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191篇 您的检索式:作者名="Amitava"
    题名 作者 年代 出处 被引量
1Atrial fibrillation: the current epidemic显示文摘Carlos A Morillo Amitava Banerjee Pablo Perel David Wood Xavier Jouven 2017Journal of Geriatric Cardiology2017,14,3:7
2Carbon Dioxide and Nitrous Oxide Emissions from Naturally Occurring Sulfate-Based Saline Soils at Different Moisture Contents显示文摘Soil salinization may negatively affect microbial processes related to carbon dioxide(CO_2) and nitrous oxide(N_2O) emissions. A short-term laboratory incubation experiment was conducted to investigate the effects of soil electrical conductivity(EC) and moisture content on CO_2 and N_2O emissions from sulfate-based natural saline soils. Three separate 100-m long transects were established along the salinity gradient on a salt-affected agricultural field at Mooreton, North Dakota, USA. Surface soils were collected from four equally spaced sampling positions within each transect, at the depths of 0–15 and 15–30 cm. In the laboratory, artificial soil cores were formed combining soils from both the depths in each transect, and incubated at 60% and 90% water-filled pore space(WFPS) at 25?C. The measured depth-weighted EC of the saturated paste extract(EC_e) across the sampling positions ranged from 0.43 to 4.65 dS m^(-1). Potential nitrogen(N) mineralization rate and CO_2 emissions decreased with increasing soil EC_e, but the relative decline in soil CO_2 emissions with increasing ECe was smaller at 60% WFPS than at 90% WFPS. At 60% WFPS, soil N_2O emissions decreased from 133 μg N_2O-N kg^(-1) soil at EC_e < 0.50 dS m^(-1) to 72 μg N_2O-N kg^(-1) soil at EC_e = 4.65 dS m^(-1). In contrast, at 90% WFPS,soil N_2O emissions increased from 262 μg N_2O-N kg^(-1) soil at EC_e = 0.81 dS m^(-1) to 849 μg N_2O-N kg^(-1) soil at EC_e = 4.65 dS m^(-1), suggesting that N_2O emissions were linked to both soil ECe and moisture content. Therefore, spatial variability in soil EC_e and pattern of rainfall over the season need to be considered when up-scaling N_2O and CO_2 emissions from field to landscape scales.Resham THAPA Amitava CHATTERJEE Abbey WICK Kirsten BUTCHER 2017Pedosphere2017,27,5:5
3Saline-Sodic Soils:Potential Sources of Nitrous Oxide and Carbon Dioxide Emissions?显示文摘Increasing salt-affected agricultural land due to low precipitation,high surface evaporation,irrigation with saline water,and poor cultural practices has triggered the interest to understand the influence of salt on nitrous oxide(N_2O) and carbon dioxide(CO_2)emissions from soil.Three soils with varying electrical conductivity of saturated paste extract(EC_e)(0.44-7.20 dS m^(-1)) and sodium adsorption ratio of saturated paste extract(SARe)(1.0-27.7),two saline-sodic soils(S2 and S3) and a non-saline,non-sodic soil(S1),were incubated at moisture levels of 40%,60%,and 80%water-filled pore space(WFPS) for 30 d,with or without nitrogen(N)fertilizer addition(urea at 525 μg g^(-1) soil).Evolving CO_2 and N2 O were estimated by analyzing the collected gas samples during the incubation period.Across all moisture and N levels,the cumulative N_2O emissions increased significantly by 39.8%and 42.4%in S2 and S3,respectively,compared to S1.The cumulative CO_2 emission from the three soils did not differ significantly as a result of the complex interactions of salinity and sodicity.Moisture had no significant effect on N_2O emissions,but cumulative CO_2 emissions increased significantly with an increase in moisture.Addition of N significantly increased cumulative N_2O and CO_2 emissions.These showed that saline-sodic soils can be a significant contributor of N_2O to the environment compared to non-saline,non-sodic soils.The application of N fertilizer,irrigation,and precipitation may potentially increase greenhouse gas(N2O and CO_2) releases from saline-sodic soils.Upasana GHOSH Resham THAPA Thomas DESUTTER HE Yangbo Amitava CHATTERJEE 2017Pedosphere2017,27,1:5
4Silver nanoparticles tolerant bacteria from sewage environment显示文摘Silver nanoparticle (SNP) is a threat to soil,water and human health.Protection of environment from silver nanoparticles is a major concern.A sewage isolate,Bacillus pumilus treated with SNPs showed similar growth kinetics to that without nanoparticles.A reduction in the amount of exopolysaccharides was observed after SNPs-B.pumilus culture supernatant interaction.The Fourier transform infrared spectroscopy (FT-IR) peaks for the exopolysaccharides extracted from the bacterial culture supernatant and the interacted SNPs were almost similar.The exopolysaccharide capping of the SNPs was confirmed by UV-Visible,FT-IR and X-ray diffraction analysis.The study of bacterial exopolysaccharides capped SNPs with E.coli,S.aureus and M.luteus showed less toxicity compared to uncoated SNPs.Our studies suggested that the capping of nanoparticles by bacterially produced exopolysaccharides serve as the probable mechanism of tolerance.Sudheer Khan Amitava Mukherjee Natarajan Chandrasekaran 2011Journal of Environmental Sciences2011,23,2:3
5Platelet-Derived Growth Factor Signaling Through Ephrin-B2 Regulates Hepatic Vascular Structure and Function显示文摘David Semela Amitava Das Daniel Langer Ningling Kang Edward Leof Vijay Shah 2008Gastroenterology2008,,2:3
6Simple scanning semiconductor diode laser source and its application in wavelength modulation spectroscopy around 825nm显示文摘Ayan Ray Amitava Bandyopadhyay Sanka De 2005Optics & Laser Technology2005,,:1
7A new social and momentum component adaptive PSO algorithm for image segmentation显示文摘Akhilesh Chander Amitava Chatterjee Patrick Siarry 0,,05:1
8Using Simulation to Make Order Acceptance/Rejection Decisions 显示文摘Nandi Amitava Paul Rogers 2004Simulation2004,80,3:1
9Low temperature sintering of La(Ca)CrO3 prepared by an autoignition process显示文摘 Basu R N Maiti H S 2000Materials Letters2000,45,:1
10Synthesis of functionalized benz-imidazoles and quinoxalines catalyzed by sodium hexafluorophos-phate bound Amberlite resin in aqueous medium显示文摘Pranab Ghosh Amitava Mandal 2012Tetrahedron Letters2012,53,48:1
11A hybrid approach for design of stable adaptive fuzzy controllers employing Lyapunov theory and particle swarm optimization显示文摘Kaushik Das Sharma Amitava Chatterjee Anjan Rakshit 2009IEEE Transactions on Fuzzy Systems2009,17,2:1
12On evaluating and optimizing weights for weighted random pattern testing显示文摘 1996IEEE Transactions on Computers1996,45,8:1
13CdS@TiO2 and ZnS@TiO2 core-shell nanocomposites: Syn thesis and optical properties 显示文摘Sonalika Vaidya Amitava Patra Ashok Kumar Ganguli 2010Colloids Surf A: Physico chem Eng Aspects2010,363,:1
14Pantoprazole Improves Glycemic Control in Type 2 Diabetes: A Randomized, Double-Blind, Placebo-Controlled Trial显示文摘Pawan Kumar Singh Debasish Hota Pinaki Dutta Naresh Sachdeva Amitava Chakrabarti Anand Srinivasan Inderjeet Singh Anil Bhansali 2012The Journal of Clinical Endocrinology & Metabolism2012,,11:1
15Sustainable cities in developing countries 显示文摘Amitava D 1998Building Research and Information1998,26,1:1
16Fuzzy Discretization of feature space for a rough set classifier 显示文摘Amitava R Pasankar K 2003Pattern Recognition Letters2003,,24:1
17Effect of tempe- ring temperatures on the mechanical properties and micro- structure of HSLA 100 type copper baring steels显示文摘DHUA S K AMITAVA R SAMA D S 2001Materi- als Science and Engineering A2001,318,:1
18Orbital amelanotic melanoma in xeroderma pigmentosum:A rare association显示文摘Rizvi SAR Amitava AK Mehdi G 0,,05:1
19Networks for Homes显示文摘Amitava Dutta-Roy 1999IEEE Spectrum1999,,:1
20Analytical Approximation for the Surface Potential in n-Channel MOSFETs Considering Potential in n-Channel MOSFETs Considering显示文摘G S Jayadeva Amitava DasGupta 2010IEEE Trans ED2010,57,8:1
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