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- 저자 : Jabari, Nasim (검색결과 6 건)
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Afshar Alipour-Dehkordi,Sajad Jabari Neek,Alireza Shahnazar 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.113 No.-
Currently, fossil fuels are considered the primary energy carriers having a significant role in the globalenergy market. Two main features, including environmental pollution owing to greenhouse gas emissionsas well as fossil fuel reserves depletion, make severe instability in the world market. Consequently, researchers are trying to propose different processes to attain energy from renewablesources. In this study, a novel heat exchanger reactor for sustainable hydrogen production from glycerolsteam reforming has been suggested. In this configuration, the required heat of steam reforming reactionsis supplied through the catalytic combustion reaction. At the same time, the required fuel for thecombustion reactions is provided by reforming side by-products. A one-dimensional mathematical modelhas been developed to study the reactor behavior and the role of different influencing parameters on itsperformance. The results showed that it is feasible to eliminate the furnace used in the conventional processand enhance the glycerol conversion by 48% compared to the adiabatic reactor. Since the use of byproductsof the glycerol steam reforming as a heat source for the hydrogen production has not been usedso far, it can be acknowledged that this method could be feasible and beneficial in energy saving.
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Masoud Neghab,Zeinab Jabari,Fatemeh Kargar Shouroki 한국역학회 2018 Epidemiology and Health Vol.40 No.-
OBJECTIVES: The possible adverse respiratory effects of airborne pollutants in sawmills have not been thoroughly investigated in Iran. Additionally, the extent to which workers are exposed to this organic dust and its associated bioaerosols has not been extensively quantified. Likewise, the predominant bacterial and fungal species associated with wood dust have not been characterized. The present study was undertaken to address these issues. METHODS: One hundred male individuals exposed to wood dust and 100 unexposed male subjects were investigated. They completed a standardized respiratory symptom questionnaire and underwent spirometry testing. Additionally, airborne concentrations of respirable and inhalable dust particles, bacteria, and fungi were measured. RESULTS: The mean concentrations of inhalable and respirable dust particles, bacteria, and fungi were found to be 2.44, 6.76 mg/m3, 756.38, and 299.15 colony-forming units/m3, respectively. The predominant Gram-negative bacteria in the sawmills included the Pseudomonadaceae, Klebsiella pneumoniae, and Rhinoscleromatis spp., and the predominant fungi consisted of the zygomycetes and Aspergillus spp. Respiratory symptoms were significantly more prevalent among exposed workers. Significant cross-shift decrements were noted in some pulmonary function parameters. Similarly, pre-shift spirometry results indicated that some pulmonary function parameters were significantly lower in the exposed group. CONCLUSIONS: Exposure to wood dust and its bioaerosols was associated with significantly higher prevalence of respiratory symptoms and both acute (i.e., partially reversible) and chronic (i.e., irreversible) decrements in the functional capacity of the lung. Additionally, the characterized bioaerosols did not differ significantly from those isolated in other parts of the world.
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Bidgoli, Sepideh Arbabi,Jabari, Nasim,Zavarhei, Mansour Djamali Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.15
Background: Prostate-specific antigen (PSA) is a potential biomarker for early detection of prostate cancer (PCa) but its level is known to be affected by many background factors and roles of ubiquitous toxicants have not been determined. Endocrine disrupting chemicals (EDCs) are ubiquitous reproductive toxicants used in consumer products, which promote tumor formation in some reproductive model systems by binding to AhR, but human data on its expression in prostate cancer as well as its association with PSA levels are not clear. This study aimed to evaluate the expression levels of AhR and its association with serological levels of PSA and to detect possible effects of background factors and EDC exposure history on PSA levels in PCa cases. Materials and Methods: A cross-sectional study was conducted on the tissue levels of AhR and serum levels of PSA in 53 PCa cases from 2008-2011 and associations between each and background and lifestyle related factors were determined. Results: Although the AhR was overexpressed in PCa and correlated with the age of patients, it did not correlate with PSA levels.Of nutritional factors, increased intake of polysaturated fats and fish in the routine regimen of PCa cases increased the PSA levels significantly. Conclusions: AhR overexpression in PCa pontws to roles of EDCs in PCa but without any direct association with PSA levels. However, PSA levels are affected by exposure to possible toxicants in foods whichneed to be assessed as possible risk factors of PCa in future studies.
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Hamidreza Barnamehei,Faezeh Khazaee,Mohammad Ali Safaei,Hadi Jabari,Neda Golfeshan,Mohammad Barnamehei,Ali Rezaei,Mohammad Reza Kharazi,Nader Naghavi 국제무예학회 2020 International Journal of Martial Arts Vol.6 No.-
The aims of the current study were first, to evaluate whether there were differences in the front kicking kinematics executed by professional Taekwondo and Karate athletics. Second, biomechanical evaluations aimed to determine the kinematic variables of effective front kicking performance between different training strategies. Sixteen elite Taekwondo and fourteen Karate athletics performed front kick. Kinematics and kinetics were recorded using a ten high-speed camera and two force plates. Taekwondo and karate groups present significant kinematic and repeatability differences, which significant differences observed in the range of motion, angular velocity, and peak values of lower limb angular positions and velocities. Although, the movement pattern of a front kick in group was similar. Based on our results, different training strategies for one movement (front kick) can change neuromuscular, motor control, and kicking efficacy. Analyzing this kind of research and comparison between two different groups that executes the same action with two different learning methods can improve the knowledge of athletics and coaches to better performance in training and learning strategies. In addition, this type of study of training strategy and motor control can reduce sports mistakes in coaching, particularly in the primary period of athletics training, and decrease injury probability.
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