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Determination of trace amounts of palladium by solution scanometric method
Publication date: Available online 16 January 2017 Source:Journal of Taibah University for Science Author(s): Ardeshir Shokrollahi, Kowsar Ramdar In this research solution scanometry is presented as a highly sensitive, simple and rapid method for colorimetric determination of palladium ion in water samples and walnut leaf. The method is based on the formation of rose-brown complex between Pd2+ ion and excess of iodide in acidic medium, in the Plexiglas cells, scanning of it by conventional flatbed-scanner and analyzing the color of each cell by software written in visual basic (VB 6) media to red, green and blue values...
Source: Journal of Taibah University for Science - January 16, 2017 Category: Science Source Type: research

Electrochemical and anticorrosion properties of 5-hydroxytryptophan on mild steel in simulated well acidizing fluid
Publication date: Available online 16 January 2017 Source:Journal of Taibah University for Science Author(s): Ekemini Ituen, Onyewuchi Akaranta, Abosede James Anticorrosion effect of 5-hydroxytryptophan (5-HTP) on mild steel (MS) was investigated by gravimetric and electrochemical techniques. Two different concentrations (1M and 15%) of hydrochloric acid were used to simulate well acidizing fluid. Results show that in 10×10−5 M 5-HTP is 96.1% efficient in 1M HCl and 78.1% efficient in 15% HCl at 30°C. The efficiency decreases as temperature increases, reaching 66.9% and 39.8% in 1M and 15% HCl respectively at 90°...
Source: Journal of Taibah University for Science - January 16, 2017 Category: Science Source Type: research

Synthesis and Investigation on growth and physiochemical properties of semi-organic nonlinear optical crystal: L-Glutamic Acid Zinc Chloride
Publication date: Available online 16 January 2017 Source:Journal of Taibah University for Science Author(s): S. Chennakrishnan, S.M. Ravikumar, C. Shanthi, R. Srineevasan, T. Kubendiran, D. Sivavishnu, M. Packiyaraj The aim of this work is to synthesis, investigate the growth and physiochemical properties of nonlinear optical semi-organic crystal L-glutamic acid zinc chloride (LGAZC). Optically transparent and defect less crystal was grown by slow evaporation solution growth technique under optimized conditions. The induction periods were measured at various supersaturations and hence the interfacial energies wer...
Source: Journal of Taibah University for Science - January 15, 2017 Category: Science Source Type: research

Synthesis and mesomorphic properties of new heterocyclic liquid crystals with Central Ester –Chalcone linkages
Publication date: January 2017 Source:Journal of Taibah University for Science, Volume 11, Issue 1 Author(s): Yong-Wei Cheryl Lim, Sie-Tiong Ha, Guan-Yeow Yeap, S. Sreehari Sastry A series of new calamitic liquid crystals, 4-[3-(pyridin-4-yl)prop-2-enoyl]phenyl 4-alkyloxybenzoates, comprising a pyridyl core, ester–chalcone central linkage and terminal alkyloxy chain were synthesized and characterized. This series consists of four members that differ by the length of the alkyloxy chain (C n H2n+1O, where n =10, 12, 14, 16). The structures of the title compounds were elucidated using spectroscopic and spectrometric t...
Source: Journal of Taibah University for Science - December 27, 2016 Category: Science Source Type: research

Zn –Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions: Synthesis, characterisation and dye removal properties
Publication date: January 2017 Source:Journal of Taibah University for Science, Volume 11, Issue 1 Author(s): Fatima Zahra Mahjoubi, Abderrahim Khalidi, Mohamed Abdennouri, Noureddine Barka In this work, Zn–Al layered double hydroxides intercalated with carbonate, nitrate, chloride and sulphate ions were synthesised via a co-precipitation method at a constant solution pH. The as-synthesised samples were characterised by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM) and simultaneous thermogravimetric/differential thermal analysis (TGA-DTA). The XRD pa...
Source: Journal of Taibah University for Science - December 27, 2016 Category: Science Source Type: research

A new catalyst for the synthesis of 2-substituted perimidines catalysed by FePO4
Publication date: January 2017 Source:Journal of Taibah University for Science, Volume 11, Issue 1 Author(s): F.K. Behbahani, Fatemeh M. Golchin The reaction of 1,8-diaminonaphthalene with aromatic aldehydes gave 2-substituted perimidines in the presence of FePO4 as a versatile, green and reusable catalyst at room temperature. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - December 27, 2016 Category: Science Source Type: research

Antimicrobial and in vitro cytotoxicity of novel sulphanilamide condensed 1,2,3,4-tetrahydropyrimidines
Publication date: January 2017 Source:Journal of Taibah University for Science, Volume 11, Issue 1 Author(s): Karthikeyan Elumalai, Mohammed Ashraf Ali, Sivaneswari Srinivasan, Manogaran Elumalai, Kalpana Eluri The purpose of the study was to synthesize potent antimicrobial and cytotoxic agents by condensing sulphanilamide with 1,2,3,4-tetrahydropyrimidines. A new series of novel sulphanilamide condensed 1,2,3,4-tetrahydropyrimidines was prepared by reacting N-[(4-aminophenyl) sulphonyl]-3-oxobutanamide with urea/thiourea and aryl aldehyde in the presence of a catalytic amount of laboratory prepared chlorosulphonic ...
Source: Journal of Taibah University for Science - December 27, 2016 Category: Science Source Type: research

Antioxidant activity of 3-arylidene-4-piperidones in the 1,1-diphenyl-2-picrylhydrazyl scavenging assay
Publication date: January 2017 Source:Journal of Taibah University for Science, Volume 11, Issue 1 Author(s): Pattusamy Nithya, Changa Madhavi The 1,1-diphenyl-2-picrylhydrazyl (DPPH) scavenging assay was used to determine the antioxidant activity of novel 3-benzylidene-3-methyl-2,6-diarylpiperidin-4-ones, which were efficiently synthesized in the presence of an eco-friendly montmorillonite-KSF clay catalyst. The synthesized compounds had significantly higher inhibitory concentration values than the reference antioxidant ascorbic acid in a dose-dependent manner. (Z)-3-(4-chlorobenzylidene)-2,6-bis(4-chlorophenyl)-5-met...
Source: Journal of Taibah University for Science - December 27, 2016 Category: Science Source Type: research

Anti-inflammatory, antibacterial and molecular docking studies of novel spiro-piperidine quinazolinone derivatives
This study indicated that compounds 6a and 6f have significant binding activities of 58.36 and 57.67 kjmol−1, respectively. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - December 5, 2016 Category: Science Source Type: research

Xanthohumol protects against renal ischaemia reperfusion (I/R) injury by scavenging ROS and inhibition of JAK-2/STAT-3 inflammatory pathway
In conclusion, these findings show, for the first time, a protective effect of XN against renal I/R injury, and the mechanisms of protection involve ROS scavenging and an anti-inflammatory effect mediated by the inhibition of the JAK-2/STAT-3 pathway. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - November 26, 2016 Category: Science Source Type: research

Drinking water sludge of the Moroccan capital: Statistical analysis of its environmental aspects
Publication date: Available online 26 September 2016 Source:Journal of Taibah University for Science Author(s): Mohammed Dahhou, Mohammed El Moussaouiti, Mohammed El Morhit, Said Gamouh, Souad Moustahsine This paper uses a statistical approach to evaluate the degree of metal pollution, trace element concentrations, and seasonal evolutions of various physicochemical parameters of Moroccan drinking water sludge. Principal component analysis (PCA) was used to analyze these physicochemical parameters (including water temperature (Tw), volatile suspended solids (VSS), and suspended matter (SM)) in liquid raw sludge, the ...
Source: Journal of Taibah University for Science - November 25, 2016 Category: Science Source Type: research

Optimizing derivatization conditions using an experimental design and simultaneous estimation of artemether and lumefantrine by ratio first order derivative spectrophotometric method
Publication date: Available online 19 September 2016 Source:Journal of Taibah University for Science Author(s): Jenee Christian, Purvi Shah, Margi Patel, Kalpana Patel, Tejal Gandhi Artemether–lumefantrine is the most widely used artemisinin-based combination therapy for malaria. The present work aims to develop and validate a simple, accurate, precise and rapid ratio first order derivative spectrophotometric method for the simultaneous estimation of artemether and lumefantrine in a fixed dose combination tablet. The first step in development of the method was to derivatize artemether. As artemether does not show ...
Source: Journal of Taibah University for Science - November 24, 2016 Category: Science Source Type: research

Design, synthesis, and validation of an in vitro platform peptide-whole cell screening assay using MTT reagent
Publication date: Available online 20 October 2016 Source:Journal of Taibah University for Science Author(s): Sahar Ahmed, Kamaljit Kaur An in vitro platform to perform peptide screening against different cancer cell lines was designed. The strategy for this screening relied on the design and detection of high-affinity cancer-targeting peptides based on the sequences of NGR and P160. Evaluation of the best binding peptides was performed via incubation of the peptide array-bounded cells with MTT reagent, which is reduced to purple formazan in living cells and further quantified using an Elispot and Kodak imager. For pro...
Source: Journal of Taibah University for Science - November 23, 2016 Category: Science Source Type: research

Resistivity –thermopower correlation derived temperature-dependent transport behaviour of MnxZn1−xFe2O4 nanoparticles
Publication date: Available online 26 September 2016 Source:Journal of Taibah University for Science Author(s): Jaison Joseph, R.B. Tangsali, S.M. Gurav Ferrite material nanoparticles comprised of manganese and zinc were chemically synthesized by the co-precipitation method. The designated ferrite X-ray diffraction peaks and characteristic ferrite absorption bands in Fourier transform infrared absorption spectra confirmed the formation of a spinel structure. Determination of the full width at half maximum values of the X-ray diffraction peaks and the corresponding calculations using the Scherrer formula suggested the ...
Source: Journal of Taibah University for Science - November 21, 2016 Category: Science Source Type: research

Effects of size and shape on the specific heat, melting entropy and enthalpy of nanomaterials
Publication date: Available online 11 October 2016 Source:Journal of Taibah University for Science Author(s): Madan Singh, Sekhants’o Lara, Spirit Tlali A simple theory is proposed to study the size- and shape-dependent specific heat, melting entropy and enthalpy of nanomaterials. The particle size and shape are demonstrated to affect the specific heat, melting entropy and enthalpy of nanomaterials. The model is applied to Ag, Cu, In, Se, Au and Al nanomaterials in spherical, nanowire and nanofilms shapes. The specific heat is observed to increase with the decrease in particle size, whereas the melting entropy and e...
Source: Journal of Taibah University for Science - November 18, 2016 Category: Science Source Type: research