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Chinese Journal of Chemical Engineering 2018年第9期26卷 1904-1911页

作者： Anis H.Fakeeha Ahmed S.Al-Fatesh biswajit chowdhury Ahmed A.Ibrahim Wasim U.Khan Shahid Hassan Kasim Sasudeen Ahmed Elhag Abasaeed Chemical Engineering Department College of Engineering King Saud University Department of Applied Chemistry Indian School of Mines

Methane decomposition reaction has been studied at three different activation temperatures（500℃,800℃ and950℃）over mesoporous alumina supported Ni–Fe and Mn–Fe based bimetallic *** co-impregnation of Ni on Fe/Al2O3the activity of the catalyst was retained even at the high activation temperature at 950℃ and up to180 *** Ni promotion enhanced the reducibility of Fe/Al2O3oxides showing higher catalytic activity with a hydrogen yield of 69%.The reactivity of bimetallic Mn and Fe over Al2O3catalyst decreased at 800℃ and 950℃ activation *** studies revealed that the catalyst could be effectively recycled up to *** addition of O2（1 ml,2 ml,4 ml）in the feed enhanced substantially CH4conversion,the yield of hydrogen and the stability of the catalyst.

关键词： Carbon nanotube Hydrogen production Methane decomposition Manganese promoter Nickel promoter

Towards a sustainable geoliner construction in landflls by potential blending of fly ash with kaolin clay alternative:a review with an insight to Indian scenario

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Waste Disposal and Sustainable Energy 2024年第2期6卷 243-258页

作者： Kshitij Kumar biswajit Paul Department of Environmental Science and Engineering Indian Institute of Technology(Indian School of Mines)Dhanbad 826004JharkhandIndia

Electricity generated through coal-based Thermal Power Plants(TPPs)has played a pivotal role in shaping modern civiliza-tion,revolutionizing industries,and improving the quality of life for billions of people *** TPPs contribute to about 37%-40%of the global energy *** production,in turn,has a direct impact on the economy of any *** from this boon to humankind,these TPPs combusting coal as their primary fuel also have specific environmen-tal impacts,the major ones being water,air,and soil pollution due to unscientific disposal of high-quantity fly ash produced *** we can put this ash to good use,it may assist us in mitigating the pollution caused by *** there are many conventional uses of fly ash,such as a pozzolanic material in the cement industry,more pathways need to be discovered to balance the high generation quantities with ***,a detailed description of its use in potential geoliner applications is presented in this article.A geoliner or a landfill liner acts as a virtually impenetrable layer to mitigate the leachate penetration into the underneath subsoil and groundwater,thus preventing *** are presently some studies that support the use of only fly ash in such ***,the properties of the geoliners using it are not so good to significantly mitigate environmental degradation owing to its high permeability and low densification *** bentonite conventionally used has limited deposits and is mined intensively for its use as a natural *** depos-its must also be conserved,and an alternative material that may serve similar application benefits,like bentonite,must be *** desired aim can be fulfilled if we blend this combustion residue with other suitable materials(such as kaolinite clay)with low ***,the article focuses on the possibilities of blending fly ash with different clays for geoliner construction to improve the in

关键词： Fly ash-Geoliner Environmental management Composite liner systems Bentonite Kaolin clay

Novel succinoylated carboxymethyl guar gum nanocarriers of glimepiride for controlling type-2 diabetes

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Medicine in Novel Technology and Devices 2024年第2期22卷 133-139页

作者： Harsh Yadav biswajit Maji Sabyasachi Maiti Department of Pharmacy Indira Gandhi National Tribal UniversityAmarkantakMadhya PradeshIndia Department of Chemistry Indira Gandhi National Tribal UniversityAmarkantakMadhya PradeshIndia

In this study,guar gum(GG)was chemically modified to its carboxymethyl derivative,which was then esterified with octenyl succinic anhydride(OSA)using a nucleophilic catalyst 4-dimethylaminopyridine(DMAP)to render the derivative amphiphilic *** carboxymethyl guar gum(CMGG)and succinoylated CMGG was characterized using Fourier transform infrared spectroscopy(FTIR)*** amphiphilic CMGG synthesized using DMAP/OSA ratio of 0.5:1(CMGGOSA-I),was found to be *** amphiphilic guar gum self-assembled in water to form nanocarriers with mean diameter of 430 nm and zeta potential of19.0 *** electron microscope(TEM)image showed spherical nature of the developed CMGGOSA-I nano*** presence of amphiphilic CMGG,the aqueous solubility of glimepiride was enhanced by about *** nanocarriers released glimepiride in simulated gastrointestinal fluids for a period of more than 24 h,following Higuchi's ***-Peppas modeling of the drug release data revealed that a combination of swelling and diffusion mechanism was operative in the event of drug *** streptozotocin-induced diabetic rat model,the nanocarriers outperformed pure drug suspensions in terms of anti-diabetic activity,which lasted up to 24 ***;the newly synthesized amphiphilic CMGG nanocarriers demonstrated controlled drug release properties and showed promise for controlling type-2 diabetes.

关键词： Guar gum Glimepiride Octenyl succinic anhydride Anti-diabetic efficacy

Trigonelline mitigates bleomycin-induced idiopathic pulmonary fibrosis in mice

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Asian Pacific Journal of Tropical Biomedicine 2024年第9期14卷 391-400,I0008-I0291页

作者： Swapnil Gavhane Chandrakant Gawli Sachin Kumar biswajit Das Gayatri Marathe Vishal S.Patil Harun M.Patel Basavaraj Bommanahalli Chanakya Nath Kundu Chandragouda R.Patil R.C.Patel Institute of Pharmaceutical Education and Research Karwand NakaShirpurMaharashtra 425405India Department of Pharmacology Delhi Pharmaceutical Sciences and Research UniversityNew Delhi 110017India School of Biotechnology Kalinga Institute of Industrial TechnologyBhubaneshwar 751024India Gadag Institute of Medical Sciences GadagKarnataka 582103India

Objective:To evaluate the effect of trigonelline on bleomycin-induced idiopathic pulmonary fibrosis(IPF)and to explore its underlying mechanisms using network ***:IPF was induced in C57BL/6 mice by a single intratracheal instillation of bleomycin(5 mg/kg).Trigonelline was administered at doses of 25,50,and 100 mg/kg/day orally from the 2nd day post-bleomycin induction up to the 14th *** IPF-induced mice,lung coefficient,immune cell infiltration in bronchoalveolar lavage fluid,and oxidative stress were *** alterations in lung tissues were also ***,network pharmacology approach was conducted to reveal molecular interactions of bleomycin and trigonelline with targets of ***:Trigonelline treatment reduced bleomycin-induced oxidative stress and immune cell infiltration,and mitigated physiological changes in the lung tissues of ***,trigonelline alleviated bleomycin-induced histological alterations in lung *** pharmacology analysis showed that bleomycin and trigonelline interacted with IPF targets,such as NFKB1,HDAC2,HIF1A,and ***:The interaction of trigonelline with key IPF targets and its ameliorative effects on lung damage and oxidative stress highlight its potential in treating *** may be considered an antifibrotic agent for further clinical development.

关键词： Trigonelline Idiopathic pulmonary fibrosis Antifibrotic Bleomycin Network pharmacology

Stroke:Evolution of newer treatment modalities for acute ischemic stroke

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World Journal of Clinical Cases 2024年第28期12卷 6137-6147页

作者： Deb Sanjay Nag Amlan Swain Seelora Sahu biswajit Sen Vatsala Sadiya Parween Department of Anaesthesiology Tata Main HospitalJamshedpur 831001India Department of Anaesthesiology Manipal Tata Medical CollegeJamshedpur 831017India

Acute ischemic stroke is one of the leading causes of morbidity and mortality *** of cerebral blood flow to affected ischemic areas has been the cornerstone of therapy for patients for eligible patients as early diagnosis and treatment have shown improved ***,there has been a paradigm shift in the management approach over the last decade,and with the emphasis currently directed toward including newer modalities such as neuroprotection,stem cell treatment,magnetic stimulation,anti-apoptotic drugs,delayed recanali-zation,and utilization of artificial intelligence for early diagnosis and suggesting algorithm-based management protocols.

关键词： Acute ischemic stroke Neuroprotection Treatment Neurocritical care Thrombolytic therapy Reperfusion injury Oxidative stress

Recent advances in managing obstructive sleep apnea

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World Journal of Clinical Cases 2024年第24期12卷 5456-5461页

作者： Deb Sanjay Nag Abhishek Chatterjee Roushan Patel biswajit Sen Bappa Ditya Pal Gunjan Wadhwa Department of Anaesthesiology Tata Main HospitalJamshedpur 831001JharkhandIndia Department of Anaesthesiology Manipal Tata Medical CollegeJamshedpur 831017India

Obstructive sleep apnea(OSA)is a rapidly increasing global *** it remains untreated,it can lead to cardiovascular,metabolic,and psychiatric complications and may result in premature *** efficient and effective management of OSA can have a beneficial effect and help reduce the financial burden on the health *** has been constant development in OSA management,and numerous options are *** mainstay of therapy is still the conventional measures and behavioral ***,in cases of failure of these modalities,surgical therapy is the only *** studies have shown that proper management of OSA has beneficial effects with good long-term outcomes.

关键词： Sleep apnea Obstructive Continuous positive airway pressure Concepts Pharmacological

Can we constrain the evolution of HI bias using configuration entropy?

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Research in Astronomy and Astrophysics 2021年第2期21卷 82-88页

作者： biswajit Das biswajit Pandey Department of Physics Visva-Bharati UniversitySantiniketanBirbhum731235India

We study the evolution of the configuration entropy of HI distribution in the post-reionization era assuming different time evolution of HI *** describe time evolution of linear bias of HI distribution using a simple form b(a)=b_(0)a^(n) with different index *** derivative of the configuration entropy rate is known to exhibit a peak at the scale factor corresponding to theΛ-matter equality in the unbiasedΛCDM *** show that in theΛCDM model with time-dependent linear bias,the peak shifts to smaller scale factors for negative values of *** is related to the fact that the growth of structures in the HI density field can significantly slow down even before the onset ofΛdomination in the presence of a strong time evolution of the HI *** find that the shift is linearly related to the index *** obtain the best fit relation between these two parameters and propose that identifying the location of this peak from observations would allow us to constrain the time evolution of HI bias within the framework of theΛCDM model.

关键词： methods analytical-cosmology theory-large scale structure of the universe

Sustainability of metal recovery from E-waste metal recovery sustainability

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Frontiers of Environmental Science & Engineering 2018年第6期12卷 15-26页

作者： biswajit Debnath Ranjana chowdhury Sadhan Kumar Ghosh Department of Chemical Engineering Jadavpur UniversityKolkata 700032India Department of Mechanical Engineering Jadavpur UniversityKolkata 700032India

The issue of E-waste disposal is concerning all the stakeholders, from policymakers to the end users which have accelerated the research and development on environmentally sound disposal of E-waste. The recovery of metals (gold, tantalum, copper, iron etc.) from E-waste has become an important focus. The mechanical recycling, thermo-chemical processes like pyrolysis, pyro-, hydro- and biometallurgical processes can play important roles in the Metal Recovery from E-waste (MREW) technology. For the industrial application of the MREW technology, it is important to analyze the sustainability. In this paper, two case studies have been presented on E-waste recycling industries in India and China. Based on the literature data, an attempt has been made to assess qualitatively the overall sustainability of MREW technology considering the three pillars, i.e., environmental, economic and social. Two conceptual frameworks with (Option-2) and without (Option-1) pyrolysis for integrated MREWunits have been developed and the generalized energy and environmental impact analysis has been made using the principles of LCA. The impacts of two options have been compared. Option 2 has been found to be more efficient and sustainable. It has been realized that climate change, fossil fuel depletion, water depletion, eutrophication, acidification, fresh and marine water ecotoxicity are possible impact categories. The recommendations based on the generalized assessment are in good agreement with the findings of previous researchers on individual steps of MREWunit. The findings of this paper are expected to be beneficial to researchers and stakeholders for research directions and decision making on MREW.

关键词： E-waste Metal recovery Metal Recovery from E-waste (MREW) Sustainability

Nonlinear Dispersive and Dissipative Electrostatic Structures in Two-Dimensional Electron-Positron-Ion Quantum Plasma

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Communications in Theoretical Physics 2019年第2期71卷 237-242页

作者： Nabakumar Ghosh biswajit Sahu Department of Mathematics Mugberia Gangadhar MahavidyalayaBhupatinagarPurba Medinipur-721425India Department of Mathematics West Bengal State UniversityBarasatKolkata-700126India

The nonlinear features of two-dimensional ion acoustic(IA) solitary and shock structures in a dissipative electron-positron-ion(EPI) quantum plasma are investigated. The dissipation in the system is taken into account by incorporating the kinematic viscosity of ions in plasmas. A quantum hydrodynamic(QHD) model is used to describe the quantum plasma system. The propagation of small but finite amplitude solitons and shocks is governed by the Kadomtsev-Petviashvili-Burger(KPB) equation. It is observed that depending on the values of plasma parameters(*** diffraction, positron concentration, viscosity), both compressive and rarefactive solitons and shocks are found to exist. Furthermore, the energy of the soliton is computed and possible solutions of the KPB equation are presented numerically in terms of the monotonic and oscillatory shock profiles

关键词： quantum plasma Kadomtsev-Petviashvili-Burger equation nonlinear structures

Nonlinear Structures in an Ion-Beam Plasmas Including Dust Impurities with Nonthermal Nonextensive Electrons

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Communications in Theoretical Physics 2017年第7期67卷 117-124页

作者： Debjit Dutta biswajit Sahu Department of Mathematics West Bengal State University Barasat Kolkata 700126 India

The properties of dust ion acoustic waves are investigated in an unmagnetized multicomponent plasma system consisting of ion beam, charged positive and negative ions, electrons obeying nonthermal-Tsallis distribution and stationary negatively charged dust grains by the conventional Sagdeev pseudopotential method, through which the condition for existence of several nonlinear structures is analyzed theoretically. The dispersion relation for electrostatic waves is derived and analyzed and an expression of the energy integral equation is obtaJned. It is reported here that our plasma model supports solitions, double layers and supersoliton solutions for certain range of parameters. Finally, the effects of different physical plasma parameters on these nonlinear structures are studied numerically. The present theory should be helpful in understanding the salient features of the electrostatic waves in space and in laboratory plasmas where two distinct groups of ions and non-Maxwellian distributed electrons are present.

关键词： multicomponent plasma dust ion acoustic waves solitons and supersolitons