تصفح Chemistry & Earth Sciences حسب العنوان
السجلات المعروضة 1 -- 20 من 586
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3-Aminopyridine Salicylidene: A Sensitive and Selective Chemosensor for the Detection of Cu(II), Al(III), and Fe(III) with Application to Real Samples
( MDPI , 2022 , Article)Interest in developing selective and sensitive metal sensors for environmental, biological, and industrial applications is mounting. The goal of this work was to develop a sensitive and selective sensor for certain metal ... -
8-hydroxyquinoline grafted triazole derivatives as corrosion inhibitors for carbon steel in H2SO4 solution: Electrochemical and theoretical studies
( Springer Science and Business Media Deutschland GmbH , 2021 , Article)The inhibition capacity of carbon steel (CS) in 0.5M H2SO4 by three 8-hydroxyquinoline grafted triazole derivatives (EHTC, AHTC, and MHTC) have been investigated using electrochemical impedance spectroscopy (EIS), ... -
A computational study on molecular structure and stability of tautomers of dipyrrole-based phenanthroline analogue
( Elsevier B.V. , 2018 , Article)This work reports structure and stability of different tautomers of a newly-designed analogue of 1,10-phenanthroline-5,6-dione (the di-keto structure (DK) derived from 1H,8H-pyrrolo[3,2-g]indole (PI)) using quantum chemical ... -
A Cross-Coupling Approach to Amide Bond Formation from Esters
( American Chemical Society , 2017 , Article)A palladium-catalyzed cross-coupling between aryl esters and anilines is reported, enabling access to diverse amides. The reaction takes place via activation of the C-O bond by oxidative addition with a Pd-NHC complex, ... -
A NEW DEPOSITIONAL MODEL AND SEQUENCE STRATIGRAPHIC INTERPRETATION FOR THE UPPER JURASSIC ARAB "D" RESERVOIR IN QATAR
( Blackwell Publishing Ltd , 2001 , Article)Deposition of the Arab Formation on the Arabian Plate followed a eustatic sea-level high during the Oxfordian that deposited the open-marine shelfal carbonates of the Hanifa and Jubaila Formations. Oolite/peloidal shoals ... -
A New Poly (Vinyl Chloride) Matrix Membrane Electrode for Manual and Flow Injection Determination of Pilocarpine in Some Pharmaceutical Preparations
( Taylor and Francis Inc. , 1994 , Article)A novel pilocarpinium ion selective membrane electrode is prepared, characterized and used in pharmaceutical analysis. The electrode system incorporates a PVC membrane with pilocarpine-reineckatc ion pair complex as an ... -
A simple model for cell type recognition using 2D-correlation analysis of FTIR images from breast cancer tissue
( Elsevier B.V. , 2018 , Article)Breast cancer is the second most common cancer after lung cancer. So far, in clinical practice, most cancer parameters originating from histopathology rely on the visualization by a pathologist of microscopic structures ... -
A study of low-temperature CO oxidation over mesoporous Cuo-TiO2 nanotube catalysts
( MDPI AG , 2017 , Article)Supported copper oxide nanoparticles have attracted considerable attention as active and non-precious catalysts for many catalytic oxidation reactions. Herein, mesoporous xCuO-TiO2 nanotube catalysts were fabricated, and ... -
A Synergistic Approach to Develop Sustainable Scale Inhibitors Combining Amino Acids and Polyphosphates
( Springer Nature , 2024 , Article)Applying conventional antiscalants, e.g., polyphosphates, may bring about environmental and health concerns, warranting the application of green compounds. This work reports the application of amino acids such as glutamic ... -
Ab initio study on the formation of triiodide CT complex from the reaction of iodine with 2,3-diaminopyridine
( Elsevier , 2010 , Article)The charge transfer (CT) interaction between iodine and 2,3-diaminopyridine (DAPY) has been thoroughly investigated via theoretical calculations. A Hartree–Fock, 3-21G level of theory was used to optimize and calculate the ... -
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 ... -
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 ... -
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 ... -
Additive manufacturing of Ti-alloy: Thermal analysis and assessment of properties
( SAGE Publications Inc. , 2020 , Article)In this study, 3D printing of Ti6Al4V alloy is realized and the characteristics of the printed layer are examined. The morphological structures and metallurgical changes in the printed layer are assessed. Temperature and ... -
Addressing scale-up challenges and enhancement in performance of hydrogen-producing microbial electrolysis cell through electrode modifications
( Elsevier , 2022 , Article Review)Bioelectrohydrogenesis using a microbial electrolysis cell (MEC) is a promising technology for simultaneous hydrogen production and wastewater treatment which uses electrogenic microbes. Microbial activity at the anode and ... -
Adhesion characteristics of solution treated environmental dust
( Nature Research , 2020 , Article)Environmental dust is modified towards self-cleaning applications under the gravitational influence. Dust particles are collected in the local area of Dammam in Saudi Arabia and they are treated with a dilute hydrofluoric ... -
Adsorption and recovery of lithium ions from groundwater using date pits impregnated with cellulose nanocrystals and ionic liquid
( Elsevier , 2022 , Article)The study aims to prepare a novel low-cost and environmentally friendly adsorbent by using date pits (DP) impregnated with cellulose nanocrystals (CNCs) and ionic liquid (IL), named IL-CNC@DP. The batch adsorption of lithium ... -
Adsorption characteristics of pristine and magnetic olive stones biochar with respect to clofazimine
( Multidisciplinary Digital Publishing Institute (MDPI) , 2021 , Article)Olive stone biochars (OSBC), both pristine and following magnetization (MAG–OSBC), were utilized as eco‐friendly and cost‐effective sorbents for the antituberculosis, clofazimine (CLOF). Morphologies, textures, surface ... -
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 ... -
Adsorption of textile dye onto modified immobilized activated alumina
( Elsevier Science B.V. , 2016 , Article)The study describes the synthesis of modified immobilized activated alumina (MIAA) and its application for the removal of textile dye from aqueous media. Immobilization was carried out by using the sol–gel method while ...
