Corrosion of underground pipelines in clay soil with varied soil layer thicknesses and aerations
Publication date: Available online 2 December 2019Source: Arabian Journal of ChemistryAuthor(s): Hongwei Liu, Yuning Dai, Y. Frank ChengAbstractUnderground pipelines suffer from corrosion in the soil. In this work, weight-loss testing, electrochemical measurements and surface analysis techniques were used to investigate the pipeline steel corrosion in a Regina clay soil with varied soil layer thicknesses and gassing conditions (i.e., aerobic, CO2-containing and anaerobic). Results demonstrate that the steel corrosion is dependent on the soil layer thickness, where a maximum corrosion rate is recorded under the 5 mm thick s...
Source: Arabian Journal of Chemistry - December 4, 2019 Category: Chemistry Source Type: research

Chitosan Coated Molybdenum Sulphide Nanosheet Incorporated with Tantalum oxide Nanomaterials for Improving Cancer Photothermal Therapy
Publication date: Available online 26 November 2019Source: Arabian Journal of ChemistryAuthor(s): Srinivasan Rajasekar, Esther Monisha, Shanthi Kuppusamy, Cittrarasu VetrivelAbstractIn recent years, two-dimensional nanomaterials (2D) prominent for site specific photothermal treatment (PTT), which are one of the most interesting strategy due to their maximizing cancer cell killing efficiency without the normal cells. Several robust methods are established for 2D material synthesis and improving the photothermal conversion efficiency (PCE), biocompatibility, and photostability in cancer PTT. Such preferred mechanism like nan...
Source: Arabian Journal of Chemistry - November 28, 2019 Category: Chemistry Source Type: research

Chlorophyll Triggered One-Pot Synthesis of 3,4-Dihydropyrimidin-2(1H)-ones via Photo Induced Electron transfer reaction
Publication date: Available online 22 November 2019Source: Arabian Journal of ChemistryAuthor(s): Simran Harsh, Sanjay Kumar, Rohit Sharma, Yogesh Kumar, Rupesh KumarAbstractThe photocatalytic potential of chlorophyll has been investigated for the facile synthesis of dihydropyrimidinones utilizing concentrated solar irradiation towards sustainable energy solutions. This, one-pot, multicomponent Biginelli reaction, which involves a photoinduced electron transfer (PET) mechanism, affords a green and efficient approach for the transformation of the commercial aldehydes, β-keto ester and urea into valuable 3,4-dihydropyri...
Source: Arabian Journal of Chemistry - November 22, 2019 Category: Chemistry Source Type: research

Biosynthesis of Nickel oxide Nanoparticles from Euphorbia heterophylla (L.) and their biological application
Publication date: Available online 21 November 2019Source: Arabian Journal of ChemistryAuthor(s): K. Lingaraju, H. Raja Naika, H. Nagabhushana, K. Jayanna, S. Devaraja, G. NagarajuAbstractNickel oxide Nanoparticles (NiO NPs) were synthesized from E.heterophylla (L.) leaves extract act as reducing/ capping agent by biosynthesis process. Further the synthesized NiO NPs was subjected for structural, optical and biological properties. The XRD pattern of NiO NPS exhibit face centred cubic (FCC) crystalline structure. The UV-DR spectrum of biosynthesized NiO NPs exhibited optical properties with well-defined at 321 nm and its ex...
Source: Arabian Journal of Chemistry - November 22, 2019 Category: Chemistry Source Type: research

Statistical physics modeling of water vapor adsorption isotherm into kernels of dates: Experiments, Microscopic interpretation and Thermodynamic functions evaluation
Publication date: Available online 21 November 2019Source: Arabian Journal of ChemistryAuthor(s): Haifa Alyousef, Mohamed Ben Yahia, Fatma AouainiAbstractIn this paper, water sorption isotherms into date kernels give interesting insights about the sorption mechanism. The equilibrium adsorption data expressing the change in moisture content of date kernels were collected at three different temperatures using the static gravimetric technique. The adsorption isotherm profiles demonstrated that this process was performed via an infinite number of layers. A modified form of the Brunauer, Emett and Teller (BET) model is obtained...
Source: Arabian Journal of Chemistry - November 22, 2019 Category: Chemistry Source Type: research

Quartzite an efficient adsorbent for the removal of anionic and cationic dyes from aqueous solutions
Publication date: Available online 21 November 2019Source: Arabian Journal of ChemistryAuthor(s): Shah Hussain, Noor ul Amin, Shahid Ali KhanAbstractQuartzite obtained from local source was investigated for the removal of anionic dye congo red (CR) and cationic dye malachite green (MG) as an adsorbent from aqueous solution in batch experiment. The adsorption process was studied as a function of dye concentration, contact time, pH and temperature. Adsorption process was described well by Langmuir and Freundlich isotherms. The adsorption capacity remained 666.7 mg/g for CR dye and 348.125 mg/g for MG dye. Data was analyzed t...
Source: Arabian Journal of Chemistry - November 22, 2019 Category: Chemistry Source Type: research

A spin-coated TiOx/Pt nanolayered anodic catalyst for the direct formic acid fuel cells
Publication date: Available online 18 November 2019Source: Arabian Journal of ChemistryAuthor(s): Islam M. Al-Akraa, Ahmad M. MohammadAbstractThe CO poisoning of the platinum anodic catalyst which typically functions the catalytic deterioration of the direct formic acid fuel cells could be minimized with a simple modification for Pt with titanium oxide. The fabrication scheme involved the spin-coating of a Ti precursor onto a Pt thin layer that was physically sputtered onto a Si substrate. The whole assembly was subjected to a post-annealing processing to produce the TiOx layer (60 nm) in a porous structure (mostly Anatase...
Source: Arabian Journal of Chemistry - November 19, 2019 Category: Chemistry Source Type: research

Modified QuEChERS method for phenolic compounds determination in mustard greens (Brassica juncea) using UHPLC-MS/MS
Publication date: Available online 18 November 2019Source: Arabian Journal of ChemistryAuthor(s): Antonio Eduardo Nicácio, Carina Alexandra Rodrigues, Isabel Cristina Sales Fontes Jardim, Jesuí Vergilio Visentainer, Liane MaldanerAbstractA modified QuEChERS method (Quick, Easy, Cheap, Effective, Rugged, and Safe) for the determination of fifteen phenolic compounds in mustard greens (Brassica juncea) using ultra-high-performance liquid chromatography coupled to tandem mass spectrometry (UHPLC-MS/MS) analysis was developed. The QuEChERS partitioning step and dispersive solid phase extraction (d-SPE) clean-up so...
Source: Arabian Journal of Chemistry - November 19, 2019 Category: Chemistry Source Type: research

Simultaneous adsorption of tetracycline, amoxicillin, and ciprofloxacin by pistachio shell powder coated with zinc oxide nanoparticles
Publication date: Available online 12 November 2019Source: Arabian Journal of ChemistryAuthor(s): Ahmed A. Mohammed, Tariq J. Al-Musawi, Sabreen L. Kareem, Mansur Zarrabi, Alaa M. Al-Ma'abrehAbstractA new adsorbent formed from pistachio shell powder that was coated with ZnO nanoparticles (CPS) was examined in terms of simultaneous adsorption of tetracycline (TEC), amoxicillin (AMO), and ciprofloxacin (CIP) from an aqueous solution. Initially, the characterization properties of a CPS-like surface morphology, functional groups, and structure were obtained using advanced analysis of TEM, SEM, XRD, EDS, and FT-IR. Post coating...
Source: Arabian Journal of Chemistry - November 13, 2019 Category: Chemistry Source Type: research

Polyphenylsulfone/multiwalled carbon nanotubes mixed ultrafiltration membranes: Fabrication, characterization and removal of heavy metals Pb2+, Hg2+, and Cd2+ from aqueous solutions
Publication date: Available online 11 November 2019Source: Arabian Journal of ChemistryAuthor(s): M. Chandrashekhar Nayak, Arun M. Isloor, Inamuddin, B. Lakshmi, Hadi M. Marwani, Imran KhanAbstractPolyphenylsulfone/multiwalled carbon nanotubes/polyvinylpyrrolidone/1-methyl-2-pyrrolidone mixed matrix ultrafiltration flat-sheet membranes were fabricated via phase inversion process to inspect the heavy metals separation efficacy from aqueous media. Fabricated membranes cross-sectional morphological changes and the topographical alterations were assessed with Scanning electron microscopy (SEM) and atomic force microscopy (AFM)...
Source: Arabian Journal of Chemistry - November 12, 2019 Category: Chemistry Source Type: research

Robust curcumin-mustard oil emulsions for pro to anti-oxidant modulation of graphene oxide
Publication date: Available online 9 November 2019Source: Arabian Journal of ChemistryAuthor(s): Parth Malik, Shrikant S. Maktedar, Gopal Avashthi, Tapan K. Mukherjee, Man SinghAbstractThe compositional flexibility of emulsions, via surfactant and additive choice, has been the major reason for their recognition as tuneable delivery sources for a variety of drugs. In particular, the kinetically stable nanoemulsions (NE) are preferred to minimize the toxicity extents of several poorly hydrophobic drugs through variation in their delivered extents. Inspired by these specialties, we have optimized our curcumin (curc) loaded so...
Source: Arabian Journal of Chemistry - November 9, 2019 Category: Chemistry Source Type: research

In situ synthesis and preconcentration of cetylpyridinium complexed hexaiodo platinum nanoparticles from spent automobile catalytic converter leachate using cloud point extraction
Publication date: Available online 9 November 2019Source: Arabian Journal of ChemistryAuthor(s): Aruna Jyothi Kora, K. Madhavi, N.N. Meeravali, Sunil Jai KumarAbstractIn the present study, a green chemistry based cloud point extraction (CPE) method has been developed for the in situ synthesis and preconcentration of cetylpyridinium complexed hexaiodo platinum nanoparticles (Pt-I NP) from the leachate of spent automobile catalytic converter using potassium iodide (KI) and assisted by a combination of cationic and non-ionic surfactants; cetylpyridinium bromide (CPB) and Triton X-114, respectively. The process parameters such...
Source: Arabian Journal of Chemistry - November 9, 2019 Category: Chemistry Source Type: research

HPLC-MS/MS multiclass determination of steroid hormones in environmental waters after preconcentration on the carbonaceous sorbent HA-C@silica
In this study, a sensitive and multiclass method has been developed for analysis of three families of steroid hormones, i.e. progestins, oestrogens, androgens, by SPE-HPLC-ESI-MS/MS. The extraction efficiency of thermally condensed humic acids onto silica sorbent (HA-C@silica), here for the first time studied for multiclass enrichment of these sex hormones, was tested in different environmental waters (tap and river water, urban wastewater treatment plant effluent) spiked at the nanograms per litre levels (5–1000 ng L−1). Quantitative adsorption was achieved using 200 mg sorbent for preconcentration of 250-1000...
Source: Arabian Journal of Chemistry - November 9, 2019 Category: Chemistry Source Type: research

Bioactivity and Molecular Docking of Synthesized Macromolecular Ligand and its Complex
Publication date: Available online 4 November 2019Source: Arabian Journal of ChemistryAuthor(s): Maryam Fatima, Mohd. Nadeem Bukhari, Imtiyaz Ahmad Bhatt, Ajaz Ahmad, Shahnawaz Ahmed, Athar Adil Hashmi, Liang Jiang, Shaojuan ChenAbstractThe development of drug resistant strains of the pathogenic fungi despite the availability of large number of drugs demands the development of new and more potential drug molecules. Dendrimer based drug molecules are comparatively less researched upon and a recent advancement in this field. The present study is concerned with the preparation of macromolecular ligand and its complex using et...
Source: Arabian Journal of Chemistry - November 6, 2019 Category: Chemistry Source Type: research

Inside Front Cover - Editorial Board
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): (Source: Arabian Journal of Chemistry)
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Nanoparticles: Properties, applications and toxicities
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Ibrahim Khan, Khalid Saeed, Idrees KhanAbstractThis review is provided a detailed overview of the synthesis, properties and applications of nanoparticles (NPs) exist in different forms. NPs are tiny materials having size ranges from 1 to 100 nm. They can be classified into different classes based on their properties, shapes or sizes. The different groups include fullerenes, metal NPs, ceramic NPs, and polymeric NPs. NPs possess unique physical and chemical properties due to their high surface area and nanoscale size. Thei...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

An enhanced electrocatalytic oxidation and determination of 2,4-dichlorophenol on multilayer deposited functionalized multi-walled carbon nanotube/Nafion composite film electrode
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Noha Al-Qasmi, M. Tahir Soomro, Iqbal M.I. Ismail, Ekram Y. Danish, Attieh A. Al-GhamdiAbstractThe voltammetric (CV and DPV) behavior of multi-walled carbon nanotube/Nafion composite coupled with a glassy carbon electrode was investigated for the determination of 2,4-dichlorophenol. The structural and morphological evaluation by XRD and FESEM revealed that the acid treated MWCNT retained their morphology without any structural change. The existence of the possible functional groups was investigated by FTIR and Raman spectrosco...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

The effect of Pt nanoparticles distribution on the removal of cyanide by TiO2 coated Al-MCM-41 in blue light exposure
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Mohammad W. Kadi, A. Hameed, R.M. Mohamed, Iqbal M.I. Ismail, Yaser Alangari, Hui-Ming ChengAbstractWith an aim to enhance the photocatalytic activity, Pt loaded TiO2–Al-MCM-41 catalysts with high surface area were synthesized by a multistep route. The waste of the rice processing, rice husk (RH), was used as the precursor for the extraction of silica. The diffuse reflectance and photoluminescence spectroscopy revealed the extension of the absorption edge in the visible region and exciton trapping nature of the dispersed...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Recent advances in 4-hydroxycoumarin chemistry. Part 2: Scaffolds for heterocycle molecular diversity
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Moaz M. Abdou, Rasha A. El-Saeed, Samir BondockAbstractThe present paper aims to review the synthetic applicability of 4-hydroxycoumarin in heterocyclic synthesis during the period from 1996 up to now. This compound can be used as building blocks for five, six, and seven-membered heterocycles as well as fused rings.Graphical abstract (Source: Arabian Journal of Chemistry)
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

A rapid ultrasound-promoted Horner–Wadsworth–Emmons reaction for the preparation of ferrocene derivatives. Application to ferrocene-modified ITO electrodes
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Abdelmoneim Mars, Noureddine RaouafiAbstractThe Horner–Wadsworth–Emmons reaction of ferrocenecarboxaldehyde with various phosphonate-stabilized carbanions has been performed under ultrasound irradiation. The reaction time at ambient temperature was considerably shortened (5–15 min) compared to nonsonicated conditions requiring often refluxing for 6–24 h. Control of the reaction time can be achieved by tuning the base strength in different solvents. This method was successfully applied to the p...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Comparative study on the inhibitive effect of Sulfadoxine–Pyrimethamine and an industrial inhibitor on the corrosion of pipeline steel in petroleum pipeline water
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): N.C. Ngobiri, E.E. Oguzie, N.C. Oforka, O. AkarantaAbstractThe corrosion inhibition characteristics of Sulfadoxine plus Pyrimethamine (S&P) was evaluated and compared with the inhibition performance of an industrial corrosion inhibitor (S-Ind) under anaerobic condition. Modified gravimetric and electrochemical techniques were used. The corrosion inhibition efficiencies of both S&P and S-Ind were comparable for all the techniques applied. S&P gave slightly higher inhibition efficiency, while S-Ind gave a more steady...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

The litchi (Litchi Chinensis) peels extract as a potential green inhibitor in prevention of corrosion of mild steel in 0.5 M H2SO4 solution
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): M. Ramananda Singh, Prachi Gupta, Kaushal GuptaAbstractThe corrosion inhibition of mild steel in 0.5 M H2SO4 solution by the extract of litchi peel (Litchi chinensis) was studied by weight loss method, potentiodynamics polarization and electrochemical impedance spectroscopy (EIS). The results show that the litchi peels extract acts as mixed-type inhibitor. The inhibition of corrosion is found to be due to adsorption of the extract on metal surface, which is in conformity with Langmuir’s adsorption isotherm. UV&ndash...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Synthesis of 3-(pyridine-2-yl)-4,5-dihydro-1H-pyrazole-1-thiocarboxamides and their copper(II) complexes
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Elena K. Beloglazkina, Diana D. Korablina, Nikolai I. Vorozhtsov, Ludmila A. Sviridova, Anna A. Moiseeva, Dmitry A. Skvortsov, Victor B. Rybakov, Alexander G. Majouga, Nikolai V. ZykAbstractNew organic ligands 3-(pyridine-2-yl)-4,5-dihydro-1H-pyrazole-1-thiocarboxamides (L) have been synthesized by a two or three step reaction sequence starting from substituted benzaldehydes and 2-acetyl pyridine. Copper(II) complexes with LCuCl2 composition were obtained by the reactions of these ligands with CuCl2·2H2O. The crystal st...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Thermal decomposition kinetics of some transition metal coordination polymers of fumaroyl bis (paramethoxyphenylcarbamide) using DTG/DTA techniques
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Ratiram Gomaji Chaudhary, Parvej Ali, Nilesh V. Gandhare, Jay A. Tanna, Harjeet D. JunejaAbstractIn the present work, thermal degradation behaviors of the Zn (II), Cd(II), and Hg(II) coordination polymers of fumaroyl bis (paramethoxyphenylcarbamide) (fbpmpc) have been investigated by using thermogravimetric (TG) analysis, differential thermal analysis (DTA) and derivative thermogravimetry (DTG) analysis under non-isothermal conditions in nitrogen atmosphere at multiple heating rates. TG–DTA study noteworthy inferred the ...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Design, synthesis, cytotoxicity and 3D-QSAR analysis of new 3,6-disubstituted-1,2,4,5-tetrazine derivatives as potential antitumor agents
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Álvaro Cañete-Molina, Christian Espinosa-Bustos, Marcos González-Castro, Mario Faúndez, Jaime Mella, Ricardo A. Tapia, Alan R. Cabrera, Iván Brito, Adam Aguirre, Cristian O. SalasAbstractWe synthesized two new series of 3-substituted-6-(2,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazines and analysed them for a potential role as antitumor agents. Twenty-two compounds were obtained, and four molecular structures were determined by X-ray diffraction analysis. Using flow cytometry and MTT assay, potent...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Ganoderma applanatum-mediated green synthesis of silver nanoparticles: Structural characterization, and in vitro and in vivo biomedical and agrochemical properties
This study presents the use of basidiomycete extracts as an effective platform for “green synthesis” of silver nanoparticles (AgNPs). Out of seven basidiomycete species, Ganoderma applanatum displayed the highest antimicrobial properties against the tested pathogens. Thus, G. applanatum methanol crude extract was fractionated using column chromatography, and the obtained fractions were subjected to an antimicrobial assay followed by phytochemical analyses using high-performance liquid chromatography to select the best fraction for synthesis of AgNPs. Fraction 3 displayed potent antimicrobial activities as evide...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Sorption of ofloxacin and chrysoidine by grape stalk. A representative case of biomass removal of emerging pollutants from wastewater
This study aims to evaluate the effectiveness of grape stalk as a sorbent for ofloxacin (a fluoroquinolone antibiotic) and chrysoidine (an azo-dye). The kinetic and the thermodynamic aspects of the sorption were studied. A pseudo first-order kinetic behavior is shown by both substances, though the kinetic constants of ofloxacin are almost double than those of chrysoidine. The sorption isotherms, which strictly follow the Langmuir model, show remarkable differences as a function of pH and of biomass size. The trend of Langmuir parameters, Qmax and K, as a function of pH and size, is discussed, and different binding mechanis...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Analysis of catecholamines and related compounds in one whole metabolic pathway with high performance liquid chromatography based on derivatization
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Xiao Huang, Xiao-Feng Guo, Hong Wang, Hua-Shan ZhangAbstractThe simultaneous determination of Tyr, catecholamines and their metabolites in one whole metabolic pathway using high performance liquid chromatography coupled with fluorescence detection (HPLC–FLD) based on pre-column derivatization has been achieved successfully. 1,3,5,7-Tetramethyl-8-(N-hydroxysuccinimidyl butyric ester)-difluoroboradiaza-s-indacene (TMBB-Su), a highly reactive fluorescent reagent synthesized in our previous work, was used for the labeling of...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Rutile phase nanoTiO2 as an effective heterogeneous catalyst for condensation reaction of isatin derivatives with 1,2-diaminobenzene under solvent free conditions: A greener “NOSE” approach
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Shivam Bajpai, Sundaram Singh, Vandana SrivastavaAbstractRutile phase of TiO2 nanoparticles were readily prepared and identified as an efficient heterogeneous catalyst for the synthesis of a library of quinoxaline derivatives by condensation reaction of isatin derivatives with o-phenylenediamine under solvent-free conditions. The presented method is mild, environmentally friendly, inexpensive and highly effective to give the products in good to excellent yields. The recyclability of the catalyst is another emphasis of proposed...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Synthesis, characterization and antimicrobial studies on 13-membered-N6-macrocyclic transition metal complexes containing trimethoprim
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): A.S. Stella Shalini, M. Amaladasan, N. Prasannabalaji, J. Revathi, G. MuralitharanAbstractAsymmetrical macrocyclic complexes of MnII, CoII, NiII, CuII and ZnII have been synthesized by the template process using bis(benzil)ethylenediamine as precursor. Bis(benzil)ethylenediamine reacts with transition metal chlorides and trimethoprim in a 1:1:1 molar ratio in methanol to give several solid metal complexes of the general composition [M(L)X2] (M = MnII, CoII, NiII, CuII and ZnII, L = ligand and X = ...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Nano-silica and SiO2/CaCO3 nanocomposite prepared from semi-burned rice straw ash as modified papermaking fillers
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Fatma A. Morsy, Said M. El-Sheikh, Ahmed BarhoumAbstractSilica (SiO2) nanoparticles and silica/calcium carbonate (SiO2/CaCO3) core–shell nanocomposites were prepared by sol–gel technique as fillers for papermaking application. Semi-burned rice straw ash (SBRSA), as waste material, was used to prepare the targeted fillers. Preparation of SiO2 nanoparticles and SiO2/CaCO3 nanocomposites was carried out using Na2SiO3 solution that was prepared from SBRSA and CaCO3 nanoparticles of 30–70 nm. The targeted SiO...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Photochemical studies: Chromones, bischromones and anthraquinone derivatives
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Mohamad Yusuf, Indu Solanki, Payal Jain, Rupesh KumarAbstractPhotochemical reaction is a chemical reaction initiated by the absorption of energy in the form of light resulting in different types of reaction. Chromones, bischromones and anthraquinones are the bichromophoric molecules which contain the carbonyl group and double bond in conjugation. Photochemical reactions of these compounds result in the formation of such molecules which are not obtained via conventional methods. This review article describes the photochemical t...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Applying green analytical chemistry (GAC) for development of stability indicating HPLC method for determining clonazepam and its related substances in pharmaceutical formulations and calculating uncertainty
In this study, green analytical chemistry approach was applied in attempts for the development of validated stability indicating RP-HPLC method for determining clonazepam and its related substances in pharmaceutical formulation. Validation has been performed according to ICH guidelines. Assay was capable of simultaneous monitoring of the intact drug in the presence of its related substances within the same run. HPLC assay involved an ODS column and a mobile phase composed of 2% sodium dodecyl sulfate, 0.05 M sodium acetate buffer pH 3.5 and isopropanol in ratio (25:55:20) at a flow rate of 1.5 mL/min and detectio...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

A review to recent developments in modification of carbon fiber electrodes
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Roya Mohammadzadeh KakhkiAbstractThe unique properties of carbon fiber electrodes (CFEs) offer a number of particular advantages for their use in analytical applications. However, some pretreatment is usually necessary for the modification of the carbon surface. One of these methods is enzyme modification, that enzyme reactions in the surface of the electrode can be useful for the certain determinations. Also application of nanoparticles is very useful for modification and gives very interesting responses for the electrode in ...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Mini-review: Ferrite nanoparticles in the catalysis
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Boris I. Kharisov, H.V. Rasika Dias, Oxana V. KharissovaAbstractRecent applications of ferrite nanoparticles as catalysts in organic processes are reviewed. Catalytic applications include the use of mainly cobalt, nickel, copper, and zinc ferrites, as well as their mixed-metal combinations with Cr, Cd, Mn and sometimes some lanthanides. Core–shell nanostructures with silica and titania are also used without loss of magnetic properties. The ferrite nanomaterials are obtained mainly by wet-chemical sol-gel or co-precipitat...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Amino acids as catalysts for the enolisation study of m-Methylacetophenone
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Swati Malhotra, Dipika Jaspal, Arti MalviyaAbstractAmino acids have been used as catalysts for the study of kinetic of enolisation of m-Methylacetophenone, in which iodination has been the chosen method. Several parameters like effect of ketone concentration, effect of dielectric constant, effect of catalysts etc. have been investigated for their effect on enolisation kinetics. The study is focused on β-alanine, dl-alanine, l-alanine and Glycine for their effects on the rate. The order of the rate constants obtained has b...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Studies on kinetics and thermodynamics of oxidation of 3,4,5-trimethoxy benzaldehyde, benzaldehyde and N,N-dimethylamino benzaldehyde by tetraethylammonium bromochromate in dimethyl formamide and acetic acid mixture
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Basim H. Asghar, V. Saleem Malik, S. Sheik MansoorAbstractThe oxidation of 3,4,5-trimethoxy benzaldehyde (TMBA), benzaldehyde (BA) and dimethylamino benzaldehyde (DMABA) in N,N-dimethyl formamide (DMF) by tetraethylammonium bromochromate (TEABC) resulted in the formation of the corresponding acids. The reaction is first order with respect to both TEABC and the aldehydes. The reaction is catalyzed by toluene-p-sulfonic acid (p-TsOH). The hydrogen ion dependence has the form: kobs = a + b [H+]. The reaction h...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

New flavone and phenolic esters from Callistemon lanceolatus DC: Their molecular docking and antidiabetic activities
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Syed Nazreen, Mohammad Sarwar Alam, Hinna Hamid, Abhijeet Dhulap, Mohammad Mahboob Alam, Sameena Bano, Saqlain Haider, Mohammad Ali, K.K. PillaiAbstractPhytochemical investigation of the antidiabetic chloroform fraction of the ethanolic extract obtained from the aerial parts of Callistemon lanceolatus DC led to the isolation of three new phytoconstituents, one flavone, 8-(1″-hydroxyisopranyl)-5,6-dihydroxy-7,4′-dimethoxy flavone (1) and two phenolic esters, 2,3,4-trihydroxyphenethyl tetracontanoate (2) and 2,3,4-tr...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Substituent, structural and positional isomerisation alter anti-oxidant activity of organochalcogen compounds in rats’ brain preparations
The objective of the present study was to elucidate the biochemical potencies of eighteen structurally related organoselenium and organosulfur compounds against Fe(II) induced thiobarbituric acid reactive species (TBARS) formation in rat’s brain homogenate. The efficacies of these compounds (only organosulfur) were further confirmed by radical scavenging and thiol peroxidase-like (TPx) activities. Our data revealed that electron-donating groups significantly improve, while an electron-withdrawing group decreases antioxidant activities. The effect of structural isomerisation proved that electron-donating groups attach...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Stearate as a green corrosion inhibitor of magnesium alloy ZE41 in sulfate medium
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Nandini Dindodi, A. Nityananda ShettyAbstractThe efficiency of stearate as a corrosion inhibitor for magnesium alloy ZE41 has been studied in sodium sulfate medium, employing electrochemical techniques like potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). The results of polarization study imply that stearate functions as a mixed-type corrosion inhibitor with a predominant anodic control. The adsorption of stearate on alloy surface is found to obey the Langmuir adsorption isotherm. The proposed inh...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Photocatalysis of β-blockers – An overview
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Vamsi Krishna Marothu, Madhavi Gorrepati, Nagi F. Idris, Salah Ali M. Idris, Ravi Kiran Chowdary LellaAbstractPhotocatalysis is one of the most effective advanced oxidation processes to remove residual pharmaceuticals from the aquatic environment. β-Blockers are the group of pharmaceuticals commonly found in the environment and are showing potential risk to the aquatic and terrestrial organisms. This paper provides an overview of different photocatalytic procedures found in the literature for the abatement of β-block...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Catalytic wet air oxidation of phenol over ultrasound-assisted synthesized Ni/CeO2–ZrO2 nanocatalyst used in wastewater treatment
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Mohsen Parvas, Mohammad Haghighi, Somaiyeh AllahyariAbstractNon-noble metal Ni with different loadings was coated on precipitated CeO2–ZrO2 support by the sonochemistry method and examined for catalytic wet air oxidation of phenol. The structure of the nanocatalysts was determined by BET, FESEM, XRD, and FTIR analyses. The results showed non-uniform morphology of the nanocatalyst at lower Ni contents changed to homogenous morphology with spherical nano particles at higher Ni contents. While the size of NiO crystals remai...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Biochemical response of Cupressus sempervirens to cement dust: Yields and chemical composition of its essential oil
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Karim Hosni, Imed Hassen, Yacine M’Rabet, Hervé CasabiancaAbstractThe effects of cement dust on the yield and chemical composition of the essential oil were investigated in Cupressus sempervirens. Exposure to cement dust resulted in a significant increase in the essential oil yields. Significant factory distance-related changes in qualitative and quantitative composition of the essential oil were observed. Increasing pollution with dust increased the content of monoterpene hydrocarbons concomitant to increase of &...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

A simple, rapid and sensitive method based on modified multiwalled carbon nanotube for preconcentration and determination of lead ions in aqueous media in natural pHs
In this study, multiwalled carbon nanotube (MWCNT) was modified by the pyridine group using a silane agent and characterized by infrared spectroscopy (IR), thermal analysis (TG/DTA), and elemental analysis (CHN) and scanning electron microscopy (SEM). The application of this sorbent was investigated in determination of lead ions in aqueous samples, using flame atomic absorption spectrometry (FAAS). Through this study, different parameters such as pH and sample flow rate on adsorption process and eluent concentration, volume and flow rate were optimized. The limit of detection (LOD), the relative standard deviation and the ...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Adsorption of Basic Magenta II onto H2SO4 activated immature Gossypium hirsutum seeds: Kinetics, isotherms, mass transfer, thermodynamics and process design
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): N. Sivarajasekar, R. BaskarAbstractThe adsorption of Basic Magenta II onto H2SO4 activated immature Gossypium hirsutum seeds was analysed using Ho, modified Freundlich, Sobkowsk–Czerwi, Blanchard, Elovich, Avrami, and modified Ritchie kinetic models by nonlinear regression-sum of normalized errors analysis. The goodness of fit was evaluated with coefficient of determination and root mean square error. The good agreement of experimental data to Avrami second-order model indicated that the mechanism of adsorption followed ...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Fluorescence detection and identification of eight sulphonamides using capillary electrophoresis on released excipients in lake water
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Shubi Jamal, Vishal K. Baderia, Y.K. Agrawal, S.K. SanghiAbstractA simple and sensitive capillary electrophoresis method with fluorescence detection was developed for the determination of sulphanilamide, sulphamerazine, sulphacetamide and sulphanilic acid, sulphathiazole, Sulphisomidine, sulphadoxine and sulphadiazine in lake water. The sulphonamides were extracted from lake water, derivatized with fluorescamine and determination of sulphonamide was achieved using 20 mM borate buffer of pH 9.5 at an applied voltage of 25&...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Simultaneous identification and quantification of five flavonoids in the seeds of Rheum palmatum L. by using accelerated solvent extraction and HPLC–PDA–ESI/MSn
In this study, flavonoids were extracted using accelerated solvent extraction (ASE) with 80% aqueous methanol. A high-performance liquid chromatography equipped with photodiode array detection and coupled with an electrospray ionization tandem mass spectrometry (HPLC–PDA–ESI/MSn) method has been developed for rapid identification and quantification of flavonoids in the plant extract of Rheum palmatum L. (RPL) seeds from Qinghai. Ten flavonoids from methanolic extract of RPL seeds were screened, of which epicatechin, myricetin, hyperoside, quercitrin and quercetin were identified and quantitatively analyzed for ...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Iron(III) phosphate catalyzed synthesis of 1,4-dihydropyridines
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Farahnaz K. Behbahani, Banafsheh YazdanparastAbstractNovel 1,4-dihydropyridines (1,4-DHPs) are prepared efficiently via Hantzsch reaction using aldehydes, benzylacetoacetate and catalytic amount of iron(III) phosphate under solvent-free conditions in good yields. (Source: Arabian Journal of Chemistry)
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Solvent free oxidation of ethylbenzene over Ce-BTC MOF
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Mei Mei Peng, Mani Ganesh, Rajangam Vinodh, Muthiahpillai Palanichamy, Hyun Tae JangAbstractA cerium based metal–organic framework (MOF) Ce-BTC (BTC = 1,3,5-benzenetricarboxylic acid) was synthesized using a solvothermal route and was characterized via powder XRD, BET, SEM, TGA, DRS-UV–vis, FT-IR, and ESR analyses. Oxidative catalytic performance of the synthesized catalyst was evaluated using ethylbenzene oxidation under optimum conditions. The results obtained suggest that the catalyst was efficient in ...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research

Remediation of metalliferous soils through the heavy metal resistant plant growth promoting bacteria: Paradigms and prospects
Publication date: November 2019Source: Arabian Journal of Chemistry, Volume 12, Issue 7Author(s): Munees AhemadAbstractVarious industrial, agricultural and military operations have released huge amounts of toxic heavy metals into the environment with deleterious effects on soils, water and air. Under metal stress, soil microorganisms including plant growth promoting bacteria (PGPB) have developed many strategies to evade the toxicity generated by the various heavy metals. Such metal resistant PGPB, when used as bioinoculant or biofertilizers, significantly improved the growth of plants in heavy metal contaminated/stressed ...
Source: Arabian Journal of Chemistry - November 4, 2019 Category: Chemistry Source Type: research