Chemistry & Earth Sciences: المرسلات الحديثة
السجلات المعروضة 401 -- 420 من 614
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Rice is a potential dietary source of not only arsenic but also other toxic elements like lead and chromium
( Elsevier B.V. , 2017 , Article)Rice is a staple food and a good source of nutrition for half of the earth’s population including Middle Eastern countries. However, rice may accumulate hazardous levels of toxic elements. In KSA, rice is imported from ... -
Hybrid plamonic conductor-gap-silicon microring-on-disks electro-optic modulator
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Conference)In this work, we propose a novel design of a double microring-on-disk electro-optic modulator based on hybrid plasmonic conductor-gap-silicon platform utilizing the electromagnetic induced transparency response. The modulator ... -
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 ... -
Silver Nanoparticles-Decorated Titanium Oxynitride Nanotube Arrays for Enhanced Solar Fuel Generation
( Nature Publishing Group , 2017 , Article)We demonstrate, for the first time, the synthesis of highly ordered titanium oxynitride nanotube arrays sensitized with Ag nanoparticles (Ag/TiON) as an attractive class of materials for visible-light-driven water splitting. ... -
An efficient eco advanced oxidation process for phenol mineralization using a 2D/3D nanocomposite photocatalyst and visible light irradiations
( Nature Publishing Group , 2017 , Article)Nanocomposites (CNTi) with different mass ratios of carbon nitride (C3N4) and TiO2 nanoparticles were prepared hydrothermally. Different characterization techniques were used including X-ray diffraction (XRD), UV-Vis diffuse ... -
Effects of combined calcium hypochlorite and chlorine dioxide on drinking water quality in Qatar and disinfection by-products formation
( Desalination Publications , 2017 , Article)Chlorite, chlorate, bromate and trihalo methanes (THMs) are included in WHO guidelines for drinking water quality. This study examined dosing different chlorine concentrations as calcium hypochlorite (Ca(ClO)2 ) to water ... -
Vanadium(V) complexes with hydrazides and their spectroscopic and biological properties
( Springer Netherlands , 2017 , Article)The present study explores the synthesis and inhibitory potential of vanadium(V) complexes of hydrazides (1c-12c) against oxidative enzymes including xanthine oxidase and lipoxygenase (LOX). In addition, non-enzymatic ... -
Synthesis and physicochemical studies of perovskite manganite La0.8Ca0.2Nn1 xCoxO3(0?x?0.3)
( Seoul National University 501-321 , 2017 , Article)The physicochemical properties of La0.8Ca0.2Mn1xCoxO nanopowders as a function of Co content (x) have been investigated. La0.8Ca0.2Mn1xCoxO nanopowders were synthesized by sol-gel method and morphologically and structurally ... -
Electro-Optic Plasmonic Modulator with Direct Coupling to Silicon Waveguides
( Institute of Electrical and Electronics Engineers Inc. , 2017 , Article)A novel plasmonic Mach-Zehnder interferometer is proposed with a nonlinear polymer. Orthogonal junction coupling between silicon and plasmonic waveguides is exploited to omit the need for tapers, and in turn, reduce the ... -
Rational one-step synthesis of porous PtPdRu nanodendrites for ethanol oxidation reaction with a superior tolerance for CO-poisoning
( Royal Society of Chemistry , 2017 , Article)Precise fabrication of porous ternary Pt-based nanodendrites is very important for electrochemical energy conversion owing to high surface area and great molecular accessibility of these nanodendrites. Herein, PtPdRu porous ... -
Enhancing the performance of electro-peroxone by incorporation of UV irradiation and BDD anodes
( Taylor and Francis Ltd. , 2017 , Article)In this work, the treatment of 4-nitrophenol (NP) in water by ozonation, electrolysis, electro-peroxone (EP), and photo-electro-peroxone (PEP) processes was investigated. PEP process is based on the combination of ozonation, ... -
Potato Peels as an Adsorbent for Heavy Metals from Aqueous Solutions: Eco-Structuring of a Green Adsorbent Operating Plackett-Burman Design
( Hindawi Limited , 2019 , Article)Treatment of wastewater is becoming a concern of an increasing prominence. Trace amounts of toxic metalloids and heavy metals (HMs) would contaminate large volumes of water. Being present as traces, removal of these ... -
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 ... -
Natural clay-supported palladium catalysts for methane oxidation reaction: Effect of alloying
( Royal Society of Chemistry , 2019 , Article)The catalytic combustion of methane (CCM) has been extensively studied owing to the wide use of methane in motor vehicles and power generation turbines. However, the absence of polarizability and the high C-H bond strength ... -
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 ... -
CMOS compatible silicon slot ring resonator sensor
( SPIE , 2019 , Conference)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 ... -
Degradation of hydroxychloroquine by electrochemical advanced oxidation processes
( Elsevier , 2020 , Article)In this work, the degradation of hydroxychloroquine (HCQ) drug in aqueous solution by electrochemical advanced oxidation processes including electrochemical oxidation (EO) using boron doped diamond (BDD) and its combination ... -
Inhibition of mild steel corrosion in CO2 and H2S-saturated acidic media by a new polyurea-based material
( Wiley-VCH Verlag , 2019 , Article)Oil well acidizing is a common practice used to boost oil well productivity in the industry. This practice, however, exposes the mild steel components of the wells to extremely harsh corrosive environments. Under such ... -
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 ... -
Utilization of 7-chloro-4-nitrobenzo-2-oxa-1,3-diazole (NBD-Cl) for spectrochemical determination of L-ornithine: A multivariate optimization-assisted approach
( Royal Society of Chemistry , 2019 , Article)A simple and highly sensitive univariate calibration strategy based on ultraviolet-visible (UV-Vis) absorption spectroscopy and assisted by multivariate screening and optimization was utilized for the determination of ...
