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Comparative modelling and molecular docking of nitrate reductase from Bacillus weihenstephanensis (DS45)
This study will be useful in the functional characterization of the nitrate reductase enzyme and its docking with nitrate molecules, as well as for use with autodocking. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - April 30, 2016 Category: Science Source Type: research

Detection of minor and trace elements in powdered milk
Publication date: Available online 16 March 2016 Source:Journal of Taibah University for Science Author(s): Ashraf Hamid, M. Abd El-Samad, N.F. Soliman, H.A. Hanafi Passive gamma ray spectrometry and neutron capture prompt gamma activation analysis (PGAA) were used to investigate powdered cow's milk samples [termed optimal (1), optimal (2) and optimal (3)] collected from local markets in the city of Cairo, Egypt. Standard material with a total average activity of 0.830±0.2μCi and a certified reference material [IAEA (A-14)] were used to study the accuracy of a passive multi-gamma ray measurement method. Three...
Source: Journal of Taibah University for Science - April 30, 2016 Category: Science Source Type: research

QSAR analysis of the toxicity of phenols and thiophenols using MLR and ANN
This study gives a quantitative structure-activity relationship (QSAR) analysis of toxicity of phenols and thiophenols to Photobacterium phosphoreum, which is an important indicator for water quality. The chemical structures of 51 phenols and thiophenols have been characterized by electronic and physic-chemical descriptors. The present study was performed using principal components analysis (PCA), multiple regression analysis (MLR) and artificial neural network (ANN). The quantitative model was accordingly proposed and the toxicity of the compounds was interpreted based on the multivariate statistical analysis. This study ...
Source: Journal of Taibah University for Science - April 30, 2016 Category: Science Source Type: research

Synthesis, growth and characterization of a nonlinear optical crystal: L-Leucinium perchlorate
Publication date: Available online 11 April 2016 Source:Journal of Taibah University for Science Author(s): P. Baskaran, M. Vimalan, P. Anandan, G. Bakiyaraj, K. Kirubavathi, K. Selvaraju The amino acid based semiorganic nonlinear optical family single crystal of L- Leucinium perchlorate (LLPCl) belongs amino acid family was grown by solvent evaporation method at ambient temperature. Good optical quality single crystals up to a size of 6mm x 5mm x 3mm are obtained. The single crystal XRD analysis shows the grown crystals has monoclinic structure. Fourier transforms infrared (FTIR) spectral analysis and UV...
Source: Journal of Taibah University for Science - April 30, 2016 Category: Science Source Type: research

A Shifted Legendre method with residual error estimation for delay linear Fredholm integro-differential equations
Publication date: Available online 11 April 2016 Source:Journal of Taibah University for Science Author(s): Şuayip Yüzbaşi In this paper, we suggest a matrix method for the approximate solutions of the delay linear Fredholm integro-differential equations with constant coefficients by using the shifted Legendre polynomials. The problem is considered with the mixed conditions. By using the required matrix operations, the delay linear Fredholm integro-differential equation is transformed into a matrix equation. Also, error analysis for method is presented by using the residual function. The illustrative examples are ...
Source: Journal of Taibah University for Science - April 30, 2016 Category: Science Source Type: research

Assessment Of Excess Lifetime Cancer Risk From Gamma Radiation Levels In Effurun And Warri City Of Delta State, Nigeria
Publication date: Available online 11 April 2016 Source:Journal of Taibah University for Science Author(s): Agbalagba O. Ezekiel The study of the terrestrial BIR levels to estimate the excess lifetime cancer risk in Warri city have been carried out, using a digilert 100 nuclear radiation monitor and geographical positioning system (GPS) for GIS mapping. The monitoring of the terrestrial BIR levels was carried out between May 2014 and June 2015 by delineated the city into eight zones. Measured average exposure rate ranges from 0.006mRh−1(0.51 mSνy −1 to 0.029mRh−1(2.49 mSνy −1) with overall mean value of 0.0...
Source: Journal of Taibah University for Science - April 30, 2016 Category: Science Source Type: research

Singular values of two-parameter families λ((bz−1)/z)μ and λ(z/(bz−1))η
Publication date: Available online 12 April 2016 Source:Journal of Taibah University for Science Author(s): Mohammad Sajid The singular values of two kinds of two-parameter families of functions (i) f λ , μ ( z ) = λ ( ( b z − 1 ) / z ) μ and f λ,μ (0)= λ(ln b) μ , μ >0, (ii) g λ , η ( z ) = λ ( z / ( b z − 1 ) ) η and g λ,η (0)= λ/(ln b) η , η >0; λ ∈ ℝ ∖ { 0 } , z ∈ ℂ , b >0, b ≠1 are described. It is shown that all the critical values of f λ,μ (z) and g λ,η (z) lie interior and exterior of the disk centered at origin ...
Source: Journal of Taibah University for Science - April 30, 2016 Category: Science Source Type: research

Posner's second theorem with two variable σ-derivations
This study is an attempt to prove the following result: Suppose that R is a 2-torsion free prime ring and Φ : R × R → R is a left two variable σ-derivation such that σ is a monomorphism, Φ ( R × R ) ⊆ σ ( R ) , and [σ(b)− b, x]=0 for all b ∈ I and x ∈ R , where I is an arbitrary fixed non-zero ideal of R . Moreover, assume that I ⊆ σ ( I ) or σ ( I ) is an ideal of R . If [ σ ( a ) , Φ ( a , x ) ] ∈ Z ( R ) for all a ∈ I and x ∈ R , then either R is commutative or Φ is zero. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - April 30, 2016 Category: Science Source Type: research

Antibacterial Activity from Soft Corals of the Red Sea, Saudi Arabia
Publication date: Available online 20 April 2016 Source:Journal of Taibah University for Science Author(s): Rafat M. Afifi Khattab, Ismail M. Abdel-Nabi, Kamal El-Shaikh The present study aimed to screen for antibacterial activities from soft corals of the eastern Red Sea coast. Specimens of different species were surveyed, collected, preserved, extracted and assayed according to the standard protocols. Bioactive materials were extracted using the dichloromethane/methanol mixture and activity was determined using the well diffusion and micro dilution assay methods. All extracts gave a variable activity against th...
Source: Journal of Taibah University for Science - April 30, 2016 Category: Science Source Type: research

Process optimization for the application of carbon from plantain peels in dye abstraction
Publication date: Available online 4 March 2016 Source:Journal of Taibah University for Science Author(s): E. Inam, U.J. Etim, E.G. Akpabio, S.A. Umoren Activated carbon obtained from plantain peels was applied to the optimization of the adsorption process parameters for abstraction of colour from simulated dye effluent. The activated carbon was prepared and characterized using nitrogen adsorption, X-ray diffractometry (XRD) and Fourier transform infrared spectroscopy (FTIR). Equilibrium isotherms were modelled using the Langmuir, Freundlich, Dubinin–Radushkevich and Temkin models; the Temkin and Dubinin–Ra...
Source: Journal of Taibah University for Science - April 8, 2016 Category: Science Source Type: research

Sixth-order compact finite difference method for singularly perturbed 1D reaction diffusion problems
Publication date: Available online 4 March 2016 Source:Journal of Taibah University for Science Author(s): Fasika Wondimu Gelu, Gemechis File Duressa, Tesfaye Aga Bullo In this paper, the sixth-order compact finite difference method is presented for solving singularly perturbed 1D reaction–diffusion problems. The derivative of the given differential equation is replaced by finite difference approximations. Then, the given difference equation is transformed to linear systems of algebraic equations in the form of a three-term recurrence relation, which can easily be solved using a discrete invariant imbedding alg...
Source: Journal of Taibah University for Science - April 7, 2016 Category: Science Source Type: research

Synthesis, crystal structure, Hirshfeld surfaces, and thermal, mechanical and dielectrical properties of cholest-5-ene
Publication date: Available online 8 March 2016 Source:Journal of Taibah University for Science Author(s): Shamsuzzaman, Hena Khanam, Ashraf Mashrai, Mohd Asif, Abad Ali, Assem Barakat, Yahia N. Mabkhot The title compound derived from 3β-chlorocholest-5-ene has been synthesized and characterized successfully. A single crystal X-ray investigation of the compound revealed that the van der Waals interactions play a key role in the formation of the elementary structure. Hirshfeld surface analysis was used to visualize the fidelity of the crystal structure. This method permitted the identification of individ...
Source: Journal of Taibah University for Science - April 7, 2016 Category: Science Source Type: research

Phylogenetic affiliations of Bacillus amyloliquefaciens isolates produced by a bacteriocin-like substance in goat milk
Publication date: Available online 5 March 2016 Source:Journal of Taibah University for Science Author(s): Ahmed M. Hanafy, Adel A. Al-Mutairi, Rasha M. Al-Reedy, Saleh M. Al-Garni Eight isolates identified as belonging to the genus Bacillus were obtained from Aloqt (a crusty dried product made from goat milk). The cell-free culture supernatant (CFCS) from the eight isolates possessed an inhibitory spectrum against Staphylococcus aureus and Escherichia coli. The eight unknown bacterial isolates were identified by PCR amplification of their 16S ribosomal RNA gene and sequencing of the resulting PCR products. All...
Source: Journal of Taibah University for Science - April 6, 2016 Category: Science Source Type: research

Soliton solution in nonlinear lattice with nearest neighbour Born–Mayer interaction
Publication date: Available online 10 March 2016 Source:Journal of Taibah University for Science Author(s): Muzzammil Ahmad Bhat, Gautam Johri, N.K. Pandey We study the dynamics of one-dimensional uniform lattice with the interatomic Born–Mayer potential. The travelling wave solutions such as solitons are analytically described. The wave propagation in the one-dimensional lattice where nearest neighbour atoms interact via the Born–Mayer potential is considered. The Born–Mayer lattice admits travelling wave type solutions represented by Jacobian elliptic functions and limiting form of such a wave solution is...
Source: Journal of Taibah University for Science - April 6, 2016 Category: Science Source Type: research

The First International Conference on Radiation Physics and Its Applications
Publication date: April 2016 Source:Journal of Taibah University for Science, Volume 10, Issue 2 (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - March 24, 2016 Category: Science Source Type: research