Browsing Chemistry & Earth Sciences by Title
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Chemical survey of some plants Growing in Qatar
(1989 , Other)Fifty one plants growing in Qatar, belonging to thirty families, were surveyed for alkaloids, anthraquinones, coumarins, flavonoids, tannins and saponins. The medicinal uses of these plants arereported. -
Chemical, Electrochemical, and Surface Study on Microbial Attack of CoCrMo Dental Alloy by Streptococcus mutans
( Springer Science and Business Media Deutschland GmbH , 2021 , Article)Abstract: In this investigation, the objective of our research was to evaluate the influence of the corrosion behavior of CoCrMo dental alloy in the presence of the oral bacteria Streptococcus mutans (Streptococcus mutans) ... -
Chemistry and antioxidant properties of titanium(IV) complexes
( Kluwer Academic Publishers , 2015 , Article)The synthesis of titanium(IV) complexes with biologically active hydrazide ligands has been carried out. The complexes were characterized by spectroscopic methods (IR, <sup>1</sup>H NMR and <sup>13</sup>C NMR), elemental ... -
Chemistry, alpha-glucosidase and radical scavenging properties of uranyl(VI) hydrazide complexes
( Bentham Science Publishers , 2019 , Article)Background: Antioxidant, anti-inflammatory, antiviral and antitumoral activities among others are essential characteristics in the development of novel therapeutic compounds. Acid hydrazides can form complexation with ... -
Chromium removal from tannery wastewater by electrocoagulation: Optimization and sludge characterization
( MDPI AG , 2020 , Article)The treatment of tannery effluent is of great interest as it contains a complexmixture ofpollutants, primarily chromium. The disposal of this wastewater can have adverse effects on the environment and aquatic life, which ... -
Chronostratigraphy and geochemical characterization of volcanic rocks from the Hormuz Complex: Constraints from the Halul Island, The State of Qatar
( sultan qaboos university , 2003 , Article)Geochemical and Sr-Nd isotopic data are reported for volcanic rocks in the Hormuz Complex, Halul Island, Eastern Qatar. Two groups of volcanic rocks are distinct in their geochemical characteristics. Group 1 samples have ... -
CMOS compatible silicon slot ring resonator sensor
( SPIE , 2019 , Conference Paper)We propose a fully CMOS compatible optical sensor based on the ring resonator mechanism. The waveguide structure of the sensor utilizes the silicon on insulator slot waveguide configuration. The analyte fills the slot and ... -
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 ... -
Cobalt phthalocyanine as a novel molecular recognition reagent for batch and flow injection potentiometric and spectrophotometric determination of anionic surfactants
( Elsevier B. V. , 2008 , Article)Cobalt(II) phthalocyanine [Co(II)Pc] is used as both an ionophore and chromogen for batch and flow injection potentiometric and spectrophotometric determination of anionic surfactants (SDS), respectively. The potentiometric ... -
Colorimetry-Based Detection of Biomarkers in Exhaled Breath for Predicting COVID-19 Disease
( Qatar University Press , 2021 , Poster)Exhaled breath is the biological medium that carries relevant medical information and can be used to analyse biomarkers characteristic for detecting abnormal health status. Thus, by systematically analysing the interaction ... -
Combined experimental and computational investigations of the fluorosolvatochromism of chromeno[4,3-b]pyridine derivatives: Effect of the methoxy substitution
( Elsevier , 2023 , Article)Extensive research has been conducted on the spectral properties of chromeno[4,3-b]pyridine derivatives, owing to their potential applications in sensing, optoelectronic devices, and drug discovery. This study presents a ... -
Combining bioadsorption and photoelectrochemical oxidation for the treatment of soil-washing effluents polluted with herbicide 2,4-D
( John Wiley and Sons Ltd , 2017 , Article)BACKGROUND: The aim of this work is to evaluate the effectiveness of complete treatment of soil spiked with 2,4-D, consisting of soil washing, followed by bioadsorption with activated sludge and electrochemical and ... -
A Comparison between Different Agro-wastes and Carbon Nanotubes for Removal of Sarafloxacin from Wastewater: Kinetics and Equilibrium Studies
( Multidisciplinary Digital Publishing Institute (MDPI) , 2020 , Article)In the current study, eco-structured and efficient removal of the veterinary fluoroquinolone antibiotic sarafloxacin (SARA) from wastewater has been explored. The adsorptive power of four agro-wastes (AWs) derived from ... -
Competitive adsorptive removal of promazine and promethazine from wastewater using olive tree pruning biochar: operational parameters, kinetics, and equilibrium investigations
( Springer Nature , 2023 , Article)This research aims to remove two phenothiazines, promazine (PRO) and promethazine (PMT), from their individual and binary mixtures using olive tree pruning biochar (BC-OTPR). The impact of individual and combinatory effects ... -
Computational Calculation of Midpoint Potential of Quinones in the A1 Binding Site of the Photosystem I
( Hamad bin Khalifa University Press (HBKU Press) , 2016 , Conference Paper)Quinones are oxidants; colorants; electrophiles and involved in the electron transfer process of important biological functions such as photosynthesis, respiration, phosphorylation etc. In earth, photosynthesis is the main ... -
Computational exploration of the effect of molecular medium on the tautomerization of azo prodrug of 5-aminosalicylic acid
( Elsevier Inc. , 2019 , Article)The characterization of potential tautomerization of pharmaceutical materials has significant importance. Sulfasalazine (SSZ) is a prodrug that bears 5-aminosalicylic acid and pyridylamino-sulfonyl-phenyl moieties bridged ... -
Computational insights into the photocyclization of diclofenac in solution: Effects of halogen and hydrogen bonding
( Royal Society of Chemistry , 2016 , Article)The effects of noncovalent interactions, namely halogen and hydrogen bonding, on the photochemical conversion of the photosensitizing drug diclofenac (DCF) in solution were investigated computationally. Both explicit and ... -
Computational Insights on the Electrocatalytic Behavior of [Cp*Rh] Molecular Catalysts Immobilized on Graphene for Heterogeneous Hydrogen Evolution Reaction
( Springer Nature , 2020 , Article)The heterogeneous metal-based molecular electrocatalyst can typically exhibit attractive features compared to its homogeneous analogue including recoverability and durability. As such, it is necessary to evaluate the ... -
Computational molecular perspectives on the interaction of propranolol with ?-cyclodextrin in solution: Towards the drug-receptor mechanism of interaction
( Elsevier B.V. , 2017 , Article)Elucidating the mechanism of interaction between a drug molecule and its corresponding receptors is of great importance. It had been demonstrated that Propranolol as a β-blocker interacts with β-adrenoreceptors through ... -
Computational Studies on the Thermodynamic and Kinetic Parameters of Oxidation of 2-Methoxyethanol Biofuel via H-Atom Abstraction by Methyl Radical
( Nature Publishing Group , 2019 , Article)In this work, a theoretical investigation of thermochemistry and kinetics of the oxidation of bifunctional 2-Methoxyethanol (2ME) biofuel using methyl radical was introduced. Potential-energy surface for various channels ...