Mostafizur Rahman
Queensland University of Technology
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Publication
Featured researches published by Mostafizur Rahman.
SAE International Journal of Fuels and Lubricants | 2013
Phuong X. Pham; Timothy A. Bodisco; Svetlana Stevanovic; Mostafizur Rahman; Hao Wang; Zoran Ristovski; Richard J. Brown; Assaad R. Masri
This experimental study examines the effect on performance and emission outputs of a compression ignition engine operating on biodiesels of varying carbon chain length and the degree of unsaturation. A well-instrumented, heavy-duty, multi-cylinder, common-rail, turbo-charged diesel engine was used to ensure that the results contribute in a realistic way to the ongoing debate about the impact of biofuels. Comparative measurements are reported for engine performance as well as the emissions of NOx, particle number and size distribution, and the concentration of the reactive oxygen species (which provide a measure of the toxicity of emitted particles). It is shown that the biodiesels used in this study produce lower mean effective pressure, somewhat proportionally with their lower calorific values; however, the molecular structure has been shown to have little impact on the performance of the engine. The peak in-cylinder pressure is lower for the biodiesels that produce a smaller number of emitted particles, compared to fossil diesel, but the concentration of the reactive oxygen species is significantly higher because of oxygen in the fuels. The differences in the physicochemical properties amongst the biofuels and the fossil diesel significantly affect the engine combustion and emission characteristics. Saturated short chain length fatty acid methyl esters are found to enhance combustion efficiency, reduce NOx and particle number concentration, but results in high levels of fuel consumption.
Journal of Environmental and Analytical Toxicology | 2015
Annalicia Vaughan; Svetlana Stevanovic; L. Morrison; Ali Mohammad Pourkhesalian; Mostafizur Rahman; Ali Zare; Branka Miljevic; Felicia Goh; ana Relan; Rayleen Bowman; Kwun M. Fong; Steven E. Bottle; Zoran Ristovski; Ian A. Yang
Background n nExposure to air pollutants, including diesel particulate matter, has been linked to adverse respiratory health effects. Inhaled diesel particulate matter contains adsorbed organic compounds. It is not clear whether the adsorbed organics or the residual components are more deleterious to airway cells. Using a physiologically relevant model, we investigated the role of diesel organic content on mediating cellular responses of primary human bronchial epithelial cells (HBECs) cultured at an air-liquid interface (ALI). n nMethods n nPrimary HBECs were cultured and differentiated at ALI for at least 28 days. To determine which component is most harmful, we compared primary HBEC responses elicited by residual (with organics removed) diesel emissions (DE) to those elicited by neat (unmodified) DE for 30 and 60 minutes at ALI, with cigarette smoke condensate (CSC) as the positive control, and filtered air as negative control. Cell viability (WST-1 cell proliferation assay), inflammation (TNF-α, IL-6 and IL-8 ELISA) and changes in gene expression (qRT-PCR for HO-1, CYP1A1, TNF-α and IL-8 mRNA) were measured. n nResults n nImmunofluorescence and cytological staining confirmed the mucociliary phenotype of primary HBECs differentiated at ALI. Neat DE caused a comparable reduction in cell viability at 30 or 60 min exposures, whereas residual DE caused a greater reduction at 60 min. When corrected for cell viability, cytokine protein secretion for TNF-α, IL-6 and IL-8 were maximal with residual DE at 60 min. mRNA expression for HO-1, CYP1A1, TNF-α and IL-8 was not significantly different between exposures. n nConclusion n nThis study provides new insights into epithelial cell responses to diesel emissions using a physiologically relevant aerosol exposure model. Both the organic content and residual components of diesel emissions play an important role in determining bronchial epithelial cell response in vitro. Future studies should be directed at testing potentially useful interventions against the adverse health effects of air pollution exposure.
Energy Conversion and Management | 2015
Nurun Nabi; Mostafizur Rahman; Muhammad Aminul Islam; Farhad M. Hossain; Peter Brooks; William N. Rowlands; John Tulloch; Zoran Ristovski; Richard J. Brown
Science & Engineering Faculty | 2016
Nurun Nabi; Ali Zare; Farhad M. Hossain; Mostafizur Rahman; Timothy A. Bodisco; Zoran Ristovski; Richard J. Brown
School of Chemistry, Physics & Mechanical Engineering; Institute of Health and Biomedical Innovation; Science & Engineering Faculty | 2016
Meng Xiu; Mostafizur Rahman; Ali Mohammad Pourkhesalian; Hien Nguyen; Svetlana Stevanovic; Lidia Morawska; Phong K. Thai
European Respiratory Journal | 2016
Annalicia Vaughan; Svetlana Stevanovic; Mostafizur Rahman; Ali Zare; Branka Miljevic; Zoran Ristovski; Rayleen Bowman; Kwun M. Fong; Ian A. Yang
Science & Engineering Faculty | 2015
Nurun Nabi; Ali Zare; Farhad M. Hossain; Timothy A. Bodisco; Mostafizur Rahman; Zoran Ristovski; Richard J. Brown
Science & Engineering Faculty | 2015
Ali Zare; Timothy A. Bodisco; Mostafizur Rahman; Zoran Ristovski; Richard J. Brown
Archive | 2013
Hao Wang; Mostafizur Rahman; Zoran Ristovski
Research Journal of Pharmacy and Technology | 2012
Nowshin N. Rumzhum; Mostafizur Rahman; Afm Rafiu-Ul Islam