Seyed Hossein Hosseini - Academia.edu (original) (raw)
Papers by Seyed Hossein Hosseini
2013 21st Iranian Conference on Electrical Engineering (ICEE), 2013
Acta Scientiarum. Animal Sciences, 2017
In the present experiment, 320 one day old Ross 308 broiler chickens were used completely randomi... more In the present experiment, 320 one day old Ross 308 broiler chickens were used completely randomized design with 4 treatments, 4 replicates, and each replicate contained 20 broiler chickens. Experimental treatments include control, 0.5, 1, and 2% of Thymolina powder in chickens' diet. Thymolina ® is an antibacterial powder drug which is made by composing 4 medicinal plants. A significant difference observed between treatments in each parameter of the Intestinal morphology (villus height, villus width, crypt depth and epithelial thickness). Goblet cells number was not affected. Our findings indicated that using Thymolina ® in the diet of broiler chickens causes improvements in carcass characteristics. Therefore, it may improve the carcass characteristics and morphology of small intestine in broiler chickens.
The industrial revolution of the past century has resulted in significant damage to environmental... more The industrial revolution of the past century has resulted in significant damage to environmental resources such as air, water and soil. Petroleum contamination of soil is a serious problem throughout the oil producer countries. Remediation of petroleum contamination of soils is generally a slow and expensive process. Phytoremediation is a potentially less-damaging, cost-effective, but needs longer-term for remediation of contaminated land compared to the alternative methods. In this study the kinetics of petroleum hydrocarbon contaminated soils in Khozestan were investigated. For this paper Ryegrass (Lolium perenne) plant selected and the decline of total petroleum hydrocarbon (TPH) was analyzed after growth stage, every 10 days up to 90 days. The results of TPH concentration was fitted with zero-order kinetic, first-order kinetic and Higuchi model. The result indicated that degradation of TPH with presence of plants as a function of time was well fitted with the first-order kinetic model. The first-order rate constants (K) and half-lives (T 1/2) for TPH degradation were 0.0098 1/day and 71 day; respectively. The results of phytoremediation showed that there were 65% decreases in TPH concentration with Ryegrass during the 17 weeks.
Pubtexto, 2023
In this work, we synthesised and characterised the nanoporose polyaniline grafted on polyphosphaz... more In this work, we synthesised and characterised the nanoporose polyaniline grafted on polyphosphazen (PPh-g-PANI) through chemical and electrochemical polymerization. Organophosphorus thioesters (OPTEs) compounds such as parathion (PT) and chlorpyrifos (CPF) are organophosphorus insecticides that elicit acute toxicity by inhibiting acetylcholinesterase (AChE). Detection of OPTE compounds due to their wide applications in insecticides. This paper deals with the application of PPh-g-PANI as a sensor material to detect PT and CPF, which are commonly used as insecticides and pesticides. The polymeric structure was characterised by UV-V, which is spectroscopy. The electrical conductivity and morphology of the copolymer were investigated using the four-wire technique and scanning electron microscopy (SEM). Thermal properties were determined by thermogravimetric analysis (TGA) as well as differential scanning calorimetry (DSC).
Nanomanufacturing, 2023
In conventional chemical and electrochemical oxidation methods, it is very difficult to control t... more In conventional chemical and electrochemical oxidation methods, it is very difficult to
control the active centers, and the average prepared polymers are short and wide. The use of an
electric field creates the most stable intermediate form of active centers, as well as permitting a longer
half-life. Therefore, this increases the physical resistance and electrical conductivity of the polymer. In
this paper, polycarbazole nanofibers were prepared using an electric field, reporting on its influences
on the polymerization of carbazole. Therefore, its electrical conductivity and some physical properties
were investigated. We observed the nanofibers’ shape, increasing electrical conductivity, thermal
resistance and a higher molecular weight with the synthesized polycarbazole under an electric field
compared to the polymer synthesized in the same conditions in the absence of an electric field. First,
we chemically synthesized polycarbazole at different times. Additionally, to find the optimizing
conditions, we changed certain parameters, such as the ratio of the obtained molar of initiator to
monomer, the oxidant, initiator and solvent, separately, and compared the obtained results. Then,
we repeated this reaction in the best conditions and under different electric fields in constant time,
allowing us to characterize the shape, mass and conductivity. Next, the polymerization was carried
out at the best electric field in different times. Finally, the best time and amount of electric field for
polymerization were determined. The electrical conductivity of polycarbazoles was studied with the
four-probe method. The conductivity of the films oxidized using FeCl3 (dry) and protonated with
p-toluenesulfonic acid (PTSA) at 3 h was higher than 8.9 104 S/cm under a 12 KV/m electric field.
Additionally, the results showed an enhanced thermal resistance to ageing.
Asian Journal of Chemistry, 2014
The primary motivation for the study to develop simple eco-friendly green synthesis of silver nan... more The primary motivation for the study to develop simple eco-friendly green synthesis of silver nanoparticles using leaf extract of Eucalyptus citriodora as reducing and capping agent. The green synthesis process was quite fast and silver nanoparticles were formed within 0.5 h. The synthesis of the particles was observed by UV-visible spectroscopy by noting increase in absorbance. Characterization of the particles was carried out by X-ray diffraction, FTIR and electron microscopy. The developed nanoparticles demonstrated that E. citriodora is good source of reducing agents. UV-visible absorption spectra of the reaction medium containing silver nanoparticles showed maximum absorbance at 460 nm. FTIR analysis confirmed reduction of Ag + to Ag 0 atom in silver nanoparticles. The XRD pattern revealed the crystalline structure of silver nanoparticles. The SEM analysis showed the size and shape of the nanoparticles. The method being green, fast, easy and cost effective can be recommended for large scale production of AgNPs for their use in food, medicine and materials.
Iranian Journal of Microbiology, 2020
Background and Objectives: Chlamydia psittaci, an obligate intracellular, Gram-negative zoonotic ... more Background and Objectives: Chlamydia psittaci, an obligate intracellular, Gram-negative zoonotic pathogen, has eight serovars and nine genotypes isolated from avian species with higher frequency in parrots and pigeons. The aim of this study was to characterize Chlamydia spp. using nested PCR and sequencing. Materials and Methods: A total of 270 pharyngeal swab samples collected randomly from asymptomatic pigeons of 30 pigeon aviaries in Tehran province. DNA was extracted with specific kit and amplified by specific primers in the first PCR and outer membrane protein A (ompA) gene in the second PCR. Positive samples were sequenced and phylogenetic tree analyzed based on the ompA gene. Results: Records showed that 16 of 30 (53%) pigeon aviaries were positive for Chlamydia spp. Phylogenetic tree analysis revealed that 15 of 16 (93.7%) positive samples, belonged to C. psittaci genotype B whereas the other sample belonged to C. avium. C. psittaci detected in 50% of pigeon aviaries that i...
In the first step, nanoparticles (NPs) of BaTiO 3 and WO 3 were prepared as thermal infrared (TIR... more In the first step, nanoparticles (NPs) of BaTiO 3 and WO 3 were prepared as thermal infrared (TIR) absorbers, and in the second step, microwave-absorbing NPs of Ba 0.5 Sr 0.5 Fe 12 O 19 and Ba 0.2 Sr 0.2 La 0.6 MnO 3 were synthesized. All NPs were masked by polyacrylic acid (PAA). Finally, polyaniline (PANI) was prepared by in situ polymerization of aniline in the presence of all masked NPs. Since the masking layer is PAA, PANI was prepared as the polymerization template. The magnetic and electrical conducting properties of the resulting nanocomposites were measured using a vibrating-sample magnetometer and standard four-point probe, respectively. The synthesized nanocomposites were characterized by x-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectra. In addition, morphological analyses were performed by scanning electron microscopy (SEM). Thermal infrared (TIR) absorption and microwave reflection loss of nanocomposites were investigated at 10-40 μm and 8-18 GHz, respectively. The results showed that the [(BaTiO 3 /WO 3) 0.3-PAA-(Ba 0.2 Sr 0.2 La 0.6 MnO 3 /Ba 0.5 Sr 0.5 Fe 12 O 19) 0.3-PAA]-PANI 0.4 nanocomposite has good compatible electrical and magnetic properties and its absorption bandwidth under −10 dB is 10 GHz. The TIR image test showed better results with an increase in BaTiO 3 /WO 3 as a half-core and PANI as a final shell. The same increase takes place for microwave testing but with Ba 0.2 Sr 0.2 La 0.6 MnO 3 /Ba 0.5 Sr 0.5 Fe 12 O 19 as the half-core and PANI as the final shell.
IUBMB Life, 2019
The gene Nrf2 (nuclear factor-erythroid 2-related factor 2) is the most important regulator of th... more The gene Nrf2 (nuclear factor-erythroid 2-related factor 2) is the most important regulator of the cellular antioxidant system and its dysregulation has a role in the etiology of nonalcoholic fatty liver disease (NAFLD). The aim of this study was to investigate the association between Nrf2 targeted miRNAs (miR-27a, miR-142-5p, miR-153, and miR-128) with lipid accumulation in vitro and in vivo models of NAFLD. We used two in vivo and in vitro models of NAFLD. The expression of the genes and miRNAs was assessed by real-time PCR and the protein level was evaluated using western blot. To investigate the potential role of miRNAs in NAFLD, the inhibitors or mimics of the miR-27a and miR-142-5p were transfected into HepG2 cells. The mRNA and protein levels of Nrf2 were significantly decreased in the liver of high fat diet-fed mice as well as in HepG2 cells treated with high glucose (HG). Reduced expression of Nrf2 was associated with increased expression levels of miR-27a and miR-142-5p in both models of NAFLD. HG-induced triglyceride accumulation was attenuated by inhibition of miR-27a or miR-142-5p in HepG2 cells. Overexpression of miR-27a or miR-142-5p suppressed the expression of Nrf2 and its downstream antioxidant genes and increased production of reactive oxygen species, whereas inhibition of miR-27a or miR-142-5p reversed these effects. In conclusion, the data of this study may suggest that miR-27a and miR-142-5p are increased in NAFLD, where they suppress Nrf2 expression and contribute to the accumulation of lipids in the hepatocytes.
Iranian Journal of Virology, 2013
Case Report: Recently a 20-day-old layer flock with mortality has been submitted to the PCR Lab. ... more Case Report: Recently a 20-day-old layer flock with mortality has been submitted to the PCR Lab. Infectious Bronchitis Virus (IBV) has been detected in the clinical samples. Results: A phylogenetic tree based on a partial S1 gene sequence showed Iranian IBV variant located in LX4-type cluster. This cluster include all QXIBV-type detected in China and European countries. The highest sequence homology (> 99%) was found with that of a group of the Chinese QX but less similarity with European QX-like (>95%) and another Chinese QXIBV (>94%). Conclusion: Comparison of Nucleotides sequence with H120 and 4/91 IB vaccines shows only 76.9 and 79.7 identity, respectively.
Iranian Journal of Virology, 2015
Acta Veterinaria Hungarica, 2019
Mycoplasma gallisepticum (MG) causes chronic non-fatal diseases in the poultry industry with a re... more Mycoplasma gallisepticum (MG) causes chronic non-fatal diseases in the poultry industry with a remarkable decrease in feed consumption, egg production and other production indices. To study the genetic characteristics of MG isolates in commercial and backyard poultry flocks, 21 positive samples from different regions of Iran were analysed in the period 2012–2017. Typical macroscopic and histopathological lesions of the upper respiratory tract and lungs were found, similar to those reported by other researchers. A 298–361 bp part of the mgc2 gene was sequenced and analysed. Based on the phylogenetic analysis, the Iranian MG isolates fell into four distinct subgroups. The nucleotide difference between subgroups 1 and 4 was remarkable (91.6–94.9%). A 22-amino-acid insertion was present in two of the studied MG isolates, not observed in other vaccine and standard MG strains. The Iranian Veterinary Organisation (IVO) should consider the observed diversity of prevalent MG isolates from bo...
Iranian Journal of Virology, 2012
Veterinary Medicine and Science, 2016
Toxoplasmosis is a worldwide zoonosis caused by the parasitic protozoan Toxoplasma gondii. It can... more Toxoplasmosis is a worldwide zoonosis caused by the parasitic protozoan Toxoplasma gondii. It can infect all warm-blooded vertebrate species and causes abortions and birth defects in pregnant women and pregnant ewes. The objective of this study was to estimate the prevalence of infection with T. gondii in sheep meat in the region of Sidi Bouzid (central Tunisia) and Beja (northern Tunisia), the realization of a descriptive study of risk factors and the phylogenetic analyses of T. gondii. Neck muscle samples were obtained from 174 ewes and ewe lamb slaughtered in Sidi Bouzid and 150 lambs slaughtered in Beja. DNA was extracted from the samples using the Wizard â genomic DNA purification kit. A nested PCR using two pairs of primers (NN 1 and NN2, Tg-NP1 and Tg-NP2) were used to detect infection with T. gondii, which was then confirmed by sequencing. Eight T. gondii amplicons were sequenced (accession number KT896498) and deposited in GenBank. The T. gondii amplicons showed 97-100% identities with GenBank sequences. A phylogenetic tree was then constructed. The nested PCR detected T. gondii DNA in 31% of animals tested in Sidi Bouzid and 32% of lambs tested in Beja. No significant difference in the prevalence of T. gondii infection was established between the two tested regions. In both regions, no significant variation of the infection depending on age, breed and locality was found.
Veterinary Medicine and Science, 2016
Medical Archives, 2015
Background: Disorders of serum sodium concentration are some of the most electrolyte abnormalitie... more Background: Disorders of serum sodium concentration are some of the most electrolyte abnormalities in the intensive care unit (ICU) patients. These disorders adversely affect the function of vital organs and are associated with increased hospital mortality. Purpose: In the present study we aimed to evaluate the effects of serum sodium concentration abnormalities at the time of hospital admission on the clinical outcome of therapy in a cohort of critically ill poisoned patients. Methods: In this cross-sectional study, 184 critically ill poisoned patients aged >18 years and in the first 8 hours of their poisoning, hospitalized in the ICU of a tertiary care university hospital (Isfahan, Iran) between 2010-2012, were evaluated at the admission time and 24 hours later for serum sodium concentration abnormalities and its relationship with age, gender, consciousness status, ingested drugs and clinical outcome of therapy. The clinical outcome was considered as recovery and mortality. Logistic Regression analysis was performed for predictive variables including serum sodium concentration abnormalities in patients' clinical outcome. Findings: On admission, 152 patients (82.6%) were eunatremic, 21 patients (11.4%) were hyponatremic and 11 patients (6%) were hypernatremic. In the second day eunatremia, hyponatremia and hypernatremia was observed in 84.4%, 13% and 2.2% respectively. Age (OR=1.92; CI=1.18-3.12) and severity of toxicity (OR=1.32; CI=1.12-2.41) were predicting factors of mortality in ICU poisoning patients. Conclusions: Serum sodium concentration abnormalities are prevalent in critically ill poisoned patient but do not seem to have a predictive value for the clinical outcome of therapy.
International Journal of Power Electronics and Drive Systems (IJPEDS), 2014
Multilevel inverters with more number of levels can produce high quality voltage waveforms. In th... more Multilevel inverters with more number of levels can produce high quality voltage waveforms. In this paper, a new single-phase structure for multilevel voltage source inverter is proposed which can generate a large number of levels with reduced number of IGBTs, gate driver circuits and diodes. Three algorithms for determination of dc voltage sources' magnitudes are presented which provide odd and even levels at the output voltage waveform. A comparison is presented between proposed multilevel inverter and conventional cascade topology. The proposed topology is analyzed by the experimental and simulation results.
Neuropsychology, 2010
The relationship between personality characteristics and postconcussion symptoms in a nonclinical... more The relationship between personality characteristics and postconcussion symptoms in a nonclinical sample. Neuropsychology, 24(2), pp. 168-175.
Journal of Virological Methods, 1997
Background: Genotype analyses of avian reoviruses isolated from organ samples collected from chic... more Background: Genotype analyses of avian reoviruses isolated from organ samples collected from chickens with suspicious clinical symptoms, between 1997-2008, was based on sequences for both σC and σB genes and aligned with those published in the Genbank, making it possible to carry out studies of molecular classification and relationships. Methods: The full length of the known variable protein σC and part of the σB encoding genes, were amplified with RT-PCR, using conserved primers. PCR products were sequenced and the sequences were analyzed and aligned with avian reovirus sequences from the Genbank database. Results: The sequences of σC-encoding genes of all the isolated strains indicated their close relationship with the American, Chinese and Indian strains. Taking the American strain S1133 as a reference, the two Tunisian isolates 97.1 and 97.2 showed some nucleotide substitutions. For isolate 97.1, the substitution was silent whereas for strain 97.2 the mutation was at the first position of the corresponding codon and induced the substitution of the amino acid encoded. For the σB-encoding gene, the sequences of the Tunisian strains showed mutations at positions two or three of the corresponding codons, inducing substitutions of amino acids at these positions. The phylogenic trees based on σC and σB encoding genes indicated closer relationship between Tunisian, American and Taiwanese isolates of genotype I. Conclusion: Our study describes the genotype of avian reoviruses that are not yet well characterized genetically. The characterization and classification of these viruses might be significant for understanding the epidemiology of malabsorption syndrome and viral arthritis, and improving our knowledge of the genotype of strains circulating in Tunisian flocks. Furthermore, the study of their variable pathogenicity could be extremely important in the choice of the appropriate vaccine strain to control disease.
Electroanalysis, 2014
A carbon paste electrode (CPE) modified with ferrocenedicarboxylic acid (FCD) and carbon nanotube... more A carbon paste electrode (CPE) modified with ferrocenedicarboxylic acid (FCD) and carbon nanotubes (CNTs), was prepared for simultaneous determination of phenylhydrazine (PHZ) in the presence of hydrazine (HZ). The electrochemical response characteristics of the modified electrode toward PHZ and HZ were investigated by differential pulse voltammetry (DPV). The results showed an efficient catalytic role for the electro-oxidation of PHZ and HZ, leading to a remarkable peak resolution (∼200 mV) for two compounds. The mechanism of the modified electrode was analyzed by monitoring the CVs at various potential sweep rates and pHs of the buffer solutions. Under the optimum conditions, the calibration curve for PHZ was obtained in the range of 7.0×10 −8 to 9.0×10 −4 M. The prepared modified electrode shows several advantages such as simple preparation method, high sensitivity, long-time stability, ease of preparation and regeneration of the electrode surface by simple polishing and excellent reproducibility. The proposed method was applied to determination of PHZ and HZ in urine and water samples and the obtained results were satisfactory.
2013 21st Iranian Conference on Electrical Engineering (ICEE), 2013
Acta Scientiarum. Animal Sciences, 2017
In the present experiment, 320 one day old Ross 308 broiler chickens were used completely randomi... more In the present experiment, 320 one day old Ross 308 broiler chickens were used completely randomized design with 4 treatments, 4 replicates, and each replicate contained 20 broiler chickens. Experimental treatments include control, 0.5, 1, and 2% of Thymolina powder in chickens' diet. Thymolina ® is an antibacterial powder drug which is made by composing 4 medicinal plants. A significant difference observed between treatments in each parameter of the Intestinal morphology (villus height, villus width, crypt depth and epithelial thickness). Goblet cells number was not affected. Our findings indicated that using Thymolina ® in the diet of broiler chickens causes improvements in carcass characteristics. Therefore, it may improve the carcass characteristics and morphology of small intestine in broiler chickens.
The industrial revolution of the past century has resulted in significant damage to environmental... more The industrial revolution of the past century has resulted in significant damage to environmental resources such as air, water and soil. Petroleum contamination of soil is a serious problem throughout the oil producer countries. Remediation of petroleum contamination of soils is generally a slow and expensive process. Phytoremediation is a potentially less-damaging, cost-effective, but needs longer-term for remediation of contaminated land compared to the alternative methods. In this study the kinetics of petroleum hydrocarbon contaminated soils in Khozestan were investigated. For this paper Ryegrass (Lolium perenne) plant selected and the decline of total petroleum hydrocarbon (TPH) was analyzed after growth stage, every 10 days up to 90 days. The results of TPH concentration was fitted with zero-order kinetic, first-order kinetic and Higuchi model. The result indicated that degradation of TPH with presence of plants as a function of time was well fitted with the first-order kinetic model. The first-order rate constants (K) and half-lives (T 1/2) for TPH degradation were 0.0098 1/day and 71 day; respectively. The results of phytoremediation showed that there were 65% decreases in TPH concentration with Ryegrass during the 17 weeks.
Pubtexto, 2023
In this work, we synthesised and characterised the nanoporose polyaniline grafted on polyphosphaz... more In this work, we synthesised and characterised the nanoporose polyaniline grafted on polyphosphazen (PPh-g-PANI) through chemical and electrochemical polymerization. Organophosphorus thioesters (OPTEs) compounds such as parathion (PT) and chlorpyrifos (CPF) are organophosphorus insecticides that elicit acute toxicity by inhibiting acetylcholinesterase (AChE). Detection of OPTE compounds due to their wide applications in insecticides. This paper deals with the application of PPh-g-PANI as a sensor material to detect PT and CPF, which are commonly used as insecticides and pesticides. The polymeric structure was characterised by UV-V, which is spectroscopy. The electrical conductivity and morphology of the copolymer were investigated using the four-wire technique and scanning electron microscopy (SEM). Thermal properties were determined by thermogravimetric analysis (TGA) as well as differential scanning calorimetry (DSC).
Nanomanufacturing, 2023
In conventional chemical and electrochemical oxidation methods, it is very difficult to control t... more In conventional chemical and electrochemical oxidation methods, it is very difficult to
control the active centers, and the average prepared polymers are short and wide. The use of an
electric field creates the most stable intermediate form of active centers, as well as permitting a longer
half-life. Therefore, this increases the physical resistance and electrical conductivity of the polymer. In
this paper, polycarbazole nanofibers were prepared using an electric field, reporting on its influences
on the polymerization of carbazole. Therefore, its electrical conductivity and some physical properties
were investigated. We observed the nanofibers’ shape, increasing electrical conductivity, thermal
resistance and a higher molecular weight with the synthesized polycarbazole under an electric field
compared to the polymer synthesized in the same conditions in the absence of an electric field. First,
we chemically synthesized polycarbazole at different times. Additionally, to find the optimizing
conditions, we changed certain parameters, such as the ratio of the obtained molar of initiator to
monomer, the oxidant, initiator and solvent, separately, and compared the obtained results. Then,
we repeated this reaction in the best conditions and under different electric fields in constant time,
allowing us to characterize the shape, mass and conductivity. Next, the polymerization was carried
out at the best electric field in different times. Finally, the best time and amount of electric field for
polymerization were determined. The electrical conductivity of polycarbazoles was studied with the
four-probe method. The conductivity of the films oxidized using FeCl3 (dry) and protonated with
p-toluenesulfonic acid (PTSA) at 3 h was higher than 8.9 104 S/cm under a 12 KV/m electric field.
Additionally, the results showed an enhanced thermal resistance to ageing.
Asian Journal of Chemistry, 2014
The primary motivation for the study to develop simple eco-friendly green synthesis of silver nan... more The primary motivation for the study to develop simple eco-friendly green synthesis of silver nanoparticles using leaf extract of Eucalyptus citriodora as reducing and capping agent. The green synthesis process was quite fast and silver nanoparticles were formed within 0.5 h. The synthesis of the particles was observed by UV-visible spectroscopy by noting increase in absorbance. Characterization of the particles was carried out by X-ray diffraction, FTIR and electron microscopy. The developed nanoparticles demonstrated that E. citriodora is good source of reducing agents. UV-visible absorption spectra of the reaction medium containing silver nanoparticles showed maximum absorbance at 460 nm. FTIR analysis confirmed reduction of Ag + to Ag 0 atom in silver nanoparticles. The XRD pattern revealed the crystalline structure of silver nanoparticles. The SEM analysis showed the size and shape of the nanoparticles. The method being green, fast, easy and cost effective can be recommended for large scale production of AgNPs for their use in food, medicine and materials.
Iranian Journal of Microbiology, 2020
Background and Objectives: Chlamydia psittaci, an obligate intracellular, Gram-negative zoonotic ... more Background and Objectives: Chlamydia psittaci, an obligate intracellular, Gram-negative zoonotic pathogen, has eight serovars and nine genotypes isolated from avian species with higher frequency in parrots and pigeons. The aim of this study was to characterize Chlamydia spp. using nested PCR and sequencing. Materials and Methods: A total of 270 pharyngeal swab samples collected randomly from asymptomatic pigeons of 30 pigeon aviaries in Tehran province. DNA was extracted with specific kit and amplified by specific primers in the first PCR and outer membrane protein A (ompA) gene in the second PCR. Positive samples were sequenced and phylogenetic tree analyzed based on the ompA gene. Results: Records showed that 16 of 30 (53%) pigeon aviaries were positive for Chlamydia spp. Phylogenetic tree analysis revealed that 15 of 16 (93.7%) positive samples, belonged to C. psittaci genotype B whereas the other sample belonged to C. avium. C. psittaci detected in 50% of pigeon aviaries that i...
In the first step, nanoparticles (NPs) of BaTiO 3 and WO 3 were prepared as thermal infrared (TIR... more In the first step, nanoparticles (NPs) of BaTiO 3 and WO 3 were prepared as thermal infrared (TIR) absorbers, and in the second step, microwave-absorbing NPs of Ba 0.5 Sr 0.5 Fe 12 O 19 and Ba 0.2 Sr 0.2 La 0.6 MnO 3 were synthesized. All NPs were masked by polyacrylic acid (PAA). Finally, polyaniline (PANI) was prepared by in situ polymerization of aniline in the presence of all masked NPs. Since the masking layer is PAA, PANI was prepared as the polymerization template. The magnetic and electrical conducting properties of the resulting nanocomposites were measured using a vibrating-sample magnetometer and standard four-point probe, respectively. The synthesized nanocomposites were characterized by x-ray diffraction (XRD) and Fourier transform infrared (FTIR) spectra. In addition, morphological analyses were performed by scanning electron microscopy (SEM). Thermal infrared (TIR) absorption and microwave reflection loss of nanocomposites were investigated at 10-40 μm and 8-18 GHz, respectively. The results showed that the [(BaTiO 3 /WO 3) 0.3-PAA-(Ba 0.2 Sr 0.2 La 0.6 MnO 3 /Ba 0.5 Sr 0.5 Fe 12 O 19) 0.3-PAA]-PANI 0.4 nanocomposite has good compatible electrical and magnetic properties and its absorption bandwidth under −10 dB is 10 GHz. The TIR image test showed better results with an increase in BaTiO 3 /WO 3 as a half-core and PANI as a final shell. The same increase takes place for microwave testing but with Ba 0.2 Sr 0.2 La 0.6 MnO 3 /Ba 0.5 Sr 0.5 Fe 12 O 19 as the half-core and PANI as the final shell.
IUBMB Life, 2019
The gene Nrf2 (nuclear factor-erythroid 2-related factor 2) is the most important regulator of th... more The gene Nrf2 (nuclear factor-erythroid 2-related factor 2) is the most important regulator of the cellular antioxidant system and its dysregulation has a role in the etiology of nonalcoholic fatty liver disease (NAFLD). The aim of this study was to investigate the association between Nrf2 targeted miRNAs (miR-27a, miR-142-5p, miR-153, and miR-128) with lipid accumulation in vitro and in vivo models of NAFLD. We used two in vivo and in vitro models of NAFLD. The expression of the genes and miRNAs was assessed by real-time PCR and the protein level was evaluated using western blot. To investigate the potential role of miRNAs in NAFLD, the inhibitors or mimics of the miR-27a and miR-142-5p were transfected into HepG2 cells. The mRNA and protein levels of Nrf2 were significantly decreased in the liver of high fat diet-fed mice as well as in HepG2 cells treated with high glucose (HG). Reduced expression of Nrf2 was associated with increased expression levels of miR-27a and miR-142-5p in both models of NAFLD. HG-induced triglyceride accumulation was attenuated by inhibition of miR-27a or miR-142-5p in HepG2 cells. Overexpression of miR-27a or miR-142-5p suppressed the expression of Nrf2 and its downstream antioxidant genes and increased production of reactive oxygen species, whereas inhibition of miR-27a or miR-142-5p reversed these effects. In conclusion, the data of this study may suggest that miR-27a and miR-142-5p are increased in NAFLD, where they suppress Nrf2 expression and contribute to the accumulation of lipids in the hepatocytes.
Iranian Journal of Virology, 2013
Case Report: Recently a 20-day-old layer flock with mortality has been submitted to the PCR Lab. ... more Case Report: Recently a 20-day-old layer flock with mortality has been submitted to the PCR Lab. Infectious Bronchitis Virus (IBV) has been detected in the clinical samples. Results: A phylogenetic tree based on a partial S1 gene sequence showed Iranian IBV variant located in LX4-type cluster. This cluster include all QXIBV-type detected in China and European countries. The highest sequence homology (> 99%) was found with that of a group of the Chinese QX but less similarity with European QX-like (>95%) and another Chinese QXIBV (>94%). Conclusion: Comparison of Nucleotides sequence with H120 and 4/91 IB vaccines shows only 76.9 and 79.7 identity, respectively.
Iranian Journal of Virology, 2015
Acta Veterinaria Hungarica, 2019
Mycoplasma gallisepticum (MG) causes chronic non-fatal diseases in the poultry industry with a re... more Mycoplasma gallisepticum (MG) causes chronic non-fatal diseases in the poultry industry with a remarkable decrease in feed consumption, egg production and other production indices. To study the genetic characteristics of MG isolates in commercial and backyard poultry flocks, 21 positive samples from different regions of Iran were analysed in the period 2012–2017. Typical macroscopic and histopathological lesions of the upper respiratory tract and lungs were found, similar to those reported by other researchers. A 298–361 bp part of the mgc2 gene was sequenced and analysed. Based on the phylogenetic analysis, the Iranian MG isolates fell into four distinct subgroups. The nucleotide difference between subgroups 1 and 4 was remarkable (91.6–94.9%). A 22-amino-acid insertion was present in two of the studied MG isolates, not observed in other vaccine and standard MG strains. The Iranian Veterinary Organisation (IVO) should consider the observed diversity of prevalent MG isolates from bo...
Iranian Journal of Virology, 2012
Veterinary Medicine and Science, 2016
Toxoplasmosis is a worldwide zoonosis caused by the parasitic protozoan Toxoplasma gondii. It can... more Toxoplasmosis is a worldwide zoonosis caused by the parasitic protozoan Toxoplasma gondii. It can infect all warm-blooded vertebrate species and causes abortions and birth defects in pregnant women and pregnant ewes. The objective of this study was to estimate the prevalence of infection with T. gondii in sheep meat in the region of Sidi Bouzid (central Tunisia) and Beja (northern Tunisia), the realization of a descriptive study of risk factors and the phylogenetic analyses of T. gondii. Neck muscle samples were obtained from 174 ewes and ewe lamb slaughtered in Sidi Bouzid and 150 lambs slaughtered in Beja. DNA was extracted from the samples using the Wizard â genomic DNA purification kit. A nested PCR using two pairs of primers (NN 1 and NN2, Tg-NP1 and Tg-NP2) were used to detect infection with T. gondii, which was then confirmed by sequencing. Eight T. gondii amplicons were sequenced (accession number KT896498) and deposited in GenBank. The T. gondii amplicons showed 97-100% identities with GenBank sequences. A phylogenetic tree was then constructed. The nested PCR detected T. gondii DNA in 31% of animals tested in Sidi Bouzid and 32% of lambs tested in Beja. No significant difference in the prevalence of T. gondii infection was established between the two tested regions. In both regions, no significant variation of the infection depending on age, breed and locality was found.
Veterinary Medicine and Science, 2016
Medical Archives, 2015
Background: Disorders of serum sodium concentration are some of the most electrolyte abnormalitie... more Background: Disorders of serum sodium concentration are some of the most electrolyte abnormalities in the intensive care unit (ICU) patients. These disorders adversely affect the function of vital organs and are associated with increased hospital mortality. Purpose: In the present study we aimed to evaluate the effects of serum sodium concentration abnormalities at the time of hospital admission on the clinical outcome of therapy in a cohort of critically ill poisoned patients. Methods: In this cross-sectional study, 184 critically ill poisoned patients aged >18 years and in the first 8 hours of their poisoning, hospitalized in the ICU of a tertiary care university hospital (Isfahan, Iran) between 2010-2012, were evaluated at the admission time and 24 hours later for serum sodium concentration abnormalities and its relationship with age, gender, consciousness status, ingested drugs and clinical outcome of therapy. The clinical outcome was considered as recovery and mortality. Logistic Regression analysis was performed for predictive variables including serum sodium concentration abnormalities in patients' clinical outcome. Findings: On admission, 152 patients (82.6%) were eunatremic, 21 patients (11.4%) were hyponatremic and 11 patients (6%) were hypernatremic. In the second day eunatremia, hyponatremia and hypernatremia was observed in 84.4%, 13% and 2.2% respectively. Age (OR=1.92; CI=1.18-3.12) and severity of toxicity (OR=1.32; CI=1.12-2.41) were predicting factors of mortality in ICU poisoning patients. Conclusions: Serum sodium concentration abnormalities are prevalent in critically ill poisoned patient but do not seem to have a predictive value for the clinical outcome of therapy.
International Journal of Power Electronics and Drive Systems (IJPEDS), 2014
Multilevel inverters with more number of levels can produce high quality voltage waveforms. In th... more Multilevel inverters with more number of levels can produce high quality voltage waveforms. In this paper, a new single-phase structure for multilevel voltage source inverter is proposed which can generate a large number of levels with reduced number of IGBTs, gate driver circuits and diodes. Three algorithms for determination of dc voltage sources' magnitudes are presented which provide odd and even levels at the output voltage waveform. A comparison is presented between proposed multilevel inverter and conventional cascade topology. The proposed topology is analyzed by the experimental and simulation results.
Neuropsychology, 2010
The relationship between personality characteristics and postconcussion symptoms in a nonclinical... more The relationship between personality characteristics and postconcussion symptoms in a nonclinical sample. Neuropsychology, 24(2), pp. 168-175.
Journal of Virological Methods, 1997
Background: Genotype analyses of avian reoviruses isolated from organ samples collected from chic... more Background: Genotype analyses of avian reoviruses isolated from organ samples collected from chickens with suspicious clinical symptoms, between 1997-2008, was based on sequences for both σC and σB genes and aligned with those published in the Genbank, making it possible to carry out studies of molecular classification and relationships. Methods: The full length of the known variable protein σC and part of the σB encoding genes, were amplified with RT-PCR, using conserved primers. PCR products were sequenced and the sequences were analyzed and aligned with avian reovirus sequences from the Genbank database. Results: The sequences of σC-encoding genes of all the isolated strains indicated their close relationship with the American, Chinese and Indian strains. Taking the American strain S1133 as a reference, the two Tunisian isolates 97.1 and 97.2 showed some nucleotide substitutions. For isolate 97.1, the substitution was silent whereas for strain 97.2 the mutation was at the first position of the corresponding codon and induced the substitution of the amino acid encoded. For the σB-encoding gene, the sequences of the Tunisian strains showed mutations at positions two or three of the corresponding codons, inducing substitutions of amino acids at these positions. The phylogenic trees based on σC and σB encoding genes indicated closer relationship between Tunisian, American and Taiwanese isolates of genotype I. Conclusion: Our study describes the genotype of avian reoviruses that are not yet well characterized genetically. The characterization and classification of these viruses might be significant for understanding the epidemiology of malabsorption syndrome and viral arthritis, and improving our knowledge of the genotype of strains circulating in Tunisian flocks. Furthermore, the study of their variable pathogenicity could be extremely important in the choice of the appropriate vaccine strain to control disease.
Electroanalysis, 2014
A carbon paste electrode (CPE) modified with ferrocenedicarboxylic acid (FCD) and carbon nanotube... more A carbon paste electrode (CPE) modified with ferrocenedicarboxylic acid (FCD) and carbon nanotubes (CNTs), was prepared for simultaneous determination of phenylhydrazine (PHZ) in the presence of hydrazine (HZ). The electrochemical response characteristics of the modified electrode toward PHZ and HZ were investigated by differential pulse voltammetry (DPV). The results showed an efficient catalytic role for the electro-oxidation of PHZ and HZ, leading to a remarkable peak resolution (∼200 mV) for two compounds. The mechanism of the modified electrode was analyzed by monitoring the CVs at various potential sweep rates and pHs of the buffer solutions. Under the optimum conditions, the calibration curve for PHZ was obtained in the range of 7.0×10 −8 to 9.0×10 −4 M. The prepared modified electrode shows several advantages such as simple preparation method, high sensitivity, long-time stability, ease of preparation and regeneration of the electrode surface by simple polishing and excellent reproducibility. The proposed method was applied to determination of PHZ and HZ in urine and water samples and the obtained results were satisfactory.