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Acta Oceanologica sinica 2018年第4期37卷 22-33页

作者： RAY Durbar banerjee Ranadip MAZUMDER Aninda PAROPKARI Anil L. MUKHOPADHYAY subir BALAKRIsHNAN srinivasan CsIR-National Institute of Oceanography Dona Paula Goa 403004 India Department of Geological sciences Jadavpur University Kolkata 700032 India Department of Earth sciences Pondicherry University Puducherry 605014 India

Polymetallic sulfides from two hydrothermal chimneys and talus deposit from the Vienna Woods field of Manus Basin were studied for mineralogy,elemental composition,and s-isotope ratio to understand their *** factors including the nature of source fluid,mineral paragenesis,and related geochemical processes have been *** and elemental concentration of Cu and Fe-rich large chimney at the central part of this hydrothermal field was completely different from the smaller Zn-rich peripheral chimney and Fe-rich talus deposit,suggesting the variable degree of alterations generate physico-chemically different source fluids responsible for these hydrothermal ***,s-isotope ratios also indicate chemically diverse fluids and different modes of precipitation were involved in their *** mineral zonings and associated elemental and isotopic compositions within individual deposit confirm paragenetic shifts were involved during their growth process.

关键词： Manus Basin hydrothermal chimney talus geochemistry mineralogy

Integrated borehole and outcrop study for documentation of sea level cycles within the Early Eocene Naredi Formation,western Kutch,India

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Journal of Palaeogeography 2012年第2期1卷 126-137页

作者： Urbashi sarkar santanu banerjee P.K.saraswati Department of Earth sciences Indian Institute of Technology BombayPowaiMumbai-400076India

A combined micropalaeontological and sedimentological investigation of the Early Eocene Naredi Formation (thickness varying between 20 m and 60 m) reveals a complete third-order cycle and six fourth-order sea level cycles. Within the third-order cycle the foraminiferal abundance and diversity gradually increase upwards and reach their maximum values at about 41 m thickness above the base of the formation and subsequently decrease upward and finally give way upward to an unfossiliferous zone at the topmost part. Within a fourth-order cycle foraminiferal abundance and diversity exhibit a similar increasing and decreasing pattern. Bounded between two unconformities the Naredi Formation represents a sequence. A highly fossiliferous Assilinabearing limestone interval represents the maximum flooding zone which separates the transgressive systems tract at the base from the highstand systems tract at the top.

关键词： Early Eocene Naredi Formation sea level cycle Foraminifera western Kutch India

Well-Defined Fluorinated Copolymers:Current status and Future Perspectives

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Accounts of Materials Research 2021年第4期2卷 242-251页

作者： subrata Dolui Devendra Kumar sanjib banerjee Bruno Ameduri Department of Chemistry Indian Institute of Technology BhilaiRaipur 492015ChhattisgarhIndia ICGM Universitéde MontpellierCNRSENSCMMontpellierFrance

Well-defined fluoropolymers exhibit unique properties such as excellent oil and water repellency,satisfactory thermal stability,a low refractive index,and low surface *** origin of these properties is attributed to the presence of a strong electronegative and low polarizable fluorine atom in the backbone of such polymers,which leads to a strong C−F bond(with a high bond dissociation energy of 485 kJ mol−1).Because of these features,these polymers have found applications as functional coatings,thermoplastics,biomedical items,separators,and binders for Li ion batteries,fuel cell membranes,piezoelectric devices,high-quality wires and cables,and so ***,fluoropolymers are synthesized by the conventional radical(co)polymerization of fluoroalkenes,which leads to the production of(co)polymers with an ill-defined end group,uncontrolled molar mass,and high dispersity *** the last two decades,significant developments of various reversible deactivation radical polymerization(RDRP)techniques have helped the design of macromolecular architectures(including block,graft,star,and dendrimers)on ***,for relevant new applications,well-defined fluoropolymers with controlled macromolecular architectures(e.g.,block copolymers as thermoplastic elastomers and electroactive polymers or graft copolymers for fuel cell membranes)are *** RDRP methods,developed in the last two decades,have paved the way for the synthesis of(co)polymers with well-defined molar mass,dispersity,chain end-functionality,and macromolecular *** of these RDRP techniques have been successfully employed for the synthesis of well-defined fluorinated *** techniques include iodine-transfer polymerization(ITP),reversible addition−fragmentation chain-transfer(RAFT)polymerization,organometallic-mediated radical polymerization(OMRP),and,to a lesser extent,nitroxide-mediated polymerization(NMP).Impressive control of the molar mass parameters of the fluoropo

关键词： polymerization molar reversible

Light weight HTPB-clay nanocomposites (HCN) with enhanced ablation performance as inhibition materials for composite propellant

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Defence Technology（防务技术） 2021年第2期17卷 559-570页

作者： Kavita Ghosh L.V.Gaikwad R.K.Kalal P.A.Kulkarni Arvind Kumar shaibal banerjee Manoj Gupta High Energy Materials Research Laboratory SutarwadiPune411021India Defence Institute of Advanced Technology GirinagarPune411025India

In the present study,organically modified Montmorillonite clay with polar moiety,the Cloisite 30B,is used for preparation of Hydroxyl terminated polybutadiene(HTPB)-clay nanocomposites(HCN)by dispersion of nanoclay in polymer matrix under high shear *** nanocomposites thus prepared are evaluated in composite propellants as inhibitor material for their functional *** inhibition formulations containing 5 wt%-15 wt%of nanoclay,with or without the conventional filler sb2O3,were *** these formulations were evaluated for their physical,mechanical,thermal,and ablative *** rate and density of the compositions containing Cloisite 30B is around 23%and 5%lower respectively in comparison of the base *** capability of these compositions is twofold higher than that of base *** compositions have also been evaluated for their smoke generation tendency by measuring infra red(IR)attenuation in the wavelength range 1.3 mm e5.6 mm and 8 mme13 mm and thereby compared with the base *** corresponding results confirmed that the compositions containing Cloisite 30B as filler have much lower IR attenuation than compositions with conventional filler,*** of 5%sb2O3 by nanoclay showed 8%reduction in IR attenuation rate which further reduced to 16%on replacement of 15%of *** bonding of HCN based inhibitors is also comparable or even better than conventional ***,the nanoclay composites with Cloisite 30B as filler exhibit all desirable properties of an inhibitor.

关键词： Nanocomposite Inhibitor Composite propellant Ablation

Glass and Mineral Chemistry of Northern Central Indian Ridge Basalts:Compositional Diversity and Petrogenetic significance

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Acta Geologica sinica(English Edition) 2009年第6期83卷 1122-1135页

作者： Dwijesh RAY Ranadip banerjee sridhar D IYER Basavaraju BAsAVALINGU subir MUKHOPADHYAY4 National Centre for Antarctic and Ocean Research National Institute of Oceanography CSIR Department of studies in Geology University of Mysore Department of Geological sciences Jadavpur University

The glass and mineral chemistry of basaits examined from the northern central Indian ridge （NCIR） provides an insight into magma genesis around the vicinity of two transform faults： Vityaz （VT） and Vema （VM）. The studied mid-ocean ridge basalts （MORBs） from the outer ridge flank （VT area） and a near-ridge seamount （VM area） reveal that they are moderately phyric plagioclase basalts composed of plagioclase （phenocryst [An60-90] and groundmass [An35-79]）, olivine （Fo81-88）, diopside （Wo45-51, En25-37, Fs14-24）, and titanomagnetite （FeOt -63.75 wt% and TiO2 -22.69 wt%）. The wholerock composition of these basalts has similar Mg# [mole Mg/mole（Mg＋Fe2＋）] （VT basalt： -0.56-0.58; VM basalt： -0.57）, but differ in their total alkali content （VT basalt： -2.65; VM basalt： -3.24）. The bulk composition of the magma was gradually depleted in MgO and enriched in FeOt, TiO2, P2O5, and Na2O with progressive fractionation, the basalts were gradually enriched in Y and Zr and depleted in Ni and Cr. In addition, the ∑REE of magma also increased with fractionation, without any change in the （La/ Yb）N value. Glass from the VM seamount shows more fractionated characters （Mg#： 0.56-0.57） compared to the outer ridge flank lava of the VT area （Mg#： 0.63-0.65）. This study concludes that present basalts experienced low-pressure crystallization at a relatively shallow depth. The geochemical changes in the NCIR magmas resulted from fractional crystallization at a shallow depth. As a consequence, spinel was the first mineral to crystallize at a pressure 〉10 kbar, followed by Fe-rich olivine at 〈10 kbar pressure.

关键词： mineral chemistry fractional crystallization petrogenesis northern central Indian ridge

Large-signal characterizations of DDR IMPATT devices based on group Ⅲ–Ⅴ semiconductors at millimeter-wave and terahertz frequencies

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Journal of semiconductors 2014年第8期35卷 69-78页

作者： Aritra Acharyya Aliva Mallik Debopriya banerjee suman Ganguli Arindam Das sudeepto Dasgupta J.P.banerjee Institute of Radio Physics and Electronics University of Calcutta 92 APC Road Kolkata 700009 India supreme Knowledge Foundation Group of Institutions Mankundu Hooghly West Bengal 712139 India

Large-signal （L-s） characterizations of double-drift region （DDR） impact avalanche transit time （IM- PATT） devices based on group III-V semiconductors such as wurtzite （Wz） GaN, GaAs and InP have been carried out at both millimeter-wave （mm-wave） and terahertz （THz） frequency bands. A L-s simulation technique based on a non-sinusoidal voltage excitation （NsVE） model developed by the authors has been used to obtain the high frequency properties of the above mentioned devices. The effect of band-to-band tunneling on the L-s properties of the device at different mm-wave and THz frequencies are also investigated. similar studies are also carried out for DDR IMPATTs based on the most popular semiconductor material, i.e. si, for the sake of comparison. A compara- tive study of the devices based on conventional semiconductor materials （i.e. GaAs, InP and si） with those based on Wz-GaN shows significantly better performance capabilities of the latter at both mm-wave and THz frequencies.

关键词： DDR IMPATTs GaN group Ⅲ-Ⅴ large-signal simulation millimeter-wave terahertz regime wurtzite

A Petrogenetic Model of Basalts from the Northern Central Indian Ridge:3-11°s

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Acta Geologica sinica(English Edition) 2007年第1期81卷 99-112页

作者： Dwijesh RAY sridhar D. IYER Ranadip banerjee saumitra MIsRA M. WIDDOWsON Geological Oceanography Division National Institute of Oceanography Goa-403 004 India Department of Geology and Geophysics Indian Institute of Technology Kharagpur-721 302 India Department of Earth sciences Open University Milton Keynes MK7 6AA U.K.

Mid-Ocean Ridge Basalts （MORB） from the Northern Central Indian Ridge （NCIR） were recovered between latitudes 3° and 11° s and are olivine tholeiite with higher abundances of K and Rb. They are of typical transitional MORB （T-MORB） variety and appear to have been generated from an enriched-mantle peridotite source. The primitive NCIR MORBs having Mg^# 〉 0.68 are the product of partial melting at an estimated pressure of - 1 GPa. It is inferred that the magma was subsequently modified at a pressure 〉 1 GPa by crystal fractionation and spinel was the first mineral to crystallize followed by separation of relatively Fe-rich olivine with subsequent decrease in pressure. During progressive fractionation at lower pressure （between 1-0.5 GPa）, the bulk composition of the magma became systematically depleted in MgO, and enriched in ∑FeO, TiO2, P2Os and Na20. There was, however, limited gradual depletion in Al2O3 and CaO and concomitant enrichment in K20. With the progressive fractionation these basalts became gradually enriched in V, Co, Y, Zr and to some extent in sr, and depleted in Ni and Cro In addition, the T_JtEE of the magma also increased with fractionation, without any change in （La/Yb）n value.

关键词： MORB NCIR geochemistry petrogenesis Indian Ocean mid-ocean ridge

Cross-reactive antibody immunity against sARs-CoV-2 in children and adults

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Cellular & Molecular Immunology 2021年第7期18卷 1826-1828页

作者： Elizabeth Fraley Cas LeMaster Dithi banerjee santosh Khanal Rangaraj selvarangan Todd Bradley Genomic Medicine Center Children’s Mercy Research InstituteChildren’s Mercy Kansas CityKansas CityMOUSA Department of Pathology and Laboratory Medicine Children’s Mercy Research InstituteChildren’s Mercy Kansas CityKansas CityMOUSA Department of Pediatrics Children’s Mercy Kansas CityKansas CityMOUSA Department of Pediatrics UMKC School of MedicineKansas CityMOUSA Departments of Pediatrics and Pathology and Laboratory Medicine University of Kansas Medical CenterKansas CityKSUSA

severe acute respiratory syndrome coronavirus 2(sARs-CoV-2)is a novel beta-coronavirus that has emerged and caused a global pandemic of coronavirus disease 2019(COVID-19).1,2 Clinical manifestations of COVID-19 are age dependent,with children appearing to be less vulnerable than adults to severe disease.3,4 It has been reported that a subset of children and adults without previous infection had higher levels of humoral and cellular immunity to sARs-CoV-2,which may influence disease severity.5,6,7,8 Another study found that children who had never been exposed to sARs-CoV-2 had higher levels of cross-reactive antibodies to the spike glycoprotein subunit s2 of sARs-CoV-2 than adults.9 These findings raise the hypothesis that children may have a higher degree of preexisting cross-reactive immunity that provides some level of protection from severe *** this study,we determined antibody responses to sARs-CoV-2 in adults after infection and compared these responses in both children and adults with no prior exposure to ***,we mapped antibody epitopes elicited after infection,and cross-reactive antibody epitopes without prior sARs-CoV-2 infection,at high resolution using sARs-CoV-2 spike protein peptide arrays.

关键词： immunity children finding

Analyzing Whether a space shuttle Can Withstand a Perpendicular Launch from Mars

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Natural science 2023年第10期15卷 257-262页

作者： Mayank banerjee Dulaney High school Timonium Maryland USA

In the near future, humans will go to Mars. During these interplanetary journeys, astronaut safety will be paramount. This study aims to determine whether the astronauts will be able to launch safely from Mars in a space shuttle taking off perpendicularly. This study used kinematics along with equations for calculating atmospheric density and total force on the spacecraft to evaluate these values for each atmospheric layer. Approximations were made for the spacecraft’s dimensions to find the cross-sectional front-view area of the spacecraft and the drag coefficient where verifiable data was unavailable. Although there is data for the dimensions of the spacecraft’s front view, there isn’t any on its area. The total force was found to be significantly lower than 3Gs which ensures a safe take-off for the astronauts and reduces manufacturing costs for assembling new rockets.

关键词： space shuttle spacecraft Mars Rocket Physics Atmosphere Drag Gravity Astronaut Force Thrust Fuel

Animal models in the study of Alzheimer's disease and Parkinson's disease:A historical perspective

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Animal Models and Experimental Medicine 2022年第1期5卷 27-37页

作者： Rajashree banerjee Arushi Rai shreyas M.Iyer sonia Narwal Meghana Tare Department of Biological sciences Birla Institute of Technology and SciencePilaniIndia

Alzheimer's disease and Parkinson's disease are two of the most prevalent and disabling neurodegenerative diseases *** are proteinopathic conditions and while occasionally inherited,are largely sporadic in *** the advances in our understanding of the two have been significant,they are far from complete and neither diagnosis nor the current practices in treatment and rehabilitation is adequately *** models have historically found application as testing beds for novel therapeutics and continue to be valuable aids in pharmacological *** review chronicles the development of those models in the context of Alzheimer's and Parkinson's disease,and highlights the shifting paradigms in studying two humanspecific conditions in non-human organisms.

关键词： Alzheimer's disease animal models neurodegeneration Parkinson's disease