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Articles 1 - 29 of 29
Full-Text Articles in Physical Sciences and Mathematics
Leaching Mechanism Of Semiconducting Minerals, Fathi Habashi
Leaching Mechanism Of Semiconducting Minerals, Fathi Habashi
Fathi Habashi
The mechanism of leaching of semiconducting minerals such as PbS, ZnS, UO2, etc., has been the subject of intensive speculation by hydrometallurgists in the early 1950s. The electrochemical mechanism proposed in 1970 by the author in volume 2 of his Principles of Extractive Metallurgy avoids the assumption of forming intermediate complexes that cannot be isolated or identified.
Some Features Of The Concentration Oscillations In The Phenylacetylene Oxidative Carbonylation Reaction (In Russian), Sergey N. Gorodsky
Some Features Of The Concentration Oscillations In The Phenylacetylene Oxidative Carbonylation Reaction (In Russian), Sergey N. Gorodsky
Sergey N. Gorodsky
Some modes of concentration oscillations in the homogeneous system KI-PdI2-CO-O2-CH3OH are described in this paper.
Energetyka Niskoemisyjna, Wojciech M. Budzianowski
Energetyka Niskoemisyjna, Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Photoreactive Crystalline Quasiracemates, Rebecca C. Grove, Steven H. Malehorn, Meghan E. Breen, Kraig A. Wheeler
Photoreactive Crystalline Quasiracemates, Rebecca C. Grove, Steven H. Malehorn, Meghan E. Breen, Kraig A. Wheeler
Kraig A. Wheeler
Rationally designed racemic and quasiracemic sulfonamidecinnamic acids assemble to give hydrogen-bonded dimers with coplanar alignment of neighboring olefins. The quasiracemate phase contains near inversion-related motifs with chemically distinct components forming supramolecular heterodimers that undergo asymmetric photodimerization.
Study Of Nano Structure Mn/Alumina Catalyst Deactivation Through Catalytic Oxidation Of O-Vocs, Hosein Afshary
Study Of Nano Structure Mn/Alumina Catalyst Deactivation Through Catalytic Oxidation Of O-Vocs, Hosein Afshary
Hosein Afshary
the deactivation and selectivity behavior of nanostructure Mn/γ-Al2O3 catalyst in catalytic oxidation of an O-VOC (isopropanol) was studied. The polluted air was simulated and the catalyst was tested in the course of 50-h time-on-stream. Characterization of fresh and used catalysts was done using FT-IR, XRD, SEM and EDS methods. Comparing the testing results of this catalyst and that of the industrial Pt/Al2O3 catalyst showed that prepared catalyst can be suitable for substitution with the expensive pt/Al2O3 catalyst in environmental applications.
Metals: Typical And Less Typical, Transition And Inner Transition, Fathi Habashi
Metals: Typical And Less Typical, Transition And Inner Transition, Fathi Habashi
Fathi Habashi
While most chemists agree on what is a metal and what is a non-metal there is a disagreement with respect to what is a metalloid and what is a transition metal. It is believed that this problem can be solved if two new terms are adopted: typical and less typical metals. These new terms will also help reconcile the European Periodic Table versus the North American regarding numbering of groups as well as the IUPAC numbering which could be as well abandoned in favour of group names as will be shown in the manuscript.
Phosphate Industry And The Radon Problem, Fathi Habashi
Phosphate Industry And The Radon Problem, Fathi Habashi
Fathi Habashi
The problem of radon generated during the treatment of phosphate rock by sulfuric acid to produce fertilizers can be solved by using nitric acid. In this case radium, which is the source of radon, goes into solution and can be precipitated by a controlled method and safely disposed of. A variety of options are discussed. Text in Farsi with English translation.
Investigation Of Deactivation Of Transition Metal Oxide Catalysts Supported On Γ-Al2o3 During Catalytic Oxidation Of Some Oxygen Containing Vocs In A Tubular Reactor, Hosein Afshary
Hosein Afshary
It is necessary to decrease the emission of Volatile organic compound ( VOCs ) to air and among of all destructive techniques used for decreasing these compounds, Catalytic Oxidation is considered a suitable technique but deactivation of catalysts through catalytic processes is one of the major problems and most be studied. In this Project, at First, gamma alumina supported metal oxide catalysts were made and also industrial Pt catalyst was prepared. Then structure of these catalysts was studied using XRD, SEM and FT-IR techniques. These techniques approved the nanostructure of catalysts. The amount of supported metals in each catalyst was …
Improvement Of The Stoichiometric Network Analysis For Determination Of Instability Conditions Of Complex Nonlinear Reaction Systems, Zeljko D. Cupic
Improvement Of The Stoichiometric Network Analysis For Determination Of Instability Conditions Of Complex Nonlinear Reaction Systems, Zeljko D. Cupic
Zeljko D Cupic
No abstract provided.
Electrodeposition Of Quaternary Alloys In The Presence Of Magnetic Field, Yatimah Alias
Electrodeposition Of Quaternary Alloys In The Presence Of Magnetic Field, Yatimah Alias
Yatimah Alias
Electrodeposition of Ni-Co-Fe-Zn alloys was done in a chloride ion solution with the presence and absence of a Permanent Parallel Magnetic Field (PPMF). The PPMF was applied parallel to the cathode surface. The deposition profile was monitored chronoamperometrically. It was found that the electrodeposition current was enhanced in the presence of PPMF (9 T) compared to without PPMF. The percentage of current enhancement (Gamma%) was increased in the presence of PPMF, with results of Gamma% = 11.9%, 16.7% and 18.5% at -1.1, -1.2 and -1.3 V respectively for a 2400 sec duration. In chronoamperometry, the Composition Reference Line (CRL) for …
Multi-Component Bi-Layers Featuring 1-Octyl-2,3-Dimethylimidazolium Boolean And P-Sulfonatocalix 4 Arene Supermolecules, Yatimah Alias
Multi-Component Bi-Layers Featuring 1-Octyl-2,3-Dimethylimidazolium Boolean And P-Sulfonatocalix 4 Arene Supermolecules, Yatimah Alias
Yatimah Alias
Multi-component solid state structures containing 1-octyl-2,3-dimethylimidazolium cations, anionic p-sulfonatocalix[4]arenes and/or large mono-phosphonium cations, as well as lanthanide metal ions are readily accessible, which have the calixarenes organised into bi-layers with gadolinium(III) coordinated between them. The imidazolium ring is confined in the calixarene cavity, essentially forming "molecular capsules'' based on two calixarenes, or with the n-octyl chain penetrating the adjacent bi-layer, with the nature of the calixarene-dimethylimidazolium interplay mapped out using Hirshfeld surface analysis. The supermolecules [1-octyl-2,3-dimethylimidazolium p-sulfonatocalix[4]arene] are persistent in aqueous solutions ((1)H NMR).
My Curriculum Vitae (As January 2013), Yun Hau Ng
My Curriculum Vitae (As January 2013), Yun Hau Ng
Yun Hau Ng
References available upon request
The Rhizosphere: A Synchrotron- Based View Of Nutrient Flow In The Root Zone, Theodore K. Raab, David A. Lipson
The Rhizosphere: A Synchrotron- Based View Of Nutrient Flow In The Root Zone, Theodore K. Raab, David A. Lipson
Ted K. Raab
At two energy “endpoints” of the EM spectrum accessible to synchrotron biologists (IR radiation and soft X-rays), we have found experimental methods providing unique opportunities to observe processes and test hypotheses essential to understanding plantsoil- microbe interactions. Availability of IR synchrotron beamlines will continue to expand worldwide, and we hope that plant and microbial biologists will incorporate the type of spectral data presented in this chapter as just one of a legion of “-omics” methods. Considering the shear flux of C through belowground ecosystems annually (and how poorly constrained they are in many regions), synchrotrons must continue to demand the …
(2e)-1-(6-Chloro-2-Methyl-4-Phenylquinolin-3-Yl)-3-Phenylprop-2-En-1-One, Tan Kong Wai, Viji A. J., Vijayakumar V., Sarveswari S.
(2e)-1-(6-Chloro-2-Methyl-4-Phenylquinolin-3-Yl)-3-Phenylprop-2-En-1-One, Tan Kong Wai, Viji A. J., Vijayakumar V., Sarveswari S.
Tan Kong Wai
In the title compound, C(25)H(18)ClNO, the conformation about the C=C double bond is E. Significant twists are evident in the molecule, with the benzene ring forming a dihedral angle of 53.92 (11)degrees with the quinolinyl residue. Further, the chalcone residue is approximately perpendicular to the quinolinyl residue [C(q)-C(q)-C(c)-O(c) torsion angle = -104.5 (3)degrees, where q = quinolinyl and c = chalcone]. In the crystal, the presence of C-H center dot center dot center dot O and C-H center dot center dot center dot pi interactions leads to supramolecular layers lying parallel to ((1) over bar 02).
Simple Room-Temperature Preparation Of High-Yield Large-Area Graphene Oxide, Huang Nay Ming
Simple Room-Temperature Preparation Of High-Yield Large-Area Graphene Oxide, Huang Nay Ming
Huang Nay Ming
Graphene has attracted much attention from researchers due to its interesting mechanical, electrochemical, and electronic properties. It has many potential applications such as polymer filler, sensor, energy conversion, and energy storage devices. Graphene-based nanocomposites are under an intense spotlight amongst researchers. A large amount of graphene is required for preparation of such samples. Lately, graphene-based materials have been the target for fundamental life science investigations. Despite graphene being a much sought-after raw material, the drawbacks in the preparation of graphene are that it is a challenge amongst researchers to produce this material in a scalable quantity and that there is …
2-(3-Nitrophenoxy)Quinoxaline, Hairul Anuar Bin Tajuddin
2-(3-Nitrophenoxy)Quinoxaline, Hairul Anuar Bin Tajuddin
Hairul Anuar Bin Tajuddin
In the title molecule, C(14)H(9)N(3)O(3), the dihedral angle between the quinoxaline and benzene rings is 77.13 (9)degrees. The molecule is twisted about the ether-benzene O-C bond, with a C-O-C-C torsion angle of -102.8 (2)degrees. In the crystal, molecules are linked by C-H center dot center dot center dot O hydrogen bonds, forming layers in the ab plane, with one nitro O atom accepting two such interactions. The layers stack along the c-axis direction via weak C-H center dot center dot center dot pi interactions.
Grafika Inżynierska Ćw., Wojciech M. Budzianowski
Grafika Inżynierska Ćw., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Projektowanie Procesów Biotechnologicznych Proj., Wojciech M. Budzianowski
Projektowanie Procesów Biotechnologicznych Proj., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Projektowanie I Optymalizacja Procesów Proj., Wojciech M. Budzianowski
Projektowanie I Optymalizacja Procesów Proj., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Metody Numeryczne Lab., Wojciech M. Budzianowski
Metody Numeryczne Lab., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Odnawialne Źródła Energii W., Wojciech M. Budzianowski
Odnawialne Źródła Energii W., Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
An Investigation Of Speech Enhancement Using Wavelet Filtering Method, International Journal Of Speech Technology, Philadelphia University
An Investigation Of Speech Enhancement Using Wavelet Filtering Method, International Journal Of Speech Technology, Philadelphia University
Philadelphia University, Jordan
No abstract provided.
Jordanian Commercial Bank Strategies In High- Rate Of Return Realization And Its Relation With Liquidity Gap Management Performance, Philadelphia University
Jordanian Commercial Bank Strategies In High- Rate Of Return Realization And Its Relation With Liquidity Gap Management Performance, Philadelphia University
Philadelphia University, Jordan
No abstract provided.
Testing Lyoequivalency For Three Commercially Sustainedrelease Tablets Containing Diltiazem Hydrochloride, Philadelphia University
Testing Lyoequivalency For Three Commercially Sustainedrelease Tablets Containing Diltiazem Hydrochloride, Philadelphia University
Philadelphia University, Jordan
No abstract provided.
The Novel And The Experimentation, Philadelphia University
The Novel And The Experimentation, Philadelphia University
Philadelphia University, Jordan
No abstract provided.
Neural-Network-Based Fuzzy Identifier: Design And Evaluation, Philadelphia University
Neural-Network-Based Fuzzy Identifier: Design And Evaluation, Philadelphia University
Philadelphia University, Jordan
No abstract provided.
Using Database Marketing To Enhance Direct Marketing Alternatives In Jordanian Industrial Shareholders Corporations, Philadelphia University
Using Database Marketing To Enhance Direct Marketing Alternatives In Jordanian Industrial Shareholders Corporations, Philadelphia University
Philadelphia University, Jordan
No abstract provided.
10,12-Dimethylpteridino[6,7-F][1,10]- Phenanthroline-11,13(10h,12h)-Dione– Chloroform (1/1), Waynie Olaprath, Jennifer Rodin, Kraig A. Wheeler, Mark E. Mcguire
10,12-Dimethylpteridino[6,7-F][1,10]- Phenanthroline-11,13(10h,12h)-Dione– Chloroform (1/1), Waynie Olaprath, Jennifer Rodin, Kraig A. Wheeler, Mark E. Mcguire
Kraig A. Wheeler
In the title co-crystal, C18H12N6O2_CHCl3, intramolecular Cl3C—H_ _ _N hydrogen-bonding interactions occur between a single CHCl3 and both N atoms at the 1,10-positions on the phenanthroline portion of the molecule. The interplanar distance between inversion-related molecules is 3.241 (2) A ° .
Aqua Science Through The Ages. An Illustrated History Of Water, Fathi Habashi
Aqua Science Through The Ages. An Illustrated History Of Water, Fathi Habashi
Fathi Habashi
Water a component of the Four Elements considered by the ancient philosophers as essential for survival, played, and is still playing an essential role in society. Great civilizations in ancient times developed along great rivers. The ancient peoples knew how to manage water supplies by digging canals, controlling floods, and using water for irrigation. They designed equipment that used water to measure the time, to determine the density of solids, to fight fires, and to create vacuum. Modern engineers exploited water flow to design and construct huge hydroelectric power stations. Waterways and navigation systems were also an essential element for …