolution In High-Redshift Galaxies, Romas Kisielius, Varsha P. Kulkarni, Gary J. Ferland, Pavel Bogdanovich, Matt L. Lykins Dec 2013

Atomic Data For S Ii—Toward Better Diagnostics Of Chemical Evolution In High-Redshift Galaxies, Romas Kisielius, Varsha P. Kulkarni, Gary J. Ferland, Pavel Bogdanovich, Matt L. Lykins

Physics and Astronomy Faculty Publications

Absorption-line spectroscopy is a powerful tool used to estimate element abundances in both the nearby and distant universe. The accuracy of the abundances thus derived is naturally limited by the accuracy of the atomic data assumed for the spectral lines. We have recently started a project to perform new extensive atomic data calculations used for optical/UV spectral lines in the plasma modeling code Cloudy using state of the art quantal calculations. Here, we demonstrate our approach by focussing on S II, an ion used to estimate metallicities for Milky Way interstellar clouds as well as distant damped Lyman-alpha (DLA) and …

Go to article

Mechanistic Studies Of Bimolecular Electron Transfer Self-Exchange Rates Of Ruthenium Ammine Pyridyl Complexes Measured By Nmr Line Broadening Techniques, Yishun Qin Dec 2013

Mechanistic Studies Of Bimolecular Electron Transfer Self-Exchange Rates Of Ruthenium Ammine Pyridyl Complexes Measured By Nmr Line Broadening Techniques, Yishun Qin

Master's Theses

The electron transfer (ET) self-exchange rates on a series of complexes of (NH3)5RuII/III L2+/3+ in D2O (where L is a substituted pyridyl ligand) were investigated by dynamic NMR measurements. Significant rate enhancement was observed for the cases of L = 3-phenylpyridine and 4-phenylpridine due to possible π-π stacking between Phpy ligands. These observations matche well with recent stopped-flow work by Mehmood on a similar set of related pseudo-self exchange reactions. Kinetics of the (NH3)5RuII/III (3-trifluoromethylpyridine)2+/3+ self-exchange reactions with addition of various simple/complex salts and hexacyano salts …

Go to article

First Prev Next Last