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Fattahi M, Ebrahimi S, Rahimi M, Gonbadi M, Hosseini SH, Ahmadi G. Analyzing Burner Performance and Combustion Phenomenon in an Olefin Plant's Industrial Furnace: A CFD Study. ACS Omega 2024; 9:14500-14519. [PMID: 38559926 PMCID: PMC10976402 DOI: 10.1021/acsomega.4c00395] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Revised: 02/25/2024] [Accepted: 03/04/2024] [Indexed: 04/04/2024]
Abstract
This work presents a comprehensive study of the combustion performance of an industrial furnace in an olefin plant using computational fluid dynamics (CFD) simulations. The focus was on analyzing the heat release pattern of bottom burners to optimize the furnace efficiency in steam-cracking processes. The study developed an accurate computational fluid dynamics (CFD) model for predicting combustion behavior in a cracking furnace. The computational model was validated by comparing the simulation results with industrial data and was used to investigate the impact of burner clogging and the importance of small holes in the body of burners in the furnace. The results also provided insights into the influence of excess air, temperature distribution, fluid behavior, composition of combustion products, and thermal efficiency of the furnace. The presented results contributed to a better understanding of parameters controlling combustion performance in steam-cracking furnaces.
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Affiliation(s)
- Mohsen Fattahi
- Department
of Chemical Engineering, University of Kurdistan, Sanandaj 66177-15175, Iran
| | - Saeed Ebrahimi
- Department
of Chemical Engineering, Razi University, Kermanshah 67149-67346, Iran
| | - Masoud Rahimi
- Department
of Chemical Engineering, Razi University, Kermanshah 67149-67346, Iran
| | - Maryam Gonbadi
- Department
of Chemical Engineering, Faculty of Advanced Technologies, Shiraz University, Shiraz 71946-84471, Iran
| | | | - Goodarz Ahmadi
- Department
of Mechanical and Aerospace Engineering, Clarkson University, Potsdam, New York 13699, United States
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Riazi-Esfahani H, Jafari B, Azimi H, Rahimi M, Saeidian J, Pouya P, Faghihi H, Mirzaei A, Asadi Khameneh E, Khalili Pour E. Assessment of area and structural irregularity of retinal layers in diabetic retinopathy using machine learning and image processing techniques. Sci Rep 2024; 14:4013. [PMID: 38369610 PMCID: PMC10874958 DOI: 10.1038/s41598-024-54535-6] [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: 08/26/2023] [Accepted: 02/13/2024] [Indexed: 02/20/2024] Open
Abstract
Diabetes retinopathy prevention necessitates early detection, monitoring, and treatment. Non-invasive optical coherence tomography (OCT) shows structural changes in the retinal layer. OCT image evaluation necessitates retinal layer segmentation. The ability of our automated retinal layer segmentation to distinguish between normal, non-proliferative (NPDR), and proliferative diabetic retinopathy (PDR) was investigated in this study using quantifiable biomarkers such as retina layer smoothness index (SI) and area (S) in horizontal and vertical OCT images for each zone (fovea, superior, inferior, nasal, and temporal). This research includes 84 eyes from 57 individuals. The study shows a significant difference in the Area (S) of inner nuclear layer (INL) and outer nuclear layer (ONL) in the horizontal foveal zone across the three groups (p < 0.001). In the horizontal scan, there is a significant difference in the smoothness index (SI) of the inner plexiform layer (IPL) and the upper border of the outer plexiform layer (OPL) among three groups (p < 0.05). There is also a significant difference in the area (S) of the OPL in the foveal zone among the three groups (p = 0.003). The area (S) of the INL in the foveal region of horizontal slabs performed best for distinguishing diabetic patients (NPDR and PDR) from normal individuals, with an accuracy of 87.6%. The smoothness index (SI) of IPL in the nasal zone of horizontal foveal slabs was the most accurate at 97.2% in distinguishing PDR from NPDR. The smoothness index of the top border of the OPL in the nasal zone of horizontal slabs was 84.1% accurate in distinguishing NPDR from PDR. Smoothness index of IPL in the temporal zone of horizontal slabs was 89.8% accurate in identifying NPDR from PDR patients. In conclusion, optical coherence tomography can assess the smoothness index and irregularity of the inner and outer plexiform layers, particularly in the nasal and temporal regions of horizontal foveal slabs, to distinguish non-proliferative from proliferative diabetic retinopathy. The evolution of diabetic retinopathy throughout severity levels and its effects on retinal layer irregularity need more study.
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Affiliation(s)
- Hamid Riazi-Esfahani
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, South Kargar Street, Qazvin Square, Tehran, Iran
| | - Behzad Jafari
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, South Kargar Street, Qazvin Square, Tehran, Iran
| | - Hossein Azimi
- Faculty of Mathematical Sciences and Computer, Kharazmi University, No. 50, Taleghani Ave, Tehran, Iran
| | - Masoud Rahimi
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, South Kargar Street, Qazvin Square, Tehran, Iran
| | - Jamshid Saeidian
- Faculty of Mathematical Sciences and Computer, Kharazmi University, No. 50, Taleghani Ave, Tehran, Iran
| | - Parnia Pouya
- Research Center for Evidence-Based Medicine, Health Management and Safety Promotion Research Institute, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hooshang Faghihi
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, South Kargar Street, Qazvin Square, Tehran, Iran
| | - Arash Mirzaei
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, South Kargar Street, Qazvin Square, Tehran, Iran
| | - Esmaeil Asadi Khameneh
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, South Kargar Street, Qazvin Square, Tehran, Iran
| | - Elias Khalili Pour
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, South Kargar Street, Qazvin Square, Tehran, Iran.
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Moradi Alvand Z, Parseghian L, Aliahmadi A, Rahimi M, Rafati H. Nanoencapsulated Thymus daenensis and Mentha piperita essential oil for bacterial and biofilm eradication using microfluidic technology. Int J Pharm 2024; 651:123751. [PMID: 38159586 DOI: 10.1016/j.ijpharm.2023.123751] [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: 05/27/2023] [Revised: 12/06/2023] [Accepted: 12/27/2023] [Indexed: 01/03/2024]
Abstract
The use of essential oil (EO) nanoemulsions is expanding to meet customer demand for all-natural antibacterial agents. Thymus daenensis (T) and Mentha piperita (M) EOs were employed to make nanoemulsions (TEO and MEO NE), using Tween 80/Span 80 as surfactant/cosurfactant and a high-speed homogenizer. The TEO and MEO NEs were then characterized in terms of particle size (121, 113 nm), surface charge (-11.2 and -12.6 mV), morphology, and stability over time. Then, the antibacterial activity of EOs and their nanoformulations against Escherichia coli (E. coli) were evaluated based on various residence times, and concentrations on a microfluidic chip. The release of cytoplasmic constituents was used to compare the antibacterial activity of bulk EOs and nanoformulations. After completing MIC, MBC, and time-killing assays, the inhibitory effect of nanoformulations on E. coli biofilm formation was examined. Remarkable intensification was observed by employing a microfluidic chip owing to high-contact surface area provision between nanoemulsions and bacteria. Once compared to the conventional method for 3 h operation, the bacterial activity was nearly completely inhibited in a 24-min residence time using nanoemulsions. After 6 min of treatment, the cell membrane began to rupture, indicating that nanoemulsions could improve the antibacterial activity of bulk essential oils.
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Affiliation(s)
- Zinab Moradi Alvand
- Department of Pharmaceutical Engineering, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran; Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Liana Parseghian
- Department of Pharmaceutical Engineering, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran; Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Atousa Aliahmadi
- Department of Biology, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Masoud Rahimi
- Department of Pharmaceutical Engineering, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Hasan Rafati
- Department of Pharmaceutical Engineering, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran.
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Rahimi M, Khameneh EA, Riazi-Esfahani H, Mahmoudi T, Khalili Pour E, Kafieh R. Application of ImageJ in Optical Coherence Tomography Angiography (OCT-A): A Literature Review. J Ophthalmol 2023; 2023:9479183. [PMID: 38033422 PMCID: PMC10686712 DOI: 10.1155/2023/9479183] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/23/2023] [Accepted: 11/11/2023] [Indexed: 12/02/2023] Open
Abstract
Background This study aimed to review the literature on the application of ImageJ in optical coherence tomography angiography (OCT-A) images. Methods A general search was performed in PubMed, Google Scholar, and Scopus databases. The authors evaluated each of the selected articles in order to assess the implementation of ImageJ in OCT-A images. Results ImageJ can aid in reducing artifacts, enhancing image quality to increase the accuracy of the process and analysis, processing and analyzing images, generating comparable parameters such as the parameters that assess perfusion of the layers (vessel density (VD), skeletonized density (SD), and vessel length density (VLD)) and the parameters that evaluate the structure of the layers (fractal dimension (FD), vessel density index (VDI), and lacunarity (LAC)), and the foveal avascular zone (FAZ) that are used widely in the retinal and choroidal studies), and establishing diagnostic criteria. It can help to save time when the dataset is huge with numerous plugins and options for image processing and analysis with reliable results. Diverse studies implemented distinct binarization and thresholding techniques, resulting in disparate outcomes and incomparable parameters. Uniformity in methodology is required to acquire comparable data from studies employing diverse processing and analysis techniques that yield varied outcomes. Conclusion Researchers and professionals might benefit from using ImageJ because of how quickly and correctly it processes and analyzes images. It is highly adaptable and potent software, allowing users to evaluate images in a variety of ways. There exists a diverse range of methodologies for analyzing OCTA images through the utilization of ImageJ. However, it is imperative to establish a standardized strategy to ensure the reliability and consistency of the method for research purposes.
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Affiliation(s)
- Masoud Rahimi
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | | - Hamid Riazi-Esfahani
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Tahereh Mahmoudi
- Department of Medical Physics and Biomedical Engineering, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Elias Khalili Pour
- Retina Ward, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Rahele Kafieh
- Department of Engineering, Durham University, South Road, Durham DH1 3LE, UK
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Riazi-Esfahani H, Asadi Khameneh E, Ghassemi F, Mehrabi Bahar M, Torkashvand A, Mahmoudi A, Husein Ahmed A, Faghihi S, Rahimi M, Akbarzadeh A, Faghihi H, Khalili Pour E. Pachychoroid neovasculopathy versus macular neovascularization in age-related macular degeneration with and without shallow irregular pigment epithelial detachment. Sci Rep 2023; 13:19513. [PMID: 37945766 PMCID: PMC10636113 DOI: 10.1038/s41598-023-46891-6] [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: 05/11/2023] [Accepted: 11/06/2023] [Indexed: 11/12/2023] Open
Abstract
To compare the choroidal neovascular features of individuals with pachychoroid neovasculopathy (PNV) and neovascular age-related macular degeneration (nAMD) with and without shallow irregular pigment epithelial detachment (SIPED). Using optical coherence tomography angiography, the choroidal neovascular complexes of 27 patients with PNV, 34 patients with nAMD and SIPED, and 15 patients with nAMD without SIPED were analyzed with FIJI and AngioTool software. PNV compared to nAMD with SIPED had a greater vessel percentage area (P = 0.034), junction density (P = 0.045), average vessel length (P < 0.001), and fractal dimension (P < 0.001). PNV, compared to nAMD without SIPED, had a greater total vessel length (P = 0.002), total number of junctions (P < 0.001), junction density (P = 0.034), and fractal dimension (P = 0.005). nAMD with SIPED, compared to nAMD without SIPED, had greater vessel area, total number of junctions, total vessel length, and average vessel length (all P values < 0.001). Patients with nAMD plus SIPED and individuals with nAMD without SIPED have similar fractal dimension values (P = 0.703). Biomarkers of choroidal neovascular complexity, such as fractal dimension, can be used to differentiate PNV from nAMD with or without SIPED.
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Affiliation(s)
| | - Esmaeil Asadi Khameneh
- Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran.
- Eye Research Center, Farabi Eye Hospital, Qazvin Sq, Tehran, Iran.
| | - Fariba Ghassemi
- Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | | | | | | | - Ahmed Husein Ahmed
- Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Shahin Faghihi
- Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoud Rahimi
- Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Ali Akbarzadeh
- Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Hooshang Faghihi
- Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Elias Khalili Pour
- Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
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Akbarzadeh A, Rahimi M, Zand A, Falavarjani KG. Delayed-Onset Endophthalmitis after Intravitreal Aflibercept Injection. J Curr Ophthalmol 2023; 35:195-198. [PMID: 38250491 PMCID: PMC10795811 DOI: 10.4103/joco.joco_134_22] [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] [Received: 04/25/2022] [Revised: 11/24/2022] [Accepted: 11/25/2022] [Indexed: 01/23/2024] Open
Abstract
Purpose To describe delayed-onset infectious endophthalmitis 4 months after intravitreal aflibercept injection. Methods An 80-year-old female was referred with signs and symptoms of clinical endophthalmitis 4 months after intravitreal injection of aflibercept for choroidal neovascularization. Noninfectious causes of panuveitis were excluded and she was diagnosed with delayed-onset postinjection infectious endophthalmitis. Vitreous and aqueous specimens were prepared and antibiotics (vancomycin and ceftazidime) were injected intravitreally. Results Vitreous culture was positive for Staphylococcus epidermidis. During the 1st month after the antibiotic injections, symptoms and signs of the patient improved and became stable during the 6-month follow-ups. Conclusions Delayed-onset infectious endophthalmitis can be presented following intravitreal injections. Late presentation of uveitis in postinjected eyes needs complete investigations to rule out infectious endophthalmitis as an ophthalmic emergency.
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Affiliation(s)
- Ali Akbarzadeh
- Eye Research Center, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Masoud Rahimi
- Eye Research Center, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Amin Zand
- Eye Research Center, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Khalil Ghasemi Falavarjani
- Eye Research Center, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
- Stem Cell and Regenerative Medicine Research Center, Iran University of Medical Sciences, Tehran, Iran
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Alvand ZM, Rahimi M, Rafati H. Chitosan decorated essential oil nanoemulsions for enhanced antibacterial activity using a microfluidic device and response surface methodology. Int J Biol Macromol 2023; 239:124257. [PMID: 36996964 DOI: 10.1016/j.ijbiomac.2023.124257] [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] [Received: 01/25/2023] [Revised: 03/19/2023] [Accepted: 03/27/2023] [Indexed: 03/30/2023]
Abstract
In this work, the antibacterial activity of Satureja Khuzestanica essential oil nanoemulsions improved by employing chitosan (ch/SKEO NE) against E. coli bacterium. The optimum ch/SKEO NE with mean droplet size of 68 nm was attained at 1.97, 1.23, and 0.10%w/w of surfactant, essential oil and chitosan, using Response Surface Methodology (RSM). Applying microfluidic platform, the ch/SKEO NE resulted in improved antibacterial activity owing to the modification of surface properties. The nanoemulsion samples showed a significant rupturing effect on the E. coli bacterial cell membrane which resulted in a rapid release of cellular contents. This action was remarkably intensified by executing microfluidic chip in parallel to the conventional method. Having treated the bacteria in the microfluidic chip for 5 min with a 8 μg/mL concentration of ch/SKEO NE, the bacterial integrity disrupted quickly, and the activity was totally lost in a 10-min period at 37 μg/mL, while it took 5 h for a complete inhibition in the conventional method using the same concentration of ch/SKEO NE. It can be concluded that nanoemulsification of EOs using chitosan coating can intensify the interaction of nanodroplets with the bacterial membrane, especially within the microfluidic chips which provides high contact surface area.
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Hosseini F, Rahimi M. Experimental study and artificial intelligence modeling of dye removal in microfluidic systems. Chem Eng Technol 2023. [DOI: 10.1002/ceat.202300105] [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: 02/18/2023]
Affiliation(s)
- Fardin Hosseini
- CFD research center, Chemical Engineering Department Razi University Kermanshah Iran
- Persian Gulf Apadana petrochemical company Asalouyeh Iran
| | - Masoud Rahimi
- CFD research center, Chemical Engineering Department Razi University Kermanshah Iran
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Ghiasi R, Rahimi M. Solvent Effect on the Nonlinear Optical Property in Cr(CO)3L Complexes (L = η6-Benzene and η6-Graphene): A Theoretical Study. Russ J Phys Chem B 2023. [DOI: 10.1134/s1990793123010207] [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: 04/07/2023]
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Ghassemi F, Rahimi M, Riazi-Esfahani H, Khodabandeh A, Masoomian B, Taghizadeh S, Sharifkashani S. Massive Uveal Relapse of Retinoblastoma Presumed to Be Choroidal Tumorous Involvement: Case Series. Case Rep Ophthalmol 2023; 14:340-347. [PMID: 37901645 PMCID: PMC10601821 DOI: 10.1159/000531527] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2023] [Accepted: 06/06/2023] [Indexed: 10/31/2023] Open
Abstract
We report the choroidal and ciliary body invasion by retinoblastoma (RB) in a salvaged eye after complete and successful primary treatment. Case 1: A 25-month-old boy was referred due to group B RB lesions based on the International Classification of RB (ICRB; groups A-E) in the right eye (OD). His left eye (OS) was enucleated because of advanced group E RB. After 47 months of uneventful follow-up (F/U), a new lesion recurred and was treated with transpupillary thermotherapy. Four months later, a fast-growing pigmented subretinal mass was detected that was treated by brachytherapy with the apical dose of 80 Gy. Three weeks later, the lesion regressed completely, and no recurrence happened after 6 years of F/U. Case 2: A 4-month-old girl with a deletion in chromosome 13 was referred for bilateral RB. OD was enucleated because of unresponsive RB and anterior segment involvement. In OS, group B lesions had multiple recurrences after systemic chemotherapy. After a while, a single mass appeared in the nasal periphery which was controlled well with brachytherapy. Four months later, AC involvement was controlled with IAC, intravitreal, and intracameral chemotherapy, but posterior synechia and cataract appeared later. One year after the last treatment, UBM showed a ring-shaped ciliary body mass. Her parents refused enucleation again, and she received intravenous chemotherapy. Two years later, magnetic resonance imaging showed orbital and optic canal involvement with a deformed globe. In conclusion, RB recurrence can appear as local choroidal and ciliary body involvement even after a time of complete remission. The role of B-scan and UBM in early diagnosis and successful treatment is valuable.
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Affiliation(s)
- Fariba Ghassemi
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Retina and Vitreous Service, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Ocular Oncology Service, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Masoud Rahimi
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Hamid Riazi-Esfahani
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Retina and Vitreous Service, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Ocular Oncology Service, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Alireza Khodabandeh
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Retina and Vitreous Service, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Babak Masoomian
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Ocular Oncology Service, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Sara Taghizadeh
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Shervin Sharifkashani
- Eye Research Center, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
- Ocular Oncology Service, Farabi Eye Hospital, Tehran University of Medical Sciences, Tehran, Iran
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Akbarzadeh A, Zand A, Rahimi M, Mirshahi R, Parvaresh MM, Falavarjani KG. Unplanned Reoperation following Vitreoretinal Surgery. J Curr Ophthalmol 2023; 35:56-60. [PMID: 37680287 PMCID: PMC10481975 DOI: 10.4103/joco.joco_343_22] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 04/10/2023] [Accepted: 04/13/2023] [Indexed: 09/09/2023] Open
Abstract
Purpose To evaluate the incidence of unplanned return to the operating room following vitreoretinal surgery and assess the reasons. Methods In this retrospective case series, medical records of all patients who underwent vitreoretinal surgery were reviewed to determine the incidence and reasons of early (<30 days postoperatively) and late (≥30 days postoperatively) unplanned reoperations after the surgery. Results A total of 488 eyes of 468 patients with a mean age of 55.84 ± 18.23 years were included. Fourteen percent (68/488) of eyes required one or more unplanned reoperation following their primary surgery. These include 3.9% (19/488) for the early and 10.0% (49/488) for the late reoperation. The most common primary reason for baseline surgery was rhegmatogenous retinal detachment (RRD) without proliferative vitreoretinopathy (PVR, 38.2%), followed by RD with PVR (23.5%), and tractional RD (TRD, 19.1%). Unplanned reoperations were most common in RD with PVR (19.3%), RRD without PVR (17.2%), and TRD (14.4%). Overall, the most common reasons of the first unplanned reoperation were repeated RD with PVR (27.9%), repeated RD (19.1%), and the presence of silicone oil (SO) in the anterior chamber (AC) (10.3%). For early unplanned reoperations, SO in AC, postoperative endophthalmitis, and persistent hyphema were the most common causes. Repeated RD with PVR was the most prevalent cause of late unplanned reoperations (34.7%). In the multivariate analysis, preoperative best-corrected visual acuity (BCVA) was significantly lower in eyes with unplanned reoperation than in eyes without (P = 0.011). Conclusions Unplanned reoperation following vitreoretinal surgery is not very common, and occurs mostly in the setting of PVR, RRD, and TRD. Lower preoperative BCVA may indicate an increased chance of future unplanned reoperation(s).
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Affiliation(s)
- Ali Akbarzadeh
- Eye Research Center, Department of Ophthalmology, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Amin Zand
- Eye Research Center, Department of Ophthalmology, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Masoud Rahimi
- Eye Research Center, Department of Ophthalmology, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Reza Mirshahi
- Eye Research Center, Department of Ophthalmology, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Mehdi Parvaresh
- Eye Research Center, Department of Ophthalmology, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
| | - Khalil Ghasemi Falavarjani
- Eye Research Center, Department of Ophthalmology, The Five Senses Health Institute, Rassoul Akram Hospital, Iran University of Medical Sciences, Tehran, Iran
- Stem Cell and Regenerative Medicine Research Center, Iran University of Medical Sciences, Tehran, Iran
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Karami A, Ranjbar B, Rahimi M, Mohammadi F. Novel hybrid neuro-fuzzy model to anticipate the heat transfer in a heat exchanger equipped with a new type of self-rotating tube insert. Eur Phys J E Soft Matter 2022; 45:92. [PMID: 36383261 DOI: 10.1140/epje/s10189-022-00248-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 11/08/2022] [Indexed: 06/16/2023]
Abstract
In this investigation, a combination of the wingsuit flying search (WFS) and teaching-learning-based optimization (TLBO) algorithms is developed as a new combinatorial optimization algorithm. The proposed combinatorial algorithm is tested over some well-known benchmark functions and then integrated with the artificial neural network (ANN) to construct a novel hybrid model. After that, the obtained hybrid model is employed to anticipate the experimentally obtained values of the average Nusselt number (Nu), average friction coefficient (f) as well as thermal-hydraulic performance ratio (η), in a heat exchanger equipped with a new type of self-rotating tube insert, against governing parameters. The insert is placed in the tube side of the water heater to heat natural gas. The proposed insert consists of various numbers of self-rotating modules. Indeed, the rotating insert is introduced to create effective secondary sweeping flow on the inner side of the tube. Since this type of tube insert simultaneously provides heat transfer enhancement and undesired pressure drop, a thermal-hydraulic performance ratio is defined to consider both of them. The governing parameters are the number of inserts (0 ≤ N ≤ 30), reservoir's temperature (40 °C ≤ TR ≤ 50 °C) as well as Reynolds number (6 × 103 ≤ Re ≤ 18 × 103). It was found that the WFS-TLBO enhances the effectiveness of the main ANN in anticipating the Nusselt number (Nu), average friction coefficient (f) as well as performance ratio (η). Moreover, introducing the WFS-TLBO algorithm into the neural network provides an enhancement in the effectiveness of the hybrid models based on the single WFS and TLBO algorithms in anticipating the same parameters.
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Affiliation(s)
- Alimohammad Karami
- Department of Mechanical Engineering, Razi University, Kermanshah, Iran.
| | - Behnam Ranjbar
- Department of Chemical Industry, Technical and Vocational University (TVU), Tehran, Iran
| | - Masoud Rahimi
- Department of Chemical Engineering, Razi University, Kermanshah, Iran
- Department of Chemical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
| | - Faezeh Mohammadi
- Department of Chemical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
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13
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Moradi G, Rahimi M, Zinadini S, Hadidi S. Fabrication of the polyethersulfone/functionalized mesoporous carbon nanocomposite nanofiltration membrane for dyes and heavy metal ions removal: Experimental and quantum mechanical simulation method. POLYM ADVAN TECHNOL 2022. [DOI: 10.1002/pat.5869] [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: 11/11/2022]
Affiliation(s)
- Golshan Moradi
- Department of Chemical Engineering, Faculty of Engineering Razi University Kermanshah Iran
- Membrane Research Division, Advanced Chemical Engineering Research Center Razi University Kermanshah Iran
| | - Masoud Rahimi
- Department of Chemical Engineering, Faculty of Engineering Razi University Kermanshah Iran
- Membrane Research Division, Advanced Chemical Engineering Research Center Razi University Kermanshah Iran
| | - Sirus Zinadini
- Environmental Research Center, Department of Applied Chemistry Razi University Kermanshah Iran
| | - Saba Hadidi
- Department of Inorganic Chemistry, Faculty of Chemistry Razi University Kermanshah Iran
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14
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Poureghbal Y, Rahimi M, Akbari M. Ionic gelation of chitosan with sodium tripolyphosphate using a novel combined nebulizer and falling film system. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24234] [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: 11/08/2022]
Affiliation(s)
| | - Masoud Rahimi
- Chemical Engineering Department Razi University Kermanshah Iran
| | - Mona Akbari
- Chemical Engineering Department University of Hormozgan Bandar Abbas Iran
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15
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Lei X, Fathi J, Noorbakhsh S, Rahimi M. The Impact of Mobile-Assisted Language Learning on English as a Foreign Language Learners’ Vocabulary Learning Attitudes and Self-Regulatory Capacity. Front Psychol 2022; 13:872922. [PMID: 35800918 PMCID: PMC9255592 DOI: 10.3389/fpsyg.2022.872922] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Accepted: 04/26/2022] [Indexed: 12/02/2022] Open
Abstract
Over the past decades, English as a foreign language (EFL) learning has witnessed a heightened interest in the role of mobile-assisted language learning (MALL) in vocabulary learning. To shed more light on the impact of MALL on vocabulary learning, this study, employing a quantitative longitudinal design, aimed at examining the impact of a MALL programme on 139 EFL learners’ vocabulary learning attitudes and self-regulatory capacity. To this end, this study investigated the latent change score models of the learners’ vocabulary learning attitudes and self-regulatory capacity over time. Over the course of 1 year, various mobile applications were integrated into the regular English language instruction of the learners. The required data were collected via administering vocabulary learning attitude and self-regulating capacity in vocabulary learning scales. The data were analysed applying latent growth curve modelling to examine the participants’ longitudinal trajectories and patterns of change in the two waves of collected data. The fit indices of the latent change models revealed an increase in both the EFL learners’ vocabulary learning attitudes and their self-regulatory capacity during the 1-year MALL programme. The analysis of between-person differences also indicated that changes in both variables were positively correlated.
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Affiliation(s)
- Xiao Lei
- Department of Foreign Languages, Zunyi Medical University, Zunyi, China
| | - Jalil Fathi
- Department of English and Linguistics, Faculty of Language and Literature, University of Kurdistan, Sanandaj, Iran
- *Correspondence: Jalil Fathi,
| | - Shabnam Noorbakhsh
- Department of English and Linguistics, Faculty of Language and Literature, Islamic Azad University, Sanandaj Branch, Sanandaj, Iran
| | - Masoud Rahimi
- Department of English and Linguistics, Faculty of Language and Literature, University of Kurdistan, Sanandaj, Iran
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16
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Dadari S, Rahimi M, Zinadini S. Removal of heavy metal from aqueous medium using novel high-performance, antifouling, and antibacterial nanofiltration polyethersulfone membrane modified with green synthesized Ni-doped Al2O3. KOREAN J CHEM ENG 2022. [DOI: 10.1007/s11814-022-1150-z] [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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17
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Heravi S, Rahimi M, Shahriari M, Ebrahimi SN. Enrichment of phenolic compounds from grape (Vitis vinifera L.) pomace extract using a macroporous resin and response surface methodology. Chem Eng Res Des 2022. [DOI: 10.1016/j.cherd.2022.05.011] [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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18
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Azimi N, Rahimi M, Hosseini F, Jafari O. Investigation of mixing performance in a semi‐active T‐micromixer actuated by magnetic nanoparticles: Characterization via
Villermaux‐Dushman
reaction. CAN J CHEM ENG 2022. [DOI: 10.1002/cjce.24377] [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: 11/05/2022]
Affiliation(s)
- Neda Azimi
- Chemical Engineering Department Razi University Kermanshah Iran
| | - Masoud Rahimi
- Chemical Engineering Department Razi University Kermanshah Iran
| | - Fardin Hosseini
- Chemical Engineering Department Razi University Kermanshah Iran
| | - Omid Jafari
- Chemical Engineering Department Razi University Kermanshah Iran
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19
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Hosseini SH, Moradkhani MA, Rasteh M, Rahimi M. New Smart Models for Minimum Fluidization Velocity Forecasting in the Tapered Fluidized Beds Based on Particle Size Distribution. Ind Eng Chem Res 2021. [DOI: 10.1021/acs.iecr.1c02682] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | | | - Mojtaba Rasteh
- Department of Chemical Engineering, Hamedan University of Technology, Hamedan 65155-579, Iran
| | - Masoud Rahimi
- Department of Chemical Engineering, Razi University, Kermanshah 67149, Iran
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20
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Rahimi M, Dorian P, Cheskes S, Lebovic G, Lin S. THE EFFECT OF TIME TO TREATMENT WITH ANTIARRHYTHMIC DRUGS ON OUTCOMES IN SHOCK REFRACTORY OUT-OF-HOSPITAL CARDIAC ARREST: A SECONDARY ANALYSIS OF THE ALPS RANDOMIZED CONTROLLED TRIAL. Can J Cardiol 2021. [DOI: 10.1016/j.cjca.2021.07.113] [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: 11/17/2022] Open
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21
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Alvand ZM, Rahimi M, Rafati H. A microfluidic chip for visual investigation of the interaction of nanoemulsion of Satureja Khuzistanica essential oil and a model gram-negative bacteria. Int J Pharm 2021; 607:121032. [PMID: 34419590 DOI: 10.1016/j.ijpharm.2021.121032] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2021] [Revised: 08/16/2021] [Accepted: 08/17/2021] [Indexed: 01/08/2023]
Abstract
Nanotechnology has provided novel approaches against food born and pathogenic bacteria. Within the present study, the effects of pure and nanoemulsified essential oil derived from Satureja Khuzistanica essential oil (SKEO) on Escherichia coli (E. coli ATCC 25922) as a human pathogen has been studied using a microfluidic chip. The morphology and antibacterial activity of E. coli at disparate residence durations (from 2 to 30 min) and various nanoemulsified or pure essential oil concentrations (8.0-62.5 μg mL-1) and numerous nanoemulsion's droplet sizes from 32 to 124 nm, have been investigated in the microfluidic system. Also, the quantitative analysis including optical density, time killing assay, protein, nucleic acid and potassium release were employed to confirm the effects of bacterial inhibition taking advantage of the chip apparatus. It was revealed that the prepared nanoemulsion left a considerable destructive effect on E. coli bacterial membrane, confirmed by fast release of cytoplasmic elements including protein, nucleic acid and potassium. However, this process was remarkably intensified for both nanoemulsion and pure essential oil using the microfluidic chip versus the conventional methods. The results also revealed that after 4 min of bacterium treatment by 12.5 μg mL-1 nanoemulsion with 32 nm mean particle size, the bacterial membrane wall began to degrade rapidly, and bacterial activity was almost completely inhibited in a 20-min period. These findings may have implications in the similarly structured and phospholipid-encapsulated bacteria and viruses, like COVID-19.
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Affiliation(s)
- Zinab Moradi Alvand
- Department of Pharmaceutical Engineering, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran; Department of Phytochemistry, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Masoud Rahimi
- Department of Pharmaceutical Engineering, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran
| | - Hasan Rafati
- Department of Pharmaceutical Engineering, Medicinal Plants and Drugs Research Institute, Shahid Beheshti University, Tehran, Iran.
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22
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Moradi G, Rahimi M, Zinadini S. Novel antifouling nanofiltration
PES
membranes incorporating with
C‐KIT
‐6 for heavy metal ions removal. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5418] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Golshan Moradi
- CFD Research Centre, Department of Chemical Engineering, Faculty of Engineering Razi University Kermanshah Iran
| | - Masoud Rahimi
- CFD Research Centre, Department of Chemical Engineering, Faculty of Engineering Razi University Kermanshah Iran
| | - Sirus Zinadini
- Environmental Research Center, Department of Applied Chemistry Razi University Kermanshah Iran
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23
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Azimi N, Rahimi M, Zangenehmehr P. Numerical Study of Mixing and Mass Transfer in a Micromixer by Stimulation of Magnetic Nanoparticles in a Magnetic Field. Chem Eng Technol 2021. [DOI: 10.1002/ceat.202000030] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Neda Azimi
- Razi University CFD Research Center Chemical Engineering Department 6714716866 Kermanshah Iran
- Islamic Azad University Department of Chemical Engineering Kermanshah Branch Kermanshah Iran
| | - Masoud Rahimi
- Razi University CFD Research Center Chemical Engineering Department 6714716866 Kermanshah Iran
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24
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Akbari M, Rahimi Z, Rahimi M. Chitosan/tripolyphosphate nanoparticles in active and passive microchannels. Res Pharm Sci 2021; 16:79-93. [PMID: 33953777 PMCID: PMC8074806 DOI: 10.4103/1735-5362.305191] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2019] [Revised: 06/16/2020] [Accepted: 11/30/2020] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND AND PURPOSE In recent years, the interest in chitosan nanoparticles has increased due to their application, especially in drug delivery. The main aim of this work was to find a suitable method for simulating pharmaceutical nanoparticles with computational fluid dynamics (CFD) modeling and use it for understanding the process of nanoparticle formation in different types of microchannels. EXPERIMENTAL APPROACH Active and passive microchannels were compared to find the advantages and disadvantages of each system. Twenty-eight experiments were done on microchannels to quantify the effect of 4 parameters and their interactions on the size and polydispersity index (PDI) of nanoparticles. CFD was implemented by coupling reactive kinetics and the population balance method to simulate the synthesis of chitosan/tripolyphosphate nanoparticles in the microchannel. FINDINGS/RESULTS The passive microchannel had the best performance for nanoparticle production. The most uniform microspheres and the narrowest standard deviation (124.3 nm, PDI = 0.112) were achieved using passive microchannel. Compared to the active microchannel, the size and PDI of the nanoparticles were 28.7% and 70.5% higher for active microchannels, and 55.43% and 105.3% higher for simple microchannels, respectively. Experimental results confirmed the validity of CFD modeling. The growth and nucleation rates were determined using the reaction equation of chitosan and tripolyphosphate. CONCLUSION AND IMPLICATIONS CFD modeling by the proposed method can play an important role in the prediction of the size and PDI of chitosan/tripolyphosphate nanoparticles in the same condition and provide a new perspective for studying the production of nanoparticles by numerical methods.
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Affiliation(s)
- Mona Akbari
- Department of Chemical Engineering, University of Hormozgan, Bandar Abbas, I.R. Iran
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
| | - Zohreh Rahimi
- Medical Biology Research Center, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
- Department of Clinical Biochemistry, Medical School, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
| | - Masoud Rahimi
- CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, I.R. Iran
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25
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Ghiasi R, Rahimi M, Ahmadi R. QUANTUM-CHEMICAL INVESTIGATION OF THE COMPLEXATION OF TITANOCENE DICHLORIDE WITH C20 AND M+@C20 (M+ = Li, Na, K) CAGES. J STRUCT CHEM+ 2020. [DOI: 10.1134/s0022476620110025] [Citation(s) in RCA: 1] [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: 11/23/2022]
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26
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Beigzadeh R, Izadi M, Rahimi M. Optimization of Helical Microreactors by a Genetic Algorithm Technique. Chem Eng Technol 2020. [DOI: 10.1002/ceat.202000301] [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: 11/07/2022]
Affiliation(s)
- Reza Beigzadeh
- University of Kurdistan Pasdaran St 6617715175 Sanandaj Iran
| | - Mahtab Izadi
- Razi University Chemical Engineering Department Taghe Bostan 6714414971 Kermanshah Iran
| | - Masoud Rahimi
- Razi University Chemical Engineering Department Taghe Bostan 6714414971 Kermanshah Iran
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27
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Affiliation(s)
| | - Masoud Rahimi
- Chemical Engineering Department Razi University Kermanshah Iran
| | - Navid Tafreshi
- Chemical Engineering Department Razi University Kermanshah Iran
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28
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Wong C, Leung J, Rahimi M, Kumaraswami S. Are you sure I cannot have spinal anesthesia? A case of pseudothrombocytopenia in pregnancy. Int J Obstet Anesth 2020; 45:161-162. [PMID: 33109419 DOI: 10.1016/j.ijoa.2020.08.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 08/17/2020] [Accepted: 08/26/2020] [Indexed: 11/28/2022]
Affiliation(s)
- C Wong
- Department of Anesthesiology, New York Medical College, Westchester Medical Center, Valhalla, NY, USA.
| | - J Leung
- Department of Anesthesiology, New York Medical College, Westchester Medical Center, Valhalla, NY, USA
| | - M Rahimi
- Department of Anesthesiology, New York Medical College, Westchester Medical Center, Valhalla, NY, USA
| | - S Kumaraswami
- Department of Anesthesiology, New York Medical College, Westchester Medical Center, Valhalla, NY, USA
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29
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Hosseini F, Rahimi M. Experimental study and artificial intelligence modeling of liquid-liquid mass transfer in multiple-ring microchannels. KOREAN J CHEM ENG 2020. [DOI: 10.1007/s11814-019-0453-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [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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30
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Abstract
Background: Xanthogranulomatous pyelonephritis (XGP) is a rare chronic bacterial inflammation of the renal parenchyma and is often a diagnostic dilemma.Case Presentation: We present a challenging case of a patient with XGP. Initially thought to have had renal cell cancer she was treated accordingly with a partial nephrectomy. However, on the final pathology, she was found to have XGP and required further antibiotic therapy and referral to the infectious disease service.Discussion: Management of XGP and diagnostic pitfalls are discussed.Conclusion: XGP is a diagnostic and therapeutic dilemma. Partial Nephrectomy may be appropriate in management of XGP in select cases.
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Affiliation(s)
- S M Mohaghegh P
- Section of Urology, Department of Surgery, University of Manitoba, Winnipeg, MB, Canada
| | - R S Wong
- Section of Urology, Department of Surgery, University of Manitoba, Winnipeg, MB, Canada
| | - M Rahimi
- Department of Pathology, University of Manitoba, Winnipeg, MB, Canada
| | - F Shih
- Department of Pathology, University of Manitoba, Winnipeg, MB, Canada
| | - R Bansal
- Section of Urology, Department of Surgery, University of Manitoba, Winnipeg, MB, Canada
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31
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Dashti SH, Kasraianfard A, Ebrahimi A, Nassiri-Toosi M, Pakshir MS, Rahimi M, Jafarian A. Hemodynamic Changes and Early Recovery of Liver Graft Function after Liver Transplantation. Int J Organ Transplant Med 2020; 11:1-7. [PMID: 33324472 PMCID: PMC7724770] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/12/2023] Open
Abstract
BACKGROUND Patients with liver cirrhosis experience a hyperdynamic circulation. OBJECTIVE To investigate the association between early hemodynamic changes and graft function after liver transplant. METHODS Those patients who underwent liver transplantation in 2016 were enrolled in the study. Liver function indices measured in postoperative days (POD) 1, 3, 5, 7, 9, and 11 along with hemodynamic indices including pulse rate, systolic blood pressure (SBP), diastolic blood pressure (DBP), and central venous pressure (CVP) measured q6h in the first 3 days after transplantation were recorded. RESULTS 57 deceased-donor liver recipients with a mean±SD age of 41.4±11.8 years including 33 (58%) males were enrolled in the study. The mean±SD aspartate and alanine aminotransferases, alkaline phosphatase, and lactate dehydrogenase were significantly decreased from 1879±670.5, 369.2±40.5, 174.9±18.8, and 1907.6±323.1 U/L in POD 1 to 37.2±10.7, 243.4±37.3, 207.5±19.5, and 382.4±59.8 U/L in POD 3, respectively (p=0.028, <0.001, 0.002, and 0.001, respectively). During this period, the pulse rate of the patients was significantly (p<0.001) decreased by a median (IQR) of 28.7 (8.5-39.7) beats/min; it was significantly correlated with a decrease in serum hepatic enzymes activities during this period. SBP, DBP, and CVP were significantly increased (p<0.001 for all) during this period. Liver graft function improved significantly earlier in those patients with a mean pulse rate of 87 beats/min compared with others (p=0.03). CONCLUSIONS There may be an association between changes of hemodynamic indices, especially reduction of pulse rate, and improved graft function early after liver transplantation.
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Affiliation(s)
- S. H. Dashti
- Liver Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Hepatobiliary Surgery and Liver Transplantation Division, Department of General Surgery, Imam Khomeini Hospital Complex, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - A. Kasraianfard
- Liver Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - A. Ebrahimi
- Liver Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - M. Nassiri-Toosi
- Liver Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - M. S. Pakshir
- Liver Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - M. Rahimi
- Department of Anesthesia, Imam Khomeini Hospital Complex, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - A. Jafarian
- Liver Transplantation Research Center, Tehran University of Medical Sciences, Tehran, Iran
- Hepatobiliary Surgery and Liver Transplantation Division, Department of General Surgery, Imam Khomeini Hospital Complex, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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32
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Hosseini F, Rahimi M. Computational fluid dynamics and experimental investigations on liquid–liquid mass transfer in T-type microchannels with different mixing channel barrier shapes. SEP SCI TECHNOL 2019. [DOI: 10.1080/01496395.2019.1706569] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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: 10/25/2022]
Affiliation(s)
- Fardin Hosseini
- CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran
| | - Masoud Rahimi
- CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran
- Department of Mechanical and Industrial Engineering, University of Toronto, Toronto, Canada
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33
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Shokoohinia P, Hajialyani M, Sadrjavadi K, Akbari M, Rahimi M, Khaledian S, Fattahi A. Microfluidic-assisted preparation of PLGA nanoparticles for drug delivery purposes: experimental study and computational fluid dynamic simulation. Res Pharm Sci 2019; 14:459-470. [PMID: 31798663 PMCID: PMC6827194 DOI: 10.4103/1735-5362.268207] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [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] [Indexed: 11/05/2022] Open
Abstract
This study, for the first time, tries to provide a simultaneous experimental and computational fluid dynamic (CFD) simulation investigation for production of uniform, reproducible, and stable polylactic-co-glycolic acid (PLGA) nanoparticles. CFD simulation was carried out to observe fluid flow behavior and micromixing in microfluidic system and improve our understanding about the governing fluid profile. The major objective of such effort was to provide a carrier for controlled and sustained release profile of different drugs. Different experimental parameters were optimized to obtain PLGA nanoparticles with proper size and minimized polydispersity index. The particle size, polydispersity, morphology, and stability of nanoparticles were compared. Microfluidic system provided a platform to control over the characteristics of nanoparticles. Using microfluidic system, the obtained particles were more uniform and harmonious in size, more stable, monodisperse and spherical, while particles produced by batch method were non-spherical and polydisperse. The best size and polydispersity index in the microfluidic method was obtained using 2% PLGA and 0.0625% (w/v) polyvinyl alcohol (PVA) solutions, and the flow rate ratio of 10:0.6 for PVA and PLGA solutions. CFD simulation demonstrated the high mixing intensity of about 0.99 at optimum condition in the microfluidic system, which is the possible reason for advantageous performance of this system. Altogether, the results of microfluidic-assisted method were found to be more reproducible, predictable, and controllable than batch method for producing a nanoformulation for delivery of drugs.
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Affiliation(s)
- Parisa Shokoohinia
- Student Research Committee, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
| | - Marziyeh Hajialyani
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
| | - Komail Sadrjavadi
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
| | - Mona Akbari
- CFD Research Center, Department of Chemical Engineering, Faculty of Engineering, Razi University, Kermanshah, I.R. Iran
| | - Masoud Rahimi
- CFD Research Center, Department of Chemical Engineering, Faculty of Engineering, Razi University, Kermanshah, I.R. Iran
| | - Salar Khaledian
- Nano Drug Delivery Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
| | - Ali Fattahi
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran.,Medical Biology Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, I.R. Iran
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Rahimi M, Shahhosseini S, Sobati MA, Movahedirad S, Khodaei B, Hassanzadeh H. A novel multi-probe continuous flow ultrasound assisted oxidative desulfurization reactor; experimental investigation and simulation. Ultrason Sonochem 2019; 56:264-273. [PMID: 31101262 DOI: 10.1016/j.ultsonch.2019.04.024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 04/08/2019] [Accepted: 04/10/2019] [Indexed: 06/09/2023]
Abstract
In this work, a cylindrical multi-probe continuous flow system with different injection strategies was exploited to study ultrasound assisted oxidative desulfurization process. The effects of nozzle number, nozzle diameter, ultrasonic power and volumetric flow rate (residence time) on the desulfurization efficiency of the diesel fuel were investigated. It was found that the sulfur removal increases by increasing the nozzle diameter when the flow rate is fixed. Sulfur removal was increased by increasing the residence time, for all types of the nozzles. Injection of the aqueous phase below the horn tip in the active zone provides the conditions by which the higher interfacial area between the phases and thus greater conversion rate can be obtained. The results indicated that over 97% sulfur removal was achieved using the double-nozzle injection with nozzle diameter of 1.5 mm, residence time of 15 min, electrical power of 277.2 W and volumetric flow rates of the aqueous and oil phases 48.89 and 244.44 mL/min, respectively. The simulation results showed that choosing a proper injection strategy has an impact on the hydrodynamic and flow pattern induced by ultrasonic field and in turn could effectively influence the mixing of the two-immiscible phases. A more uniform distribution of the aqueous-phase volume fraction was observed in the system with double-nozzle injection in comparison with the single nozzle injection.
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Affiliation(s)
- Masoud Rahimi
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Shahrokh Shahhosseini
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran.
| | - Mohammad Amin Sobati
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Salman Movahedirad
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Behrang Khodaei
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Hossein Hassanzadeh
- Process Simulation and Control Research Laboratory, School of Chemical Engineering, Iran University of Science and Technology, 16846 Tehran, Iran; School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
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Ren J, Xu W, Su J, Ren X, Bender N, Habbous S, de Almeida J, Goldstein D, Cheng D, Chen Z, Mirshams M, Rahimi M, Huang S, Spreafico A, Hansen A, Kim J, Waldron J, Perez-Ordonez B, Zhao Y, Hung R, Waterboer T, Liu G. HPV Status Improves Classification of Head and Neck Gray Zone Cancers. J Dent Res 2019; 98:879-887. [PMID: 31282843 DOI: 10.1177/0022034519853771] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
In epidemiologic studies, patients with head and neck squamous cell carcinoma (HNSCC) are classified mainly by the International Classification of Diseases (ICD) codes. However, some patients are of an unclear subsite, the “gray zone” cases, which could reflect ICD coding error, absence of primary subsite, or extensive primary tumors that cross over multiple subsites of the oral cavity and oropharynx. Patients with gray zone squamous cell carcinomas were compared with patients with oral cavity squamous cell carcinoma (OSCC) or oropharyngeal squamous cell carcinoma (OPSCC) and stratified by human papillomavirus (HPV) status that was determined by p16 immunostaining or HPV serology. Comparisons consisted of clinicodemographic features and prognostic outcomes presented by Kaplan-Meier curves and Cox proportional hazards regression models, reported as hazard ratios. There were 158 consecutive patients with gray zone HNSCC diagnosed at the Princess Margaret Cancer Center between 2006 and 2017: 66 had subsite coding discrepancies against the clinician’s documentation (“discrepant” cases; e.g., the diagnosis by the clinician was OSCC, while the classification by ICD coding was OPSCC), while 92 were squamous cell carcinoma of unknown primary of the head and neck (SCCUPHN) after complete diagnostic workup. Comparators included 721 consecutive OSCC and 938 OPSCC adult cases. All HPV-positive cohorts (OPSCC, discrepant, and SCCUPHN) had similar clinicodemographic characteristics and better 3- and 5-y overall survival and disease-free survival than their HPV-negative counterparts. In contrast, HPV-negative discrepant cases had prognostic outcomes most similar to HPV-negative OPSCC cases, while HPV-negative SCCUPHN had survival outcomes most similar to those of patients with OSCC in this study. HPV-positive status can improve the classification of patients with unclear or discrepant oral/oropharyngeal subsite, an improvement over classification systems that are solely clinician defined or conducted through ICD coding. However, due to clinical practice, we could not make definitive reclassification for patients with HPV-negative gray zone HNSCC.
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Affiliation(s)
- J. Ren
- Department of Otolaryngology–Head and Neck Surgery, National Clinical Research Center for Geriatrics, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
- Medical Biophysics, Princess Margaret Cancer Centre–University Health Network, University of Toronto, Toronto, Canada
| | - W. Xu
- Department of Biostatistics, Princess Margaret Cancer Centre and Dalla Lana School of Public Health, Toronto, Canada
| | - J. Su
- Department of Biostatistics, Princess Margaret Cancer Centre and Dalla Lana School of Public Health, Toronto, Canada
| | - X. Ren
- Department of Economic Statistics, School of Statistics and Management, Shanghai University of Finance and Economics, Shanghai, China
| | - N. Bender
- Infections and Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - S. Habbous
- Medical Biophysics, Princess Margaret Cancer Centre–University Health Network, University of Toronto, Toronto, Canada
| | - J.R. de Almeida
- Department of Otolaryngology–Head and Neck Surgery, Princess Margaret Cancer Centre–University Health Network, University of Toronto, Toronto, Canada
| | - D.P. Goldstein
- Department of Otolaryngology–Head and Neck Surgery, Princess Margaret Cancer Centre–University Health Network, University of Toronto, Toronto, Canada
| | - D. Cheng
- Medical Biophysics, Princess Margaret Cancer Centre–University Health Network, University of Toronto, Toronto, Canada
| | - Z. Chen
- Medical Biophysics, Princess Margaret Cancer Centre–University Health Network, University of Toronto, Toronto, Canada
| | - M. Mirshams
- Medical Biophysics, Princess Margaret Cancer Centre–University Health Network, University of Toronto, Toronto, Canada
| | - M. Rahimi
- Medical Biophysics, Princess Margaret Cancer Centre–University Health Network, University of Toronto, Toronto, Canada
| | - S.H. Huang
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada
| | - A. Spreafico
- Division of Medical Oncology and Hematology, Department of Medicine, Princess Margaret Cancer Center, University Health Network, University of Toronto, Toronto, Canada
| | - A. Hansen
- Division of Medical Oncology and Hematology, Department of Medicine, Princess Margaret Cancer Center, University Health Network, University of Toronto, Toronto, Canada
| | - J. Kim
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada
| | - J. Waldron
- Department of Radiation Oncology, Princess Margaret Cancer Centre, University of Toronto, Toronto, Canada
| | - B. Perez-Ordonez
- Department of Laboratory Medicine and Pathology, University Health Network, University of Toronto, Toronto, Canada
| | - Y. Zhao
- Department of Otolaryngology–Head and Neck Surgery, National Clinical Research Center for Geriatrics, West China Hospital, West China Medical School, Sichuan University, Chengdu, China
| | - R. Hung
- Prosserman Centre for Population Health Research, Lunenfeld Tanenbaum Research Institute, Sinai Health System, Toronto, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - T. Waterboer
- Infections and Cancer Epidemiology, German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - G. Liu
- Medical Biophysics, Princess Margaret Cancer Centre–University Health Network, University of Toronto, Toronto, Canada
- Division of Medical Oncology and Hematology, Department of Medicine, Princess Margaret Cancer Center, University Health Network, University of Toronto, Toronto, Canada
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
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Rahimi M, Shams Khorrami A, Rezai P. Effect of device geometry on droplet size in co-axial flow-focusing microfluidic droplet generation devices. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.03.067] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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Rahimi M, Shahhosseini S, Movahedirad S. Hydrodynamic and mass transfer investigation of oxidative desulfurization of a model fuel using an ultrasound horn reactor. Ultrason Sonochem 2019; 52:77-87. [PMID: 30477791 DOI: 10.1016/j.ultsonch.2018.11.006] [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] [Subscribe] [Scholar Register] [Received: 06/22/2018] [Revised: 10/18/2018] [Accepted: 11/06/2018] [Indexed: 05/27/2023]
Abstract
Ultrasound assisted oxidative desulfurization (UAOD) is a promising technology, which can result in ultra-low sulfur fuels in order to reduce the environmental crisis. Most of the researches have been conducted with the experimental approaches. In the present study, a computational fluid dynamic (CFD) model has been developed to investigate the hydrodynamics as well as the reactions involved in a sonoreactor. The results indicate that the physical and chemical effects associated with the ultrasonic field can contribute to the enhancement of the reaction and sulfur removal rates. However, the physical effects are predominant as compared to the chemical effects. Indeed, homogenous mixing and fine micro-emulsification caused by the physical effects lead to increase the interfacial area and mass transfer rate between the immiscible aqueous and oil phases. The dibenzothiophene concentration predicted by the simulation was in a reasonably good agreement with the corresponding experimental data. Another key hydrodynamic parameter induced by ultrasonic field was turbulent kinetic energy, which can play an important role in the sulfur removal rate. The results indicate the higher desulfurization efficiency has been attained at the regions with the higher velocity fluctuations.
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Affiliation(s)
- Masoud Rahimi
- School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
| | - Shahrokh Shahhosseini
- School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran.
| | - Salman Movahedirad
- School of Chemical Engineering, Iran University of Science and Technology, P.O. Box 16765-163, Tehran, Iran
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Pirsaheb M, Hossein Davood Abadi Farahani M, Zinadini S, Zinatizadeh AA, Rahimi M, Vatanpour V. Fabrication of high-performance antibiofouling ultrafiltration membranes with potential application in membrane bioreactors (MBRs) comprising polyethersulfone (PES) and polycitrate-Alumoxane (PC-A). Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2018.10.041] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [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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Zamani N, Mohammad AA, Rahimi M, Mashayekhian M, Hashemi DB, Erfantalab P, Ostadi A, Hassanian-Moghaddam. The protocol of choice for treatment of snake bite. Toxicon 2019. [DOI: 10.1016/j.toxicon.2018.11.405] [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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Affiliation(s)
- Hosnie-Sadat Mousavi
- Islamic Azad UniversityKermanshah Branch, Department of Chemical Engineering 67189 Kermanshah Iran
| | - Masoud Rahimi
- Razi UniversityCFD Research Center, Chemical Engineering Department 67149 Kermanshah Iran
| | - Majid Mohadesi
- Kermanshah University of TechnologyFaculty of Energy, Department of Chemical Engineering 67156 Kermanshah Iran
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Rahimi M, Zahedifar M, Sadeghi E. SYNTHESIS, OPTICAL PROPERTIES AND THERMOLUMINESCENCE DOSIMETRY FEATURES OF MANGANESE DOPED Li2B4O7 NANOPARTICLES. Radiat Prot Dosimetry 2018; 181:360-367. [PMID: 29506061 DOI: 10.1093/rpd/ncy035] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2017] [Accepted: 02/09/2018] [Indexed: 06/08/2023]
Abstract
Lithium tetraborate (Li2B4O7) nanoparticles (NPs) doped with manganese (Mn) were prepared for the first time by the solid-state sintering method. NPs were characterized using X-ray diffraction, scanning electron microscopy, photoluminescence and thermoluminescence (TL) techniques. The synthesized NPs exhibited highest TL response at 0.3 wt% of Mn dopant under gamma irradiation. TL dose response is linear for the absorbed dose from 1 Gy to 20 kGy and beyond this range behaves sub-linear. Such feature makes the synthesized nanophosphor as a promising material for high-dose dosimetry applications. Low fading and good reusability were obtained for the synthesized NPs. Tm-Tstop and computerized glow curve deconvolution procedures were utilized to identify the component TL glow peaks and kinetic parameters of the produced phosphor. Other TL dosimetry features of the prepared NPs are also presented and discussed.
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Affiliation(s)
- M Rahimi
- Physics Department, University of Kashan, Kashan, I.R. Iran
| | - M Zahedifar
- Physics Department, University of Kashan, Kashan, I.R. Iran
- Institute of Nanoscience and Nanotechnology, University of Kashan, Kashan, I.R. Iran
| | - E Sadeghi
- Physics Department, University of Kashan, Kashan, I.R. Iran
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Affiliation(s)
- Negin Moradi
- CFD research center, Chemical Engineering Department, Razi University, Kermanshah, Iran
| | - Masoud Rahimi
- CFD research center, Chemical Engineering Department, Razi University, Kermanshah, Iran
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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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Izadi M, Rahimi M, Beigzadeh R. An investigation of mixing performance in helically coiled microchannels by the Villermaux/Dushman reaction. Chem Eng Res Des 2018. [DOI: 10.1016/j.cherd.2018.04.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Dehbani M, Rahimi M. Introducing ultrasonic falling film evaporator for moderate temperature evaporation enhancement. Ultrason Sonochem 2018; 42:689-696. [PMID: 29429719 DOI: 10.1016/j.ultsonch.2017.12.016] [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: 08/23/2017] [Revised: 12/09/2017] [Accepted: 12/10/2017] [Indexed: 06/08/2023]
Abstract
In the present study, Ultrasonic Falling Film (USFF), as a novel technique has been proposed to increase the evaporation rate of moderate temperature liquid film. It is a proper method for some applications which cannot be performed at high temperature, such as foodstuff industry, due to their sensitivity to high temperatures. Evaporation rate of sodium chloride solution from an USFF on an inclined flat plate compared to that for Falling Film without ultrasonic irradiation (FF) at various temperatures was investigated. The results revealed that produced cavitation bubbles have different effects on evaporation rate at different temperatures. At lower temperatures, size fluctuation and collapse of bubbles and in consequence induced physical effects of cavitation bubbles resulted in more turbulency and evaporation rate enhancement. At higher temperatures, the behavior was different. Numerous created bubbles joined together and cover the plate surface, so not only decreased the ultrasound vibrations but also reduced the evaporation rate in comparison with FF. The highest evaporation rate enhancement of 353% was obtained at 40 °C at the lowest Reynolds number of 250. In addition, the results reveal that at temperature of 40 °C, USFF has the highest efficiency compared to FF.
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Affiliation(s)
- Maryam Dehbani
- CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran
| | - Masoud Rahimi
- CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran.
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Affiliation(s)
- Negin Moradi
- CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran
| | - Masoud Rahimi
- CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran
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Fadeifard F, Raissy M, Jafarian M, Boroujeni H, Rahimi M, Faghani M. Effects of black seed (Nigella sativa), ginger (Zingiber officinale) and cone flower (Echinacea angustifolia) on the immune system of rainbow trout, Oncorhynchus mykiss. ARQ BRAS MED VET ZOO 2018. [DOI: 10.1590/1678-4162-8489] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [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] Open
Abstract
ABSTRACT This study was carried out to evaluate the effects of dietary essential oils of ginger (Zingiber officinale), black seed (Nigella sativa) and cone flower (Echinacea angustifolia) on the immune system of cultured rainbow trout, Oncorhynchus mykiss. A total of 360 fish were divided into 4 groups and 3 replicates each containing 30 fish. The fish were fed for 21 days with 1% of the herbal essential oils and with unsupplemented diet as the control group. Haematological and immune parameters including serum lysozyme, number of phagocytic bacteria, Hb, PCV, MCV, MCH, MCHC, number of RBC and WBC were studied. Treatments recorded enhancement in immune parameters compared to the control group. Significantly higher serum lysozyme level and phagocytic germs were detected in the groups fed black seed, ginger and cone flower (P<0.05). However, no significant difference was found in RBC, Hb, PCV, MCV, MCH and MCHC of fish fed the diets containing essential oils and the control group (P>0.05). The results of this study demonstrated that essential oils might strengthen the non-specific immunity of rainbow trout.
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Rahimi M, Valeh-e-Sheyda P, Zarghami R, Rashidi H. On the mixing characteristics of a poorly water soluble drug through microfluidic-assisted nanoprecipitation: Experimental and numerical study. CAN J CHEM ENG 2017. [DOI: 10.1002/cjce.23074] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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)
- Masoud Rahimi
- CFD Research Center; Chemical Engineering Department; Razi University; Taghe Bostan Kermanshah Iran
| | | | - Reza Zarghami
- Multiphase Systems Research Laboratory; School of Chemical Engineering; College of Engineering; University of Tehran; P.O. Box 11155-4563 Tehran Iran
| | - Hamed Rashidi
- Chemical Engineering Department; Kermanshah University of Technology; Kermanshah Iran
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Michel-Sendis F, Gauld I, Martinez J, Alejano C, Bossant M, Boulanger D, Cabellos O, Chrapciak V, Conde J, Fast I, Gren M, Govers K, Gysemans M, Hannstein V, Havlůj F, Hennebach M, Hordosy G, Ilas G, Kilger R, Mills R, Mountford D, Ortego P, Radulescu G, Rahimi M, Ranta-Aho A, Rantamäki K, Ruprecht B, Soppera N, Stuke M, Suyama K, Tittelbach S, Tore C, Winckel SV, Vasiliev A, Watanabe T, Yamamoto T, Yamamoto T. SFCOMPO-2.0: An OECD NEA database of spent nuclear fuel isotopic assays, reactor design specifications, and operating data. ANN NUCL ENERGY 2017. [DOI: 10.1016/j.anucene.2017.07.022] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Moradi N, Rahimi M, Moeini A, Parsamoghadam MA. Impact of ultrasound on oil yield and content of functional food ingredients at the oil extraction from sunflower. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1384016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [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)
- Negin Moradi
- CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran
| | - Masoud Rahimi
- CFD Research Center, Chemical Engineering Department, Razi University, Kermanshah, Iran
| | - Atefeh Moeini
- Department of Chemical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran
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