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| 1 | Extraction and characterization of alumina nanopowders from aluminum dross by acid dissolution process显示文摘A significant amount of aluminum dross is available as a waste in foundry industries in Bangladesh. In this study, alumina was extracted from aluminum dross collected from two foundry industries situated in Dhamrai and Manikgang, near the capital city, Dhaka. Aluminum dross samples were found to approximately contain 75wt% Al2O3 and 12wt% SiO2. An acid dissolution process was used to recover the alumina value from the dross. The effects of various parameters, e.g., temperature, acid concentration, and leaching time, on the extraction of alumina were studied to optimize the dissolution process. First, Al(OH)3 was produced in the form of a gel. Calcination of the Al(OH)3 gel at 1000°C, 1200°C, and 1400°C for 2 h produced θ-Al2O3,(α+θ)-Al2O3, and α-alumina powder, respectively. Thermal characterization of the Al(OH)3 gel was performed by thermogravimetric/differential thermal analysis(TG/DTA) and differential scanning calorimetry(DSC). The phases and crystallite size of the alumina were determined by X-ray diffraction analysis. The dimensions of the alumina were found to be on the nano level. The chemical compositions of the aluminum dross and alumina were determined by X-ray fluorescence(XRF) spectroscopy. The microstructure and morphology of the alumina were studied with scanning electron microscopy. The purity of the alumina extracted in this study was found to be 99.0%. Thus, it is expected that the obtained alumina powders can be potentially utilized as biomaterials. | Saifur Rahman Sarker Zahangir Alam Rakibul Qadir M A Gafur Mohammad Moniruzzaman | 2015 | International Journal of Minerals,Metallurgy and Materials2015，22，4： | 20 |
| 2 | Polymer nanocomposites containing carbon nanotubes显示文摘 | Mohammad Moniruzzaman Karen I Winey | 2006 | Macromolecules2006，39，： | 1 |
| 3 | Interactive effect of dietary vitamin E and inorganic mercury on growth performance and bioaccumulation of mercury in juvenile olive flounder, Paralichthys olivaceus treated with mercuric chloride显示文摘A 6-week feeding trial was carried out to evaluate the effects of dietary vitamin E(DL-a-tocopheryl acetate, TA) on growth and mercury(Hg) accumulation in juvenile olive flounder(Paralichthys olivaceus)treated with mercuric chloride(HgCl_2). Vitamin E and HgCl_2 were added to the semi-purified basal diet.Six semi-purified diets in a 2 × 3 factorial design were formulated to contain 2 levels of Hg(0 or 20 mg HgCl_2/kg diet) and 3 levels of vitamin E(0, 100, or 200 mg TA/kg diet). Experimental fish(n = 360,9.99 ± 0.15 g) were randomly allocated into 30-L tanks at a density of 20 fish per tank with 3 replicates in each treatment and were fed twice a day. At the end of the feeding trial, dietary Hg depressed the growth performances in terms of weight gain(WG), specific growth rate(SGR), feed efficiency(FE) and protein efficiency ratio(PER) in fish, while fish fed the diets supplemented with vitamin E showed significant growth improvement in both presence and absence of HgCl_2 in the diets(P < 0.05). Survival rate was not affected in fish fed the experimental diets. Whole body compositions of fish such as lipid and moisture contents were influenced by dietary vitamin E supplementation. Total Hg contents of muscle, liver and kidney tissues were significantly reduced in fish fed diets supplemented with vitamin E(P< 0.05), while the two-way ANOVA showed that increasing Hg concentration has resulted in a reduction in vitamin E.Whole body fatty acids of fish like eicosapentaenoic acid(EPA) and docosahexaenoic acid(DHA) contents were decreased by dietary Hg. However, supplementation of dietary vitamin E improved the a-linolenic acid(ALA) and EPA contents in fish. Our results suggest that dietary supplementation of vitamin E has potential effects on growth improvement and ameliorating inorganic Hg bioaccumulation in juvenile olive flounder. | Mohammad Moniruzzaman Jun-Ho Lee Jin-Hyeok Lee Seonghun Won Jim H.Damusaru Sungchul C.Bai | 2017 | Animal Nutrition2017，，3： | 1 |
| 4 | Determination of Mineral, Trace Element, and Pesticide Levels in Honey Samples Originating from Different Regions of Malaysia Compared to Manuka Honey显示文摘 | Mohammed Moniruzzaman Muhammed Alamgir Zaman Chowdhury Mohammad Abdur Rahman Siti Amrah Sulaiman Siew Hua Gan Miroslav Pohanka | 2014 | BioMed Research International2014，，： | 1 |
| 5 | Polymer Nanocomposites Containing Carbon Nanotubes 显示文摘 | Mohammad Moniruzzaman Karen I Winey | 2006 | Macromolecules2006，39，16： | 1 |
| 6 | Bilateral Coupled Epsilon Negative Metamaterial for Dual Band Wireless Communications显示文摘This work presents a dual band epsilon negative(ENG)metamaterial with a bilateral coupled split ring resonator(SRR)for use in C and X band wireless communication systems.The traditional split-ring resonator(SRR)has been amended with this engineered structure.The proposed metamaterial unit cell is realized on the 1.6 mm thick FR-4 printed media with a dimension of 10×10 mm2.The resonating patch built with a square split outer ring.Two interlinked inner rings are coupled vertically to the outer ring to extend its electrical length as well as to tune the resonance frequency.Numerical simulation is performed using CST studio suite 2019 to design and performance analysis.The transmission coefficient(S21)of the proposed unit cell and array configuration exhibits two resonances at 6.7 and 10.5 GHz with wide bandwidth extended from 4.86 to 8.06 GHz and 10.1 to 11.2 GHz,respectively.Negative permittivity is noted at frequencies between 6.76–9.5 GHz and 10.5–12 GHz,consecutively,with near-zero refractive index and permeability.The optimal EMR value depicts the compactness of the proposed structure.The 1×2,2×2 and 4×4 arrays are analyzed that shows similar response compared to the unit cell.Measured results of the 2×2 array shows the close similarity of S21 response as compared to simulation.The observed properties of the proposed unit cell ascertain its suitability for wireless communications by enhancing the gain and directivity of the antenna system. | Md Mhedi Hasan Mohammad Tariqul Islam Md Moniruzzaman Mohd Hafiz Uddin Norsuzlin Binti Mohd Sahar Md Samsuzzaman | 2022 | Computers, Materials & Continua2022，，4： | 0 |
| 7 | L-carnitine improves developmental competence of buffalo oocytes in vitro显示文摘Objective:To investigate the effect of L-carnitine on in vitro maturation and subsequent in vitro embryo production of buffalo oocytes.Methods:Cumulus oocyte complexes(COCs)were aspirated from ovaries of slaughtered buffaloes.COCs were classified into good and fair qualities based on morphological observation of numbers and integrity of cumulus cells surrounding the oocyte.Both categories of COCs were placed in in vitro maturation medium with supplementation of different concentrations(0,0.250,0.375 or 0.500 mg/mL)of L-carnitine.Oocytes from both qualities were in vitro fertilized and in vitro cultured for 7 days,to examine the developmental competence.Results:Supplementation of L-carnitine to in vitro maturation medium increased the cumulus cell expansion rate of COCs to grade A,and reduced the cumulus cell expansion of COCs to grade B and grade C in both good and fair quality oocytes.Similarly,L-carnitine induced the in vitro meiotic progression of buffalo oocytes to metaphaseⅡin both good and fair quality oocytes.Additionally,L-carnitine reduced the rate of oocyte degeneration in both good and fair quality oocytes.L-carnitine increased the rate of cleaved formation at day 2 and blastocyst formation at day 7 during in vitro culture in both qualities of oocytes.Moreover,a higher rate of blastocyst production was observed in L-carnitine-treated fair quality oocytes,which was higher than the results in the untreated good quality oocytes.Conclusions:L-carnitine enhances meiotic maturation and subsequent embryo development from both good and fair quality buffalo oocytes. | Avijit Kumar Modak Md Nuronnabi Islam Asma Khatun Md Hasanur Alam Ireen Akter AKM Ahsan Kabir Md Abul Hashem Mohammad Moniruzzaman | 2022 | Asian pacific Journal of Reproduction2022，11，5： | 0 |
| 8 | Wordsworth's Nature Poetry: An Eco-Scientific Perspective显示文摘 | Mohammad Moniruzzaman Miah | 2012 | Sino-US English Teaching2012，9，12： | 0 |
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