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1Extraction 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 2015International Journal of Minerals,Metallurgy and Materials2015,22,4:20
2垄作免耕技术对土壤水分和玉米产量的影响(英文)显示文摘该文以 2006 年建立的垄作少免耕定位试验田为研究对象,分析了传统垄作和碎秆全量覆盖垄作少免耕和高留茬垄作少免耕 3 种耕作方式对土壤水分以及作物产量等的影响,以建立适合玉米垄作体系的垄作播种技术。5 a 长期定位试验结果表明,垄作少免耕种植模式能够改善土壤结构,增加土壤蓄水保墒能力,提高土壤水分利用效率;与传统垄作模式相比,碎秆全量覆盖和高留茬覆盖 2 种垄作少免耕模式的作物产量分别增加了 4.1%~10.7%和 1.9%~6.4%,土壤水分利用效率分别提高了 5.4%~10.2%和 4.1%~7.9%,其中碎秆全量覆盖垄作少免耕模式效果最为明显。研究结果可为辽宁省垄作播种模式的开展提供参考。王庆杰 李洪文 何进 李慧 Khokan Kumer Sarker 2012农业工程学报2012,28,S2:13
3Molecularly targeted therapy for advanced hepatocellular carcinoma-a drug development crisis?显示文摘Hepatocellular carcinoma is the fastest growing cause of cancer related death globally. Sorafenib,a multitargeted kinase inhibitor,is the only drug proven to improve outcomes in patients with advanced disease offering modest survival benefit. Although comprehensive genomic mapping has improved understanding of the genetic aberrations in hepatocellular cancer(HCC),this knowledge has not yet impacted clinical care. The last few years have seen the failure of several first and second line phase Ⅲ clinical trials of novel molecularly targeted therapies,warranting a change in the way new therapies are investigated in HCC. Potential reasons for these failures include clinical and molecular heterogeneity,trial design and a lack of biomarkers. This review discusses the current crisis in HCC drug development and how we should learn from recent trial failures to develop a more effective personalised treatment paradigm for patients with HCC.Kiruthikah Thillai Paul Ross Debashis Sarker 2016World Journal of Gastrointestinal Oncology2016,8,2:9
4植物乳杆菌KLDS 1.0318对小鼠免疫调节作用初步研究显示文摘目的:探讨植物乳杆菌KLDS 1.0318对小鼠免疫调节功能的影响。方法:将健康的BALB/c小鼠随机分为4组,即正常对照组、乳酸菌低剂量组、乳酸菌中剂量组、乳酸菌高剂量组。灌胃不同剂量植物乳杆菌KLDS 1.0318菌悬液后,分别测定各组脾脏指数和胸腺指数,脾淋巴细胞增殖、NK细胞活性、巨噬细胞能量代谢水平,巨噬细胞吞噬能力。结果:与正常对照组相比,植物乳杆菌KLDS 1.0318中、高剂量组能够显著提高小鼠的脾脏和胸腺指数,同时能够促进脾淋巴细胞增殖,增强小鼠NK细胞活性,提高小鼠巨噬细胞吞噬中性红能力及其能量代谢水平。结论:植物乳杆菌KLDS 1.0318可以通过促进机体的特异性免疫和非特异性免疫功能来增强机体的免疫作用。蒙月月 sathi Chowdhury shuvan kumar sarker 霍贵成 2018食品工业科技2018,39,7:8
5Field performance of alternate wetting and drying furrow irrigation on tomato crop growth, yield, water use efficiency, quality and profitability显示文摘Sustainable irrigation method is now essential for adaptation and adoption in the areas where water resources are limited. Therefore, a field experiment was conducted to test the performance of alternate wetting and drying furrow irrigation(AWDFI) on crop growth, yield, water use efficiency(WUE), fruit quality and profitability analysis of tomato. The experiment was laid out in randomized complete block design with six treatments replicated thrice during the dry seasons of 2013-2014 and 2014-2015. Irrigation water was applied through three ways of furrow: AWDFI, fixed wetting and drying furrow irrigation(FWDFI) and traditional(every) furrow irrigation(TFI). Each irrigation method was divided into two levels: irrigation up to 100 and 80% field capacity(FC). Results showed that plant biomass(dry matter) and marketable fruit yield of tomato did not differ significantly between the treatments of AWDFI and TFI, but significant difference was observed in AWDFI and in TFI compared to FWDFI at same irrigation level. AWDFI saved irrigation water by 35 to 38% for the irrigation levels up to 80 and 100% FC, compared to the TFI, respectively. AWDFI improved WUE by around 37 to 40% compared to TFI when irrigated with 100 and 80% FC, respectively. Fruit quality(total soluble solids and pulp) was found greater in AWDFI than in TFI. Net return from AWDFI technique was found nearly similar compared to TFI and more than FWDFI. The benefit cost ratio was viewed higher in AWDFI than in TFI and FWDFI by 2.8, 8.7 and 11, 10.4% when irrigation water was applied up to 100 and 80% FC, respectively. Unit production cost was obtained lower in AWDFI compared to TFI and FWDFI. However, AWDFI is a useful water-saving furrow irrigation technique which may resolve as an alternative choice compared with TFI in the areas where available water and supply methods are limited to irrigation.Khokan Kumer Sarker M.A.R.Akanda S.K.Biswas D.K.Roy A.Khatun M.A.Goffar 2016Journal of Integrative Agriculture2016,15,10:6
6Seed Zone Properties and Crop Performance as Affected by Three No-Till Seeders for Permanent Raised Beds in Arid Northwest China显示文摘The no-till seeders of various soil opener configurations have been shown to produce various soil physical responses in relation to soil and climate conditions, thus affecting crop performance in permanent raised beds (PRB) systems. This is particularly important in arid Northwest China where large volumes of residue are retained on the soil surface after harvest. In Zhangye, Gansu Province, China, a field trial assessed the effects of three typical (powered-chopper, powered-cutter and powered-disc) PRB no-till seeders and one traditional seeder on soil disturbance, residue cover index, bulk density, fuel consumption, plant growth, and subsequent yield. In general, seedbed conditions and crop performance for PRB no- till seeders seeded plots were better than for traditional seeded plots. In PRB cropping system, the powered-chopper seeder decreased mean soil disturbance and increased residue cover index compared to powered-disc and -cutter seeders. However, the results indicated that soil bulk density was 2.3-4.8% higher, soil temperature was 0.2-0.6℃ lower, and spring wheat emergence was 3.2-4.7% less. This was attributed to greater levels of residue cover and firmer seedbeds. Spring maize and wheat performance in the powered-cutter and -disc treatments was better (non-significant) than powered-chopper treatment. So powered disc no-till seeder, which generally provided the best planting condition and the highest yield, appeared to be the suitable seeder in heavy residue cover conditions. Considering the precision requirements for soil disturbance and residue cover, the powered strip-chopping no-till seeder could be a suitable option for PRB cropping system in Northwest China. Although these results are preliminary, they are still valuable for the design and selection of no-till seeders for PRB cropping systems in arid Northwest China.HE Jin LI Hong-wen Allen David McHugh WANG Qing-jie LI Hui Rabi Gautam Rasaily Khokan Kumer Sarker 2012Journal of Integrative Agriculture2012,11,10:5
7In vitro α-amylase inhibitory activity and in vivo hypoglycemic effect of methanol extract of Citrus macroptera Montr.fruit显示文摘Objective:To investigate the therapeutic effects of methanol extract of Citrus macroptera Montr,fruit inα-amylase inhibitory activity(in vitro)and hypoglycemic activity in normal and glucose induced hyperglycemic rats(in vivo).Methods:Fruits of Citrus macroptera without rind was extracted with pure methanol following cold extraction and tested for presence of phytochemical constituents,α-amylase inhibitory activity,and hypoglycemic effect in normal rats and glucose induced hyperglycemic rats.Results:Presence of saponin,steroid and terpenoid were identified in the extract.The results showed that fruit extract had moderateα-amylase inhibitory activity[IC_(50)value=(3.638±0.190)mg/mL]as compared to acarbose.Moreover at 500 mg/kg and 1000 mg/kg doses fruit extract significantly(P<0.05 and P<0.01 respectively)reduced fasting blood glucose level in normal rats as compared to glibenclamide(5 mg/kg).In oral glucose tolerance test,500 mg/kg dose significantly reduced blood glucose level(P<0.05)at 2 h but 1000 mg/kg dose significantly reduced blood glucose level at 2 h and 3 h(P<0.05 and P<0.01 respectively)whereas glibenclamide(5 mg/kg)significantly reduced glucose level at every hour after administration.Overall time effect is also considered extremely significant with F value=23.83 and P value=0.0001 in oral glucose tolerance test.Conclusion:These findings suggest that the plant may be a potential source for the development of new oral hypoglycemic agent.Nizam Uddin Rakib Hasan Monir Hossain Arjyabrata Sarker A.H.M.Nazmul Hasan A.F.M.Mahmudul Islam Mohd.Motaher H.Chowdhury Sohel Rana 2014Asian Pacific Journal of Tropical Biomedicine2014,4,6:4
8Source identification, contamination status and health risk assessment of heavy metals from road dusts in Dhaka, Bangladesh显示文摘In this study, concentrations of Cr, Mn, Ni, Cu, Zn, Cd and Pb were determined in road dusts collected from different locations in Dhaka to assess source, contamination status and health risk. Energy-dispersive X-ray fluorescence spectroscopy and energy-dispersive X-ray spectroscopy were used to determine Cr, Mn, Ni, Cu, Zn, Cd and Pb and their mean concentrations were 162.27 ± 29.46, 721.18 ± 180.14, 35.65 ± 12.55, 104.56 ± 128.33, 515.32 ± 321.90,BDL, and 342.82 ± 591.20 mg/kg, respectively. Among the heavy metals, highest concentrations of Cu, Zn and Pb were found at urban sites-7(municipal waste dumping) and 8(medical waste incineration). Highest concentration of Cr followed by Cu and Zn was found at site-5(Tejgaon, urban). Principal component analysis revealed that anthropogenic activities are the potential sources for Cr, Ni, Cu, Zn and Pb while earth crust for Mn. Pollution index and pollution load index results suggested that all the sites were contaminated and/or degraded by Cr, Cu, Zn and Pb except sites-9(urban), 10(sub-urban), 11(rural) while sites-7 and 8(urban) were extremely degraded. For noncarcinogenic health risk, hazard quotient values for dermal were higher compared to that of inhalation/ingestion. Though hazard index values were less than 1 at all the sites, these were at least one order of magnitude higher for children group than that of adult group, thus the children group may face more noncarcinogenic health risk at sites -7 and 8. Values of incremental lifetime cancer risk were from 10to 10showed no carcinogenic health risk by road dusts contaminated with the heavy metals.Aklima Nargis Ahsan Habib Md Nazrul Islam Kai Chen Md Shafiqul Islam Sarker A N M Al-Razee Wenbin Liu Guorui Liu Minggang Cai 2022Journal of Environmental Sciences2022,34,11:3
9Over-the-scope clip-assisted method for resection of full-thickness submucosal lesions of the gastrointestinal tract显示文摘Shabnam Sarker Juan Gutierrez Leona Council Jason Brazelton Kondal Kyanam Kabir Baig Klaus M?nkemüller 2014Endoscopy2014,,:3
10Efficiency of the GSM-GPRS air interface for real-time IP traffic flows with and without packet dropping显示文摘Jahangir H Sarker Seppo J Halme 2002Wireless Personal Communications2002,21,:2
11A review of the alumina recovery from coal fly ash, with a focus in China显示文摘Z.T. Yao M.S. Xia P.K. Sarker T. Chen 2014Fuel2014,,:2
12五株嗜热链球菌抗药性研究显示文摘采用药敏纸片法研究了五株高产粘嗜热链球菌(KLDS3.1012、KLDS3.1014、KLDS-SM、KLDS3.0206、KLDS3.0207)对15种抗生素的敏感性,结果发现,KLDS3.1014对两种抗生素有抗性,KLDS3.1012、KLDS-SM、KLDS3.0206对3种抗生素有抗性,KLDS3.0207则表现出多重抗药性。对五株嗜热链球菌耐四环素基因(tet M,tet S,tet L)、耐红霉素基因(erm A,erm B,msr A/B)和耐氯霉素基因(cat)的初步研究表明,四环素耐受基因、红霉素耐受基因以及氯霉素耐受基因不位于基因组DNA上,同时,受试菌株均无质粒,因此可以初步判断受试菌株抗药性不会进行传递。张丹青 李婉 丁秀云 Shuvan Kumar Sarker 霍贵成 2016食品工业科技2016,37,10:2
13Band tillage with fertilizer application for unpuddled transplanting rice in northeast of China显示文摘Many technological innovations have been developed in agriculture for rice cultivation.Farmers still rely on intensive soil tillage,broadcasting fertilizer,excess irrigation water and labor for rice production.Rice cultivation under unpuddled condition in band-tillage(BT)is a new alternative rice cultivation system in the regions where rainfall,fresh water resources,fertilizers and labors are limited.Therefore,the concept of inter-row BT(T-shaped)with row fertilizer application in soils for unpuddled transplanted rice cultivation(T1)was carried out at Fangzheng,Harbin in the northeast of China.The improved system(T1)was compared with traditional practices(T2)in randomized complete block design with three replications.T2 was done with removal of crop residue,full tillage,broadcasting fertilizer and puddled soils by using the conventional machine.Test results showed that all parameters were satisfied and met the requirements of agronomic performances.The variations of fertilizing stability and evenness were 1.84%and 1.72%,respectively.Soil cone penetration resistance was less in T1 than T2 after tillage.Irrigation water was saved by 26.3%in treatment T1 as compared with T2 for wet land preparation,and wet soil resistance depth had no significant difference.Planting depth was significantly different between the treatments which was affected by intensive tillage and puddling in T2 as compared with T1.Soil temperature was nearly similar,but comparatively 0.23°C(on average)higher than traditional system throughout the crop growing season.Crop growth rate and grain yield increased by 8.5%and 5.3%,respectively in band till with fertilizer placed compared to conventional practices of puddled transplanting.The unit production cost(¥/kg of grain yield)was found lower by 12.3%in treatment T1 than T2.The output-input ratio was marginally greater in treatment T1;1.51)as compared to T2;1.32).Short-term findings suggest that inter-row BT system with row fertilizer application could be used in unpuddled rice farming system instead of traditional puddled rice cultivation.Khokan Kumer Sarker Xu Chunlin Wang Xiaoyan Li Minjin Li Lianhao Liu Guiming 2016International Journal of Agricultural and Biological Engineering2016,9,4:2
14Feeding Effect of Triticale Fodder as Replacement of Straw on Production Performance of Dairy Cows显示文摘Nathu Ram Sarker Mohammad Asaduzzaman Khan Shahidul Huque Mohammad Toyebur Rahman NazrulIslam Mohammad Enamul Haque Stephen R. Waadington 2013Journal of Agricultural Science and Technology(A)2013,3,1:2
15Nexus between foreign direct investment and economic growth in Bangladesh: an augmented autoregressive distributed lag bounds testing approach显示文摘The relationship between foreign direct investment(FDI)inflows and economic growth in host countries is a heavily debated issue.Although some studies have found evidence of the positive impact of FDI on economic growth,others have revealed the opposite result.Studies that examined the causality between FDI and gross domestic product(GDP)also have found evidence of unidirectional causality and,in some cases,a bidirectional causality.This study investigated the causal nexus between FDI and GDP in Bangladesh by employing standard time-series econometric tools,namely,augmented Dickey-Fuller,augmented Dickey-Fuller generalized least square,Kwiatkowski-Phillips-Schmidt-Shin,and Lee-Strazicich unit root tests to check stationarity,augmented autoregressive distributed lag(augmented ARDL)bounds testing approach to check cointegration,and Granger causality to explore the direction of causality.The augmented ARDL model found a long-run relationship between FDI and GDP.In addition,the error correction model and Granger causality results indicated the presence of a unidirectional causality running from GDP to FDI.Bibhuti Sarker Farid Khan 2020Financial Innovation2020,6,1:2
16Endoscopic third ventriculostomy in children:problems and surgical outcome:analysis of 34 cases显示文摘Background:Endoscopic third ventriculostomy(ETV)has been established as a viable treatment option for obstructive hydrocephalus of children over 6 weeks of age.ETV in pediatric groups may be unsuccessful due to the failure of absorption of cerebrospinal fluid(CSF)or reclosure of ventriculostomy stoma or due to infection.The exact cause is still debatable.Some issues like failure to eliminate the second membrane during the procedure or formation of the new arachnoid membrane at the stoma are still not clear.This study aims to assess the surgical failure of ETV and its predisposing factors.Methods:Thirty-four pediatric patients with hydrocephalus were analyzed retrospectively.The patients’age limit was between 2.5 months and 14 years.This is a retrospective study of 34 patients in a single private hospital between June 2012 and January 2018.Patients having hydrocephalus in pediatric groups more than 6 weeks of age were included in the study.Results:The mean age of all patients was 51.25±53.90 months and the mean follow-up period was 50.47±20.84 months.Of 34 surgeries,the success rate was 79%and the failure rate was 21%.Within 2 years,the success rate was 68.42%and above 2 years’success rate was 93.33%.In this series,7 cases of ETV were re-explored and found ventriculostomy stoma closure in 3 cases,the presence of the second membrane in re-exploration 2 cases,and presence of inflammatory arachnoid membrane in re-exploration 2 cases.The use of dexamethasone around the stoma in inflammatory stoma was useful,having no recurrence.In one patient of the second membrane probably due to absorption failure in communicating hydrocephalus re-exploration was failed and was managed successfully with VP shunt.Conclusions:Predisposing factors causing ETV failure are ventriculostomy stoma closure by new arachnoid granulation tissues,remnants of the second membrane inside the stoma,CSF absorption failure,infection/high protein in CSF and inappropriate patient selection.Md Moshiur Rahman S.I.M.Khairun Nabi Khan Robert Ahmed Khan Rokibul Islam Mainul Haque Sarker 2021Chinese Neurosurgical Journal2021,7,2:2
17To ‘gram or not’? Indications for intraopertive cholangiogram显示文摘Lawrence E. Tabone Sharfi Sarker Piero M. Fisichella Molly Conlon Emil Fernando Sophia Yi Fred A. Luchette 2011Surgery2011,,4:2
18SHEAR STRESS FOR INITIATION OF MOTION OF NON-UNIFORM SEDIMENT MIXTURES显示文摘Experiments on initiation of motion of different fractions of non-uniform sediment mixtures are reported. Four sediment mixes and reference transport method to define the threshold of bed particle movement are used in this analysis. Factors controlling the initiation of motion are analyzed. It is found that relative size of different grains with respect to a median size greatly affects the initiation of movement. The incipient motion of non-uniform sediment is very much dependent on the absolute size for coarser fractions. Considering the factors controlling the initiation of motion the experimental data sets along with the other available data yield a new relationship for the calculation of critical shear stress of non-uniform sediments. A set of equations have found that all the data points fall into a single line for the finer and for coarser fractions.Liton Kumar SARKER M. Monowar HOSSAIN M. Anisul HAQUE 2007International Journal of Sediment Research2007,22,3:2
19孟加拉的非木材林产品在美容业的应用(英文)显示文摘在查阅大量非木材林产品文献的基础上,作者总结了非木材林产品在孟加拉美容业的应用情况。本文评述了孟加拉的非木材产品在身体,面部和头发等的美容方面的应用,并对可用于美容产品的非木材树种进行归纳总结。本研究可以作为美容产品应用的可持续发展的原则指导生物多样性的保护。为了更有效的管理这些资源,了解产品的利用和收获的模式是非常必要的。表13参23。Sayma Akhter Md. Abdul Halim Md. Shawkat Islam Sohel Swapan Kumar Sarker Mohammad Shaheed Hossain Chowdhury Sanjay Saha Sonet 2008Journal of Forestry Research2008,19,1:2
20Photoinduced electron-transfer reaction: highly efficient cleavage of tertiary amines显示文摘 Kaneko Y Neckers D C J Phys Chem A0,102,:1
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