Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- University of Nebraska - Lincoln (2443)
- Singapore Management University (2310)
- Brigham Young University (1907)
- TÜBİTAK (1319)
- Wright State University (1051)
-
- Old Dominion University (971)
- Missouri University of Science and Technology (873)
- University of Kentucky (787)
- Utah State University (770)
- Portland State University (749)
- University of Nevada, Las Vegas (714)
- Edith Cowan University (658)
- University of South Florida (648)
- Montana Tech Library (619)
- City University of New York (CUNY) (599)
- Technological University Dublin (566)
- University of Central Florida (561)
- Air Force Institute of Technology (539)
- Louisiana State University (531)
- Embry-Riddle Aeronautical University (492)
- University of Arkansas, Fayetteville (484)
- Nova Southeastern University (459)
- Chulalongkorn University (456)
- University of Texas Rio Grande Valley (446)
- San Jose State University (374)
- California Polytechnic State University, San Luis Obispo (369)
- Western Kentucky University (367)
- Claremont Colleges (349)
- New Jersey Institute of Technology (348)
- Purdue University (348)
- Keyword
-
- Machine learning (530)
- Artificial intelligence (363)
- Sustainability (331)
- Social media (290)
- Machine Learning (286)
-
- Climate change (279)
- Cybersecurity (243)
- Deep learning (234)
- Education (230)
- Computer Science (207)
- Security (207)
- Chemistry (194)
- Mathematics (188)
- Artificial Intelligence (184)
- Privacy (183)
- Twitter (180)
- Priority Soils (177)
- Nanoparticles (168)
- Natural language processing (167)
- Computer science (161)
- COVID-19 (158)
- Statistics (144)
- Technology (142)
- United States (137)
- Environment (135)
- Groundwater (129)
- AI (123)
- Applied sciences (121)
- Water quality (120)
- Natural Language Processing (116)
- Publication Year
- Publication
-
- Theses and Dissertations (3164)
- Research Collection School Of Computing and Information Systems (2058)
- Electronic Theses and Dissertations (747)
- Turkish Journal of Chemistry (651)
- Silver Bow Creek/Butte Area Superfund Site (580)
-
- Kno.e.sis Publications (540)
- Dissertations (486)
- Faculty Publications (427)
- Chulalongkorn University Theses and Dissertations (Chula ETD) (395)
- USF Tampa Graduate Theses and Dissertations (378)
- Turkish Journal of Electrical Engineering and Computer Sciences (349)
- Walden Dissertations and Doctoral Studies (329)
- Masters Theses (326)
- Theses (318)
- LSU New Orleans Theses and Dissertations (312)
- LSU Doctoral Dissertations (305)
- Articles (289)
- All Works (271)
- UNLV Theses, Dissertations, Professional Papers, and Capstones (269)
- Journal of Electrochemistry (265)
- Open Access Theses & Dissertations (265)
- CCAC Theses and Dissertations (245)
- Coal Geology & Exploration (242)
- Graduate Theses and Dissertations (230)
- Dissertations and Theses (227)
- Honors Theses (219)
- Master's Projects (210)
- Publications (210)
- IGC Proceedings (1977-2023) (206)
- Doctoral Dissertations (197)
- Publication Type
Articles 38161 - 38190 of 41042
Full-Text Articles in Entire DC Network
Influence Of Medium On Generation Of Localized Charges In Beo By The Exposure Of The Electrical Discharge In Air And Oxygen, M.M. Aliev
Turkish Journal of Physics
The EPR-method is used to investigate the regularity of the formation of paramagnetic $ F^+$- and $ V^-$ centers (PC) in BeO which are generated by barrier electrical discharge (ED) in air and oxygen under reduced pressure. It was determined that, at different powers of discharge or parameters E/P, the maximums of kinetic curves of PC- accumulation in oxygen in comparison with air plasma forming medium are changed with resspect to both their value and position, depending on the interaction of oxygen atoms and ions $O, O^+, O^-, O^+_2, O^-_2,\ldots)$ with BeO surface. These exposures resulted in decreasing rate of …
Population Dynamics: The Foundation Of Wildlife Damage Management For The 21st Century, Richard A. Dolbeer
Population Dynamics: The Foundation Of Wildlife Damage Management For The 21st Century, Richard A. Dolbeer
Vertebrate Pest Conference Proceedings: 18th (1998)
To justify and defend lethal or reproductive control programs to solve vertebrate pest problems, wildlife biologists must have a sound understanding of the population status and dynamics of the problem species. Models are essential to project how populations will respond to proposed management actions, providing a scientific foundation to counter the emotional debates that often arise. Four population models (PM1 to PM4) for predicting population responses are described. PM1 and PM2 explore the relative efficacy of reproductive and lethal control for vertebrate species over 10-year intervals. PM3 simulates population responses to actual management actions through 10-year intervals. PM4 simulates population …
Estimating Vegetation Structural Effects On Carbon Uptake Using Satellite Data Fusion And Inverse Modeling, Gregory P. Asner, C. Ann Bateson, Jeffrey L. Privette, Nazmi El Saleous, Carol A. Wessman
Estimating Vegetation Structural Effects On Carbon Uptake Using Satellite Data Fusion And Inverse Modeling, Gregory P. Asner, C. Ann Bateson, Jeffrey L. Privette, Nazmi El Saleous, Carol A. Wessman
United States National Aeronautics and Space Administration: Publications
Regional analyses of biogeochemical processes can benefit significantly from observational information on land cover, vegetation structure (e.g., leaf area index), and biophysical properties such as fractional PAR absorption. Few remote sensing efforts have provided a suite of plant attributes needed to link vegetation structure to ecosystem function at high spatial resolution. In arid and semiarid ecosystems (e.g., savannas), high spatial heterogeneity of land cover results in significant functional interaction between dominant vegetation types, requiring new approaches to resolve their structural characteristics for regional-scale biogeochemical research. We developed and tested a satellite data fusion and radiative transfer inverse modeling approach to …
1998-1999 Nova Southeastern University Center For Undergraduate Studies Catalog, Nova Southeastern University
1998-1999 Nova Southeastern University Center For Undergraduate Studies Catalog, Nova Southeastern University
Undergraduate Programs Course Catalogs
No abstract provided.
Fall 1998, Nsu Oceanographic Center
Investing In Tomorrow's Teachers: The Integral Role Of The Two-Year College In The Science And Mathematics Preparation Of Prospective Teachers: Steering Committee Report To The National Science Foundation
Journal of Mathematics and Science: Collaborative Explorations
No abstract provided.
Clow Point Winter Recreation Parking Area Environmental Assessment, United States Forest Service
Clow Point Winter Recreation Parking Area Environmental Assessment, United States Forest Service
All U.S. Government Documents (Utah Regional Depository)
Payette National Forest proposes to authorize the construction, maintenance, and operation of a two-acre winter recreation parking site just below the Goose Creek overlook (Clow Point) along the Goose Lake Road (FDR #257).
The Probe, Issue 184 – January 1998
The Probe, Issue 184 – January 1998
The Probe: Newsletter of the National Animal Damage Control Association
NADCA Election Results!
PRESIDENT Robert H. Giles, Jr. (VA) VICE PRESIDENT - WEST Mark Collinge (ID) VICE PRESIDENT - EAST Pete Butchko (MS) SECRETARY Richard B. Chipman (VT) TREASURER Grant Huggins (OK)
REGIONAL DIRECTORS: Western (1): Diane deLorimier (CA) Southern Rockies (2): GaryWitmer (CO) Northern Rockies (3): George E. Graves (ID) South Central (4): James R. Gallaspy (LA) North Central (5): James C. Luchsinger (NE) Great Lakes (6): Mike Dwyer (OH) Northeastern (7): Jerry L. Pickel (PA) Centraleastern (8): JohnM. Houben (VA) Southeastern (9): D. Tommy King (MS)
From Our Incoming President: An Opinion....-- Robert H. Giles, Jr.
Carrie Hunt …
Validating A Vegetative Filter Strip Performance Model, Puneet Srivastava, Thomas A. Costello, Dwayne R. Edwards, James A. Ferguson
Validating A Vegetative Filter Strip Performance Model, Puneet Srivastava, Thomas A. Costello, Dwayne R. Edwards, James A. Ferguson
Biosystems and Agricultural Engineering Faculty Publications
Vegetative filter strips (VFS) reduce losses of nutrients, solids, and other materials from land area treated with fertilizers and manures. A number of models are available that simulate nutrient and sediment transport in VFS. While VFS effectiveness is considered to depend on lengths of pollutant source area and VFS areas, few published studies have tried to validate these models using variable pollutant source area and VFS area. The objective of this study was to validate an event-based nutrient transport model (Chaubey et al., 1995) that simulates soluble nutrient transport in VFS. This model links three sub-models: modified Green-Ampt infiltration, non-linear …
The Fungi, Lichens, And Myxomycetes Of Iowa: A Literature Review And Evaluation, Lois H. Tiffany, George Knaphus
The Fungi, Lichens, And Myxomycetes Of Iowa: A Literature Review And Evaluation, Lois H. Tiffany, George Knaphus
Journal of the Iowa Academy of Science: JIAS
The fungi have been, and continue to be, a poorly documented portion of Iowa’s biological inheritance. Although many are perennially present in soil and plant debris and are crucially involved in the release and recycling of materials from organic residues or are partners with plant roots as mycorrhizae, they are not obvious until they produce fruiting structures such as mushrooms, boletes, brackets, puffballs, etc. The fungi causing plant disease are more obvious because of the reactions of their host plants; thus the earliest records of Iowa fungi are of ones causing plant diseases commonly referred to as mildews, rusts, and …
Tcp/Ip Implementation With Endsystem Qos, Sherlia Y. Shi, Gurudatta M. Parulkar, R. Gopalakrishnan
Tcp/Ip Implementation With Endsystem Qos, Sherlia Y. Shi, Gurudatta M. Parulkar, R. Gopalakrishnan
All Computer Science and Engineering Research
This paper presents a Real-time Upcall (RTU) [1] based TCP/IP implementation that guarantees throughput for continuous media applications and ensures low latency bounds for interactive applications. RTU is an endsystem rate-based scheduling mechanism that provides quality of service (QoS) in terms of CPU cycles, to applications. We restructured the existing NetBSD TCP/IP implementation to exploit the RTU concurrency model and to provide predictable performance. Our experimental results show that on two 200 MHz NetBSD PCs connected by a 155Mbps ATM link, the RTU based kernel TCP/IP implementation provides excellent throughput guarantees for periodic connections regardless the system or network load. …
The Green Dyadic Formulation For Radiation Problems With Arbitrary Sources Embedded In Stratified Multi-Layer Structures : Application To Molecular Fluorescence Problems, Robert Lyle Hartman
The Green Dyadic Formulation For Radiation Problems With Arbitrary Sources Embedded In Stratified Multi-Layer Structures : Application To Molecular Fluorescence Problems, Robert Lyle Hartman
Dissertations and Theses
The Green Dyadic method for computing fields due to current sources between parallel interfaces of dielectric materials is studied. Computer implementation of the method as presented in a well-known article leads to the conclusion that significant errors are present. Two dissimilar methods of solution lead to corrected formulations which are shown to be equivalent. The same correction is found in the research literature. For confirmation, computations are performed in examples involving an emitting dipole by both the Green dyadic method and Sommerfeld' s Hertz vector method. Finally, the computational examples are used to compute fluorescence decay rates for emitting dipoles …
Microscale And Nanoscale Testing Of Materials Using Scanning Probe Technologies, Mark Phelan
Microscale And Nanoscale Testing Of Materials Using Scanning Probe Technologies, Mark Phelan
Theses
Understanding solid surfaces and their properties is of crucial importance for many sectors of industry. This interest stems from the fact that solid surfaces are the working interface between a solid material and its environment and in many cases it is this interface which determines both the suitability and life span of a mechanical component. Furthermore the modification of surface properties using coatings and multi-layered materials has grown significantly, particularly in the case of data storage, optics and microelectronics. The demands of these and other sectors have provided the impetus for the development of material testing techniques applicable to coatings …
Virtual Reality Modelling Of A Cnc Machine, Damian O'Sullivan
Virtual Reality Modelling Of A Cnc Machine, Damian O'Sullivan
Theses
The increasing importance of training and upgrading skills has led to the use of new interactive technologies in the development of more effective training tools. Previous techniques for training Computer Numerical Control (CNC) machine operators, while excellent for their time, varied from brief inexpensive tutorials to expensive on the job training. A CNC machine uses a computer to perform the functions of the machine using a part program stored in the memory of the computer. This thesis describes a Virtual Reality (VR) model of a CNC milling machine, implemented within a VR environment representing a CNC workshop. Its development and …
Bioremediation Of Soil Contaminated With Explosives, Catherine A. Axtell
Bioremediation Of Soil Contaminated With Explosives, Catherine A. Axtell
Dissertations and Theses @ UNI
Bioremediation of contaminated soil and water has been the topic of considerable research interest. White rot fungi have recently been proposed for use in biodegradation of explosives. The explosives, TNT, RDX and HMX are integral components of the manufacture of munitions. The wastes from the production of these and other explosives have been discharged into the surrounding environment resulting in contamination. Phanerochaete chrysosporium and strain F600, a proprietary white rot fungus developed by Mycotech Corporation, were studied with regard to their ability to degrade TNT, HMX and RDX in liquid cultures and in soil. Laboratory studies demonstrated that P. chrysosporium …
The Role Of Management In The Movement Towards Sustainability: Perceived Responsibilities, Challenges, And Opportunities, Martin Brueckner
The Role Of Management In The Movement Towards Sustainability: Perceived Responsibilities, Challenges, And Opportunities, Martin Brueckner
Theses: Doctorates and Masters
The aim of this thesis was to explore the role of management in the movement towards ecologically sustainable development (ESD), investigating perceived responsibilities, challenges, and opportunities facing business management today. The point of departure for this study was the acknowledgement of the present paucity of references to ESD within the management literature, widespread amoral business conduct, and the dominance of economic rationalism within business science. This research provided an analytical review of ESD related literature, concentrating on the history and rise of the ESD paradigm, its ethical underpinnings, and economic implications to management practice. The paper highlighted the importance of …
User Response And Organisational Fit For Information Systems In Earth Observation, Jeff Kingwell
User Response And Organisational Fit For Information Systems In Earth Observation, Jeff Kingwell
Theses: Doctorates and Masters
A group of seventy six scientists and data managers in the Australian research agency CSIRO were surveyed to establish their needs and preferences in relation to information systems for Earth observation data. After study of available alternatives, three prototype Earth observation information management systems were installed and the user response was evaluated through interview of fifteen of the group. The prototypes consisted of web-based client servers which permitted users to interrogate databases of Earth observation datasets; to search for information about sensor or satellite performance, and to retrieve data and information products. The chosen systems were CILS, the CEOS (Committee …
The Role Of The Einstein Library Of Nova Southeastern University In Meeting The Needs Of Distance Education Students, Anne K. Abate
The Role Of The Einstein Library Of Nova Southeastern University In Meeting The Needs Of Distance Education Students, Anne K. Abate
CCAC Theses and Dissertations
The goal of this study was to evaluate the information needs of a selected segment of the distance learning graduate student population served by the Einstein Library at Nova Southeastern University and to propose a new model of library service based on the implementation of current and emerging technologies. Several survey instruments were developed and administered through electronic mail to students and faculty in the School of Computer and Information Sciences, the Center for Psychological Studies, and the School of Social and Systemic Studies, the Fischler Center for the Advancement of Education and the School of Business and Entrepreneurship at …
Anisotropic Motion Of Lipids In Hydrophobic Core Of Dppc Bilayers. Simulation Of Esr Spectra, Canan Teti̇k, Mustafa Korkmaz
Anisotropic Motion Of Lipids In Hydrophobic Core Of Dppc Bilayers. Simulation Of Esr Spectra, Canan Teti̇k, Mustafa Korkmaz
Turkish Journal of Physics
Planar samples prepared by drying phospholipid dispersions on glass slides provide a convenient model to examine motion and orientation in lipid bilayer structures. In the present work, hydrophobic cores of DPPC multibilayers were studied using a 16-DSA spin label consisting of a nitroxide free radical bonded to the 16 position of stearic acid. This spin label is in great demand for investigation of phase transitions occurring in the hydrophobic cores of lipid multibilayers. Thus, its room temperature motional and orientational features in phospholipid bilayers must be known accurately to avoid any misinterpretation in using it in these types of studies. …
Fdtd Evaluation Of The Sar Distribution In A Human Head Near A Mobile Cellular Phone, Selçuk Paker, Levent Sevgi̇
Fdtd Evaluation Of The Sar Distribution In A Human Head Near A Mobile Cellular Phone, Selçuk Paker, Levent Sevgi̇
Turkish Journal of Electrical Engineering and Computer Sciences
In this study, Finite-Difference Time-Domain (FDTD) method is used to calculate the Specific Absorbtion Rate (SAR; defined as the power absorbed by unit mass of the tissue) distribution in a human head near a hand-held cellular phone. A three dimensional FDTD algorithm is built in cartesian coordinates. A discrete human head model, derived from a Nuclear Magnetic Resonance (NMR) image by semi-automatic algorithm, is located within FDTD volume together with a discrete hand-held receiver model. FDTD simulations are carried out for both european GSM (operating at 900MHz) and DECT (operating at 1.8GHz) systems with a quarter-wavelength antenna, mounted on top …
The Moderate Resolution Imaging Spectroradiometer (Modis): Land Remote Sensing For Global Change Research, Christopher O. Justice, Eric Vermote, John R. G. Townshend, Ruth Defries, David P. Roy, Dorothy K. Hall, Vincent V. Salomonson, Jeffrey L. Privette, George Riggs, Alan Strahler, Wolfgang Lucht, Ranga P. Myneni, Yuri Knyazikhin, Steve W. Running, Rama R. Nemani, Zhengming Wan, Alfredo R. Huete, Wim Van Leeuwen, Robert E. Wolfe, Louis Giglio, Jan-Peter Muller, Philip Lewis, Michael J. Barnsley
The Moderate Resolution Imaging Spectroradiometer (Modis): Land Remote Sensing For Global Change Research, Christopher O. Justice, Eric Vermote, John R. G. Townshend, Ruth Defries, David P. Roy, Dorothy K. Hall, Vincent V. Salomonson, Jeffrey L. Privette, George Riggs, Alan Strahler, Wolfgang Lucht, Ranga P. Myneni, Yuri Knyazikhin, Steve W. Running, Rama R. Nemani, Zhengming Wan, Alfredo R. Huete, Wim Van Leeuwen, Robert E. Wolfe, Louis Giglio, Jan-Peter Muller, Philip Lewis, Michael J. Barnsley
United States National Aeronautics and Space Administration: Publications
The first Moderate Resolution Imaging Spectroradiometer (MODIS) instrument is planned for launch by NASA in 1998. This instrument will provide a new and improved capability for terrestrial satellite remote sensing aimed at meeting the needs of global change research. The MODIS standard products will provide new and improved tools for moderate resolution land surface monitoring. These higher order data products have been designed to remove the burden of certain common types of data processing from the user community and meet the more general needs of global-to-regional monitoring, modeling, and assessment. The near-daily coverage of moderate resolution data from MODIS, coupled …
1998 Platte River Basin Ecosystem Symposium Proceedings
1998 Platte River Basin Ecosystem Symposium Proceedings
Water Current Newsletter
No abstract provided.
Phthalocyanines And Related Compounds: Subunits For The Preparation Of Molecular Materials, J. Garcia, A. Gonzalez, A. Gouloumis, E.M. Maya, M.D. Perez, B.D. Rey, P. Vazquez, T. Torres
Phthalocyanines And Related Compounds: Subunits For The Preparation Of Molecular Materials, J. Garcia, A. Gonzalez, A. Gouloumis, E.M. Maya, M.D. Perez, B.D. Rey, P. Vazquez, T. Torres
Turkish Journal of Chemistry
The design, synthesis, structural and physical characterization and engineering, and the study of the electrical conductivity and the nonlinear optical properties of phthalocyanines and molecular substances related to them, such as subphthalocyanines, hemiporphyrazines and triazolephthalocyanines were reviewed.
Electropolymerization Of Thiophene With And Without Aniline In Acetonitrile, Muzaffer Can, Kadir Pekmez, Nuran Pekmez, Attila Yildiz
Electropolymerization Of Thiophene With And Without Aniline In Acetonitrile, Muzaffer Can, Kadir Pekmez, Nuran Pekmez, Attila Yildiz
Turkish Journal of Chemistry
The electrooxidation behaviors of thiophene and 3-methylthiophene on a Pt surface in acetonitrile/tetrabutylammonium tetrafluoroborate solution were investigated using cyclic voltammetry. The electropolymerization of these monomers and electrochemical properties of polythiophene and poly(3-methylthiophene) were studied in neutral, acidic and basic media. Mechanisms related to the formation of polymers and electroactivity loss were proposed. The effect of thiophene on the electropreparation and properties of polyaniline were also investigated. The presence of thiophene in solutions of aniline in acetonitrile accelerates the formation and causes an improvement in the conductivity of polyaniline films. Thiophene, which catalyzes the polyaniline formation, enters into the structure of …
Electrically Conductive Polymer Grafts Prepared By Electrochemical Polymerization Of Pyrrole Onto Poly[(Methyl Methacrylate)-Co-(2-(N-Pyrrolyl) Ethyl Methacrylate)] Electrodes, Nuran Balci, Ural Akbulut, Levent Toppare, Dietmar Stanke, Manfred L. Hallensleben
Electrically Conductive Polymer Grafts Prepared By Electrochemical Polymerization Of Pyrrole Onto Poly[(Methyl Methacrylate)-Co-(2-(N-Pyrrolyl) Ethyl Methacrylate)] Electrodes, Nuran Balci, Ural Akbulut, Levent Toppare, Dietmar Stanke, Manfred L. Hallensleben
Turkish Journal of Chemistry
Pyrrole was grafted on poly[(methyl methacrylate)-co-(2-(N-pyrrolyl) ethyl methacrylate)] (PMMA-co-PEMA) using constant potential electrolyses. The thermal stability of PMMA-co-PEMA was improved as a result of electrochemical grafting with pyrrole. The electrochemical behavior of the films was studied by cyclic voltammetry. Pyrrole was found to be electroactive on PMMA-co-PEMA electrodes.
The Removal Of Organic Sulfur From Two Turkish Lignites By Chlorinolysis, Yücel Y. Kadioğlu, Semra Karaca, Samih Bayrakçeken, M. Şahin Gülaboğlu
The Removal Of Organic Sulfur From Two Turkish Lignites By Chlorinolysis, Yücel Y. Kadioğlu, Semra Karaca, Samih Bayrakçeken, M. Şahin Gülaboğlu
Turkish Journal of Chemistry
The removal of organic sulfur from two Turkish lignites by chlorinolysis with chlorine gas in water and water-carbon tetrachloride media at ambient pressure was examined. The effects of stirring speed (5-20 s^{-1}), particle size (250-425, 150-180 and 74-88 \mu m), temperature (13-70°C) and time (0-10800 s) were investigated. Significant portions of the organic sulfur in the coal samples were removed.
Potentiometric Titrations Of Semicarbazone Derivatives 6-Keto 9-17 Mono Methyl Substituted Octadecanoic Acids In Non-Aqueous Media, Mustafa Yalçin, Süleyman Tanyolaç, İrfan Kizilcikli, Aydın Tavman
Potentiometric Titrations Of Semicarbazone Derivatives 6-Keto 9-17 Mono Methyl Substituted Octadecanoic Acids In Non-Aqueous Media, Mustafa Yalçin, Süleyman Tanyolaç, İrfan Kizilcikli, Aydın Tavman
Turkish Journal of Chemistry
The pK$_a$ values of 6-semicarbazone 9-17 monomethyl substituted octadecanoic acids were determined using the potentiometric titration method. 2-Propanol was used as the non-aqueous medium and tetrabutylammonium hydroxide (TBAH) as the titrant in the experiments. The contribution of semicarbazone and methyl groups to the pK$_a$ values of octadecanoic acids was investigated and evaluated. In addition, observations were made on the IR spectra of the compounds.
Determination Of The Protonation Constants Of 2-[4-Dimethylaminocinnamalamino] Benzoic Acid (Dacab) In Dioxane - Water Medium And Preparation Of Some Of Its Transition Metal Complexes, Mustafa Yalçin, Harun Mutluay, Hüsnü Cankurtaran
Determination Of The Protonation Constants Of 2-[4-Dimethylaminocinnamalamino] Benzoic Acid (Dacab) In Dioxane - Water Medium And Preparation Of Some Of Its Transition Metal Complexes, Mustafa Yalçin, Harun Mutluay, Hüsnü Cankurtaran
Turkish Journal of Chemistry
In this study, the Schiff base 2-[4-Dimethylaminocinnamalamino]- benzoic acid [(CH$_3$)$_2$N.C$_6$H$_4$.CH:CH.N.C$_6$H$_4$.COOH] (DACAB) was prepared by the reaction of 2-Aminobenzoic acid with p-Dimethylaminocinnamaldehyde. The protonation constants of the ligand were determined in a 50\% (v/v) dioxane - water medium using the Irving-Rossotti and PKAS-BEST computer methods. The complexes of Fe(III), Co(II), Ni(II), Cu(II) with DACAB were synthesized and the structures of these complexes were elucidated by means of data obtained from elemental analysis, using IR, $^1$H-NMR methods. The magnetic properties of the solid complexes were measured.
Electrochemical Polymerization And Analysis Of Some Aniline Derivatives, Bekir Sari, Muzaffer Talu
Electrochemical Polymerization And Analysis Of Some Aniline Derivatives, Bekir Sari, Muzaffer Talu
Turkish Journal of Chemistry
In this study, conductive homopolymers of o-chloroaniline, p-bromoaniline and N-methylaniline were synthesized electrochemically in perchloric acidic solution and their properties were analyzed. Initially, the maximum oxidation potential values of these monomer solutions were determined by Cyclic Voltammetry (CV). Their conductive polymers were then synthesized under a nitrogen atmosphere using a potentiostat. FTIR spectra were taken in order to analyze the structural properties of the resulting polymers. Thermogravimetric analysis (TGA) was conducted and surface micrographs were taken by a Scanning Electron Microscope (SEM). The conductivity levels of the polymers were determined by the Four Probe technique. Magnetic properties of the samples …
Polarographic Studies On The Kinetics Of The Electrode Reaction Of 4-Benzoyl-1,5 Diphenyl Pyrazole-3-Carboxylic Acid, M. Veri̇rşen, S. Erturan
Polarographic Studies On The Kinetics Of The Electrode Reaction Of 4-Benzoyl-1,5 Diphenyl Pyrazole-3-Carboxylic Acid, M. Veri̇rşen, S. Erturan
Turkish Journal of Chemistry
The polarographic behavior of 4-Benzoyl-1,5 diphenyl pyrazole-3- Carboxylic acid (BDPPCA) in aqueous ethanol solution (76 \% v/v) at 25^oC was studied as a function of pH using Mcl buffer solution. One well-defined wave was obtained in the pH range of 3.3-5.4. This wave, corresponding to two electron reduction processes, was irreversible and diffusion controlled. However, in the pH range of 5.4-7.4 a single reversible and diffusion-controlled wave involving two electrons resulted. The kinetic parameters $(n_a, k^o_{f,h})$ were calculated by Koutecky's method. A tentative mechanism was put forward for the reduction process of depolarizer. Furthermore, the effects of different supporting electrolytes …