International Journal of
Physical Sciences

  • Abbreviation: Int. J. Phys. Sci.
  • Language: English
  • ISSN: 1992-1950
  • DOI: 10.5897/IJPS
  • Start Year: 2006

IJPS Articles in press

Article in Press

The Superiority of Supercritical Fluid Extraction Over Steam Distillation and Solvent Extraction Methods for the Extraction of Aroma from Salacca Zalacca (Gaertn.) Voss.

Salacca zalacca (Gaertn.) Voss (salak fruit or snake fruit) is a species of palm tree native to Southwest Java and North Sumatra in Indonesia. It is known as one of the tropical fruits in Malaysia. It is a reddish-brown scaly skin with pleasant pineapple, pear and banana-like aromas. Its strong pleasant aroma, S. zalacca has high potentiality in the perfumery and pharmaceutical industries. The volatile aromas of plants are...

Author(s):Nur Nadhirah H. M, Siti Zaiton M.S, Tengku M. A, Zaidul I. S. M, Mohammad Jamshed Siddiqui, Anugerah Budipratama Adina, Md. Nurul Islam Siddique, Wan Nik Bin Wan Sani and Mokhlesur M.R.

Article in Press

Mineralogical and Major oxide Characterization of Panyam clays, North – Central Nigeria

Clay minerals are form over long periods of time, through weathering as a result of gradual chemical breakdown of rocks rich in feldspar. The extent of weathering is determined by many factors. Most common constituent mineral of clays is often one of the members of the mica mineral group. They include illite, sericite, muscovite, and biotite. Others are kaolinite, smectite, mixed-layer clays and chlorite. This paper...

Author(s):Umbugadu A.A. and Igwe O.

Article in Press

Analysis of clearness index on a regional scale

Analysis of daily average clearness index and relative possible number of sunshine hours n/N have been made using accumulated meteorological data obtained from Nigeria Meteorological Agency (NIMET) station, Oshodi, Nigeria from 1985 to 2014. The values of regression constants ( and ), sum of the regression constants ( ), Mean-Bias-Error (MBE), root-mean-square-error (RMSE) and correlation-coefficient (RC) are presented...

Author(s):K.O. Rauff, I.A. Abir and Abdul Qadir

Article in Press

Combined heat and mass transfer effects in polymeric liquid between isothermal stretching disks with convective boundary conditions

A theoretical analysis is performed to examine the flow of an incompressible polymeric liquid (Maxwell fluid) between two infinite isothermal stretching disks. The convective heat and mass boundary conditions are taken into account. Further, the effects of viscous dissipation and chemical reaction are also carried out. The governing equations associated with momentum, energy and concentration profiles are reduced into set...

Author(s):M. S. Hashmia, N. Khanb and Sami Ullah Khanc

Article in Press

Application of Density Matrix Renormalization Group to One dimensional Hubbard Model to Study Strongly Correlated Electrons system

: In this work, we applied Density Matrix Renormalization Group to one-Dimensional Hubbard model at five numbers of sweep to solve strongly correlated interacting electrons system, starting from two electrons on two sites up to ten electrons on ten sites at half filling. The results emerging from our present study was in agreement with that of exact diagonalization, variational and Lanczos solution at the varying values of...

Author(s):

Article in Press

Spacelike Surfaces with a Common Asymptotic Curve in Minkowski 3-Space E_1^3

In this paper, we study the problem of finding a family of spacelike surfaces from a given spatial asymptotic curve in Minkowski 3-space. We obtain the parametricrepresentation for a spacelike surface pencil whose members share the same asymptoticspacelike curve as an isoparametric curve. Using the Frenet frame of the given asymptoticcurve, we present the spacelike surface as a linear combination of this frame and...

Author(s):Rashad A. Abdel-Bakya

Article in Press

A Framework of (5G) Networks as the Foundation for IoTs Technology for Improved Future Network

The quest for improved communications among objects interconnected in a network has long been awaited. The current fourth generation network ( 4g) do not enable the range of services the future requires, the fifth generation network (5G) will be faster and more flexible. The 5G networks and Internet of Things Technology seem to be the long awaited reality that best describes the basic principles of the future...

Author(s):MODESTA .E. EZMA

Article in Press

ESTIMATION OF RADIOLOGICAL PARAMETERS ASSOCIATED WITH MINING OF TANTALITE IN OKE-OGUN, OYO STATE, NIGERIA

Mining activities brings the artisan miners to close proximity with naturally occurring radioactive materials (NORM) which exposes the miners to ionizing radiation. In this study, estimation of radiological hazards and risks related to work activities in Tantalite mining sites in Oke-Ogun, Oyo State has been carried out. A total 40 samples comprising of (12) Tantalite ore ({Fe,Mn}Ta206), 17 soil samples and 11 waste rocks...

Author(s):ABAYOMI EKUNDAYO AJETUNMOBI

Article in Press

Dual solutions for the Modified Fourier and Fick,s theories for Carreau nanofluid

In the current framework, an investigation is carried out on the flow of dual solutions of Car- reau nanofluids in the presence of Cattaneo-Christov double diffusion with focus on heat and mass transfer which includes the effects of Brownian motion and thermophoresis parameter. A nonlin- early shrinking sheet has been used to create the flow. The thermal and concentration diffusions are considered by introducing...

Author(s):Humara Sardar

Article in Press

Volumetric and Viscosity Properties for the Binary Mixtures of 1-hexyl-3-methylimidazolium Tetrafluoroborate with butyl acetate.

In this work, densities and viscosities for the binary mixtures of 1-hexyl - 3-methylimidazolium tetrafluoroborate, [C6mim][BF4], with butyl acetate, have been determined at 298.15 K. These data were used to calculate the excess molar volumes VEm for the mixtures. It is shown that values of VEm are negative, in the whole concentration range. The VEm values show their minimum at the composition of χIL≈ 0.3, exhibit a...

Author(s):Ayyasamy A

Article in Press

〖Coexistence of superconductivity and Spindensity wave in ferropnictides Ba〗_(1-x) K_x 〖Fe〗_2 〖As〗_2

The study of spin-density-wave (SDW) and superconducting order parameter is a core topic for research on the FeAs-based high Tc superconductors. By using mathematical model Hamiltonian for the system and Green’s function formalism (creation and annihilation operators), we have obtained expressions for superconducting transition temperature (TC), spin density wave transition temperature (Tsdw), superconductivity order...

Author(s):Sewnet Demelash Yihun

Article in Press

Designing off-grid hybrid energy suply with photovoltaics in Senegal

In Africa electrification rates of the rural areas are low and off-grid power supply is needed. Often diesel generators are used to provide local electricity supply. However, the tremendous decrease of the costs of photovoltaics provides an attractive option to substitute existing diesel generation or to build up a new electricity supply in those locations, lowering power costs and environmental impact. Photovoltaics (PV)...

Author(s):T. Schneiders

Article in Press

A TECHNIQUE FOR DETERMINING EFFICIENCY OF AEROSOL SAMPLER

Viscosity, an important aspect in air flow at the lowest layer of the atmosphere was determined during Harmattan period as 1.88 x 10-5 Nsm-2 ± 0.04%. Kinematic viscosity, another important parameter on atmospheric motion was established as 0.54 x 10-5 m2s-1 ± 0.02%. For contribution to protection of human and ecological systems from dangerous levels of air pollution, a new technique for determining the efficiency of...

Author(s):M. I. MAMUNU

Article in Press

Judd–Ofelt analysis, Structure and Optical spectra of Er3+ in calcium-sulfate phosphate based glasses

Er3+ -doped CaSO4-P2O5 glasses with successive increase in Er2O3 contents (from 0.1 to 0.9 mol %) were prepared using melt-quench method aimed to improve their chemical stability and optical behavior. The structure was investigated using FT-infrared and Raman spectroscopy. Non-crystalline phases were detected by X-ray diffraction (XRD) spectroscopy. From the Raman spectra, Qi were identified (i = 0, 1, 2 and 3) stands for...

Author(s):Aliyu Mohammed Aliyua

Article in Press

Application of integrated geophysical methods in environmental studies: a case study of oil leakage in thange area Makueni County, Kenya

This research was conducted with an aim of mapping the extent of subsoil and ground water contamination within the area. The contamination was as a result of an oil pipeline leakage that had gone undetected for some time and whose effects were evident on human and animal health, and crop yield. The leakage was more pronounced at possible recharge zones i.e. in thick sediments of volcanic origin (olivine basalts) and river...

Author(s):K’orowe Maurice O

Article in Press

Modeling and simulation of a high-pressure polyethylene tubular reactor

The complex world of polymerization has become an important topic for research due mainly to the great investments it demands and the difficulty in operation of the huge plants that exist to produce polymers. Many papers have been written about this, most of them focusing on the reactor performance and its stability. In the present work, a model and simulation for the high- pressure polyethylene tubular reactor has been...

Author(s):Roberto Ferro Escobar

Article in Press

Approximate Solutions of the Relativistic Dirac equation with Coulomb-Hulthén-like Tensor Interaction

The solutions of spin and pseudospin symmetries with Trigonometric scarf potential are obtained in the presence of a new tensor interaction which breaks down the energy degeneracies in both symmetries leading to atomic stability. The nonrelativistic equation is obtained by taking the nonrelativistic limit of the spin symmetry. A simplified condition for energy equation for Formula method for special case is also given....

Author(s):C.A. Onate, O. Adebimpe, A.F. Lukman and I.J. Adama

Article in Press

Feasibility analysis of hybrid electricity generation system by HOMER for Mauritanian northern coast

The reported work was motivated by the energy needs in the Mauritania region and the utility of the search features of a software system, named HOMER (Hybrid Optimization of Multiple Energy Resources), for feasibility analysis of a hybrid power generation system (HS) for the Mauritanian northern coast. This study analyzed a sample of the available wind resources to meet the energy needs of these localities, using the HOMER...

Author(s):M. Soukeyna, I. B. Ramdhane, D. Ndiaye, M. Elmamy, M. M. Menou, A. M. Yahya, A. K. Mahmoud and I. Youm

Article in Press

Laplace decomposition method for Whitham-Broer-Kaup shallow water waves equations

In this paper, the Laplace decomposition method was applied to find travelling wave solutions of the Whitham-Broer-Kaup (WBK) system. To illustrate the capability of the approach, two numerical examples are given where the propagation and the error of the obtained solutions are shown in comparison of its exact solution. The approximate solutions are calculated in form of convergence power series with easily computable...

Author(s):Jamshad Ahmad and Mariyam Mushtaq

Article in Press

Comparative analysis of meteorological data from satellite and ground-based at some selected stations in Nigeria

This work studied the comparative analysis of meteorological parameter (temperature, solar radiation and relative humidity) of satellite and Nigerian Meteorological Agency (NIMET) data at Kano, Kaduna, Owerri and Sokoto for 2006, 2007, 2008, and 2010, respectively. Statistical tools of mean bias error (MBE), root mean square error (RMSE) and correlation coefficient (r) were determined to validate the data. The results...

Author(s):Isikwue B. C., Sombo T. and Ibeh G. F.

Article in Press

Coupling of iteration method and exact Lagrange multipliers for Helmholtz and non-linear parabolic equations

Solutions of partial differential equations are of great importance for mathematicians and scientists. In this paper, the author likewise calculated exact Langrage multiplier and it progressively connects to the definite results of Helmholtz and nonlinear parabolic equations. This study shows the advantages of exact Lagrange multipliers and their coupling with Variational Iteration Method. Computational work shows that the...

Author(s):Muhammad Hamid, Muhammad Usman and Syed Tauseef Mohyud-Din

Article in Press

Analysis of long-term rainfall trends over Nigeria

Monthly mean of rainfall data (mm) between January to December for the period 1901 to 2006 for 23 stations (grid points) over Nigeria were analyzed in this study. The trends of rainfall over the 23 stations were examined statistically based on the time series, mean, standard deviation of the rainfall data. The study period were sub-divided into 30-year Climatic means and compared with World Meteorological Organization...

Author(s):Olakunle Rufus Oladosu

Article in Press

Effect of Eddy diffusion on atmospheric electrical processes in a fair weather environment

Most of the past studies have been concentrated towards the average current that flows from the thunderstorm into the global electric circuit, the role of equalization layer, and the variations of electric field for maintaining the ionosphere’s electric potential difference in the atmosphere, which are directed downward between the equipotential surfaces of the ionosphere and ground. The analytical relation for both the...

Author(s):Falade John A.

Article in Press

Seasonal variability of rainfall and its decadal anomaly over Nigeria: Possible role of solar and geomagnetic activities

This study investigates the seasonal variations of rainfall and its decadal anomaly over Nigeria and the possible role of solar and geomagnetic activities. Sunspot number and geomagnetic aa index were used as solar indices. Monthly mean daily rainfall data from Nigeria Meteorological (NIMET) Agency was used in this study. Descriptive, bivariate, and power spectral density (PSD) analyses, as well as Mann-Kendall trend test...

Author(s):AUDU Moses Owoicho and OKEKE Francisca Nneka

Article in Press

Preparation and characterization of Holmium doped borate glass

Holmium doped borate glasses were prepared by conventional rapid melt-quench method. The X-ray powder diffraction (XRD) pattern indicates the amorphous nature of Holmium doped borate glass. Photoluminescence spectrum gives an idea of the optical properties of Holmium doped borate glass. Determination and differentiation of the various vibrational modes were done using Fourier transform infrared spectroscopy (FTIR)...

Author(s):Deepa A. V., Priya M. and Suresh S.

Article in Press

Design, green synthesis and reactions of 2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6 sulfonohydrazide derivatives

2,3-Dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonohydrazide and its derivatives were synthesized and characterize by IR, 1H-NMR, 13C-NMR and mass spectrometry analytical methods. The 2,3-dioxo-1,2,3,4-tetrahydroquinoxaline-6-sulfonyl hydrazide (compound 1), was synthesized from the reaction of o-phenylenediamine with oxalic acid to obtain quinoxaline-2,3-dione, which was subjected to chlorosulfonation with chlorosulfonic...

Author(s):Festus O. Taiwo and Craig A. Obafemi

Article in Press

Overview of atmospheric physics to study climate variability, greenhouse gas impact and atmospheric temperature profile

Atmospheric Physics is a fascinating scientific discipline, presents a comprehensive coverage of global meteorology and climatology. It has provided essentially a viable means for tackling environmental issues, key to vital and challenging problems facing weather and climate predictions. This Paper discusses a basic understanding of atmospheric physics as an essential field behind issues of current concern on climate...

Author(s):Anoruo C. M., Okoro E. C., Okpala K. C., Orji P. O., Sivla W. T. and Robert J. J.

Article in Press

Improvements of corrosion resistance of Nickel–titanium (NiTi) orthopedic materials by inductively coupled radio frequency plasma

Nickel–titanium shape memory alloys (NiTi) are relatively special group of metallic biomaterials. Extraordinary properties of NiTi shape memory alloys are widely employed in medical applications (orthopedics, orthodontics, urology, etc.) owing to their desirable properties, such as superelasticity, relatively low modulus and good corrosion resistance. Furthermore, toxicity and carcinogenesis of Ni ions released from NiTi...

Author(s):Fayez Mahmoud El-Hossary, Sayed Mohammed Khalil, Magdy Abdel Wahab Kassem, Medhat Abed EL Lateef and Khaled Lotfy

Article in Press

Impedance, AC conductivity and modulus analysis of bis (2-amino-4-methylpyridinium) tetrachloridozincate (II) compound

In this paper, we report the measurement of impedance spectroscopy for the bis(2-amino-4-methylpyridinium) tetrachloridozincate (II) compound in the frequency range 209 Hz to 5 MHz with the temperature ranging from 308 up to 368 K. The impedance plots have shown semicircle arcs at different temperatures and an electrical equivalent circuit has been proposed to explain the impedance results. Detailed analysis of the...

Author(s):M. Hamdi, R. Elwej, M. Benamira, M. Megdiche and F. Hlel

Article in Press

Measurement of electromagnetic fields (EMF) from mobile phone base stations in Abeokuta, Ogun State, South-Western Nigeria

The possible hazardous health effects of exposure of humans to electromagnetic radiations (EMR) emitted from mobile phone base station has caused concern to the general public. The concerns on the perceived negative effects of EMF radiations from mobile phone base transceivers led to agitations against the erection of base transceiver stations (BTS). Therefore, the measurement of levels of electromagnetic field (EMF)...

Author(s):Taiwo T. K., Alausa S. K., Oluwafisoye P. A., Adegbile A. A., Bayode O. P. and Ilori A. O.

Article in Press

Plastics: The good, the bad and the ugly

Plastics’ demand and consumption is on the increase since 1950s due to their unique properties. Their high use coupled with challenges in end-of-use handling and their inherent resistance to degradation has led to their accumulation in the environment, which is a matter of grave concern. This review presents a general overview of the state of knowledge of the diverse faces of plastics with special reference to...

Author(s):Kamweru Paul K.and Tindibale Edward L.

Article in Press

The structural properties of composites ZnS1-xCux thin films prepared by laser ablation

The prepared samples of thin-film composite by laser ablation method were achieved. Powders of zinc slfide with copper of weight ratios x=0, 0.2, 0.4, 0.6, 0.8wt% were mixed and then compressed by approximately 10 t. The samples were ablated by using Neodymium-YAG laser with 1000 mJ and 700 pulses obtained the plasma plume at 10-5 m bar pressure and 250°C. Results were indicated using X-ray diffraction (XRD), atomic force...

Author(s):Ali J. Khalaf and Faisal A. Mustafa

Article in Press

Mathematical models used in the prediction of deaths due to fire accident in Taraba State, Nigeria

This research is concerned with the application and comparison of mathematical models for predicting deaths due to fire accident in Taraba State. This research was carried out because it was observed that whenever fire accident occurs, it claims lives and properties. Data were collected for the period of ten (10) years from 2005 to 2014 from Fire Service Board, Jalingo, Taraba State, Nigeria. Various models, such as...

Author(s):Okorie, C. E., Dauda, A. A, Adubisi, O. D., Ben, O. J. and Mom Titus T.

Article in Press

Characterization prime and weakly prime left ideals in near left almost rings (nLA-rings)

The purpose of this paper was to introduce the notion of weakly prime left ideals in near left almost rings by studying, prime and weakly prime left ideals in near left almost rings (nLA-rings). Those are extended from prime and weakly prime ideals, respectively. Some characterizations of prime and weakly prime left ideals are obtained. Moreover, the relationships between prime and weakly prime left ideals in nLA-rings...

Author(s):Pairote Yiarayong

Article in Press

Novel chemical sensor for adsorption of NH3 on graphene surface: A density functional theory (DFT) study

In this research, the effects of the Ni-doped, single vacancy (SV), double vacancy (DV), stone wells (STV) defects and electric-field (EF) on the adsorption of NH3 molecules on the surface of graphene are investigated by using the first-principles calculation. For this purpose, at first step we consider different configurations models, and then all selected models are optimized for this study. From optimized structures the...

Author(s):M. Rakhshi and M. Rezaei Sameti

Article in Press

Regression methods in the presence of heteroscedasticity and outliers

It has been observed over the years that real life data are usually non-conforming to the classical linear regression assumptions. One of the stringent assumptions that is unlikely to hold in many applied settings is that of homoscedasticity. When homogenous variance in a normal regression model is not appropriate, invalid standard inference procedure may result from the improper estimation of standard error when the...

Author(s):A. Adedayo Adepoju, Tayo P. Ogundunmade and Kayode B. Adebayo

Article in Press

Risk assessment of exposure to heavy metals in drinking water in Kilimambogo, Kenya

It is very crucial for man to use clean water for drinking, domestic use, agriculture, food production or other purposes, since it has a great impact on health. The concentration levels of Cu, Cd, Mn, Fe, Ni, Pb and Zn in borehole and surface water of Kilimambogo region were measured using the atomic absorption spectrometer (AAS). pH of the water samples was also measured on site using a digital pH standard meter. The...

Author(s):Catherine Nyambura, Nadir Omar Hashim and Margaret Wairimu Chege

Article in Press

Ex-vivo transdermal delivery of Annona squamosa entrapped in niosomes by electroporation

Reactive molecules derived from molecular oxygen and free radicals are commonly known as Reactive Oxygen Species (ROS). These molecules have been suggested to produce oxidative stress in cells leading to many pathological problems like diabetes, cancer, inflammation, neurodegenerative disorders, and aging. Antioxidants can remove free radicals from the human body. Therefore, it is of remarkable interest to increase the...

Author(s):Amr A. Abd-Elghany and Ebtsam A. Mohammad

Article in Press

Design of a narrowband pass unequal power divider using double splintered rectangular ring shape coupled lines with swastika shaped metamaterials (SWMTM)

This paper presents the design of a narrowband pass unequal power divider using double splintered rectangular ring shape coupled lines. The substrate material used between the power divider and the ground is of Rogers RT 5880 (lossy) with a relative permittivity of 2.2. The shape used in design makes the power divider more efficient. The device works at 5.9 GHz with the insertion loss of -3.4 dB at one port and -5.02 dB at...

Author(s):K. Viswanadha and N. S. Raghava

Article in Press

Liquid-liquid extraction of Zr(IV) from sulphuric acid medium using tri-n-octyl amine in kerosene

The extraction behaviour of Zr(IV) with tri-n-octyl amine (TOA) in kerosene has been studied through a novel method solvent extraction. The mechanism of extraction and the species extracted have been identified. Quantitative extraction of Zr(IV) with TOA was achieved in kerosene by changing different parameters such as acid variation, diluent effect, metal concentration variation, extractant variation, effect of chloride...

Author(s):J. Swain, A. Sahoo and B. C. Bhatta

Article in Press

Electro-generated low-band-gap conjugated polymer based on Benzothidiazole

Poly (4,7-bis(2,3-dihydrothieno[3,4-b][1,4]dioxin-5-yl)-2,1,3-benzothiadiazole) (PBEDT) a novel low – band – gap polymer has been synthesised by electro-polymerisation of a trimer composed of precursors ethylenedioxythiophene combined with 2,1,3-benzothiadiazole. The Ultraviolet–visible (UV-V) is spectrum of the trimer in chloroform solution gave two absorption bands with peaks at 323 nm and another at 482 nm with an onset...

Author(s):Athanasius Justin Mānji

Article in Press

Influence of the Reynolds number on the parietal exchanges of a paraboloidal retention pond full of water in forced convection

In this work, the authors study the influence of the Reynolds number on the heat and mass transfers in an interface air- water of a parabolic pond of retention full of water in forced convection. The free surface of the pond is crossed by a forced warm air. In the water, the vorticity-stream function is adopted. To resolve the equations in the air which are constituted by a mixture dry air and of steam, the hypotheses of...

Author(s):Pierre Faye, Mamadou Saliou Diallo, Mamadou Seck Gueye and Joseph Sarr

Article in Press

Solutions of the space-time fractional of some nonlinear systems of partial differential equations by using modified extended direct algebraic method

In this work, we handle the space – time fractional of classical Drinfeld's Sokolov – Wilson system, the fractional (2+1) – dimensional Davey–Stewartson system and the fractional generalized Hirota- Satsuma coupled KdV systemto solve analytically. Firstly, we use fractional traveling wave transformations to convert fractional nonlinear partial differential equations to nonlinear ordinary differential equations. Next,...

Author(s):A. R. Shehata and H. A. Kareem

Article in Press

The two-variable )-expansion method for solving the nonlinear potential Boussinesq and ZKBBM equations

We apply the two-variable )--expansion method to construct new exact traveling wave solutions with parameters of the nonlinear potential Boussinesq and ZKBBM equations. This method can be thought of as the generalization of the well-known )---expansion method given recently by Wang and co-workers (2008). When the parameters are replaced by special values, the well-known solitary wave solutions of this equation are...

Author(s):A. R. Shehata and J. A. A. AL-Nasrawi

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