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

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

Article in Press

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

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

Article in Press

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.

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

Article in Press

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

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

Article in Press

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

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

Article in Press

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.

Plastics: The good, the bad and the ugly

Article in Press

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.

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

Article in Press

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...

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

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

Article in Press

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.

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

Article in Press

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

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

Article in Press

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

Regression methods in the presence of heteroscedasticity and outliers

Article in Press

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

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

Article in Press

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

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

Article in Press

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

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

Article in Press

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

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

Article in Press

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...

Author(s):Athanasius Justin Mānji

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

Article in Press

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

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

Article in Press

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...

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

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

Article in Press

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

Page 2 of 2, showing 18 records out of 68 total, starting on record 51, ending on 68

12next >