检索结果-南通市图书馆

Cellular & Molecular Immunology 2018年第12期15卷 1088-1090页

作者： Mahuya Sengupta Ramkrishna Pal Anupam Nath Biswajit Chakraborty Leichombam Mohindro Singh Biswajit Das sujit kumar ghosh Department of Biotechnology Assam UniversitySilcharAssam 788011India Department of Chemistry Assam UniversitySilcharAssam 788011India

The use of the optoelectronic properties of noble metal nanoparticles has given a new dimension to the realm of cancer diagnosis and therapy(theranostics).The multifunctional catalytic properties and surface plasmon resonance of noble metal nanoparticles(NPs)along with their facile surface chemistry gives them an edge in the field of biology,including for immunotherapeutic *** a previous study,we reported the anticancer efficacy of silver NPs coated with murine serum albumin against fibrosarcoma in an in vivo mouse model,highlighting their role in eliciting oxystress and immune *** addition to addressing the bioavailability and toxicity parameters,our study reported that there was a significant reduction in the size,as well as a delay in the incidence of tumors with AgNP-MSA *** electron micrographs revealed AgNP-MSA uptake by sentinel immune cells associated with the tumor along with the downregulation of pro-tumorigenic inflammatory cytokines,such as TNF-α,IL-6 and IL-1β.

关键词： inflammatory diagnosis cytokine

mmunomodulatory properties of silver nanoparticles ontribute to anticancer strategy for murine fibrosarcoma

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2016年第2期13卷 191-205页

作者： Biswajit Chakraborty Ramkrishna Pal Mohammed Ali Leichombam Mohindro Singh Dewan Shahidur Rahman sujit kumar ghosh Mahuya Sengupta Immunobiology Laboratory Department of Biotechnology Assam University Silchar India Department of Chemistry Assam University Silchar India

The use of nanotechnology in nanoparticle-based cancer therapeutics is gaining impetus due to the unique biophysical properties of nanoparticles at the quantum level. Silver nanoparticles （AgNPs） have been reported as one type of potent therapeutic nanoparticles. The present study is aimed to determine the effect of AgNPs in arresting the growth of a murine fibrosarcoma by a reductive mechanism. Initially, a bioavailability study showed that mouse serum albumin （MSA）-coated AgNPs have enhanced uptake; therefore, toxicity studies of AgNP-MSA at 10 different doses （1-10 mg/kg b.w.） were performed in LACA mice by measuring the complete blood count, lipid profile and histological parameters. The complete blood count, lipid profile and histological parameter results showed that the doses from 2 to 8 mg （IC50： 6.15 mg/kg b.w.） sequentially increased the count of leukocytes, lymphocytes and granulocytes, whereas the 9- and 10-mg doses showed conclusive toxicity. In an antitumor study, the incidence and size of fibrosarcoma were reduced or delayed when murine fibrosarcoma groups were treated by AgNP-MSA. Transmission electron micrographs showed that considerable uptake of AgNP-MSA by the sentinel immune cells associated with tumor tissue and a morphologically buckled structure of the immune cells containing AgNP-MSA. Because the toxicity studies revealed a relationship between AgNPs and immune function, the protumorigenic cytokines TNF-α, IL-6 and IL-1β were also assayed in AgNP-MSA-treated and non-treated fibrosarcoma groups, and these cytokines were found to be downregulated after treatment with AgNP-MSA.

关键词： AgNP-MSA fibrosarcoma IL-1β IL-6 immunomodulation nanoparticles TNF-α

Wind environment around the setback building models

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Building Simulation 2021年第5期14卷 1525-1541页

作者： Amlan kumar Bairagi sujit kumar Dalui Department of Civil Engineering Indian Institute of Engineering Science and TechnologyShibpurHowrahIndia

The irregular shape of buildings always tenders an enormous challenge to the *** wind velocity at the pedestrian level has a specific approach from a comfortable point of *** investigation highlighted the characteristic of the pedestrian level wind velocity for distinct types of asymmetrical setback *** passed study explored the pedestrian level effect for the axisymmetric models,while this study is based on the models that have symmetry about a single *** study investigates the pedestrian level flow fluctuation of setback models with single and double side setbacks at multiple *** double-side double setback buildings are efficient to reduce 28%-30%velocity in front of the building and 68%-70%velocity behind the *** it suggests that the double side double setback building is efficient to maintain the velocity at the pedestrian level,roof level,and backside of the *** setback building can easily control the frequency of fluctuating velocity at downstream flow for both along and across wind conditions.

关键词： amplification factor pedestrian level flow setback model velocity spectra wind environment computational fluid dynamics(CFD)

Effects of side ratio for ‘Y’ plan shaped tall building under wind load

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Building Simulation 2021年第4期14卷 1221-1236页

作者： Prasenjit Sanyal sujit kumar Dalui Department of Civil Engineering Meghnad Saha Institute of TechnologyKolkataIndia Department of Civil Engineering IIESTShibpurHowrahIndia

Wind load and response are the major factors that govern the most critical condition for designing tall buildings. This study discusses the variability of wind load and pressure on a Y plan shaped tall building due to the change in the building side ratio. The length to width ratio is changed keeping the total plan area same. The numerical study is done by ANSYS CFX. Two turbulence models, k-epsilon and shear stress transport (SST), are used for doing the numerical simulation and the results are compared with the previous wind tunnel results in a similar flow condition. Sample points were selected based on Audze–Eglais Uniform Latin Hypercube (AELH) method and the analytical expressions of force, moment and torsional coefficients of Y plan shaped tall building are proposed. These expressions are fitted very well and the AELH method has given a great set of sample points that have significantly decreased the total computational time. The graphical representations of these expressions for various coefficients are presented and discussed. Then pressure distributions on three different models are compared and the pros and cons of higher and lower values of side ratios are discussed.

关键词： computational fluid dynamics AELH sampling method least square polynomial side ratio force coefficient moment coefficient

Interaction behavior and load sharing pattern of piled raft using nonlinear regression and LM algorithm-based artificial neural network

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Frontiers of Structural and Civil Engineering 2021年第5期15卷 1181-1198页

作者： Plaban DEB sujit kumar PAL Department of Civil Engineering G H Raisoni College of Engineering&ManagementPune 412207India Department of Civil Engineering National Institute of TechnologyAgartala 799046India

In the recent era,piled raft foundation(PRF)has been considered an emergent technology for offshore and onshore *** previous studies,there is a lack of illustration regarding the load sharing and interaction behavior which are considered the main intents in the present *** element(FE)models are prepared with various design variables in a double-layer soil system,and the load sharing and interaction factors of piled rafts are *** obtained results are then checked statistically with nonlinear multiple regression(NMR)and artificial neural network(ANN)modeling,and some prediction models are *** models are prepared with Levenberg-Marquardt(LM)algorithm for load sharing and interaction factors through backpropagation *** factor of safety(FS)of PRF is also estimated using the proposed NMR and ANN models,which can be used for developing the design strategy of PRF.

关键词： interaction load sharing ratio piled raft nonlinear regression artificial neural network

维普期刊数据库

Stabilization of expansive soils using chemical additives: A review

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2022年第4期14卷 1319-1342页

作者： Dharmendra Barman sujit kumar Dash Department of Civil Engineering Indian Institute of Technology KharagpurKharagpur721302India

Volume instability of expansive soils due to moisture fluctuations is often disastrous,causing severe damages and distortions in the supported *** is,therefore,necessary to adequately improve the performance of such soils that they can favorably fulfil the post-construction stability *** can be achieved through chemical stabilization using additives such as lime,cement and fly *** this paper,suitability of such additives under various conditions and their mechanisms are reviewed in *** is observed that the stabilization process primarily involves hydration,cation exchange,flocculation and pozzolanic *** degree of stabilization is controlled by several factors such as additive type,additive content,soil type,soil mineralogy,curing period,curing temperature,delay in compaction,pH of soil matrix,and molding water content,including presence of nano-silica,organic matter and sulfate *** of nano-silica not only improves soil packing but also accelerates the pozzolanic ***,presence of deleterious compounds such as sulfate or organic matter can turn the treated soils unfavorable at times even worser than the unstabilized ones.

关键词： Expansive soil Cement Lime Fly ash Pozzolanic reactions Sulfate attack

维普期刊数据库

A Compact Quad-Band Sickle-Shaped Monopole Antenna for GSM 900/WiMax/WLAN Applications

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2022年第10期73卷 397-410页

作者： sujit Goswami sujit kumar Mandal Soumen Banerjee Department of Electronics and Communication Engineering National Institute of TechnologyDurgapur713213West BengalIndia Department of Electronics and Communication Engineering University of Engineering and ManagementNew TownKolkata700156West BengalIndia

In this paper a novel,compact,microstrip-fed,quad-band monopole antenna is presented for the application of Global System for Mobile communication(GSM 900),Worldwide Interoperability for Microwave Access(WiMAX)and Wireless Local Area Network(WLAN).The proposed antenna comprises of a sickle-shaped structure with four circular arc strips,and a modified rectangular ground *** four strips of the antenna are independently responsible for the four different resonant frequencies of the operating bands and can be tuned separately to control the radiation *** proposed quad-band antenna is designed to resonate at 940 MHz for GSM 900,2.5 and 3.5 GHz for WiMAX and 5.85 GHz for WLAN *** the four intended operating bands,the antenna exhibits impedance bandwidth of 60 MHz(905–965MHz),80 MHz(2.45–2.53 GHz),110 MHz(3.48–3.59 GHz)and 2.39 GHz(4.82–7.21 GHz),*** the resonance frequency of the four bands,the gain of the proposed antenna is obtained as 4.2,2.5,1.7 and 1.9 dBi,respectively.A prototype of the designed antenna is fabricated and a good agreement between simulated and measured results is ***,the proposed antenna shows good radiation characteristics and gains at all the four operating bands.

关键词： Antenna gain GSM 900 IEEE 802.11a monopole strips quad-band sickle-shaped WiMAX WLAN

Assessing land transformation and associated degradation of the Indian Ganga River Basin using forest cover land use mapping and residual trend analysis

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Arid Land 2019年第1期11卷 29-42页

作者： Shafique MATIN sujit ghosh Mukunda D BEHERA Centre for Oceans Rivers Atmosphere and Land Sciences Indian Institute of Technology Kharagpur

The Indian Ganga River Basin（IGRB） has experienced continuous land transformation since the Indus Valley Civilisation shifted from the Indus basin to the Ganga basin. Particularly in the last few decades the land transformation has increased many-folds due to the changing climate and rapid increase in population. In this paper, we assessed land transformation and associated degradation in the IGRB based on the forest cover land use（FCLU） mapping and residual trend analysis（RTA）. The FCLU maps for 1975 and 2010 were generated using 216 Landsat satellite images and validated using 1509 ground points. We mapped 29 forest and 18 non-forest types and estimated a total loss of 5571 km2forest cover and expansion in settlement areas（5396 km2）. Other major changes mapped include a decrease in wetlands and water bodies, while an increase in agriculture and barren lands with an overall mapping accuracy of 85.3%（kappa, 0.82） and 88.43%（kappa, 0.84） for 1975 and 2010, respectively. We also performed the RTA analysis using GIMMS-NDVI3 g to identify areas of significant negative vegetative photosynthetic change as an indicator for land degradation. All the RTA models showed monotonic nature of the residual trends and resulted as moderately positive but highly significant（P<0.001）. Land degradation in the form of barren land accompanied by a decline in vegetation quality and coverage was found prominent in the basin with a possibility of an accelerated rate of land degradation in future due to the rapid loss of permanent forest cover.

关键词： land degradation remote sensing NDVI GIMMS Ganga River Basin

Short-term mixed electricity demand and price forecasting using adaptive autoregressive moving average and functional link neural network

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Journal of Modern Power Systems and Clean Energy 2019年第5期7卷 1241-1255页

作者： sujit kumar DASH Pradipta Kishore DASH Siksha O Anusandhan Deemed to be University Bhubaneswar 751030India

A new hybrid adaptive autoregressive moving average(ARMA)and functional link neural network(FLNN)trained by adaptive cubature Kalman filter(ACKF)is presented in this paper for forecasting day-ahead mixed short-term demand and electricity prices in smart *** hybrid forecasting framework is intended to capture the dynamic interaction between the electricity consumers and the forecasted prices resulting in the shift of demand curve in electricity *** proposed model comprises a linear ARMA-FLNN obtained by using a nonlinear expansion of the weighted *** nonlinear functional block helps introduce nonlinearity by expanding the input space to higher dimensional space through basis *** train the ARMA-FLNN,an ACKF is used to obtain faster convergence and higher forecasting *** proposed method is tested on several electricity markets,and the performance metrics such as the mean average percentage error(MAPE)and error variance are compared with other forecasting methods,indicating the improved accuracy of the approach and its suitability for a real-time forecasting.

关键词： Mixed demand and price forecasting Cubature Kalman filter Price spikes Smart grids

维普期刊数据库

Pollen Morphology of Indian Species of Saraca L.(Leguminosae)-A Threatened and Legendary Medicinal Tree

在线全文

学校读者我要写书评

暂无评论

Phyton-International Journal of Experimental Botany 2019年第3期88卷 295-315页

作者： sujit Sil Tanmoy Mallick Tuhin Pal Animesh Mondal Kalyan kumar De Asok ghosh Postgraduate Department of Botany Hooghly Muhammad Mohsin College(Estd.1836)Chinsurah712101HooghlyWest BengalIndia UGC-CAS Department of Botany Taxonomy of Angiosperms and Biosystematics LaboratoryUniversity of BurdwanGolapbagBurdwan713104West BengalIndia

The genus Saraca L.(Leguminosae)is a universal panacea in herbal *** present study investigates the comparative pollen morphology of four species of Saraca ***(Roxb.)de Wilde,***(Jack)Miq.,*** L.,and *** Cantley ex Prain growing in India to reveal differences of their pollen structures to aid taxonomic and evolutionary *** detailed morphology and surface structure of pollen grains were studied and described using light microscopy and scanning electron *** pollen grains of Saraca showed isopolar,para-syncolporate,tricolporate,with radially symmetric,prolate and prolate-spheroidal *** surface of pollen of *** is rugulate with large lirae but in ***,the surface is micro-rugulate to vermiculate with relatively thin lirae and that of *** is indistinct as the psilate surface with a frequent protuberance and fewer perforations were observed along with the gemmae like *** ornamentation helped to separate *** and *** thickness varies from 3-4μ*** of protuberance and exine thickness varies among individuals of the species spread over different *** work also provides a unique palynological identity and interrelationship of these four species based on cluster analysis taking 23 pollen characters with the help of statistical method like the plotting of ternary *** plots also helped to calculate the level of plasticity of each character in the intra-and inter-specific level.

关键词： Cluster analysis palynology SEM study surface ornamentation ternary graph