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Jafari K, Heidari M, Fatehizadeh A, Dindarloo K, Alipour V, Rahmanian O. Extensive sorption of Amoxicillin by highly efficient carbon-based adsorbent from palm kernel: Artificial neural network modeling. Heliyon 2023; 9:e18635. [PMID: 37554818 PMCID: PMC10404958 DOI: 10.1016/j.heliyon.2023.e18635] [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: 03/17/2023] [Revised: 07/15/2023] [Accepted: 07/24/2023] [Indexed: 08/10/2023] Open
Abstract
In the present study, a new sorbent was fabricated from Palm kernel (PK) by dry thermochemical activation with NaOH and characterized by FTIR, X-ray diffraction, FE-SEM and BET, which was used for the Amoxicillin (AMX) sorption from aqueous solution. The influence of effective parameters such as pH, reaction time, adsorbent dosage, AMX concentration and ionic strength on the sorption efficacy of AMX removal were evaluated. The main functional groups on the surface of the magnetic activated carbon of Palm Kernel (MA-PK) were C-C, C-O, C[bond, double bond]O and hydroxyl groups. The specific surface of char, activated carbon Palm Kernel (AC-PK) and MA-PK were 4.3, 1648.8 and 1852.4 m2/g, respectively. The highest sorption of AMX (400 mg/L) was obtained by using 1 g/L of sorbent at solution pH of 5 after 60 min contact time, which corresponding to 98.77%. Non-linear and linear models of isotherms and kinetics models were studied. The data fitted well with Hill isotherm (R2 = 0.987) and calculated maximum sorption capacity were 719.07 and 512.27 mg/g from Hill and Langmuir, respectively. A study of kinetics shows that the adsorption of AMX follows the Elovich model with R2 = 0.9998. Based on the artificial neural network (ANN) modeling, the MA-PK dosage and contact time showed the most important parameters in the removal of AMX with relative importance of 36.5 and 25.7%, respectively. Lastly, the fabricated MA-PK was successfully used to remove the AMX from hospital wastewater.
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Affiliation(s)
- Khadijeh Jafari
- Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Mohsen Heidari
- Department of Environmental Health Engineering, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
| | - Ali Fatehizadeh
- Environment Research Center, Research Institute for Primordial Prevention of Non-Communicable Disease, Isfahan University of Medical Sciences, Isfahan, Iran
- Department of Environmental Health Engineering, School of Health, Isfahan University of Medical Sciences, Isfahan, Iran
| | - Kavoos Dindarloo
- Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Vali Alipour
- Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Omid Rahmanian
- Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
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Ersland E, Ebrahim N, Mwizerwa O, Oba T, Oku K, Nishino M, Hikimoto D, Miyoshi H, Tomotoshi K, Rahmanian O, Ekwueme E, Neville C, Sundback C. Human Vascular Wall Microfluidic Model for Preclinical Evaluation of Drug-Induced Vascular Injury. Tissue Eng Part C Methods 2022; 28:83-92. [PMID: 35114818 PMCID: PMC9022170 DOI: 10.1089/ten.tec.2021.0227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Drug-induced vascular injury (DIVI) in preclinical animal models often leads to candidate compound termination during drug development. DIVI has not been documented in human clinical trials with drugs that cause DIVI in preclinical animals. A robust human preclinical assay for DIVI is needed as an early vascular injury screen. A human vascular wall microfluidic tissue chip was developed with a human umbilical vein endothelial cell (HUVEC)-umbilical artery smooth muscle cell (vascular smooth muscle cell, VSMC) bilayer matured under physiological shear stress. Optimized temporal flow profiles produced HUVEC-VSMC bilayers with quiescent endothelial cell (EC) monolayers, EC tight junctions, and contractile VSMC morphology. Dose-response testing (3-30 μM concentration) was conducted with minoxidil and tadalafil vasodilators. Both drugs have demonstrated preclinical DIVI but lack clinical evidence. The permeability of severely damaged engineered bilayers (30 μM tadalafil) was 4.1 times that of the untreated controls. Immunohistochemical protein assays revealed contrasting perspectives on tadalafil and minoxidil-induced damage. Tadalafil impacted the endothelial monolayer with minor injury to the contractile VSMCs, whereas minoxidil demonstrated minor EC barrier injury but damaged VSMCs and activated ECs in a dose-response manner. This proof-of-concept human vascular wall bilayer model of DIVI is a critical step toward developing a preclinical human screening assay for drug development. Impact statement More than 90% of drug candidates fail during clinical trials due to human efficacy and toxicity concerns. Preclinical studies rely heavily on animal models, although animal toxicity and drug metabolism responses often differ from humans. During the drug development process, perfused in vitro human tissue chips could model the clinical drug response and potential toxicity of candidate compounds. Our long-term objective is to develop a human vascular wall tissue chip to screen for drug-induced vascular injury. Its application could ultimately reduce drug development delays and costs, and improve patient safety.
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Affiliation(s)
- Erik Ersland
- Department of Surgery, Center for Regenerative Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Neven Ebrahim
- Department of Surgery, Center for Regenerative Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA.,Department of Anatomy and Embryology, Mansoura University, Mansoura, Egypt
| | - Olive Mwizerwa
- Department of Surgery, Center for Regenerative Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Takahiro Oba
- Bioscience and Engineering Laboratories, FUJIFILM Corporation, Kanagawa, Japan
| | - Keisuke Oku
- Bioscience and Engineering Laboratories, FUJIFILM Corporation, Kanagawa, Japan
| | - Masafumi Nishino
- Bioscience and Engineering Laboratories, FUJIFILM Corporation, Kanagawa, Japan
| | - Daichi Hikimoto
- Bioscience and Engineering Laboratories, FUJIFILM Corporation, Kanagawa, Japan
| | - Hayato Miyoshi
- Bioscience and Engineering Laboratories, FUJIFILM Corporation, Kanagawa, Japan
| | - Kimihiko Tomotoshi
- Bioscience and Engineering Laboratories, FUJIFILM Corporation, Kanagawa, Japan
| | - Omid Rahmanian
- Department of Surgery, Center for Regenerative Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Emmanuel Ekwueme
- Department of Surgery, Center for Regenerative Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Craig Neville
- Department of Surgery, Center for Regenerative Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA
| | - Cathryn Sundback
- Department of Surgery, Center for Regenerative Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA.,Harvard Medical School, Boston, Massachusetts, USA.,Address correspondence to: Cathryn Sundback, ScD, Department of Surgery, Center for Regenerative Medicine, Massachusetts General Hospital, Boston, MA 01451, USA
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Shekoohiyan S, Rahmania A, Chamack M, Moussavi G, Rahmanian O, Alipour V, Giannakis S. A novel CuO/Fe2O3/ZnO composite for visible-light assisted photocatalytic oxidation of Bisphenol A: Kinetics, degradation pathways, and toxicity elimination. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2020.116821] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Rahmanian O, Falsafin M, Dinari M. High surface area benzimidazole based porous covalent organic framework for removal of methylene blue from aqueous solutions. POLYM INT 2020. [DOI: 10.1002/pi.6007] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Omid Rahmanian
- Department of Environmental Health, Faculty of HealthHormozgan University of Medical Sciences Bandar Abbas Iran
| | - Molood Falsafin
- Department of ChemistryIsfahan University of Technology Isfahan Iran
| | - Mohammad Dinari
- Department of ChemistryIsfahan University of Technology Isfahan Iran
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Nazemi M, Khaledi M, Golshan M, Ghorbani M, Amiran MR, Darvishi A, Rahmanian O. Cytotoxicity Activity and Druggability Studies of Sigmasterol Isolated from Marine Sponge Dysidea avara Against Oral Epithelial Cancer Cell (KB/C152) and T-Lymphocytic Leukemia Cell Line (Jurkat/ E6-1). Asian Pac J Cancer Prev 2020; 21:997-1003. [PMID: 32334461 PMCID: PMC7445982 DOI: 10.31557/apjcp.2020.21.4.997] [Citation(s) in RCA: 5] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2019] [Indexed: 01/21/2023] Open
Abstract
Background: Marine sponge is a rich natural resource of many pharmacological compounds and various bioactive anticancer agents are derived from marine organisms like sponges. Methods: studying the anticancer activity and Drug ability of marine sponge Dysidea avara using Cell lines oral epithelial cancer cell (KB/C152) and T-lymphocytic leukemia cell line (Jurkat/ E6-1). Marine sponge was collected from Persian Gulf. Several analytical techniques have been used to obtain and recognize stigmasterol, including column chromatography, thin layer chromatography, and gas chromatography-mass spectrometry. The PASS Prediction Activity was used to investigate the apoptosis-inducing effect of stigmasterol. The cytotoxic activity of stigmasterol was examined using yellow tetrazolium salt XTT (sodium 2, 3,-bis (2methoxy-4-nitro-5-sulfophenyl)-5-[(phenylamino) carbonyl]-2H-tetrazolium) assay. The stigmasterol were docked within the protein tyrosine kinase (PTKs) (PDB code: 1t46) and epidermal growth factor receptor (EGFRK) (PDB code: 1M17). Also, the pharmacological characteristics of stigmasterol were predicted using PerADME, SwissADME, and Molinspi ration tools. Apoptosis-inducing effect of stigmasterol indicate the stigmasterol in terms of the possibility of apoptosis in cells. Results: The apoptosis inducement results of known stigmasterol were determined by PASS on-line prediction. The compound exhibit potent cytotoxic properties against KB/C152 cell compared to Jurkat/ E6-1 cell. The stigmasterol showed the cytotoxicity effects on KB/C152 and HUT78 with IC50 ranges of 81.18 and 103.03 μg/ml, respectively. Molecular docking showed that, stigmasterol bound stably to the active sites of the protein tyrosine kinase (PTKs) (PDB code: 1t46) and epidermal growth factor receptor (EGFRK) (PDB code: 1M17). Conclusion: The compound showed desirable pharmacokinetic properties (ADME). This provided direct evidence of how a prospective anti-cancer agent can be stigmasterol. The preclinical studies paved the way for a potential new compound of anti-cancer.
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Affiliation(s)
- Melika Nazemi
- Persian Gulf and Oman Sea Ecological Center, Iranian Fisheries Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Bandar Abbas, Iran
| | - Mostafa Khaledi
- Marine Pharmaceutical Science Research Center, School of Pharmacy, Ahvaz, Jundishapur University of Medical sciences, Ahvaz, Iran
| | - Mahdi Golshan
- Iranian Fisheries Research Institute, Agricultural Research, Education and Extension Organization (AREEO), Tehran, Iran
| | | | | | - Alireza Darvishi
- Department of Food and Drug Administration, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Omid Rahmanian
- Department of Food and Drug Administration, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
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Mokhtari N, Dinari M, Rahmanian O. Novel porous organic triazine‐based polyimide with high nitrogen levels for highly efficient removal of Ni(II) from aqueous solution. POLYM INT 2019. [DOI: 10.1002/pi.5810] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Nazanin Mokhtari
- Department of ChemistryIsfahan University of Technology Isfahan Iran
| | - Mohammad Dinari
- Department of ChemistryIsfahan University of Technology Isfahan Iran
| | - Omid Rahmanian
- Department of Environmental Health, Faculty of HealthHormozgan University of Medical Sciences Bandar Abbas Iran
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Jafari K, Heidari M, Rahmanian O. Corrigendum to "Wastewater treatment for Amoxicillin removal using magnetic adsorbent synthesized by ultrasound process" [Ultrason. Sonochem. 45 (2018) 248-256]. Ultrason Sonochem 2019; 50:377. [PMID: 30017586 DOI: 10.1016/j.ultsonch.2018.07.004] [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] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Affiliation(s)
- Khadijeh Jafari
- Department of Environmental Health, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Mohsen Heidari
- Department of Environmental Health, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Omid Rahmanian
- Department of Environmental Health, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
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Rahmanian O, Dinari M, Neamati S. Synthesis and characterization of citrate intercalated layered double hydroxide as a green adsorbent for Ni 2+ and Pb 2+ removal. Environ Sci Pollut Res Int 2018; 25:36267-36277. [PMID: 30368699 DOI: 10.1007/s11356-018-3584-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 10/23/2018] [Indexed: 06/08/2023]
Abstract
Recently, a considerable attention has been paid on the preparation of layered double hydroxide (LDH) as a green adsorbent. This research presents a study on nickel and lead removal by Ca/Fe layered double hydroxides intercalate with citrate anions (Ca-Fe/LDH-Cit) which was successfully prepared through the co-precipitation and hydrothermal method. The as-synthesized Ca-Fe/LDH-Cit was characterized by various techniques including FT-IR, XRD, TGA, FE-SEM, and TEM techniques. The maximum uptake capacities of Ca-Fe/LDH-Cit were 2.26 mg/g for Ni(II) and 61.73 mg/g for Pb(II) inferred from the Langmuir model at the contact time of 30 min and pH of 7. Based on the results, the adsorption and kinetic isotherms were in good agreement with the Langmuir model and the pseudo-second-order equation, respectively. The results suggested that the composite adsorbent has the good ability to remove the Ni2+ and Pb2+ ions from aqueous solutions. The results reveal that the composite adsorbent can be considered as a high-capacity absorbent for Ni(II) and Pb(II) removal and also as a potential candidate for practical applications.
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Affiliation(s)
- Omid Rahmanian
- Department of Environmental Health, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Mohammad Dinari
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Sima Neamati
- Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran
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Heidarinejad Z, Rahmanian O, Fazlzadeh M, Heidari M. Enhancement of methylene blue adsorption onto activated carbon prepared from Date Press Cake by low frequency ultrasound. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.05.100] [Citation(s) in RCA: 101] [Impact Index Per Article: 16.8] [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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Jafari K, Heidari M, Rahmanian O. Wastewater treatment for Amoxicillin removal using magnetic adsorbent synthesized by ultrasound process. Ultrason Sonochem 2018; 45:248-256. [PMID: 29705319 DOI: 10.1016/j.ultsonch.2018.03.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2018] [Revised: 02/28/2018] [Accepted: 03/20/2018] [Indexed: 05/28/2023]
Abstract
In this study, the effect of magnetic adsorbent prepared from Olive kernel (MA-OK) was studied in the Amoxicillin (AMX) removal. The synthesized adsorbent, under a sonochemical method, were characterized using Field emission scanning electron microscope (FESEM), Fourier transform infrared spectroscopy (FTIR), Brunauer-Emmett-Teller (BET) and X-ray diffraction (XRD). The absorption functions in the batch experiments were studied using the expected parameters for the maximum absorption capacities (qm) such as pH, contact time, the dosage adsorbent, and the initial concentration of AMX. The residual amount of AMX were recorded after injection into the HPLC. The proportion of the mobile phase was methanol to water (40:60) at a flow rate of 1 ml/min. Adsorption experimental results indicated that the removal efficiency reaches its maximum using 0.5 g/L of the adsorbent, concentration of AMX (200 mg/L) at contact time of 90 min and pH of 6. The kinetics of the reaction and the adsorption isotherm could be well described by the pseudo-second order equation and the Langmuir adsorption isotherm with a regression coefficient of 0.9981 and 0.9979, respectively. The maximum adsorption capacity obtained from the Langmuir model was to be 238.1 mg/g. The ionic strength of the solution has no significant effect on increasing the AMX removal efficiency. Eventually, application of this adsorbent was successfully performed for removing AMX from aqueous and hospital wastewater solutions.
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Affiliation(s)
- Khadijeh Jafari
- Department of Environmental Health, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Mohsen Heidari
- Department of Environmental Health, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Omid Rahmanian
- Department of Environmental Health, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
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Norouzi S, Heidari M, Alipour V, Rahmanian O, Fazlzadeh M, Mohammadi-Moghadam F, Nourmoradi H, Goudarzi B, Dindarloo K. Preparation, characterization and Cr(VI) adsorption evaluation of NaOH-activated carbon produced from Date Press Cake; an agro-industrial waste. Bioresour Technol 2018; 258:48-56. [PMID: 29522925 DOI: 10.1016/j.biortech.2018.02.106] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 02/19/2018] [Accepted: 02/22/2018] [Indexed: 05/24/2023]
Abstract
Date Press Cake (DPC) is an inevitable by-product of date processing industries and may pose environmental problems if not managed properly. In this study, DPC was converted into activated carbon using solid NaOH under various activation conditions. The prepared activated carbon showed high specific surface area (2025.9 m2 g-1) and microporous texture (86.01%). It was successfully applied for the adsorption of Cr(VI) from aqueous solutions with maximum monolayer adsorption capacities as high as 282.8 mg g-1 (pH = 2) and 198.0 mg g-1 (pH = 5). The kinetic and isotherm experimental data of Cr(VI) adsorption onto the activated carbon were best described by Elovich and Redlich-Peterson models, respectively. It was found that the Cr(VI) adsorption onto the DPC-derived activated carbon was predominantly a chemisorption process with limited desorption rates (below 50%). Overall, Date Press Cake could be considered as an abundant and renewable agro-industrial precursor for the production of high quality activated carbon.
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Affiliation(s)
- Samira Norouzi
- Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Mohsen Heidari
- Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran.
| | - Vali Alipour
- Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Omid Rahmanian
- Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Mehdi Fazlzadeh
- Social Determinants of Health Research Center, Department of Environmental Health Engineering, School of Health, Ardabil University of Medical Sciences, Ardabil, Iran; Department of Environmental Health Engineering, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - Fazel Mohammadi-Moghadam
- Department of Environmental Health Engineering, Faculty of Health, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Heshmatollah Nourmoradi
- Department of Environmental Health Engineering, Faculty of Health, Ilam University of Medical Sciences, Ilam, Iran; Biotechnology and Medical Plants Research Center, Ilam University of Medical Sciences, Ilam, Iran
| | - Babak Goudarzi
- Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
| | - Kavoos Dindarloo
- Department of Environmental Health Engineering, Faculty of Health, Hormozgan University of Medical Sciences, Bandar Abbas, Iran
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Rahmanian O, Amini S, Dinari M. Preparation of zinc/iron layered double hydroxide intercalated by citrate anion for capturing Lead (II) from aqueous solution. J Mol Liq 2018. [DOI: 10.1016/j.molliq.2018.02.018] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Abstract
A unique technique for the rapid fabrication of thermoplastic microfluidic chips is described. The method enables the realization of fully-sealed microchannels in around one hour while requiring only minimal infrastructure by taking advantage of a solvent swelling mechanism that allows raised features to be patterned on the surface of homogeneous thermoplastic materials. Patterning is achieved without photolithography by simply drawing the desired microchannel pattern onto the polymer surface using a suitable ink as a masking layer, either manually or under robotic control, followed by timed exposure to solvent vapor to yield a desired depth for the masked channel features. The channels are then permanently sealed through solvent bonding of the microchannel chip to a mating thermoplastic substrate. The process is demonstrated using cyclic olefin copolymer as a thermoplastic material, with fully operational microfluidic devices fabricated following a true desktop manufacturing model suitable for rapid prototyping.
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Affiliation(s)
- Omid Rahmanian
- Department of Bioengineering, University of Maryland, College Park MD 20742, USA
| | - Don L. DeVoe
- Department of Bioengineering, University of Maryland, College Park MD 20742, USA
- Department of Mechanical Engineering, University of Maryland, College Park MD 20742, USA
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Rezaei B, Rahmanian O, Ensafi AA. Sensing Lorazepam with a glassy carbon electrode coated with an electropolymerized-imprinted polymer modified with multiwalled carbon nanotubes and gold nanoparticles. Mikrochim Acta 2012. [DOI: 10.1007/s00604-012-0897-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Abstract
A new method for the fabrication of microscale features in thermoplastic substrates is presented. Unlike traditional thermoplastic microfabrication techniques, in which bulk polymer is displaced from the substrate by machining or embossing, a unique process termed orogenic microfabrication has been developed in which selected regions of a thermoplastic surface are raised from the substrate by an irreversible solvent swelling mechanism. The orogenic technique allows thermoplastic surfaces to be patterned using a variety of masking methods, resulting in three-dimensional features that would be difficult to achieve through traditional microfabrication methods. Using cyclic olefin copolymer as a model thermoplastic material, several variations of this process are described to realize growth heights ranging from several nanometers to tens of micrometers, with patterning techniques include direct photoresist masking, patterned UV/ozone surface passivation, elastomeric stamping, and noncontact spotting. Orogenic microfabrication is also demonstrated by direct inkjet printing as a facile photolithography-free masking method for rapid desktop thermoplastic microfabrication.
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Affiliation(s)
- Omid Rahmanian
- Department of Bioengineering, University of Maryland, College Park, MD 20742
| | - Chien-Fu Chen
- Department of Bioengineering, University of Maryland, College Park, MD 20742
- Graduate Institute of Biomedical Engineering, National Chung Hsing University, Taiwan
| | - Don L. DeVoe
- Department of Bioengineering, University of Maryland, College Park, MD 20742
- Department of Mechanical Engineering, University of Maryland, College Park, MD 20742
- Corresponding author
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Rezaei B, Rahmanian O. Direct nanolayer preparation of molecularly imprinted polymers immobilized on multiwalled carbon nanotubes as a surface-recognition sites and their characterization. J Appl Polym Sci 2011. [DOI: 10.1002/app.35383] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
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Rezaei B, Mallakpour S, Rahmanian O. Application of molecularly imprinted polymer for solid phase extraction and preconcentration of Hydrochlorothiazide in pharmaceutical and serum sample analysis. JICS 2010. [DOI: 10.1007/bf03246097] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Rezaei B, Mallakpour S, Rahmanian O. A Selective Solid-Phase Extraction and Preconcentration Method with Using Molecularly Imprinted Polymer for Piroxicam in Pharmaceutical Sample. ANAL LETT 2008. [DOI: 10.1080/00032710802162129] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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