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Distribution of mineral species in different coal seams of Talcher coalfield and its transformation behavior at varying temperatures

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International Journal of Coal Science & Technology 2016年第2期3卷 97-103页

作者： amit banerjee P. R. Mishra Ashok Mohanty K. Chakravarty R. Das Biswas R. Sahu S. Chakravarty Analytical Chemistry Division CSIR - NationalMetallurgical Laboratory Jamshedpur Jharkhand 831007India Department of Metallurgical and Materials Engineering National Institute of Technology JamshedpurJharkhand 831014 India R&D Tata Steel Ltd Jamshedpur Jharkhand 831007 India

Mineral phase characterization and thorough understanding of its transformation behavior during combustion are imperative to know the potential utilization of coal in the thermal industries. The primary objective of this work is to analyze the quality of Indian Coals and obtain their mineral species-specific information at different depths. The samples were obtained from Talcher Coalfield, Odisha, India. Coal from four seam sections in the Talcher coalfield, India are mainly high ash coal （〉50 %） and volatile matter deceases along with the seam depth. XRD results show that the major mineral phases present in the coal are quartz and kaolinite. Siderite, illite, and anatase were found in minor quantities. It has been observed that the clay minerals （kaolinite, silimanite, illite） decompose at higher temperature and traces of dolomite, mullite, hematite etc. are formed during the process of combustion. Among the four seams （M2, M12, M24 and M43） studied, ash of M43 has high A1203%, TIO2% and K20% content and low SIO2%, CaO% and MgO% content. High acid- to-base ratios contributed to high ash fusion temperatures （IDT 〉 1500 ℃） and low slagging potential of the coals studied. Relatively low fouling index （〈0.3） was estimated for all the coal seams studied. Furthermore, thermodynamic modeling software, FactSage, have been used to envision the mineral phase transformations that take place between 800 and 1500℃ during coal combustion.

关键词： Proximate analysis - Ultimate analysis FactSage XRD AFT Talcher coalfield

Conventional and Predictive Control Algorithms for Controlling Nonlinear Processes Using Multiple-Model Approach

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Journal of Mechanics Engineering and Automation 2013年第1期3卷 22-28页

作者： Ma'moun Abu-Ayyad Issam Abu-Mahfouz amit banerjee Mechanical Engineering Department School of Science Engineering and Technology Penn State Harrisburg Middletown PA1705 7 USA

The objective of this work is to formulate and demonstrate the methodology of multi-models for improving the performance of existing advanced control strategies. Multiple models are used to capture the nonlinear process dynamics relating to gain and time constant variations. The multi-model strategy was implemented on several controllers such as Smith-Predictor using PI （Proportional-lntegral） and GPC （Generalized Predictive Control）. Computer simulations and experiments were conducted on several nonlinear systems and compared to the original form of these controllers. The enhanced approach was tested on controlling the screw speed of an injection molding machine and temperature of a steel cylinder.

关键词： Multi-models Smith-Predictor generalized predictive control.

Thermal Decomposition Behavior and Kinetic Study of Jamadoba Coal and Its Density Separated Macerals: A Non-Isothermal Approach

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Advances in Chemical Engineering and Science 2021年第3期11卷 203-227页

作者： Deepak Chandra Sau amit banerjee Sanchita Chakravarty Pragyan Senapati Rabiranjan Murmu Harekrushna Sutar CSIR-National Metallurgical Laboratory Jamshedpur India Mechanical Engineering Department ITER SOA Deemed to Be University Bhubaneswar India Chemical Engineering Department Indira Gandhi Institute of Technology Sarang India

This kinetic study focuses on determining the thermal gravimetric profile of a particular grade of Indian sub-bituminous coal. A thermogravimetric analyzer (TGA-1000) was employed to investigate the thermal behavior and extract the kinetic parameters of Jamadoba coal and its corresponding density separated macerals. The weight loss was measured in air atmosphere. The coal samples used in this study were obtained from Jamadoba mines, Jharkhand. Samples of 35 mg and 200 μm mean size were subjected to synthetic air atmospheres (21% O2). Heating rates of 2, 5 and 7°C/min were applied until the temperature reached 1400°C, which was kept constant until burnout. Low heating rate was preferred so that devolatilization occurs prior to ignition and combustion. Derivative thermogravimetry (DTG) analysis method was applied to measure the weight changes and rates of weight loss used for calculating the kinetic parameters. The activation energy (E

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纳米级金刚石的超大弹性形变

家电科技 2018年第5期 6-6页

作者： amit banerjee Yang Lu Subra Suresh 刘斐莹

金刚石具有很强的硬度和耐磨性，但使金刚石形变通常会导致脆性断裂。本文研究展示了纳米级（~300纳米）单晶和多晶金刚石针的超大、完全可逆的弹性形变。对于单晶金刚石，最大拉伸应变（高达9％）接近理论弹性极限，并且相应的最大拉... 详细信息

金刚石具有很强的硬度和耐磨性，但使金刚石形变通常会导致脆性断裂。本文研究展示了纳米级（~300纳米）单晶和多晶金刚石针的超大、完全可逆的弹性形变。对于单晶金刚石，最大拉伸应变（高达9％）接近理论弹性极限，并且相应的最大拉伸应力达到约89至98千兆帕斯卡。

关键词：纳米级金刚石弹性形变单晶金刚石最大拉伸应力多晶金刚石脆性断裂弹性极限拉伸应变

Applications of phototheranostic nanoagents in photodynamic therapy

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Nano Research 2015年第5期8卷 1373-1394页

作者： Jayeeta Bhaumik amit Kumar Mittal Avik Banedee Yusuf Chisti Uttam Chand banerjee Department of Pharmaceutical Technology (Biotechnology) National Institute of Pharmaceutical Education and Research Sector 67 S.A.S. Nagar 160062 India Department of Radiology Dayanand Medical College and Hospital Ludhiana 141001 India School of Engineering Massey University Private Bag 11 222 Palmerston North New Zealand

Nanotherapeutics has an increasing role in the treatment of diseases such as cancer. In photodynamic therapy （PDT） a therapeutically inactive photosensitizer compound is selectively activated by light to produce molecules capable of killing diseased cells and pathogens. A phototheranostic agent can be defined as a single nanoentity with the capabilities for targeted delivery, optical imaging and photodynamic treatment of a disease. Malignant cells, tissue and microbial etiologic agents can be effectively targeted by PDT. Photodynamic therapy is noninvasive, or minimally invasive, and has few side effects as damage to healthy tissue is minimized and the killing effect is localized. Various forms of cancer, acne and other diseases may be treated. The in vivo efficacy of photosensitizers is further improved by attaching them to nanostructures capable of targeting the diseased site. Such photosensitizer-functionalized nanostructures, or nano- therapeutics, allow site-specific delivery of imaging and therapeutic agents for improved phototheranostic performance. This review explores the potential applications of phototheranostic nanostructures in diagnosis and therapy.

关键词： phototheranostics photodynamic therapy photosensitizers theranostics nanomedicine

Evidence Based Validation of Indian Traditional Medicine–Way Forward

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World Journal of Traditional Chinese Medicine 2016年第1期2卷 48-61页

作者： Pulok K Mukherjee Ranjit K Harwansh Shiv Bahadur Subhadip banerjee amit Kar School of Natural Product Studies Department of Pharmaceutical Technology Jadavpur University

Evidence based validation of the ethno-pharmacological claims on traditional medicine(TM) is the need of the day for its globalization and reinforcement. Combining the unique features of identifying biomarkers that are highly conserved across species, this can offer an innovative approach to biomarker-driven drug discovery and development. TMs are an integral component of alternative health care systems. India has a rich wealth of TMs and the potential to accept the challenge to meet the global demand for them. Ayurveda, Yoga, Unani, Siddha and Homeopathy(AYUSH) medicine are the major healthcare systems in Indian Traditional Medicine. The plant species mentioned in the ancient texts of these systems may be explored with the modern scientific approaches for better leads in the healthcare. TM is the best sources of chemical diversity for finding new drugs and leads. Authentication and scientific validation of medicinal plant is a fundamental requirement of industry and other organizations dealing with herbal drugs. Quality control(QC) of botanicals, validated processes of manufacturing, customer awareness and post marketing surveillance are the key points, which could ensure the quality, safety and efficacy of TM. For globalization of TM, there is a need for harmonization with respect to its chemical and metabolite profiling, standardization, QC, scientific validation,documentation and regulatory aspects of TM. Therefore, the utmost attention is necessary for the promotion and development of TM through global collaboration and co-ordination by national and international programme.

关键词： Indian traditional medicine AYUSH Ayurveda Chemical profiling Plant metabolomics

Groundwater fluoride contamination:A reappraisal

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Geoscience Frontiers 2015年第2期6卷 277-284页

作者： Amlan banerjee Geological Studies Unit Indian Statistical Institute

Dissolution of fluorite （CaF2） and/or fluorapatite （FAP） [Cas（PO4）3F], pulled by calcite precipitation, is thought to be the dominant mechanism responsible for groundwater fluoride （F） contamination. Here, one dimensional reactive-transport models are developed to test this mechanism using the published dissolution and precipitation rate kinetics for the mineral pair FAP and calcite. Simulation results correctly show positive correlation between the aqueous concentrations of F and CO2 and negative correlation between F- and Ca^2＋. Results also show that precipitation of calcite, contrary to the present understanding, slows down the FAP dissolution by 10G orders of magnitude compared to the FAP dissolution by hydrolysis. For appreciable amount of fluoride contamination rock-water interaction time must be long and of order 106 years.

关键词： Fluoride Contamination Dissolution Precipitation Reactive transport model

Mathematical Model of Relativistic Anisotropic Compact Stellar Model Admitting Linear Equation of State

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Communications in Theoretical Physics 2018年第11期69卷 585-592页

作者： Sumita banerjee Department of Mathematics Budge Budge Institute of Technology

In present paper, a static, spherically symmetric, anisotropic stellar object has been discussed by assuming a linear relationship between the matter density ρ and radial pressure pr. The interior solution is continuously matched with the exterior Schwarzschild vacuum solution at the junction interface. Various physical features viz. energy conditions,mass-radius relationship, stability are analyzed for our stellar model. By assigning some particular value to the arbitrary constants we have obtained a model of compact star of radius 6.7 km. and mass 1.148 M_⊙, which is very close to the observational data of the compact star Her X-1 proposed by Rawls et al. [Rawls, et al., Astrophys. J. 730(2011) 25].We have obtained that the model satisfies all the regularity conditions. We have found that our proposed model is stable as well as singularity-free.

关键词： compact anisotropic spherically symmetric singularity free

Molecular level biodegradation of phenol and its derivatives through dmp operon of Pseudomonas putida:A bio-molecular modeling and docking analysis

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Journal of Environmental Sciences 2015年第10期27卷 144-151页

作者： Sujay Ray Arundhati banerjee Department of Biochemistry and Biophysics University of Kalyani Department of Biotechnology Bengal College of Engineering and TechnologyShahid Sukumar SaraniBidhannagarDurgapur-713212West BengalIndia Department of Biotechnology National Institute of Technology

Participation of Pseudomonas putida-derived methyl phenol（dmp） operon and Dmp R protein in the biodegradation of phenol or other harmful, organic, toxic pollutants was investigated at a molecular level. Documentation documents that P. putida has Dmp R protein which positively regulates dmp operon in the presence of inducers; like phenols. From the operon,phenol hydroxylase encoded by dmp N gene, participates in degrading phenols after dmp operon is expressed. For the purpose, the 3-D models of the four domains from Dmp R protein and of the DNA sequences from the two Upstream Activation Sequences（UAS）present at the promoter region of the operon were demonstrated using discrete molecular modeling techniques. The best modeled structures satisfying their stereo-chemical properties were selected in each of the cases. To stabilize the individual structures, energy optimization was performed. In the presence of inducers, probable interactions among domains and then the two independent DNA structures with the fourth domain were perused by manifold molecular docking simulations. The complex structures were made to be stable by minimizing their overall energy. Responsible amino acid residues, nucleotide bases and binding patterns for the biodegradation, were examined. In the presence of the inducers, the biodegradation process is initiated by the interaction of phe50 from the first protein domain with the inducers. Only after the interaction of the last domain with the DNA sequences individually, the operon is expressed. This novel residue level study is paramount for initiating transcription in the operon; thereby leading to expression of phenol hydroxylase followed by phenol biodegradation.

关键词： Biodegradation dmp operon Docking simulations Modeling Phenol P.putida