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RISS 인기검색어
- 검색키워드
- 저자 : S. Mojtaba Amininasab (검색결과 3 건)
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S. Mojtaba Amininasab,Elham Ghoseiri,Sara Abdolmaleki 한국고분자학회 2022 Macromolecular Research Vol.30 No.12
In this study, we designed and synthesized a new dental composite including Spiro [fluorene-9,9’-xanthene]-3',6’-diylbis (oxy) bis (2-hydroxypropane-3,1-diyl) bis (2-methylacrylate) (Xanthene-GMA) resin containing xanthene and fluorene parts and natural filler of fish bone powder with low water sorption and solubility and excellent biocompatibility. This dental composite reduces the risks that Bisphenol A derivatives released from composite Bis-GMA may pose to the oral environment. The Xanthene-GMA resin was synthesized from the condensation reaction in the presence of an acid catalyst. The surface of the fish bone powder was also modified by (3-trimethoxysilyl) propyl methacrylate (Silane A174) modifier for creating better bonding with the resin. The structural characterization of the compounds was confirmed by Fourier transform infrared spectroscopy (FT-IR), 1H nuclear magnetic resonance (NMR), field emission scanning electron microscopy (FESEM), energy dispersive X-ray (EDX), and thermogravimetric analysis (TGA) techniques. Then, the dental composite (Xanthene-GMA resin based on modified fish bones powder (XGMFB)) was prepared by heat and light curing. Finally, water sorption, solubility, cytotoxicity and antibacterial activity tests were evaluated. The thermal resistance of the composite was low due to the use of natural filler in fish bone powder. The composite showed low water sorption and solubility. The antibacterial and cytotoxicity activity of the composite was evaluated. S. aureus (MIC 16 μg/mL) and E. coli (MIC 32 μg /mL) were recognized as most susceptible gram-positive and gram-negative bacteria, respectively, after XGMFB treatment. The most inhibitory effect of XGMFB was observed against MCF7 cells (IC50 = 73.5μM, Maximum Inhibitory effect 78.18%).
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Sensitive Detection of Morphine by Efficient Molecular Imprinted Polymers Based on Goethite Nanorods
S. Mojtaba Amininasab,Parvin Holakooei,Zahed Shami,Marjan Hassanzadeh 한국고분자학회 2018 Macromolecular Research Vol.26 No.8
We prepared new morphine molecular imprinted polymer goethite nanorods (MMIPGN) which showed excellent adsorption properties due to presence of complementary cavities on the surface of polymer. MMIPGN was synthesized by using morphine as template, fumarate-functionalized goethite nanorods (FFGN) as auxiliary monomer, methcrylic acid (MAA) as functional monomer and ethylene glycol dimethacrylate (EGDMA) as a cross linker. The structural properties were characterized by Fourier transform infrared spectroscopy (FTIR), energy dispersive spectroscopy (EDS), field emission scanning electron microscopy (FESEM) and thermal gravimetric analysis (TGA). The adsorption behaviors of MMIPGN were monitored under various adsorption conditions such as contact time, pH, the amount of adsorbent and initial concentration of morphine. The selectivity of morphine by MMIPGN was investigated in the presence of foreign species such as epinephrine (Ep), ascorbic acid (Aa), and monoacetylmorphine (Mm) and the value of selectivity coefficients was obtained 1.19, 1.13, and 2.15, respectively. The experimental data were followed by Langmuir isotherm model and Elovich kinetic models.
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S. Mojtaba Amininasab,Nadiye Fallahi,Parisa Mohammadi,Zahed Shami 한국고분자학회 2024 Macromolecular Research Vol.32 No.8
Harmful heavy metals have a significant effect on the toxicity of wastewater due to their non-biodegradability; hence, they will harm living things. Graphene oxide has been studied in recent research to remove these heavy metals. This study was carried out to determine the characterization of graphene oxide-based hyperbranched polymers (GO-MHBP) and their batch experiments on removing heavy metals ( Cr3+ and Hg2+). The surface of the graphene oxide particles was modified by 3-(aminopropyl) triethoxysilane, and then hyperbranched polymers were fabricated by incorporating 3,5-diaminobenzoic acid and maleic anhydride. The synthesized polymers were characterized physically and morphologically using FT-IR, FESEM, EDX, and TGA techniques. Moreover, they were assessed in terms of adsorption capacity to remove pollutants of Cr3+ and Hg2+. To that end, the effect of pH, adsorbent amount, contact time, and initial concentrations of metal ions was evaluated. Furthermore, the adsorption kinetics and isothermal behavior were investigated for the adsorption efficiency of GO-MHBP nanocomposite. The adsorption process was consistent with the second-order kinetic model and the Langmuir isotherm model. Eventually, the GO-MHBP could serve as promising adsorbents for potential application in the removal of Cr3+ and Hg2+ from wastewater.
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