Academic Research Publishing Agency Press
International Journal of Research and Reviews in Applied Sciences
ISSN: 2076-734X, EISSN: 2076-7366

Volume 22, Issue 2(February, 2015)

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1. COMPARING THE COMPRESSIVE STRENGTHS OF CONCRETE MADE WITH RIVER SAND AND QUARRY DUST AS FINE AGGREGATES
by Chijioke Chiemela, Igwegbe E. Walter, Ibearugbulem H. Ogedi, Okoye C. Peter & Oke Mong
Abstract

Nowadays development of infrastructures is becoming number one priority in the world, particularly in the developing countries. So there are great demands within the construction industries for river sand as fine aggregate used in the production of concrete. This has created a very difficult situation; the cost of river sand has increased and also there is great fear from environmentalist and ecologist that in the future there may be scarcity of river sand and the environment and the ecology will be distorted. Hence, the need to find materials which are affordable and available to partially or totally replaced river sand in the production of concrete. This work is focused on the use of quarry dust as a total replacement to river sand in the production of concrete, and comparing the results (compressive strength) to that obtained from conventional concrete made with river sand.

Source: International Journal of Research and Reviews in Applied Sciences
February 2015-- Vol. 22 Issue 2 -- 2015

2. THREE-STEP ITERATIVE METHOD WITH FIFTH-ORDER CONVERGENCE FOR SOLVING MULTIPLE ROOTS OF NONLINEAR EQUATIONS

by Zhinan Wu

Abstract

This paper presents a three-step iterative method with fifth-order iterative convergence as a new modification of Newton’s method for finding multiple roots of nonlinear equations with unknown multiplicity  and for finding system of nonlinear equations. Its order of convergence is analyzed and proved. Results for some numerical examples show the efficiency of the new method.

Source: International Journal of Research and Reviews in Applied Sciences 
February 2015-- Vol. 22 Issue 2 -- 2015

3. CORROSION INHIBITION OF CARBON STEEL IN HYDROCHLORIC ACID SOLUTION BY SENNA-ITALICA EXTRACT
by Ameena Mohsen Al-Bonayan
Abstract

The potential of Senna-Italica extract as a corrosion inhibitor for carbon steel in 1 M HCl was determined using electrochemical frequency modulation (EFM), electrochemical impedance spectroscopy (EIS), potentiodynamic polarization and weight loss methods. Surface examination was tested using scanning electron microscope with energy dispersive X-ray spectroscopy (SEM–EDX). The adsorption process obeyed Freundlich adsorption isotherm. Maximum inhibition was attained 92.6% at the concentration of 600 ppm for senna-italica extract. Potentiodynamic polarization measurement studies revealed that senna-italica extract behave as a mixed-type inhibitor in 1 M HCl. The inhibition efficiencies of senna-italica extract obtained from the all various measurements were in good agreement.

Source: International Journal of Research and Reviews in Applied Sciences
February 2015-- Vol. 22 Issue 2 -- 2015

4. INVESTIGATING THE CAPACITY OF CRACKING TORSION OF CONCRETE PRISMATIC AND FILMY BEAMS WITH TRANSVERSE SPIRAL BARS

by Hadi Barghlame & M.A. Lotfollahi-Yaghin

Abstract

In this paper, the torsion capacity of cracking point on rectangular and shell like beams with spiral reinforcements in the torsion direction and its anti-direction are investigated. Also, the behavior of spirally-reinforced prismatic beams has been assessed. Therefore, models of above-mentioned beams have been numerically analyzed under various loads using ANSYS software. In this research, the operation of rectangular reinforced concrete beam is compared with the shell reinforced concrete beam. It was observed that, spirally-reinforced prismatic beam and beam with spiral links, show lower torsion capacity than beam with normal links also in anti-direction.

Source: International Journal of Research and Reviews in Applied Sciences 
February 2015-- Vol. 22 Issue 2 -- 2015

5. BANDWIDTH ENHANCEMENT OF THE CASCADED-CASCODE AMPLIFIER CONFIGURATION
by M.H. Ali & Aliyu Sisa Aminu
Abstract

The demand for additional gain and bandwidth at high frequency normally presents the need to cascade amplifying circuits. However cascading technique always has a drawback of shrinking bandwidth. Cascade-cascode amplifier is hereby modified to have an enhanced bandwidth through the application of negative feedback. Both the simulation and analysis of the proposed configuration shows significant improvement on the bandwidth.

Source: International Journal of Research and Reviews in Applied Sciences
February 2015-- Vol. 22 Issue 2 -- 2015

6. COMPARISON OF VIRAL LOAD OF TISSUE BRUSHING AND BLOOD RESULT BASED ON THE STADIUM OF NASOPHARYNGEAL CARCINOMA
by Eka Savitri & Sofia M. Haryana
Abstract

Nasopharyngeal carcinoma (NPC) is a malignancy that is most found in the ortholaryngology in Indonesia. Epstein Barr Virus (EBV) proved to be the cause of NPC and viral gene products most often found in Nasopharyngeal tissues with an increase of IgA antibody of titers of viral proteins (VCA-p18-1+EBNA) and in the majority of patients. Primary diagnostic is checked by non-invasive of blood and brushing of nasopharyngeal. The increase of plasma of EBV DNA load is an important marker of disease and for disease progress monitoring.

The objectives of the research: to compare between the plasma of EBV DNA load and viral load of tissue brushing in correlation with the stadium of nasopharyngeal cancer.

The method: 39 patients of NPC and 29 healthy as control were subjects in this study. Plasma of EBV DNA was examined by using RT-PCR.

Results : there was a positive correlation between plasma of EBV DNA and the viral load from tissue brushing. Brushing and blood for viral load and VCA interchangeable. Therefore, non-invasive methods using peripheral blood can be proposed to replace invasive methods of brushing both for viral Load and for VCA. 

Conclusion: it is as a marker for the presence of nasopharyngeal cancer and the progression of the disease.

Source: International Journal of Research and Reviews in Applied Sciences
February 2015-- Vol. 22 Issue 2 -- 2015













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