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Jafari S, Park J, Lu Y, Demer JL. Finite element model of ocular adduction with unconstrained globe translation. Biomech Model Mechanobiol 2024; 23:601-614. [PMID: 38418799 DOI: 10.1007/s10237-023-01794-3] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 11/16/2023] [Indexed: 03/02/2024]
Abstract
Details of the anatomy and behavior of the structures responsible for human eye movements have been extensively elaborated since the first modern biomechanical models were introduced. Based on these findings, a finite element model of human ocular adduction is developed based on connective anatomy and measured optic nerve (ON) properties, as well as active contractility of bilaminar extraocular muscles (EOMs), but incorporating the novel feature that globe translation is not otherwise constrained so that realistic kinematics can be simulated. Anatomy of the hemisymmetric model is defined by magnetic resonance imaging. The globe is modeled as suspended by anatomically realistic connective tissues, orbital fat, and contiguous ON. The model incorporates a material subroutine that implements active EOM contraction based on fiber twitch characteristics. Starting from the initial condition of 26° adduction, the medial rectus (MR) muscle was commanded to contract as the lateral rectus (LR) relaxed. We alternatively modeled absence or presence of orbital fat. During pursuit-like adduction from 26 to 32°, the globe translated 0.52 mm posteriorly and 0.1 mm medially with orbital fat present, but 1.2 mm posteriorly and 0.1 mm medially without fat. Maximum principal strains in the optic disk and peripapillary reached 0.05-0.06, and von-Mises stress 96 kPa. Tension in the MR orbital layer was ~ 24 g-force after 6° adduction, but only ~ 3 gm-f in the whole LR. This physiologically plausible simulation of EOM activation in an anatomically realistic globe suspensory system demonstrates that orbital connective tissues and fat are integral to the biomechanics of adduction, including loading by the ON.
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Affiliation(s)
- Somaye Jafari
- Stein Eye Institute, UCLA, University of California , 100 Stein Plaza, Los Angeles, CA, 90095-7002, USA
| | - Joseph Park
- Stein Eye Institute, UCLA, University of California , 100 Stein Plaza, Los Angeles, CA, 90095-7002, USA
| | - Yongtao Lu
- Department of Engineering Mechanics, Dalian University of Technology, Dalian, China
| | - Joseph L Demer
- Stein Eye Institute, UCLA, University of California , 100 Stein Plaza, Los Angeles, CA, 90095-7002, USA.
- Bioengineering Department, University of California, Los Angeles, USA.
- Neuroscience Interdepartmental Program, University of California, Los Angeles, USA.
- Department of Neurology, University of California, Los Angeles, USA.
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Abbasi E, Jafari S. Chaotic dynamics in X-ray free-electron lasers with an optical undulator. Sci Rep 2024; 14:1341. [PMID: 38228742 PMCID: PMC10791656 DOI: 10.1038/s41598-024-51891-1] [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] [Received: 09/17/2023] [Accepted: 01/10/2024] [Indexed: 01/18/2024] Open
Abstract
In this work, the chaotic motions of relativistic electrons in X-ray free-electron lasers are investigated using an optical undulator in the presence of a magnetized ion-channel background. To miniaturize X-ray light sources, the optical undulator is a promising concept. The optical undulator provides higher optical gain than conventional magnetostatic undulators due to its micrometer wavelength. In addition, it reduces the required electron beam energy from several GeV to the multi-MeV range to produce X-ray pulses. The interaction of an optical undulator with an intense relativistic electron beam is a highly non-linear phenomenon that can lead to chaotic dynamics. At synchrotron radiation sources, the possibility of chaos control for X-ray FELs can be critical for certain classes of experimental studies. The equations of motion for a relativistic electron propagating through the optical undulator in the presence of a magnetized ion-channel can be derived from the Hamiltonian of the interaction region. Simulation results revealed that the intensity of the perturbation route from orderly behavior to chaos depends on the beam density, axial magnetic field strength, ion-channel density parameter, and pump laser undulator. Specific values of parameters were obtained for the transition from regular to chaotic paths. Bifurcation diagrams of the system were plotted to demonstrate the origin of chaos at a critical point, and Poincaré maps were created to distinguish between chaotic and orderly motions of electrons. The proposed new scheme can help to improve X-ray FELs, which have potential usages in basic sciences, medicine, and industry.
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Affiliation(s)
- E Abbasi
- Department of Physics, Faculty of Science, University of Guilan, Rasht, 41335-1914, Iran
| | - S Jafari
- Department of Physics, Faculty of Science, University of Guilan, Rasht, 41335-1914, Iran.
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Dezhpour A, Ghafouri H, Jafari S, Nilkar M. Effects of cold atmospheric-pressure plasma in combination with doxorubicin drug against breast cancer cells in vitro and invivo. Free Radic Biol Med 2023; 209:202-210. [PMID: 37890599 DOI: 10.1016/j.freeradbiomed.2023.10.405] [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: 09/28/2023] [Revised: 10/21/2023] [Accepted: 10/24/2023] [Indexed: 10/29/2023]
Abstract
Cold atmospheric plasma (CAP) has been suggested for medical applications that can be applied indirectly through plasma-activated medium (PAM) and recently it has been introduced as an innovative therapeutic approach for all cancer types. Studies have exhibited that ROS/RNS are key factors in CAP-dependent apoptosis; nevertheless, ROS/RNS stability are weak. Combination therapy is considered an effective strategy to overcome these problems. In the present research, we revealed that the combination of CAP and doxorubicin (DOX) significantly induces the apoptosis of breast cancer cells both in vitro and in vivo. Our results indicated that both Ar and He/O2 CAP treatment as well as DOX drug alone reduced cell growth. CAP/PAM treatment in combination with DOX induced apoptosis in MCF-7 breast cancer cells and 4T1-implanted BALB/c mice, resulting in a significant increase in antitumor activity. The apoptotic effects of CAP-DOX on MCF-7 cells were inferred from altered expression of BAX and cleaved-caspase-3 which mechanistically take place through the mitochondrial pathway mediated by Bcl-2 family members. Besides, the BAX/BCL-2 ratio is significantly higher in the simultaneous treatment of CAP and DOX. This ratio was equal to 2.82 ± 0.24, 2.54 ± 0.30, and 11.27 ± 0.31 for treatment with DOX, He/O2 plasma, and combination treatment, respectively. Additionally, the tumor growth rate of He/O2-PAM + DOX and Ar-PAM + DOX treatments was significantly inhibited by PAM-injection, and the tumor growth rate of PAM alone or DOX alone was slightly reduced. It can be concluded that the effect of PAM + DOX may increase the anticancer activity and decrease the dose required for the chemotherapeutic treatment.
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Affiliation(s)
- A Dezhpour
- Department of Physics, Faculty of Science, University of Guilan, Rasht, Iran
| | - H Ghafouri
- Department of Biology, Faculty of Science, University of Guilan, Rasht, Iran.
| | - S Jafari
- Department of Physics, Faculty of Science, University of Guilan, Rasht, Iran.
| | - M Nilkar
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000, Ghent, Belgium
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Shabani H, Dezhpour A, Jafari S, Moghaddam MJM, Nilkar M. Antimicrobial activity of cold atmospheric-pressure argon plasma combined with chicory (Cichorium intybus L.) extract against P. aeruginosa and E. coli biofilms. Sci Rep 2023; 13:9441. [PMID: 37296178 PMCID: PMC10256777 DOI: 10.1038/s41598-023-35906-x] [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: 04/03/2023] [Accepted: 05/25/2023] [Indexed: 06/12/2023] Open
Abstract
The present study reports a significant combined antibacterial activity of Cichorium intybus L. (known as Chicory) natural extract with cold atmospheric-pressure argon plasma treatment against multi-drug resistant (MDR) Gram-negative bacteria. To detect reactive species that are generated in the argon plasma, optical emission spectra were recorded. The molecular bands were allocated to the hydroxyl radicals (OH) and neutral nitrogen molecules (N2). Moreover, the atomic lines form the emitted spectra were determined to argon atoms (Ar) and the oxygen atoms (O), respectively. The results revealed that Chicory extract treatment at a concentration of 0.043 g/ml reduced the metabolic activity of P. aeruginosa cells by 42%, while, a reduced metabolic activity of 50.6% was found for E. coli biofilms. Moreover, the combination of Chicory extract with 3 min Ar-plasma introduced a synergistic effect, so that it exhibited a significantly reduced metabolic activity of P. aeruginosa to 84.1%, and E. coli ones to 86.7%, respectively. The relationship between cell viability and membrane integrity of P. aeruginosa and E. coli biofilms treated with Chicory extract and argon plasma jet were also analyzed by CLSM. It was found that after the combined treatment, a noticeable membrane disruption was formed. Besides, it was concluded that E. coli biofilms showed a higher sensitivity to Ar-plasma than P. aeruginosa biofilm at longer plasma exposure times. This study suggests that the anti-biofilm therapy based on a combined effect of Chicory extract and cold argon plasma treatment can serve as a considerable green method for treatment of antimicrobial MDR bacteria.
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Affiliation(s)
- H Shabani
- Department of Physics, Faculty of Science, University of Guilan, Rasht, 41335-1914, Iran
| | - A Dezhpour
- Department of Physics, Faculty of Science, University of Guilan, Rasht, 41335-1914, Iran
| | - S Jafari
- Department of Physics, Faculty of Science, University of Guilan, Rasht, 41335-1914, Iran.
| | | | - M Nilkar
- Research Unit Plasma Technology (RUPT), Department of Applied Physics, Faculty of Engineering and Architecture, Ghent University, Sint-Pietersnieuwstraat 41 B4, 9000, Ghent, Belgium
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Faraji AR, Khoramdareh NB, Falahati F, Jafari S, Monfared SA, Faghih A. Superparamagnetic MnFe alloy composite derived from cross-bindered of chitosan/rice husk waste/iron aluminate spinel hercynite for rapid catalytic detoxification of aflatoxin B1: Structure, performance and synergistic mechanism. Int J Biol Macromol 2023; 234:123709. [PMID: 36801216 DOI: 10.1016/j.ijbiomac.2023.123709] [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] [Received: 12/27/2022] [Revised: 02/07/2023] [Accepted: 02/11/2023] [Indexed: 02/18/2023]
Abstract
The contamination of foodstuffs with aflatoxins B1 (AFB1) as carcinogen/mutagens toxin produced by Aspergillus fungi that are a major threat to the economy, safe food supply, and human health. To, we present a facile wet-impregnation and co-participation strategies for the construction of a novel superparamagnetic MnFe biocomposite (MF@CRHHT), in which dual metal oxides MnFe were anchored in/on agricultural/forestry residues (chitosan/rice husk waste/hercynite hybrid nanoparticles) and applied for rapid AFB1 detoxification by destroying in a non-thermal/microbial way. Structure, and morphology were comprehensively characterized by various spectroscopic analyses. The AFB1 removal in PMS/MF@CRHHT system followed pseudo-first-order kinetics, and exhibited excellent efficiency (99.3 % in 20 min and 83.1 % in 5.0 min) over a broad pH range (5.0-10.0). Importantly, relationship between high efficiency and physical-chemical properties, and mechanistic insight reveals that the synergistic effect could be related to the formation MnFe bond in MF@CRHHT and then mutual electron transfer between them to enhanced electron density and generate reactive oxygen species. An AFB1 decontamination pathway proposed was based on the free radical quenching experiments and analysis of the degradation intermediates. Thus, the MF@CRHHT can be applied as an efficient, cost-effective, recoverable, environment-friendly and highly efficient biomass-based activator for remediate pollution.
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Affiliation(s)
- A R Faraji
- Department of Organic Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Department of Food Science and Technology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - N Bakhshi Khoramdareh
- Department of Food Science and Technology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Nutrition and Food Sciences Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - F Falahati
- Department of Organic Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Nutrition and Food Sciences Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - S Jafari
- Department of Organic Chemistry, Faculty of Pharmaceutical Chemistry, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Nutrition and Food Sciences Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - S Arbabi Monfared
- Department of Food Science and Technology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Nutrition and Food Sciences Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - A Faghih
- Department of Food Science and Technology, Faculty of Pharmacy, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Nutrition and Food Sciences Research Center, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
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Kearton J, Palmer A, Goudousis V, Jafari S. PO-1565 Using novel silica bead TL dosimeters to determine output factors for a kV radiotherapy unit. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03529-0] [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: 10/18/2022]
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Polak W, Jafari S, Palmer A. PO-1535 Using micro silica bead TLDs for 3D dosimetry in lung SABR treatments in a moving phantom. Radiother Oncol 2022. [DOI: 10.1016/s0167-8140(22)03499-5] [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: 12/01/2022]
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Lopes LR, Losi MA, Sheikh N, Laroche C, Charron P, Gimeno J, Kaski JP, Maggioni AP, Tavazzi L, Arbustini E, Brito D, Celutkiene J, Hagege A, Linhart A, Mogensen J, Garcia-Pinilla JM, Ripoll-Vera T, Seggewiss H, Villacorta E, Caforio A, Elliott PM, Beleslin B, Budaj A, Chioncel O, Dagres N, Danchin N, Erlinge D, Emberson J, Glikson M, Gray A, Kayikcioglu M, Maggioni A, Nagy KV, Nedoshivin A, Petronio AS, Hesselink JR, Wallentin L, Zeymer U, Caforio A, Blanes JRG, Charron P, Elliott P, Kaski JP, Maggioni AP, Tavazzi L, Tendera M, Komissarova S, Chakova N, Niyazova S, Linhart A, Kuchynka P, Palecek T, Podzimkova J, Fikrle M, Nemecek E, Bundgaard H, Tfelt-Hansen J, Theilade J, Thune JJ, Axelsson A, Mogensen J, Henriksen F, Hey T, Nielsen SK, Videbaek L, Andreasen S, Arnsted H, Saad A, Ali M, Lommi J, Helio T, Nieminen MS, Dubourg O, Mansencal N, Arslan M, Tsieu VS, Damy T, Guellich A, Guendouz S, Tissot CM, Lamine A, Rappeneau S, Hagege A, Desnos M, Bachet A, Hamzaoui M, Charron P, Isnard R, Legrand L, Maupain C, Gandjbakhch E, Kerneis M, Pruny JF, Bauer A, Pfeiffer B, Felix SB, Dorr M, Kaczmarek S, Lehnert K, Pedersen AL, Beug D, Bruder M, Böhm M, Kindermann I, Linicus Y, Werner C, Neurath B, Schild-Ungerbuehler M, Seggewiss H, Pfeiffer B, Neugebauer A, McKeown P, Muir A, McOsker J, Jardine T, Divine G, Elliott P, Lorenzini M, Watkinson O, Wicks E, Iqbal H, Mohiddin S, O'Mahony C, Sekri N, Carr-White G, Bueser T, Rajani R, Clack L, Damm J, Jones S, Sanchez-Vidal R, Smith M, Walters T, Wilson K, Rosmini S, Anastasakis A, Ritsatos K, Vlagkouli V, Forster T, Sepp R, Borbas J, Nagy V, Tringer A, Kakonyi K, Szabo LA, Maleki M, Bezanjani FN, Amin A, Naderi N, Parsaee M, Taghavi S, Ghadrdoost B, Jafari S, Khoshavi M, Rapezzi C, Biagini E, Corsini A, Gagliardi C, Graziosi M, Longhi S, Milandri A, Ragni L, Palmieri S, Olivotto I, Arretini A, Castelli G, Cecchi F, Fornaro A, Tomberli B, Spirito P, Devoto E, Bella PD, Maccabelli G, Sala S, Guarracini F, Peretto G, Russo MG, Calabro R, Pacileo G, Limongelli G, Masarone D, Pazzanese V, Rea A, Rubino M, Tramonte S, Valente F, Caiazza M, Cirillo A, Del Giorno G, Esposito A, Gravino R, Marrazzo T, Trimarco B, Losi MA, Di Nardo C, Giamundo A, Musella F, Pacelli F, Scatteia A, Canciello G, Caforio A, Iliceto S, Calore C, Leoni L, Marra MP, Rigato I, Tarantini G, Schiavo A, Testolina M, Arbustini E, Di Toro A, Giuliani LP, Serio A, Fedele F, Frustaci A, Alfarano M, Chimenti C, Drago F, Baban A, Calò L, Lanzillo C, Martino A, Uguccioni M, Zachara E, Halasz G, Re F, Sinagra G, Carriere C, Merlo M, Ramani F, Kavoliuniene A, Krivickiene A, Tamuleviciute-Prasciene E, Viezelis M, Celutkiene J, Balkeviciene L, Laukyte M, Paleviciute E, Pinto Y, Wilde A, Asselbergs FW, Sammani A, Van Der Heijden J, Van Laake L, De Jonge N, Hassink R, Kirkels JH, Ajuluchukwu J, Olusegun-Joseph A, Ekure E, Mizia-Stec K, Tendera M, Czekaj A, Sikora-Puz A, Skoczynska A, Wybraniec M, Rubis P, Dziewiecka E, Wisniowska-Smialek S, Bilinska Z, Chmielewski P, Foss-Nieradko B, Michalak E, Stepien-Wojno M, Mazek B, Lopes LR, Almeida AR, Cruz I, Gomes AC, Pereira AR, Brito D, Madeira H, Francisco AR, Menezes M, Moldovan O, Guimaraes TO, Silva D, Ginghina C, Jurcut R, Mursa A, Popescu BA, Apetrei E, Militaru S, Coman IM, Frigy A, Fogarasi Z, Kocsis I, Szabo IA, Fehervari L, Nikitin I, Resnik E, Komissarova M, Lazarev V, Shebzukhova M, Ustyuzhanin D, Blagova O, Alieva I, Kulikova V, Lutokhina Y, Pavlenko E, Varionchik N, Ristic AD, Seferovic PM, Veljic I, Zivkovic I, Milinkovic I, Pavlovic A, Radovanovic G, Simeunovic D, Zdravkovic M, Aleksic M, Djokic J, Hinic S, Klasnja S, Mircetic K, Monserrat L, Fernandez X, Garcia-Giustiniani D, Larrañaga JM, Ortiz-Genga M, Barriales-Villa R, Martinez-Veira C, Veira E, Cequier A, Salazar-Mendiguchia J, Manito N, Gonzalez J, Fernández-Avilés F, Medrano C, Yotti R, Cuenca S, Espinosa MA, Mendez I, Zatarain E, Alvarez R, Pavia PG, Briceno A, Cobo-Marcos M, Dominguez F, Galvan EDT, Pinilla JMG, Abdeselam-Mohamed N, Lopez-Garrido MA, Hidalgo LM, Ortega-Jimenez MV, Mezcua AR, Guijarro-Contreras A, Gomez-Garcia D, Robles-Mezcua M, Blanes JRG, Castro FJ, Esparza CM, Molina MS, García MS, Cuenca DL, de Mallorca P, Ripoll-Vera T, Alvarez J, Nunez J, Gomez Y, Fernandez PLS, Villacorta E, Avila C, Bravo L, Diaz-Pelaez E, Gallego-Delgado M, Garcia-Cuenllas L, Plata B, Lopez-Haldon JE, Pena Pena ML, Perez EMC, Zorio E, Arnau MA, Sanz J, Marques-Sule E. Association between common cardiovascular risk factors and clinical phenotype in patients with hypertrophic cardiomyopathy from the European Society of Cardiology (ESC) EurObservational Research Programme (EORP) Cardiomyopathy/Myocarditis registry. Eur Heart J Qual Care Clin Outcomes 2022; 9:42-53. [PMID: 35138368 PMCID: PMC9745665 DOI: 10.1093/ehjqcco/qcac006] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/02/2022] [Accepted: 02/04/2022] [Indexed: 12/15/2022]
Abstract
AIMS The interaction between common cardiovascular risk factors (CVRF) and hypertrophic cardiomyopathy (HCM) is poorly studied. We sought to explore the relation between CVRF and the clinical characteristics of patients with HCM enrolled in the EURObservational Research Programme (EORP) Cardiomyopathy registry. METHODS AND RESULTS 1739 patients with HCM were studied. The relation between hypertension (HT), diabetes (DM), body mass index (BMI), and clinical traits was analysed. Analyses were stratified according to the presence or absence of a pathogenic variant in a sarcomere gene. The prevalence of HT, DM, and obesity (Ob) was 37, 10, and 21%, respectively. HT, DM, and Ob were associated with older age (P<0.001), less family history of HCM (HT and DM P<0.001), higher New York Heart Association (NYHA) class (P<0.001), atrial fibrillation (HT and DM P<0.001; Ob p = 0.03) and LV (left ventricular) diastolic dysfunction (HT and Ob P<0.001; DM P = 0.003). Stroke was more frequent in HT (P<0.001) and mutation-positive patients with DM (P = 0.02). HT and Ob were associated with higher provocable LV outflow tract gradients (HT P<0.001, Ob P = 0.036). LV hypertrophy was more severe in Ob (P = 0.018). HT and Ob were independently associated with NYHA class (OR 1.419, P = 0.017 and OR 1.584, P = 0.004, respectively). Other associations, including a higher proportion of females in HT and of systolic dysfunction in HT and Ob, were observed only in mutation-positive patients. CONCLUSION Common CVRF are associated with a more severe HCM phenotype, suggesting a proactive management of CVRF should be promoted. An interaction between genotype and CVRF was observed for some traits.
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Affiliation(s)
- Luis R Lopes
- Corresponding author. Tel: +447765109343, , Twitter handle: @LuisRLopesDr
| | - Maria-Angela Losi
- Department of Advanced Biomedical Sciences, University Federico II, Corso Umberto I, 40, Naples 80138, Italy
| | - Nabeel Sheikh
- Department of Cardiology and Division of Cardiovascular Sciences, Guy's and St. Thomas’ Hospitals and King's College London, Strand, London WC2R 2LS, UK
| | - Cécile Laroche
- EORP, European Society of Cardiology, Sophia-Antipolis, France
| | | | | | - Juan P Kaski
- Institute of Cardiovascular Science, University College London, Gower St, London WC1E 6BT, UK,Centre for Inherited Cardiovascular Diseases, Great Ormond Street Hospital, London WC1N 3JH, UK
| | - Aldo P Maggioni
- EORP, European Society of Cardiology, Sophia-Antipolis, France,Maria Cecilia Hospital, GVM Care&Research, Via Corriera, 1, Cotignola 48033 RA, Italy
| | - Luigi Tavazzi
- Maria Cecilia Hospital, GVM Care&Research, Via Corriera, 1, Cotignola 48033 RA, Italy
| | | | - Dulce Brito
- Serviço de Cardiologia, Centro Hospitalar Universitário Lisboa Norte, Lisbon 1169-050, Portugal,CCUL, Faculdade de Medicina, Universidade de Lisboa, Av. Prof. Egas Moniz MB, Lisbon 1649-028, Portugal
| | - Jelena Celutkiene
- Clinic of Cardiac and Vascular Diseases, Institute of Clinical Medicine, Faculty of Medicine, Vilnius University, Universiteto g. 3, Vilnius 01513, Lithuania,State Research Institute Centre for Innovative Medicine, Vilnius, Lithuania
| | | | - Ales Linhart
- 2nd Department of Internal Cardiovascular Medicine, General University Hospital and First Medical Faculty, Charles University, Opletalova 38, Prague 110 00, Czech Republic
| | - Jens Mogensen
- Department of Cardiology, Odense University Hospital, J. B. Winsløws Vej 4, Odense 5000, Denmark
| | - José Manuel Garcia-Pinilla
- Unidad de Insuficiencia Cardiaca y Cardiopatías Familiares. Servicio de Cardiología. Hospital Universitario Virgen de la Victoria. IBIMA. Málaga and Ciber-Cardiovascular. Instituto de Salud Carlos III. Madrid, Spain
| | - Tomas Ripoll-Vera
- Inherited Cardiovascular Disease Unit Son Llatzer University Hospital & IdISBa, Palma de Mallorca, Spain
| | - Hubert Seggewiss
- Universitätsklinikum Würzburg, Deutsches Zentrum für Herzinsuffizienz (DZHI), Comprehensive Heart Failure Center (CHFC), Am Schwarzenberg 15, Haus 15A, 97078 Wurzburg, Germany
| | - Eduardo Villacorta
- Member of National Centers of expertise for familial cardiopathies (CSUR), Cardiology Department, University Hospital of Salamanca. Institute of Biomedical Research of Salamanca (IBSAL), CIBERCV, Salamanca, Spain
| | | | - Perry M Elliott
- Institute of Cardiovascular Science, University College London, Gower St, London WC1E 6BT, UK,St. Bartholomew's Hospital, Barts Heart Centre, Barts Health NHS Trust, Whitechapel Rd, London E1 1BB, UK
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9
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Aslannejad H, Samari-Kermani M, Nezami H, Jafari S, Raoof A. Application of machine learning in colloids transport in porous media studies: Lattice Boltzmann simulation results as training data. Chem Eng Sci 2022. [DOI: 10.1016/j.ces.2022.117548] [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: 11/03/2022]
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10
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Abstract
An attempt that is made here is to apply neutrosophic sets to a medical data. By means of extended Hausdorff minimum distance we find out the core symptoms of the patients. From the minimum distance or the core symptoms we can get a clue for the type of disease affecting the patient.
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Affiliation(s)
- V Antonysamy
- Loyola Degree College (YSRR), Pulivendula 516 390, Andhra Pradesh, India
| | - M Lellis Thivagar
- School of Mathematics, Madurai Kamaraj University, Madurai 625 021, India
| | - S Jafari
- College of Vestjaelland South, Herrestraede 11, 4200 Slagelse, Denmark
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11
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Tabrizi R, Mohajerani H, Jafari S, Tümer MK. Does the serum level of vitamin D affect marginal bone loss around dental implants? Int J Oral Maxillofac Surg 2021; 51:832-836. [PMID: 34872836 DOI: 10.1016/j.ijom.2021.11.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 01/19/2021] [Revised: 07/21/2021] [Accepted: 11/11/2021] [Indexed: 11/18/2022]
Abstract
Vitamin D is effective in bone healing. The aim of this study was to assess marginal bone loss (MBL) around dental implants in patients with sufficient and insufficient serum levels of vitamin D. This was a prospective cohort study with a pre-protocol population. Patients who underwent dental implantation in the first or second molar region and had a long-cone peri-apical digital radiograph taken at the time of loading and 12 months later were studied. Patients were assigned to one of three groups based on their serum vitamin D level: group 1, the serum level of vitamin D was deficient, group 2 insufficient, and group 3 sufficient. The marginal bone level change from immediately after loading to 12 months later was considered as MBL. Analysis of variance (ANOVA) was applied to compare MBL between the three groups. Ninety patients were included (30 in each group). The mean MBL was 1.38 ± 0.33 mm in group 1, 0.89 ± 0.16 mm in group 2, and 0.78 ± 0.12 mm in group 3. Analysis of the data demonstrated a significant difference in the mean MBL among the three groups (P < 0.001). There was a correlation between MBL and vitamin D serum levels (P < 0.001). It appears that a low serum level of vitamin D may be associated with increased MBL.
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Affiliation(s)
- R Tabrizi
- Oral and Maxillofacial Surgery Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
| | - H Mohajerani
- Oral and Maxillofacial Surgery Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - S Jafari
- Oral and Maxillofacial Surgery Department, School of Dentistry, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M K Tümer
- Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Alanya Alaaddin Keykubat University, Alanya, Turkey
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12
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Masterson M, Knapton T, Davidson I, Maor R, Jafari S. PO-1642 Feasibility of incorporating bead TLDs for in vivo dosimetry into current Radiotherapy CT protocols. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)08093-2] [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: 11/30/2022]
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13
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Knapton T, Masterson M, Parmer A, Nisbet A, Jafari S. PO-1577 Evaluation of a new Automated TLD Reader for silica bead radiotherapy dosimetry. Radiother Oncol 2021. [DOI: 10.1016/s0167-8140(21)08028-2] [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: 10/20/2022]
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14
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Rahimi MM, Bagheri A, Bagheri Y, Fathi E, Bagheri S, Nia AV, Jafari S, Montazersaheb S. Renoprotective effects of prazosin on ischemia-reperfusion injury in rats. Hum Exp Toxicol 2021; 40:1263-1273. [PMID: 33559503 DOI: 10.1177/0960327121993224] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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] [Indexed: 01/23/2023]
Abstract
BACKGROUND Renal ischemia-reperfusion (IR) injury is one of the main leading causes of acute kidney injury associated with inflammation, oxidative stress and cell apoptosis. We studied the effects of prazosin, as a specific blocker of α1-AR, on renal IR injury. METHODS Rats were divided into normal control; untreated IR and prazosin-treated IR (1 mg/kg body weight). Prazosin was administered by intraperitoneal injection 30 min prior to IR induction. The level of urea/creatinine and oxidative factors were detected by colorimetric methods. Apoptosis-associated factors, inflammatory, and signaling proteins were analyzed in renal tissue. The abnormalities of renal histopathology were detected by immunohistochemistry. RESULTS Administration of prazosin to IR rats ameliorated serum urea and creatinine and IR-induced histopathological damages. Lipid peroxidation was significantly improved after treatment by prazosin in IR injury rats, however, antioxidant status was not affected. Rats subjected to IR injury activated Bax protein and NF-κB mediated inflammatory response. Moreover, treatment with prazosin inhibited renal NF-κB activation, resulting in a significant decline in pro-inflammatory cytokine of IL-6. CONCLUSION These findings suggest that prazosin could be a good candidate to attenuate renal IR injury due to its ability to modulate renal function, apoptosis and inflammation.
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Affiliation(s)
- M M Rahimi
- Kidney Research Center, 48432Tabriz University of Medical Sciences, Tabriz, Iran
| | - A Bagheri
- Department of Urology, Sina Hospital, 48432Tabriz University of Medical Sciences, Tabriz, Iran
| | - Y Bagheri
- Young Researchers and Elite Club, 201583Tabriz Branch, Islamic Azad University, Tabriz, Iran
| | - E Fathi
- Department of Clinical Sciences, Faculty of Veterinary Medicine, 56947University of Tabriz, Tabriz, Iran
| | - S Bagheri
- 475027Faculty of Veterinary Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran
| | - A V Nia
- 475027Faculty of Veterinary Medicine, Tabriz Branch, Islamic Azad University, Tabriz, Iran
| | - S Jafari
- Kidney Research Center, 48432Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Pharmaceutical Biotechnology, Faculty of Pharmacy, 48432Tabriz University of Medical Sciences, Tabriz, Iran
| | - S Montazersaheb
- Molecular Medicine Research Center, 48432Tabriz University of Medical Sciences, Tabriz, Iran
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Abstract
Purpose In order to clarify the role of the optic nerve (ON) as a load on ocular rotation, we developed a finite element model (FEM) of incremental adduction induced by active contractility of extraocular muscles (EOMs), with and without tethering by the ON. Methods Three-dimensional (3-D) horizontal rectus EOM geometries were obtained from magnetic resonance imaging of five healthy adults, and measured constitutive tissue properties were used. Active and passive strain energies of EOMs were defined using ABAQUS (Dassault Systemes) software. All deformations were assumed to be caused by EOM twitch activation that rotated the eye about a fixed center. The medial rectus (MR) muscle was commanded to additionally contract starting from 26 degrees adducted position, and the lateral rectus (LR) to relax, further adducting the eye either with or without loading by the ON. Tridimensional heat maps were generated to represent the stress and strain distributions. Results Tensions in the EOMs were physiologically plausible during incremental adduction. Force in the MR increased from 10 gm at 26 degrees adduction to approximately 28 gm at 32 degrees adduction. Under identical MR contraction, adduction with ON loading reached 32 degrees but 36 degrees without it. Maximum and minimum principal strains within the MR were 16% and 22%, respectively, but when ON loading was included, resulting stress and strain were concentrated at the optic disc. Conclusions This physiologically plausible method of simulating EOM activation can provide realistic input to model biomechanical behavior of active and passive tissues in the orbit to clarify biomechanical consequences of ON traction during adduction.
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Affiliation(s)
- Somaye Jafari
- Stein Eye Institute, University of California, Los Angeles, United States
| | - Yongtao Lu
- Department of Engineering Mechanics, Dalian University of Technology, Dalian, China
| | - Joseph Park
- Stein Eye Institute, University of California, Los Angeles, United States.,Department of Bioengineering, University of California, Los Angeles, United States
| | - Joseph L Demer
- Stein Eye Institute, University of California, Los Angeles, United States.,Biomedical Engineering Interdepartmental Program, University of California, Los Angeles, United States.,Neuroscience Interdepartmental Program, University of California, Los Angeles, United States.,Department of Neurology, University of California, Los Angeles, United States.,Department of Bioengineering, University of California, Los Angeles, United States
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Tsagkaris A, Nelis J, Ross G, Jafari S, Guercetti J, Kopper K, Zhao Y, Rafferty K, Salvador J, Migliorelli D, Salentijn G, Campbell K, Marco M, Elliot C, Nielen M, Pulkrabova J, Hajslova J. Critical assessment of recent trends related to screening and confirmatory analytical methods for selected food contaminants and allergens. Trends Analyt Chem 2019. [DOI: 10.1016/j.trac.2019.115688] [Citation(s) in RCA: 49] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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17
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Ghadiri K, Akya A, Elahi A, Jafari S, Chegenelorestani R. Evaluation of Resistance to Ciprofloxacin and Identification of Mutations in Topoisomerase Genes in Escherichia coli and Klebsiella pneumonia Isolated from Pediatric Urinary Tract Infections. jpr 2019. [DOI: 10.4274/jpr.galenos.2019.16362] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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18
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Tabrizi R, Pourdanesh F, Jafari S, Behnia P. Can platelet-rich fibrin accelerate neurosensory recovery following sagittal split osteotomy? A double-blind, split-mouth, randomized clinical trial. Int J Oral Maxillofac Surg 2019; 47:1011-1014. [PMID: 30954205 DOI: 10.1016/j.ijom.2018.04.010] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Revised: 02/27/2018] [Accepted: 04/10/2018] [Indexed: 10/17/2022]
Abstract
Neurosensory disturbance (NSD) is common following sagittal split osteotomy (SSO) surgery. The aim of this study was to evaluate the effect of platelet-rich fibrin (PRF) on neurosensory recovery following SSO. This double-blind, split-mouth, randomized clinical trial was performed on patients undergoing bilateral SSO. PRF was applied to one side (selected using computer randomization) after the osteotomy and before fixation. The other side served as the control. The two-point discrimination test and a brush directional stroke test were used to assess NSD at 6 and 12 months postoperative. Self-reported paresthesia was documented using a 10-point visual analogue scale (VAS). Twenty-one patients were included in the study. The results of the two-point discrimination test and the number of subjects who reported a true direction in the brush directional stroke test differed significantly between the treatment and control sides (P=0.001). The recovery of NSD (self-reported paresthesia) was better on the treatment side than on the control side (P=0.001). PRF may enhance the recovery of paresthesia following SSO.
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Affiliation(s)
- R Tabrizi
- Dental School, Shahid Beheshti University of Medical Sciences.
| | - F Pourdanesh
- Dental School, Shahid Beheshti University of Medical Sciences
| | - S Jafari
- Dentistry Programme, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - P Behnia
- Dental School, Shahid Beheshti University of Medical Sciences
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19
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Chua BH, Gray K, Krishnasamy M, Regan M, Zdenkowski N, Loi S, Mann B, Forbes JF, Wilcken N, Spillane A, Martin A, Badger H, Jafari S, Fong A, Mavin C, Corachan S, Arahmani A, Martinez JL, Francis P. Abstract OT2-04-03: Examining personalized radiation therapy (EXPERT): A randomised phase III trial of adjuvant radiotherapy vs observation in patients with molecularly characterized luminal A breast cancer. Cancer Res 2019. [DOI: 10.1158/1538-7445.sabcs18-ot2-04-03] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Background
Radiation therapy (RT) after breast conserving surgery (BCS) is the current standard of care for patients with early stage breast cancer. However, individual absolute recurrence risks and hence benefits of RT vary substantially. A study showed significant association between local recurrence (LR) risk and PAM50-defined intrinsic subtypes and Risk of Recurrence scores (ROR).1
The objective of EXPERT, a co-lead study of Breast Cancer Trials-Australia & New Zealand (BCT-ANZ), and Breast International Group (BIG), is to optimize local therapy for early breast cancer through precise individualized quantification of LR risk to identify patients for whom RT after BCS may be safely omitted.
Trial design
This is a randomized, non-inferiority, phase III study of women who plan to receive adjuvant endocrine therapy for Prosigna (PAM50)-defined luminal A breast cancer with ROR ≤60 resected by BCS.
Women are randomized to receive adjuvant whole breast RT and endocrine therapy or endocrine therapy alone and followed-up for 10 years after randomization.
Major eligibility criteria
Females aged ≥50 years; histologically confirmed invasive breast carcinoma ≤2 cm, grade 1 or 2, ER and PgR ≥10%, HER2-negative and node-negative; treated by BCS with negative margins for invasive carcinoma and associated DCIS; Prosigna (PAM50)-defined Luminal A subtype and ROR ≤60; and plan to receive adjuvant endocrine therapy.
Specific aims
Primary: To determine if omission of RT is not inferior to RT in terms of LR-free interval after BCS.
Secondary: To evaluate the impact of omission of RT on regional, local-regional and distant recurrence-free interval; disease-free survival (DFS); invasive DFS; overall survival; salvage RT or mastectomy rate; toxicity; endocrine therapy adherence; patient reported outcomes; and health economic outcomes.
Statistical methods
An estimated 5-year LR rate in the target population is expected to be 1% with RT. A rate of 4% is considered non-inferior as a worthwhile trade-off against RT toxicity. Using O'Brien-Fleming boundary for rejecting non-inferiority, 29 LR events are required for final analysis expected 8 years after the first patient is randomized. Two interim analyses will be conducted after 10 and 21 events. If the stratified log-rank test statistic exceeds the upper boundary at interim or final analysis, the hypothesis of non-inferiority will be rejected and it will be concluded that no RT is inferior to RT.
Accrual: Target (1170), actual: 82 (June 2018)
The study was activated in Australia in August 2017, with global activation planned for Q4 2018. Recruitment is expected to be completed in 4.5 years.
Contact information
Professor Boon Chua, UNSW Sydney and Prince of Wales Hospital, NSW, Australia; email boon.chua@health.nsw.gov.au; T +61 2 49255239. Registration: NCT02889874
References
Fitzal F, Filipits M, Fesl C, et al. Predicting local recurrence using PAM50 in postmenopausal endocrine responsive breast cancer patients. JCO 2014;32(15 suppl):1008.
Citation Format: Chua BH, Gray K, Krishnasamy M, Regan M, Zdenkowski N, Loi S, Mann B, Forbes JF, Wilcken N, Spillane A, Martin A, Badger H, Jafari S, Fong A, Mavin C, Corachan S, Arahmani A, Martinez J-L, Francis P. Examining personalized radiation therapy (EXPERT): A randomised phase III trial of adjuvant radiotherapy vs observation in patients with molecularly characterized luminal A breast cancer [abstract]. In: Proceedings of the 2018 San Antonio Breast Cancer Symposium; 2018 Dec 4-8; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2019;79(4 Suppl):Abstract nr OT2-04-03.
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Affiliation(s)
- BH Chua
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - K Gray
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - M Krishnasamy
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - M Regan
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - N Zdenkowski
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - S Loi
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - B Mann
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - JF Forbes
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - N Wilcken
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - A Spillane
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - A Martin
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - H Badger
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - S Jafari
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - A Fong
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - C Mavin
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - S Corachan
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - A Arahmani
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - J-L Martinez
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
| | - P Francis
- Prince of Wales Hospital, Randwick, NSW, Australia; Dana-Farber Cancer Institute, Boston, MA; Peter MacCallum Cancer Centre, Melbourne, VIC, Australia; The University of Sydney, Sydney, NSW, Australia; Breast Cancer Trials, Newcastle, NSW, Australia; Westmead Hospital, Sydney, NSW, Australia; The Mater Hospital, Sydney, NSW, Australia; Breast International Group, Brussels, Belgium; University of New South Wales, Sydney, NSW, Australia; University of Melbourne, Melbourne, VIC, Australia; Victorian Comprehensive Cancer Centre, Melbourne, VIC, Australia
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20
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Affiliation(s)
- Somaye Jafari
- Institute for Nanoscience & Nanotechnology (INST), Sharif University of Technology, Tehran, Iran
| | - Ramin Zakeri
- Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran
| | - Masoud Darbandi
- Institute for Nanoscience & Nanotechnology (INST), Sharif University of Technology, Tehran, Iran
- Department of Aerospace Engineering, Sharif University of Technology, Tehran, Iran
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Bayani A, Jafari S, Sprott JC, Hatef B. A chaotic model of migraine headache considering the dynamical transitions of this cyclic disease. ACTA ACUST UNITED AC 2018. [DOI: 10.1209/0295-5075/123/10006] [Citation(s) in RCA: 5] [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: 11/20/2022]
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Faerber C, Linet M, Aboelyazeid O, Neuhaus M, Sainju S, Kalo M, Ülgüt R, Jafari S. 2.3-O4Participatory development and evaluation of a refugee health promotion programme in Germany. Eur J Public Health 2018. [DOI: 10.1093/eurpub/cky047.057] [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: 11/14/2022] Open
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23
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Shirvani H, Jafari S. Quantum regime of a plasma-wave-pumped free-electron laser in the presence of an axial magnetic field. J Synchrotron Radiat 2018; 25:316-322. [PMID: 29488908 DOI: 10.1107/s1600577517018124] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 12/20/2017] [Indexed: 06/08/2023]
Abstract
The quantum regime of a plasma-whistler-wave-pumped free-electron laser (FEL) in the presence of an axial-guide magnetic field is presented. By quantizing both the plasma whistler field and axial magnetic field, an N-particle three-dimensional Hamiltonian of quantum-FEL (QFEL) has been derived. Employing Heisenberg evolution equations and introducing a new collective operator which controls the vertical motion of electrons, a quantum dispersion relation of the plasma whistler wiggler has been obtained analytically. Numerical results indicate that, by increasing the intrinsic quantum momentum spread and/or increasing the axial magnetic field strength, the bunching and the radiation fields grow exponentially. In addition, a spiking behavior of the spectrum was observed with increasing cyclotron frequency which provides an enormous improvement in the coherence of QFEL radiation even in a limit close-to-classical regime, where an overlapping of these spikes is observed. Also, an upper limit of the intrinsic quantum momentum spread which depends on the value of the cyclotron frequency was found.
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Affiliation(s)
- H Shirvani
- Department of Physics, Shahid Beheshti University, GC, Evin, 19834 Tehran, Iran
| | - S Jafari
- Department of Physics, University of Guilan, Rasht 41335-1914, Iran
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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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25
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Palmer A, Nash D, Jafari S, Muscat S. OC-0232: Development of a novel ‘end to end’ dosimetry audit of motion management in radiotherapy. Radiother Oncol 2017. [DOI: 10.1016/s0167-8140(17)30675-8] [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: 11/30/2022]
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26
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Mair LO, Evans BA, Nacev A, Stepanov PY, Hilaman R, Chowdhury S, Jafari S, Wang W, Shapiro B, Weinberg IN. Magnetic microkayaks: propulsion of microrods precessing near a surface by kilohertz frequency, rotating magnetic fields. Nanoscale 2017; 9:3375-3381. [PMID: 28229134 DOI: 10.1039/c6nr09459g] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Surface-swimming nano- and micromotors hold significant potential for on-chip mixing, flow generation, sample manipulation, and microrobotics. Here we describe rotating microrods magnetized nearly orthogonally to their long axes. When actuated near a solid surface, these microrods demonstrate precessing motion, with rods describing a double cone similar to the motion of a kayaker's paddle. The precessing motion induces translation. At 1 kHz, these "microkayaks" move at translational velocities of ≈14 μm s-1 and generate advective flows up to 10 μm s-1.
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Affiliation(s)
- L O Mair
- Weinberg Medical Physics, Inc., North Bethesda, Maryland 20817, USA.
| | - B A Evans
- Department of Physics, Elon University, CB# 2625, Elon, North Carolina 27244, USA
| | - A Nacev
- Weinberg Medical Physics, Inc., North Bethesda, Maryland 20817, USA.
| | - P Y Stepanov
- Weinberg Medical Physics, Inc., North Bethesda, Maryland 20817, USA.
| | - R Hilaman
- Weinberg Medical Physics, Inc., North Bethesda, Maryland 20817, USA.
| | - S Chowdhury
- Weinberg Medical Physics, Inc., North Bethesda, Maryland 20817, USA.
| | - S Jafari
- Weinberg Medical Physics, Inc., North Bethesda, Maryland 20817, USA.
| | - W Wang
- School of Material Sciences and Engineering, Harbin Institute of Technology, Shenzhen Graduate School, Shenzhen, China 518055 and Center for Soft and Living Matter, Institute of Basic Sciences, Ulsan, Korea
| | - B Shapiro
- Fischell Department of Bioengineering, University of Maryland, College Park, USA
| | - I N Weinberg
- Weinberg Medical Physics, Inc., North Bethesda, Maryland 20817, USA.
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Asgari Moghaddam H, Jafari S, Mohammadi MR. Enhanced efficiency of over 10% in dye-sensitized solar cells through C and N single- and co-doped TiO2 single-layer electrodes. NEW J CHEM 2017. [DOI: 10.1039/c7nj01535f] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficiency of 10.2% is achieved using substitutional C and interstitial N atoms for C and N single- and co-doped TiO2 DSCs.
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Affiliation(s)
- H. Asgari Moghaddam
- Department of Materials Science and Engineering
- Sharif University of Technology
- Tehran
- Iran
| | - S. Jafari
- Department of Materials Science and Engineering
- Sharif University of Technology
- Tehran
- Iran
| | - M. R. Mohammadi
- Department of Materials Science and Engineering
- Sharif University of Technology
- Tehran
- Iran
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Bordbar M, Jafari S, Yeganeh-Faal A, Khodadadi B. Influence of different precursors and Mn doping concentrations on the structural, optical properties and photocatalytic activity of single-crystal manganese-doped ZnO. J IRAN CHEM SOC 2016. [DOI: 10.1007/s13738-016-1035-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Hashemi Z, Rahnama M, Jafari S. Lattice Boltzmann Simulation of Healthy and Defective Red Blood Cell Settling in Blood Plasma. J Biomech Eng 2016; 138:051002. [PMID: 26926169 DOI: 10.1115/1.4032851] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Indexed: 11/08/2022]
Abstract
In this paper, an attempt has been made to study sedimentation of a red blood cell (RBC) in a plasma-filled tube numerically. Such behaviors are studied for a healthy and a defective cell which might be created due to human diseases, such as diabetes, sickle-cell anemia, and hereditary spherocytosis. Flow-induced deformation of RBC is obtained using finite-element method (FEM), while flow and fluid-membrane interaction are handled using lattice Boltzmann (LB) and immersed boundary methods (IBMs), respectively. The effects of RBC properties as well as its geometry and orientation on its sedimentation rate are investigated and discussed. The results show that decreasing frontal area of an RBC and/or increasing tube diameter results in a faster settling. Comparison of healthy and diabetic cells reveals that less cell deformability leads to slower settling. The simulation results show that the sicklelike and spherelike RBCs have lower settling velocity as compared with a biconcave discoid cell.
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Jafari S, Mohammadi MR, Madaah Hosseini HR. Impact of Morphology and Nitrogen and Carbon Codoping on Photocatalytic Activity of TiO2 as Environmental Catalysts. Ind Eng Chem Res 2016. [DOI: 10.1021/acs.iecr.6b03053] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- S. Jafari
- Department of Materials Science
and Engineering, Sharif University of Technology, Azadi Street, Tehran, Iran
| | - M. R. Mohammadi
- Department of Materials Science
and Engineering, Sharif University of Technology, Azadi Street, Tehran, Iran
| | - H. R. Madaah Hosseini
- Department of Materials Science
and Engineering, Sharif University of Technology, Azadi Street, Tehran, Iran
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Abbasi E, Jafari S, Hedayati R. Interaction of a relativistic dense electron beam with a laser wiggler in a vacuum: self-field effects on the electron orbits and free-electron laser gain. J Synchrotron Radiat 2016; 23:1282-1295. [PMID: 27787234 DOI: 10.1107/s1600577516012601] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 08/04/2016] [Indexed: 06/06/2023]
Abstract
Employing laser wigglers and accelerators provides the potential to dramatically cut the size and cost of X-ray light sources. Owing to recent technological developments in the production of high-brilliance electron beams and high-power laser pulses, it is now conceivable to make steps toward the practical realisation of laser-pumped X-ray free-electron lasers (FELs). In this regard, here the head-on collision of a relativistic dense electron beam with a linearly polarized laser pulse as a wiggler is studied, in which the laser wiggler can be realised using a conventional quantum laser. In addition, an external guide magnetic field is employed to confine the electron beam against self-fields, therefore improving the FEL operation. Conditions allowing such an operating regime are presented and its relevant validity checked using a set of general scaling formulae. Rigorous analytical solutions of the dynamic equations are provided. These solutions are verified by performing calculations using the derived solutions and well known Runge-Kutta procedure to simulate the electron trajectories. The effects of self-fields on the FEL gain in this configuration are estimated. Numerical calculations indicate that in the presence of self-fields the sensitivity of the gain increases in the vicinity of resonance regions. Besides, diamagnetic and paramagnetic effects of the wiggler-induced self-magnetic field cause gain decrement and enhancement for different electron orbits, while these diamagnetic and paramagnetic effects increase with increasing beam density. The results are compared with findings of planar magnetostatic wiggler FELs.
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Affiliation(s)
- E Abbasi
- Department of Physics, University of Guilan, Rasht 41335-1914, Iran
| | - S Jafari
- Department of Physics, University of Guilan, Rasht 41335-1914, Iran
| | - R Hedayati
- Department of Physics, University of Guilan, Rasht 41335-1914, Iran
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Shayan P, Jafari S, Fattahi R, Ebrahimzade E, Amininia N, Changizi E. Identification and characterization of Theileria ovis surface protein (ToSp) resembled TaSp in Theileria annulata. Parasitol Res 2016; 115:1893-9. [DOI: 10.1007/s00436-016-4929-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2015] [Accepted: 01/19/2016] [Indexed: 12/01/2022]
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Bakhshalizadeh S, Hashemi A, Gaffari M, Jafari S, Farhadian M. Estimation of genetic parameters and genetic trends for biometric traits in Moghani sheep breed. Small Rumin Res 2016. [DOI: 10.1016/j.smallrumres.2015.12.030] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Mollazadeh S, Ajalli S, Kashi TSJ, Yekta BE, Javadpour J, Jafari S, Youssefi A, Fazel A. The effect of aqueous media on the mechanical properties of fluorapatite-mullite glass-ceramics. Dent Mater 2015; 31:1370-6. [PMID: 26341831 DOI: 10.1016/j.dental.2015.08.152] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [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: 01/21/2014] [Revised: 07/06/2015] [Accepted: 08/17/2015] [Indexed: 11/18/2022]
Abstract
OBJECTIVES To verify the effects of alternating thermal changes in aqueous media and chemical composition on mechanical properties of apatite-mullite glass-ceramics and to investigate concentration of ions eluted from glass-ceramics in aqueous media. MATERIALS AND METHODS The glass compositions were from SiO2Al2O3P2O5CaOTiO2BaOZrO2CaF2 system. Glass-ceramics were prepared by heat-treating at 1100°C for 3h samples alternately immersed in water at 5 and 60°C. The 3-point bending strength (n=10) were determined using 3×4×25mm/bar and a universal testing machine, at a cross-head speed of 0.1mm/min. Vickers micro hardness were evaluated by applying a total of 15-20 indentations under a 100g load for 30s. Concentrations of ions eluted from glass-ceramics immersed in 60±5°C double distilled water were determined by ion chromatography. The toxicity of glass-ceramics was assessed by seeding the osteosarcoma cells (MG63) on powder for different days and their cell proliferation assessment was investigated by MTT assay. The data were analyzed using one way analysis of variance and the means were compared by Tukey's test (5% significance level). RESULTS The highest flexural strength and hardness values after thermal changes belonged to TiO2 and ZrO2 containing glass-ceramics which contained lower amount of released ions. BaO containing glass-ceramic and sample with extra amount of silica showed the highest amount of reduction in their mechanical strength values. These additives enhanced the concentration of eluted ions in aqueous media. MTT results showed that glass-ceramics were almost equivalent concerning their in-vitro biological behavior. SIGNIFICANCE Thermal changes and chemical compositions had significant effects on flexural strength and Vickers micro-hardness values.
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Affiliation(s)
- S Mollazadeh
- Department of Material Engineering, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Siamak Ajalli
- Department of Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Bijan Eftekhai Yekta
- School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
| | - Jafar Javadpour
- School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
| | - S Jafari
- School of Metallurgy and Materials Engineering, Iran University of Science and Technology, Tehran, Iran
| | | | - Akbar Fazel
- Department of Biomaterials, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
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Akhgar AR, Nourmohammadzadeh M, Rahnama M, Jafari S, Nourmohammadzadeh HR. LATTICE BOLTZMANN METHOD NUMERICAL SIMULATION OF INTERFACIAL DYNAMICS OF DROPLETS DETACHMENT AND BREAK UP. ACTA ACUST UNITED AC 2015. [DOI: 10.17654/ijnmamar2015_021_035] [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: 11/14/2022]
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36
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Jafari S, Ashrafizadeh SG, Zeinoddini A, Rasoulinejad M, Entezari P, Seddighi S, Akhondzadeh S. Celecoxib for the treatment of mild-to-moderate depression due to acute brucellosis: a double-blind, placebo-controlled, randomized trial. J Clin Pharm Ther 2015; 40:441-6. [PMID: 26009929 DOI: 10.1111/jcpt.12287] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [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: 02/01/2015] [Accepted: 04/28/2015] [Indexed: 12/14/2022]
Abstract
WHAT IS KNOWN AND OBJECTIVE Depression is a debilitating complication of brucellosis and how best to treat this is a matter of debate. Inflammatory processes are involved in the pathogenesis of both brucellosis and depression. Therefore, we hypothesized that celecoxib could be beneficial for the treatment of depression due to brucellosis. METHODS Forty outpatients with depression due to brucellosis with a Hamilton Depression Rating Scale score (HDRS) <19 participated in a randomized, double-blind, placebo-controlled trial and underwent 8 weeks of treatment with either celecoxib (200 mg bid) or placebo as an adjunctive to antibiotic therapy. Patients were evaluated using HDRS at baseline and weeks 4 and 8. RESULT AND DISCUSSION Repeated-measures analysis demonstrated significant effect for time × treatment interaction on the HDRS score [F (1·43, 57·41) = 37·22, P < 0·001]. Significantly greater response to treatment occurred in the celecoxib group than in the placebo group at the study end [10 patients (50%) vs. no patient (0%), respectively, P < 0·001]. No serious adverse event was observed. WHAT IS NEW AND CONCLUSION Celecoxib is a safe and effective treatment for depression due to brucellosis when compared with placebo.
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Affiliation(s)
- S Jafari
- Department of Infectious Diseases, Imam Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - S-G Ashrafizadeh
- Department of Infectious Diseases, Imam Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - A Zeinoddini
- Psychiatric Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - M Rasoulinejad
- Department of Infectious Diseases, Imam Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - P Entezari
- Psychiatric Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - S Seddighi
- Imam Hospital, Ilam University of Medical Sciences, Ilam, Iran
| | - S Akhondzadeh
- Psychiatric Research Center, Roozbeh Hospital, Tehran University of Medical Sciences, Tehran, Iran
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Shakarami J, Eftekharifar R, Latifian M, Jafari S. Insecticidal activity and synergistic effect ofBeauvaria bassiana(Bals.) Vuill. and three botanical compounds against third instar larvae ofEphestia kuehniellaZeller. ACTA ACUST UNITED AC 2015. [DOI: 10.5958/2348-7542.2015.00044.3] [Citation(s) in RCA: 4] [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: 10/23/2022]
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Jafari S, Akbari Alashti R, Hosseinipour SJ. Comparison of Ductile Fracture Models on Load Bearing Capacity of a Dented Aluminum Pipe Subjected to Internal Pressure. Arab J Sci Eng 2014. [DOI: 10.1007/s13369-014-1349-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Jafari S, Hashemi A. Estimation of genetic parameters for body measurements and their association with yearling liveweight in the Makuie sheep breed. S AFR J ANIM SCI 2014. [DOI: 10.4314/sajas.v44i2.6] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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40
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Moghimi M, Eghdam Zamiri R, Jafari S, Nazarian M, Talebipoor B, Rostamkhani M, Khademolmelle A, Moghadam JK, Atarian S, Shokoofi S. P0085 Serum pepsinogen I and II levels and relationship with serum ghrelin in Iranian patients with various upper gastrointestinal diseases. Eur J Cancer 2014. [DOI: 10.1016/j.ejca.2014.03.129] [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: 10/25/2022]
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41
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Khosravisamani M, Maliji G, Seyfi S, Azadmehr A, Abd Nikfarjam B, Madadi S, Jafari S. Effect of the menstrual cycle on inflammatory cytokines in the periodontium. J Periodontal Res 2014; 49:770-6. [PMID: 24673464 DOI: 10.1111/jre.12161] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/22/2013] [Indexed: 01/23/2023]
Abstract
BACKGROUND AND OBJECTIVE The effects of different levels of steroid hormones, as experienced during puberty, pregnancy and menopause, on the periodontium have been demonstrated, but changes in sex hormone levels during the menstrual cycle, and the influence of these changes on the periodontium, remain unresolved. The aim of this study was to investigate the effect of the menstrual cycle on the levels of interleukin-1beta (IL-1β) and tumor necrosis factor-alpha (TNF-α) in gingival crevicular fluid and on periodontal clinical parameters, including the gingival bleeding index (GBI) and the modified gingival index (MGI), in periodontally healthy women. MATERIAL AND METHODS Twenty-seven periodontally healthy women with a regular menstrual cycle were included in the study. Clinical parameters, including the GBI, the MGI and the simplified oral health index, were recorded during menstruation, ovulation and premenstruation phases (e.g. on days 1-2, 12-14 and 22-24, respectively) of the menstrual cycle. Gingival crevicular fluid and unstimulated saliva were collected, at each study phase, for assessment of IL-1β, TNF-α, estrogen and progesterone. RESULTS Both the GBI and the MGI increased significantly during the menstrual cycle, and were significantly higher during ovulation than during menstruation or premenstruation (p < 0.001). No significant change in the simplified oral health index was observed during the menstrual cycle ( p = 0.18). The levels of IL-1β and TNF-α increased during the different phases of the menstrual cycle, but only the change in the TNF-α concentration was significant ( p < 0.05). CONCLUSION This study indicated that changes occurring during the menstrual cycle influence the periodontium and induce inflammatory conditions.
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Affiliation(s)
- M Khosravisamani
- Department of Periodontology and Implantology, Dental Materials Research Center, Dental Faculty, Babol University of Medical Sciences and Health Services, Babol, Iran
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Jafari S, Babaeipour V, Seyedi HE, Rahaie M, Mofid M, Haddad L, Namvaran M, Fallah J. Recombinant production of mecasermin in E. coli expression system. Res Pharm Sci 2014; 9:453-61. [PMID: 26339260 PMCID: PMC4326983] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
Human Insulin-like growth factor 1 (hIGF-1) consists of 70 amino acids in a single chain with three intermolecular disulfide bridges possessing valuable therapeutic effects. To date, numerous variants of specifically engineered hIGF-1 have been produced so as to improve hIGF-1 biological activity, stability and stronger binding to IGF-1 receptor. Mecasermin is one of the modified variants with one amino acid substitution near the N-terminal (T4I) approved for the treatment of growth failure diabetes, wound healing, amyotrophic lateral sclerosis and severe primary IGF-1 deficiency. No scientific report for recombinant production of mecasermin in Escherichia coli (E. coli) expression system has been sofar reported. In the present study, we therefore investigated the overexpression of mecasermin in two different E. coli strains in order to obtain higher yield of recombinant protein. To achieve this goal, mecasermin DNA encoding sequence was designed based on polypeptide sequence, optimized according to E. coli codon preference, and cloned in pET15b. Recombinant vector, pET15-mecasermin, transferred into two E. coli strains rigami B (DE3) and BL21 (DE3) and induced for expression in a small scale. Results revealed the E. coli Origami B (DE3) expression system was a preferable host for mecasermin production due to its high expression level being around twice as much as BL21 (DE3). Large scale mecasermin production was performed in batch culture and produced recombinant protein specifically confirmed by western blotting and mass spectroscopy. Since major part of recombinant mecasermin was expressed as inclusion body, isolation and refolding was accomplished through developed purification procedure, and finally recombinant protein was successfully purified by gel filtration chromatography.
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Affiliation(s)
- S. Jafari
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, I.R. Iran
| | - V. Babaeipour
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, I.R. Iran,Biochemistry Group, Biotechnology Research Center, Malek Ashtar University of Technology, Tehran, I.R. Iran
| | - H.A. Eslampanah Seyedi
- Department of Biochemistry, Isfahan Pharmaceutical Research Center and Bioinformatics Research Center, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - M. Rahaie
- Department of Life Science Engineering, Faculty of New Science and Technologies, University of Tehran, I.R. Iran
| | - M.R. Mofid
- Department of Biochemistry, Isfahan Pharmaceutical Research Center and Bioinformatics Research Center, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, I.R. Iran,Corresponding author: M.R. Mofid Tel: 0098 31 37922597, Fax: 0098 31 36688064
| | - L. Haddad
- Department of Biochemistry, Isfahan Pharmaceutical Research Center and Bioinformatics Research Center, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, I.R. Iran
| | - M.M. Namvaran
- Department of Pharmaceutical Biotechnology, School of Pharmacy, Shahid Beheshti University of Medical Science, Tehran, I.R. Iran
| | - J. Fallah
- Genetic Engineering Group, Biotechnology Research Center, Malek Ashtar University of Technology, Tehran, Iran
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Dimitriadis A, Hussein M, Jafari S, Kirkby K, Nisbet A, Clark C. EP-1658: Does the delivery technique impact the effect of respiratory motion in stereotactic ablative body radiotherapy? Radiother Oncol 2014. [DOI: 10.1016/s0167-8140(15)31776-x] [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: 11/24/2022]
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Asadi Gharabaghi M, Ayoobi Yazdi N, Jafari S. Lung hydatid cysts. Case Reports 2012; 2012:bcr-2012-006551. [DOI: 10.1136/bcr-2012-006551] [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: 11/03/2022] Open
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Jafari S, Bolourchifard F. 798 COMPARING THE EFFECTS OF TWO TYPES INJECTION DURATION ON SITE PAIN AND BRUISING ASSOCIATED WITH SUBCUTANEOUS HEPARIN. Eur J Pain 2012. [DOI: 10.1016/s1090-3801(06)60801-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Farhadian M, Hashemi A, Mardani K, Darvishzadeh R, Jafari S. Polymorphisms in the ovine myostatin gene are associated with birth weight but not with weight gain in Iranian Makoei sheep. Genet Mol Res 2012; 11:3568-75. [DOI: 10.4238/2012.october.4.4] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Jafari S, Esfahani S, Fazeli M, Jamalifar H, Samadi M, Samadi N, Toosi AN, Ardekani MS, Khanavi M. Antimicrobial Activity of Lime Essential Oil Against Food-borne Pathogens Isolated from Cream-filled Cakes and Pastries. ACTA ACUST UNITED AC 2011. [DOI: 10.3923/ijbc.2011.258.265] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Jafari S, HajiabdolbaghiM. M, Mohebali M, Hajjaran H, Hashemian H. Disseminated leishmaniasis caused by Leishmania tropica in HIV-positive patients in the Islamic Republic of Iran. East Mediterr Health J 2010. [DOI: 10.26719/2010.16.3.340] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Jafari S, Hajiabdolbaghi M, Mohebali M, Hajjaran H, Hashemian H. Disseminated leishmaniasis caused by Leishmania tropica in HIV-positive patients in the Islamic Republic of Iran. East Mediterr Health J 2010; 16:340-343. [PMID: 20795452] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Affiliation(s)
- S Jafari
- Department of Infectious Diseases, Imam Khomeini Hospital, Islamic Republic of Iran
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