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Ween MP, Moshensky A, Thredgold L, Bastian NA, Hamon R, Badiei A, Nguyen PT, Herewane K, Jersmann H, Bojanowski CM, Shin J, Reynolds PN, Crotty Alexander LE, Hodge SJ. E-cigarettes and health risks: more to the flavor than just the name. Am J Physiol Lung Cell Mol Physiol 2020; 320:L600-L614. [PMID: 33295836 DOI: 10.1152/ajplung.00370.2020] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The growing interest in regulating flavored E-liquids must incorporate understanding of the "flavoring profile" of each E-liquid-which flavorings (flavoring chemicals) are present and at what concentrations not just focusing on the flavor on the label. We investigated the flavoring profile of 10 different flavored E-liquids. We assessed bronchial epithelial cell viability and apoptosis, phagocytosis of bacteria and apoptotic cells by macrophages after exposure to E-cigarette vapor extract (EVE). We validated our data in normal human bronchial epithelial cells (NHBE) and alveolar macrophages (AM) from healthy donors. We also assessed cytokine release and validated in the saliva from E-cigarette users. Increased necrosis/apoptosis (16.1-64.5% apoptosis) in 16HBE cells was flavor dependent, and NHBEs showed an increased susceptibility to flavors. In THP-1 differentiated macrophages phagocytosis was also flavor dependent, with AM also showing increased susceptibility to flavors. Further, Banana and Chocolate were shown to reduce surface expression of phagocytic target recognition receptors on alveolar macrophages. Banana and Chocolate increased IL-8 secretion by NHBE, whereas all 4 flavors reduced AM IL-1β secretion, which was also reduced in the saliva of E-cigarette users compared with healthy controls. Flavorant profiles of E-liquids varied from simple 2 compound mixtures to complex mixtures containing over a dozen flavorants. E-liquids with high benzene content, complex flavoring profiles, high chemical concentration had the greatest impacts. The Flavorant profile of E-liquids is key to disruption of the airway status quo by increasing bronchial epithelial cell apoptosis, causing alveolar macrophage phagocytic dysfunction, and altering airway cytokines.
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Affiliation(s)
- M P Ween
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,School of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - A Moshensky
- Pulmonary Critical Care Section, Veterans Affairs San Diego Healthcare System, San Diego, California.,Division of Pulmonary, Critical Care and Sleep Medicine, University of California San Diego, La Jolla, California
| | - L Thredgold
- Department of Occupational and Environmental Health, School of Public Health, University of Adelaide, Adelaide, South Australia, Australia
| | - N A Bastian
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,School of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - R Hamon
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,Centre for Cancer Biology, SA Pathology and the University of South Australia, Adelaide, South Australia, Australia
| | - A Badiei
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | - P T Nguyen
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,School of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - K Herewane
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,School of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - H Jersmann
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,School of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - C M Bojanowski
- Pulmonary Critical Care Section, Veterans Affairs San Diego Healthcare System, San Diego, California.,Division of Pulmonary, Critical Care and Sleep Medicine, University of California San Diego, La Jolla, California
| | - J Shin
- Pulmonary Critical Care Section, Veterans Affairs San Diego Healthcare System, San Diego, California.,Division of Pulmonary, Critical Care and Sleep Medicine, University of California San Diego, La Jolla, California
| | - P N Reynolds
- Department of Thoracic Medicine, Royal Adelaide Hospital, Adelaide, South Australia, Australia.,School of Medicine, University of Adelaide, Adelaide, South Australia, Australia
| | - L E Crotty Alexander
- Pulmonary Critical Care Section, Veterans Affairs San Diego Healthcare System, San Diego, California.,Division of Pulmonary, Critical Care and Sleep Medicine, University of California San Diego, La Jolla, California
| | - S J Hodge
- School of Medicine, University of Adelaide, Adelaide, South Australia, Australia
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Hodge G, Hodge S, Nguyen PT, Yeo A, Sarkar P, Badiei A, Holmes‐Liew CL, Reynolds PN, Holmes M. Bronchiolitis obliterans syndrome is associated with increased p-glycoprotein expression and loss of glucocorticoid receptor from steroid-resistant proinflammatory CD8 + T cells. Clin Exp Immunol 2018; 192:242-250. [PMID: 29352737 PMCID: PMC5904702 DOI: 10.1111/cei.13103] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 01/08/2018] [Accepted: 01/09/2018] [Indexed: 12/31/2022] Open
Abstract
Immunosuppressive therapy fails to suppress the production of proinflammatory cytokines, particularly by CD8+ T cells, in stable lung transplant recipients and those undergoing chronic rejection, suggesting that some patients may become relatively resistant to immunosuppressants such as glucocorticoids (GC). We have shown loss of GC receptor (GCR) from the CD8+ cells, and we hypothesized that the drug membrane efflux pump, p-glycoprotein-1 (Pgp), may also be involved in lymphocyte steroid resistance following lung transplant. Pgp/GCR expression and interferon (IFN)-γ/tumour necrosis factor (TNF)-α proinflammatory cytokine production was measured in blood lymphocytes from 15 stable lung transplant patients, 10 patients with bronchiolitis obliterans syndrome (BOS) and 10 healthy aged-matched controls (± prednisolone ± Pgp inhibitor, cyclosporin A ± GCR activator, Compound A) using flow cytometry. Both Pgp+ and Pgp- lymphocyte subsets from all subjects produced IFN-γ/TNF-α proinflammatory cytokines. Pgp expression was increased in CD8+ Pgp+ T cells and correlated with IFN-γ/TNF-α expression and BOS grade. Reduced GCR was observed in CD8+ Pgp- T, natural killer (NK) T-like and NK cells from stable patients compared with controls, and reduced further in CD8+ Pgp- T cells in BOS. The addition of 2·5 ng/ml cyclosporin A and 1 µM prednisolone inhibit IFN-γ/TNF-α production significantly by CD8+ Pgp+ T cells from BOS patients. The addition of 10 µM Compound A and 1 µM prednisolone inhibit IFN-γ/TNF-α production significantly by CD8+ Pgp- T cells from BOS patients. BOS is associated with increased Pgp expression and loss of GCR from steroid-resistant proinflammatory CD8+ T cells. Treatments that inhibit Pgp and up-regulate GCR in CD8+ T cells may improve graft survival.
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Affiliation(s)
- G. Hodge
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - S. Hodge
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - P. T. Nguyen
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - A. Yeo
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
| | - P. Sarkar
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
| | - A. Badiei
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
| | - C. L. Holmes‐Liew
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
- South Australian Lung Transplant ServiceAdelaideSouth Australia
| | - P. N. Reynolds
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
| | - M. Holmes
- Lung Research Unit, Department of Thoracic MedicineRoyal Adelaide HospitalAdelaideSouth Australia
- Department of MedicineUniversity of AdelaideAdelaideSouth Australia
- South Australian Lung Transplant ServiceAdelaideSouth Australia
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Masoumi R, Badiei A, Mousakhani F, Dirandeh E, Zhandi M, Stear M. Quantification of the uterine involution and dimensions, hormonal response and reproductive performance of pyometric and healthy dairy cows treated with Dinoprost. S AFR J ANIM SCI 2018. [DOI: 10.4314/sajas.v48i2.3] [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]
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Vojoudi H, Badiei A, Amiri A, Banaei A, Ziarani G, Schenk-Joß K. Efficient device for the benign removal of organic pollutants from aqueous solutions using modified mesoporous magnetite nanostructures. Journal of Physics and Chemistry of Solids 2018; 113:210-219. [DOI: 10.1016/j.jpcs.2017.10.029] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Abstract
Pyrrolidine dithiocarbamate (PDTC) can be an oral chelator with pKa= 3.300±0.002. It behaves as a bidentate ligand at serum pH. The effect of pH on Ni2+-Tf indicated that the maximum adsorption was at pH=7.4. The effective Ni-PDTC binding constant was determined (logk=11.1±0.1) for the 1:2 Ni(PDTC)2 complex using UV-vis spectra. The isosbestic point at 298 indicated that the complexation reaction was done directly (without side reaction). Removal of Ni from transferrin (Tf) was investigated by reverse titration of PDTC at 25°C and pH=7.4 using UV-vis spectra. PDTC is able to remove 25% of Ni from human serum transferrin.
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Affiliation(s)
- A Hooshmand
- Department of Chemistry, Shahid Bahonar University of Kerman, Kerman, Iran
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Tavakoli F, Badiei A, Mohammadi Ziarani G, Tarighi S. Photocatalytic Application of TiO2–AgI Hybrid for Degradation of Organic Pollutants in Water. Int J Environ Res 2017; 11:217-224. [DOI: 10.1007/s41742-017-0021-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
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Badiei A, Chambers ST, Gaddam RR, Fraser R, Bhatia M. Cystathionine-gamma-lyase gene silencing with siRNA in monocytes/macrophages protects mice against acute pancreatitis. Appl Microbiol Biotechnol 2015; 100:337-46. [PMID: 26411454 DOI: 10.1007/s00253-015-6989-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2015] [Revised: 08/24/2015] [Accepted: 09/04/2015] [Indexed: 12/29/2022]
Abstract
Hydrogen sulphide (H2S) is an endogenous inflammatory mediator produced by cystathionine-γ-lyase (CSE) in monocytes/macrophages. To determine the role of H2S and macrophages in inflammation, we used small interference RNA (siRNA) to target the CSE gene and investigated its effect in a mouse model of acute pancreatitis. Acute pancreatitis is characterised by increased levels of plasma amylase, myeloperoxidase (MPO) activity and pro-inflammatory cytokines and chemokines in the pancreas and lung. SiRNA treatment attenuated inflammation in the pancreas and lungs of mice following caerulein-induced acute pancreatitis. MPO activity increased in caerulein-induced acute pancreatitis (16.21 ± 3.571 SD fold increase over control) and treatment with siRNA significantly reduced this (mean 3.555 ± 2.522 SD fold increase over control) (p < 0.0001). Similarly, lung MPO activity increased following treatment with caerulein (3.56 ± 0.941 SD fold increase over control) while siRNA treatment significantly reduced MPO activity (0.8243 ± 0.4353 SD fold increase over control) (p < 0.0001). Caerulein treatment increased plasma amylase activity (7094 ± 207 U/l) and this significantly decreased following siRNA administration (5895 ± 115 U/l) (p < 0.0001). Cytokine and chemokine levels in caerulein-induced acute pancreatitis reduced following treatment with siRNA. For example, siRNA treatment significantly decreased pancreatic and lung monocyte chemoattractant protein (MCP)-1 (169.8 ± 59.75 SD; 90.01 ± 46.97 SD pg/ml, respectively) compared to caerulein-treated mice (324.7 ± 103.9 SD; 222.8 ± 85.37 SD pg/ml, pancreas and lun,g respectively) (p < 0.0001). These findings show a crucial pro-inflammatory role for H2S synthesised by CSE in macrophages in acute pancreatitis and suggest CSE gene silencing with siRNA as a potential therapeutic approach for this condition.
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Affiliation(s)
- A Badiei
- Inflammation Research Group, Department of Pathology, University of Otago, 2 Riccarton Avenue, P.O. Box 4345, Christchurch, 8140, New Zealand
| | - S T Chambers
- Infection Research Group, Department of Pathology, University of Otago, Christchurch, New Zealand
| | - R R Gaddam
- Inflammation Research Group, Department of Pathology, University of Otago, 2 Riccarton Avenue, P.O. Box 4345, Christchurch, 8140, New Zealand
| | - R Fraser
- Inflammation Research Group, Department of Pathology, University of Otago, 2 Riccarton Avenue, P.O. Box 4345, Christchurch, 8140, New Zealand
| | - M Bhatia
- Inflammation Research Group, Department of Pathology, University of Otago, 2 Riccarton Avenue, P.O. Box 4345, Christchurch, 8140, New Zealand.
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Badiei A, Aliverdilou A, Amanlou H, Beheshti M, Dirandeh E, Masoumi R, Moosakhani F, Petit H. Postpartum responses of dairy cows supplemented with n-3 fatty acids for different durations during the peripartal period. J Dairy Sci 2014; 97:6391-9. [DOI: 10.3168/jds.2013-7743] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Accepted: 06/07/2014] [Indexed: 11/19/2022]
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Hajiabbasi P, Mohammadi Ziarani G, Badiei A, Abolhasani Soorki A. Application of SBA-Pr-NH2 in one-pot three-component reaction of methylene-carbonyl compounds, acenaphthenequinone, malononitriles and exploration of its antimicrobial activity. J IRAN CHEM SOC 2014. [DOI: 10.1007/s13738-014-0454-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Badiei A, Moosakhani F, Hamidi A, Sami M. The effect of Protexin on prevention of ileocecal infection by Mycobacterium avium subspecies paratuberculosis in dairy calves. J Dairy Sci 2013; 96:6535-8. [DOI: 10.3168/jds.2012-5535] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2012] [Accepted: 05/02/2013] [Indexed: 12/23/2022]
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Tutti F, Kamyab SM, Barghi MA, Badiei A. Extraction of edingtonite from a natural zeolite under hydrothermal conditions. Mater Sci-Pol 2013; 31:52-58. [DOI: 10.2478/s13536-012-0073-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Hajiaghababaei L, Badiei A, Shojaan M, Ganjali M, Ziarani G, Zarabadi-Poor P. A novel method for the simple and simultaneous preconcentration of Pb 2+, Cu 2+and Zn 2+ions with aid of diethylenetriamine functionalized SBA-15 nanoporous silica compound. International Journal of Environmental Analytical Chemistry 2012; 92:1352-1364. [DOI: 10.1080/03067319.2011.585715] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Parkinson IH, Badiei A, Stauber M, Codrington J, Müller R, Fazzalari NL. Vertebral body bone strength: the contribution of individual trabecular element morphology. Osteoporos Int 2012; 23:1957-65. [PMID: 22086309 DOI: 10.1007/s00198-011-1832-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2011] [Accepted: 08/30/2011] [Indexed: 10/15/2022]
Abstract
SUMMARY Although the amount of bone explains the largest amount of variability in bone strength, there is still a significant proportion unaccounted for. The morphology of individual bone trabeculae explains a further proportion of the variability in bone strength and bone elements that contribute to bone strength depending on the direction of loading. INTRODUCTION Micro-CT imaging enables measurement of bone microarchitecture and subsequently mechanical strength of the same sample. It is possible using micro-CT data to perform morphometric analysis on individual rod and plate bone trabeculae using a volumetric spatial decomposition algorithm and hence determine their contribution to bone strength. METHODS Twelve pairs of vertebral bodies (T12/L1 or L4/L5) were harvested from human cadavers, and bone cubes (10 × 10 × 10 mm) were obtained. After micro-CT imaging, a volumetric spatial decomposition algorithm was applied, and measures of individual trabecular elements were obtained. Bone strength was measured in compression, where one bone specimen from each vertebral segment was tested supero-inferiorly (SI) and the paired specimen was tested antero-posteriorly (AP). RESULTS Bone volume fraction was the strongest individual determinant of SI strength (r(2) = 0.77, p < 0.0001) and AP (r(2) = 0.54, p < 0.0001). The determination of SI strength was improved to r(2) = 0.87 with the addition of mean rod length and relative plate bone volume fraction. The determination of AP strength was improved to r(2) = 0.85 with the addition of mean rod volume and relative rod bone volume fraction. CONCLUSIONS Microarchitectural measures of individual trabeculae that contribute to bone strength have been identified. In addition to the contribution of BV/TV, trabecular rod morphology increased the determination of AP strength by 57%, whereas measures of trabecular plate and rod morphology increased determination of SI strength by 13%. Decomposing vertebral body bone architecture into its constituent morphological elements shows that trabecular element morphology has specific functional roles to assist in maintaining skeletal integrity.
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Affiliation(s)
- I H Parkinson
- Bone and Joint Research Laboratory, SA Pathology and Hanson Institute, Frome Road, Adelaide, South Australia, 5000, Australia.
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Abstract
In the present work, results of γ-irradiation on normal and functionalized SBA-15 by aurintricarboxylic acid have been reported. Characterization of normal and functionalized SBA-15 particles before and after γ-irradiation was carried out using Fourier-transform infrared technique. Aurintricarboxylic acid ligand connected to SBA-15 was also analyzed using UV/Vis spectrophotometer. The modified sorbent was then used as a new sorbent for separation of trace amounts of praseodymium and lutetium ions from nuclear waste waters in batch techniques. Based on the results of distribution coefficients determination, and investigation of sorption process in various conditions, the parameters were optimized for separation lanthanides. It can be concluded that the functionalized SBA-15 is a promising sorbent for praseodymium and lutetium cations.
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Affiliation(s)
- M H Mallah
- Jaber Ibn Hayan Research Labs, Nuclear Fuel Cycle Research School, Nuclear Science & Technology Research Institute, Atomic Energy Organization of Iran, End of North Karegar Ave., P.O. Box 14395-836, Tehran, Iran
| | - M Ghannadi Maragheh
- Jaber Ibn Hayan Research Labs, Nuclear Fuel Cycle Research School, Nuclear Science & Technology Research Institute, Atomic Energy Organization of Iran, End of North Karegar Ave., P.O. Box 14395-836, Tehran, Iran
| | - A Badiei
- Department of Inorganic Chemistry, Faculty of Chemistry, University of Tehran, Tehran, Iran
| | - R Habibzadeh Sbo
- Jaber Ibn Hayan Research Labs, Nuclear Fuel Cycle Research School, Nuclear Science & Technology Research Institute, Atomic Energy Organization of Iran, End of North Karegar Ave., P.O. Box 14395-836, Tehran, Iran
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Barati M, Seyyed Ebrahimi S, Badiei A. The role of surfactant in synthesis of magnetic nanocrystalline powder of NiFe2O4 by sol–gel auto-combustion method. Journal of Non-Crystalline Solids 2008; 354:5184-5185. [DOI: 10.1016/j.jnoncrysol.2008.06.109] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Dehghan R, Seyyed Ebrahimi S, Badiei A. Investigation of the effective parameters on the synthesis of Ni-ferrite nanocrystalline powders by coprecipitation method. Journal of Non-Crystalline Solids 2008; 354:5186-5188. [DOI: 10.1016/j.jnoncrysol.2008.08.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Nouri M, Pipelzadeh M, Badiei A. A Comparative Study on the Effectiveness of Garlic with Clofibrate in the Treatment of Hyperlipidemia. J of Medical Sciences 2007. [DOI: 10.3923/jms.2008.85.89] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Ghobeiti Hasab M, Seyyed Ebrahimi S, Badiei A. Comparison of the effects of cationic, anionic and nonionic surfactants on the properties of Sr-hexaferrite nanopowder synthesized by a sol–gel auto-combustion method. Journal of Magnetism and Magnetic Materials 2007; 316:e13-e15. [DOI: 10.1016/j.jmmm.2007.02.013] [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: 06/20/2023]
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Hasab MG, Ebrahimi SS, Badiei A. Effect of different fuels on the strontium hexaferrite nanopowder synthesized by a surfactant-assisted sol–gel auto-combustion method. Journal of Non-Crystalline Solids 2007; 353:814-816. [DOI: 10.1016/j.jnoncrysol.2006.12.048] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Ghobeiti Hasab M, Seyyed Ebrahimi S, Badiei A. The effect of surfactant hydrocarbon tail length on the crystallite size of Sr-hexaferrite powders synthesized by a sol–gel auto-combustion method. Journal of Magnetism and Magnetic Materials 2007; 310:2477-2479. [DOI: 10.1016/j.jmmm.2006.11.020] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Ghobeiti Hasab M, Seyyed Ebrahimi S, Badiei A. An investigation on physical properties of strontium hexaferrite nanopowder synthesized by a sol–gel auto-combustion process with addition of cationic surfactant. Journal of the European Ceramic Society 2007; 27:3637-3640. [DOI: 10.1016/j.jeurceramsoc.2007.02.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Alamolhoda S, Seyyed Ebrahimi SA, Badiei A. Optimization of the Fe/Sr ratio in processing of ultrafine strontium hexaferrite powders by a sol-gel autocombustion method. Phys Metals Metallogr 2006; 102:S71-S73. [DOI: 10.1134/s0031918x06140183] [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: 06/20/2023]
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Alamolhoda S, Seyyed Ebrahimi S, Badiei A. A study on the formation of strontium hexaferrite nanopowder by a sol–gel auto-combustion method in the presence of surfactant. Journal of Magnetism and Magnetic Materials 2006; 303:69-72. [DOI: 10.1016/j.jmmm.2005.10.194] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/20/2023]
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Badiei A, Bottema MJ, Fazzalari NL. Expected and observed changes to descriptors of trabecular architecture with aging--a comparison of measurement techniques. Australas Phys Eng Sci Med 2006; 29:48-53. [PMID: 16623220] [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] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
The fragility of trabecular bone depends not only on the amount of bone but also on its architecture. In order to assess fragility of bone, describe changes due to age, and monitor effect of disease or treatment, it is necessary to model the physical properties of trabecular bone architecture. An important feature of bone architecture is the degree of anisotropy (DA). Estimates of DA may be obtained from computed tomography data by characterizing orientation in images. Widely used image descriptors for estimating orientation in this setting include mean intercept length (MIL), line fraction deviation (LFD), star length distribution (SLD) and star volume distribution (SVD). In this study, estimates of DA computed via each of these image descriptors are compared on synthetic images for various combinations of trabecular thickness, separation and number. Estimates of DA are also computed for real images representing different stages of aging. It is found that estimates of DA vary substantially depending on the choice of image descriptor. In particular, the MIL tends to underestimate DA.
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Affiliation(s)
- A Badiei
- Bone & Joint Research Laboratory, Institute of Medical & Veterinary Science, Adelaide, Australia.
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