Central Laboratories Unit: Recent submissions
Now showing items 81-100 of 126
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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 ... -
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 ... -
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 ... -
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 ... -
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 , 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 ... -
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 ... -
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 ... -
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 ... -
One-Pot Tandem Ring-Opening and Ring-Closing Metathesis Polymerization of Disubstituted Cyclopentenes Featuring a Terminal Alkyne Functionality
( American Chemical Society , 2020 , Article)Tandem metathesis polymerization of terminal alkynes with a small functional ring-size cycloalkene remains a challenge. A series of 1-propargyl-1′-carboxylate ester monomers M1-M4 derived from 3-cyclopentene initiated by ... -
Synthesis of thioether-functional poly(olefin)s via ruthenium-alkylidene initiated ring-opening metathesis polymerization
( Wiley , 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 ... -
Electrolytic oxidation as a sustainable method to transform urine into nutrients
( MDPI , 2020 , Article)© 2020 by the authors. In this work, the transformation of urine into nutrients using electrolytic oxidation in a single-compartment electrochemical cell in galvanostatic mode was investigated. The electrolytic oxidation ... -
A combined pathway for the synthesis of nitidine family alkaloids
( Springer Netherlands , 2019 , Article)Three related alkaloids, oxynitidine, nitidine and 5,6-dihydronitidine, have been afforded by the new synthetic protocols. In this approach, the Ni-catalyzed annulation reaction is indicated as the key step to construct ... -
Database Facilitated Screening with NMR Spectroscopy Analysis for Drug Detection
( IEEE , 2019 , Conference)© 2019 IEEE. Drug detection plays the key role in the enforcement of drug regulations. Various detection methods for them are thus developed. However, in most investigations, the most time-consuming and tedious part is not ... -
Investigation of Biochemical Alterations in Ischemic Stroke Using Fourier Transform Infrared Imaging Spectroscopy-A Preliminary Study.
( MDPI , 2019 , Article)Brain damage, long-term disability and death are the dreadful consequences of ischemic stroke. It causes imbalance in the biochemical constituents that distorts the brain dynamics. Understanding the sub-cellular alterations ... -
Influence of temperature, salinity and Mg:Ca ratio on microbially-mediated formation of Mg-rich carbonates by Virgibacillus strains isolated from a sabkha environment.
( Nature Research , 2019 , Article)Studies have demonstrated that microbes facilitate the incorporation of Mg into carbonate minerals, leading to the formation of potential dolomite precursors. Most microbes that are capable of mediating Mg-rich carbonates ... -
Synthesis of 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles and features of their NMR spectra
( Wiley , 2019 , Article)Two different methods leading to 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles were investigated. Reactions of 3-aminocrotonirile with substituted salicylaldehydes provided 5-oxo-5H-chromeno[3,4-c]pyridine-1-carbonitriles ... -
Catalytic Degradation of 4-Ethylpyridine in Water by Heterogeneous Photo-Fenton Process
( MDPI , 2019 , Article)In this work, the degradation of 4-ethylpyridine (4EP) in water by a heterogeneous photo-Fenton process (H2O2/Fe3O4/ultraviolet irradiation (UV)) was investigated. More rapid and effective 4EP degradation was obtained with ... -
Ultra-trace Measurements of 210Pb in natural occurring radioactive materials by ICP-MS
( Elsevier , 2010 , Article)Collision cell inductively coupled plasma mass spectrometry (CC-ICP-MS) was investigated as a possible alternative to nuclear analytical techniques for the determination of 210Pb. The formation of isobaric and polyatomic ...
