Journal of Taibah University for Science 
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This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.North-South asymmetry of the solar parameters during the different solar cycles
Publication date: Available online 15 February 2016 Source:Journal of Taibah University for Science Author(s): M.A. El-Borie, A.A. Abdel-halim, S.Y. El-Monier Data of the solar and interplanetary parameters (IMF magnitude B, Solar wind speed V, Proton density n, and the Proton temperature T) during the period from 1975 to 2013, have been used to examine the asymmetry between the solar field north and south of the eliospheric current sheet (HCS). In This work, the asymmetry of the IMF magnitude is obvious, and has no magnetic solar cycle dependence over the considered epochs. The solar wind speed V is faster by ab...
Source: Journal of Taibah University for Science - February 16, 2016 Category: Science Source Type: research
2D QSAR studies of the inhibitory activity of a series of substituted purine derivatives against c-Src tyrosine kinase
Publication date: Available online 21 December 2015 Source:Journal of Taibah University for Science Author(s): Mukesh C. Sharma A series of 34 substituted purine analogues derivatives were subjected to quantitative structure-activity relationship analyses as inhibitors of c-Src tyrosine kinase. Partial least squares regression was applied to derive QSAR models, which were further validated for statistical significance by internal and external validation. The best QSAR model developed had a good predictive correlation coefficient (r 2) of 0.8319, a significant cross-validated correlation coefficient (q 2) of 0.7550, a...
Source: Journal of Taibah University for Science - February 7, 2016 Category: Science Source Type: research
Recovery and subsequent characterization of polyhydroxybutyrate from Rhodococcus equi cells grown on crude palm kernel oil
Publication date: Available online 25 December 2015 Source:Journal of Taibah University for Science Author(s): Nadia Altaee, Ayad Fahdil, Emad Yousif, Kumar Sudesh The gram-positive bacterium Rhodococcus equi was isolated from fertile soil, and mineral salt media (MM) and trace elements were used to provide the necessary elements for its growth and PHB production in addition to using crude palm kernel oil (CPKO) 1% as the carbon source. Gas chromatography (GC) demonstrated that the composition of the recovered biopolymer was homopolymer polyhydroxybutyrate (PHB). The strain of the present study has a dry biomas...
Source: Journal of Taibah University for Science - January 30, 2016 Category: Science Source Type: research
Geoelectrical parameter-based multivariate regression borehole yield model for predicting aquifer yield in managing groundwater resource sustainability
This study developed a GIS-based multivariate regression (MVR) yield rate prediction model of groundwater resource sustainability in the hard-rock geology terrain of southwestern Nigeria. This model can economically manage the aquifer yield rate potential predictions that are often overlooked in groundwater resources development. The proposed model relates the borehole yield rate inventory of the area to geoelectrically derived parameters. Three sets of borehole yield rate conditioning geoelectrically derived parameters—aquifer unit resistivity (ρ), aquifer unit thickness (D) and coefficient of anisotropy (λ)—were de...
Source: Journal of Taibah University for Science - January 29, 2016 Category: Science Source Type: research
Support vector machines for modelling phosphocalcic hydroxyapatite by precipitation from a calcium carbonate solution and phosphoric acid solution
Publication date: Available online 12 November 2015 Source:Journal of Taibah University for Science Author(s): Houda Labjar, Walid Cherif, Salah Nadir, Khalid Digua, Brahim Sallek, Hassan Chaair The aim of this work was to develop an effective quantitative relationship model using support vector machines for the synthesis of phosphocalcic hydroxyapatite by precipitation from a calcium carbonate solution and a phosphoric acid solution. The model was created using a set of factors consisting of the pH of the reaction solution, the Ca/P molar ratio of the reagents, the reaction time and the initial concentrati...
Source: Journal of Taibah University for Science - January 24, 2016 Category: Science Source Type: research
Thermostable acidic protease production in Aspergillus terreus NCFT 4269.10 using chickling vetch peels
Publication date: Available online 21 December 2015 Source:Journal of Taibah University for Science Author(s): Bijay K. Sethi, Arijit Jana, Prativa K. Nanda, Pradeep K. Das Mohapatra, Santi L. Sahoo A newly isolated fungus, Aspergillus terreus NCFT4269.10, was employed in both solid state (SSF) and liquid static surface culture (LSSC) for the production of protease using different agro-residues. Among different substrates appraised, chickling vetch peels (CVP) supported the enhanced production of protease both at LSSC and SSF (499.99±11U/ml; 5266.8±202.5U/gds, respectively). In the presence of peptone (1%, ...
Source: Journal of Taibah University for Science - January 24, 2016 Category: Science Source Type: research
Synthesis, characterization and anti-fungal evaluation of Ni(II) and Cu(II) complexes with a derivative of 4-aminoantipyrine
Publication date: Available online 21 December 2015 Source:Journal of Taibah University for Science Author(s): Monika Tyagi, Sulekh Chandra, Prateek Tyagi, Jameel Akhtar, Arvind Kandan, Baleswar Singh Transition metal complexes of Ni(II) and Cu(II) metal ions with the general stoichiometry [M(L)X]X and [M(L)SO4], where M=Ni(II) and Cu(II), L=(1E)-N-((5-((E)-(2,3-dimethyl-1-phenyl-4-pyrazolineimino)methyl)thiophen-2-yl)methylene)-2,3-dimethyl-1-phenyl-4-pyrazolineamine and X=Cl−, NO3 − and SO4 2−, have been synthesized and characterized. The synthesized ligand and metal complexes were characterized by ...
Source: Journal of Taibah University for Science - January 23, 2016 Category: Science Source Type: research
Acoustical and viscometric studies of buspirone hydrochloride with cobalt(II) and copper(II) ions in aqueous medium
Publication date: Available online 21 December 2015 Source:Journal of Taibah University for Science Author(s): Sandeep Tiwari, Brajendra S. Kusmariya, Anjali Tiwari, V. Pathak, A.P. Mishra Ultrasonic velocity measurements, density measurements and viscometric studies were conducted for the drug buspirone hydrochloride (0.01–0.1M) at three different concentrations (0.1, 0.05 and 0.025M) at 298.15K/1atm. The buspirone hydrochloride was prepared in aqueous solutions of Cu(II) and Co(II) metal ion. The experimental data were used to determine acoustical parameters, such as isentropic compressibility, intermolec...
Source: Journal of Taibah University for Science - January 23, 2016 Category: Science Source Type: research
Synthesis and mesomorphic properties of new heterocyclic liquid crystals with Central Ester–Chalcone linkages
Publication date: Available online 29 December 2015 Source:Journal of Taibah University for Science 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 spectrom...
Source: Journal of Taibah University for Science - January 23, 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: Available online 11 November 2015 Source:Journal of Taibah University for Science 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...
Source: Journal of Taibah University for Science - January 19, 2016 Category: Science Source Type: research
Kinetics and deactivation of a dual-site heterogeneous oxide catalyst during the transesterification of crude jatropha oil with methanol
Publication date: Available online 27 November 2015 Source:Journal of Taibah University for Science Author(s): M.A. Olutoye, B.H. Hameed In this work, a dual-site heterogeneous catalyst was used to study the kinetics of the transesterification of crude jatropha oil with methanol in batch experiments. Experimental data were obtained between 150 and 182°C at a constant molar ratio of alcohol to oil (11:1) and at a set catalyst concentration (3.32wt% based on weight of oil). Kinetic modelling was performed with an assumed pseudo-first order to describe the rate and catalyst deactivation, which suitably fit the experi...
Source: Journal of Taibah University for Science - January 15, 2016 Category: Science Source Type: research
Validation of new mathematical formulae for calculating well-type gamma-ray detector efficiencies
In this study, direct mathematical formulae are found for measuring the full-energy peak efficiency of an HPGe well-type detector, and the values of the measured efficiencies are compared with published studies on the old experimental and theoretical methods with good agreement. In this new approach, the path length d(θ, φ) is derived as a function of the polar angle θ and the azimuthal angle φ, which will reduce the mathematical formulae to a simple and compact shape. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - January 15, 2016 Category: Science Source Type: research
Development and validation of an HPTLC method for the simultaneous estimation of Clonazepam and Paroxetine hydrochloride using a DOE approach
Publication date: Available online 23 December 2015 Source:Journal of Taibah University for Science Author(s): Purvi Shah, Jalpa Patel, Kalpana Patel, Tejal Gandhi The present study examines simultaneous multiple response optimization using Derringer's desirability function for the development of an HPTLC method to detect Clonazepam and Paroxetine hydrochloride in pharmaceutical dosage form. Central composite design (CCD) was used to optimize the chromatographic conditions for HPTLC. The independent variables used for the optimization were the n-butanol content in the mobile phase, the chamber saturation time a...
Source: Journal of Taibah University for Science - January 15, 2016 Category: Science Source Type: research
Colorimetric determination of olanzapine via charge-transfer complexation with chloranilic acid
Publication date: Available online 19 December 2015 Source:Journal of Taibah University for Science Author(s): Olajire A. Adegoke, Olusegun E. Thomas, Stephen N. Emmanuel The charge-transfer complexation (CTC) formed between olanzapine and chloranilic acid have been studied and used as a sensitive colorimetric method for the determination of olanzapine. Evidence for the formation of the CTC between chloranilic acid (CAA) and olanzapine (OLP) was established by spot tests and TLC. Method development was carried out through selection of analytical wavelength, optimization and validation studies. Physicochemical par...
Source: Journal of Taibah University for Science - January 11, 2016 Category: Science Source Type: research
Synthesis and Mesomorphic Properties of New Heterocyclic Liquid Crystals with Ester-Chalcone Central Linkages
Publication date: Available online 29 December 2015 Source:Journal of Taibah University for Science 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 wherein the members differ by the length of alkyloxy chain (CnH2n+1O-, where n=10, 12, 14, 16). The structures of the title compounds were elucidated using spectroscopic techni...
Source: Journal of Taibah University for Science - January 11, 2016 Category: Science Source Type: research
