Chemistry & Earth Sciences: Recent submissions
Now showing items 481-500 of 587
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Polymerization of 3-cyanopropyl (triethoxy) silane: A kinetic study using gas chromatography
( John Wiley and SonsInc. , 2018 , Article)Gas chromatography (GC) was used to study the kinetics of the 3-cyanopropyl triethoxysilane (CTES) polymerization. The reaction is a consecutive complex reaction that depends mainly on the kinetics of the first hydrolyzed ... -
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Degradation of Diallyl Phthalate (DAP) by fenton oxidation: Mechanistic and kinetic studies
( MDPI AG , 2018 , Article)In this work, the degradation and mineralization of Diallyl Phthalate (DAP) in water by Fenton oxidation was investigated. The effects of different experimental parameters including the initial pH, the hydrogen peroxide ... -
Surfactant-aided impregnation of MnF2 into CNT fabrics as cathode material with high electrochemical performance for lithium ion batteries
( Elsevier , 2018 , Article)© 2018 Elsevier Ltd MnF2 infiltrated-CNT fabrics was prepared by surfactant-aided impregnation of MnSiF6 precursors in acid-treated CNT fabric followed by annealing MnSiF6-loaded CNT fabric. The structural and morphological ... -
Laser Induced Periodic Surface Structures on Nano Metal Oxide filled Polyvinylidene Fluoride Nanocomposites
( Elsevier , 2018 , Article)The ability of polarized pulsed laser in surface modification of substrate surfaces without thermally destroying them is a well-established concept of scientific procedure. In this work, we report the laser induced surface ... -
Magnetic solid phase extraction (MSPE) for chromatographic separation of carbamates.
( Wiley , 2018 , Article)Magnetic solid phase extraction particles (MSPE) were produced using magnetite nanoparticles with diameters between 9 and 13 nm as nucleating agent. The produced particles with magnetite cores were smaller, and more irregular ... -
Polymeric Micelles of Biodegradable Diblock Copolymers: Enhanced Encapsulation of Hydrophobic Drugs
( MDPI , 2018 , Article Review)Polymeric micelles are potentially efficient in encapsulating and performing the controlled release of various hydrophobic drug molecules. Understanding the fundamental physicochemical properties behind drug–polymer systems ... -
Interaction of: P -synephrine with p -chloranil: Experimental design and multiple response optimization
( Royal Society of Chemistry , 2016 , Article)© 2016 The Royal Society of Chemistry. In the current paper, and for the first time, spectrophotometry coupled with a set of factorial designs was executed as a new tool for investigating the interaction between p-synephrine ... -
Photoinduced electron transfer interaction of anthraquinones with aniline quenchers: Influence of methyl substitution in aniline donors
( Elsevier , 2017 , Article)© 2016 Elsevier B.V. Photoinduced electron transfer between triplet state of 9,10-anthraquinone (AQ) and its two derivatives: 2-chloro-9,10-anthraquinone (CAQ) and sodium anthraquinone-2-sulfonate (AQS) and ground state ... -
Unusual product from the acid-catalyzed one-pot, multicomponent reaction of thiocarbohydrazide, aldehydes, and phenacyl bromides
( Taylor & Francis , 2017 , Article)A one-pot, three-component protocol for the synthesis of novel five-membered thiazole ring bonded to two hydrazone motifs is described. The acid-catalyzed reaction of one equivalent of thiocarbohydrazide, two equivalents ... -
Synthesis and Physicochemical Studies of Perovskite Manganite La0.8Ca0.2Nn1−xCoxO3 (0 ≤ x ≤ 0.3)
( The Korean Magnetics Society , 2017 , Article)The physicochemical properties of La0.8Ca0.2Mn1−xCoxO3 nanopowders as a function of Co content (x) have been investigated. La0.8Ca0.2Mn1−xCoxO3 nanopowders were synthesized by sol-gel method and morphologically and ... -
Critical Behavior of La0.8Ca0.2Mn1−xCoxO3 Perovskite (0.1 ≤ x ≤ 0.3)
( MDPI , 2017 , Article)The critical properties of La0.8Ca0.2Mn1−xCoxO3 (x = 0, 0.1, 0.2 and 0.3) compounds were investigated by analysis of the magnetic measurements in the vicinity of their critical temperature. Arrott plots revealed that the ... -
Evidence by ac-conductivity for the higher mobility of boron (over aluminium)-associated Brønsted sites in boron-modified HZSM-5
( Elsevier , 1996 , Article)A correlation ac-conductivity analysis is performed at 102–105 Hz, 373–613 K and 0.8 V for characterizing the effect of increasing boron incorporation in HZSM-5 lattice on altered electric features in BZSM-5 samples of ... -
Ac-conductivity analysis of the effects of partial dealumination and γ-irradiation on the electric features of HZSM-5
( Elsevier , 1996 , Article)For illustrating such titled effects, analysis of the electric impedance, capacitance, and dielectric loss dependences on the frequency W (0.1–100 kHz) and temperature T (373–673 K) is correlated at 0.8 V for γ-irradiated ... -
Alpha-glucosidase and carbonic anhydrase inhibition studies of Pd(II)-hydrazide complexes
( Elsevier , 2017 , Article)This study focused on the synthesis and characterization of hydrazide ligands and their respective Pd(II) complexes and used high throughput screening to determine their α-glucosidase and carbonic anhydrase II enzyme ... -
Evaluation of pesticide residues of organochlorine in vegetables and fruits in Qatar: statistical analysis
( Springer Verlag , 2016 , Article)The study aimed to examine the residues of organochlorines pesticides (OCPs) in vegetables and fruits in Qatar. A total of 127 samples was studied. Ninety percent of the imported samples recorded residues above the maximum ... -
Review on Synthesis, Characterizations, and Electrochemical Properties of Cathode Materials for Lithium Ion Batteries
( OMICS International , 2016 , Article)The development of cutting-edge cathode materials is a challenging research topic aiming to improve the energy and power densities of lithium ion batteries (LIB) to cover the increasing demands for energy storage devices. ... -
Computational study on oxynitride perovskites for CO2 photoreduction
( Elsevier Ltd , 2016 , Article)The photocatalytic conversion of CO2 into chemical fuels is an attractive route for recycling this greenhouse gas. However, the large scale application of such approach is limited by the low selectivity and activity of the ... -
Prevention of gallium arsenide photocorrosion by an epoxy adhesion layer
( Elsevier Ltd , 2004 , Article)Coating of gallium arsenide with an adhesion layer of commercial epoxy prevented its photocorrosion. A two-component room temperature curing adhesive paste (Araldite 2014) has been selected. When GaAs/Araldite was employed ... -
Activation and stabilization of gallium arsenide anode in an aqueous photoelectrochemical cell
( Elsevier B.V. , 2003 , Article)The formation of a porous layer on the surface of gallium arsenide anode, n-GaAs, increases photogenerated currents significantly. This layer was formed as a result of an anodic polarization of illuminated n-GaAs in acidified ...
