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Journal of Ocean Engineering and Science 2022年第3期7卷 203-212页

作者： archana c.varsoliwala Twinkle R.Singh Applied Mathematics and Humanities Department Sardar Vallabhbhai National Institute of TechnologySurat395007GujaratIndia

This article involves the study of atmospheric internal waves phenomenon,also referred to as gravity *** phenomenon occurs inside the fluid,not on the *** model is based on a shallow fluid hypothesis represented by a system of nonlinear partial differential *** basic assumption of the shallow flow model is that the horizontal size is much larger than the vertical *** internal waves can be perfectly represented by this model as the waves are spread over a large horizontal *** we used the Elzaki Adomian Decomposition Method(EADM)to obtain the solution for the considered model along with its convergence *** Adomian decomposition method together with the Elzaki transform gives the solution in a convergent series without any linearization or *** are built between the results obtained by EADM and HAM to examine the accuracy of the proposed method.

关键词： Atmospheric internal waves Shallow-fluid equations System of nonlinear PDEs Elzaki Adomian decomposition method climate prediction

Mathematical modeling of tsunami wave propagation at mid ocean and its amplification and run-up on shore

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Journal of Ocean Engineering and Science 2021年第4期6卷 367-375页

作者： archana c.varsoliwala Twinkle R.Singh Applied Mathematics and Humanities Department Sardar Vallabhbhai National Institute of TechnologySurat 395007GujaratIndia

The paper deals with the study of the mathematical model of tsunami wave propagation along a coast-line of an *** model is based on shallow-water assumption which is represented by a system of non-linear partial differential *** this study,we employ the Elzaki Adomian Decomposition Method(EADM)to successfully obtain the solution for the proposed model for different coastal slopes and ocean *** tsunami wave velocity and run-up height are affected by the coast slope and sea depth are *** Adomian Decomposition Method together with Elzaki transform allows for solutions,without the need of any linearization or perturbation,in the form of rapidly converging *** obtained numerical results for tsunami wave height and velocity are very close match to the real physical phenomenon of tsunami.

关键词： Tsunami wave propagation Run-up height Shallow water equations Elzaki Adomian Decomposition Method convergence analysis

Serum tumor markers:can they clinically implicate in type 2 diabetes mellitus?

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World Journal of Diabetes 2024年第7期15卷 1648-1650页

作者： Kotha Sugunakar Reddy Ilakkiya Priya Pandiaraj archana Gaur Sakthivadivel Varatharajan Department of General Medicine All India Institute of Medical SciencesHyderabad 508126TelanganaIndia Department of Physiology All India Institute of Medical SciencesHyderabad 508126TelanganaIndia

“Serum tumor markers expression(cA19-9,cA242,and cEA)and its clinical implications in type 2 diabetes mellitus”authored by Meng and Shi presents an observational case-control study investigating the correlation between tumor markers and type 2 diabetes mellitus(T2DM).The study explores the diagnostic accuracy of tumor markers,particularly cancer antigen 19-9(cA19-9),cA242,and carcinoembryonic antigen,in poorly controlled T2DM patients with hemoglobin A1c levels exceeding 9%,employing receiver operating characteristic curve *** study offers valuable insights into the potential utility of tumor markers in clinical practice,caution is advised regarding routine tumor marker testing due to challenges such as limited availability and ***,the study overlooks potential confounding factors like smoking and alcohol *** in cA19-9 and cA242 expression underscore the complex interplay between tumor markers and systemic diseases,warranting further investigation into their diagnostic and prognostic *** Meng and Shi represent a significant contribution to the field,more extensive research is needed to fully elucidate the role of tumor markers in diabetes management and beyond.

关键词： cancer antigen 19-9 cancer antigen 242 carcinoembryonic antigen Tumor markers Type 2 diabetes mellitus

Metal derivative(MD)/g-c_(3)N_(4) association in hydrogen production:A study on the fascinating chemistry behind,current trend and future direction

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Journal of Energy chemistry 2023年第5期80卷 562-583,I0013页

作者： Athira Krishnan Muhsina Yoosuf K.archana A.S.Arsha Amritha Viswam Department of chemistry Amritapuri690525India

Metal derivative/graphitic carbon nitride(g-c_(3)N_(4))association is found promising in providing sustainable hydrogen production by photocatalytic water splitting *** of works reported on the synthesis and application of various metal based g-c_(3)N_(4)composites are increasing day by *** of charge separation varies according to the metal candidate that gets couple with g-c_(3)N_(4).The present article thus explores the interesting chemistry behind various metal based heterojunction and demonstrates the charge separation route.A thorough investigation has been done on the current research trend in the *** many metal free g-c_(3)N_(4)composites are reported nowadays as an alternative to metal derivatives,here compares metallic and metal free derivatives of g-c_(3)N_(4)based on four critical requirements of an industrial catalyst,ie,activity,stability,cost and *** and future direction in the area are also discussed with *** systematic discussion and schematic illustration of charge transfer process in different heterojunctions with reference to the reported systems,given in the article can definitely contribute to the design and development of more efficient g-c_(3)N_(4)based heterojunctions in future for hydrogen production application.

关键词： g-c_(3)N_(4) Photocatalysis Hydrogen evolution reaction Water splitting Metal derivatives Non-metal derivatives

Improving the charge kinetics through in-situ growth of NiSe nanoparticles on g-c_(3)N_(4)nanosheets for efficient hybrid supercapacitors

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Journal of Energy chemistry 2023年第12期87卷 304-313,I0008页

作者： Somnath R.Khaladkar Oshnik Maurya Girish Gund Bhavesh Sinha Deepak Dubal R.R.Deshmukh archana Kalekar Department of Physics Institute of Chemical Technology(ICT)MatungaMumbai 400019MaharashtraIndia Department of Physics Mahatma Phule ArtsScience and Commerce CollegePanvel 410206MaharashtraIndia National center for Nanoscience and Nanotechnology University of MumbaiMumbai 400032MaharashtraIndia centre for Materials Science School of Chemistry and PhysicsQueensland University of TechnologyBrisbane QLD 4000Australia

Nickel selenide(NiSe)has been a promising positive electrode for hybrid supercapacitors due to its multiple oxidation states,tunability,and high specific ***,sluggish ion transfers and particle agglomeration hamper its electrochemical *** the present study,we have grown NiSe nanoparticles on two-dimensional(2D)graphitic carbon nitride(g-c_(3)N_(4))nanosheets to realize three-dimensional(3D)*** 2D support,high nitrogen content,and features of g-c_(3)N_(4)enhanced the specific capacity of the NiSe/g-c_(3)N_(4)nanocomposite *** resulting nanocomposite shows a specific capacity of 320 mA h g^(-1)at a current density of 1 A g^(-1),which is considerably higher than pristine ***,the hybrid supercapacitor(HSc)device was fabricated using NiSe/g-c_(3)N_(4)composite as positive and activated carbon(Ac)as negative *** cell delivered an energy density of 52.5 Wh kg^(-1)at a power density of 1488 W kg^(-1)with excellent cyclic stability of 84.9%over 8000 *** electrochemical performance enhancement corresponds to a 3D structure,high electrochemical active sites,and improved charge transportation at the electrode/electrolyte ***,the present work offers an easy approach and architectural design for high-performance HSc.

关键词： Nickel selenide Graphitic carbon nitride Nanocomposite Specific capacity Hybrid supercapacitor

Preparation, characterization and luminescence behavior of some samarium complexes

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Rare Metals 2021年第9期40卷 2618-2626页

作者： archana chauhan Ritu Langyan Department of chemistry Kurukshetra UniversityKurukshetra 136119India

The synthesis of luminescent complexes of Sm(III) with the general formula [Sm(L)_(3)·(X)] was done in powder form. In the formula, L is 6-methyl-4-oxo-4 H-1-benzopyran-3-carboxaldehyde and X represents 2H_(2)O(c1), 1,10-phenanthroline(c2), 2,20-bipyridine(c3);bathophenanthroline(c4) and neocuproine(c5). The complexes were characterized by using various analytical and spectroscopic tools like elemental analysis, electrospray ionization mass spectrometry(ESI–MS+), Fourier transform infrared spectroscopy(FTIR), ultraviolet–visible(UV–Vis) spectroscopy, thermo-gravimetric analysis/differential thermal gravimetric analysis(TGA/DTG), field emission scanning electron microscopy(FESEM), powder X-ray diffraction(XRD), and photoluminescence(PL)studies. TGA/DTG showed high thermal stability of synthesized complexes. Powder XRD depicts that the average particle size lies in the nano-range. On monitoring at the excitation wavelength of 370 nm, the complexes display characteristic luminescence peaks of Sm(III) at ~564,~600 and ~647 nm assigned to^(4)G_(5/2)→^(6)H_(5/2),^(4)G_(5/2)→^(6)H_(7/2), and ^(4)G_(5/2)→6H9/2 transitions, respectively, with the most intense transition at ~600(orange emission) and~647 nm(bright red emission) in liquid and powder state, respectively. The investigations demonstrate that the synthesized novel complexes might be practically useful in electroluminescent devices, bio-assays, and liquid lasers due to their attractive photoluminescent properties.

关键词： Samarium complexes Luminescence Thermal analysis Quantum yield

Ion conduction in Superionic Glassy Electrolytes:An Overview

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Journal of Materials Science & Technology 2013年第3期29卷 193-208页

作者： Angesh chandra Alok Bhatt archana chandra Department of Applied Physics Shri Shankaracharya Institute of Prof.Manag.& Tech.Raipur 492015C.G.India Department of Applied Physics M.P Christian College of Engg.& Tech.Bhilai 490026C.G.India

The various theoretical and experimental models for ion conduction mechanism of fast ion conducting （FIc） glass electrolytes have been reported in the present review paper. Some characterization techniques of FIc glasses are presented. The experimental methods for determination of some ion transport parameters viz ionic conductivity （σ）, ionic mobility （μ）, mobile ion concentration （n）, ionic drift velocity （Vd）, ionic transference number （tion） and activation energies of FIc glasses are explained. The solid state battery fabrication by using some FIc glasses is also reported.

关键词： Ion conduction Glassy solid electrolyte Fast ion conducting (FIc) glass Superionic solid Relaxation phenomenon

SYNTHESIS, cHARAcTERIZATION AND ION TRANSPORT PROPERTIES OF HOT-PRESSED SOLID POLYMER ELEcTROLYTES (1-x) PEO:x KI

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chinese Journal of Polymer Science 2013年第2期31卷 302-308页

作者： Angesh chandra archana chandra K. Thakur Department of Applied Physics Shri Shankaracharya Institute of Prof. Manag. & Tech.Raipur 492015 C.G. India Department of Applied chemistry Raipur Institute of TechnologyRaipur 492101 C.G. India

Synthesis and ion transport properties of hot-pressed solid polymer electrolytes （SPEs）, （l-x） PEO： x KI, where x is the content of KI in wt%, are reported. A hot-press technique has been used for the formation of the polymeric membranes in place of the usual solution cast method. The composition （80 PEO：20 KI） was identified as the highest conducting polymer electrolyte on the basis of compositional dependent conductivity studies of PEO：KI films. A conductivity enhancement of more than two orders of magnitude from that of the pure PEO was achieved. Materials characterization and ion transport mechanism were explained by using various experimental techniques.

关键词： Solid polymer electrolyte Hot-press technique Ionic conductivity Ionic mobility XRD Polymeric battery.

Electrochemically functionalized graphene as an anti-corrosion reinforcement in cu matrix composite thin films

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International Journal of Minerals,Metallurgy and Materials 2021年第9期28卷 1525-1533页

作者： Akhya kumar Behera Amlan Das Sanjeev Das archana Mallik Electrometallurgy and corrosion Laboratory(Research) Department of Metallurgical and Materials EngineeringNational Institute of TechnologyRourkela 769008OdishaIndia Advanced Metal casting Laboratory Department of Metallurgical and Materials EngineeringNational Institute of TechnologyRaipur 492010ChhatisgarhIndia

cu-graphene(Gr)composite thin films were prepared by electrodeposition route using in-house synthesized Gr *** Gr sheets were synthesized by the electrochemical exfoliation route using 1 M HclO4 acid as *** Gr sheets were confirmed by X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),field-emission scanning electron microscopy(FESEM),and transmission electron microscopy(TEM).The(002)plane of Gr sheets was observed at 2θof 25.66°.The(002)plane confirmed the crystal structure of car-bon *** stretching vibration of c=c bond at a wavelength of 1577 cm^(−1) and other functional groups of carboxyl and epoxide groups were observed from *** confirmed the transparent structure of Gr *** prepared Gr sheets were used as reinforcement at con-centrations of 0.1 and 0.3 g/L with a copper matrix to synthesize the cu-Gr *** prepared composite thin films were characterized by XRD,SEM,and energy-dispersion spectrometry(EDS)for morphological and analytical *** presence of Gr sheets in cu-Gr com-posite was confirmed by EDS *** prepared cu-Gr nanocomposite thin film showed higher corrosion resistance compared with pure copper thin films in 3.5wt%Nacl,as confirmed by Tafel *** impedance spectroscopy complimented the above results and showed that 0.3 g/L composite film achieved the highest film resistance.

关键词： graphene nanocomposite electrodeposition copper

Abscisic Acid Signal off the STARTing Block

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Molecular Plant 2011年第4期4卷 562-580页

作者： archana Joshi-Saha christiane Valon Jeffrey Leung Institut des Sciences du Vegetal Centre National de la Recherche Scientifique UPR2355 1 Avenue de la Terrasse Bat. 23 91198 Gif-sur-Yvette France

The year 2009 marked a real turnaround in our understanding of the mode of abscisic acid （ABA） action. Nearly 25 years had elapsed since the first biochemical detection of ABA-binding proteins in the plasmalemma of Vicia guard cells was reported. This recent--and laudable--achievement is owed largely to the discovery of the soluble ABA receptors whose major interacting proteins happen to be some of the most well-established components of earliest steps in ABA signaling. These soluble receptors, with the double name of PYRABAcTIN RESISTANcE （PYR） or REGULATORY cOMPONENT OF ABA REcEPTOR （RcAR）, are a family of Arabidopsis proteins of about 150-200 amino acids that share a conserved START domain. The ABA signal transduction circuitry under non-stress conditions is muted by the clade A protein phosphatases 2c （PP2c）（notably HAB1, ABI1, and ABI2）. During the initial steps of ABA signaling, the binding of the hormone to the receptor induces a conformational change in the latter that allows it to sequester the PP2cs. This excludes them from the negative regulation of the downstream ABA-activated kinases （OST1/SnRK2.6/SRK2E, SnRK2.2, and SnRK2.3）, thus unleashing the pathway by freeing them to phosphorylate downstream targets that now include several b-ZIP transcription factors, ion channels （SLAc1, KAT1）, and a NADPH oxidase （AtrbohF）. The discovery of this family of soluble receptors and the rich insight already gained from structural studies of their complexes with different isoforms of ABA, PP2c, and the synthetic agonist pyrabactin lay the foundation towards rational design of chemical switches that can bolster drought hardiness in plants.

关键词： Abiotic/environmental stress hormone biology signal transduction.