Central Laboratories Unit Research: المرسلات الحديثة
السجلات المعروضة 41 -- 60 من 97
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Concentrations of essential and toxic elements and health risk assessment in brown rice from Qatari market
( Elsevier , 2022 , Article)Twenty-two brown rice varieties available in the Qatari market were analyzed for essential and toxic elements by ICP-MS. Found concentrations (µg/kg) were: As: 171 ± 78 (62–343), Cd: 42 ± 60 (4–253), Cr: 515 ± 69 (401–639), ... -
Insights into the generation of hydroxyl radicals from H2O2 decomposition by the combination of Fe2+ and chloranilic acid
( Springer , 2021 , Article)In this work, the degradation of chloranilic acid (CAA) by chemical oxidation with H2O2 alone and in the presence of ferrous iron Fe2+ catalyst was investigated in order to improve our understanding on the novel metal-independent ... -
Investigation on the effect of LiTFSI salt on PVDF-based Solid Polymer Electrolyte Membranes for Lithium-Ion Batteries
( Qatar University Press , 2021 , Poster)Solid polymer electrolytes provide an alternative approach to providing improved safety whilst concurrently acting as a performance enhanced separator within Lithium-ion batteries (LIBs). This investigation studies the ... -
Detecting Organic Nitrogen with 1H-15N HMBC Spectra
( Qatar University Press , 2021 , Poster)NMR spectroscopy has been the most important tool for organic chemistry research, providing detailed structure information. While 1H and 13C NMR spectra were frequently measured, 15N NMR spectra were relatively rare, even ... -
Spectrophotometric Determination of the Honey Bee Quality
( Qatar University Press , 2021 , Poster)Honey produced by bees from nectar in flowers and plants, is an aqueous supersaturated sugar solution, mainly monosaccharide (fructose and glucose) (70%–80%) and water (10%–20%). 5-Hydroxymethylfurfural (5-HMF) content in ... -
One minute microwave synthesis of [O2N-Ph-CH2-Py = N(Me)2]+[Cl]− ionic liquid: XRD/HSA-interactions, physicochemical, optical, thermal and A DFT/TD-DFT analysis
( Elsevier , 2021 , Article)1-(4-nitrobenzyl)-4-dimethylaminopyridinium chloride, [O2N-Ph-CH2-Py = N(Me)2]+[Cl]−, was made available in good yield and within one minute using microwave assisted reaction (MW). The ionic liquid product resonance structure ... -
Isolation, screening and activity of hydrocarbon-degrading bacteria from harsh soils
( Avestia Publishing , 2016 , Conference Paper)The study of microbial communities in relation to their ecology, interaction, and genetics must be covered in Qatar with special soil, weather and water. Microorganisms of an environment never having been exposed to such ... -
Ultra-trace determination of 90Sr, 137Cs, 238Pu, 239Pu, and 240Pu by triple quadruple collision/reaction cell-ICP-MS/MS: Establishing a baseline for global fallout in Qatar soil and sediments
( Elsevier Ltd , 2016 , Article)The development of practical, fast, and reliable methods for the ultra-trace determination of anthropogenic radionuclides 90Sr, 137Cs, 238Pu, 239Pu, and 240Pu by triple quadruple collision/reaction cell inductively coupled ... -
Selection of Bacillus spp. with decontamination potential on multiple Fusarium mycotoxins
( Elsevier , 2021 , Article)Along with Aspergillus and Penicillium spp., mycotoxins produced by Fusarium species are important contaminants in food and feed industry. This study was designed to investigate the biodegradation potential of a collection ... -
Ecological and health risks assessment of potentially toxic metals and metalloids contaminants: A case study of agricultural soils in Qatar
( MDPI , 2021 , Article)© 2021 by the authors. Licensee MDPI, Basel, Switzerland. In recent years, Qatar has witnessed exponential growth in the human population, urbanization, and increased anthropogenic activities, including agriculture. ... -
Application of yeasts and yeast derivatives for the biological control of toxigenic fungi and their toxic metabolites
( Elsevier , 2021 , Article)Mycotoxins, the metabolites of toxigenic fungi are important contaminants of food and agriculture industry throughout the world. Among the different strategies to minimize the mycotoxins synthesis and decontamination of ... -
Bacillus thuringiensis strains isolated from Qatari soil, synthesizing δ-endotoxins highly active against the disease vector insect Aedes aegypti Bora Bora
( Elsevier , 2020 , Article)© 2020 Bacillus thuringiensis (Bt) is a Gram-positive soil bacterium that has been recognized as an effective bioinsecticide active against plant, animal and human pathogenic and disease vector insects. During its sporulation ... -
Synthesis of N -Heterocycles via Transition-Metal-Catalyzed Tandem Addition/Cyclization of a Nitrile
( Thieme Gruppe , 2020 , Article)The diverse methodologies to synthesize N -heterocycles through transition-metal-catalyzed cascade addition/cyclization of a nitrile are discussed in this review. Aspects relating to three types of transition-metal-catalyzed ... -
Copper-Catalyzed Dual Cyclization for the Synthesis of Quinindolines
( MDPI , 2020 , Article)A synthetic approach to quinindoline derivatives by the Cu-catalyzed dual cyclization has been developed. This catalytic reaction is a practical method for the systematic synthesis of quinindoline core structure, which ... -
Energy recovery and nutrients recycling from municipal sewage sludge
( Elsevier , 2020 , Article)Hydrothermal Liquefaction (HTL) could be a promising and better alternative to other techniques for energy recovery from municipal sewage sludge (MSS). However, the nutrients (i.e., N, and P) recovery potential from the ... -
Rare earth elements and 143Nd/144Nd isotope ratio measurements using tandem ICP-CRC-MS/MS: Characterization of date palm (: Phoenix dactylifera L.)
( Royal Society of Chemistry , 2017 , Article)Herein, tandem inductively coupled plasma mass spectrometry with a collision/reaction cell (ICP-CRC-MS/MS) was used to accurately characterize the rare earth element (REE) pattern and the radiogenic isotope ratios of ... -
Influence of nitrogen doping on the electrocatalytic activity of Ni-incorporated carbon nanofibers toward urea oxidation
( Elsevier Ltd , 2017 , Article)Overall, boosting the formation of the active NiOOH layer distinctly improves the electro catalytic activity of nickel-based materials. Moreover, due to the adsorption capacity, the carbonaceous supports improve the ... -
Microplastics in coastal environments of the Arabian Gulf
( Elsevier Ltd , 2017 , Article)Eight sandy beaches along the coastline of Qatar and four sea surface stations on the eastern coast, adjacent to Doha Bay, were surveyed between December 2014 and March 2015. Microplastics, mainly low density polyethylene ... -
Engineering of nickel based catalyst for direct urea fuel cell-energy from municipal liquid waste (Mlw)
( Nova Science Publishers, Inc. , 2019 , Book chapter)Alternatives to conventional fuels are required to meet the global energy demand, urea is a relatively non-toxic crystalline substance that is perhaps best known for its presence in municipal liquid waste (MLW) and ... -
Synthesis of thioether-functional poly(olefin)s via ruthenium-alkylidene initiated ring-opening metathesis polymerization
( John Wiley and Sons Inc. , 2019 , Article)Ring-opening metathesis polymerization (ROMP) of thioether-derived oxanorbornene imide (M1) and its copolymerization with various cycloolefin comonomers such as cyclopentene (M2), cyclopent-3-en-1-ol (M3), cycloheptene ...