Open Access. Powered by Scholars. Published by Universities.®
Physical Sciences and Mathematics Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Astrochemistry (3)
- ISM: molecules (3)
- Molecular data (3)
- Publications (3)
- Radio lines: ISM (3)
-
- ISM: individual objects (Horsehead nebula) (2)
- ISM: lines and bands (2)
- Polyvinylpyrrolidone (2)
- Scholarly Presentations (Powerpoint Files) (2)
- Allelochemicals (1)
- Allelopathy -- Research Methods (1)
- Ammonia leaching (1)
- Anions (1)
- Antimicrobial activity (1)
- Antimicrobial activity of copper oxide nanoparticles (1)
- Article (1)
- Bray-Liebhafsky (1)
- CO2 separation (1)
- Carbonic anhydrase (1)
- Caron process (1)
- Chemistry (1)
- Cobalt (1)
- Copper oxide (1)
- Coupled cluster theory (1)
- Crime Prevention; Theft; Property Marking; Theft‐chain‐cycle; Supply Chain; Burglary; Drugs (1)
- Criminology, security science (1)
- CuO (1)
- CuO nanosheets (1)
- Dipole-bound states (1)
- Electronically excited states (1)
- Publication
- File Type
Articles 1 - 18 of 18
Full-Text Articles in Physical Sciences and Mathematics
Third-Order Nonlinear Optical Properties Of Chemically Synthesized Copper Oxide Nanosheets, Mahdi Shahmiri
Third-Order Nonlinear Optical Properties Of Chemically Synthesized Copper Oxide Nanosheets, Mahdi Shahmiri
mahdi shahmiri
Copper oxide (CuO) nanosheets were obtained by a quick-precipitation method using Cu(NO3)2 and NaOH in the presence of polyvinylpyrrolidone (PVP). Different sizes of CuO nanosheets were achieved by varying the PVP concentration. The crystal structure, morphology, and optical properties of the CuO nanosheets were characterized by X-ray diffraction, transmission electron microscopy, and diffuse reflectance spectroscopy. Higher PVP concentrations produced CuO nanosheets with enhanced crystalline structure, reduced particle size, and enlarged band gap. Nonlinear optical characteristics were examined by the Z-scan technique using a blue continuous wave laser beam operated at 405 nm. Increased PVP concentration from 0.5 wt% to 5 …
Preparation Of Pvp-Coated Copper Oxide Nanosheets As Antibacterial And Antifungal Agents, Mahdi Shahmiri
Preparation Of Pvp-Coated Copper Oxide Nanosheets As Antibacterial And Antifungal Agents, Mahdi Shahmiri
mahdi shahmiri
Copper oxide (CuO) nanosheets synthesized in polyvinylpyrrolidone (PVP) were characterized with respect to antimicrobial activity by quick precipitation method. Different sizes and shapes of CuO nanosheets were obtained by simple variations of PVP concentrations. The x-ray diffraction results revealed the formation of pure-phase CuO with monoclinic structure. Transmission electron microscopy analysis showed that the average ratio of length to width of these nanosheets increased with increasing PVP concentrations. Due to the quantum size effect, CuO nanosheets exhibit a blue shift in the ultraviolet-visible spectra. Field emission scanning electron microscopy results showed that as the concentration of PVP increased, well-defined morphologies …
Synthesis And Anti-Oxidant Activity Of Phenyl Propanoid Glycoside Analogs, Jennifer L. Koviach-Cote, Jennifer Brown, Joanna Mangar
Synthesis And Anti-Oxidant Activity Of Phenyl Propanoid Glycoside Analogs, Jennifer L. Koviach-Cote, Jennifer Brown, Joanna Mangar
Jennifer L. Koviach-Cote
No abstract provided.
Synthesis, Physicochemical Properties, And In Vitro Antibacterial Screening Of Palladium(Ii) Complexes Derived From Thiosemicarbazone, Mohammad Oves
Synthesis, Physicochemical Properties, And In Vitro Antibacterial Screening Of Palladium(Ii) Complexes Derived From Thiosemicarbazone, Mohammad Oves
Mohammad Oves
No abstract provided.
Soil Chemistry Response To Wollastonite (Casio3) Addition At Hubbard Brook, Chris E. Johnson
Soil Chemistry Response To Wollastonite (Casio3) Addition At Hubbard Brook, Chris E. Johnson
Chris E Johnson
No abstract provided.
Evidence Does Not Support A Role For Gallic Acid In Phragmites Australis Invasion Success, Jeffrey D. Weidenhamer, Mei Li, Joshua Allman, Robert G. Bergosh, Mason Posner
Evidence Does Not Support A Role For Gallic Acid In Phragmites Australis Invasion Success, Jeffrey D. Weidenhamer, Mei Li, Joshua Allman, Robert G. Bergosh, Mason Posner
Jeffrey D. Weidenhamer
Gallic acid has been reported to be responsible for the invasive success of nonnative genotypes of Phragmites australis in North America. We have been unable to confirm previous reports of persistent high concentrations of gallic acid in the rhizosphere of invasive P. australis, and of high concentrations of gallic acid and gallotannins in P. australis rhizomes. The half-life of gallic acid in nonsterile P. australis soil was measured by aqueous extraction of soils and found to be less than 1 day at added concentrations up to 10,000 mu g g(-1). Furthermore, extraction of P. australis soil collected in North Carolina …
Travelling In Cuba, Fathi Habashi
Travelling In Cuba, Fathi Habashi
Fathi Habashi
Contact with Cuban scientists was established in 1986 when two researchers from Centro de Investigaciones para Industria Minero Metalurgica in Havana visited Laval University to get acquainted with research activities in the area of extractive metallurgy. This was followed in early 1987 by two more researchers from the same centre. Invitations were then received in late 1987, 1989, and 2008 to visit the nickel refineries in Cuba and to hold seminars at the University of Havana. The present report outlines these activities.
High- Accuracy Quartic Force Field Calculations For The Spectroscopic Constants And Vibrational Frequencies Of 11A′ L-C3H-: A Possible Link To Lines Observed In The Horsehead Nebula Pdr, Ryan C. Fortenberry, Xinchuan Huang, T. D. Crawford, Timothy J. Lee
High- Accuracy Quartic Force Field Calculations For The Spectroscopic Constants And Vibrational Frequencies Of 11A′ L-C3H-: A Possible Link To Lines Observed In The Horsehead Nebula Pdr, Ryan C. Fortenberry, Xinchuan Huang, T. D. Crawford, Timothy J. Lee
Ryan C. Fortenberry
It has been shown that rotational lines observed in the Horsehead nebula photodissociation region (PDR) are probably not caused by l-C3H+, as was originally suggested. In the search for viable alternative candidate carriers, quartic force fields are employed here to provide highly accurate rotational constants, as well as fundamental vibrational frequencies, for another candidate carrier: 11 A' C3H–. The ab initio computed spectroscopic constants provided in this work are, compared to those necessary to define the observed lines, as accurate as the computed spectroscopic constants for many of the known interstellar …
Spectroscopic Constants And Vibrational Frequencies For L-C3H+ And Isotopologues From HighlyAccurate Quartic Force Fields: The Detection Of L-C3H+ In The Horsehead Nebula Pdr Questione, Xinchuan Huang, Ryan C. Fortenberry, Timothy J. Lee
Spectroscopic Constants And Vibrational Frequencies For L-C3H+ And Isotopologues From HighlyAccurate Quartic Force Fields: The Detection Of L-C3H+ In The Horsehead Nebula Pdr Questione, Xinchuan Huang, Ryan C. Fortenberry, Timothy J. Lee
Ryan C. Fortenberry
Very recently, molecular rotational transitions observed in the photon-dominated region of the Horsehead nebula have been attributed to l-C3H+. In an effort to corroborate this finding, we employed state-of-the-art and proven high-accuracy quantum chemical techniques to compute spectroscopic constants for this cation and its isotopologues. Even though the B rotational constant from the fit of the observed spectrum and our computations agree to within 20 MHz, a typical level of accuracy, the D rotational constant differs by more than 40%, while the H rotational constant differs by three orders of magnitude. With the likely errors in …
Tourbillion In The Phase Space Of The Bray-Liebhafsky Nonlinear Oscillatory Reaction And Related Multiple-Time-Scale Model, Zeljko D. Cupic
Tourbillion In The Phase Space Of The Bray-Liebhafsky Nonlinear Oscillatory Reaction And Related Multiple-Time-Scale Model, Zeljko D. Cupic
Zeljko D Cupic
The mixed-mode dynamical states found experimentally in the concentration phase space of the iodate catalyzed hydrogen peroxide decomposition (The Bray-Liebhafsky oscillatory reaction) are discussed theoretically in a related multiple-time-scale model, from the viewpoint of tourbillion. With aim to explain the mixed-mode oscillations obtained by numerical simulations of the various dynamical states of a model for the Bray-Liebhafsky reaction under CSTR conditions, the folded singularity points on the critical manifold of the full system and Andronov-Hopf bifurcation of the fast subsystem are calculated. The interaction between those singularities causes occurrence of tourbillion structure.
Synthesis And Characterization Of Cuo Nanosheets In Polyvinylpyrrolidone By Quick Precipitation Method, Mahdi Shahmiri
Synthesis And Characterization Of Cuo Nanosheets In Polyvinylpyrrolidone By Quick Precipitation Method, Mahdi Shahmiri
mahdi shahmiri
In this project, CuO nanosheets were grown successfully in polyvinylpyrrolidone (PVP) by a simple and quick chemical method in the absence of templates. Copper nitrate, PVP and sodium hydroxide were used as copper precursor, stabilizer and accelerator, respectively. The products were characterized by X-ray diffraction (XRD), UV–vis spectroscopy, field emission scanning electron microscopy (FE-SEM), energy dispersive analysis of X-rays (EDAX), transmission electron microscopy (TEM) and Fourier transform infrared (FT-IR) spectroscopy. The result of the XRD and EDAX confirmed the formation of pure single-phase CuO. Generation of the CuO nanosheets and nanorods were confirmed by UV–visible spectra. FE-SEM depicted that layered …
59 Articles, Fathi Habashi
59 Articles, Fathi Habashi
Fathi Habashi
Metal ions play an essential role in the functioning of all biological systems. They interact with charged and polar groups of all biopolymers. The study of structural and functional properties of metal binding proteins is an important area of modern physical and chemical biology. Metal cations and metal binding proteins are involved in all crucial cellular activities. Many pathological conditions are correlated with abnormal metal metabolism. Encyclopedia of Metalloproteins is a key resource that provides basic, accessible, and comprehensible information about this expanding field.
Mechaniczny Rozdział Faz Proj., Wojciech M. Budzianowski
Mechaniczny Rozdział Faz Proj., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Challenges And Prospects Of Processes Utilising Carbonic Anhydrase For Co2 Separation, Patrycja Szeligiewicz, Wojciech M. Budzianowski
Challenges And Prospects Of Processes Utilising Carbonic Anhydrase For Co2 Separation, Patrycja Szeligiewicz, Wojciech M. Budzianowski
Wojciech Budzianowski
This article provides an analysis of processes for separation CO2 by using carbonic anhydrase enzyme with particular emphasis on reactive-membrane solutions. Three available processes are characterised. Main challenges and prospects are given. It is found that in view of numerous challenges practical applications of these processes will be difficult in near future. Further research is therefore needed for improving existing processes through finding methods for eliminating their main drawbacks such as short lifetime of carbonic anhydrase or low resistance of reactive membrane systems to impurities contained in flue gases from power plants.
Breaking The Theft-Chain-Cycle: Property Marking As A Defensive Tool, William J. Bailey, David J. Brooks
Breaking The Theft-Chain-Cycle: Property Marking As A Defensive Tool, William J. Bailey, David J. Brooks
Bill Bailey
The theft of property and its associated impact effects many parts of society. For example, a considerable amount of resources are expended in trying to reduce property theft, as such crime engenders both a financial and emotional impact (Grabosky, 1995, p. 1) on those involved. Factors such as fear of crime, increased insurance premiums and victimization are all outcomes of property crime. Much of the past research has focused on the mitigation of such crimes, collectively termed as ‘crime prevention’. Crime prevention are “any actions designed to reduce the actual level of crime and/or the perceived crime” (S.P. Lab, 2010, …
Insights Into Forest Soil Carbon Dynamics From Nuclear Magnetic Resonance Spectroscopy, Chris E. Johnson
Insights Into Forest Soil Carbon Dynamics From Nuclear Magnetic Resonance Spectroscopy, Chris E. Johnson
Chris E Johnson
No abstract provided.
Singlet Excited States Of Anions With Higher Main Group Elements, Ryan C. Fortenberry
Singlet Excited States Of Anions With Higher Main Group Elements, Ryan C. Fortenberry
Ryan C. Fortenberry
Previous studies have shown that dipole-bound excited states exist for certain small anions. However, valence excited states have been reported for some closed-shell anions, but those with singlet valence excited states have, thus far, contained a single silicon atom. This work uses high-level coupled cluster theory previously shown to reproduce excited state energies to better than 0.1 eV compared with experiment in order to examine the electronic excited state properties of anions containing silicon and other higher main group atoms as well as their first row analogues. Of the 14 anions involved in this study, 9 possess bound excited states …
Theoretical Electronic And Rovibrational Studies For Anions Of Interest To The Dibs, Ryan C. Fortenberry
Theoretical Electronic And Rovibrational Studies For Anions Of Interest To The Dibs, Ryan C. Fortenberry
Ryan C. Fortenberry
The dipole-bound excited state of the methylene nitrile anion (CH2CN−) has been suggested as a candidate carrier for a diffuse interstellar band (DIB) at 803.8 nm. Its corresponding radical has been detected in the interstellar medium (ISM), making the existence for the anion possible. This work applies state-of-the-art ab initio methods such as coupled cluster theory to reproduce accurately the electronic excitations for CH2CN− and the similar methylene enolate anion, CH2CHO−. This same approach has been employed to indicate that 19 other anions may possess electronically excited states, five of which are valence in nature. Concurrently, in order to assist …