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RISS 인기검색어
- 검색키워드
- 저자 : Maryam Soleimani (검색결과 4 건)
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Processing Route Effects on the Mechanical and Corrosion Properties of Dual Phase Steel
Maryam Soleimani,Hamed Mirzadeh,Changiz Dehghanian 대한금속·재료학회 2020 METALS AND MATERIALS International Vol.26 No.6
The mechanical and corrosion behaviors of low carbon DP steel were studied based on different processing routes: (1)intercritical annealing (IA), (2) step quenching (SQ) via austenitization and quick transferring of the sample to the secondfurnace, and (3) Slow SQ via furnace cooling to the desired temperature. The properties were found to be highly dependenton the volume fraction of martensite (VM) and the density of ferrite/martensite interfaces. However, at the same martensitecontent, the mechanical properties of Slow SQ sheet were inferior than those of SQ and IA sheets, which were related to therelatively poor work-hardening behavior due to the severe partitioning of Mn between ferrite and martensite phases. Thelatter was also responsible for an increase in the corrosion current density (icorr) via galvanic corrosion. These results wereanalyzed based on the polarization curves and Nyquist plots obtained from the electrochemical impedance spectroscopytest. This study revealed that the SQ route can result in both better mechanical performance and higher corrosion resistance.
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The Effects of Resveratrol on Silica-Induced Lung Oxidative Stress and Inflammation in Rat
Esfahani Maryam,Rahbar Amir Hossein,Asl Sara Soleimani,Bashirian Saed,Mir Moeini Effat Sadat,Mehri Fereshteh 한국산업안전보건공단 산업안전보건연구원 2023 Safety and health at work Vol.14 No.1
Background: Chronic exposure to silica is related with the provocation of an inflammatory response and oxidative stress mechanism. Vitamin D has multiple benefits in biological activities particularly respiratory system disease. Method: In this research, 20 male Wistar rats were randomly allocated into four groups (5 rats /group) as follow:Group1 received saline as (negative control) group. The group 2 received a single IT instillation of silica (positive control) group; the group 3was co-administratedwith single ITsilica and Vitamin D (20mg/kg/day) daily for a period of 90 days. The rats of group 4 received Vitamin D daily for a period of 90 days. Results: Silica significantly increased serum and lung total Oxidant Status (TOS). Meanwhile, silica reduced serum and lung total antioxidant capacity (TAC), GSH and tumor necrosis factor-a (TNF-a). Vitamin D treatment meaningfully reversed oxidative stress, antioxidants status and inflammatory response. Also, Vitamin D improved histopathological changes caused by silica. Conclusion: These findings indicate that Vitamin D exerts protective effects against silica-induced lung injury. It seems that Vitamin D has potential use as a therapeutic object for silica induced lung injure.
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Atasheh Soleimani-Gorgani,Jamal Al-Sabahi,Sepideh Akbaripoor Tafreshi Nejad,Maryam Heydari,Mohammed Al-Abri,Arash Namaeighasemi 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.120 No.-
Sn- and graphene oxide (GO) single-doped and Sn/Cu co-doped titanium dioxide (TiO2) nanoparticleswere synthesized as printed-layer nano-photocatalysts for degradation of phenol under visible-light. The doped TiO2 nanoparticles (Sn-doped-TiO2, Cu/Sn-doped-TiO2, and GO-doped-TiO2) were synthesizedvia sol–gel method and calcinated at a temperature of 450 C. X-ray diffraction (XRD), UV–Visible DRSanalysis, Raman analyses, and Energy-dispersive X-ray spectroscopy (EDXS) were utilized to evaluatethe crystalline structure and photocatalytic activities of doped-TiO2 nanoparticles. Different screenprintingpastes were separately formulated with 26% w/w doped-TiO2 nanoparticles (Paste1-to-Paste3)for printing onto microscope glass slides. Photocatalytic printed film was sustainable filter for unusedsuspension of nanoparticles in wastewater. The printed pasts were sintered at varying temperatures(100–500 C), then three-layer printed nanoparticles sintered at 500 C examined for photocatalysis. Photocatalytic activity of single-layer-printed GO-doped-TiO2 nanoparticles was extraordinary (80%degradation of 10 ppm phenol solution). Hydroquinone, catechol, benzoquinone and acetic acid wereobserved to be produced at different concentrations over different time intervals as a result of phenoldegradation for single-layer-printed GO-doped-TiO2 nanoparticles sintered at 500 C. Bandgap of GOdoped-TiO2nanoparticles was 2 eV, meaningfully lower than anatase TiO2 (3.2 eV). The cytotoxicity assayapplied for normal and cancer cells demonstrated cytocompatibility besides photodegradability. Thisnovel process is a targeted, clean, cost-effective and on-demand approach, taking a big step towarddecontamination of the environmental pollution.
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Esmaeilzadeh Mohammad,Moradkhani Shirin,Daneshyar Fahimeh,Arabestani Mohammad Reza,Soleimani Asl Sara,Tayebi Soudeh,Farhadian Maryam 대한치과보존학회 2023 Restorative Dentistry & Endodontics Vol.48 No.1
Objectives In this study, natural substances were introduced as primary dental pulp caps for use in pulp therapy, and the antimicrobial and cytotoxic properties of these substances were investigated. Materials and Methods In this in vitro study, the antimicrobial properties of calcium-enriched mixture (CEM) cement, propolis, and propolis individually combined with the extracts of several medicinal plants were investigated against Enterococcus faecalis, Escherichia coli, Pseudomonas aeruginosa, and Staphylococcus aureus. Then, the cytotoxicity of each substance or mixture against pulp stem cells extracted from 30 primary healthy teeth was evaluated at 4 concentrations. Data were gathered via observation, and optical density values were obtained using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl-2H-tetrazolium bromide (MTT) test and recorded. SPSS software version 23 was used to analyze the data. Data were evaluated using 2-way analysis of variance and the Tukey test. Results Regarding antimicrobial properties, thyme alone and thyme + propolis had the lowest minimum inhibitory concentrations (MICs) against the growth of S. aureus, E. coli, and P. aeruginosa bacteria. For E. faecalis, thyme + propolis had the lowest MIC, followed by thyme alone. At 24 and 72 hours, thyme + propolis, CEM cement, and propolis had the greatest bioviability in the primary dental pulp stem cells, and lavender + propolis had the lowest bioviability. Conclusions Of the studied materials, thyme + propolis showed the best results in the measures of practical performance as a dental pulp cap.
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