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Carbon Energy 2024年第7期6卷 134-149页

作者： md.selim arif sher shah Hyeonjung Jung Vinod K.Paidi Kug-Seung Lee Jeong Woo Han Jong Hyeok Park Department of Chemical and Biomolecular Engineering Yonsei UniversitySeoulRepublic of Korea Department of Chemistry University of North BengalRaja RammohunpurDarjeelingWest BengalIndia Department of Materials Science and Engineering Research Institute of Advanced MaterialsSeoul National UniversitySeoulRepublic of Korea Pohang Accelerator Laboratory Beamline DivisionPohangRepublic of Korea European Synchrotron Radiation Facility France

Mo_(2)C is an excellent electrocatalyst for hydrogen evolution reaction(HER).However,Mo_(2)C is a poor electrocatalyst for oxygen evolution reaction(OER).Herein,two different elements,namely Co and Fe,are incorporated in Mo_(2)C that,therefore,has a finely tuned electronic structure,which is not achievable by incorporation of any one of the ***,the resulting electrocatalyst Co_(0.8)Fe_(0.2)-Mo_(2)C-80 displayed excellent OER catalytic performance,which is evidenced by a low overpotential of 214.0(and 246.5)mV to attain a current density of 10(and 50)mA cm^(-2),an ultralow Tafel slope of 38.4 mV dec^(-1),and longterm stability in alkaline *** data demonstrates that Co_(0.8)Fe_(0.2)-Mo_(2)C-80 requires the lowest overpotential(1.00 V)for OER and Co centers to be the active *** ultrahigh catalytic performance of the electrocatalyst is attributed to the excellent intrinsic catalytic activity due to high Brunauer-Emmett-Teller specific surface area,large electrochemically active surface area,small Tafel slope,and low chargetransfer resistance.

关键词： fine-tuning electronic structures heteronanostructures Mo_(2)C multimetal(Co/Fe) oxygen evolution reaction

Acute Lymphoblastic Leukemia Presenting as Systemic Juvenile Idiopathic Arthritis: Experience from Bangladesh

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Open Journal of Rheumatology and Autoimmune Diseases 2024年第1期14卷 1-12页

作者： Manik Kumar Talukder Kamrul Laila md. arif Hossain md. Shafiqul Islam md. Zahidul Islam Kalyan Benjamin Gomes Mujammel Haque md. Mahbubul Islam md. Imnul Islam Department of Paediatrics Bangabandhu Sheikh Mujib Medical University Dhaka Bangladesh Health Services Dhaka Bangladesh NICVD Dhaka Bangladesh

Background: Acute lymphoblastic leukemia (ALL), the most common paediatric malignancy, is a heterogeneous hematologic disease. ALL patients may present with isolated and persistent osteo-articular complaints, lower incidence of hepatomegaly, splenomegaly or lymphadenopathy without clear laboratory features, and misdiagnosed as systemic juvenile idiopathic arthritis (sJIA). Methods: This was a single center cross sectional study over a period of 4 years. Clinic laboratory profiles of 39 ALL children were compared with 39 age and sex-matched sJIA cases. Result: Among 39 ALL patients 89.7% were initially misdiagnosed as sJIA upon clinical presentation. Majority (66.7%) of ALL patients had oligo-articular joint involvement. In sJIA, small joints of the hands were most commonly involved. The total WBC count was significantly higher in ALL patients (p-value 0.0065). CRP and LDH values between the two groups showed significant differences (p-value 0.00006 and 0.00001 respectively). Conclusion: The presentation of leukemia with arthralgia or arthritis makes the diagnosis difficult for the physicians. The diagnosis of sJIA must be made with caution keeping the possibility of haematological malignancy in mind.

关键词： ALL sJIA Arthritis Arthralgia Musculoskeletal

Design and Optimization of Photonic Crystal Fiber for Liquid Sensing Applications

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Photonic Sensors 2016年第3期6卷 279-288页

作者： md. Faizul Huq arif Kawsar AHMED Sayed ASADUZZAMAN md. Abul Kalam AZAD Department of Information and Communication Technology (ICT) Mawlana Bhashani Science and TechnologyUniversity (MBSTU) Tangail-1902 Bangladesh Department of Material and Metallurgical Engineering (MME) Bangladesh University of Engineering and TechnologyUniversity (BUET) Dkaka-l O00 Bangladesh

This paper proposes a hexagonal photonic crystal fiber （H-PCF） structure with high relative sensitivity for liquid sensing; in which both core and cladding are microstructures. Numerical investigation is carried out by employing the full vectorial finite element method （FEM）. The analysis has been done in four stages of the proposed structure. The investigation shows that the proposed structure achieves higher relative sensitivity by increasing the diameter of the innermost ring air holes in the cladding. Moreover, placing a single channel instead of using a group of tiny channels increases the relative sensitivity effectively. Investigating the effects of different parameters, the optimized structure shows significantly higher relative sensitivity with a low confinement loss.

关键词： Photonic crystal fiber (PCF) liquid sensor microstructure core sensitivity confinement loss

Bio-inspired optimization algorithms for optical parameter extraction of dielectric materials: A comparative study

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Chinese Physics B 2016年第10期25卷 202-208页

作者： md Ghulam Saber Kh arif shahriar Ashik Ahmed Rakibul Hasan Sagor Department of Electrical and Electronic Engineering Islamic University of Technology (IUT) Department of Electrical and Electronic Engineering Northern University Bangladesh (NUB)

Particle swarm optimization(PSO) and invasive weed optimization(IWO) algorithms are used for extracting the modeling parameters of materials useful for optics and photonics research community. These two bio-inspired algorithms are used here for the first time in this particular field to the best of our knowledge. The algorithms are used for modeling graphene oxide and the performances of the two are compared. Two objective functions are used for different boundary values. Root mean square(RMS) deviation is determined and compared.

关键词： optical parameter extraction particle swarm optimization invasive weed optimization graphene oxide optimization

Identification of Thoracic Diseases by Exploiting Deep Neural Networks

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Computers, Materials & Continua 2021年第3期66卷 3139-3149页

作者： Saleh Albahli Hafiz Tayyab Rauf Muhammad arif md Tabrez Nafis Abdulelah Algosaibi Department of Information Technology College of ComputerQassim UniversityBuraydahSaudi Arabia Department of Computer Science Univesity of Gurjat52250Pakistan School of Computer Science Guanzghou UniversityGuangzhou510006China Department of Computer Science&Engineering Jamia HamdardNew DelhiIndia Department of Computer Science CCSITKing Faisal UniversitySaudi Arabia

With the increasing demand for doctors in chest related diseases,there is a 15%performance gap every five *** this gap is not filled with effective chest disease detection automation,the healthcare industry may face unfavorable *** are only several studies that targeted X-ray images of cardiothoracic *** of the studies only targeted a single disease,which is *** some related studies have provided an identification framework for all classes,the results are not encouraging due to a lack of data and imbalanced data *** research provides a significant contribution to Generative Adversarial Network(GAN)based synthetic data and four different types of deep learning-based models that provided comparable *** models include a ResNet-152 model with image augmentation with an accuracy of 67%,a ResNet-152 model without image augmentation with an accuracy of 62%,transfer learning with Inception-V3 with an accuracy of 68%,and finally ResNet-152 model with image augmentation but targeted only six classes with an accuracy of 83%.

关键词： GAN CNN chest diseases inception-V3 ResNet152

Determinants of emergency contraceptive pill use in Bangladesh: An analysis of national survey data

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Asian pacific Journal of Reproduction 2022年第2期11卷 62-69页

作者： md.Rahman Mahfuzur md.Rashed Alam md arif Billah Department of Population Science and Human Resource Development University of RajshahiRajshahi 6205Bangladesh Department of Social Work and Counselling Faculty of BusinessEconomic and Social DevelopmentUniversiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia

Objective:To examine the determinants of emergency contraceptive pill use in ***:Data for this cross-sectional study came from 2017-2018 Bangladesh Demographic and Health *** of 906 reproductive age women who were potential candidates for using emergency contraceptive pill were analysed in this *** were analysed using univariate and multivariate *** binary logistic regression was employed as multivariate ***:Only 10.9%candidates were found to ever use emergency contraceptive *** odds of using emergency contraceptive pill for women visited by family planning field worker was significantly higher than that for those who were not visited by family planning field worker[odds ratio(OR)1.94;95%confidence interval(CI)1.19–3.17;P=0.008],while the odds of using emergency contraceptive pill for women with high socioeconomic status was higher than that for those with low socioeconomic status(OR 3.10;95%CI 1.61–5.97;P=0.001).Additionally,having some media access was linked to an increase in the odds of using emergency contraceptive pill(OR 3.01;95%CI 1.33–6.83;P=0.008).Women empowerment related factors did not show any significant effect on emergency contraceptive pill ***:The findings indicate that family planning programme has a great opportunity of playing an important role in increasing emergency contraceptive pill use in Bangladesh by increasing the knowledge and awareness of women about emergency contraceptive pill.

关键词： Emergency contraceptive pill Unintended pregnancy Abortion Bangladesh Demographic and Health Survey Bangladesh

Evaluation of antihepatotoxic potential of Solanum xanthocarpum fruit extract against antitubercular drugs induced hepatopathy in experimental rodents

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Asian Pacific Journal of Tropical Biomedicine 2012年第6期2卷 454-460页

作者： Talib Hussain Ramesh K Gupta Sweety K Mohd Sajid Khan md Sarfaraj Hussain md arif Arshad Hussain md Faiyazuddin Chandana Venkateswara Rao Pharmacognosy and Ethnopharmacology Division National Botanical Research Institute Department of Pharmacology and Toxicology Faculty of Pharmacy Integral University Department of Pharmacology Royal College of Pharmacy and Health Sciences Department of Biotechnology Integral University

Objective:To assess the hepatoprotective effect of Solanum xanthocarpum(S. xanthocarpum) fruit extract against antitubercular drug-induced liver toxicity in experimental ***:Ethanolic(50%) fruit extract ofS. xanthocarpum(100, 200 and 400 mg/kg bw) was administered daily for 35 days in experimental animals. Liver toxicity was induced by combination of three antitubercular drugs [isoniazid(I) 7.5 mg/kg, rifampicin(R) 10 mg/kg and pyrazinamide(P) 35 mg/kg] given orally as suspension for 35 days in rats. The hepatoprotective activity was assessed using various biochemical parameters like aspartate aminotransferase(AST), alanine aminotransferase(ALT), alkaline phosphatise(ALP), total bilirubin(TBL), albumin(ALB), total protein(TP), lactate dehydroginase(LDH), and serum cholesterol(CHL). Meanwhile,in vivoantioxidant activities as lipid peroxidation(LPO), reduced glutathione(GSH), superoxide dismutase(SOD) and catalase(CAT) were measured in rat liver homogenate. The biochemical observations were supplemented by histopathological ***:The results demonstrated that treatment ***(P<0.05-P<0.001) and dose-dependently prevented drug induced increase in serum levels of hepatic enzymes. Furthermore,S. xanthocarpumsignificantly(up toP<0.001) reduced the LPO in the liver tissue and restored activities of defence antioxidant enzymes GSH, SOD and CAT towards normal levels. Histopathology of the liver tissue showed that S. xanthocarpumattenuated the hepatocellular necrosis and led to reduction in inflammatory cells ***:The results of this study strongly indicate the protective effect of S. xanthocarpumagainst liver injury which may be attributed to its hepatoprotective activity, and thereby scientifically support its traditional use.

关键词： Solanum xanthocarpum Rifampicin Isoniazid Pyrazinamide Antioxidant Antihepatotoxicity Hepatoprotective effect Antitubercular drug Liver toxicity Liver injury Biochemical parameter Histopathology

A comparative study of the antioxidant,antimicrobial,cytotoxic and thrombolytic potential of the fruits and leaves of Spondias dulcis

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Asian Pacific Journal of Tropical Biomedicine 2013年第9期3卷 682-691页

作者： shawkat md.Aminul Islam kh Tanvir Ahmed Mohammad Kawsar Manik md.arif Wahid chowdhury shafayat ibne Kamal Department of Pharmacy East West University

Objective:To investigate the antioxidant,antimicrobial,cytotoxic and thrombolytic property of the fruits and leaves of Spondias dulcis（***）.Methods:Methanolic extracts of fruits and leaves of *** were partitioned with chloroform and *** antioxidant potential of the crude extract and partitioned fractions were evaluated in terms of total phenolic content,total flavonoid content,DPPH radical scavenging potential,reducing potential and total antioxidant capacity by specific standard *** antimicrobial activity was evaluated using disc diffusion *** cytotoxicity was evaluated by using brine shrimp lethality bioassay and compared with vincristine *** thrombolytic activity was compared with ***:The methanolic fruit extract exhibited the highest phenolic content,flavonoid content and antioxidant capacity,among the other extracts,with the highest DPPH radical scavenging activity at a concentration of 10μg/mL(IC50:1.91μg/mL)and maximum reducing power at a concentration of 100μg/ml.(EC50:3.58μg/mL).Though all extract showed moderate antimicrobial activity against the bacterial strains,weak or no activity against *** range of LC50value of all extracts was 1.335-14.057μg/mL which was far lower than the cut off index for *** extracts exhibited statistically significant（P<0.001）thrombolytic ***:Our study suggested that *** exhibits antimicrobial activities against a wide variety of strains while it possesses significant antioxidant,cytotoxic and thrombolytic aclivily.

关键词： Spondias dulcis Antioxidant activity Antimicrobial activity Cytotoxic activity Thrombolytic activity DPPH IC_(50) LC_(50

Sustainable Use of Steel Industry Slag (SIS) for Concrete Production: A State Art of Review

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Open Journal of Applied Sciences 2019年第12期9卷 841-850页

作者： md. Muzammel Hoque md. arif Hosse Department of Business Administration Southern University Bangladesh Chattogram Bangladesh Center for Environmental Science & Engineering Research Chittagong University of Engineering & Technology Chattogram Bangladesh

This paper presents a review on the sustainable use of steel industry slag (SIS) in the construction industry for sustainable development. This issue also may contribute significantly to attain the sustainable development goal (SDG). If feasible sector is not determined earlier for the use of SIS for the country like Bangladesh then the unproductive uses will be increased and as well without large-scale utilization, direct dumping of SIS will create environmental hazards. On the other hand, the sustainable use of SIS in concrete production can contribute to the economic growth of the country;in addition, it can also contribute to keeping our natural environment safe from hazardous pollution. Another observation of this study is SIS used in cement and concrete production as aggregate or as additional cementing materials has a long-term strength and durability. Besides, replacement of cement with SIS deferred the hydration reaction at early ages, without any significant troubles. Furthermore, it can also be mentioned that high replacement of SIS with cement may raise a problem of volume instability which can be solved by using ground-granulated blast-furnace slag (GGBS) as combined admixture and the slump problem of concrete mixtures can be adjusted with addition of copper slag or class F fly ash. Feasibility analysis of SIS usage and an awareness program for all the stakeholders may be implemented for the sustainable uses of SIS. Both of these will play a vital role to safeguard environment in addition to economic growth of the country.

关键词： Cement Developing Country Sustainable Development Construction

Anti-inflammatory and antioxidant activities of ethanolic extract of aerial parts of Vernonia patula(Dryand.)Merr.

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Asian Pacific Journal of Tropical Biomedicine 2013年第10期3卷 798-805页

作者： Arpona Hira Shubhra Kanti Dey md.Sariful Islam Howlader arif Ahmed Hemayet Hossain Ismet Ara Jahan Pharmacy Discipline.Life Science School Khulna UniversityKhulna-9208Bangladesh Department of Pharmacy World University of BangladeshDhaka-1205Bangladesh BCSIR Laboratories.Dhaka.Bangladesh Council of Scientific and Industrial Research.Dr.Qudrat-E-Khuda Road Dhaka-1205Bangladesh

Objective:To investigate the inflammatory and antioxidant activities of ethanolie extract of aerial part of Vernonia patula(Dryand.)Merr(EAV).Methods:The anti-inflammatory activity of EAV was studied using carrageenan and histamine-induced rat paw edema test at different doses(100.200 and 400 mg/kg body weight).DPPH free radical scavenging,nitric oxide scavenging,reducing power and Fe^(2+)ion chelating ability were used for determining antioxidant ***:The EAV,at the dose of 400 mg/kg,showed a significant anti-inflammatory activity(P<0.01)both in the carrageenan and histamine-induced oedema test models in rats,showing62.86%and 64.42%reduction in the paw volume comparable to that produced by the standard drug indomethacin(67.26%and 66.01%)at 5 h *** DPPH free radical scavenging test,IC_(50)value for EAV was found fairly significant 36.59μg/mL when compared to the IC_(50)value of the reference standards ascorbic acid 8.97μg/*** IC_(50)values of the extract and ascorbic acid were 47.72 and 12.39μg/mL,respectively in nitric oxide scavenging *** IC_(50)value of the EAV(33.59μg/mL)as percentage of Fe^(2+)ion chelating ability was also found significant compared to that of EDTA(9.16μg/mL).The maximum absorbance for reducing power assay was found to be1.928 at 100μg/mL when compared to 2.449 for standard ascorbic *** total phenolic content was 198.81 mg/g of gallic acid *** toxicity test showed that the plant might be safe for pharmacological uses up to a dose level of 3200 mg/kg of body weight in ***:Therefore,the obtained results suggest the acute anti-inflammatory and antioxidant activities of the EAV and thus provide the scientific basis for the traditional uses of this plant part as a remedy for inflammations.

关键词： Vernonia patula Anti-inflammatory DPPH free-radical scavenging Nitric oxide radical scavenging Reducing power Acute toxicity