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Spectroscopic and computational investigation of the structure and pharmacological activity of 1-benzylimidazole
Publication date: November 2017 Source:Journal of Taibah University for Science, Volume 11, Issue 6 Author(s): A. Madanagopal, S. Periandy, P. Gayathri, S. Ramalingam, S. Xavier, Vladimir K. Ivanov The chemical and pharmacological activity of the compound 1-benzylimidazole was analysed using vibrational, NMR and UV-Visible spectroscopic tools. The necessary data were obtained by recording FT-IR, FT-Raman, NMR and UV-Visible spectra. 1H and 13C NMR spectral chemical shifts were observed and investigated to understand the basis of the antiparasitic, antifungal and antimicrobial activities. The elaborate electronic ex...
Source: Journal of Taibah University for Science - November 3, 2017 Category: Science Source Type: research

Safety evaluation of green synthesized Cola nitida pod, seed and seed shell extract-mediated silver nanoparticles (AgNPs) using an Allium cepa assay
Publication date: Available online 27 June 2017 Source:Journal of Taibah University for Science Author(s): Taofeek A. Yekeen, Musibau A. Azeez, Akeem Akinboro, Agbaje Lateef, Tesleem B. Asafa, Iyabo C. Oladipo, Samuel O. Oladokun, Adewumi A. Ajibola The increase in the use of nanoparticles in various fields of human endeavours calls for the need to understand the toxic potential of green synthesized nanoparticles. Cytogenotoxic potentials of green synthesized Cola pod (Cp-AgNPs), seed (Cs-AgNPs) and seed shell (Css-AgNPs) silver nanoparticles and silver nitrate salts (Ags) were evaluated using an A. cepa assay. T...
Source: Journal of Taibah University for Science - September 1, 2017 Category: Science Source Type: research

In vitro Antimicrobial and in vivo Lead Acetate Poison Abatement Study of Garcinia kola Heckel
Publication date: Available online 28 June 2017 Source:Journal of Taibah University for Science Author(s): Omorefosa Osarenkhoe Osemwegie, Charles Obiora Nwonuma, Abimbola Peter Oluyori, Praise Ocheanya Abraham, Abraham Abayomi Akanbi, Deborah Oluyemisi Opaleke, Omokolade Oluwaseyi Alejolowo The in vitro antimicrobial and in vivo heavy metal abatement properties of aqueous extracts of Garcinia kola Heckel (bitter cola) were investigated using opportunistic pathogens and Wistar rats as experimental models. A marked inhibitory activity against Aspergillus niger, Aspergillus flavus and Candida albicans was recorded a...
Source: Journal of Taibah University for Science - August 18, 2017 Category: Science Source Type: research

Microwave radiation improves biodiesel yields from waste cooking oil in the presence of modified coal fly ash
Publication date: Available online 23 June 2017 Source:Journal of Taibah University for Science Author(s): Yulin Xiang, Yukun Xiang, Lipeng Wang This paper studied the effects of using modified coal fly ash as a catalyst to convert waste cooking oil (WCO) into biodiesel under microwave-strengthened action. Coal fly ash was modified with sodium sulphate and sodium hydroxide, and the obtained catalyst was characterized using FT-IR and X-ray diffraction (XRD). The experimental results showed that the modified coal fly ash catalyst improved biodiesel yields under the microwave-assisted system, and the maximum biodiesel yi...
Source: Journal of Taibah University for Science - August 17, 2017 Category: Science Source Type: research

Role of Ag additives on light-induced metastable defects in a Se –In glassy system
Publication date: Available online 23 June 2017 Source:Journal of Taibah University for Science Author(s): Anjani Kumar, D. Kumar, S.K. Tripathi, R.K. Shukla, A. Kumar The paper reports the role of Ag additives on light induced metastable defects in Se–In glassy alloys using a well-known thermally stimulated current (TSC) technique. Amorphous thin films of Se90In10−xAgx (x=0, 2, 4, 8) were prepared by thermal evaporation. Measurements were made in the given thin films prior to and after exposing amorphous thin films to white light for different exposure times (0–1.5hrs). The density of light induced metastable...
Source: Journal of Taibah University for Science - August 7, 2017 Category: Science Source Type: research

Preparation of nanocrystalline Cd-doped PbS thin films and their structural and optical properties
Publication date: Available online 23 June 2017 Source:Journal of Taibah University for Science Author(s): S. Rajathi, K. Kirubavathi, K. Selvaraju PbS and Cd-doped PbS nanocrystalline thin films prepared by the chemical bath deposition technique was deposited onto glass substrates at 80°C. The aqueous solution containing Cd2+ and Pb2+ precursors was used to obtain good quality film deposits at optimized preparative parameters. The characterization of these films was performed using X-ray diffraction, optical absorption, photoluminescence properties, scanning electron microscopy and energy dispersive X-ray analyses t...
Source: Journal of Taibah University for Science - August 3, 2017 Category: Science Source Type: research

Antimicrobial activities of the Streptomyces ceolicolor strain AOB KF977550 isolated from a tropical estuary
Publication date: Available online 6 July 2017 Source:Journal of Taibah University for Science Author(s): Bamidele T. Odumosu, Olanike M. Buraimoh, Chiamaka J. Okeke, James O. Ogah, Frederick C. Michel The aim of this study was to screen for important antibiotic producing species of the genus Streptomyces from a tropical estuary. Five bacterial strains were isolated from the Lagos lagoon and identified by 16S rDNA gene sequencing as Streptomyces albogriseolus, S. aureus, S. coelicolor, S. albus, and S. pseudogriseolus. Ethyl acetate extracts of Streptomyces spp. fermented broths were evaluated against laboratory str...
Source: Journal of Taibah University for Science - August 3, 2017 Category: Science Source Type: research

Size and shape effects on the band gap of semiconductor compound nanomaterials
Publication date: Available online 24 July 2017 Source:Journal of Taibah University for Science Author(s): Madan Singh, Monika Goyal, Kamal Devlal The size and shape dependent band gap energy of semiconductor compound nanomaterials (SCN) is formulated. The model theory is based on the cohesive energy of the nanocrystals compared to the bulk crystals. We have considered CdSe, CdTe, ZnS, ZnSe and ZnTe semiconductors compounds for the study of size and shape dependent band gap energy. It is found that the band gap energy of SCN depends upon the particle size and shape. The model predicts that the band gap energy increase...
Source: Journal of Taibah University for Science - July 25, 2017 Category: Science Source Type: research

Investigation on electrochemical performance of Hausmannite Mn3O4 nanoparticles by ultrasonic irradiation assisted co-precipitation method for supercapacitor electrodes
Publication date: Available online 24 July 2017 Source:Journal of Taibah University for Science Author(s): R. Tholkappiyan, A.Nirmalesh Naveen, K. Vishista, Fathalla Hamed Spinel type-manganese oxide (Mn3O4) nanoparticles were synthesized by ultrasonic irradiation assisted co-precipitation method using PEG and NaOH. The formation of tetragonal hausmannite phase (Mn3O4) with spinel structure was confirmed from XRD and FTIR studies. The average crystallite size of Mn3O4 nanoparticles was determined from Scherrer formula (39.9nm) and Williamson-Hall relation (36.5nm). The presence of elements, overall oxidation state of...
Source: Journal of Taibah University for Science - July 25, 2017 Category: Science Source Type: research

High performance Pd –Rh/YBaCo4O7/γ-Al2O3 three-way catalysts for gasoil engine
Publication date: Available online 30 June 2017 Source:Journal of Taibah University for Science Author(s): Brou Albert Kouadio, Fuming Mei, Tao Li, Lei Pang The evaluation of catalytic activity for Rh–Pd/YBa(Co1−xMx)4O7/γ-Al2O3 (M=Al, Ce, Zr, and La) showed that the efficiency of NOx reduction depends strongly on the nature of the OSMs. Among a series of oxygen storage materials, YBa(Co1−xMx)4O7 (M=Ce, Zr, La, Ga and In) studied for catalyst enhancement, only the catalyst with YBa(Co0.9Ce0.1)4O7 has better conversion efficiency respectively (85% of NO, 96% of CO and 92% of HC). After treatment at 1000°C for 3...
Source: Journal of Taibah University for Science - July 24, 2017 Category: Science Source Type: research

Boubaker polynomials collocation approach for solving systems of nonlinear Volterra –Fredholm integral equations
Publication date: Available online 23 June 2017 Source:Journal of Taibah University for Science Author(s): Sara Davaeifar, Jalil Rashidinia Numerical schemes have been developed for solutions of systems of nonlinear mixed Volterra–Fredholm integral equations of the second kind based on the First Boubaker polynomials (FBPs). The classical operational matrices are derived. The unknown has been approximated by FBPs and the Newton–Cotes points were applied as the collocations points. Error estimate and convergence analysis of the proposed method have been proved. Some numerical experiments are considered. The results a...
Source: Journal of Taibah University for Science - July 21, 2017 Category: Science Source Type: research

Proficient synthesis of bioactive annulated pyrimidine Derivatives: A review
Publication date: Available online 10 July 2017 Source:Journal of Taibah University for Science Author(s): Ajmal R. Bhat, Rajendra S. Dongre, Gowhar A. Naikoo, Israr U. Hassan, Tabassum Ara Synthesis of bioactive annulated pyrimidine derivativies are the most significant tasks in N-heterocyclic chemistry, as proved to be very attractive and constructive for the design of a new molecular framework of potential drugs with varying pharmacological activities. This review paper summarizes the one-pot multicomponent synthesis of annulated Nitrogen and oxygen-containing heterocycles, such as Pyrano[2,3-d]pyrimidines, Pyrid...
Source: Journal of Taibah University for Science - July 11, 2017 Category: Science Source Type: research

ANN/BIM-Based Model for Predicting the Energy Cost of Residential Buildings in Saudi Arabia
Publication date: Available online 10 July 2017 Source:Journal of Taibah University for Science Author(s): Dr. Adel Alshibani, Othman Subhi Alshamrani This paper introduces a novel conceptual system to predict the energy cost of residential buildings in the Kingdom of Saudi Arabia (KSA). The paper briefly describes the main models of the developed system to maintain continuity and focuses on the energy cost prediction model. The developed system aims to assist architects in designing residential buildings to minimise energy costs under Saudi Arabian environmental conditions. The system was built based on data collected...
Source: Journal of Taibah University for Science - July 11, 2017 Category: Science Source Type: research

A new approach for solving fractional differential-algebraic equations
Publication date: Available online 24 May 2017 Source:Journal of Taibah University for Science Author(s): F. Ghomanjani In this paper, the Bezier curves method is implemented to give approximate solutions for fractional differential-algebraic equations (FDAEs). This methods in applied mathematics can be used as approximated method for obtaining approximate solutions for different types of fractional differential equations. An illustrative example is included to demonstrate the validity and applicability of the suggested approach. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - July 10, 2017 Category: Science Source Type: research

Antimicrobial activities of streptomyces ceolicolor strain aob kf977550 isolated from a tropical estuary
Publication date: Available online 6 July 2017 Source:Journal of Taibah University for Science Author(s): Bamidele T. Odumosu, Olanike M. Buraimoh, Chiamaka J. Okeke, James O. Ogah, Frederick C. Michel The aim of this study is to screen for antibiotically important Streptomyces from a tropical estuary. Five bacterial strains identified by 16S rDNA gene sequencing as Streptomyces albogriseolus, S. aureus, S. coelicolor, S. albus, and S. pseudogriseolus were isolated from the Lagos Lagoon. Ethyl acetate extracts of the test Streptomyces spp fermented broths were evaluated against laboratory strains of MRSA Staphylococ...
Source: Journal of Taibah University for Science - July 7, 2017 Category: Science Source Type: research