Chemistry & Earth Sciences: Recent submissions
Now showing items 421-440 of 614
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Application of a definitive screening design for the synthesis of a charge-transfer complex of sparfloxacin with tetracyanoethylene: Spectroscopic, thermodynamic, kinetics, and DFT computational studies
( Royal Society of Chemistry , 2019 , Article)Herein, a spectrochemical approach was adopted to study the charge-transfer (CT) complexation of sparfloxacin (SFX) with tetracyanoethylene (TCNE). In this study, a three-level design of experiments (DOE) involving a ... -
Characterization of GRE pipes fatigue failure subjected to HTHP loading conditions
( American Society of Mechanical Engineers (ASME) , 2019 , Conference)GRE composite pipes are a great substitute for Carbon steel, however, obstacles of introducing GRE composite pipes into oil and gas transmission lines have been primarily related to inadequate testing data to maintain ... -
Drillstring Failure - Identification, Modeling, and Experimental Characterization
( American Society of Mechanical Engineers (ASME) , 2019 , Article)Drilling is one of the costliest and risky activities in oil and gas industry due to complexity of interactions with downhole formation. Under such conditions, the uncertainty of drillstring behavior increases, and hence, ... -
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 ... -
Screening and optimization of samarium-assisted complexation for the determination of norfloxacin, levofloxacin and lomefloxacin in their corresponding dosage forms employing spectrofluorimetry
( Elsevier B.V. , 2019 , Article)Multivariate strategy was applied for setting a fluorescent technique for the determination of three fluoroquinolones: norfloxacin (NOR), levofloxacin (LEV) and lomefloxacin (LOM) in their pure powder and dosage forms. ... -
Oxidative degradation of tannic acid in aqueous solution by UV/S2O8 2- and UV/H2O2/Fe2+ processes: A comparative study
( MDPI AG , 2019 , Article)Tannic acid (TA) is a major pollutant present in the wastewater generated from vegetable tanneries process and food processing. This work studied TA degradation by two advanced oxidation processes (APOs): UV irradiation ... -
TDDFT Investigation of the hybrid organic inorganic perovskite: CH 3 NH 3 PbC 3
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Conference)Hybrid organic-inorganic metal perovskites (chemical formula: ABX3, A-organic cation, B-metal ion, X-halide) are the latest advancement for increasing efficiency in thin-film solar cells or Dye Solar Cells (DSC). They have ... -
Secretory laccase from pestalotiopsis species CDBT-F-G1 fungal strain isolated from high altitude: Optimization of its production and characterization
( MDPI AG , 2019 , Article)Microorganisms producing laccases may be used for the pretreatment of lignocellulosic biomass to recover fermentable sugar. Very few fungi and other microbes growing in high altitudes have been tested for this purpose. As ... -
Effect of pH on acidic and basic chelating agents used in the removal of iron sulfide scales: A computational study
( Elsevier B.V. , 2019 , Article)Iron sulfide scale is a major challenge in the upstream section of the oil and gas industry. It is responsible for precipitate formation in tubulars, and it damages equipment. This leads to a loss in production. Mechanical ... -
Synthesis, physico-chemical, hirschfield surface and DFT/B3LYP calculation of two new hexahydropyrimidine heterocyclic compounds
( Iranian Institute of Research and Development in Chemical Industries , 2019 , Article)Two new hexahydropyrimidine compounds were prepared in high yield by condensation of an equimolar amount of 1,3-diamine with 2-dipyridylketone at room temperature in dichloromethane. The desired hexahydropyrimidine structures ... -
UV–Vis, IR spectra, mass spectrometry and thermal studies of charge transfer complexes formed in the reaction of 1, 4, 8, 11-tetraazacyclotetradecane with π-electron acceptors
( Elsevier B.V. , 2019 , Article)The solid charge-transfer (CT) molecular complexes formed in the reaction of the electron donor 1,4,8,11-tetraazacyclotetradecane (TACTD) with the π-electron acceptors 2,4,6-tetrafluoro-1,4-benzoquinone (TFQ), 2,3-dichlo ... -
Enhancement of Ethanol Production in Electrochemical Cell by Saccharomyces cerevisiae (CDBT2) and Wickerhamomyces anomalus (CDBT7)
( Frontiers Media S.A. , 2019 , Article)Bioethanol (a renewable resource), blended with gasoline, is used as liquid transportation fuel worldwide and produced from either starch or lignocellulose. Local production and use of bioethanol supports local economies, ... -
Recycling of Date Pits Into a Green Adsorbent for Removal of Heavy Metals: A Fractional Factorial Design-Based Approach
( Frontiers Media S.A. , 2019 , Article)Date pits (DPs) have been recycled into a low-cost adsorbent for removing of selected heavy metals (HMs) from artificially contaminated aqueous solutions. Adsorption of targeted HMs, both by raw date pits (RDP) and burnt ... -
Sub-Femtojoule Hybrid Plasmonic Optical Modulator
( Institute of Electrical and Electronics Engineers Inc. , 2019 , Article)A highly compact optical modulator is proposed and analyzed. The modulator is based on the hybrid plasmonic waveguide platform. The structure of the modulator is built from silicon, silver, and electro-optical polymer ... -
Discrimination of breast cancer from benign tumours using Raman spectroscopy
( Public Library of Science , 2019 , Article)Breast cancer is the most common cancer among women worldwide, with an estimated 1.7 million cases and 522,000 deaths in 2012. Breast cancer is diagnosed by histopathological examination of breast biopsy material but this ... -
Design and optimization of a luminescent Samarium complex of isoprenaline: A chemometric approach based on Factorial design and Box-Behnken response surface methodology
( Elsevier B.V. , 2019 , Article)A chemometrically optimized procedure has been developed for the determination of isoprenaline (ISO) in the parent substance as well as in its respective pharmaceutical preparation. It is worth mentioning that although ... -
Role of organic cation in modern lead-based perovskites
( Elsevier Ltd , 2019 , Article)Hybrid organic-inorganic metal perovskites (ABX3, A- organic cation, B-metal ion, X-halide ion) have shown significant potential as thin-film solar cells or Dye solar cells (DSC) materials. Using a time-dependent density ... -
Investigation of the effect of PD-L1 blockade on triple negative breast cancer cells using fourier transform infrared spectroscopy
( MDPI AG , 2019 , Article)Interactions between programmed death-1 (PD-1) with its ligand PD-L1 on tumor cells can antagonize T cell responses. Inhibiting these interactions using immune checkpoint inhibitors has shown promise in cancer immunotherapy. ... -
Precise fabrication of porous one-dimensional gC3N4 nanotubes doped with Pd and Cu atoms for efficient CO oxidation and CO2 reduction
( Elsevier B.V. , 2019 , Article)Rational design of graphitic carbon nitride nanostructures (gC3N4) is vital for various catalytic applications. Herein, we synthesized porous gC3N4 nanotubes (gC3N4NTs) doped with Pd and Cu (Pd/Cu/gC3N4NTs) via the consecutive ... -
Novel Cu (II) and Zn (II) complexes of 8-hydroxyquinoline derivatives as effective corrosion inhibitors for mild steel in 1.0?M HCl solution: Computer modeling supported experimental studies
( Elsevier B.V. , 2019 , Article)In this work, we have synthesized and characterized novel complexes of copper (II) and zinc (II). These complexes were obtained by reacting of 5-azidomethyl-8-hydroxyquinoline with copper chloride dihydrate and zinc chloride ...
