1
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Ebrahimi M, Dabbagh A, Madadi F. Propofol-induced hippocampal Neurotoxicity: A mitochondrial perspective. Brain Res 2024; 1831:148841. [PMID: 38428475 DOI: 10.1016/j.brainres.2024.148841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2024] [Revised: 02/25/2024] [Accepted: 02/27/2024] [Indexed: 03/03/2024]
Abstract
Propofol is a frequently used anesthetic. It can induce neurodegeneration and inhibit neurogenesis in the hippocampus. This effect may be temporary. It can, however, become permanent in vulnerable populations, such as the elderly, who are more susceptible to Alzheimer's disease, and neonates and children, whose brains are still developing and require neurogenesis. Current clinical practice strategies have failed to provide an effective solution to this problem. In addition, the molecular mechanism of this toxicity is not fully understood. Recent advances in molecular research have revealed that apoptosis, in close association with mitochondria, is a crucial mechanism through which propofol contributes to hippocampal toxicity. Preventing the toxicity of propofol on the hippocampus has shown promise in in-vivo, in-vitro, and to a lesser extent human studies. This study seeks to provide a comprehensive literature review of the effects of propofol toxicity on the hippocampus via mitochondria and to suggest translational suggestions based on these molecular results.
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Affiliation(s)
- Moein Ebrahimi
- Department of Anesthesiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Dabbagh
- Department of Anesthesiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Firoozeh Madadi
- Department of Anesthesiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Anesthesiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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2
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Ebrahimi M, Sivaprasad S. The potential effects of newer groups of glucose lowering drugs on age-related macular degeneration. Eye (Lond) 2024:10.1038/s41433-024-03066-5. [PMID: 38605074 DOI: 10.1038/s41433-024-03066-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2023] [Revised: 03/27/2024] [Accepted: 04/04/2024] [Indexed: 04/13/2024] Open
Affiliation(s)
- Moein Ebrahimi
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Network of Immunity in Infection, Malignancy, and Autoimmunity, Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Sobha Sivaprasad
- NIHR Moorfields Biomedical Research Centre, Moorfields Eye Hospital, London, UK.
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3
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Ebrahimi M, Ebrahimi M, Vergroesen JE, Aschner M, Sillanpää M. Environmental exposures to cadmium and lead as potential causes of eye diseases. J Trace Elem Med Biol 2024; 82:127358. [PMID: 38113800 DOI: 10.1016/j.jtemb.2023.127358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/04/2023] [Accepted: 12/06/2023] [Indexed: 12/21/2023]
Abstract
Humans are exposed to cadmium and lead in various regions of the world daily due to industrial development and climate change. Increasing numbers of preclinical and clinical studies indicate that heavy metals, such as cadmium and lead, play a role in the pathogenesis of eye diseases. Excessive exposure to heavy metals such as cadmium and lead can increase the risk of impaired vision. Therefore, it is essential to better characterize the role of these non-essential metals in disease etiology and progression. This article discusses the potential role of cadmium and lead in the development of age-related eye diseases, including age-related macular degeneration, cataracts, and glaucoma. Furthermore, we discuss how cadmium and lead affect ocular cells and provide an overview of putative pathological mechanisms associated with their propensity to damage the eye.
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Affiliation(s)
- Moein Ebrahimi
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran; Network of Immunity in Infection, Malignancy, and Autoimmunity, Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Maryam Ebrahimi
- Cancer Immunology Project (CIP), Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Joëlle E Vergroesen
- Department of Ophthalmology, Erasmus MC University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands; Department of Epidemiology, Erasmus MC University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands.
| | - Michael Aschner
- Department of Molecular Pharmacology, Albert Einstein College of Medicine, Bronx, NY 10461, USA
| | - Mika Sillanpää
- Department of Chemical Engineering, School of Mining, Metallurgy and Chemical Engineering, University of Johannesburg, P. O. Box 17011, Doornfontein 2028, South Africa; International Research Centre of Nanotechnology for Himalayan Sustainability (IRCNHS), Shoolini University, Solan 173212, Himachal Pradesh, India; Zhejiang Rongsheng Environmental Protection Paper Co. LTD, NO.588 East Zhennan Road, Pinghu Economic Development Zone, Zhejiang 314213, PR China; Department of Civil Engineering, University Centre for Research & Development, Chandigarh University, Gharuan, Mohali, Punjab, India
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4
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Ebrahimi M, Thompson P, Lauer AK, Sivaprasad S, Perry G. The retina-brain axis and diabetic retinopathy. Eur J Ophthalmol 2023; 33:2079-2095. [PMID: 37259525 DOI: 10.1177/11206721231172229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Diabetic retinopathy (DR) is a major contributor to permanent vision loss and blindness. Changes in retinal neurons, glia, and microvasculature have been the focus of intensive study in the quest to better understand DR. However, the impact of diabetes on the rest of the visual system has received less attention. There are reports of associations of changes in the visual system with preclinical and clinical manifestations of diabetes. Simultaneous investigation of the retina and the brain may shed light on the mechanisms underlying neurodegeneration in diabetics. Additionally, investigating the links between DR and other neurodegenerative disorders of the brain including Alzheimer's and Parkinson's disease may reveal shared mechanisms for neurodegeneration and potential therapy options.
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Affiliation(s)
- Moein Ebrahimi
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Network of Immunity in Infection, Malignancy, and Autoimmunity, Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Paul Thompson
- Imaging Genetics Center, Mark and Mary Stevens Institute for Neuroimaging and Informatics, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Andreas K Lauer
- Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, Oregon, USA
| | - Sobha Sivaprasad
- National Institute of Health and Care Research Moorfields Biomedical Research Centre, Moorfields Eye Hospital, London, UK
| | - George Perry
- Department of Neuroscience, Developmental and Regenerative Biology, University of Texas and San Antonio, San Antonio, TX, USA
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5
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Ebrahimi M, Sivaprasad S, Thompson P, Perry G. Retinal Neurodegeneration in Euglycemic Hyperinsulinemia, Prediabetes, and Diabetes. Ophthalmic Res 2022; 66:385-397. [PMID: 36463857 DOI: 10.1159/000528503] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 11/23/2022] [Indexed: 12/23/2023]
Abstract
Diabetic retinopathy (DR) is a challenging public health problem mainly because of its growing prevalence and risk of blindness. In general, our current knowledge and practice have failed to prevent the onset or progression of DR to sight-threatening complications. While there are treatment options for sight-threatening complications of DR, it is crucial to pay more attention to the early stages of DR to decrease its prevalence. Growing evidence suggests many pathologic changes occur before clinical presentations of DR in euglycemic hyperinsulinemia, prediabetes, and diabetes. These pathological changes occur in retinal neurons, glia, and microvasculature. A new focus on these preclinical pathologies - especially on hyperinsulinemia - may provide further insight into disease mechanisms, endpoints for clinical trials, and druggable targets in early disease. Here, we review the current evidence on the pathophysiological changes reported in preclinical DR and appraise preventive and treatment options for DR.
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Affiliation(s)
- Moein Ebrahimi
- Network of Immunity in Infection, Malignancy, and Autoimmunity, Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Sobha Sivaprasad
- NIHR Moorfields Biomedical Research Centre, Moorfields Eye Hospital, London, UK
| | - Paul Thompson
- Imaging Genetics Center, Mark and Mary Stevens Institute for Neuroimaging and Informatics, Keck School of Medicine, University of Southern California, Los Angeles, California, USA
| | - George Perry
- Department of Biology, University of Texas and San Antonio, San Antonio, Texas, USA
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6
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Ebrahimi M, Mara L, Parham A, Dattena M. Mineral Oil for in vitro Embryo Production: What We Should Know? Arch Razi Inst 2022; 77:1325-1330. [PMID: 36883153 PMCID: PMC9985784 DOI: 10.22092/ari.2022.358955.2343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 06/11/2022] [Indexed: 03/09/2023]
Abstract
Mineral oil as a barrier can minimize temperature, osmolality, and pH fluctuation of the media in the in vitro embryo production system (IVP). Regardless of these advantages, mineral oil quality is varied and may deteriorate during storage or transport conditions. So, it can affect the IVP outcome by absorbing the essentials factors or realizing the toxic components into the media. Although, some methods have already been developed to reduce these side effects, still there is a big concern about the safety and use of mineral oil in the IVP system. In this review, we provided an overview of the advantages and disadvantages of using mineral oil in the IVP system. We also reviewed available methods for its quality control and finally, we introduced some methods for reducing the side effects of mineral oil.
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Affiliation(s)
- M Ebrahimi
- Department of Basic Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.,Department of Animal Science, Agricultural Research Agency of Sardinia, 07100 Sassari, Italy
| | - L Mara
- Department of Animal Science, Agricultural Research Agency of Sardinia, 07100 Sassari, Italy
| | - A Parham
- Department of Basic Sciences, Faculty of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, Iran.,Stem Cell Biology and Regenerative Medicine Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran
| | - M Dattena
- Department of Animal Science, Agricultural Research Agency of Sardinia, 07100 Sassari, Italy
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7
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Ebrahimi M, Balibegloo M, Rezaei N. Monoclonal antibodies in diabetic retinopathy. Expert Rev Clin Immunol 2022; 18:163-178. [PMID: 35105268 DOI: 10.1080/1744666x.2022.2037420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
INTRODUCTION Diabetic retinopathy (DR), as one of the main complications of diabetes, is among the leading causes of blindness and visual impairment worldwide. AREAS COVERED Current clinical therapies include photocoagulation, vitrectomy, and anti-vascular endothelial growth factor (VEGF) therapies. Bevacizumab and ranibizumab are two monoclonal antibodies (mAbs) inhibiting angiogenesis. Intravitreal ranibizumab and bevacizumab can decrease the rate of blindness and retinal thickness, and improve visual acuity whether as monotherapy or combined with other treatments. They can increase the efficacy of other treatments and decrease their adverse events. Although administered intravitreally, they also might enter the circulation and cause systemic effects. This study is aimed to review our current knowledge about mAbs, bevacizumab and ranibizumab, in DR including superiorities, challenges, and limitations. Meanwhile, we tried to shed light on new ideas to overcome these limitations. Our latest search was done in April 2021 mainly through PubMed and Google Scholar. Relevant clinical studies were imported. EXPERT OPINION Future direction includes detection of more therapeutic targets considering other components of DR pathophysiology and shared pathogenesis of DR and neurodegenerative diseases such as Parkinson's disease and Alzheimer's disease, the treat-and-extend regimen, and new ways of drug delivery and other routes of ocular drug administration.
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Affiliation(s)
- Moein Ebrahimi
- School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran.,Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA),Universal Scientific Education and Research Network (USERN), Tehran, Iran
| | - Maryam Balibegloo
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA),Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nima Rezaei
- Network of Immunity in Infection, Malignancy and Autoimmunity (NIIMA),Universal Scientific Education and Research Network (USERN), Tehran, Iran.,Research Center for Immunodeficiencies, Children's Medical Center, Tehran University of Medical Sciences, Tehran, Iran.,Department of Immunology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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8
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Ebrahimi M, Khalesi B, Mansouri Daneshvar MR. Driving powers of the globalization on the urban ecology, a comparative study. Environ Syst Res (Heidelb) 2021; 10:40. [PMID: 34926124 PMCID: PMC8666833 DOI: 10.1186/s40068-021-00244-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Accepted: 12/02/2021] [Indexed: 06/14/2023]
Abstract
BACKGROUND The present study investigates the driving effects of globalization on the urban environment in two countries of Italy and Japan, which have the regular amplified economy among the advanced countries. For this purpose, a model with the collaboration of two main subjects of globalization coverage and urbanization and the methodological procedures of correlation test and structural analysis was constructed. A globalization index, namely the Maastricht globalization index (MGI), was assumed based on the integrated values of ten factors [HDI, ITA, GDP, FDI, TEI, GEE, GME, MCS, and IUI] besides three ecological indicators as the baseline of the urban environment, namely carbon dioxide emission (CDE), municipal solid wastes (MSW), and wastewater treatment plants (WTP). RESULTS Results revealed the positive associations between globalization and wastewater treatment of urban areas in both countries, exposing the influential role of globalization in connecting the urban population to the sewage plants. The results confirmed the positive role of globalization in decreasing carbon dioxide emissions and overall its practical influences to mitigate urban air pollution. However, the overall globalization effect on urban waste production was estimated differently in both countries. CONCLUSIONS Based on the MICMAC analysis, only three factors, namely HDI, ITA, GDP, and FDI, can express driving powers and a significant share of globalization coverage. Consequently, enhancing such indicators that belong to globalization's social and economic domains certainly can act as driver powers to mitigate the environmental issues of urbanization in the study areas.
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Affiliation(s)
- M. Ebrahimi
- Department of Physical Geography, Hakim Sabzevari University, Sabzevar, Iran
| | - B. Khalesi
- Department of Urban Planning and Design, Mashhad Branch, Islamic Azad University, Mashhad, Iran
| | - M. R. Mansouri Daneshvar
- Department of Geography and Natural Hazards, Research Institute of Shakhes Pajouh, Isfahan, Iran
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9
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Mansouri Daneshvar MR, Ebrahimi M, Sadeghi A, Mahmoudzadeh A. Climate effects on the COVID-19 outbreak: a comparative analysis between the UAE and Switzerland. ACTA ACUST UNITED AC 2021; 8:469-482. [PMID: 33521243 PMCID: PMC7822754 DOI: 10.1007/s40808-021-01110-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 01/05/2021] [Indexed: 02/06/2023]
Abstract
The main aim of the present study is to disclose the similarities or differences of the climate effects on the COVID-19 outbreak in two countries, which have different climatic conditions. Using the correlation modeling, the results revealed that some climatic factors, such as the ULR, temperature, and CH4 in the UAE and aerosol index and NO2 in Switzerland have positive lagged correlations with the outburst of COVID-19 by intensifying role within − 9, − 7, and − 2 days. The mitigating role was also observed for ozone/solar radiation and temperature/long-wave radiation in the UAE and Switzerland, respectively. The initial hypotheses of the research have confirmed the correlations between new cases of COVID-19 and ULR and aerosol indices in the UAE and Switzerland. However, the main finding revealed that the climate effects on the COVID-19 outbreak show different roles in the different countries, locating in dissimilar climatic zones. Accordingly, the COVID-19 can be intensified by increases of the ULR and temperature in an arid region, while it can be exactly mitigated by increases of these factors in a temperate area. This finding may be useful for future researches for identifying the essential influencing factors for the mitigating COVID-19 outbreak.
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Affiliation(s)
- M R Mansouri Daneshvar
- Department of Geography and Natural Hazards, Research Institute of Shakhes Pajouh, Isfahan, Iran
| | - M Ebrahimi
- Department of Physical Geography, Hakim Sabzevari University, Sabzevar, Iran
| | - A Sadeghi
- Department of Humanities and Social Science, Farhangian University, Tehran, Iran
| | - A Mahmoudzadeh
- Head of Departments and Chancellor, Research Institute of Shakhes Pajouh, Isfahan, Iran
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10
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Zarei F, Kia HD, Masoudi R, Moghaddam G, Ebrahimi M. Supplementation of ram's semen extender with Mito-TEMPO I: Improvement in quality parameters and reproductive performance of cooled-stored semen. Cryobiology 2020; 98:215-218. [PMID: 33152325 DOI: 10.1016/j.cryobiol.2020.10.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2020] [Revised: 10/28/2020] [Accepted: 10/29/2020] [Indexed: 12/19/2022]
Abstract
Supplementation of cooling medium with some antioxidants could be a helpful way to improve sperm quality during chilling process. The current study was aimed to assess the influence of using Mito-TEMPO in cooling medium on quality parameters and reproductive performance of sheep semen during chilling process. In this study, diluted semen samples were assigned into 5 parts, and received 0, 0.5, 5, 50 and 500 μM Mito-TEMPO. The prepared samples were stored at 5 °C up to 48 h. Chilled sperm motility, viability, abnormal morphology, mitochondrial membrane potential, membrane functionality and malondialdehyde concentration were assessed during 0, 24 and 48 h. For evaluation of reproductive performance, artificial insemination was performed via 24 h-chilled semen. In results, at time 0, no difference was observed among groups. Using 5 and 50 μM Mito-TEMPO resulted in higher (P ≤ 0.05) cooled sperm total motility, progressive motility, membrane functionality, viability and lower malondialdehyde concentration than the other groups during 24 and 48 h storage. The rate of mitochondrial membrane potential was greater (P ≤ 0.05) in treated groups with 5, 50 and 500 μM Mito-TEMPO. Pregnancy, parturition and lambing rates were higher (P ≤ 0.05) when ewes were inseminated with 24 h-chilled semen samples containing 5 and 50 μM Mito-TEMPO compared to the control group. Therefore, supplementation of cooling medium with Mito-TEMPO (5 and 50 μM) could be an efficient method to improve the quality and reproductive efficiency of ram's cooled semen during storage period.
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Affiliation(s)
- F Zarei
- Department of Animal Science, College of Agriculture, University of Tabriz, Tabriz, Iran
| | - H Daghigh Kia
- Department of Animal Science, College of Agriculture, University of Tabriz, Tabriz, Iran.
| | - R Masoudi
- Animal Science Research Institute of Iran (ASRI), Agricultural Research Education and Extension Organization (AREEO), Karaj, Iran.
| | - G Moghaddam
- Department of Animal Science, College of Agriculture, University of Tabriz, Tabriz, Iran
| | - M Ebrahimi
- Department of Animal Science, College of Agriculture, University of Tabriz, Tabriz, Iran
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11
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Ali-Begloui M, Salehghamari E, Sadrai S, Ebrahimi M, Amoozegar MA, Salehi-Najafabadi A. Biotransformation of Trinitrotoluene (TNT) by Newly Isolated Slight Halophilic Bacteria. Microbiology (Reading) 2020. [DOI: 10.1134/s0026261720050033] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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12
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Galeotti G, De Marchi F, Hamzehpoor E, MacLean O, Rajeswara Rao M, Chen Y, Besteiro LV, Dettmann D, Ferrari L, Frezza F, Sheverdyaeva PM, Liu R, Kundu AK, Moras P, Ebrahimi M, Gallagher MC, Rosei F, Perepichka DF, Contini G. Synthesis of mesoscale ordered two-dimensional π-conjugated polymers with semiconducting properties. Nat Mater 2020; 19:874-880. [PMID: 32424372 DOI: 10.1038/s41563-020-0682-z] [Citation(s) in RCA: 103] [Impact Index Per Article: 25.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 04/14/2020] [Indexed: 05/08/2023]
Abstract
Two-dimensional materials with high charge carrier mobility and tunable band gaps have attracted intense research effort for their potential use in nanoelectronics. Two-dimensional π-conjugated polymers constitute a promising subclass because the band structure can be manipulated by varying the molecular building blocks while preserving key features such as Dirac cones and high charge mobility. The major barriers to the application of two-dimensional π-conjugated polymers have been the small domain size and high defect density attained in the syntheses explored so far. Here, we demonstrate the fabrication of mesoscale ordered two-dimensional π-conjugated polymer kagome lattices with semiconducting properties, Dirac cone structures and flat bands on Au(111). This material has been obtained by combining a rigid azatriangulene precursor and a hot dosing approach, which favours molecular diffusion and eliminates voids in the network. These results open opportunities for the synthesis of two-dimensional π-conjugated polymer Dirac cone materials and their integration into devices.
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Affiliation(s)
- G Galeotti
- Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, Québec, Canada
- Istituto di Struttura della Materia, CNR, Roma, Italy
- Deutsches Museum, München, Germany
| | - F De Marchi
- Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, Québec, Canada
| | - E Hamzehpoor
- Department of Chemistry, McGill University, Montreal, Québec, Canada
| | - O MacLean
- Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, Québec, Canada
| | - M Rajeswara Rao
- Department of Chemistry, McGill University, Montreal, Québec, Canada
| | - Y Chen
- Department of Chemistry, McGill University, Montreal, Québec, Canada
| | - L V Besteiro
- Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, Québec, Canada
- Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, China
| | - D Dettmann
- Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, Québec, Canada
- Istituto di Struttura della Materia, CNR, Roma, Italy
| | - L Ferrari
- Istituto di Struttura della Materia, CNR, Roma, Italy
| | - F Frezza
- Istituto di Struttura della Materia, CNR, Roma, Italy
- Department of Physics, University of Tor Vergata, Rome, Italy
| | | | - R Liu
- Department of Physics, Lakehead University, Thunder Bay, Ontario, Canada
| | - A K Kundu
- Istituto di Struttura della Materia, CNR, Trieste, Italy
| | - P Moras
- Istituto di Struttura della Materia, CNR, Trieste, Italy
| | - M Ebrahimi
- Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, Québec, Canada
- Department of Chemistry, Lakehead University, Thunder Bay, Ontario, Canada
| | - M C Gallagher
- Department of Physics, Lakehead University, Thunder Bay, Ontario, Canada.
| | - F Rosei
- Centre Energie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, Varennes, Québec, Canada.
| | - D F Perepichka
- Department of Chemistry, McGill University, Montreal, Québec, Canada.
| | - G Contini
- Istituto di Struttura della Materia, CNR, Roma, Italy.
- Department of Physics, University of Tor Vergata, Rome, Italy.
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13
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Kargaran A, Ebrahimi M, Riazi M, Hosseiny A, Jafari GR. Quartic balance theory: Global minimum with imbalanced triangles. Phys Rev E 2020; 102:012310. [PMID: 32794912 DOI: 10.1103/physreve.102.012310] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 07/02/2020] [Indexed: 11/07/2022]
Abstract
Balance theory proposed by Heider for the first time modeled triplet interaction in a signed network, stating that relationships between two people, friendship or enmity, is dependent on a third person. The Hamiltonian of this model has an implicit assumption that all triads are independent, meaning that the type of each triad, being balanced or imbalanced, determined apart from the state of other triads. This independence forces the network to have completely balanced final states. However, there exists evidence indicating that real networks are partially balanced, raising the question of what is the mechanism preventing the system to be perfectly balanced. Our suggestion is to consider a quartic interaction which dissolves the triad's independence. We use the mean-field method to study the thermal behavior of such systems where the temperature is a parameter that allows the stochastic behavior of agents. We show that under a certain temperature, the symmetry between balanced and imbalanced triads will spontaneously break and we have a discrete phase transition. As a consequence, stability arises where either similar balanced or imbalanced triads dominate, hence the system obtains two new imbalanced stable states. In this model, the critical temperature depends on the second power of the number of nodes, which was a linear dependence in thermal balance theory. Our simulations are in good agreement with the results obtained by the mean-field method.
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Affiliation(s)
- A Kargaran
- Department of Physics, Shahid Beheshti University, G.C., Evin, Tehran 19839, Iran
| | - M Ebrahimi
- Department of Physics, Shahid Beheshti University, G.C., Evin, Tehran 19839, Iran
| | - M Riazi
- Department of Physics, Sharif University of Technology, P.O. Box 11365-9161, Tehran, Iran
| | - A Hosseiny
- Department of Physics, Shahid Beheshti University, G.C., Evin, Tehran 19839, Iran
| | - G R Jafari
- Department of Physics, Shahid Beheshti University, G.C., Evin, Tehran 19839, Iran.,Department of Network and Data Science, Central European University, Nador u. 9, H-1051 Budapest, Hungary
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Hosseini SM, Alibakhshi H, Jashni E, Parvizian F, Shen JN, Taheri M, Ebrahimi M, Rafiei N. A novel layer-by-layer heterogeneous cation exchange membrane for heavy metal ions removal from water. J Hazard Mater 2020; 381:120884. [PMID: 31352152 DOI: 10.1016/j.jhazmat.2019.120884] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/14/2019] [Revised: 07/07/2019] [Accepted: 07/09/2019] [Indexed: 06/10/2023]
Abstract
A novel layer-by-layer (LbL) cation exchange membrane was prepared for heavy metal ions removal from water via electrodialysis. LBL membranes fabricated by coating of [chitosan-co-activated carbon nanoparticles] layer on polyvinyl chloride-based heterogeneous cation exchange membrane. Betterment in adherence of layers was achieved through glutaraldehyde cross linking. FTIR, FESEM, 3D-surface images and BET analysis were used for LBL membrane characterization. Membrane surface hydrophilicity, flux, membrane potential, transport number, and their permselectivity were studied. FTIR spectra confirm LbL formation decisively. FESEM images and BET analysis demonstrated that coating of second layer on PVC membrane led to a compact structure. LbL membrane showed smoother and more hydrophilic surface compared to pristine membrane. The transport number and permselectivity increased by deposition of second layer whereas sodium flux showed up-down trend. ED experiment showed good ability in heavy metal ions removal for LBL membrane that follows (Cu2+> Ni2+> Pb2+) sequence. EDX analysis showed a competitive adsorption for heavy metal ions on LBL membrane as (Pb2+> Cu2+≥Ni2+). The effect of ultrasonic waves on regeneration of fouled membranes by heavy metals was investigated. The results showed improved performance for the regenerated membrane. Mechanical resistance also improved by utilizing of ACNs in chitosan layer.
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Affiliation(s)
- S M Hosseini
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran
| | - H Alibakhshi
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran
| | - E Jashni
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran
| | - F Parvizian
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran
| | - J N Shen
- Center for Membrane Separation and Water Science & Technology, Ocean College, Zhejiang University of Technology, Hangzhou 310014, China.
| | - M Taheri
- Department of Mechanical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran
| | - M Ebrahimi
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran
| | - N Rafiei
- Department of Chemical Engineering, Faculty of Engineering, Arak University, Arak 38156-8-8349, Iran
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De Marchi F, Galeotti G, Simenas M, Gallagher MC, Hamzehpoor E, MacLean O, Rao RM, Chen Y, Dettmann D, Contini G, Tornau EE, Ebrahimi M, Perepichka DF, Rosei F. Temperature-induced molecular reorganization on Au(111) driven by oligomeric defects. Nanoscale 2019; 11:19468-19476. [PMID: 31535121 DOI: 10.1039/c9nr06117g] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The formation of ordered molecular structures on surfaces is determined by the balance between molecule-molecule and molecule-substrate interactions. Whether the aggregation process is guided by non-covalent forces or on-surface reactions, a deeper understanding of these interactions is pivotal to formulating a priori predictions of the final structural features and the development of bottom-up fabrication protocols. Theoretical models of molecular systems corroborate the information gathered through experimental observations and help explain the thermodynamic factors that underpin on-surface phase transitions. Here, we report a scanning tunneling microscopy investigation of a tribromo-substituted heterotriangulene on the Au(111) surface, which initially forms an extended close-packed ordered structure stabilized by BrBr halogen bonds when deposited at room temperature. X-ray photoelectron spectroscopy reveals that annealing the self-assembled layer induces a fraction of the molecular precursors to partially dehalogenate that in turn leads to the formation of a less stable BrO non-covalent network which coexists with the short oligomers. Density functional theory (DFT) and Monte Carlo (MC) simulations illustrate how dimer moieties act as defects whose steric hindrance prevents the retention of the more stable configuration. A small number of dimers is sufficient to drive the molecular reorganization into a lower cohesive energy phase. Our study shows the importance of a combined DFT - MC approach to understand the evolution of molecular systems on substrates.
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Affiliation(s)
- F De Marchi
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec, Canada J3X 1S2.
| | - G Galeotti
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec, Canada J3X 1S2. and Istituto di Struttura della Materia, CNR, Via Fosso del Cavaliere 100, 00133 Roma, Italy
| | - M Simenas
- Faculty of Physics, Vilnius University, Saulėtekio 9, LT-10222 Vilnius, Lithuania
| | - M C Gallagher
- Department of Physics, Lakehead University, 955 Oliver Rd, Thunder Bay, Ontario, Canada P7B 5E1.
| | - E Hamzehpoor
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Québec, Canada H3A 0B8.
| | - O MacLean
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec, Canada J3X 1S2.
| | - R M Rao
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Québec, Canada H3A 0B8.
| | - Y Chen
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Québec, Canada H3A 0B8.
| | - D Dettmann
- Istituto di Struttura della Materia, CNR, Via Fosso del Cavaliere 100, 00133 Roma, Italy
| | - G Contini
- Istituto di Struttura della Materia, CNR, Via Fosso del Cavaliere 100, 00133 Roma, Italy and Department of Physics, University of Rome Tor Vergata, Via della Ricerca Scientifica 1, 00133 Roma, Italy
| | - E E Tornau
- Semiconductor Physics Institute, Center for Physical Sciences and Technology, Saulėtekio 3, LT-10222 Vilnius, Lithuania
| | - M Ebrahimi
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec, Canada J3X 1S2.
| | - D F Perepichka
- Department of Chemistry, McGill University, 801 Sherbrooke Street West, Montreal, Québec, Canada H3A 0B8.
| | - F Rosei
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, Québec, Canada J3X 1S2.
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Harrison-Brown M, Scholes C, Ebrahimi M, Field C, Cordingley R, Kerr D, Farah S, Kohan L. Predicting changes in the status of patient-reported outcome measures after Birmingham Hip Resurfacing: an observational cohort study with a median follow-up of ten years. Bone Joint J 2019; 101-B:1431-1437. [PMID: 31674251 DOI: 10.1302/0301-620x.101b11.bjj-2019-0663.r1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
AIMS It is not known whether change in patient-reported outcome measures (PROMs) over time can be predicted by factors present at surgery, or early follow-up. The aim of this study was to identify factors associated with changes in PROM status between two-year evaluation and medium-term follow-up. PATIENTS AND METHODS Patients undergoing Birmingham Hip Resurfacing completed the Veteran's Rand 36 (VR-36), modified Harris Hip Score (mHHS), Tegner Activity Score, and Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) at two years and a minimum of three years. A change in score was assessed against minimal clinically important difference (MCID) and patient-acceptable symptom state (PASS) thresholds. Binary logistic regression was used to assess the relationship between patient factors and deterioration in PASS status between follow-ups. RESULTS Overall, 18% of patients reported reductions in mHHS total score exceeding MCID, and 21% reported similar reductions for WOMAC function scores. Nonetheless, almost all patients remained above PASS thresholds for WOMAC function (98%) and mHHS (93%). Overall, 66% of patients with mHHS scores < PASS at two years reported scores > PASS at latest follow-up. Conversely, 6% of patients deteriorated from > PASS to < PASS between follow-ups. Multivariable modelling indicated body mass index (BMI) > 27 kg/m2, VR-36 Physical Component Score (PCS) < 51, VR-36 Mental Component Score (MCS) > 55, mHHS < 84 at two years, female sex, and bone graft use predicted these deteriorating patients with 79% accuracy and an area under the curve (AUC) of 0.84. CONCLUSION Due to largely acceptable results at a later follow-up, extensive monitoring of multiple PROMs is not recommended for Birmingham Hip Resurfacing patients unless they report borderline or unacceptable hip function at two years, are female, are overweight, or received a bone graft during surgery. Cite this article: Bone Joint J 2019;101-B:1431-1437.
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Affiliation(s)
| | | | | | - C Field
- Joint Orthopaedic Centre, Sydney, Australia
| | | | - D Kerr
- Joint Orthopaedic Centre, Sydney, Australia
| | - S Farah
- Joint Orthopaedic Centre, Sydney, Australia.,AM Orthopaedics, Sydney, Australia
| | - L Kohan
- Joint Orthopaedic Centre, Sydney, Australia
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Sadri M, Hejranfar K, Ebrahimi M. A Numerical Study on Fluid Flow and Acoustic Characteristics of a Supersonic Impinging Jet Using Vorticity Confinement. ACTA ACUST UNITED AC 2019. [DOI: 10.3813/aaa.919391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The objective of this work is to numerically study the fluid flow and acoustic field of a supersonic impinging jet by applying the vorticity confinement (VC) method. For this aim, the three-dimensional compressible Navier-Stokes equations with the incorporation of the VC method are
considered and the resulting system of equations is solved by using the sixth-order compact finite-difference scheme. To eliminate the numerical instability, a low-pass high-order filter is used. The nonreflective boundary conditions are applied for all the free boundaries and the radiated
sound field is obtained by the Kirchhoff surface integration. Comparisons of the present results with the experimental data and other numerical simulations show that the solution methodology adopted based on the application of the VC method with the high-order compact finite-difference scheme
provides a good prediction of the fluid flow and the acoustic field of the impingement region on coarser grids than that usually required in the LESs, and thus, the calculations of coarse grid LESs are improved.
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Saeed OA, Sazili AQ, Akit H, Ebrahimi M, Alimon AR, Samsudin AA. Effects of corn supplementation on meat quality and fatty acid composition of Dorper lambs fed PKC-Urea treated rice straw. BMC Vet Res 2019; 15:233. [PMID: 31286932 PMCID: PMC6615220 DOI: 10.1186/s12917-019-1976-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2018] [Accepted: 06/24/2019] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The increasing costs of feed has subsequently increased the costs of production of livestock, thereby decreasing the profit margin of this sector. The utilization of agro-industrial by-products has to some extent substitute some of the corn grains and soyabean meal, commonly used in animal feeds. In Malaysia, palm kernel cake (PKC) is a by-product of the oil palm industry and is frequently used to supply both crude protein (14-16% CP) and energy (11 MJ/kg) in ruminants. The energy and protein content are adequate for maintenance in the majority of ruminants. However, highly available energy supplementation is known to improve growth performance and protein deposition. This study was carried out to determine the effect on the quality of meat and fatty acid composition of the semitendinosus (ST), supraspinatus (SS), and longissimus lumborum (LL) muscles of Dorper lambs by including corn as an energy source in a basal diet of PKC urea-treated rice straw. RESULTS The results show that the LL muscle-drip loss was greater in animals supplemented with 5% corn compared to the other groups. Higher pH values of SS and LL muscles were observed in animals supplemented with 5 and 10% corn. Furthermore, the L* value of ST muscle was increased in lambs fed on 5% corn while, reduced in those fed on 0% corn, but the a* and b* values were not significantly different in the treatment groups. The fatty acid composition of the SS muscles showed that lambs fed on 10% corn had higher levels of sum PUFA n-3 compared to those fed on 0% corn. The concentration of C18:1trans11 and CLA c12 t10 in ST muscle from the lambs fed on supplemented diets were higher than those of the controls. CONCLUSION This study has concluded the supplementation of corn as a source of energy into a PKC urea-treated rice straw-based diet increased the PUFA concentrations of muscles as compared to control groups.
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Affiliation(s)
- O A Saeed
- Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.,Department of Animal Production Faculty of Agriculture, University Of Anbar, Anbar, Iraq
| | - A Q Sazili
- Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.,Institute of Tropical Agriculture Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - H Akit
- Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - M Ebrahimi
- Department of Veterinary Preclinical Sciences Faculty of Veterinary, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - A R Alimon
- Faculty of Animal Science, Universitas Gadjah Mada, Yogjakarta, Indonesia
| | - A A Samsudin
- Department of Animal Science, Faculty of Agriculture, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia. .,Institute of Tropical Agriculture Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia.
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Galeotti G, De Marchi F, Taerum T, Besteiro LV, El Garah M, Lipton-Duffin J, Ebrahimi M, Perepichka DF, Rosei F. Surface-mediated assembly, polymerization and degradation of thiophene-based monomers. Chem Sci 2019; 10:5167-5175. [PMID: 31183070 PMCID: PMC6526482 DOI: 10.1039/c8sc05267k] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2018] [Accepted: 04/15/2019] [Indexed: 11/21/2022] Open
Abstract
Ullmann coupling of halogenated aromatics is widely used in on-surface synthesis of two-dimensional (2D) polymers and graphene nanoribbons. It stands out among other reactions for regioselectively connecting aromatic monomers into 1D and 2D π-conjugated polymers, whose final structure and properties are determined by the initial building blocks. Thanks to their exceptional electronic properties, thiophene-containing monomers are frequently used for the synthesis of various conjugated materials. On the other hand, their use in on-surface polymerization is hampered by the possibility of ring opening when adsorbed on metal surfaces. In the present work, we mapped the temperature regime for these two competing reactions by investigating the adsorption of a thiophene-based prochiral molecule using scanning tunneling microscopy, X-ray photoelectron spectroscopy and density functional theory calculations. We followed the formation of organometallic (OM) networks, their evolution into covalent structures and the competition between C-C coupling and thiophene ring opening. The effect of surface reactivity was explored by comparing the adsorption on three (111) coinage metal substrates, namely Au, Ag and Cu. While outlining strategies to minimize the ring opening reaction, we found that the surface temperature during deposition is of paramount importance for the preparation of 2D OM networks, greatly enhancing the overall ordering of the product by depositing on hot Ag surface. Notably, the same protocol permits the creation of OM structures on the air-stable Au surface, thereby allowing the synthesis and application of 2D OM networks outside the ultra-high vacuum environment.
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Affiliation(s)
- G Galeotti
- Centre Energie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650 Boulevard Lionel-Boulet , Varennes , Québec , Canada J3X 1S2 . ;
- Istituto di Struttura della Materia , CNR , Via Fosso del Cavaliere 100 , 00133 Roma , Italy
| | - F De Marchi
- Centre Energie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650 Boulevard Lionel-Boulet , Varennes , Québec , Canada J3X 1S2 . ;
| | - T Taerum
- Department of Chemistry , McGill University , 801 Sherbrooke Street West , Montreal , Quebec , Canada H3A 0B8 .
| | - L V Besteiro
- Centre Energie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650 Boulevard Lionel-Boulet , Varennes , Québec , Canada J3X 1S2 . ;
- Institute of Fundamental and Frontier Science , University of Electronic Science and Technology of China , Chengdu 610054 , PR China
| | - M El Garah
- Centre Energie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650 Boulevard Lionel-Boulet , Varennes , Québec , Canada J3X 1S2 . ;
| | - J Lipton-Duffin
- Institute for Future Environments , Queensland University of Technology (QUT) , 2 George Street , Brisbane , 4001 QLD , Australia
| | - M Ebrahimi
- Centre Energie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650 Boulevard Lionel-Boulet , Varennes , Québec , Canada J3X 1S2 . ;
| | - D F Perepichka
- Department of Chemistry , McGill University , 801 Sherbrooke Street West , Montreal , Quebec , Canada H3A 0B8 .
| | - F Rosei
- Centre Energie, Matériaux et Télécommunications , Institut National de la Recherche Scientifique , 1650 Boulevard Lionel-Boulet , Varennes , Québec , Canada J3X 1S2 . ;
- Institute of Fundamental and Frontier Science , University of Electronic Science and Technology of China , Chengdu 610054 , PR China
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De Marchi F, Galeotti G, Simenas M, Ji P, Chi L, Tornau EE, Pezzella A, MacLeod J, Ebrahimi M, Rosei F. Self-assembly of 5,6-dihydroxyindole-2-carboxylic acid: polymorphism of a eumelanin building block on Au(111). Nanoscale 2019; 11:5422-5428. [PMID: 30855042 DOI: 10.1039/c8nr09810g] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Investigating two-dimensional (2D) self-assembled structures of biological monomers governed by intermolecular interactions is a prerequisite to understand the self-assembly of more complex biomolecular systems. 5,6-Dihydroxyindole carboxylic acid (DHICA) is one of the building blocks of eumelanin - an irregular heteropolymer and the most common form of melanin which has potential applications in organic electronics and bioelectronics. By means of scanning tunneling microscopy, density functional theory and Monte Carlo calculations, we investigate DHICA molecular configurations and interactions underlying the multiple 2D patterns formed on Au(111). While DHICA self-assembled molecular networks (SAMNs) are dominated by the hydrogen bonding of carboxylic acid dimers, a variety of 2D architectures are formed due to the multiple weak interactions of the catechol group. The hydroxyl group also allows for redox reactions, caused by oxidation via O2 exposure, resulting in molecular rearrangement. The susceptibility of the molecules to oxidation is affected by their SAMNs architectures, giving insights on the reactivity of indoles as well as highlighting non-covalent assembly as an approach to guide selective oxidation reactions.
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Affiliation(s)
- F De Marchi
- Centre Energie, Materiaux et Telecommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, QC, Canada J3X 1S2.
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Sabow AB, Goh YM, Zulkifli I, Ab Kadir MZ, Kaka U, Adeyemi KD, Abubakar AA, Imlan JC, Ebrahimi M, Sazili AQ. Electroencephalographic and blood parameters changes in anaesthetised goats subjected to slaughter without stunning and slaughter following different electrical stunning methods. Anim Prod Sci 2019. [DOI: 10.1071/an17486] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Electrical stunning is the most widely used stunning method for sheep and goats. Because low frequency head-to-back electrical stunning induces cardiac arrest, it is non-compliant with halal requirements. In addition, conventional head-only electrical stunning method can have adverse effects on carcass and meat quality. To address these issues high-frequency electrical stunning systems were developed. High frequency head-to-back removes the potential for pain and distress compared with non-stunned slaughter and does not induce cardiac arrest like low frequency head-to-back stunning making it appropriate for halal. However, this claim is yet to be proven through a comprehensive neurophysiological study. Thus, the present study examined the effects of different pre-slaughter electrical stunning methods and slaughter without stunning on electroencephalographic and blood biochemistry changes. Thirty-two male Boer crossbred bucks were distributed into four groups of eight animals each and subjected to slaughter without stunning (SWS), low frequency head-only (LFHO) and low frequency head-to-back (LFHB) or high frequency head-to-back electrical stunning (HFHB). Slaughtering of animals with or without stunning was performed under minimal anaesthesia. Based on electroencephalograph results, at slaughter, the SWS animals showed an increase in brain electrical activity, which is consistent with the presence of post slaughter noxious sensory input associated with tissue damage. Meanwhile the electroencephalograph activities decreased immediately after application of electrical stunning in all animals, suggesting that they were insensible to pain during and after the neck cut. Electrical brain activities for goats subjected to HFHB were comparable to those for LFHO and those for LFHB. The percentage of animals that exhibited severe clonic activity was significantly lower after LFHB or HFHB stunning compared with LFHO. The concentrations of catecholamines and hyperglycemia in electrically stunned goats were higher compared with those from SWS. It was observed that LFHB caused cardiac arrest in all goats whereas all HFHB goats had no cardiac arrest. High frequency head-to-back electrical stunning may be an improvement on non-stunned slaughter and has advantages for meat quality. However, stunning effectiveness after head-to-back electrical stunning with high frequencies needs to be evaluated under industrial conditions before any recommendation is given.
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Scholes CJ, Ebrahimi M, Farah SB, Field C, Cordingley R, Kerr D, Kohan L. The outcome and survival of metal-on-metal hip resurfacing in patients aged less than 50 years. Bone Joint J 2019; 101-B:113-120. [DOI: 10.1302/0301-620x.101b1.bjj-2018-0702.r1] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Aims The aim of this study was to report the implant survival and patient-reported outcome measures (PROMs) in a consecutive series of patients aged less than 50 years at the time of arthroplasty using the Birmingham Hip Resurfacing system (BHR), with a minimum follow-up of ten years. Patients and Methods A total of 226 patients with osteoarthritis of the hip, who underwent BHR and presented to a single surgeon, were included in the study. Survival of the implant was confirmed by cross-checking with the Australian Orthopaedic Association National Joint Replacement Registry. Kaplan–Meier survival curves with 95% confidence intervals (CIs) were constructed. Pre- and postoperative PROMs were compared with t-tests, and postoperative scores were compared using anchor analysis with age and gender matched normative data. Results At median follow-up of 12 years (interquartile range (IQR) 10 to 13), six BHRs were revised, with a cumulative rate of survival of 96.8% (95% confidence interval (CI) 94.2 to 99.4) at 15 years, and with a significantly lower (p = 0.019) cumulative rate of revision than the national average for the same device at ten years. Most revisions (n = 4) were undertaken early, less than three years postoperatively, and occurred in women. Patient-reported general health (Veteran’s Rand-36), disease state (Western Ontario and McMaster Universities Osteoarthritis Index), function (modified Harris Hip Score) and level of activity (Tegner activity score) maintained significant (p < 0.01 for each) improvements beyond ten years postoperatively and were equal to, or exceeded, age- and gender-matched normative data in more than 80% of the patients. Conclusion Longer term PROMs after BHR, from a single surgeon, for patients aged less than 50 years remain under-reported. We found that the outcome after a BHR, at a minimum of ten years postoperatively, remained satisfactory, particularly for self-reported hip function.
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Affiliation(s)
| | | | | | - C. Field
- Joint Orthopaedic Centre, Sydney, Australia
| | | | - D. Kerr
- Joint Orthopaedic Centre, Sydney, Australia
| | - L. Kohan
- Joint Orthopaedic Centre, Sydney, Australia
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Sadeghi A, Ebrahimi M, Sadeghi B, Mortazavi SA. Evaluation of safety and antifungal activity of Lactobacillus reuteri and Pediococcus diacetilactis isolates against aflatoxigenic Aspergillus flavus. BJVM 2019. [DOI: 10.15547/bjvm.2046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Biocontrol of moulds by lactic acid bacteria (LAB) instead of antibiotics and chemical preservatives is a new approach in veterinary medicine. The aims of present research were to perform molecular identification of dominant sourdough LAB isolates and to evaluate their in vivo safety and in vitro antifungal properties for using as biopreservative agents. Sequencing results of PCR products led to identification of Lactobacillus reuteri and Pediococcus diacetilactis as LAB isolates. Antifungal activity of the isolates and their cell-free culture filtrate (CCF) were also confirmed against aflatoxigenic Aspergillus flavus, respectively by overlay and spore spot methods. Accordingly, antagonistic effect of P. diacetilactis and its CCF were significantly (P<0.05) higher than L. reuteri and CCF of mentioned LAB isolate. Clinical chemistry and haematological findings in mice fed LAB demonstrated also insignificant difference vs control mice and were in the normal range, which confirmed the safety of LAB isolates. By considering the importance of safe, food grade biocontrol agents, L. reuteri and P. diacetilactis isolates and their CCF may be considered as an alternative for antibiotics and other chemical preservatives in food and feed processing chain
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Ebrahimi M, Fathi R, Pirsaraei ZA, Talebi-Garakani E, Najafi M. Expression of the key metabolic regulators in the white adipose tissue of rats; the role of high-fat diet and aerobic training. Comparative Exercise Physiology 2018. [DOI: 10.3920/cep180008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Lipid metabolism, especially in the white adipose tissue as an active metabolic organ, is tightly regulated by the key transcription factors, such as the sterol regulatory element binding protein 1c (SREBP-1c) and the Farnesoid X Receptor (FXR). We have studied the expression of these genes in the white adipose tissue to see how a high fat diet (HFD) and two intensities of aerobic training change the lipogenic and lipolytic pathways. 44 male Wistar rats randomly divided into the normal (12% calories from fat) and HFD (56% calories from fat) groups. Each group included control (n=6), moderate trained (n=8, ~65% Vo2max) and high intensity trained (n=8, ~75% Vo2max) rats. After 8 weeks of training, the weight changes, plasma insulin and lipid profile levels and the relative gene expression of SREBP-1c and FXR in the adipose tissue was measured. Data were analysed by 2-way ANOVA (P<0.05). HFD fed rats showed higher levels of insulin and dyslipidemia that was correlated with the higher weight gain. Also, the adipose expression of SREBP-1c was higher in the HFD fed rats that it was strongly correlated with the lower FXR expression. Trained rats independent of the intensity of the training showed lower SREBP-1c and higher FXR expression, but no change was observed in the lipid profile levels. HFD-induced dyslipidemia could occur via SREBP-1c activation in the adipose tissue while the aerobic training activates FXR and inhibits the lipogenic pathways. Despite the activation of lipolytic pathways in the trained rats, it seems that diet has more effect on the lipid profile than the aerobic training.
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Affiliation(s)
- M. Ebrahimi
- Department of Exercise Biochemistry and Metabolism, University of Mazandaran, Babolsar, 1453754769, Iran
| | - R. Fathi
- Department of Exercise Biochemistry and Metabolism, University of Mazandaran, Babolsar, 1453754769, Iran
| | - Z. Ansari Pirsaraei
- Department of Animal Science and Fishery, Sari Agricultural Sciences and Natural Resources University, Sari, 1453754769, Iran
| | - E. Talebi-Garakani
- Department of Exercise Biochemistry and Metabolism, University of Mazandaran, Babolsar, 1453754769, Iran
| | - M. Najafi
- Department of Animal Science and Fishery, Sari Agricultural Sciences and Natural Resources University, Sari, 1453754769, Iran
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25
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Ebrahimi M, Hamidinejat H, Tanabandeh MR, Razi Jalali MH, Rasouli A. Cloning and Expression of Immunogenic Regions of EMA-1 Gene of Theileria equi From Infected Horses. Arch Razi Inst 2018; 73:295-303. [PMID: 31077119 DOI: 10.22092/ari.2017.110581.1132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/10/2019] [Accepted: 07/10/2017] [Indexed: 09/30/2022]
Abstract
Diversity among the pathogenic strains of Theileria equi (T. equi), a major agent of equine piroplasmosis, can affect the appropriate detection of parasite and host immunization. Production of recombinant surface proteins from an infected horse in natural endemic area provides a reliable tool for immunodiagnosis of parasite. Regarding this, the present study was targeted toward the cloning, expression, and purification of the immunogenic regions of equine merozoite antigen 1 (EMA-1 gene), as one of the most important immunodominant surface proteins in T. equi, from naturally infected horses in Iran. The immunogenic region of EMA-1 gene was amplified using the blood of infected horses. EMA-1 gene was cloned into pET26b vector. Then, recombinant plasmids (pET 26b-EMA-1) were transformed into competent E. coli BL21 (DE3) cells. Cloning was confirmed by polymerase chain reaction (PCR), restriction enzyme assays, and DNA sequence analysis. The recombinant protein was expressed using isopropyl &beta;-D-1-thiogalactopyranoside as an inducer, purified using nickle-nitrilotriacetic acid column, and then confirmed by 10% sodium dodecyl sulfate polyacrylamide gel electrophoresis (SDS-PAGE) and dot blot analysis utilizing Anti-His Tag antibody. Furthermore, the immunoreactivity of recombinant protein against the serum of the infected horses was evaluated using dot blot analysis. The PCR product analysis showed a 750-bp band belonging to immunogenic regions of EMA-1 gene. Sequence analysis revealed that cloned EMA-1 and protein had 94% and 97% homology to EMA-1 sequences submitted to GenBank from different countries, respectively. Restriction enzyme and sequence analyses confirmed the subcloning and correction of the orientation of inserted gene. The SDS-PAGE analysis confirmed the expression of EMA-1 protein with a 28-kDa band. The results of the dot blot analysis revealed that the horse serum containing antibody against T. equi could react with the purified recombinant protein. Purified EMA-1 protein can be used as a reliable tool for the future development of diagnostic tests or vaccines.
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Affiliation(s)
- M Ebrahimi
- Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - H Hamidinejat
- Department of Parasitology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - M R Tanabandeh
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz.,Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - M H Razi Jalali
- Department of Pathobiology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - A Rasouli
- Department of Clinical Sciences, Faculty of Veterinary Medicine, Shiraz University, Shiraz, Iran
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26
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Mostofi Sarkari N, Mohseni M, Ebrahimi M. Investigating the crosslinking effects on surface characteristics of vinyltrimethoxysilane-grafted moisture-cured low-density polyethylene/ethylene vinyl acetate blend. J Appl Polym Sci 2018. [DOI: 10.1002/app.47147] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- N. Mostofi Sarkari
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology; P.O. Box 15875-4413, Tehran Iran
| | - M. Mohseni
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology; P.O. Box 15875-4413, Tehran Iran
| | - M. Ebrahimi
- Department of Polymer Engineering and Color Technology; Amirkabir University of Technology; P.O. Box 15875-4413, Tehran Iran
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27
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Soltani Z, Keshavarzi D, Ebrahimi M, Soltani A, Moemenbellah-Fard MJ, Soltani F, Faramarzi H, Amraee K, Elyasigomari A. The Fauna and Active Season of Mosquitoes in West of Fars Province, Southwest of Iran. Arch Razi Inst 2018; 72:203-208. [PMID: 30341942 DOI: 10.22092/ari.2017.111603] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 08/06/2016] [Indexed: 09/30/2022]
Abstract
Culicidae are highly important for public health as they can be vectors of diseases and are responsible for a wide spectrum of infections. Five collection sites were selected randomly with regards to existing facilities in Firouzabad County. For collecting larvae and total catch for adult mosquitoes, sampling was carried out by dipping technique for collecting larvae and total catch for adult mosquitoes. A total of 689 adults and 1313 larvae of Culicidae were collected, of which 3 genera and 6 species of Culicidae were recognized, namely, Anopheles superpictus, Anopheles d&rsquo;thali, Culex sinaiticus, Culex theileri, Culex mimeticus, and Culiseta longiareolata. Cx. theileri was the most frequent Culicidae collected at Firouzabad, with a total of 613 and 247 larval and adult specimens, respectively. The highest number of mosquitoes was collected in June (31.1%) and the lowest in May (3.4%). The mean temperatures in June and May were 31.3˚C and 28.2˚C, respectively. We found some vectors that are of medical and veterinary importance; our results could be applied in vector control programs that aim at eradication or control of mosquitoes in this area.
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Affiliation(s)
- Z Soltani
- Communicable Disease Unit, Faculty of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - D Keshavarzi
- Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.,Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - M Ebrahimi
- Communicable Disease Unit, Faculty of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - A Soltani
- Research Center for Health Sciences, Institute of Health, Department of Medical Entomology and Vector Control, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - M J Moemenbellah-Fard
- Research Center for Health Sciences, Institute of Health, Department of Medical Entomology and Vector Control, School of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - F Soltani
- Communicable Disease Unit, Faculty of Health, Shiraz University of Medical Sciences, Shiraz, Iran
| | - H Faramarzi
- Department of Community Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - K Amraee
- Department of Medical Entomology and Vector Control, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - A Elyasigomari
- Department of Medical Entomology and Vector Control, School of Public Health, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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28
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Salehi H, Momeni M, Ebrahimi M, Fatemi M, Rahbar H, Ranjpoor F, Salehi A, Moosavizadeh F. Comparing the effect of colactive plus ag dressing versus nitrofurazone and vaseline gauze dressing in the treatment of second-degree burns. Ann Burns Fire Disasters 2018; 31:204-208. [PMID: 30863254 PMCID: PMC6367865] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 10/11/2018] [Indexed: 06/09/2023]
Abstract
Wound care quality and speed of burn healing are important factors that affect the treatment, prognosis and complications of burns. Burn care is challenging, and the ideal method controversial. The aim of this study was to compare the effects of a new dressing (ColActive dressing) in the treatment of superficial second-degree burns versus traditional dressing including Vaseline and Nitrofurazone. This was a randomized clinical trial study involving 25 cases. A superficial second-degree burn area was divided into two parts in each patient; randomly, traditional dressing was used on one area, and ColActive plus Ag dressing on the other. Every 3 days, after removing the dressings and washing the wounds, wound surface area was evaluated by medical photographic records and J image software. Wound surface area in the two groups was compared before dressing and on the 3rd, 6th, 9th and 12th day afterwards. The difference was not significant before dressing, but significant on the 3rd, 6th, 9th and 12th post-operative day. The difference was significant in both groups, but it was more prominent in the ColActive group (p<0.001) than in the traditional group (p<0.05). Considering the results of this study and good results in previous case reports, ColActive may be more effective than traditional dressing. We suggest a more comprehensive study for a longer period with a larger number of cases to compare other important variables such as scar quality, cost, and pain in the two dressings.
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Affiliation(s)
| | - M. Momeni
- Mahnoush Momeni, Assistant Professor of General Surgery
Motahari Hospital, Burn Research CentreYasami Ave, Vali Asr St, TehranIran+98 2188770031+98 2188770048
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29
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Adinehbeigi K, Ebrahimi M, Soltani Eini M, Sameie A. Prevalence of Haemoproteus columbae (Apicomplexa: Haemoproteidae) and Trichomonas gallinae (Metamonada: Trichomonadidae) Infections Among Pigeons (Columba livia) in West Azerbaijan Province, Iran. Arch Razi Inst 2018; 73:147-152. [PMID: 30242806 DOI: 10.22092/ari.2018.116619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/25/2017] [Accepted: 05/10/2017] [Indexed: 09/30/2022]
Abstract
A cross-sectional survey was performed on domestic pigeons (Columba liviadomestica) to evaluate the prevalence of Haemoproteus columbae and Trichomonas gallinae in West Azerbaijan Province, northwest of Iran between July 2015 and September 2016. Five hundred and sixty oropharyngeal swab smears were examined, 297 (53%) of which were identified to be positive for T. gallinae. Also, the results obtained from blood smears examination indicated that 115 (20.5%) cases were found to be infected with H. columbae. The rates of T. gallinae and H. columbae infection infemale pigeons (58.3% and 21.3%, respectively) were higher compared to those in males. There were 76 (26.1%) and 210 (72.4%) cases of H. columbae and T. gallinae infection in adolescent birds, respectively, which were higher than those in other age groups. We found high prevalence rates of H. columbae and T. gallinae infections in domestic pigeons. Therefore, more attention should be focused on controlling the spread of T. gallinae and H. columbae infection in domestic pigeons.
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Affiliation(s)
- K Adinehbeigi
- Department of Pathobiology, School of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - M Ebrahimi
- Department of Pathobiology, School of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran.,Department of Pathobiology, School of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - M Soltani Eini
- Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
| | - A Sameie
- Department of Pathobiology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran
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30
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De Marchi F, Galeotti G, Simenas M, Tornau EE, Pezzella A, MacLeod J, Ebrahimi M, Rosei F. Room-temperature surface-assisted reactivity of a melanin precursor: silver metal-organic coordination versus covalent dimerization on gold. Nanoscale 2018; 10:16721-16729. [PMID: 30156253 DOI: 10.1039/c8nr04002h] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The ability of catecholamines to undergo oxidative self-polymerization provides an attractive route for preparation of coatings for biotechnology and biomedicine applications. However, efforts toward developing a complete understanding of the mechanism that underpins polymerization have been hindered by the multiple catechol crosslinking reaction pathways that occur during the reaction. Scanning tunneling microscopy allows the investigation of small molecules in a reduced-complexity environment, providing important insight into how the intermolecular forces drive the formation of supramolecular assemblies in a controlled setting. Capitalizing on this approach, we studied the self-assembly of 5,6-dihydroxy-indole (DHI) on Au(111) and Ag(111) to investigate the interactions that affect the two-dimensional growth mechanism and to elucidate the behavior of the catechol group on these two surfaces. X-ray photoelectron spectroscopy, together with density functional theory and Monte Carlo modeling, helps unravel the differences between the two systems. The molecules form large ordered domains, yet with completely different architectures. Our data reveal that some of the DHI molecules deposited on Ag are in a modified redox state, with their catechol group oxidized into quinone. On Ag(111), the molecules are deposited in long-range lamellar patterns stabilized by metal-organic coordination, while covalent dimer pairs are observed on Au(111). We also show that the oxidation susceptibility is affected by the substrate, with the DHI/Au remaining inert even after being exposed to O2 gas.
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Affiliation(s)
- F De Marchi
- Centre Energie, Materiaux et Telecommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, QC, Canada J3X 1S2.
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31
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Danielsson K, Nylander E, Sjöström M, Ebrahimi M. Epstein-Barr virus is not detected in mucosal lichen planus. Med Oral Patol Oral Cir Bucal 2018; 23:e560-e563. [PMID: 30148472 PMCID: PMC6167091 DOI: 10.4317/medoral.22617] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Accepted: 06/12/2018] [Indexed: 12/23/2022] Open
Abstract
Background Lichen planus (LP) is a chronic inflammatory, immunological, mucocutaneous disease can affect skin, genital and oral mucosa. Oral lichen planus (OLP) is the most common noninfectious, chronic inflammatory oral disease affecting 1-2% of the general adult population. World Health Organization (WHO) classifies OLP as a potentially malignant disorder. Epstein Barr virus or human herpesvirus-4, is a member of the herpes virus family and one of the most ubiquitous viruses known to human, infecting approximately 90% of the world’s adult population. The virus often infects B lymphocytes resulting in a wide spectrum of mucocutaneous and systemic diseases, ranging from mild lesions to aggressive malignancies. The aim of this study was to investigate expression of the EBV encoded RNAs EBER1 and EBER2 in oral and genital lichen planus and compare results with normal tissues in situ hybridization which is considered the golden standard for detection of EBER. Material and Methods A total of 68 biopsies, 25 oral LP, 26 genital LP, 10 oral controls and finally 7 genital controls were analysed using situ hybridization. Results All samples had RNA as shown by the control slide, whereas no case contained neither EBER1 nor EBER2. Conclusions Based on results from our study EBV is not involved in aetiology of lichen planus. Key words:Mucosal lichen planus, Epstein - Barr virus.
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Affiliation(s)
- K Danielsson
- Department of Odontology, Umeå University, SE - 901 85 Umeå, Sweden,
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32
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Sadri M, Hejranfar K, Ebrahimi M. Prediction of fluid flow and acoustic field of a supersonic jet using vorticity confinement. J Acoust Soc Am 2018; 144:1521. [PMID: 30424640 DOI: 10.1121/1.5055215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 08/31/2018] [Indexed: 06/09/2023]
Abstract
In this study, the numerical simulation of the fluid flow and acoustic field of a supersonic jet is performed by using high-order discretization and the vorticity confinement (VC) method on coarse grids. The three-dimensional Navier-Stokes equations are considered in the generalized curvilinear coordinate system and the high-order compact finite-difference scheme is applied for the space discretization, and the time integration is performed by the fourth-order Runge-Kutta scheme. A low-pass high-order filter is applied to stabilize the numerical solution. The non-reflecting boundary conditions are adopted for all the free boundaries, and the Kirchhoff surface integration is utilized to obtain the far-field sound pressure levels in a number of observer locations. Comparisons of the jet mean flow and jet aeroacoustics results with the other numerical and experimental data at similar flow conditions are made and show a reasonable agreement. The study shows that the proposed solution methodology based on the high-order compact finite-difference scheme in conjunction with the VC method can reasonably predict the near-field flow and the far-field noise of high Reynolds number jets with a fairly coarser grid than that used in the large eddy simulations and, thus, the computational cost can be significantly decreased.
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Affiliation(s)
- M Sadri
- Sharif University of Technology and Aerospace Research Institute, Tehran, Iran
| | - K Hejranfar
- Aerospace Engineering Department, Sharif University of Technology, Tehran, Iran
| | - M Ebrahimi
- Aerospace Research Institute, Tehran, Iran
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33
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Rahimi M, Ebrahimi M, Alizadeh E. Comparison of expression of microRNAs which regulate metastasis genes in breast cancer stem cells and primary breast cancer tissues. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy318.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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34
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Ahmed MA, Jusoh S, Alimon AR, Ebrahimi M, Samsudin AA. Nutritive and Anti-Nutritive Evaluation of Kleinhovia hospita, Leucaena leucocephala and Gliricidia sepium with Respect to Their Effects on in Vitro Rumen Fermentation and Gas Production. Trop Anim Sci J 2018. [DOI: 10.5398/tasj.2018.41.2.128] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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35
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Danielsson K, Olah J, Zohori-Zangeneh R, Nylander E, Ebrahimi M. Increased expression of p16 in both oral and genital lichen planus. Med Oral Patol Oral Cir Bucal 2018; 23:e449-e453. [PMID: 29924765 PMCID: PMC6051687 DOI: 10.4317/medoral.22432] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Accepted: 05/22/2018] [Indexed: 12/29/2022] Open
Abstract
Background Lichen Planus, LP, is an inflammatory disease of possible autoimmune origin affecting mainly oral and genital mucosa and skin. According to the WHO oral LP is considered a potentially malignant disorders. The p16 tumour suppressor protein can act as an inhibitor of cyclin dependent kinases 4 and 6 and thus down regulate cell cycle progression. Since the discovery of p16 several studies have evaluated its expression in various forms of human cancers. The aim of this study was to evaluate and compare the expression of p16 in oral and genital LP and corresponding healthy mucosa. Material and Methods A total of 76 cases of oral LP (OLP), 34 cases of genital LP (GLP), 12 cases of healthy oral and 9 cases of healthy genital mucosa were analysed by the use of immunohistochemistry. Results Data showed p16 to be highly expressed in both oral and genital LP, higher than in oral (p=0.000), and genital controls (p=0.002). Conclusions Results suggest that the over-expression of p16 seen in LP play a part in the histopathology of the disease. Key words:p16, inflammation, oral, genital, lichen planus, malignant risk.
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Affiliation(s)
- K Danielsson
- Department of Odontology, Umeå University, SE - 901 85 Umeå, Sweden,
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36
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Pirsaraei ZA, Rahimi A, Deldar H, Sayyadi AJ, Ebrahimi M, Shahneh AZ, Shivazad M, Tebianian M. Effect of Feedingarginine on the Growth Performance, Carcass Traits, Relative Expression of Lipogenic Genes, and Blood Parametersof Arian Broilers. Braz J Poult Sci 2018. [DOI: 10.1590/1806-9061-2017-0620] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- ZA Pirsaraei
- Sari Agricultural Sciences & Natural Resources University, Iran
| | - A Rahimi
- Sari Agricultural Sciences & Natural Resources University, Iran
| | - H Deldar
- Sari Agricultural Sciences & Natural Resources University, Iran
| | - AJ Sayyadi
- Sari Agricultural Sciences & Natural Resources University, Iran
| | | | | | | | - M Tebianian
- Razi Vaccine and Serum Research Institute, Iran
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37
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Nematollahi MJ, Clark MJR, Ebrahimi P, Ebrahimi M. Preliminary assessment of groundwater hydrogeochemistry within Gilan, a northern province of Iran. Environ Monit Assess 2018; 190:242. [PMID: 29572684 DOI: 10.1007/s10661-018-6543-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Accepted: 02/12/2018] [Indexed: 05/28/2023]
Abstract
In four basins of Gilan province, groundwater samples were collected from 127 piezometric wells to investigate the hydrogeochemistry of groundwater, and additionally its suitability for drinking and irrigation purposes. The average concentrations of major cations and anions follow the order of Ca2+ > Na+ > Mg2+ > K+ and [Formula: see text], respectively. Using Piper diagram delineation, CaMgHCO3 was determined as the main hydrogeochemical facies of groundwater. According to Piper diagrams, Gibbs plots, and ionic ratios, silicate weathering and ion exchange are the major processes regulating the groundwater hydrochemistry. Furthermore, saturation indices (SIs) revealed that carbonate precipitation also plays an important role in aquifers. Among the processes, weathering of silicate minerals seems to be the dominant process. Comparing the analyzed major ions and physicochemical parameters with the WHO guideline values indicates that the potability of most groundwater samples is generally acceptable. Electrical conductivity (EC) and total dissolved solid (TDS) measurements along with sodium percentage (SP), sodium adsorption ratio (SAR), Kelley's index (KI), and residual sodium carbonate (RSC) calculations suggest that groundwater in many areas is suitable for irrigation use. Nonetheless, total hardness (TH) values ranging as high as 650.0 mg/l reveal many groundwater samples to be classified as hard and very hard, indicating a requirement for long-term monitoring and further evaluation. The present study shows that the groundwater quality in Lahijan, Astaneh, and to a lesser extent Fouman drainage basins is lower than in Talesh. Therefore, intense monitoring programs towards enhanced water management practices are recommended before poorer quality groundwater is further utilized.
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Affiliation(s)
- M J Nematollahi
- Department of Earth Sciences, College of Sciences, Shiraz University, Shiraz, Iran.
| | - M J R Clark
- Commonwealth Scientific Ltd., Victoria, Canada
| | - P Ebrahimi
- Department of Earth Sciences, College of Sciences, Shiraz University, Shiraz, Iran
| | - M Ebrahimi
- Department of Geology, Faculty of Sciences, University of Zanjan, Zanjan, Iran
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Ebrahimi M, Fathi R, Pirsaraei ZA, Garakani ET, Najafi M. How high-fat diet and high-intensity interval training affect lipid metabolism in the liver and visceral adipose tissue of rats. Comparative Exercise Physiology 2018. [DOI: 10.3920/cep170018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Lipogenic and lipolytic pathways are tightly regulated by nuclear receptors and binding proteins, such as farnesoid x receptor (FXR) and sterol regulatory element binding protein 1c (SREBP-1c). We designed this research to study the effects of high-intensity interval training (HIIT) and high-fat diet (HFD) on hepatic and adipose FXR and SREBP-1c gene expression beside the plasma levels of lipid profile and insulin. 24 male Wistar rats were randomly divided into normal (~12% fat) and HFD (~56% fat) groups with or without participating in the 8 weeks HIIT protocol. Results from two-way ANOVA and Pearson tests (P<0.05) showed that the HFD rats experienced a larger weight gain correlated with dyslipidemia and hyperinsulinemia, higher hepatic and adipose SREBP-1c expression and lower hepatic FXR expression compared with normal diet fed rats. Although HIIT rats showed higher hepatic FXR and lower hepatic and adipose SREBP-1c expression and lower weight gain compared with untrained rats, plasma lipid profile levels had not any significant difference between trained and untrained rats. Interestingly, hepatic FXR expression was negatively correlated with weight gain and SREBP-1c expression in both tissues while only the hepatic SREBP-1c was positively correlated to insulin levels. In conclusion, HFD-induced dyslipidemia could occur via the activation of the hepatic SREBP-1c pathway under the insulin effect. Although HIIT rats showed lower SREBP-1c correlated to hepatic FXR activation it seems diet is more effective on lipid profile than HIIT. Also, in presence of HFD, HIIT only affects adipose lipolysis.
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Affiliation(s)
- M. Ebrahimi
- Department of Exercise Biochemistry and Metabolism, University of Mazandaran, Shahid Beheshti Ave, Babolsar 47416-13534, Iran
| | - R. Fathi
- Department of Exercise Biochemistry and Metabolism, University of Mazandaran, Shahid Beheshti Ave, Babolsar 47416-13534, Iran
| | - Z. Ansari Pirsaraei
- Department of animal science and fishery, Sari Agricultural Sciences and Natural Resources University, Farah Abad, Sari 4818168984, Iran
| | - E. Talebi Garakani
- Department of Exercise Biochemistry and Metabolism, University of Mazandaran, Shahid Beheshti Ave, Babolsar 47416-13534, Iran
| | - M. Najafi
- Department of animal science and fishery, Sari Agricultural Sciences and Natural Resources University, Farah Abad, Sari 4818168984, Iran
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Khoramdelan F, Davoodnia A, Bozorgmehr MR, Ebrahimi M. Synthesis of New Functionalized 1,4-Dihydroquinolines and Pyrimido[4,5-b]quinolines. RUSS J GEN CHEM+ 2018. [DOI: 10.1134/s1070363217120386] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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40
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Aiman-Zakaria A, Yong-Meng G, Ali-Rajion M, Jafari S, Faseleh-Jahromi M, Shokriyazdan P, Ebrahimi M. The influence of plant polyphenols from oil palm ( Elaeis guineensis Jacq.) leaf extract on fermentation characteristics, biohydrogenation of C18 PUFA, and microbial populations in rumen of goats: in vitro study. ACTA AGR SCAND A-AN 2018. [DOI: 10.1080/09064702.2017.1418017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- A. Aiman-Zakaria
- Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - G. Yong-Meng
- Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Institute of Tropical Agriculture, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - M. Ali-Rajion
- Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
| | - S. Jafari
- Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Department of Poultry Science, Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran
| | - M. Faseleh-Jahromi
- Institute of Tropical Agriculture, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Agriculture Biotechnology Research Institute of Iran (ABRII), East and North-East Branch, Mashhad, Iran
| | - P. Shokriyazdan
- Institute of Tropical Agriculture, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Agriculture Biotechnology Research Institute of Iran (ABRII), East and North-East Branch, Mashhad, Iran
| | - M. Ebrahimi
- Department of Veterinary Preclinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, Serdang, Selangor, Malaysia
- Department of Plant Sciences & Biotechnology, Faculty of Life Sciences & Biotechnology, Shahid Beheshti University, Tehran, Iran
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Czermak P, Ebrahimi M, Catapano G. New Generation Ceramic Membranes have the Potential of Removing Endotoxins from Dialysis Water and Dialysate. Int J Artif Organs 2018; 28:694-700. [PMID: 16049903 DOI: 10.1177/039139880502800708] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Poor water properties, use of concentrated bicarbonate, and biofilm growth in pipes and storage tanks often cause dialysis water and dialysate contamination with bacteria and endotoxins. High-flux dialysis with bicarbonate may favor endotoxin transfer from the dialysate into the blood exposing patients to serious short - and long-term side effects. Ultrafiltration across hydrophobic synthetic membranes effectively removes endotoxins from dialysis water by combined filtration and adsorption. However, repeated sterilization worsens the membrane separation properties, and limits their use. Ceramic membranes are generally more resistant to harsh operating conditions than polymeric membranes, and may represent an alternative for endotoxin removal. Previously, we proved that the ceramic membranes commercially available at that time were not retentive enough to ensure production of endotoxin-free dialysis water. In this paper, we investigated the endotoxin removal capacity of new generation commercial ceramic membranes with nominal molecular weight cut-off down to 1,000. In dead-end filtration, all investigated membranes produced water meeting, the European standards, or close to, when challenged with low endotoxin concentrations, but only one membrane type succeeded at high endotoxin concentrations. In cross-flow filtration, none produced water meeting the European standard. Moreover, sterilization and rinsing procedures altered the separation properties of two out of three membrane types.
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Affiliation(s)
- P Czermak
- Institute of Biopharmaceutical Technology, University of Applied Sciences Giessen-Friedberg, Giessen, Germany.
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Ebrahimi M, Rezalotfi A, Hajimoradi M, Hassan Z. STAT3 inhibition reduces self-renewal in gastric cancer and promotes immune activation. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx711.057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Rezalotfi A, Ebrahimi M, Solgi G. Gastric cancer stem-like cells, the balance operator of Th17 and Treg. Ann Oncol 2017. [DOI: 10.1093/annonc/mdx711.073] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ebrahimi M, Kerker S, Schmitz O, Schmidt AA, Czermak P. Evaluation of the fouling potential of ceramic membrane configurations designed for the treatment of oilfield produced water. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1386217] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- M. Ebrahimi
- Institute of Bioprocess Engineering and Membrane Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
- Department of Life Science Engineering, ehc-memtec UG, Giessen, Germany
| | - S. Kerker
- Institute of Bioprocess Engineering and Membrane Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
| | - O. Schmitz
- Institute of Bioprocess Engineering and Membrane Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
| | - A. A. Schmidt
- Department of Life Science Engineering, DECKMA HAMBURG GmbH, Hamburg, Germany
| | - P. Czermak
- Institute of Bioprocess Engineering and Membrane Technology, University of Applied Sciences Mittelhessen, Giessen, Germany
- Department of Chemical Engineering, Kansas State University, Manhattan, KS, USA
- Faculty of Biology and Chemistry, Justus‐Liebig University of Giessen, Giessen, Germany
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Tajfirooz F, Davoodnia A, Pordel M, Ebrahimi M, Beyramabadi SA. Synthesis of some new heterocycles containing quinazoline moiety. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s1070363217100255] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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Tarig AA, Wahid H, Rosnina Y, Yimer N, Goh YM, Baiee FH, Khumran AM, Salman H, Assi MA, Ebrahimi M. Effect of different concentrations of soybean lecithin and virgin coconut oil in Tris-based extender on the quality of chilled and frozen-thawed bull semen. Vet World 2017; 10:672-678. [PMID: 28717321 PMCID: PMC5499086 DOI: 10.14202/vetworld.2017.672-678] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 05/05/2017] [Indexed: 11/16/2022] Open
Abstract
AIM The objective of this study was to evaluate the effects of different concentrations of soybean lecithin (SL) and virgin coconut oil (VCO) in Tris-based extender on chilled and frozen-thawed bull semen quality parameters. MATERIALS AND METHODS A total of 24 ejaculates were collected from four bulls via an electroejaculator. Semen samples were diluted with 2% VCO in Tris-based extender which consists of various concentrations of SL (1, 1.25, 1.5, and 1.75%). A 20% egg yolk in Tris used as a positive control (C+). The diluted semen samples were divided into two fractions; one for chilling which were stored at 4°C for 24, 72, and 144 h before evaluated for semen quality parameters. The second fraction used for freezing was chilled for 3 h at 4°C, packed into 0.25 mL straws and then cryopreserved in liquid nitrogen. The samples were then evaluated after 7 and 14 days. Chilled and frozen semen samples were thawed at 37°C and assessed for general motility using computer-assisted semen analysis, viability, acrosome integrity and morphology (eosin-nigrosin stain), membrane integrity, and lipid peroxidation using thiobarbituric acid reaction test. RESULTS The results showed that all the quality parameters assessed were significantly (p<0.05) improved at 1.5% SL concentration in chilled semen. Treatment groups of 1, 1.25, 1.5, and 1.75% SL were higher in quality parameters than the control group (C+) in chilled semen. However, all the quality parameters in frozen-thawed semen were significantly higher in the C+ than the treated groups. CONCLUSION In conclusion, supplementation of 1.5% SL in 2% VCO Tris-based extender enhanced the chilled bull semen. However, there was no marked improvement in the frozen-thawed quality parameters after treatment.
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Affiliation(s)
- A A Tarig
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia.,Department of Dairy Production, Faculty of Animal Production, University of Khartoum, Sudan
| | - H Wahid
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - Y Rosnina
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - N Yimer
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - Y M Goh
- Department of Veterinary Pre-Clinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - F H Baiee
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - A M Khumran
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - H Salman
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - M A Assi
- Department of Veterinary Pre-Clinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - M Ebrahimi
- Department of Veterinary Pre-Clinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
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Galeotti G, Ebrahimi M, Lipton-Duffin J, MacLeod JM, Rondeau-Gagné S, Morin JF, Rosei F. 2D Supramolecular networks of dibenzonitrilediacetylene on Ag(111) stabilized by intermolecular hydrogen bonding. Phys Chem Chem Phys 2017; 19:10602-10610. [PMID: 28397886 DOI: 10.1039/c7cp01058c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The two-dimensional (2D) surface-directed self-assembly of dibenzonitrile diacetylene (DBDA) on Ag(111) under ultrahigh vacuum (UHV) conditions was investigated by combining scanning tunneling microscopy (STM), X-ray photoelectron spectroscopy (XPS) and theoretical simulations based on density functional theory (DFT) calculations. The molecule consists of two benzonitrile groups (-C6H4-C[triple bond, length as m-dash]N) on each side of a diacetylene (-C[triple bond, length as m-dash]C-C[triple bond, length as m-dash]C-) backbone. The terminating nitrile (-C[triple bond, length as m-dash]N) groups at the meta position of the phenyl rings lead to cis and trans stereoisomers. The trans isomer is prochiral and can adsorb in the R or S configuration, leading to the formation of enantiomeric self-assembled networks on the surface. We identify two simultaneously present supramolecular networks, termed parallel and chevron phases, as well as a less frequently observed butterfly phase. These networks are formed from pure R (or S) domains, racemic mixtures (RS), and cis isomers, respectively. Our complementary data illustrates that the formation of the 2D supramolecular networks is driven by intermolecular hydrogen bonding between nitrile and phenyl groups (-C[triple bond, length as m-dash]NH-C6H3). This study illustrates that the molecular arrangement of each network depends on the geometry of the isomers. The orientation of the nitrile group controls the formation of the most energetically stable network via intermolecular hydrogen bonding.
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Affiliation(s)
- G Galeotti
- Centre Énergie, Matériaux et Télécommunications, Institut National de la Recherche Scientifique, 1650 Boulevard Lionel-Boulet, Varennes, QC J3X 1S2, Canada.
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Tarig AA, Wahid H, Rosnina Y, Yimer N, Goh YM, Baiee FH, Khumran AM, Salman H, Ebrahimi M. Effect of different concentrations of egg yolk and virgin coconut oil in Tris-based extenders on chilled and frozen-thawed bull semen. Anim Reprod Sci 2017; 182:21-27. [PMID: 28511862 DOI: 10.1016/j.anireprosci.2017.03.024] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 03/31/2017] [Indexed: 11/24/2022]
Abstract
The aim of this study was to evaluate the effects of 8% virgin coconut oil (VCO) combined with different percentages of egg yolk in Tris extender on the quality of chilled and frozen-thawed bull semen. A total of 24 ejaculates from four bulls were collected using an electroejaculator. Semen samples were diluted with 8% VCO in Tris extender which contained different concentrations 0% (control), 4%, 8%, 12%, 16% and 20% egg yolk. The diluted semen samples were divided into two fractions: one was chilled and stored at 4°C until evaluation after 24, 72, and 144h; the second fraction was processed by chilling for 3h at 4°C to equilibrate, then packaged in 0.25ml straws and frozen and stored in liquid nitrogen at -196°C until evaluation after 7 and 14 days. Both chilled and frozen semen samples were then thawed at 37°C and assessed for general motility using computer-assisted semen analysis (CASA), viability, acrosome integrity, and morphology (eosin-nigrosin), membrane integrity (hypo-osmotic swelling test) and lipid peroxidation (thiobarbituric acid-reactive substances (TBARS)). The results indicate treatments with 8%, 12%, 16% and 20% egg yolk with 8% VCO had greater sperm quality (P<0.05) as compared with the control. The treatment with 20% egg yolk had the greatest sperm quality (P<0.05) among the treated groups for both chilled and frozen-thawed semen. In conclusion, the use of 8% VCO combined with 20% egg yolk in a Tris-based extender enhanced the values for chilled and frozen-thawed quality variables of bull sperm.
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Affiliation(s)
- A A Tarig
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia; Department of Dairy Production, Faculty of Animal Production, University of Khartoum, Sudan
| | - H Wahid
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia.
| | - Y Rosnina
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - N Yimer
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - Y M Goh
- Department of Veterinary Pre-Clinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - F H Baiee
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - A M Khumran
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - H Salman
- Department of Veterinary Clinical Studies, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
| | - M Ebrahimi
- Department of Veterinary Pre-Clinical Sciences, Faculty of Veterinary Medicine, Universiti Putra Malaysia, UPM, 43400 Serdang, Selangor Darul Ehsan, Malaysia
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Farazandeh R, Rounaghi GH, Ebrahimi M, Basafa S. Solvent influence on complex formation between Cd2+ and 2-hydroxy-1,4-naphthoquinone in binary mixed nonaqueous solvents at 15–45°C. Russ J Phys Chem 2017. [DOI: 10.1134/s0036024417040082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Khaleghi-Rad A, Beyramabadi SA, Morsali A, Ebrahimi M, Khorzandi-Chenarboo M. Tautomerism of the antiepileptic drug Felbamate: A DFT study. J STRUCT CHEM+ 2017. [DOI: 10.1134/s0022476617020044] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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