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Antitumor activity of Aponogeton undulatus against Ehrilich ascites carcinoma in Swiss albino mice

Asian Pacific Journal of Tropical Medicine 2015年第6期8卷 431-438页

作者： md Reyazul Islam md BadrulAlam UmmeTamima Shayla Islam Jenny Department of Bioactive Materials Science Chonbuk National University567Baekje-daeroDeokjin-guJeonju-siJeollabuk-doRepublic of Korea Graduate School of Food Science & Biotechnology Kyungpook National University 80Daehak-raBuk-guDaeguRepublic of Korea Department of Pharmacy Atishlipankar University of Science & Technology College of Pharmacy Seoul National UniversityI Guanak-roGuanak-guSeoulRepublic of Korea

Objective:To investigate in vitro antioxidant and in vivo antitumor activity of the crude methanolic extract of Aponogeton undulatus(MAU) along with its various organic ***:Aponogeton undulatus leaves were successively extracted using methanol(MAU)and then fractionated by chloroform,ethyl acetate(EAU) and *** total antioxidant capacity,lipid peroxidation inhibition assay.1.1-diphenyl-2-picrylhydrazyl(DPPH) free radical scavenging assay and ferrous reducing power assessment were used to evaluate the antioxidant potential of the crude extract and its organic *** in vivo antitumor activity is evaluated against Ehrlich ascites carcinoma(EAC) cell bearing in Swiss albino ***:EAU showed the highest antioxidant capacity as(175.80±0.41)mg/g,IC_(50)value of DPPH scavenging activity was(38.84±0.02)μg/mL and also exhibited maximum lipid peroxidation inhibition activity with the IC_(50) value of(42.52±0.32)μg/mL than other *** results demonstrate that reducing power of the extract was concentration *** addition,EAU was administered at 50.100 and 200 mg/kg body weight respectively to EAC cell bearing mice and a significant(P<0.05)decrease in tumor volume,packed cell volume and viable cell count and also increased the life span(17.52% .42.53% and 62.05% ).Hematological profiles were restored to normal levels in MAU treated mice as compared to EAC control ***:The results were found to be significant and confirmed that the Aponogeton undulatus has remarkable antitumor activity with antioxidant potential.

关键词： Antioxidant Antitumor Ehrlich ascites carcinoma Aponogeton undulatus

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Leveraging Sharding-Based Hybrid Consensus for Blockchain

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Computers, Materials & Continua 2024年第10期81卷 1215-1233页

作者： Hind Baageel md Mahfuzur Rahman Department of Information&Computer Science King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia Interdisciplinary Research Center(IRC)for Intelligent Secure Systems King Fahd University of Petroleum&MineralsDhahran31261Saudi Arabia

The advent of blockchain technology has transformed traditional methods of information exchange,shifting reliance from centralized data centers to decentralized *** blockchain’s decentralization and security are strengths,traditional consensus mechanisms like Proof of Work(PoW)and Proof of Stake(PoS)face limitations in *** achieves decentralization and security but struggles with scalability as transaction volumes grow,while PoS enhances scalability,but risks centralization due to monopolization by high-stake ***,a recent advancement in blockchain technology,addresses scalability by partitioning the network into shards that process transactions independently,thereby improving throughput and reducing ***,cross-shard communication,essential for transactions involving multiple shards,introduces challenges in coordination and fault *** research introduces a shard-based hybrid consensus model,PoSW,which combines PoW and PoS to mitigate the limitations of both *** integrating PoW’s fairness with PoS’s scalability in a shard-based blockchain,the proposed model addresses key issues of scalability and *** evaluate the model against state-of-the-art consensus algorithms,including Monoxide and Practical Byzantine Fault Tolerance(PBFT).The results show that the proposed PoSW model reduces communication overhead compared to PBFT and improves resource utilization over *** addition to performance gains,the security analysis demonstrates that the PoSW model provides robust defense against common blockchain attacks such as the 51%and Sybil attacks,*** proposed approach is particularly suited for applications like decentralized finance(DeFi)and supply chain management,which require both high scalability and robust *** contributions of this research include the development of the PoSW hybrid consensus mechanism,its comparative evaluation with leading algorithms,and a thorough

关键词： Blockchain consensus algorithm decentralized network

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Approach for Grid Connected PV Management:Advance Solar Prediction and Enhancement of Voltage Stability Margin Using FACTS Device

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Journal of Electronic Science and Technology 2020年第4期18卷 367-377页

作者： md.Masum Howlader Mohammad Rokonuzzaman md Tanbhir Hoq Aziz Un Nur Ibn Saif md Shahrukh Adnan Khan Mahfuj Howlader Department of Electrical and Electronic Engineering University of Asia PacificDhaka 1205 Tyndall National Institute University College CorkCork T12 K8AF School of Science and Engineering Canadian University of BangladesDhaka 1212 Department of Computer Science and Engineering University of DhakaDhaka 1000

The uncertainty in solar energy is different from conventional,dispatchable generation fuels and difficult to incorporate into the standard system operating *** the first part of this work,the machine learning algorithm is used to train models based on solar irradiance data and different meteorological weather information to predict the solar irradiance for different cities to validate the forecasting ***,the intermittent and inertialess nature of photovoltaic(PV)systems can produce significant power oscillations that can cause significant problems with dynamic stability of the power system and also limit the penetration capacity of PV into the *** the second part,it is shown that the residue-based power oscillation damping(POD)controller obviously improves the inter-area oscillation *** validity and effectiveness of the proposed controller are demonstrated on the three-machine two-area test system that combines the conventional synchronous generator and flexible alternating current transmission systems(FACTS)device using *** report overall puts an in-depth analysis with regard to the challenges of solar resources with integrating,planning,operating,and particularly the stability of the rest of the power grid,including existing generation resources,customer requirements,and the transmission system itself that will lead to an improved decision making in resource allocations and grid stability.

关键词： Renewable energy(RE) support vector regression thyristor controlled series capacitor

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Productivity comparison of radial lateral wells and horizontal snake wells applied to marine gas hydrate reservoir development

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Petroleum 2021年第4期7卷 407-413页

作者： md Nahin Mahmood Boyun Guo Department of Petroleum and Mining Engineering Chittagong University of Engineering&TechnologyChattogram4349Bangladesh Department of Petroleum Engineering University of LouisianaLafayetteLA70504USA

Development of marine gas hydrate resources presents a huge challenge to the energy industry owing to the well production complications such as wellbore collapse,sand production,and low *** lateral wells(RLW)and horizontal snake wells(HSW)have been proposed separately to mitigate these *** compare the productivity potentials of these two types of wells using the recently developed analytical models and field case data from a gas hydrate reservoir in the South China *** is concluded that RLW will yield slightly higher gas productivity than HSW under similar con*** analysis with the well models indicates that the productivity of RLW is directly proportional to the number of laterals,length of laterals,and radius of laterals,while the productivity of HSW is directly proportional to the length and radius of the horizontal *** decision of using RLW or HSW can be made based on economic analysis of well completion and production,which should be addressed in future studies.

关键词： Natural gas hydrate Radial lateral wells Horizontal snake wells Productivity

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Mechanical and metallurgical properties of friction stir welded dissimilar joints of AZ91 magnesium alloy and AA 6082-T6 aluminium alloy

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Journal of Magnesium and Alloys 2019年第2期7卷 264-271页

作者： Sameer md Anil Kumar Birru National Institute of Technology ImphalManipurIndia

In the present research work,AZ91 magnesium alloy and AA6082-T6 aluminium alloy were joined by friction stir welding *** comparison of microstructure and mechanical properties between different joints by varying the different materials on advance and retreating sides were mainly *** different welds have been prepared to find the material mixing between the similar and dissimilar *** joint interfaces of the welds have been investigated by employing an optical microscope and scanning electron *** Mg was placed on advancing side(AS),more aluminium content was soluble in nugget zone than the case where Mg was placed on the retreating side(RS).Thin intermetallic layer in the joint interface of Mg/Al and thick intermetallic layer with poor adhesion of the aluminium and magnesium have been observed in the dissimilar joints varying the *** highest UTS of 172.3 MPa was found for Mg-Al when Mg was placed on AS and lower UTS of 156.25 MPa was obtained when Mg was placed on *** of 86 Hv and 89 Hv were observed in the Stir zone for the dissimilar AZ91 Mg alloy and AA6082-T6 Al alloy when AZ91Mg alloy was placed on the AS and on the RS *** was also carried out to find the mode of failure.

关键词： Friction stir welding Magnesium alloy Aluminium alloy Microstructure Mechanical properties

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Characterization of ^(68)Zn uptake,translocation,and accumulation into developing grains and young leaves of high Zn-density rice genotype

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第5期12卷 408-418页

作者： md.Jahidul Islam SHOHAG MOE Key Lab of Environmental Remediation and Ecosystem Health College of Environmental and Resource SciencesZhejiang University

Zinc(Zn) is an essential micronutrient for humans,but Zn deficiency has become serious as equally as iron(Fe) and vitamin A deficiencies *** and breeding of high Zn-density crops is a suitable,cost-effective,and sustainable way to improve human ***,the mechanism of high Zn density in rice grain is not fully understood,especially how Zn transports from soil to *** experiments were carried out to compare Zn uptake and distribution in two different Zn-density rice genotypes using stable isotope *** seedling stage,IR68144 showed higher 68Zn uptake and transport rate to the shoot for the short-term,but no signifi-cant difference was observed in both genotypes for the *** in xylem sap of IR68144 was consistently higher,and IR68144 exhibited higher Zn absorption ratio than IR64 at sufficient(2.0 μmol/L) or surplus(8.0 μmol/L) Zn supply ***64 and IR68144 showed similar patterns of 68Zn accumulation in new leaves at seedling stage and in de-veloping grains at ripening stage,whereas 68Zn in new leaves and grains of IR68144 was consistently *** results suggested that a rapid root-to-shoot translocation and enhanced xylem loading capacity may be the crucial processes for high Zn density in rice grains.

关键词： Zinc Stable isotope High Zn-density rice genotype Translocation Remobilization

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The Dauki Fault at the Shillong Plateau-Bengal Basin Boundary in Northeastern India:2D Finite Element Modeling

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Journal of Earth Science 2012年第6期23卷 854-863页

作者： md Shofiqul Islam Ryuichi Shinjo Faculty of Science University of the RyukyusOkinawa 903-0213Japan Department of Petroleum and Mining Engineering Shahjalal University of Science and TechnologySylhet 3114Bangladesh

The Dauki fault is a major fault along the southern boundary of the Shillong plateau that may be a source of destructive seismic hazards for the adjoining areas, including northeastern Bangladesh. In this study, we simulated the present stress distribution and the ongoing convergence deformation within the study area using numerical simulation. This simulation attempts to deter- mine the proper dip angle of the Dauki fault from a variety of differently established models but with the same realistic boundary conditions. The simulated stress field helped to predict the type of tec- tonic environment and the faulting patterns of the study area. The best-fit model can account for the compressive stress regime in the study area, except in the uppermost part of the Shillong plateau, the Bengal basin, and Assam areas where extensional stress regimes exists. In the model, the elements for which Mohr-Coulomb＇s failure occurs correspond with the observed earthquake data that refer to the Dauki fault as a north-dipping thrust fault.

关键词： Dauki fault Bengal basin tectonic stress earthquake.

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Typhoon parameter sensitivity of storm surge in the semi-enclosed Tokyo Bay

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Frontiers of Earth Science 2020年第3期14卷 553-567页

作者： md.Rezuanul Islam Hiroshi Takagi School of Environment and Society Tokyo Institute of TechnologyTokyo152-8550Japan

In this study,a storm surge model of the semi-enclosed Tokyo Bay was constructed to investigate its hydrodynamic response to major typhoon parameters,such as the point of landfall,approach angle,forward speed,size,and *** typhoon simulation was validated for Typhoon Lan in 2017,and 31 hypothetical storm surge scenarios were generated to establish the sensitivity of peak surge height to the variation in typhoon *** maximum storm surge height in the upper bay adjacent to the Tokyo Metropolitan Area was found to be highly sensitive to the forward speed and size of the passing ***,the importance of these parameters in disaster risk reduction has been largely overlooked by researchers and disaster *** was also determined that of the many hypothetical typhoon tracks evaluated,the slow passage of a large and intense typhoon transiting parallel to the longitudinal axis of Tokyo Bay,making landfall 25 km southwest,is most likely to cause a hazardous storm surge scenario in the upper-bay *** results of this study are expected to be useful to disaster managers for advanced preparation against destructive storm surges.

关键词： storm surge risk semi-enclosed bay typhoon parameters parametric study Typhoon Lan

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Implementation of Efficient B2G and V2G in Practical Cases

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Journal of Electronic Science and Technology 2018年第4期16卷 325-340页

作者： md Shahrukh Adnan Khan Kazi Mahtab Kadir md.Ibrahim Ibne Alam md.Khairul Alam Jianhui Wong Aseef Iqbal University of Asia Pacific Dhaka 1205 Bangladesh Department of Electrical and Electronic Engineering Universiti Tunku Abdul Rahman Kampar 31900Malaysia Chittagong Independent University Chittagong Bangladesh

In this paper, building to grid(B2G) and vehicle to grid(V2G) have been defined with clear and practical understanding. Both of them are new generation technologies which are the essential part of smart city living and crowd energy clustering. Firstly, an in-detailed overview has been provided with an introduction to B2G and V2G followed by a historical overview and theoretical analysis in respect to smart city planning. Next, a review is conducted on current and previous smart living research, which deals with B2G and V2G. Efficient B2G and V2G implementations in practical cases then have been discussed. Lastly, both of these technical prospects have been analyzed in crowd energy diagram.

关键词： Building to grid(B2G) crowd energy practical implementation smart city living vehicle to grid(V2G)

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High efficiency CZTSSe solar cells enabled by dual Ag-passivation approach via aqueous solution process

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Journal of Energy Chemistry 2023年第2期77卷 239-246,I0007页

作者： Temujin Enkhbat Enkhjargal Enkhbayar Namuundari Otgontamir md Hamim Sharif md Salahuddin Mina Seong Yeon Kim JunHo Kim Department of Physics Incheon National UniversityIncheon 22012Republic of Korea Research Center for Thin Film Solar Cells Daegu-Gyeongbuk Institute of Science and Technology(DGIST)Daegu 42988Republic of Korea Global Energy Research Center for Carbon Neutrality Incheon National UniversityIncheon 22012Republic of Korea

Ag substitution in Cu_(2)ZnSn(S,Se)_(4)(CZTSSe)is a promising way to mitigate Cu/Zn related defects,electrostatic fluctuations and Shockley-Read-Hall(SRH)recombination ***,high performance ACZTSSe solar cells are generally demonstrated with more Ag amounts and strenuous fabrication processes,which are not ideal when using cheap constituent materials *** reduce the Ag amount(2%-3%),local Ag substitutions into CZTSSe at front(F),back(B)and dual front/back(FB)were *** results revealed that F-passivation effectively reduced the Cu/Zn related defects and further limits the interface/bulk recombination whereas B-passivation improved the grain growth at the back interface and further allows enhanced transport of charge *** employing the dual Agpassivation approach,the final ACZTSSe device parameters were significantly improved and remarkable power conversion efficiency(PCE)of 12.43%was achieved with eco-friendly aqueous solution process.

关键词： Ag-doped CZTSSe Dual surface passivation Defect passivation Aqueous spray deposition

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