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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 | Tagetes erecta Linn.and its mosquitocidal potency against Culex quinquefasciatus显示文摘Objective:To investigate mosquitocidal effects of ethanolic extract of(lowers of Tagetes erecta(T.erecta) and its chloroform and petroleum ether soluble fractions against the larvae of Culex quinquefasciatus(Cx.quinquefasciatus).Methods:The fresh flowers of T.erecta were extracted in cold with ethanol(5.0 L) and after concentration,the ethanol extract was fractionated with chloroform and petroleum ether to afford a brownish syrupy suspension of ethanol extract(50.0 g),petroleum ether soluble fraction(18.6 g) and chloroform soluble fraction(23.8 g).The larvicidal effect of ethanol extract and their solvent fractions were determined by the standard procedure of WHO against different instars of Cx.quinquefasciatus.Results:Among the tested samples the chloroform soluble fractions showed the highest toxicity and consequently,the lowest LC_(50) values(14.14 μ g/mL,17.06 μ g/mL.36.88 μ g/mL and 75.48 μ g/mL) for all the instars larvae of Cx.quinquefasciatus.The larvae showed comparative tolerance in the course of increasing age and time.Conclusions:It can be concluded that the flowers of T.erecta are very effective natural larvicide and could be useful against Cx.quinquefasciatus. | Farjana Nikkon M Rowshanul Habib Zahangir Alam Saud M Rezaul Karim | 2011 | Asian Pacific Journal of Tropical Biomedicine2011，1，3： | 10 |
| 3 | Cytokine profile in Egyptian hepatitis C virus genotype-4 in relation to liver disease progression显示文摘AIM: To observe the imbalance between T helper cell Th1 and Th2 cytokines in several chronic hepatitis disease at different stages of disease progression.METHODS: We measured the cytokine levels of Th1 (IL-2 and IL-2R), Th2 (IL-10) and the pro-inflammatory cytokines (IL-6 and IL-6R and TNF and TNF-RⅠ and Ⅱ)by the ELISA technique in the sera of 33 hepatocellular carcinoma (HCC) patients and 20 chronic liver disease (CLD) patients. In addition, 20 asymptomatic hepatitis C virus carriers and 20 healthy subjects negative for hepatitis C virus(HCV) markers served as controls.RESULTS: Anti-HCV antibodies were found to be positive in 94% of HCC cases and 75% of CLD cases.On the other hand, HCV viremia was detected using RTPCR in 67% of HCC cases and 65% of CLD cases. HBsAg was positive in 9% of HCC cases and 30% of CLD cases.Also bilharzial-Ab was positive in 55% of HCC cases,65% of CLD cases and in 70% of asymptomatic carriers (ASC). HCC patients had significantly higher values of IL-2R, TNF-RⅡ (P<0.001), and TNF-RⅠ (P>0.05), but lower TNFα (P<0.001) and IL-6 (P = 0.032) in comparison to ASC. But, in comparison to non-cancer controls, HCC patients had higher values of IL-2R, IL-6R, TNF-RⅠ and TNF-RⅡ, but lower TNF-α (P<0.001). CLD patients had higher IL-2R, TNF-RⅠ, and TNF-RⅡ (P<0.001) than ASC. But, in comparison to non-cancer controls, CLD patients had higher values of IL-2R, TNF-RⅠ and TNF-RⅡ, but lower TNF-α (P<0.001). IL-10 was higher (though not significantly) in HCC and CLD patients than in symptomatic carriers and non-cancer controls.CONCLUSION: Liver disease progression from CLD to HCC due to HCV genotype-4 infection is associated with an imbalance between Th1 and Th2 cytokines. IL-2R,TNF-RⅠ, and TNF-RⅡ could be used as potential markers. | Abdel-Rahman N Zekri Mohammed S El-Din Ashour Ahmed Hassan Hanaa M Alam El-Din Amal MR El-Shehaby Maha A Abu-Shady | 2005 | World Journal of Gastroenterology2005，11，42： | 4 |
| 4 | Non-invasive diagnosis of H pylori infection: Evaluation of serological tests with and without current infection marker CIM显示文摘AIM:To evaluate the performance of commercially available immunochromatographic (ICT) and immunoblot tests covering the current infection marker CIM and conventional ELISA for the diagnosis of H pylori infection in adult dyspeptic patients. METHODS:Consecutive non-treated dyspeptic patients undergoing diagnostic endoscopy were tested for H pylori infection by culture, rapid urease test, and histology of gastric biopsy specimens. Serum from 61 H pylori infected and 21 non-infected patients were tested for anti-H pylori IgG antibodies by commercial ELISA (AccuBindTM ELISA, Monobind, USA), ICT (Assure H pylori Rapid Test, Genelabs Diagnostics, Singapore), and immunoblot (Helico Blot 2.1, Genelabs Diagnostics, Singapore) assays. ICT and immunoblot kits cover CIM among other parameters and their performance with and without CIM was evaluated separately. RESULTS:Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy of ELISA were 96.7%, 42.8%, 83.1%, 81.8%, and 82.9%, of ICT were 90.1%, 80.9%, 93.2%, 73.9%, and 87.8%, of ICT with CIM were 88.5%, 90.4%, 96.4%, 73.0%, and 89.0%, of immunoblot were 98.3%, 80.9%, 93.7%, 94.4%, and 93.9%, and of immunoblot with CIM were 98.3%, 90.4%, 96.7%, 95.0%, and 96.3%, respectively. CONCLUSION:Immunoblot with CIM had the best performance. ICT with CIM was found to be more specific and accurate than the conventional ELISA and may be useful for non-invasive diagnosis of H pylori infection. | Sufi HZ Rahman M Golam Azam M Anisur Rahman MS Arfin M Mahbub Alam Tareq M Bhuiyan Nasim Ahmed Motiur Rahman Shamsun Nahar MS Hassan | 2008 | World Journal of Gastroenterology2008，14，8： | 4 |
| 5 | Petrography and geochemistry of Jumara Dome sediments, Kachchh Basin: Implications for provenance, tectonic setting and weathering intensity显示文摘In the Kachchh Mainland, the Jumara Dome mixed carbonate-siliciclastic succession is represented by the Jhurio and Patcham formations and siliciclastic-dominating Chari Formation(Bathonian to Oxfordian). The Jumara Dome sediments were deposited during sea-level fluctuating, and were interrupted by storms in the shallow marine environment. The sandstones are generally medium-grained, moderately sorted, subangular to subrounded and of low sphericity. The sandstones are mineralogically mature and mainly composed of quartzarenite and subarkose. The plots of petrofacies in the Qt-F-L, Qm-F-Lt, Qp-Lv-Ls and Qm-P-K ternary diagrams suggest mainly the basement uplift source(craton interior) in rifted continental margin basin setting. The sandstones were cemented by carbonate, iron oxide and silica overgrowth. The Chemical Index of Alteration values(73% sandstone and 81% shale) indicate high weathering conditions in the source area. Overall study suggests that such strong chemical weathering conditions are of unconformity with worldwide humid and warm climates during the Jurassic period. Positive correlations between Al2O3 and Fe2O3, TiO2, Na2O, MgO, K2O are evident. A high correlation coefficient between Al2O3 and K2O in shale samples suggests that clay minerals control the major oxides. The analogous contents of Si, Al, Ti, LREE and TTE in the shale to PAAS with slightly depleted values of other elements ascribe a PAAS like source(granitic gneiss and minor mafics) to the present study. The petrographic and geochemical data strongly suggest that the studied sandstones/shales were deposited on a passive margin of the stable intracratonic basin. | Ahmad A.H.M Noufal K.N Masroor Alam M Tavheed Khan | 2014 | Chinese Journal Of Geochemistry2014，33，1： | 3 |
| 6 | Acute effects of smoking on diastolic function in healthy participants: studies by conventional Doppler echocardiography and Doppler tissue imaging 显示文摘 | Alam M Samad BA WardeU J | 2002 | J Am Soc Echocardiogr2002，15，102： | 1 |
| 7 | Dynamic modeling, design and simulation of a wind/fucl cell/ultra-capacitor-based hybrid power generation system显示文摘 | Onar O C Uzunoglu M Alam M S | 2006 | Journal of Power Sources2006，，161： | 1 |
| 8 | Alcohol septal ablation for hypertrophic obstructive cardiomyopathy: a systematic review of published studies显示文摘 | Alam M Dokainish H Lakkis N | 2006 | J Interv Cardiol2006，19，4： | 1 |
| 9 | MHD free and forced convection boundary layer flow along a vertical porous plate显示文摘 | Hossaln M A Alam K C A Rees D A S | 1997 | Appl Mech Engrg1997，2，1： | 1 |
| 10 | Strouhal numbers, forces and flow structures around two tandem cylinders of different diameters 显示文摘 | ALAM M M ZHOU Y | 2008 | Journal of Fluids and Structures2008，24，4： | 1 |
| 11 | Effect of first myocardial infarction on left ventrieular systolic and diastolic function with the use of mitral annular velocity determined by pulse wave Doppler tissue imaging显示文摘 | Alam M Wardell J Andersson E | 2000 | J Am Soc Echocardiography2000，13，5： | 1 |
| 12 | Reliability analysis and full - scale testing of transmission tower显示文摘 | Alam M J Santhakumar A R | 1994 | Journal of Structural Engineering ASCE1994，122，3： | 1 |
| 13 | Measurements of differential capacitance in room temperature ionic liquid at mercury, glassy carbon and gold electrode interfaces 显示文摘 | Alam M T Islam M M Okajima T | 2007 | Electrochem Commun2007，9，9： | 1 |
| 14 | Effects of first myocardial infarction on left ventricular systolic and diastolic function with the use of mitral annular velocity determined by pulsed wave Doppler tissue imaging显示文摘 | Alam M Wardell J Andersson E | 2000 | J Am Soc Echocardiogr2000，13，5： | 1 |
| 15 | Direct medical costs for surgical and medical treatment of condylomata acuminata 显示文摘 | Alam M Stiller M | 2001 | Arch Dermatol2001，137，3： | 1 |
| 16 | Extraction of rhodium from other platinum group metals with Kelex 100 from chloride media containing tin显示文摘 | Alam M S Inoe K | 1997 | Hydrometallurgy1997，46，3： | 1 |
| 17 | Studies of γ-ray induced polymerization of aqueous acrylamide 显示文摘 | ALAM M AKHTAR F MINA M | 2003 | Polymer plastics Tech- nology and Engineering2003，42，2： | 1 |
| 18 | Heme oxygenase-1/carbon monoxide: from basic science to therapeutic applications显示文摘 | Ryter S W Alam J Choi A M K | 2006 | Physiological Reviews2006，86，： | 1 |
| 19 | The Processes of Location Study for Developing Economic Zones under Public Private Partnership Model: Country Study on Bangladesh显示文摘 | Alam M Rashed A | 2014 | Journal of Economics and Business Research2014，17，2： | 1 |
| 20 | Effect of non-plastic silt content on the liquefaction behavior of sand-silt mixture显示文摘 | KARIM M E ALAM M J | 2014 | Soil Dynamics and Earthquake Engineering2014，65，： | 1 |
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