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Akbarmehr J.,Islamic Azad University at Sarab
African Journal of Microbiology Research | Year: 2010

Salmonella serovars are one of the primary food-borne pathogens that cause infections in both animals and humans. The hyperinvasive locus A (hilA) gene has an important role in Salmonella pathogenicity. This gene encodes an ompR/ToxR transcriptional regulator that activates the expression of invasion gene and facilitates the entry of the bacteria into intestinal epithelial cells. Our goal of this research was to isolate Salmonella from poultry and detect their hilA gene by Polymerase Chain Reaction (PCR) technique. For this purpose 520 samples were obtained from ostrich, pigeon and chicken in poultry farms of East Azarbayjan province which is located in northwest of Iran. Samples were tested by bacteriological and serological tests. PCR was applied with one pair of primers targeting the Salmonella hilA gene. According to the results of bacteriological tests 45 Salmonella strains were found among 520 of total samples. The prevalence of Salmonella in ostrich, pigeon and chicken were determined as 6.66, 15.55, and 7.25%, respectively. Salmonella isolates represented four different serogroups (D1.B.C1, and C2) which Salmonella serogroup D1 was the most dominant serogroup. The PCR of the hilA gene produced a band of 854 bp with all the Salmonella isolates. This research indicated the relatively high prevalence of Salmonella spp in pigeon compare with ostrich and chicken and suggested that the hilA gene could be present in different Salmonella strains from different hosts in poultry. ©2010 Academic Journals. Source


Ghehsareh H.R.,Imam Khomeini International University | Soltanalizadeh B.,Payamenoor University | Soltanalizadeh B.,Islamic Azad University at Sarab | Abbasbandy S.,Imam Khomeini International University
International Journal of Computer Mathematics | Year: 2011

Recently, various sequential numerical schemes have been proposed for the solution of non-classical hyperbolic initial value problems which involve non-local integral terms over the spatial domain. In this paper, we focus on the wave equation with the non-local boundary condition. Two matrix formulation techniques based on the shifted standard and shifted Chebyshev bases are proposed for the numerical solution. Several numerical examples and also some comparisons with another methods will be investigated to confirm the efficiency of this procedure. © 2011 Taylor & Francis. Source


Soltanalizadeh B.,Islamic Azad University at Sarab
Optics Communications | Year: 2011

In this research a numerical technique is developed for the one-dimensional heat equation that combines classical and integral boundary conditions. New matrix formulation techniques with arbitrary polynomial bases are proposed for the numerical/analytical solution of this kind of partial differential equation. We give a simple and efficient algorithm based on an iterative process for numerical solution of the method. © 2010 Elsevier B.V. All rights reserved. Source


Aali S.,Islamic Azad University at Sarab
Journal of Electrical Engineering | Year: 2014

The unified power quality conditioner (UPQC) can be utilized to alleviate the fluctuations and improve the stability of the wind turbine. The fuzzy controller is able to handle non-linear and time varying systems. This paper presents application of the fuzzy controller in control system of the UPQC for stability enhancement of wind farm. A frequency-domain method based on a linearized system model using root locus, eigenvalue technique and a time-domain analysis based on nonlinear system model are both employed to verify the effectiveness of the proposed controller. It is validates the UPQC with proposed controller can enhance the stability margin in tested power system significantly and it has fast response. The proposed controller is robust and powerful for recovery of the bus voltage rather than UPQC with classic controller. Source


Akbarmehr J.,Islamic Azad University at Sarab
African Journal of Microbiology Research | Year: 2011

Ringworm is a fungal and zoonotic infectious disease, caused by different species of dermatophytes. Lesions of ringworm are usually found on the head, muzzle, ears, neck, and particularly, around the eyes of the infected animals. This study was conducted to determine the prevalence of cattle ringworm in native farms of Sarab city in Iran. A total number of 1150 cattle in native dairy farms of Sarab city were examined in this study from July 2007 till June 2008. The animals were classified into two age groups of less than 2 years and more than 2 years. Each animal was thoroughly examined for skin ringworm lesions, then, microscopic and culture examinations were carried out on samples obtained from ringworm lesions of infected animals. According to the results of this study among 1150 cattle, 188 of them (16.34%) were clinically positive for skin ringworm lesions. After microscopic and culture examinations, 150 animals (13.04%) were confirmed for dermatophyte infections. Trichophyton verrucosum was isolated in 100% of positive samples. The prevalence of ringworm among cattle less than 2 years and more than 2 years were 15 and 9% respectively, which showed significant difference between them. This study is the first research on the prevalence of cattle ringworm in Sarab city which indicated the relatively high prevalence of the disease and revealed the dominant role of T. verrucosom in cattle ringworm. © 2011 Academic Journals. Source

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