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Articles 1 - 30 of 254
Full-Text Articles in Physical Sciences and Mathematics
C.V. - Wojciech Budzianowski, Wojciech M. Budzianowski
Renewable Energy And Sustainable Development (Resd) Group, Wojciech M. Budzianowski
Renewable Energy And Sustainable Development (Resd) Group, Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Procesy Cieplne I Aparaty (Lab), Wojciech M. Budzianowski
Inżynieria Chemiczna Lab., Wojciech M. Budzianowski
Creep Properties Of Local Variety Of Lime (Lemun Tsami) Under Quasi-Static Loading, Dakogol F. A, Obetta, S. E, Ijabo O. .J
Creep Properties Of Local Variety Of Lime (Lemun Tsami) Under Quasi-Static Loading, Dakogol F. A, Obetta, S. E, Ijabo O. .J
Innovative Research Publications IRP India
Local variety of lime (Lemun tsami) was subjected to quasi-static compressive loading using Instron Universal Testing Machine at three levels of time after harvest; freshly harvested, one and two weeks after harvest. Creep parameters were determined by fitting the experimental data to the Burger’s Model and the obtained model equation for freshly harvested was: 𝑱 𝒕 = 𝟏. 𝟖𝟒𝟑 + 𝟐. 𝟓𝟗[ 1 – е (-t/2.933) ]+ 𝒕 𝟏𝟏𝟔𝟎.𝟎𝟗𝟑 , R 2 = 0.98. The instantaneous creep compliance (Jo) was; 1.843, 3.137 and 4.116 1/MPa for freshly harvested, one and two weeks after harvest respectively while the corresponding instantaneous elasticity …
Fabrication Of Sno2/Reduced Graphene Oxide Nanocomposite Films For Sensing No2 Gas At Room-Temperature, Innovative Research Publications Irp India, Pi-Guey Su, Ching-Hsuan Wei A, Wei-Luen Shiu
Fabrication Of Sno2/Reduced Graphene Oxide Nanocomposite Films For Sensing No2 Gas At Room-Temperature, Innovative Research Publications Irp India, Pi-Guey Su, Ching-Hsuan Wei A, Wei-Luen Shiu
Innovative Research Publications IRP India
One-pot polyol process was combined with metal organic decomposition (MOD) method to fabricate a room-temperature NO2 gas sensor based on tin dioxide and reduced graphene oxide (SO2/RGO) nanocomposite films. X-ray diffractometry (XRD) and scanning electron microscopy (SEM) were used to analyze the structure and morphology of the fabricated films. The electrical and NO2 gas-sensing properties of SnO2 to which various amounts of RGO were added were measured in detail as a function of concentration of NO2 gas at room temperature, to elucidate the contribution of RGO to the NO2 gas-sensing capacity. The sensor that was based on a nanocomposite film …
Application Of Colloidal Gas Aphron Suspensions Produced From Sapindus Mukorossi For Arsenic Removal From Contaminated Soil, Soumyadeep Mukhopadhyay Dr, Sumona Mukherjee Ms, Mohd Ali Hashim Dr, Bhaskar Sen Gupta Dr
Application Of Colloidal Gas Aphron Suspensions Produced From Sapindus Mukorossi For Arsenic Removal From Contaminated Soil, Soumyadeep Mukhopadhyay Dr, Sumona Mukherjee Ms, Mohd Ali Hashim Dr, Bhaskar Sen Gupta Dr
Soumyadeep Mukhopadhyay Dr
Colloidal gas aphron dispersions (CGAs) can be described as a system of microbubbles suspended homogenously in a liquid matrix. This work examines the performance of CGAs in comparison to surfactant solutions for washing low levels of arsenic from an iron rich soil. Sodium Dodecyl Sulfate (SDS) and saponin, a biodegradable surfactant, obtained from Sapindus mukorossi or soapnut fruit were used for generating CGAs and solutions for soil washing. Column washing experiments were performed in down-flow and up flow modes at a soil pH of 5 and 6 using varying concentration of SDS and soapnut solutions as well as CGAs. Soapnut …
Inżynieria Chemiczna Ćw., Wojciech M. Budzianowski
Tematyka Prac Doktorskich, Wojciech M. Budzianowski
Tematyka Prac Doktorskich, Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Synthesis, Characterization, Antimicrobial Activity And Applications Of Polyanilineti(Iv)Arsenophosphate Adsorbent For The Analysis Of Organic And Inorganic Pollutants, Mohammad Oves
Mohammad Oves
No abstract provided.
A Solution-Based Temperature Sensor Using The Organic Compound Cutspc, Shahino Mah Abdullah
A Solution-Based Temperature Sensor Using The Organic Compound Cutspc, Shahino Mah Abdullah
Shahino Mah Abdullah
An electrochemical cell using an organic compound, copper (II) phthalocyanine-tetrasulfonic acid tetrasodium salt (CuTsPc,) has been fabricated and investigated as a solution-based temperature sensor. The capacitance and resistance of the ITO/CuTsPc solution/ITO chemical cell has been characterized as a function of temperature in the temperature range of 25–80 °C. A linear response with minimal hysteresis is observed. The fabricated temperature sensor has shown high consistency and sensitive response towards a specific range of temperature values.
Ligand-Receptor Interactions For Supramolecular Disassembly With Applications In Screening And Drug Delivery, Diego F. Amado Torres
Ligand-Receptor Interactions For Supramolecular Disassembly With Applications In Screening And Drug Delivery, Diego F. Amado Torres
Diego Amado Torres
Proteins have the capacity to bind specific sets of compounds known as ligands, these are small molecules with a recurrent theme in their molecular design that is a characteristic exploited here to (i) identify particular affinities of small molecules for proteins with the aim of using them as ligands, inhibitors, or targeting moieties in more complex systems by means of a methodology that screens small molecules based on protein affinity; (ii) decorate a self-assembling supramolecular system at different positions, making it responsive to a complementary protein with the aim of exploring differences in disassembly and sensitivity of the release of …
Non-Isothermal Reduction Of Silica-Supported Nickel Catalyst Precursors In Hydrogenation Atmosphere: A Kinetic Study And Statistical Interpretation, Zeljko D. Cupic
Non-Isothermal Reduction Of Silica-Supported Nickel Catalyst Precursors In Hydrogenation Atmosphere: A Kinetic Study And Statistical Interpretation, Zeljko D. Cupic
Zeljko D Cupic
No abstract provided.
Selection And Phenotypic Characterization Of A Core Collection Of Brachypodium Distachyon Inbred Lines, Ludmilla Tyler, Johnathan U. Fangel, Alexandra D. Fagerström, Michael A. Steinwand, Ted K. Raab, William Gt Willats, John P. Vogel
Selection And Phenotypic Characterization Of A Core Collection Of Brachypodium Distachyon Inbred Lines, Ludmilla Tyler, Johnathan U. Fangel, Alexandra D. Fagerström, Michael A. Steinwand, Ted K. Raab, William Gt Willats, John P. Vogel
Ted K. Raab
The model grass Brachypodium distachyon is increasingly used to study various aspects of grass biology. A large and genotypically diverse collection of B. distachyon germplasm has been assembled by the research community. The natural variation in this collection can serve as a powerful experimental tool for many areas of inquiry, including investigating biomass traits. We surveyed the phenotypic diversity in a large collection of inbred lines and then selected a core collection of lines for more detailed analysis with an emphasis on traits relevant to the use of grasses as biofuel and grain crops. Phenotypic characters examined included plant height, …
Extraction Of Dibenzothiophene From N-Dodecane Using Ionic Liquids, M. Zulhaziman M. Salleh
Extraction Of Dibenzothiophene From N-Dodecane Using Ionic Liquids, M. Zulhaziman M. Salleh
Zulhaziman Salleh
Deep desulfurization of fuels has attracted lot of attention from growing number of researchers due to more stringent regulations imposed on sulfur content. There is a great demand to comply the regulation in current technology (hydrodesulfurization) because it requires high pressure, high temperature and high hydrogen consumption. Furthermore, aromatic sulfur compounds are also inefficient to be removed in current technology. Ionic Liquids (ILs) as class of green solvent actually plays important role as a promising alternative for desulfurization of fuels. This study focuses on the selection of potential ILs for extraction of aromatic sulfur compound involving the effect of higher …
Performance Evaluation Of Two-Stage Electrokinetic Washing As Soil Remediation Method For Lead Removal Using Different Wash Solutions, Yee Sern Ng, Bhaskar Sen Gupta, Mohd Ali Hashim
Performance Evaluation Of Two-Stage Electrokinetic Washing As Soil Remediation Method For Lead Removal Using Different Wash Solutions, Yee Sern Ng, Bhaskar Sen Gupta, Mohd Ali Hashim
Ng Yee-Sern
The study explores the application of a two-stage electrokinetic washing system on remediation of lead (Pb) contaminated soil. The process involved an initial soil washing, followed by an electrokinetic process. The use of electrokinetic process in soil washing not only provided additional driving force for transporting the desorbed Pb away from the soil but also reduced the high usage of wash solution. In this study, the effect of NaNO3, HNO3, citric acid and EDTA as wash solutions on two-stage electrokinetic washing system were evaluated. The results revealed that a two-stage electrokinetic washing process enhanced Pb removal efficiency by 2.52-9.08% and …
Termodynamika Procesowa I Techniczna Lab., Wojciech M. Budzianowski
Termodynamika Procesowa I Techniczna Lab., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Tematyka Prac Dyplomowych Dla Studentów Wydziału Mechaniczno-Energetycznego Pwr., Wojciech M. Budzianowski
Tematyka Prac Dyplomowych Dla Studentów Wydziału Mechaniczno-Energetycznego Pwr., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Tematyka Prac Dyplomowych Dla Studentów Wydziału Chemicznego Pwr., Wojciech M. Budzianowski
Tematyka Prac Dyplomowych Dla Studentów Wydziału Chemicznego Pwr., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Mechanika Płynów Lab., Wojciech M. Budzianowski
Mechanika Płynów Lab., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
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.
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 …