Alnahrain University

Electronics, Iraq

Alnahrain University

Electronics, Iraq
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Alghurabie I.K.,University of Adelaide | Alghurabie I.K.,Alnahrain University | Hasan B.O.,Alnahrain University | Jackson B.,University of Adelaide | And 2 more authors.
Chemical Engineering Research and Design | Year: 2013

Steam gasification experiments were performed using a low-rank coal from South Australia, a marine microalga, and a blend of leached microalgal biomass and coal, in a spouted, fluidized bed reactor. The effect of different operating conditions - air-to-fuel ratio (A/F), steam-to-fuel ratio (S/F) and bed temperature (Tb) - on the producer gas composition was investigated. Producer gas compositions were analyzed and samples of bed material were also examined to identify ash components formed during each experiment. The optimum operating conditions for coal gasification, in this system, were identified to occur with A/F=1.82, S/F=0.75 and Tb=850°C. These conditions resulted in a producer gas with the highest heating value (per mass of fuel fed), the highest extent of carbon conversion and the optimum H2:CO ratio for Fischer-Tropsch synthesis. In addition, preliminary attempts to gasify a sun-dried marine microalga are reported. The dried biomass, sieved to 1.0-3.35mm, was gasified with air and steam. Preliminary experiments, utilizing the as-received biomass, proved unsuccessful due to rapid bed sintering. Leaching of the algal biomass to remove the extra-cellular salt and co-gasification of the resultant biomass (10wt%) with low-rank coal also proved unsuccessful due primarily to blockages of the downstream product lines most likely due to attrition of the algae feed in the screw feeder and elutriation from the bed. © 2013 The Institution of Chemical Engineers.

Hasan B.O.,Alnahrain University | Sadek S.A.,Alnahrain University
Journal of Industrial and Engineering Chemistry | Year: 2014

Corrosion of carbon steel in hydrochloric acid (HCl)-sodium sulphate (Na2SO4) solution mixture was investigated using rotating cylinder electrode (RCE) for a range of rotation velocity, 0-2000rpm, solution temperature of 32-52°C, and different oxygen concentrations. The corrosion rat was determined by using both weight loss method and electrochemical polarization technique. Different acid and salt concentrations were used ranged from 0.01 to 0.2M for salt and 0.5 to 5% for acid. The conjoint effect of increased oxygen concentration and high rotational velocity was studied based on experimental measurements of O2 concentration. The effects of operating conditions on indole and cetyl trimethyl ammonium bromides (CTAB) inhibition efficiency were also studied and discussed. The results showed that increasing the rotational velocity leads to an increase in the corrosion rate depending on the concentration of salt and acid. Increasing the temperature and acid concentrations leads to an increase in the corrosion rate while the corrosion rate exhibited unstable trend with salt concentration leads to change of corrosion. It is found that increasing O2 concentration leads to a considerable increase in the corrosion rates especially at high rotational velocity. Indole and CTAB inhibitors exhibited very good inhibition efficiency in most conditions investigated with the former exhibited better inhibition efficiency arriving up to 87% at low rotational velocities. The inhibition efficiency of both inhibitors was found to decrease with increasing velocity. In addition, indole inhibitor reveals excellent inhibition efficiency even at high temperatures while CTAB efficiency decreased appreciably with temperature increase. © 2013 The Korean Society of Industrial and Engineering Chemistry.

Al-Zwainy F.M.S.,Alnahrain University | Mohammed I.A.,University of Technology, Iraq | Raheem S.H.,University of Technology, Iraq
International Journal of Applied Engineering Research | Year: 2016

The aim of this study is investigation the impact of the application of project management methodologies in Iraqi construction sector. The importance of this study as new add for the fields of knowledge, it can be benefit for researchers in academic field and engineers in the practical field. The questionnaire form was designed by following a simple method, because the questionnaire as an important source of acquiring field information and data. The Iraqi Ministry of Construction and Housing and Public Municipalities was selected as a study population. Questionnaire content three axes. The first axis: (Personal data and information), The second axis:(assess the application of Project Management Methodology in Iraqi construction sector), and The third axis: (The reasons for the lack of application of international methodologies in the Iraqi project management), one of important of result this study is the main reason for the absence of a project management methodology in the company is lack of conviction and lack of interest of top management in project management methodology. Twenty five variables or reasons which effect on the PMM are presented. The highest ranked factor variables for factors influencing is V19 with relative importance (RI) of 77% first (1st), V1 was ranked second (2nd) with RI of 75%, V20was ranked third (3rd) with RI of 72% and others variables have relative importance from 60-69% (Very Important). © Research India Publications.

Raftari M.,University Putra Malaysia | Azizi Jalilian F.,University Putra Malaysia | Abdulamir A.S.,University Putra Malaysia | Abdulamir A.S.,Alnahrain University | And 4 more authors.
African Journal of Microbiology Research | Year: 2011

Varied mixtures of different concentrations 1, 1.5 and 2% of acetic (AA), lactic (LA), propionic (PA) and formic (FA) acids at 1:1 ratio were spray-washed on inoculated meat to evaluate their efficacy in reducing loads of Escherichia coli O157:H7 and Staphylococcus aureus on meat tissue. It was found that increasing the concentration of the used organic acids increased the bacterial lethality proportionally. And significant difference (P<0.05) was observed in the lethal effect of different mixtures and concentrations of the used organic acids. As a novel combination, FA treatments as combinations with AA, LA, and PA, especially FA with LA, reduced bacterial loads greatly, up to 3 logs cfu/ml and eradicated inoculated bacteria, E. coli O157:H7 and S. aureus completely within 3-6 days. This reduction was higher than that incurred by other combinations. Significantly, higher log reductions by the used organic acids were obtained for S. aureus than for E. coli O157:H7. It was concluded that the combination of LA and FA treatment was a highly promising, feasible, and economical method of decontaminating meat surface from both E. coli O157:H7 and S. aureus bacteria. Moreover, it is safe if compared with other approaches. © 2011 Academic Journals.

Jweeg M.J.,Alnahrain University | Hammood A.S.,University of Kufa | Al-Waily M.,University of Kufa
International Journal of Mechanical and Mechatronics Engineering | Year: 2012

The existence of a defect like a crack will leads to change in natural frequency of the plate and enlargement of the crack will also lead another change in natural frequency with the change of the size or position of the crack. So this study focuses on finding the natural frequency for isotropic composite plates with crack considering the size of the crack (crack length and depth through plate thickness) an crack position in the plate in x, y directions, also slant of the crack. The natural frequency is studied for composite material strengthen by powder, and short fibers with the effect of crack size and position, plate thickness, aspect ratio, the type of plate fixing where three type of fixing used (SSSS, SSCC, SSFF). Two methods are used to find the natural frequency of composite plate: First method is supposed analytical solution to solve the equation of motion considering the effect of size, and position crack on the natural frequency of the composite plate. Second method is finite element solution using ANSYS (ver. 14) program. A comparison made between the two methods and the error percentage is not exceeds of 3.5%. The results shows that the natural frequency decreases as crack size (length or width) increases. The natural frequency decreases when the crack in the middle of the plate over any position of the crack. The effect of crack when it reaches the middle is higher than when it's in the other places. The natural frequency is decreases as plate width increases, (aspect ratio and plate thickness). © October 2012.

Raheemah A.,University Malaysia Perlis | Raheemah A.,Al Muthanna University | Sabri N.,University Malaysia Perlis | Salim M.S.,Alnahrain University | And 2 more authors.
Computers and Electronics in Agriculture | Year: 2016

Signal propagation losses in protected environments are investigated using wireless sensor networks (WSNs) based on the IEEE 802.15.4 standard of operating frequency, 2.425 GHz. In this research, various empirical measurements were conducted to examine the effects of each part of a tree on path loss using different transceiver heights. A new linear path loss regression curve-fitting model (LRCFM) was derived based on the regression technique of computing the total path loss inside the greenhouse environment. The greatest vegetation effects appear within 1.5 m tree height; in this research, this height was adopted to study and analyse vegetation models in a mango greenhouse. This research proves that path loss prediction based on free space path loss (FSPL) and two-ray (2-Ray) propagation models is inaccurate in predicting loss in certain environments, as these approaches are simplistic and optimistic. Thus, most known foliage models used in conjugation with FSPL and 2-Ray are inaccurate in predicting the total path loss in a greenhouse environment. The analytical and empirical results prove that the new derived model, the LRCFM, is the best candidate compared to other foliage models. The mean absolute percentage error (MAPE) of the total path loss based on the new LRCFM model was 2.7% compared to the 10.69% of the well-known models. © 2016

Abdulamir A.S.,University Putra Malaysia | Abdulamir A.S.,Alnahrain University | Hafidh R.R.,University Putra Malaysia | Hafidh R.R.,University of Baghdad | Abu Bakar F.,University Putra Malaysia
Cancer Therapy | Year: 2013

This review aims at discussing the role of Salmonella bacteria as anti-cancer agent against solid and semi-solid tumors. In addition, Salmonella bacteria have been used as a successful bacterial vector for cytotoxic moieties, apoptotic inducers, prodrug enzymes, cytokines, chemokines, tumor associated antigens, DNA and RNA antisense or vaccine fragments. The best strain found as anticancer agent was S. Typhimurium this is due to its low pathogenicity and high tolerability in animals and humans. S. Typhimurium has been thoroughly researched in the last three decades. Genetically modified and attenuated S. Typhimurium has been designed as direct tumoricidal agent or as a vector for additional anticancer agents. Hence, in this review, we discuss the role of bacteria, in general, as anticancer agent, the tumoricidal activity of Salmonella used in monotherapy, the homing and specificity of Salmonella to tumor cells rather than normal cells, the role of Salmonella as a vector for different anticancer and oncolytic agents, and the use of this bacteria in cancer immunotherapy.

Bakar F.A.,University Putra Malaysia | Abdulamir A.S.,University Putra Malaysia | Abdulamir A.S.,Alnahrain University | Nordin N.,University Putra Malaysia | Yoke T.S.,University Putra Malaysia
Biotechnology | Year: 2010

Lactobacillus sp. is probiotic bacteria for which many detection methods were envisaged. However, culture-based methods failed to achieve specific detection of this bacterium due to its presence in mixed bacterial complex communities. The PCR assay was optimized to detect and quantify Lactobacillus sp. specifically in complex microbial community of mixed bacteria. Four DNA extraction methods, DNA integrity, primers specificity and optimized PCR procedure were all tested. It was shown that extracted genomic DNA using Wizard® Genomic DNA Purification Kit showed the highest yield, quality and performance in gel electrophoresis. Moreover, the specificity of the primer set, Lacto-16S-F/Lacto-16S-R, specific for Lactobacillus sp. was checked and found highly specific. In conclusion, the best DNA extraction protocol, working specific primer set and working PCR assay were achieved for achieving efficient, specific and reliable molecular-based, culture-independent, method of detection of lactobacillus sp. in PCR-suppressor highly protein-complex environment of mixed bacteria community. © 2010 Asian Network for Scientific Information.

PubMed | Isfahan University of Technology, Alnahrain University, University of Baghdad and Isfahan University of Medical Sciences
Type: | Journal: Advanced biomedical research | Year: 2015

Chicken antibodies have many advantages to the mammalian antibodies and have several important differences against mammalian IgG with regard to their specificity and large-scale production. In this study, the production, purification, and HRP conjugation of polyclonal IgY against hepatitis virus surface antigen (HBsAg) were carried out.Single Comb White Leghorn hens were immunized intramuscularly with hepatitis B vaccine in combination with Freunds adjuvants. Blood and eggs were collected before and during ten weeks after the first immunization.A highly purified of 180 KDa with specific activity of 200 mIU/ml was obtained by our purification protocol. One milligram of the purified IgY was labeled with horseradish peroxidase (HRP). Sandwich ELISA was used to determine the optimum titer of anti-HbsAg IgY-conjugate which was found to be 1:20.This study showed that laying hens can be used as an alternative source for production of polyclonal antibodies against HBsAg and anti-HBs IgY could be labeled with HRP enzyme and could subsequently be used successfully as secondary antibody in ELISA for detection of HBsAg in the patients sera.

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