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Kamyab S, Ramezani A, Nematollahi M, Henneaux P, Labeau P. Assessment of the grid-related loss of offsite power to the nuclear power plants in the presence of wind farms. Progress in Nuclear Energy 2023. [DOI: 10.1016/j.pnucene.2022.104508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Khonsha B, Jahanfarnia G, Sepanloo K, Nematollahi M, Khonsha I. ANSYS-CFX simulation of the SRBTL test loop core with nanofluid coolant. KERNTECHNIK 2021. [DOI: 10.1515/kern-2020-0059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
In the present study, CFD calculations are presented for the three types of water-based nanofluids Al2O3/water, CuO/water and TiO2/water with 0.1% volume fraction. These calculations are done with ANSYS-CFX and as geometry the SRBTL test loop as scaled down test loop for a VVER-1000 reactor core design is used. The goal of this study is to evaluate the CFD program against the SRBTL test loop core as a scaled core for applying water-based nanofluids as coolant. ANSYS-CFX simulation data are validated against the RELAP5/MOD3.2 simulation data for pure water. This comparison shows a good agreement. The simulation results for the nanofluids and water including Re number, temperature, viscosity, pressure drop and heat transfer coefficient through the SRBTL test loop core are compared. The results of the comparisons show that the SRBTL test loop core is suitable to extract experimental data of water-based nanofluids for using them as coolant in the VVER-1000 reactor.
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Affiliation(s)
- B. Khonsha
- Department of Nuclear Engineering Science and Research Branch Islamic Azad University Tehran Iran
| | - G. Jahanfarnia
- Department of Nuclear Engineering Science and Research Branch Islamic Azad University Tehran Iran
| | - K. Sepanloo
- Nuclear Science and Technology Research Institute Atomic Energy Organization of Iran Tehran Iran
| | - M. Nematollahi
- School of Mechanical Engineering Shiraz University Shiraz Iran
| | - I. Khonsha
- Department of Chemical Engineering Islamic Azad University Shiraz Iran
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Abbas MA, Jahromi KE, Nematollahi M, Krebbers R, Liu N, Woyessa G, Bang O, Huot L, Harren FJM, Khodabakhsh A. Fourier transform spectrometer based on high-repetition-rate mid-infrared supercontinuum sources for trace gas detection. Opt Express 2021; 29:22315-22330. [PMID: 34265999 DOI: 10.1364/oe.425995] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Accepted: 05/14/2021] [Indexed: 06/13/2023]
Abstract
We present a fast-scanning Fourier transform spectrometer (FTS) in combination with high-repetition-rate mid-infrared supercontinuum sources, covering a wavelength range of 2-10.5 µm. We demonstrate the performance of the spectrometer for trace gas detection and compare various detection methods: baseband detection with a single photodetector, baseband balanced detection, and synchronous demodulation at the repetition rate of the supercontinuum source. The FTS uses off-the-shelf optical components and provides a minimum spectral resolution of 750 MHz. It achieves a noise equivalent absorption sensitivity of ∼10-6 cm-1 Hz-1/2 per spectral element, by using a 31.2 m multipass absorption cell.
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Biffi CA, Bassani P, Nematollahi M, Shayesteh Moghaddam N, Amerinatanzi A, Mahtabi MJ, Elahinia M, Tuissi A. Effect of Ultrasonic Nanocrystal Surface Modification on the Microstructure and Martensitic Transformation of Selective Laser Melted Nitinol. Materials (Basel) 2019; 12:ma12193068. [PMID: 31547164 PMCID: PMC6804132 DOI: 10.3390/ma12193068] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/24/2019] [Revised: 09/09/2019] [Accepted: 09/10/2019] [Indexed: 12/01/2022]
Abstract
Nitinol has significant potential for biomedical and actuating-sensing devices, thanks to its functional properties. The use of selective laser melting (SLM) with Nitinol powder can promote novel applications aimed to produce 3D complex parts with integrated functional performances. As the final step of the production route, finishing processing needs to be investigated both for the optimization of the surface morphology and the limit alteration of the Nitinol functional properties. In this work, the effect of an advanced method of surface modification, ultrasonic nanocrystal surface modification (UNSM), on the martensitic transformation and microstructure of SLM built Ni50.8Ti49.2 (at.%) was investigated. Scanning electron microscopy, X-ray diffraction, and differential scanning calorimetry indicated that the UNSM process can generate stress-induced martensite, at least partially suppressing the martensitic transformation. The microhardness profile indicates that the UNSM process can affect the mechanical properties of the SLMed Nitinol sample in a range of up to approximately 750 μm in depth from the upper surface, while electron backscatter diffraction analysis highlighted that the initial austenitic phase was modified within a depth below 200 μm from the UNSMed surface.
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Affiliation(s)
- C A Biffi
- National Research Council; Institute of Condensed Matter Chemistry and Technologies for Energy, CNR ICMATE, Unit of Lecco, Via Previati 1E, 23900 Lecco, Italy.
| | - P Bassani
- National Research Council; Institute of Condensed Matter Chemistry and Technologies for Energy, CNR ICMATE, Unit of Lecco, Via Previati 1E, 23900 Lecco, Italy.
| | - M Nematollahi
- Dynamic and Smart Systems Laboratory, Mechanical Industrial and Manufacturing Engineering Department, The University of Toledo, Toledo, OH 43606, USA.
| | - N Shayesteh Moghaddam
- Mechanical and Aerospace Engineering, University of Texas at Arlington, Arlington, TX 76019, USA.
| | - A Amerinatanzi
- Mechanical and Aerospace Engineering, University of Texas at Arlington, Arlington, TX 76019, USA.
| | - M J Mahtabi
- Department of Mechanical Engineering, University of Tennessee at Chattanooga, Chattanooga, TN 37403, USA.
| | - M Elahinia
- Dynamic and Smart Systems Laboratory, Mechanical Industrial and Manufacturing Engineering Department, The University of Toledo, Toledo, OH 43606, USA.
| | - A Tuissi
- National Research Council; Institute of Condensed Matter Chemistry and Technologies for Energy, CNR ICMATE, Unit of Lecco, Via Previati 1E, 23900 Lecco, Italy.
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Nematollahi M. MTE12.02 How can we Minimize Toxicity for our High Risk Patients? J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.067] [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: 10/28/2022]
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Inzani K, Nematollahi M, Vullum-Bruer F, Grande T, Reenaas TW, Selbach SM. Electronic properties of reduced molybdenum oxides. Phys Chem Chem Phys 2018; 19:9232-9245. [PMID: 28321441 DOI: 10.1039/c7cp00644f] [Citation(s) in RCA: 138] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
The electronic properties of MoO3 and reduced molybdenum oxide phases are studied by density functional theory (DFT) alongside characterization of mixed phase MoOx films. Molybdenum oxide is utilized in compositions ranging from MoO3 to MoO2 with several intermediary phases. With increasing degree of reduction, the lattice collapses and the layered MoO3 structure is lost. This affects the electronic and optical properties, which range from the wide band gap semiconductor MoO3 to metallic MoO2. DFT is used to determine the stability of the most relevant molybdenum oxide phases, in comparison to oxygen vacancies in the layered MoO3 lattice. The non-layered phases are more stable than the layered MoO3 structure for all oxygen stoichiometries of MoOx studied where 2 ≤ x < 3. Reduction and lattice collapse leads to strong changes in the electronic density of states, especially the filling of the Mo 4d states. The DFT predictions are compared to experimental studies of molybdenum oxide films within the same range of oxygen stoichiometries. We find that whilst MoO2 is easily distinguished from MoO3, intermediate phases and phase mixtures have similar electronic structures. The effect of the different band structures is seen in the electrical conductivity and optical transmittance of the films. Insight into the oxide phase stability ranges and mixtures is not only important for understanding molybdenum oxide films for optoelectronic applications, but is also relevant to other transition metal oxides, such as WO3, which exist in analogous forms.
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Affiliation(s)
- K Inzani
- Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
| | - M Nematollahi
- Department of Physics, NTNU Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - F Vullum-Bruer
- Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
| | - T Grande
- Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
| | - T W Reenaas
- Department of Physics, NTNU Norwegian University of Science and Technology, N-7491 Trondheim, Norway
| | - S M Selbach
- Department of Materials Science and Engineering, NTNU Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
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Kianoush F, Nematollahi M, Waterfield JD, Brunette DM. Regulation of RAW264.7 macrophage polarization on smooth and rough surface topographies by galectin-3. J Biomed Mater Res A 2017; 105:2499-2509. [PMID: 28498622 DOI: 10.1002/jbm.a.36107] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 05/04/2017] [Accepted: 05/08/2017] [Indexed: 11/05/2022]
Abstract
Recognition of topographical features induces phenotypic changes in macrophages although the receptors and signaling pathways are not completely characterized. As integrin molecules in focal adhesions/podosomes are in intimate contact with topography and topography modulates the NFkB pathway through cholesterol enriched raft-associated adhesive signaling structures we hypothesized that a cell-surface signaling complex comprised of galectin-3 together with its ligand CD98 and integrinβ1 is important for topography-directed lineage determination. This study used polished, sand blasted and acid etched (SLA) surfaces and two novel grooved topographies (G1 and G2) produced by anisotropic etching of Si <1 1 0> to evaluate the role of galectin-3 in macrophage polarization in RAW 264.7 macrophages, as determined by gene expression and morphology. In the presence of the galectin-3 inhibitor, lactose, the M2 marker (mannose receptor) was down-regulated while the M1 marker (iNOS) was up-regulated on smooth and rough surfaces. This skewing of phenotype suggests a role for galectin-3 in macrophage polarization towards the M2 phenotype. Additionally, we evaluated the role of PI3K on polarization using PI3K inhibitor LY294002. We found that the M2 marker was down-regulated on both PO (surface polished) and G1 surfaces implicating PI3K in lineage determination. We also found that surface topography altered cell morphology; macrophages had a larger area on G2 surfaces. Lactose treatment significantly reduced the cell area on all topographies suggesting that the galectin-3 is also involved in signaling complexes triggering the rearrangement of the actin cytoskeleton. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 105A: 2499-2509, 2017.
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Affiliation(s)
- F Kianoush
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - M Nematollahi
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - J D Waterfield
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
| | - D M Brunette
- Department of Oral Biological and Medical Sciences, Faculty of Dentistry, University of British Columbia, Vancouver, British Columbia, Canada
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Nematollahi M, Faghiri K, Barati O, Bastani P. Smart Phone Acceptance among Physicians: Application of Structural Equation Modelling in the Largest Iranian University. J Biomed Phys Eng 2017; 7:87-94. [PMID: 28451582 PMCID: PMC5401137] [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: 01/05/2016] [Accepted: 04/15/2016] [Indexed: 10/25/2022]
Abstract
BACKGROUND The present study aimed to determine attitudes and effective factors in the acceptance of smart phones by physicians of the largest University of Medical Sciences in the south of Iran. METHODS This cross-sectional study was performed using Structural Equation Modelling (SEM) in 2014. Study participants included 200 physicians working in the hospitals of Shiraz University of Medical Sciences selected through two-stage stratified sampling, but 185 participants completed the study. The study data were collected using a researcher-made questionnaire completed through a 5-point Likert scale. The content validity of the questionnaire was confirmed by a panel of experts, its construct validity by confirmatory factor analysis, and its reliability by Cronbach's alpha of 0.802. All data analyses were performed using SPSS (version 22) and LISREL (version 8.8). RESULTS Results showed that most physicians had a desirable attitude towards using smart phones. Besides, the results of SEM indicated a significant relationship between attitude and compatibility, observability, personal experience, voluntariness of use and perceived usefulness. Moreover, some important fitness indices revealed appropriate fitness of the study model (p=0.26, X2/df=1.35, RMR=0.070, GFI=0.77, AGFI=0.71, NNFI=0.93, CFI=0.94). CONCLUSION The results revealed that compatibility, observability, personal experience, voluntariness of use and perceived usefulness were effective in the physicians' attitude towards using smart phones. Thus, by preparation of the required infrastructures, policymakers in the field of health technology can enhance the utilization of smart phones in hospitals.
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Affiliation(s)
- M. Nematollahi
- Anesthesiology and Critical Care Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
,Department of Health Information Management and Technology, School of Management and Medical Informatics, Shiraz University of Medical Sciences, Shiraz, Iran
| | - K. Faghiri
- Department of Health Information Management and Technology, School of Management and Medical Informatics, Shiraz University of Medical Sciences, Shiraz, Iran
| | - O. Barati
- Assistant Professor, Department of Health Service Management, School of Management and Medical Informatics, Shiraz University of Medical Sciences, Shiraz, Iran
| | - P. Bastani
- Assistant Professor, Department of Health Service Management, School of Management and Medical Informatics, Shiraz University of Medical Sciences, Shiraz, Iran
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Nematollahi M, Akbari R, Nikeghbalian S, Salehnasab C. Classification Models to Predict Survival of Kidney Transplant Recipients Using Two Intelligent Techniques of Data Mining and Logistic Regression. Int J Organ Transplant Med 2017; 8:119-122. [PMID: 28959387 PMCID: PMC5611541] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Kidney transplantation is the treatment of choice for patients with end-stage renal disease (ESRD). Prediction of the transplant survival is of paramount importance. The objective of this study was to develop a model for predicting survival in kidney transplant recipients. In a cross-sectional study, 717 patients with ESRD admitted to Nemazee Hospital during 2008-2012 for renal transplantation were studied and the transplant survival was predicted for 5 years. The multilayer perceptron of artificial neural networks (MLP-ANN), logistic regression (LR), Support Vector Machine (SVM), and evaluation tools were used to verify the determinant models of the predictions and determine the independent predictors. The accuracy, area under curve (AUC), sensitivity, and specificity of SVM, MLP-ANN, and LR models were 90.4%, 86.5%, 98.2%, and 49.6%; 85.9%, 76.9%, 97.3%, and 26.1%; and 84.7%, 77.4%, 97.5%, and 17.4%, respectively. Meanwhile, the independent predictors were discharge time creatinine level, recipient age, donor age, donor blood group, cause of ESRD, recipient hypertension after transplantation, and duration of dialysis before transplantation. SVM and MLP-ANN models could efficiently be used for determining survival prediction in kidney transplant recipients.
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Affiliation(s)
- M. Nematollahi
- Anesthesiology and Critical Care Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - R. Akbari
- School of Computer Engineering & IT, Shiraz University of Technology, Shiraz, Iran
| | - S. Nikeghbalian
- School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - C. Salehnasab
- Shiraz University of Medical Sciences, Shiraz, Iran,Correspondence: Cirruse Salehnasab, Shiraz University of Medical Sciences, Shiraz, Iran, E-mail:
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Esmaeili M, Ghaedi K, Shoaraye Nejati A, Nematollahi M, Shiralyian H, Nasr-Esfahani MH. Pioglitazone significantly prevented decreased rate of neural differentiation of mouse embryonic stem cells which was reduced by Pex11β knock-down. Neuroscience 2015; 312:35-47. [PMID: 26562432 DOI: 10.1016/j.neuroscience.2015.11.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 05/13/2015] [Revised: 11/03/2015] [Accepted: 11/03/2015] [Indexed: 12/12/2022]
Abstract
Peroxisomes constitute special cellular organelles which display a variety of metabolic functions including fatty acid oxidation and free radical elimination. Abundance of these flexible organelles varies in response to different environmental stimuli. It has been demonstrated that PEX11β, a peroxisomal membrane elongation factor, is involved in the regulation of size, shape and number of peroxisomes. To investigate the role of PEX11β in neural differentiation of mouse embryonic stem cells (mESCs), we generated a stably transduced mESCs line that derives the expression of a short hairpin RNA against Pex11β gene following doxycycline (Dox) induction. Knock-down of Pex11β, during neural differentiation, significantly reduced the expression of neural progenitor cells and mature neuronal markers (p<0.05) indicating that decreased expression of PEX11β suppresses neuronal maturation. Additionally, mRNA levels of other peroxisome-related genes such as PMP70, Pex11α, Catalase, Pex19 and Pex5 were also significantly reduced by Pex11β knock-down (p<0.05). Interestingly, pretreatment of transduced mESCs with peroxisome proliferator-activated receptor γ agonist (pioglitazone (Pio)) ameliorated the inhibitory effects of Pex11β knock down on neural differentiation. Pio also significantly (p<0.05) increased the expression of neural progenitor and mature neuronal markers besides the expression of peroxisomal genes in transduced mESC. Results elucidated the importance of Pex11β expression in neural differentiation of mESCs, thereby highlighting the essential role of peroxisomes in mammalian neural differentiation. The observation that Pio recovered peroxisomal function and improved neural differentiation of Pex11β knocked-down mESCs, proposes a potential new pharmacological implication of Pio for neurogenesis in patients with peroxisomal defects.
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Affiliation(s)
- M Esmaeili
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - K Ghaedi
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran; Division of Cellular and Molecular Biology, Department of Biology, Faculty of Sciences, University of Isfahan, Isfahan, Iran.
| | - A Shoaraye Nejati
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - M Nematollahi
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - H Shiralyian
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - M H Nasr-Esfahani
- Department of Cellular Biotechnology, Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.
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Hosseini Farahabadi SS, Ghaedi K, Ghazvini Zadegan F, Karbalaie K, Rabiee F, Nematollahi M, Baharvand H, Nasr-Esfahani MH. ERK1/2 is a key regulator of Fndc5 and PGC1α expression during neural differentiation of mESCs. Neuroscience 2015; 297:252-61. [PMID: 25869623 DOI: 10.1016/j.neuroscience.2015.03.069] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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: 09/10/2014] [Revised: 03/24/2015] [Accepted: 03/29/2015] [Indexed: 12/31/2022]
Abstract
Fibronectin type III domain containing 5 (Fndc5) has already been distinguished to be involved in neural differentiation. However, cellular events of Fndc5 function are still ambiguous in the nervous system. One approach to shed light on duty of this protein in the nervous system is to find its cross-talks with various signaling pathways with defined characteristics and roles. Identification of the underlying molecular mechanism which controls Fndc5 expression and switches its activity up and down enables us to find out the Fndc5 functional map in the nervous system and other human body systems. Retinoic acid (RA) is a bio-small molecule which exerts its role as a neural inducer in the neurodevelopmental process of neural tube. RA up-regulates the expression of various genes involved in neural differentiation process via two distinct pathways: the genomic and the non-genomic. Our previous study has revealed that RA induces Fndc5 expression during neural differentiation process. In this study we have evaluated our hypothesis about the non-genomic up regulation of Fndc5 expression by RA. Interestingly we have identified that there is an association between ERK signaling pathway and Fndc5 expression. Furthermore, inhibition of this pathway by PD0325901 dramatically reduced Fndc5 mRNA level, while activating the pathway up-regulated Fndc5 transcription. In addition, it has been proven that ERK1/2 modulation via RA has more significant controlling effect on Fndc5 promoter rather than bFGF. This led us to conclude that RA enhances Fndc5 expression through a non-genomic pathway via the ERK signaling pathway.
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Affiliation(s)
- S S Hosseini Farahabadi
- Cell and Molecular Biology Division, Biology Department, School of Sciences, University of Isfahan, Isfahan, Iran
| | - K Ghaedi
- Cell and Molecular Biology Division, Biology Department, School of Sciences, University of Isfahan, Isfahan, Iran; Department of Cellular Biotechnology at Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.
| | - F Ghazvini Zadegan
- Department of Cellular Biotechnology at Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - K Karbalaie
- Department of Cellular Biotechnology at Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - F Rabiee
- Department of Cellular Biotechnology at Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - M Nematollahi
- Department of Cellular Biotechnology at Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran
| | - H Baharvand
- Department of Stem Cells and Developmental Biology at Cell Science Research Center, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, Iran; Department of Developmental Biology, University of Science and Culture, ACECR, Tehran, Iran
| | - M-H Nasr-Esfahani
- Department of Cellular Biotechnology at Cell Science Research Center, Royan Institute for Biotechnology, ACECR, Isfahan, Iran.
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Nematollahi M. 184 Dermatologic toxicities associated with targeted therapies: nursing implications associated with targeted therapies. Eur J Oncol Nurs 2014. [DOI: 10.1016/s1462-3889(14)70201-7] [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: 11/28/2022]
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Nematollahi M. 109 Role of oncology nurses in the era of oral cancer treatments in patients with NSCLC – are we ready? Eur J Oncol Nurs 2014. [DOI: 10.1016/s1462-3889(14)70128-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Nematollahi M, Khalesi N, Moghaddasi H, Askarian M. Second Generation of HIV Surveillance System: A Pattern for Iran. Iran Red Crescent Med J 2012; 14:309-12. [PMID: 22829992 PMCID: PMC3398640] [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] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Accepted: 01/30/2012] [Indexed: 12/03/2022]
Abstract
BACKGROUND For the purpose of minimizing the HIV/AIDS epidemic effects, one of the programs is the promotion of scientific methods and setting of the suitable surveillance systems. The present research was conducted to design the HIV/AIDS surveillance system in Iran applying WHO recommendations and the experience of some countries. METHODS In 2009, based on the country's requirements, the HIV/AIDS surveillance system was proposed and designed for Iran. The Delphi technique was utilized to find the views of experts. Data analysis was conducted based on a comparison of the attributes of the HIV/AIDS surveillance systems in the countries under consideration using a descriptive and theoretical analysis. RESULTS The model was approved obtaining the final score of 36.3 out of 44, viz 82.5%. CONCLUSION Designing and performing of the HIV/AIDS surveillance pattern in the direction of "second generation of HIV/AIDS surveillance" can be considered as an important step in the improvement of the patient's control and precaution of HIV/AIDS.
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Affiliation(s)
- M Nematollahi
- Department of Health Information Management, Shiraz University of Medical Sciences, Shiraz, Iran,Correspondence: Mohtaram Nematollahi, PhD, School of Management and Medical Information Sciences, Shiraz University of Medical Sciences, Shiraz, Iran. Tel.: +98-917-3182892, E-mail:
| | - N Khalesi
- Department of Health Services management, Iran University of Medical Sciences, Tehran, Iran
| | - H Moghaddasi
- Department of Health Information Management, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - M Askarian
- Department of Community Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
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Abtahi S, Sadraei H, Nematollahi M, Karbalaie K, Karamali F, Salamian A, Baharvand H, Nasr-Esfahani MH. Functional expression of potassium channels in cardiomyocytes derived from embryonic stem cells. Res Pharm Sci 2012. [PMID: 23181074 PMCID: PMC3500552] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Royan B(1) stem cell can be differentiated to specialized cell types including cardiomyocytes. This developmental change is accompanied with expression of various K(+) channel types. The aim of this study was to detect functional expression of K(+) currents from stem cell stage and one week and two weeks after differentiation into cardiomyocyte. Mouse stem cell derived cardiomyocytes (ES-cardiomyocytes) were isolated to single cell suspension for K(+) current recording using whole cell patch-clamp technique. The predominant depolarizing current in ES-cardiomyocytes was a tetraethylammonium (TEA) (10 mM) sensitive current which was partially blocked by nifedipine (1 μM) and attenuated by increasing concentration of EGTA (10 mM) in the pipette solution. Pharmacology and electrophysiological properties of this oscillatory sustained current very well matched with characteristics of Ca(2+) activated K(+) current. In addition there was another kind of sustained outward K(+) current which was resistance to TEA but was inhibited by 3,4-diaminopyridine. The characteristic features of this current indicate that this current was due to activation of delayed rectifier K(+) channels. RT-PCR study also confirmed expression of these two types of K(+) channels in ES-cardiomyocytes. Therefore, present study shows functional expression of two types of K(+) ionic current in ES-cardiomyocytes.
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Affiliation(s)
- S.R. Abtahi
- Department of Pharmacology and Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R.Iran,Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - H. Sadraei
- Department of Pharmacology and Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R.Iran,Corresponding authors:
Dr. H. Sadraei, , Tel. 0098 311 7922608, Fax. 0098 311 6680011
Dr. M.H. Nasr-Esfahani, , Tel. 0098 311 2612900-3, Fax. 0098 311 2605525
| | - M. Nematollahi
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - K. Karbalaie
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - F. Karamali
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - A. Salamian
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - H. Baharvand
- Department of Stem Cells and Developmental Biology, Royan Institute for Stem Cell Biology and Technology, ACECR, Tehran, I.R.Iran,Department of Developmental Biology, University of Science and Culture, ACECR, Tehran, I.R.Iran
| | - M. H. Nasr-Esfahani
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran,Corresponding authors:
Dr. H. Sadraei, , Tel. 0098 311 7922608, Fax. 0098 311 6680011
Dr. M.H. Nasr-Esfahani, , Tel. 0098 311 2612900-3, Fax. 0098 311 2605525
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Nematollahi M, Rezaiean M. Experimental Evaluation of Natural Circulation Pressure Drop in a Boiling Channel. Fusion Science and Technology 2012. [DOI: 10.13182/fst12-a13416] [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: 11/12/2022]
Affiliation(s)
- M. Nematollahi
- School of Mechanical Engineering, Shiraz University 71348-51154, Shiraz, IRAN ,
| | - M. Rezaiean
- School of Mechanical Engineering, Shiraz University 71348-51154, Shiraz, IRAN ,
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17
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Nematollahi M, Mazhari M. Quantitative Evaluation of Heat Transfer in Bubble Collapse Process in Subcooled Flow Boiling. Fusion Science and Technology 2012. [DOI: 10.13182/fst12-a13418] [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: 11/12/2022]
Affiliation(s)
- M. Nematollahi
- School of Mechanical Engineering, Shiraz University, Zand Avenue, Shiraz, Fars ,
| | - M. Mazhari
- School of Mechanical Engineering, Shiraz University, Zand Avenue, Shiraz, Fars ,
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18
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Asadi M, Mirvaghefei A, Nematollahi M, Banaee M, Ahmadi A. Effects of Watercress (Nasturtium nasturtium) extract on selected immunological parameters of rainbow trout (Oncorhynchus mykiss). Open Vet J 2012. [DOI: 10.5455/ovj.2012.v2.i0.p32] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Watercress (Nasturtium nasturtium) is a medical plant containing diverse chemically-active substances with biological properties. The present study was conducted to investigate the immunomodulatory effects of watercress extract on immunological and hematological parameters of rainbow trout (Oncorhynchus mykiss). Fish were fed for 21 days with diet supplemented with 0.1% and 1% of watercress extract per 1 kg food and with a normal diet as control. Hematological parameters such as red blood cells (RBC) and white blood cells (WBC), hematocrit (Hct), hemoglobin (Hb), RBC index like mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH) and mean corpuscular hemoglobin concentration (MCHC) as well as immunological parameters such as peroxidase, lysozyme and complement activities, total protein, albumin and globulin levels were measured after 21 days of watercress extract treatment. The results indicated that oral administration of 1 % watercress extract in fish may enhance some hematological and immunological parameters including Hb and MCHC, lysozyme and complement activities, total protein and globulin levels, compared to the controls after 21 days of experimental period. In conclusion, on the basis of these results, oral administration of watercress extract may be useful to improve fish’s immune system.
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Shahoon H, Esmaeili M, Mobedi I, Nematollahi M. Multi vesicular osseous hydatid disease of the mandible- a case report. Iran J Parasitol 2010; 5:55-60. [PMID: 22347236 PMCID: PMC3279826] [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] [Subscribe] [Scholar Register] [Received: 09/21/2009] [Accepted: 01/11/2010] [Indexed: 12/03/2022]
Abstract
Hydatid disease is a common and major public health issue caused by parasite Echinococcus granulosus. The highest prevalence of the parasite can be found in different parts of world like Africa, Australia, and South America. This infection can occurs in almost any part of the body. Here we present clinical, radiological, histological features and treatment of a multi vesicular osseous hydatid disease of the mandible in an Afghan 5 year old boy with a firm swelling in the right side of mandible.
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Affiliation(s)
- H Shahoon
- Department of Oral and Maxillofacial Surgery, Dental School of Shahed University, Tehran, Iran
| | - M Esmaeili
- Department of Oral Medicine and Diagnostic Science, Dental School of Shahed University, Tehran, Iran,Corresponding author: ; Tel: 02188954249
| | - I Mobedi
- Department of Medical Parasitology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
| | - M Nematollahi
- Private Practice, No.165, Mostofi Street, Yousef abad, Tehran, Iran
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20
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Nematollahi M, Hamilton DW, Jaeger NJ, Brunette DM. Hexagonal micron scale pillars influence epithelial cell adhesion, morphology, proliferation, migration, and cytoskeletal arrangement. J Biomed Mater Res A 2009; 91:149-57. [PMID: 18773428 DOI: 10.1002/jbm.a.32202] [Citation(s) in RCA: 20] [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: 11/06/2022]
Abstract
A desirable attribute of implants penetrating epithelium is the inhibition of downward epithelial migration. Simple grooved topographies can inhibit this migration either directly or indirectly by promoting connective tissue attachment, but few studies have focused on the direct effect of geometrically complex topographies on epithelial behavior. Therefore, we examined the influence of novel topographies comprising square floors surrounded by six-sided pillars on periodontal ligament epithelial cell adhesion, morphology, cytoskeletal organization, and migration. Relative to cells on smooth surface, epithelial cells on the pillar substrata adhered closely, exhibited reduced proliferation, had a reduced velocity, but higher persistence. Vinculin staining demonstrated that cells formed mature adhesions on the pillar tops, but smaller punctate adhesion in the gaps and on the pillar walls. Overall more mature adhesions were found on pillars compared to smooth surfaces, which may account for the reduced speed of migration limited on the pillars. F-actin stress fibers were predominantly found on pillar tops within 6 h, whereas microtubules (MTs) had a tendency to form in the gaps between the six-sided pillars. In conclusion, microfabricated pillars altered epithelial migration in ways that could prove useful in inhibition of epithelial downward migration on transmucosal implants.
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Affiliation(s)
- M Nematollahi
- Department of Oral, Biological, and Medical Sciences, University of British Columbia, 2199 Wesbrook Mall, Vancouver, BC V6T1Z3, Canada
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21
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Sadraei H, Abtahi S, Nematollahi M, Karbalaie K, Karamali F, Baharvand H, Nasr-Esfahani M. Assessment of potassium current in Royan B(1) stem cell derived cardiomyocytes by patch-clamp technique. Res Pharm Sci 2009; 4:85-97. [PMID: 21589803 PMCID: PMC3093634] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Embryonic stem cells are capable of differentiating to variety of cell tissues including cardiomyocytes. This developmental change is accompanied with a great deal of ion channel expression and functions. Mouse stem cell derived cardiomyocytes were prepared and separated to yield isolated single cell suspension for cell current recording. In the present study some properties of the K(+)-current in Royan B(1) stem cell derived cardiomyocytes were investigated using whole cell patch-clamp technique. When the holding potential was - 60 mV, in some cells a major outward current was elicited by square depolarizing pulses from -60 mV to +50 mV. This outward current was sustained for the duration of 300 ms test pulse. The sustained outward K(+) current was inhibited by tetraethylammonium (10 mM) indicating the activity of Ca(2+) activated K(+) channel in these cells. In some of the cells with 0.2 mM 3,ethylene glycol-bis (β-aminoethyl ether) N,N,N(`),N(`)-tetraacetic acid in the pipette, only a very small outward current was recorded which suggests that in these cells the voltage activated K(+) channels is either absent or if existed it is not fully functional. Other cells were in far between, indicating that voltage activated K(+) channels are developing in these cells but it is not yet fully functional. In conclusion, we have identified functional large conductance Ca(2+) activated K(+) channel in Royan B(1) stem cell derived cardiomyocytes.
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Affiliation(s)
- H. Sadraei
- Department of Pharmacology & Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R.Iran
| | - S.R. Abtahi
- Department of Pharmacology & Toxicology and Isfahan Pharmaceutical Sciences Research Center, School of Pharmacy and Pharmaceutical Sciences, Isfahan University of Medical Sciences, Isfahan, I.R.Iran
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - M. Nematollahi
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - K. Karbalaie
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - F. Karamali
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - H. Baharvand
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
| | - M.H. Nasr-Esfahani
- Department of Cell and Molecular Biology, Royan Institute for Animal Biotechnology, ACECR, Isfahan, I.R.Iran
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Knox JJ, Chen E, Feld R, Nematollahi M, Pond GR, Cheiken R, Gill S, Zwiebel J, Moore M. A phase II trial of oblimersen sodium (G3139) in combination with doxorubicin (DOX) in advanced hepatocellular carcinoma (HCC). NCI protocol # 5798. J Clin Oncol 2006. [DOI: 10.1200/jco.2006.24.18_suppl.14072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
14072 Background: Advanced HCC is refractory to most standard forms of chemotherapy, however responses to DOX are seen. The bcl-2 protein confers resistance to apoptosis in cancer cells and is important in tumor progression and resistance to chemotherapy. The bcl-2 antisense oligonucleotide, G3139 (G), has been shown to enhance the activity of DOX in tumor models by blocking bcl-2 synthesis. This argues for evaluating G + DOX in combination in HCC. By decreasing tumor bcl-2 protein levels, HCC may be sensitized to the apoptotic effects of DOX. Methods: We completed a phase II trial evaluating treatment with G at 7 mg/ kg for 7 days cont. i.v. infusion (d1–8) plus DOX at 45 mg/m2 i.v. bolus d5, every 28 d (as determined from our phase I HCC study). Eligible patients (pts) had path-confirmed, measurable, advanced HCC. Minimal eligibility included Childs-Pugh A cirrhosis, adequate hematological (hem) parameters and ECOG PS <2. Tumor biopsies for correlative studies were obtained at baseline and cycle 1 d 4 in consenting pts. Results: 19 patients were accrued, 1 was ineligible, 18 evaluable for toxicity, 17 evaluable for response; receiving a median (med) of 2 cycles (range 1,10). Risk for HCC was 39% HBV, 22% HCV, 17% alcohol, 22% other. Most common toxicities were hem and could be attributed to both G+DOX and to G alone. Overall grade 3–4 toxicities seen were: ANC- 67% (med nadir d 24–25), lymphopenia - 44%, thrombocytopenia - 6%, transaminitis - 33% and grade 1–2 G-fever - 67%. No responses were seen and the trial was stopped at stage 1. Six patients (35%) had stable disease, with one pt completing 10 cycles as per protocol (pt # 22). Med TTP is 1.8 months (1.7-NA) and 6-month PFS is 17.2% (5.3–56.4). 18 of 19 pts have died with med OS of only 5.4 months (2.7–11.6). Correlative studies on 3 available pts’ paired tumor biopsies showed absent baseline bcl-2 expression but moderate expression of both bcl-xl and BAX protein and with no change after exposure to G (includes pt #22). Conclusions: G + DOX is inactive in HCC at this dose and schedule. The overlap of hem toxicity may have resulted in suboptimal DOX dosing in HCC. Low baseline bcl-2 tumor expression relative to bcl-xl seen may suggest a relative insensitivity to the effects of bcl-2 inhibition in these HCC tumors. [Table: see text]
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Affiliation(s)
- J. J. Knox
- Princess Margaret Hospital, Toronto, ON, Canada; BC Cancer Agency, Vancouver, BC, Canada; National Cancer Institute, Bethesda, MD
| | - E. Chen
- Princess Margaret Hospital, Toronto, ON, Canada; BC Cancer Agency, Vancouver, BC, Canada; National Cancer Institute, Bethesda, MD
| | - R. Feld
- Princess Margaret Hospital, Toronto, ON, Canada; BC Cancer Agency, Vancouver, BC, Canada; National Cancer Institute, Bethesda, MD
| | - M. Nematollahi
- Princess Margaret Hospital, Toronto, ON, Canada; BC Cancer Agency, Vancouver, BC, Canada; National Cancer Institute, Bethesda, MD
| | - G. R. Pond
- Princess Margaret Hospital, Toronto, ON, Canada; BC Cancer Agency, Vancouver, BC, Canada; National Cancer Institute, Bethesda, MD
| | - R. Cheiken
- Princess Margaret Hospital, Toronto, ON, Canada; BC Cancer Agency, Vancouver, BC, Canada; National Cancer Institute, Bethesda, MD
| | - S. Gill
- Princess Margaret Hospital, Toronto, ON, Canada; BC Cancer Agency, Vancouver, BC, Canada; National Cancer Institute, Bethesda, MD
| | - J. Zwiebel
- Princess Margaret Hospital, Toronto, ON, Canada; BC Cancer Agency, Vancouver, BC, Canada; National Cancer Institute, Bethesda, MD
| | - M. Moore
- Princess Margaret Hospital, Toronto, ON, Canada; BC Cancer Agency, Vancouver, BC, Canada; National Cancer Institute, Bethesda, MD
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Leighl N, Tsao S, Zawisza D, Nematollahi M, Shepherd F. P-331 For richer, for poorer: A willingness-to-pay study of oral epidermal growth factor tyrosine kinase inhibitors in advanced non-small cell lung cancer. Lung Cancer 2005. [DOI: 10.1016/s0169-5002(05)80825-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Knox J, Hedley D, Oza A, Siu L, Feld R, Chen E, Nematollahi M, Pond G, Moore M. 191 Phase II trial of gemcitabine and capecitabine (GemCap) in patients with advanced biliary cancer. EJC Suppl 2003. [DOI: 10.1016/s1359-6349(03)90224-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Wampler DA, Miller-Leiden S, Nazaroff WW, Gadgil AJ, Litvak A, Mahanama KR, Nematollahi M. Effectiveness of smokeless ashtrays. J Air Waste Manag Assoc 1995; 45:494-500. [PMID: 7788509 DOI: 10.1080/10473289.1995.10467380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Abstract
Most environmental tobacco smoke (ETS) issues from the tips of smoldering cigarettes between puffs. Smokeless ashtrays are designed to reduce ETS exposure by removing particulate and/or gas-phase contaminants from this plume. This paper describes an experimental investigation of the effectiveness of four smokeless ashtrays: two commercial devices and two prototypes constructed by the authors. In the basic experimental protocol, one or more cigarettes was permitted to smolder in a room. Particulate or gas-phase pollutant concentrations were measured in the room air over time. Device effectiveness was determined by comparing pollutant concentrations with the device in use to those obtained with no control device. A lung deposition model was applied to further interpret device effectiveness for particle removal. The commercial ashtrays were found to be substantially ineffective in removing ETS particles because of the use of low-quality filter media and/or the failure to draw the smoke through the filter. A prototype ashtray using HEPA filter material achieved better than 90% particle removal efficiency. Gas-phase pollutant removal was tested for only one prototype smokeless ashtray, which employed filters containing activated carbon and activated alumina. Removal efficiencies for the 18 gas-phase compounds measured (above the detection limit) were in the range of 70 to 95%.
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