Chemistry & Earth Sciences: المرسلات الحديثة
السجلات المعروضة 81 -- 100 من 609
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Adsorption of 2, 4-dichlorophenoxyacetic acid onto date seeds activated carbon: Equilibrium, kinetic and thermodynamic studies
(2012 , Article)Adsorption isotherm and kinetics of 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide on activated carbon prepared from Barhi date seeds were determined from batch tests. The effects of contact time, initial herbicide ... -
Batch study for herbicide bentazon adsorption onto palm oil fronds activated carbon
(2012 , Article)The adsorption of herbicide bentazon from aqueous solution onto activated carbon derived from palm oil fronds (PFAC) was investigated through batch study. The effects of both; initial concentration of the bentazon (ranging ... -
Response to: "Cancer risk due to contamination: Consideration from market basket survey in Qatar"
( Elsevier , 2014 , Article)We welcome the comments on our article entitled “A market basket survey of As, Zn and Se in rice imports in Qatar: Health implications” (Rowell et al., 2014). The commenter opens up the debate on what constitutes a safe ... -
The use of optical spectroscopy as abiomarker probe for fungi identification
( Research India Publications , 2013 , Article)Spectroscopic techniques includinginfrared,Raman (FT-Raman) and ultraviolet spectroscopy (UV-Vis)spectroscopy were used to identify and differentiate three fungi within the same Aspergillus genus (A. fumigatus, A. terreusand ... -
Infrared spectroscopy as an ultrastructure bio-probe for fungal cellular characterization
( Research India Publications , 2013 , Article)Fourier transform infrared spectroscopy was used to characterize the biochemical composition of fungal cells. It also was applied to detect the differences between the biochemical constituents of spores and hyphae of A. ... -
Spectroscopic studies on the charge-transfer complex [VO(acac) 2]I5 formed in the reaction of oxovanadium(IV) acetylacetonate with iodine
(2005 , Article)Spectroscopic Studies on the Charge-Transfer Complex [VO(acac)2]I5 Formed in the Reaction of Oxovanadium(IV)acetylacetonate with Iodine -
Ether, sulfide and sulfone derivatives of cinnamaldehyde: Insights into synthesis, structural elucidation and solvatochromism
( Elsevier B.V. , 2024 , Article)Symmetric ether, sulfide and sulfone derivatives based on Schiff base functionalized group (3a-c) were synthesized via classical condensation of 4,4′-diaminodiphenyl precursors (1a-c) and cinnamaldehyde (2) in methanol at ... -
Co oxidation at near-ambient temperatures over tio2-supported pd-cu catalysts: Promoting effect of pd-cu nanointerface and tio2 morphology
( MDPI AG , 2021 , Article)Significant improvement of the catalytic activity of palladium-based catalysts toward carbon monoxide (CO) oxidation reaction has been achieved through alloying and using different support materials. This work demonstrates ... -
Facile Microwave Synthesis of Hierarchical Porous Copper Oxide and Its Catalytic Activity and Kinetics for Carbon Monoxide Oxidation
( American Chemical Society , 2022 , Article)The synthesis of copper oxide (CuO)-based nanomaterials has received a tremendous deal of interest in recent years. Particularly, the design and development of novel CuO structures with improved physical and chemical ... -
Facile one-step synthesis of supportless porous AuPtPd nanocrystals as high performance electrocatalyst for glucose oxidation reaction
( Elsevier , 2020 , Article)Direct glucose fuel cells (DGFCs) received great interest due to non-toxicity, low cost, and renewability. Herein, we demonstrated the synthesis of novel porous AuPtPd nanocrystals (NCs) via plausible one-pot synthesis ... -
Formation of arsenic sulfide on GaAs surface under illumination in acidified thiourea electrolytes
( Elsevier , 2011 , Article)The present article reports the formation of arsenic sulfide films on GaAs by the potentiodynamic polarization in acidified thiourea (TU) electrolytes under photo-illumination. Oxidation of TU competes with the oxidation ... -
Highly porous PtPd nanoclusters synthesized via selective chemical etching as efficient catalyst for ethanol electro-oxidation
( Elsevier , 2020 , Article)Direct ethanol fuel cells (DEFCs) have received great interest owing to their high power density and environmental friendness. Nevertheless, the designing of active, durable, and efficient anode for DEFCs is a profound ... -
Photoelectrocatalytic hydrogen production on ternary Co-Pi/Ag/TiON nanotube array photocatalysts
( John Wiley and Sons Ltd , 2021 , Article)Ternary Co-Pi-Ag/TiON photocatalysts were designed and fabricated by a facile precipitation and electrochemical strategy. The results showed the superiority of the Co-Pi-Ag/TiON as a promising photoanode for photoelectrochemical ... -
Integrated lab-on-a-chip optical biosensor using ultrathin silicon waveguide soi mmi device
( MDPI AG , 2020 , Article)Waveguides with sub-100 nm thickness offer a promising platform for sensors. We designed and analyzed multimode interference (MMI) devices using these ultrathin platforms for use as biosensors. To verify our design ... -
Tailoring the reducibility and catalytic activity of CuO nanoparticles for low temperature CO oxidation
( Royal Society of Chemistry , 2018 , Article)Copper oxide (CuO) nanoparticles have received considerable interest as active and inexpensive catalysts for various gas–solid reactions. The CuO reducibility and surface reactivity are of crucial importance for the high ... -
The role of type II FB (I):Tl+ defect in laser light generation and color image formation at the low coordination surface sites of AgBr: Ab initio calculations
( Elsevier , 2006 , Article)The role of type II FB (I):Tl+ color center at low coordination surface sites of AgBr thin films in providing tunable laser activity and photographic sensitization is examined. The double-well potential at this site is ... -
Activation and stabilization of gallium arsenide anode in an aqueous photoelectrochemical cell
( Elsevier , 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 ... -
Inhibitory effect of sodium nitrite on corrosion of lead in 0.1 M sodium hydroxide solution
( Council of Scientific and Industrial Research , 1988 , Article)The effect of NaNO2 as an inhibitor for corrosion of lead in 0.1 M NaOH solution has been investigated at different temperatures using the Tafel plot technique. The concentrations of NaNO2 employed are in the range 1-5×10-5. ... -
Effect of octylphenol polyethylene oxide on the corrosion inhibition of steel in 0.5 M H2SO4
( Elsevier , 2004 , Article)A non-ionic surfactant, octylphenol polyethylene oxide (OPPEO), was evaluated as an inhibitor for corrosion of low-carbon steel in 0.5M H 2SO4. Potentiodynamic and potentiostatic methods and scanning electron microscopy ... -
Inhibition of the acid corrosion of iron with haloacetic acids
( Scientific Publishers of India , 1997 , Article)The efficiency of chloro, dichloro, trichloro, bromo, and iodoacetic acids as inhibitors for acid corrosion of iron was studied using polarization technique. A significant retardation of the corrosion rate is observed in ...
