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Chelation in Metal Intoxication XLVI:Synthesis of Someα-Mercapto-β-Substituted Aryl Acrylic Acids and TheirIn vitro Cadmium Chelating Ability

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Biomedical and Environmental Sciences 2004年第1期17卷 27-32页

作者： MADHUMITA chatterjee VINOD k.DWIVEDI kIRTI kHANDEkAR SUSHIL k.TANDON Chelation Therapy Division Industrial Toxicology Research CenterM.G.MargLucknow-226 001.IndiaChelation Therapy DivisionIndustrial Toxicology Research CenterM.G.MargLucknow-226 001.IndiaChelation Therapy DivisionIndustrial Toxicology Research CenterM.G.MargLucknow-226 001.IndiaChelation Therapy DivisionIndustrial Toxicology Research CenterM.G.MargLucknow-226 001.India

Objective To synthesize some new a-mercapto-β-substituted aryl acrylic acids, characterize them and investigate their in vitro cadmium chelating ability. Methods Six α-mercapto-β-substituted aryl acrylic acids were prepared by the alkaline hydrolysis of 5- (aryl methylene) rhodanines, obtained from the condensation of substituted aldehydes and rhodanine following the reported procedure. The new compounds were characterized by elemental analysis, infrared (IR) and nuclear magnetic resonance (NMR) spectroscopy. The liver and kidney from cadmium chloride pre-administered rats were homogenized and their nuclear mitochondrial fraction (NMF) and supernatant cytosol fraction (SCF) were separated. A measured volume of each fraction was dialyzed separately using 'dialysis sack' against buffered-kCl medium containing a compound in the final concentration of 1×10-3 mol/L for 3 h at 37℃. The whole content of 'sack' was subjected to cadmium estimation following digestion with cone. Nitric acid was detected using flame atomic absorption spectrometer. Results The in vitro screening showed that α-mercapto-β-(p-methoxyphenyl) acrylic acid (compound 2) andα-mercapto-β-(m-methoxy, p-hydroxyphenyl) acrylic acid (compound 4) were more effective than α-mercapto-β-thienyl acrylic acid (compound 1) and a-mercapto-β-(p-dimethylaminophenyl) acrylic acid (compound 3) in mobilizing cadmium as their dialyzable chelates. The presence of a methoxy group on the phenyl moiety (compounds 2 and 4) increases the metal chelating ability of mercapto acrylic acids. Conclusions Compounds 2 and 4 seem to have accessibility to the cellular system and capability of chelating-out the intracellularly bound cadmium.

关键词： Acrylic acid Cadmium In vitro chelation IR /NMR spectra Rat Synthesis

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Competition between axial anomaly and ferromagnetic ordering in Bi_(2-x)Fe_(x)Se_(3-x)S_(x) topological insulator:A study of magnetic and magnetotransport properties

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Journal of Materiomics 2022年第3期8卷 669-677页

作者： Rahul Singh Shiv kumar A.Jain Mahima Singh Labanya Ghosh A.Singh Soma Banik A.Lakhani S.Patil E.F.Schwier k.Shimada S.M.Yusuf Sandip chatterjee Solid State Physics Division Bhabha Atomic Research CenterTrombayMumbai400085India Hiroshima Synchrotron Radiation Center HiroshimaJapan Homi Bhabha National Institute AnushaktinagarMumbai400094India Department of Physics Indian Institute of Technology(BHU)Varanasi221005India Synchrotrons Utilization Section Raja Ramanna Centre for Advanced TechnologyIndore452013India UGC-DAE Consortium for Scientific Research IndoreMadhya Pradesh452017India Department of CMP&MS Tata Institute of Fundamental ResearchMumbai400005India

The topological insulators Bi_(2-x)Fe_(x)Se_(3-x)S_(x) have been investigated by the dc-magnetization,magnetotransport and angle resolved photoemission spectroscopy(ARPES)*** doping of Fe and S,a negative giant magneto-resistance(MR)is observed for parallel electric and magnetic fields(H||E).The MR behavior at lower magnetic field can be explained with the semi-classical theory whereas the MR behavior at higher field has been attributed to the axial ***,the system reached to the quantum limit at low magnetic field(~4.5T).The magnetic ordering can be explained with the presence of both the RkkY(surface)and van-Vleck(bulk)*** ARPES study reveals that a surface gap is suppressed when the magnetic ordering changes from ferromagnetic to anti-ferromagnetic *** ARPES study and the appearance of quantum oscillations(SdH)in the resistivity pattern reveal that the topological surface property is preserved with the co-doping of Fe and S.

关键词： Spintronics Magnetoresistance Magnetism Topological insulators RkkY interaction ARPES study

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A spectroscopic study of the interaction of the antioxidant naringin with bovine serum albumin

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Journal of Biophysical Chemistry 2010年第3期1卷 141-152页

作者： Atanu Singha Roy Debi Ranjan Tripathy Angshuman chatterjee Swagata dasgupta 不详

The interaction of naringin with bovine serum albumin has been performed using fluorescence, circular dichroism and fourier transform infrared spectroscopy in 20 mM phosphate buffer of pH 7.0 as well as molecular docking studies. The changes in enthalpy (ΔH°) and entropy (ΔS°) of the interaction were found to be +18.73 kJ/mol and +143.64 J mol-1 k-1 respectively, indicating that the interaction of naringin with bovine serum albumin occurred mainly through hydrophobic interactions. Negative values of free energy change (ΔG°) at different temperatures point toward the spontaneity of the interaction. Circular dichroism studies reveal that the helical content of bovine serum albumin decreased after interaction with naringin. According to the F?rster non-radiative energy transfer theory the distance between Trp 213 residue and naringin was found to be 3.25 nm. Displacement studies suggest that naringin binds to site 1 (subdomain IIA) of bovine serum albumin (BSA) which was also substantiated by molecular docking studies.

关键词： Naringin Bovine Serum Albumin Fluorescence Binding Warfarin Docking

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Phase Transformation and Mechanical Properties of an Ultrahigh Strength Steel

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Journal of Iron and Steel Research(International) 2011年第S1期18卷 192-199页

作者： S.chatterjee S.k.Ghosh P.S.Bandyopadhyay Sanak Mishra Department of Metallurgy and Materials Engineering BESUShibpurHowrah 711103India Ordnance Development Centre Metal and Steel FactoryIshapore 743144India ArcelorMittal India Limited New Delhi 110025

The present study deals with the development of a low carbon high strength steel by thermomechanical controlled processing on a pilot *** continuous cooling transformation has yielded a flat top "C" curve with the phase field occupied by a mixture of bainite and *** microstructure of water quenched steel essentially consists of highly dislocated lath martensite along with fine (Ti,Nb)CN precipitates and *** strength steel with 1217-1298 MPa yield strength and 1372-1513 MPa ultimate tensile strength along with 16-12% total elongation has been obtained in the range of 850 to 750℃ finish rolling *** impact toughness value in the range of 45-72J was also achieved in the present steel.

关键词： ultrahigh strength steel thermomechanical controlled processing microstructure mechanical properties

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Rare Earth Doped Optical Fibre From Oxide Nanoparticles

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光学学报 2003年第S1期23卷 35-36页

作者： Minati chatterjee Ranjan Sen Mrinmay Pal Milan Naskar Mukul Paul Shyamal Bhadra kamal dasgupta Dibyendu Ganguli Tarun Bandyopadhyay Aharon Gedanken Renata Reisfeld Central Glass & Ceramic Research Institute 196 Raja S.C. Mullick Road Kolkata-700032 IndiaCentral Glass & Ceramic Research Institute 196 Raja S.C. Mullick Road Kolkata-700032 IndiaCentral Glass & Ceramic Research Institute 196 Raja S.C. Mullick Road Kolkata-700032 IndiaCentral Glass & Ceramic Research Institute 196 Raja S.C. Mullick Road Kolkata-700032 IndiaCentral Glass & Ceramic Research Institute 196 Raja S.C. Mullick Road Kolkata-700032 IndiaCentral Glass & Ceramic Research Institute 196 Raja S.C. Mullick Road Kolkata-700032 IndiaCentral Glass & Ceramic Research Institute 196 Raja S.C. Mullick Road Kolkata-700032 IndiaCentral Glass & Ceramic Research Institute 196 Raja S.C. Mullick Road Kolkata-700032 IndiaCentral Glass & Ceramic Research Institute 196 Raja S.C. Mullick Road Kolkata-700032 India2 Bar-IIan University Ramat-Gan 52900 IsraelHebrew University of Jerusalem 91940 Israel

Rare earth (RE) doped optical fibres were fabricated by using RE oxides coated silica nanoparticles. The fibre properties are comparable to those prepared by conventional techniques. The process offers better control ... 详细信息

关键词： MCVD or on of into RE Rare Earth Doped Optical Fibre From Oxide Nanoparticles

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Accretion properties of MAXI J1813-095 during its failed outburst in 2018

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Research in Astronomy and Astrophysics 2021年第5期21卷 235-246页

作者： Arghajit Jana Gaurava k.Jaisawal Sachindra Naik Neeraj kumari Debjit chatterjee kaushikchatterjee Riya Bhowmick Sandip kChakrabarti Hsiang-kuang Chang Dipak Debnath Astronomy&Astrophysics Division Physical Research LaboratoryNavrangpuraAhmedabad 380009India National Space Institute Technical University of DenmarkElektrovej327-328DK-2800 LyngbyDenmark High Energy Astrophysics Indian Centre for Space PhysicsGaria St RoadKolkata 700084India Department of Physics Indian Institute of TechnologyGandhinagar 382355GujaratIndia Indian Institute of Astrophysics KoramangalaBangalore 560034India Department of Physics “National Tsing Hua University”Hsinchu 30013China

We present the results obtained from detailed timing and spectral studies of a black hole candidate MAXI J1813-095 using Swift,NICER,and NuSTAR observations during its 2018 *** timing behavior of the source is mainly studied by examining NICER light curves in the 0.5−10 keV *** did not find any signature of quasi-periodic oscillations in the power density spectra of the *** carry out spectral analysis with a combined disk blackbody&power law model,and physical two-component advective flow(TCAF)*** the combined disk blackbody&power-law model,we extracted thermal and non-thermal fluxes,photon index and inner disk *** also find evidence for weak reflection in the *** have tested the physical TCAF model on a broadband spectrum from NuSTAR and Swift/*** parameters like mass accretion rates,the size of Compton clouds and the shock strength are *** result affirms that the source remained in the hard state during the entire outburst which indicates a‘failed’*** estimate the mass of the black hole as 7.4±1.5M⊙from the spectral study with the TCAF *** apply the LAOR model for the Fe k line *** this,the spin parameter of the black hole is ascertained as a^(∗)>*** inclination angle of the system is estimated to be in the range of 28°−45°from the reflection *** find the source distance to be∼6 kpc.

关键词： X-Rays:binaries stars individual:(MAXI J1813-095) stars:black holes accretion,accretion disks–shock waves radiation:dynamics

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Structural, microstructural, and thermal characterizations of a chalcopyrite concentrate from the Singhbhum shear zone, India

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International Journal of Minerals,Metallurgy and Materials 2015年第3期22卷 225-232页

作者： Ritayan chatterjee Shamik Chaudhuri Saikat kumar kuila Dinabandhu Ghosh Department of Metallurgical and Materials Engineering Jadavpur University Division of Materials Engineering Lund University

The structural and morphological characterizations of a chalcopyrite concentrate, collected from the Indian Copper Complex, Ghatshila, India, were carried out by X-ray diffraction, scanning electron microscopy, and energy-dispersive X-ray spectroscopy. The con- centmte powder was composed mainly of free chalcopyrite and low quartz in about 3：1 weight ratio. The particle size was about 100 μm. Spectroscopic studies （FTIR, Raman, UV-visible） of the concentrate supported the XRD findings, and also revealed a marginal oxidation of the sulfide phase. The energy band gap of the sulfide was found to be 3.4 eV. Differential thermal analysis and thermogravimetry of the con- centrate showed a decomposition of chalcopyrite at 658 k with an activation energy of 208 kJ-mol 1, and two successive structural changes of silica at 848 k and 1145 k.

关键词： chalcopyrite structural properties microstructure thermal characteristics

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Rectangular Microstrip Antenna for Symmetrical 3-D Beam Widths for an Efficient Feed of Reflector Antenna and its Quantitative Analysis

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Journal of Electromagnetic Analysis and Applications 2012年第6期4卷 230-234页

作者： Jitendra kr. Sah Sun chatterjee Pragya Bharati Dia Ghosh Aditi Anand sudipta Chattopadhyay Department of ECE Siliguri Institute of Technology P.O-Sukna Darjeeling 734009 WB India

A simple rectangular microstrip antenna on low dielectric constant substrate such as air for improved radiation beam performance is theoretically investigated. The conventional patch antenna fabricated on common substrates always produces quite broader E plane pattern compared to its H plane. In the present investigation, the same microstrip antenna is designed on air substrate with a view to develop an efficient feed for parabolic reflector antenna, which shows an excellent radiation pattern with symmetrical 3 dB beam widths at its both E and H plane. The present antenna compared to conventional structure to show its excellence in the beam performance is presented. The complete quantitative analysis to explore such radiation beam characteristics for both the structures (conventional and the present one) is also presented in this paper. An easy and handful relationship between the length of patch antenna and its fringing length for different types of substrate is established in the background of 3 dB beam widths. The proposed idea has been verified through a commercial software package for a patch operating in X band and a concrete physical insight into the phenomenon is developed.

关键词： Air Substrate Rectangular Microstrip Antenna Symmetrical Beam widths.

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multi-solitons interaction multicomponent plasma extended Poincare–Lighthill–kuo method head-on collision

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Communications in Theoretical Physics 2016年第2期65卷 237-246页

作者： kaushik Roy Malay kumar Ghorui Prasanta chatterjee Mouloud Tribeche Beluti M.k.M. High School P.O. -Beluti Dist. Birbhum West Bengal-731301 India Department of Mathematics Siksha Bhavana Visva Bharati University Santiniketan-731235 India plasma Physics Group Theoretical Physics Laboratory Faculty of Physics University of Bab-Ezzouar USTHB B.P. 32 E1 Alia Algiers 16111 Algeria

The propagation and interaction between ion acoustic multi-solitons in an unmagnetized multicomponent plasma consisting of fluid hot ions, positrons and both hot and cold electrons, are investigated by employing the extended Poincare–Lighthill–kuo (PLk) method. Two different kortewege-de Vries (k-dV) equations are derived. The Hirota's method is applied to get the k-dV multi-solitons solution. The phase shift due to the overtaking and head- on collision of the multi-solitons is obtained.

关键词：孤子相互作用磁化等离子体庞加莱多组分 Hirota方法相撞多孤子解孤子碰撞

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Quantifying microstructural changes in retinitis pigmentosa using spectral domain – optical coherence tomography

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Eye and Vision 2019年第1期6卷 91-98页

作者： B.Poornachandra Aruj k.khurana Preethi Sridharan Priyansha chatterjee Chaitra Jayadev Naresh kumar Yadav Rohit Shetty Department of Vitreo Retina Narayana Nethralaya Eye InstituteBangaloreIndia. Department of Ophthalmology Narayana Nethralaya Eye Institute121/CChord Road1“R”BlockRajajinagarBangaloreKarnataka 560010India

Background:Most patients of established retinitis pigmentosa(RP)have subnormal peripheral vision and heavily rely on central vision for their daily *** visual acuity is dependent on photoreceptor survival at the *** of structural changes that precede visual loss is *** aim of this study was to correlate the Spectral Domain-Optical Coherence Tomography(SD-OCT)characteristics with visual acuity in patients with typical ***:This was a retrospective,observational case series of 224 eyes of 113 RP patients conducted a tertiary eye care ***-OCT imaging was done for all *** retinal thickness(CRT),photoreceptor outer segment length(PROS),foveal outer segment pigment epithelial thickness(FOSPET)and ellipsoid zone(EZ)extent were measured.A new variable,FOSPET-PROS ratio(FPR),obtained by dividing FOSPET by PROS is defined and correlated to corrected distance visual acuity(CDVA)in logMAR using linear ***:Out of 113 patients,71 were males and 42 *** age of the patients was 35.4±15.1 *** CDVA was 0.33±0.25 logMAR with no difference between the *** CRT(218.74±83.5μm)and FPR(1.63±0.22)significantly correlated to CDVA with a correlation coefficient of r=−0.139(p=0.048)and r=0.842(p=0.0001),***(mean=71.15±13.8μm)and PROS(mean=44.85±12.5μm)did not show a significant correlation to CDVA,independent of ***:Retinal microstructural changes on SD-OCT,especially the FPR,can be used as a surrogate marker to monitor disease progression in the central retina in degenerative diseases like RP.

关键词： Retinitis Pigmentosa Photoreceptor outer segment length(PROS) Foveal outer segment pigment epithelial thickness(FOSPET) Ellipsoid zone(EZ) FOSPET-PROS ratio(FPR)

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