Journal of Taibah University for Science Journal of Taibah University for Science RSS feedThis 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.

Tribromo melamine catalysed one-pot synthesis of a series of 4-aryl-4,5-dihydro-1H-indeno[1,2-b]pyridine derivatives
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): Prasanna Nithiya Sudhan, Majid Ghashang, Syed Sheik Mansoor A simple and efficient synthesis of 4-aryl-4,5-dihydro-1H-indeno[1,2-b]pyridine derivatives has been achieved via a four-component cyclocondensation of aromatic aldehydes, 1,3-indanedione, β-ketoesters and ammonium acetate in one-pot in the presence of tribromomelamine (TBM) as catalyst under neat conditions. The present approach offers several advantages such as shorter reaction times, higher yields, low cost, simple work-up and easy purificat...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Thermoluminescence dosimetry using natural calcite
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): Yassin A. Abdel-Razek The TL dosimetric characteristics of the natural calcite from El Bakriya, Eastern Desert, Egypt, were studied to investigate their feasibility for use in gamma radiation dosimetry. The peak that appeared at the temperature of 283°C on the TL glow curve was found to have a linear response to the doses over the range of 0.05 to 1000Gy, especially after being annealed at 600°C for 5h before irradiation. Neither annealing nor irradiation changed the activation energy of the traps that pro...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Antioxidant and Inhibitory Properties of Clerodendrum volubile Leaf Extracts on Key Enzymes Relevant to Non-insulin dependent diabetes mellitus and Hypertension
Conclusion The inhibitory properties of phenolic rich extracts on α-amylase, α-glucosidase, ACE, Fe2+- and sodium nitroprusside- induced lipid peroxidation in pancreas could be attributed to the antioxidant properties of the extracts and their phenolic composition. The stronger action of the bound phenolic extract on α-glucosidase may provide the possible bioactivity at the brush border end of the intestinal wall. This study may thus suggest that the leaves may represent a functional food and nutraceutical in the management of Non-insulin dependent diabetes mellitus and Hypertension. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

The AlgebraA(E)
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): Sabra Ramadan Given a locally convex algebra E, we shall construct a vector space A(E) on which multiplication is defined on it. We will show the multiplication so defined on A(E) is associative and that there is a natural embedding of the sets E and its dual space E * in to the vector space A(E). This embedding allows to carryover the operations(linear and bilinear) defined on E and E* to the algebra A(E). Finally we discussed and derive some results about A(E) when E=S(R), the space of functions of rapid d...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Investigation of the corrosion inhibition effect of 3-methyl-6-oxo-4-(thiophen-2-yl)-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridine-5-carbonitrile (TPP) on mild steel in hydrochloric acid
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): Priyanka Singh, M.A. Quraishi, S.L. Gupta, A. Dandia The corrosion inhibition effect of the synthesized compound 3-methyl-6-oxo-4-(thiophen-2-yl)-4,5,6,7-tetrahydro-2H-pyrazolo[3,4-b]pyridine-5-carbonitrile (TPP) on the corrosion of MS in 1M HCl was investigated using weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) methods. The results obtained for TPP showed a good inhibition effect on the MS in the 1M HCl solution. The inhibition efficiency was found to incr...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Removal of Basic Fuchsin dye from water using mussel shell biomass waste as an adsorbent: Equilibrium, Kinetics, and Thermodynamics
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): Mohammadine El Haddad The current study focused on the equilibrium, kinetics, and thermodynamics of Basic Fuchsin dye adsorption from aqueous solution using mussel shells as an adsorbent. Optimum adsorption conditions were identified by varying the solution pH, adsorbent dose, initial dye concentration, and contact time. Equilibrium data were fitted by the Langmuir, Freundlich and Dubinin-Radushkevich isotherm models, and a pseudo-second-order model best described the kinetics. Thermodynamic data showed that...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Biogenic Synthesis Of Silver Nanoparticles Using Pod Extract Of Cola Nitida: Antibacterial, Antioxidant Activities And Application As Additive In Paint
This study has demonstrated the biogenic synthesis of AgNPs with potent antimicrobial and antioxidant activities with potential biomedical and industrial applications. To the best of our knowledge, this work is the first reference to the use of pod extract of C. nitida for the green synthesis of nanoparticles. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Determination of magnesium by the solution scanometric method in a coloured titan yellow magnesium hydroxide complex form
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): A. Shokrollahi, K. Hemmatidoust, F. Zarghampour In this work, the magnesium content was determined by the solution scanometric method using titan yellow (TY) as a complexing agent in alkaline media. This method is based on scanning a solution containing the pink-coloured product of the combination of TY and the magnesium hydroxide complex. Hydroxylamine hydrochloride (HA) and starch were utilized as colour stabilizers and protective colloids, respectively. After the cells containing the sample solution w...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Influence of Operating Variables on the Transesterification of Waste Cooking oil to Biodiesel over Sodium Silicate Catalyst: A statistical approach
This study examined the use of surface response methodology to investigate the influence of operating variables on the transesterification of waste cooking oil (WCO) to biodiesel over sodium silicate catalysts. The individual and interactive effects of three variables namely, reaction time, reaction temperature and amount of catalyst was evaluated using full 23 (+1) factorial design. The conversion of WCO to biodiesel was achieved through the transesterification reaction over the catalyst at a methanol-to-oil molar ratio of 6:1 in a batch reactor. Physicochemical properties of the sodium silicate catalyst were obtained usi...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

On a class of sets between μ-closed sets and μg-closed sets
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): Bishwambhar Roy, Ritu Sen In this paper, a new class of sets called μ * g-closed sets are introduced and investigated with the help of μ-open and μg-open sets. Relationships between this new class and other related classes of sets are established. Some separation axioms has also being studied. Finally, some preservation theorems have been given. (Source: Journal of Taibah University for Science)
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Identity related to additive mappings on standard operator algebras
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): Nadeem ur Rehman, Tarannum Bano Let X be a real or complex Banach space, let L ( X ) be the algebra of all bounded linear operators of X and let A ( X ) ⊆ L ( X ) be a standard operator algebra. Suppose there exists a linear mapping T : A ( X ) → L ( X ) satisfying the relation T(A n )= T(A)A n−1 − AT(A n−2)A − A n−1 T(A) for all A ∈ A ( X ) , where n >2 is some fixed integer. Then T is of the form: (i)T(A)=0 for all A ∈ F ( X ) and (ii) T(A)= BA, for all A ∈ A ( X ...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Behavior of Thermoluminescence Green and Red Emission Bands of Natural Dolomite Irradiated with Gamma Rays
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): C. Soliman, S.M. Metwally, F.F. Alharbi, K.M. Elshokrofy The green and red emission bands of natural dolomite were analyzed by the thermoluminescence (TL) method to test the possibility of their use in different applications belong to radiation measurements in a range of doses between 1Gy and 104Gy. Natural sample revealed 2 peaks at 240°C and 325°C in the green region and 4 peaks at 225°C, 240°C, 270°C and 325°C in the red region. The dose response curves are sublinear for both bands over the ra...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Synthesis, growth, and structural, optical, mechanical, and electrical properties of a new inorganic nonlinear optical crystal: Sodium manganese tetrachloride (SMTC)
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): M. Packiyaraj, S.M. Ravi Kumar, R. Srineevasan, R. Ravisankar A new inorganic nonlinear optical single crystal of sodium manganese tetrachloride (SMTC) has been successfully grown from aqueous solution using the slow evaporation technique at room temperature. The crystals obtained using the aforementioned method were characterized using different techniques. The crystalline nature of the as-grown crystal of SMTC was analysed using powder X-ray diffraction. Single-crystal X-ray diffraction revealed that...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Water Purification using different Waste Fruit Cortex for Heavy Metals Removal
Publication date: Available online 10 November 2015 Source:Journal of Taibah University for Science Author(s): Khairia M. Al-Qahtani The use of different cortex fruit wastes including (banana, kiwi and tangerine) peel for removing toxic and heavy element Cd+2, Cr+3 and Zn+2 ions from aqueous solution has been investigated. The grinded material was powdered in a mortar and passed through a screen in order to get two different particle sizes, 2 and 1mm, for all powders. In preliminary experiments using kiwi cortex, it was found that material with 1mm of particle size showed higher retention capability (up to10-16% of C...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research

Synthesis of Bisimidazolium–Ionic Liquids: Characterization, Thermal Stability and Application to Bentonite Intercalation
In this study, a convenient method was developed for the synthesis of bisimidazolium salts and bisimidazolium–ionic liquids. The products were characterized by nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), mass spectroscopy, elemental analysis and thermogravimetric analyses (TGA). The effect of the counter ion, alkyl chain length and structural isomerism on the thermal stability of the bisimidazolium salts was investigated. Ionic liquid-treated bentonite clays were prepared by ion exchange of the bisimidazolium cations with Na-bentonite. These new organoclays were characterized by X-ra...
Source: Journal of Taibah University for Science - November 11, 2015 Category: Science Source Type: research